diff --git a/.gitignore b/.gitignore index 799e89f..6095c92 100644 --- a/.gitignore +++ b/.gitignore @@ -2,7 +2,6 @@ *.crt *.pem testdata -fproxy *.swp *.swo *.pub diff --git a/chaining b/chaining new file mode 100644 index 0000000..3bcff07 --- /dev/null +++ b/chaining @@ -0,0 +1,21 @@ +### MAIN FPROXY #### +mecrt, mekey = server +tocrt = nil +fromcrt = intermediatecrt +### INTERMEDIATE #### +mecrt, mekey = signed by main +tocrt = main.crt +fromcrt = endclientcrt +### END CLIENT ### +mycrt, mykey = signed by intermediate + +### FILES ### +maincrt +mainkey +V +intercrt +interkey +V +endcrt +endkey + diff --git a/config/config.go b/config/config.go new file mode 100644 index 0000000..08a460d --- /dev/null +++ b/config/config.go @@ -0,0 +1,45 @@ +package config + +import ( + "flag" + "os" + "strings" +) + +func flagEnvFallback(keyFallback map[string]string) map[string]string { + results := map[string]*string{} + for k, v := range keyFallback { + results[k] = flag.String(k, v, "") + } + flag.Parse() + final := map[string]string{} + for k := range results { + if *results[k] == keyFallback[k] && os.Getenv(strings.ToUpper(k)) != "" { + *results[k] = os.Getenv(strings.ToUpper(k)) + } + final[k] = *results[k] + } + return final +} + +func New() map[string]string { + conf := flagEnvFallback(map[string]string{ + "toaddr": "https://bel.house:20018", + "mycrt": "/Volumes/bldisk/client.crt", + "mykey": "/Volumes/bldisk/client.key", + "tocrt": "/Volumes/bldisk/server.crt", + "fromcrt": "/Volumes/bldisk/accept.crt", + "port": "8888", + "whitelist": "192.168.0.86,,bel.house,,minio.gcp.blapointe.com", + "bypass": "plex.tv", + "secure": "gcp.blapointe.com", + "secret": "secret", + }) + if !strings.HasPrefix(conf["port"], ":") { + conf["port"] = ":" + conf["port"] + } + if len(conf["bypass"]) != 0 { + conf["whitelist"] += ",," + conf["bypass"] + } + return conf +} diff --git a/fproxy/new.go b/fproxy/new.go new file mode 100644 index 0000000..4c46153 --- /dev/null +++ b/fproxy/new.go @@ -0,0 +1,264 @@ +package fproxy + +import ( + "crypto/tls" + "crypto/x509" + "errors" + "io/ioutil" + "net/http" + "net/http/httptest" + "net/url" + "sort" + "strings" +) + +type FProxy struct { + transport *http.Transport + sserver *http.Server + iserver *http.Server + httpport string + tlsport string + whitelist []string + bypass []string + secure []string + localhost []string + mykey string + mycrt string + fromcrt string + tocrt string + sockssecret string +} + +func GetPort() string { + s := httptest.NewUnstartedServer(nil) + s.Close() + return ":" + strings.Split(s.Listener.Addr().String(), ":")[1] +} + +func (fp *FProxy) Apply(conf map[string]string) error { + if v, ok := conf["secret"]; ok && v != "" { + fp.sockssecret = v + } + if v, ok := conf["whitelist"]; ok && v != "" { + fp.WithWhitelist(strings.Split(v, ",,")) + } + if v, ok := conf["bypass"]; ok && v != "" { + fp.WithBypass(strings.Split(v, ",,")) + } + if v, ok := conf["secure"]; ok && v != "" { + fp.WithSecure(strings.Split(v, ",,")) + } + if v, ok := conf["port"]; ok { + fp.setPorts(v) + } else { + fp.setPorts() + } + + if v, ok := conf["mycrt"]; ok && v != "" { + if err := fp.WithCerts(v, conf["mykey"]); err != nil { + return err + } + } + + if v, ok := conf["fromcrt"]; ok && v != "" { + if err := fp.WithFrom(v); err != nil { + return err + } + } + + if v, ok := conf["tocrt"]; ok && v != "" { + if err := fp.WithTo(conf["toaddr"], v); err != nil { + return err + } + } + + return nil +} + +func New(ports ...string) *FProxy { + fp := &FProxy{ + transport: &http.Transport{}, + sserver: &http.Server{}, + iserver: &http.Server{}, + localhost: []string{ + "[::1]", + "127.0.0.1", + "::1", + "bel.pc", + "192.168.0.", + "172.17.0.", + }, + } + sort.Strings(fp.localhost) + fp.sserver.Handler = fp + fp.iserver.Handler = fp + return fp +} + +func (fp *FProxy) setPorts(ports ...string) { + if len(ports) == 0 { + ports = []string{GetPort()} + } + if len(ports) > 0 { + p := string(strings.TrimPrefix(ports[0], ":")[0] + byte(1)) + if p[0] == '7' { + p = "1" + } + ports = []string{ports[0], ":" + p + strings.TrimPrefix(ports[0], ":")[1:]} + } + fp.httpport = ports[0] + fp.tlsport = ports[1] + fp.sserver.Addr = fp.httpport + fp.iserver.Addr = fp.httpport + return +} + +func NewClient(clientCrt, clientKey, proxyCrt, proxyPort string) (*http.Client, error) { + return (&FProxy{ + httpport: proxyPort, + }).NewClient(clientCrt, clientKey, proxyCrt) +} + +func (fp *FProxy) NewClient(certs ...string) (*http.Client, error) { + myport := fp.httpport + if !strings.HasPrefix(myport, ":") { + myport = ":" + myport + } + proxyCrt := fp.mycrt + clientCrt := "" + clientKey := "" + if len(certs) > 1 { + clientCrt = certs[0] + clientKey = certs[1] + if len(certs) > 2 && certs[2] != "" { + proxyCrt = certs[2] + } + } + hclient := &http.Client{} + transport := &http.Transport{ + Proxy: func(r *http.Request) (*url.URL, error) { + if clientCrt == "" { + return url.Parse("http://localhost" + myport) + } else { + return url.Parse("https://localhost" + myport) + } + }, + } + if proxyCrt == "" { + hclient.Transport = transport + return hclient, nil + } + rootCAs, err := x509.SystemCertPool() + if err != nil { + return nil, err + } + cert, err := ioutil.ReadFile(proxyCrt) + if err != nil { + return nil, err + } + rootCAs.AppendCertsFromPEM(cert) + transport.TLSClientConfig = &tls.Config{ + RootCAs: rootCAs, + } + transport.TLSClientConfig.BuildNameToCertificate() + + if clientCrt == "" { + hclient.Transport = transport + return hclient, nil + } else if clientKey == "" { + return nil, errors.New("FProxy requires cert files") + } + + clientCert, err := tls.LoadX509KeyPair(clientCrt, clientKey) + if err != nil { + return nil, err + } + transport.TLSClientConfig.Certificates = []tls.Certificate{clientCert} + transport.TLSClientConfig.BuildNameToCertificate() + + hclient.Transport = transport + return hclient, nil +} + +func (fp *FProxy) WithTo(addr, tocrt string) error { + fp.tocrt = tocrt + toCert, err := ioutil.ReadFile(tocrt) + if err != nil { + return err + } + rootCAs, err := x509.SystemCertPool() + if err != nil { + return err + } + rootCAs.AppendCertsFromPEM(toCert) + if fp.transport.TLSClientConfig == nil { + fp.transport.TLSClientConfig = &tls.Config{} + } + fp.transport.TLSClientConfig.RootCAs = rootCAs + fp.transport.Proxy = func(*http.Request) (*url.URL, error) { + u, err := url.Parse(addr) + if err != nil { + return nil, err + } + u.Scheme = "https" + return u, nil + } + return nil +} + +func (fp *FProxy) WithFrom(fromcrt string) error { + fp.fromcrt = fromcrt + if fp.sserver.TLSConfig == nil { + fp.sserver.TLSConfig = &tls.Config{} + } + + caCert, err := ioutil.ReadFile(fromcrt) + if err != nil { + return err + } + clientCAs := x509.NewCertPool() + clientCAs.AppendCertsFromPEM(caCert) + + fp.sserver.TLSConfig.ClientCAs = clientCAs + fp.sserver.TLSConfig.ClientAuth = tls.RequireAndVerifyClientCert + fp.sserver.TLSConfig.MinVersion = tls.VersionTLS12 + fp.sserver.TLSConfig.CurvePreferences = []tls.CurveID{tls.CurveP521, tls.CurveP384, tls.CurveP256} + fp.sserver.TLSConfig.PreferServerCipherSuites = true + fp.sserver.TLSConfig.CipherSuites = []uint16{ + tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + tls.TLS_RSA_WITH_AES_256_GCM_SHA384, + tls.TLS_RSA_WITH_AES_256_CBC_SHA, + } + fp.sserver.TLSNextProto = make(map[string]func(*http.Server, *tls.Conn, http.Handler), 0) + return nil +} + +func (fp *FProxy) WithCerts(crt, key string) error { + fp.mycrt = crt + fp.mykey = key + clientCert, err := tls.LoadX509KeyPair(crt, key) + if err != nil { + return err + } + if fp.transport.TLSClientConfig == nil { + fp.transport.TLSClientConfig = &tls.Config{} + } + fp.transport.TLSClientConfig.Certificates = []tls.Certificate{clientCert} + return nil +} + +func (fp *FProxy) WithWhitelist(whitelist []string) { + sort.Strings(whitelist) + fp.whitelist = whitelist +} + +func (fp *FProxy) WithBypass(bypass []string) { + sort.Strings(bypass) + fp.bypass = bypass +} + +func (fp *FProxy) WithSecure(secure []string) { + sort.Strings(secure) + fp.secure = secure +} diff --git a/fproxy/new_test.go b/fproxy/new_test.go new file mode 100644 index 0000000..d620da4 --- /dev/null +++ b/fproxy/new_test.go @@ -0,0 +1,252 @@ +package fproxy + +import ( + "io/ioutil" + "local/logger" + "os" + "os/exec" + "path" + "testing" + "time" +) + +func Test_New(t *testing.T) { + New() +} + +func Test_Apply(t *testing.T) { + fp := New() + + level1 := getKeyPair("server", "") + defer os.RemoveAll(path.Dir(level1)) + level2 := getKeyPair("server", level1) + defer os.RemoveAll(path.Dir(level2)) + level3 := getKeyPair("client", level2) + defer os.RemoveAll(path.Dir(level3)) + + if err := fp.Apply(map[string]string{ + "whitelist": "hello,,world", + "bypass": "hello,,world", + "secure": "hello,,world", + "mycrt": level2 + ".crt", + "mykey": level2 + ".key", + "tocrt": level1 + ".crt", + "fromcrt": level3 + ".crt", + }); err != nil { + t.Errorf("failed to apply: %v", err) + } +} + +func Test_Single_Clear(t *testing.T) { + fp1 := New() + + if err := fp1.Apply(map[string]string{ + "whitelist": "hello,,world,,google.com", + "bypass": "hello,,world", + "secure": "hello,,world", + "toaddr": "", + "tocrt": "", + "mycrt": "", + "mykey": "", + "fromcrt": "", + }); err != nil { + t.Fatalf("failed to apply: %v", err) + } + + client, err := fp1.NewClient() + if err != nil { + t.Fatalf("failed to make client: %v", err) + } + + fp1.Start() + defer fp1.Close() + time.Sleep(time.Second * 2) + + if _, err := client.Get("http://google.com"); err != nil { + t.Fatalf("failed to http GET: %v", err) + } + if resp, err := client.Get("https://google.com"); err != nil { + t.Fatalf("failed to https GET: %v", err) + } else if _, err := ioutil.ReadAll(resp.Body); err != nil { + t.Fatalf("cannot ready https google body: %v", err) + } +} + +func Test_Single(t *testing.T) { + fp1 := New() + + level1 := getKeyPair("server", "") + defer os.RemoveAll(path.Dir(level1)) + level3 := getKeyPair("client", level1) + defer os.RemoveAll(path.Dir(level3)) + + if err := fp1.Apply(map[string]string{ + "whitelist": "hello,,world,,google.com", + "bypass": "hello,,world", + "secure": "hello,,world", + "toaddr": "", + "tocrt": "", + "mycrt": level1 + ".crt", + "mykey": level1 + ".key", + "fromcrt": level3 + ".crt", + }); err != nil { + t.Fatalf("failed to apply: %v", err) + } + + client, err := fp1.NewClient(level3+".crt", level3+".key") + if err != nil { + t.Fatalf("failed to make client: %v", err) + } + + fp1.Start() + defer fp1.Close() + time.Sleep(time.Second * 2) + + if _, err := client.Get("http://google.com"); err != nil { + t.Fatalf("failed to http GET: %v", err) + } + if resp, err := client.Get("https://google.com"); err != nil { + t.Fatalf("failed to https GET: %v", err) + } else if _, err := ioutil.ReadAll(resp.Body); err != nil { + t.Fatalf("cannot ready https google body: %v", err) + } +} + +func Test_Chain_ClearEnd(t *testing.T) { + fp1 := New() + fp2 := New() + + level1 := getKeyPair("server", "") + defer os.RemoveAll(path.Dir(level1)) + level2 := getKeyPair("server", level1) + defer os.RemoveAll(path.Dir(level2)) + + if err := fp1.Apply(map[string]string{ + "whitelist": "hello,,world,,google.com", + "bypass": "hello,,world", + "secure": "hello,,world", + "toaddr": "", + "tocrt": "", + "mycrt": level1 + ".crt", + "mykey": level1 + ".key", + "fromcrt": level2 + ".crt", + }); err != nil { + t.Fatalf("failed to apply: %v", err) + } + + if err := fp2.Apply(map[string]string{ + "whitelist": "hello,,world,,google.com", + "bypass": "hello,,world", + "secure": "hello,,world", + "toaddr": "https://localhost" + fp1.sserver.Addr, + "tocrt": level1 + ".crt", + "mycrt": level2 + ".crt", + "mykey": level2 + ".key", + "fromcrt": "", + }); err != nil { + t.Fatalf("failed to apply: %v", err) + } + + client, err := fp2.NewClient() + if err != nil { + t.Fatalf("failed to make client: %v", err) + } + + fp1.Start() + fp2.Start() + defer fp1.Close() + defer fp2.Close() + time.Sleep(time.Second * 2) + + if _, err := client.Get("http://google.com"); err != nil { + t.Fatalf("failed to GET: %v", err) + } + if resp, err := client.Get("https://google.com"); err != nil { + t.Fatalf("failed to GET: %v", err) + } else if _, err := ioutil.ReadAll(resp.Body); err != nil { + t.Fatalf("cannot ready https google body: %v", err) + } +} + +func Test_Chain(t *testing.T) { + fp1 := New() + fp2 := New() + + level1 := getKeyPair("server", "") + defer os.RemoveAll(path.Dir(level1)) + level2 := getKeyPair("server", level1) + defer os.RemoveAll(path.Dir(level2)) + level3 := getKeyPair("client", level2) + defer os.RemoveAll(path.Dir(level3)) + + if err := fp1.Apply(map[string]string{ + "whitelist": "hello,,world,,google.com", + "bypass": "hello,,world", + "secure": "hello,,world", + "toaddr": "", + "tocrt": "", + "mycrt": level1 + ".crt", + "mykey": level1 + ".key", + "fromcrt": level2 + ".crt", + }); err != nil { + t.Fatalf("failed to apply: %v", err) + } + + if err := fp2.Apply(map[string]string{ + "whitelist": "hello,,world,,google.com", + "bypass": "hello,,world", + "secure": "hello,,world", + "toaddr": "https://localhost" + fp1.sserver.Addr, + "tocrt": level1 + ".crt", + "mycrt": level2 + ".crt", + "mykey": level2 + ".key", + "fromcrt": level3 + ".crt", + }); err != nil { + t.Fatalf("failed to apply: %v", err) + } + + client, err := fp2.NewClient(level3+".crt", level3+".key") + if err != nil { + t.Fatalf("failed to make client: %v", err) + } + + fp1.Start() + fp2.Start() + defer fp1.Close() + defer fp2.Close() + time.Sleep(time.Second * 2) + + if _, err := client.Get("http://google.com"); err != nil { + t.Fatalf("failed to GET: %v", err) + } + if _, err := client.Get("https://google.com"); err != nil { + t.Fatalf("failed to GET: %v", err) + } +} + +func getKeyPair(mode, parent string) string { + pcrt := "" + pkey := "" + if parent != "" { + pcrt = parent + ".crt" + pkey = parent + ".key" + } + d, err := ioutil.TempDir("", "fproxytest-"+mode) + if err != nil { + panic(err) + } + cmd := exec.Command("bash", path.Join( + os.Getenv("GOPATH"), + "src", + "local20181107", + "cert-maker", + "openssl.sh", + ), mode, "", "localhost", pcrt, pkey) + cmd.Dir = d + out, err := cmd.CombinedOutput() + if err != nil { + logger.Logf("OUTPUT: %s", out) + panic(err) + } + return path.Join(d, mode) +} diff --git a/fproxy/serve.go b/fproxy/serve.go new file mode 100644 index 0000000..c281fbf --- /dev/null +++ b/fproxy/serve.go @@ -0,0 +1,335 @@ +package fproxy + +import ( + "context" + "fmt" + "io" + "io/ioutil" + "local/encoder" + "local/logger" + "net" + "net/http" + "net/http/httputil" + "net/url" + "regexp" + "sort" + "strings" + "time" + + socks5 "github.com/armon/go-socks5" + "golang.org/x/net/proxy" +) + +func deny(w http.ResponseWriter, r *http.Request) { + w.WriteHeader(http.StatusUnauthorized) + fmt.Fprintln(w, "You shouldn't be here") +} + +func (fp *FProxy) Start() { + if fp.fromcrt != "" { + go func() { + conf := &socks5.Config{ + Credentials: fp, + Rules: fp, + } + server, err := socks5.New(conf) + if err != nil { + panic(err) + } + + if err := server.ListenAndServe("tcp", fp.tlsport); err != nil { + panic(err) + } + }() + } + go func() { + if fp.fromcrt != "" { + if err := fp.sserver.ListenAndServeTLS(fp.mycrt, fp.mykey); err != http.ErrServerClosed { + logger.Fatal(err) + } + } else { + if err := fp.iserver.ListenAndServe(); err != http.ErrServerClosed { + logger.Fatal(err) + } + } + }() +} + +func (fp *FProxy) Valid(user, pass string) bool { + enc, err := encoder.New(nil, &encoder.Salter{}, &encoder.AES{Key: []byte(fp.sockssecret)}) + if err != nil { + return false + } + userb, err := enc.Decode([]byte(user)) + if err != nil { + return false + } + passb, err := enc.Decode([]byte(pass)) + if err != nil { + return false + } + should, err := ioutil.ReadFile(fp.fromcrt) + if err != nil { + return false + } + if string(userb) != string(should[:30]) || string(passb) != string(should[len(should)-30:]) { + return false + } + logger.Log(fp.httpport, "directly connecting socks") + return true +} + +func (fp *FProxy) Allow(ctx context.Context, r *socks5.Request) (context.Context, bool) { + if !fp.fromLocal(r.RemoteAddr.IP.String()) { + logger.Log(fp.httpport, "denying socks from non-local", r.RemoteAddr.IP.String()) + return ctx, false + } + if len(fp.whitelist) > 0 && !contains(fp.whitelist, baseHost(r.DestAddr.FQDN)) && !contains(fp.whitelist, baseHost(r.DestAddr.IP.String())) { + logger.Log(fp.httpport, "denying socks to non-whitelist", r.DestAddr.FQDN) + return ctx, false + } + return ctx, true +} + +func (fp *FProxy) Close() error { + fp.iserver.Shutdown(context.TODO()) + return fp.sserver.Shutdown(context.TODO()) +} + +func (fp *FProxy) ServeHTTP(w http.ResponseWriter, r *http.Request) { + if !fp.fromLocal(r.RemoteAddr) { + logger.Log(fp.httpport, "denying non-local", r.RemoteAddr) + deny(w, r) + return + } + if !fp.toWhitelist(r) { + logger.Log(fp.httpport, "denying non-whitelist", r.URL) + deny(w, r) + return + } + if contains(fp.bypass, baseHost(r.URL.Host)) { + logger.Log(fp.httpport, "passing through", r.URL) + fp.Passthrough(w, r) + return + } + if r.Method == http.MethodConnect && fp.transport.Proxy == nil { + logger.Log(fp.httpport, "directly connecting", r.Host) + fp.Connect(w, r) + return + } + if r.Method == http.MethodConnect && fp.transport.Proxy != nil { + logger.Log(fp.httpport, "connecting", r.Host, "via", fmt.Sprint(fp.transport.Proxy(r))) + fp.Connect(w, r) + return + } + if fp.transport.Proxy != nil { + logger.Log(fp.httpport, "proxying", r.Host, "via", fmt.Sprint(fp.transport.Proxy(r))) + } else { + logger.Log(fp.httpport, "proxying directly to", r.Host) + } + fp.ProxyRequest(w, r) +} + +func (fp *FProxy) Connect(w http.ResponseWriter, r *http.Request) { + if fp.transport.Proxy == nil { + fp.Passthrough(w, r) + return + } + u, err := fp.transport.Proxy(r) + if err != nil { + panic(err) + } + uHost, uPort, err := net.SplitHostPort(u.Host) + if err != nil { + panic(err) + } + switch uPort[0] { + case '6': + uPort = "1" + uPort[1:] + default: + uPort = string(uPort[0]+byte(1)) + uPort[1:] + } + host := net.JoinHostPort(uHost, uPort) + + enc, err := encoder.New(nil, &encoder.Salter{}, &encoder.AES{Key: []byte(fp.sockssecret)}) + if err != nil { + panic(err) + } + should, err := ioutil.ReadFile(fp.mycrt) + if err != nil { + panic(err) + } + user, err := enc.Encode(should[:30]) + if err != nil { + panic(err) + } + pass, err := enc.Encode(should[len(should)-30:]) + if err != nil { + panic(err) + } + + dialer, err := proxy.SOCKS5("tcp", host, &proxy.Auth{ + User: string(user), + Password: string(pass), + }, proxy.Direct) + if err != nil { + panic(err) + } + + dest_conn, err := dialer.Dial("tcp", r.Host) + if err != nil { + http.Error(w, err.Error(), http.StatusServiceUnavailable) + return + } + w.WriteHeader(http.StatusOK) + hijacker, ok := w.(http.Hijacker) + if !ok { + http.Error(w, "Hijacking not supported", http.StatusInternalServerError) + return + } + client_conn, _, err := hijacker.Hijack() + if err != nil { + http.Error(w, err.Error(), http.StatusServiceUnavailable) + } + + transfer := func(destination io.WriteCloser, source io.ReadCloser) { + defer destination.Close() + defer source.Close() + io.Copy(destination, source) + } + go transfer(dest_conn, client_conn) + go transfer(client_conn, dest_conn) +} + +func (fp *FProxy) ProxyRequest(w http.ResponseWriter, r *http.Request) { + copyHeader := func(dst, src http.Header) { + for k, vv := range src { + for _, v := range vv { + dst.Add(k, v) + } + } + } + transport := fp.transport + resp, err := transport.RoundTrip(r) + if err != nil { + logger.Log("ProxyRequest ERR", err) + http.Error(w, err.Error(), http.StatusServiceUnavailable) + return + } + defer resp.Body.Close() + copyHeader(w.Header(), resp.Header) + w.WriteHeader(resp.StatusCode) + io.Copy(w, resp.Body) +} + +func (fp *FProxy) old_Proxy_Request(w http.ResponseWriter, r *http.Request) { + fp.setScheme(r) + proxy := httputil.NewSingleHostReverseProxy(withoutPath(r.URL)) + v := "?" + if fp.transport.Proxy != nil { + proxy.Transport = fp.transport + v = strings.Split(fmt.Sprintln(fp.transport.Proxy(r)), " ")[0] + } + logger.Logf("%s: proxying %q %q -> %q", fp.sserver.Addr, r.Method, withoutPath(r.URL).String(), v) + proxy.ServeHTTP(w, r) + return +} + +func (fp *FProxy) Passthrough(w http.ResponseWriter, r *http.Request) { + if r.URL.Scheme == "http" { + proxy := httputil.NewSingleHostReverseProxy(withoutPath(r.URL)) + proxy.ServeHTTP(w, r) + return + } + dest_conn, err := net.DialTimeout("tcp", r.Host, 10*time.Second) + if err != nil { + http.Error(w, err.Error(), http.StatusServiceUnavailable) + return + } + w.WriteHeader(http.StatusOK) + hijacker, ok := w.(http.Hijacker) + if !ok { + http.Error(w, "Hijacking not supported", http.StatusInternalServerError) + return + } + client_conn, _, err := hijacker.Hijack() + if err != nil { + http.Error(w, err.Error(), http.StatusServiceUnavailable) + } + + transfer := func(destination io.WriteCloser, source io.ReadCloser) { + defer destination.Close() + defer source.Close() + io.Copy(destination, source) + } + + go transfer(dest_conn, client_conn) + go transfer(client_conn, dest_conn) +} + +func (fp *FProxy) setScheme(r *http.Request) { + if r.URL.Scheme == "" { + r.URL.Scheme = "http" + } + if strings.HasSuffix(r.URL.Host, ":443") { + r.URL.Scheme = "https" + //r.URL.Host = r.URL.Host[:len(r.URL.Host)-len(":443")] + } + if contains(fp.secure, baseHost(r.URL.Host)) { + r.URL.Scheme = "https" + } +} + +func (fp *FProxy) toWhitelist(r *http.Request) bool { + return len(fp.whitelist) == 0 || contains(fp.whitelist, baseHost(r.URL.Host)) +} + +func (fp *FProxy) fromLocal(remote string) bool { + if fp.fromcrt != "" { + return true + } + for _, h := range fp.localhost { + if strings.HasPrefix(remote, h) { + return true + } + } + return false +} + +func contains(list []string, element string) bool { + ind := sort.SearchStrings(list, element) + if ind < 0 || ind >= len(list) { + return false + } + return list[ind] == element +} + +func baseHost(host string) string { + host = strings.Replace(host, "www.", "", -1) + host = strings.Replace(host, "http://", "", -1) + host = strings.Replace(host, "https://", "", -1) + host = strings.Split(host, ":")[0] + if ok, err := regexp.MatchString("[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+", host); err != nil { + panic(err) + } else if !ok { + hosts := strings.Split(host, ".") + if len(hosts) > 1 { + host = fmt.Sprintf("%s.%s", hosts[len(hosts)-2], hosts[len(hosts)-1]) + } + } + return host +} + +func withoutPath(u *url.URL) *url.URL { + return &url.URL{ + Scheme: u.Scheme, + Opaque: u.Opaque, + User: u.User, + Host: u.Host, + Path: "", + RawPath: "", + ForceQuery: u.ForceQuery, + RawQuery: u.RawQuery, + Fragment: u.Fragment, + } +} diff --git a/main.go b/main.go index ea5ec21..6536e27 100644 --- a/main.go +++ b/main.go @@ -1,228 +1,25 @@ package main import ( - "crypto/tls" - "crypto/x509" - "flag" - "fmt" - "io" - "io/ioutil" - "local/logger" - "net" - "net/http" - "net/http/httputil" - "net/url" + "local/fproxy/config" + "local/fproxy/fproxy" "os" - "strings" - "time" + "os/signal" + "syscall" ) -type Server struct { - transport *http.Transport - whitelist []string - bypass []string - secure []string -} - -func NewServer(addr, clientcrt, clientkey, servercrt string, whitelist, bypass, secure []string) (*Server, error) { - caCert, err := ioutil.ReadFile(servercrt) - if err != nil { - return nil, err - } - rootCAs, err := x509.SystemCertPool() - if err != nil { - return nil, err - } - rootCAs.AppendCertsFromPEM(caCert) - clientCert, err := tls.LoadX509KeyPair(clientcrt, clientkey) - if err != nil { - return nil, err - } - return &Server{ - transport: &http.Transport{ - Proxy: func(r *http.Request) (*url.URL, error) { - return url.Parse(addr) - }, - TLSClientConfig: &tls.Config{ - RootCAs: rootCAs, - Certificates: []tls.Certificate{clientCert}, - }, - }, - whitelist: whitelist, - bypass: bypass, - secure: secure, - }, nil -} - -func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) { - // fix scheme if necessary - fixScheme(r) - // if not from localhost - if !fromLocalhost(r.RemoteAddr) { - logger.Log("Denying non-localhost", r.RemoteAddr) - denyAccess(w) - return - } - if !toWhitelist(s.whitelist, r.URL.Host) { - logger.Log("Denying non-whitelisted", r.URL.Host) - denyAccess(w) - return - } - if toWhitelist(s.bypass, r.URL.Host) { - logger.Log("Bypassing", r.URL.String()) - s.passthrough(w, r) - return - } - if toWhitelist(s.secure, r.URL.Host) { - logger.Log("Securing", r.URL.String(), r.Host) - r.URL.Scheme = "https" - } - //logger.Log("Proxying", r.URL.String()) - // proxy via stuncaddsies - s.handleHTTP(w, r) -} - -func (s *Server) passthrough(w http.ResponseWriter, r *http.Request) { - if r.URL.Scheme == "http" { - proxy := httputil.NewSingleHostReverseProxy(pathlessURL(r.URL)) - proxy.ServeHTTP(w, r) - return - } - dest_conn, err := net.DialTimeout("tcp", r.Host, 10*time.Second) - if err != nil { - http.Error(w, err.Error(), http.StatusServiceUnavailable) - return - } - w.WriteHeader(http.StatusOK) - hijacker, ok := w.(http.Hijacker) - if !ok { - http.Error(w, "Hijacking not supported", http.StatusInternalServerError) - return - } - client_conn, _, err := hijacker.Hijack() - if err != nil { - http.Error(w, err.Error(), http.StatusServiceUnavailable) - } - - transfer := func(destination io.WriteCloser, source io.ReadCloser) { - defer destination.Close() - defer source.Close() - io.Copy(destination, source) - } - - go transfer(dest_conn, client_conn) - go transfer(client_conn, dest_conn) -} - -func (s *Server) handleHTTP(w http.ResponseWriter, r *http.Request) { - proxy := httputil.NewSingleHostReverseProxy(pathlessURL(r.URL)) - proxy.Transport = s.transport - proxy.ServeHTTP(w, r) - return -} - -func copyHeader(dst, src http.Header) { - for k, vv := range src { - for _, v := range vv { - dst.Add(k, v) - } - } -} - -func fixScheme(r *http.Request) { - if r.URL.Scheme == "" { - r.URL.Scheme = "http" - } - if strings.HasSuffix(r.URL.Host, ":443") { - r.URL.Scheme = "https" - r.URL.Host = r.URL.Host[:len(r.URL.Host)-len(":443")] - } - //r.URL.Scheme = "https" -} - -func toWhitelist(okay []string, host string) bool { - host = strings.Split(host, ":")[0] - host = strings.Replace(host, "www.", "", -1) - host = strings.Replace(host, "http://", "", -1) - host = strings.Replace(host, "https://", "", -1) - hosts := strings.Split(host, ".") - if len(hosts) > 1 { - host = hosts[len(hosts)-2] + "." + hosts[len(hosts)-1] - } - for i := range okay { - if strings.Contains(okay[i], host) { - return true - } - } - return false -} - -func fromLocalhost(addr string) bool { - return strings.Contains(addr, "[::1]") || addr == "127.0.0.1" || addr == "::1" || strings.Contains(addr, "bel.pc") || strings.Contains(addr, "192.168.0.") -} - -func denyAccess(w http.ResponseWriter) { - w.WriteHeader(http.StatusUnauthorized) - fmt.Fprintln(w, "You shouldn't be here") -} - -func pathlessURL(u *url.URL) *url.URL { - return &url.URL{ - Scheme: u.Scheme, - Opaque: u.Opaque, - User: u.User, - Host: u.Host, - Path: "", - RawPath: "", - ForceQuery: u.ForceQuery, - RawQuery: u.RawQuery, - Fragment: u.Fragment, - } -} - -func transfer(destination io.WriteCloser, source io.ReadCloser) { - defer destination.Close() - defer source.Close() - io.Copy(destination, source) -} - -func flagEnvFallback(keyFallback map[string]string) map[string]string { - results := map[string]*string{} - for k, v := range keyFallback { - results[k] = flag.String(k, v, "") - } - flag.Parse() - final := map[string]string{} - for k := range results { - if *results[k] == keyFallback[k] && os.Getenv(strings.ToUpper(k)) != "" { - *results[k] = os.Getenv(strings.ToUpper(k)) - } - final[k] = *results[k] - } - return final -} - func main() { - conf := flagEnvFallback(map[string]string{ - "stunaddr": "https://bel.house:20018", - "clientcrt": "/Volumes/bldisk/client.crt", - "clientkey": "/Volumes/bldisk/client.key", - "servercrt": "/Volumes/bldisk/server.crt", - "port": "8888", - "whitelist": "192.168.0.86,,bel.house,,minio.gcp.blapointe.com", - "bypass": "plex.tv", - "secure": "gcp.blapointe.com", - }) - if !strings.HasPrefix(conf["port"], ":") { - conf["port"] = ":" + conf["port"] + conf := config.New() + + fp := fproxy.New(conf["port"]) + if err := fp.Apply(conf); err != nil { + panic(err) } - whitelist := strings.Split(conf["whitelist"], ",,") - bypass := strings.Split(conf["bypass"], ",,") - secure := strings.Split(conf["secure"], ",,") - logger.Log(conf) - server, err := NewServer(conf["stunaddr"], conf["clientcrt"], conf["clientkey"], conf["servercrt"], append(whitelist, bypass...), bypass, secure) - if err != nil { - logger.Fatal(err) - } - logger.Fatal(http.ListenAndServe(conf["port"], server)) + + fp.Start() + defer fp.Close() + + sigc := make(chan os.Signal) + signal.Notify(sigc, syscall.SIGINT) + <-sigc } diff --git a/main_test.go b/main_test.go new file mode 100644 index 0000000..2ca1e10 --- /dev/null +++ b/main_test.go @@ -0,0 +1,55 @@ +package main + +import ( + "local/fproxy/fproxy" + "testing" +) + +func Test_StandaloneClient(t *testing.T) { + conf := map[string]string{ + "toaddr": "", + "mycrt": "./testdata/mainserver.crt", + "mykey": "./testdata/mainserver.key", + "tocrt": "", + "fromcrt": "./testdata/interclient.crt", + "port": fproxy.GetPort(), + "whitelist": "google.com,,plex.tv", + "bypass": "plex.tv", + "secure": "", + "secret": "secret", + } + fp := fproxy.New(conf["port"]) + if err := fp.Apply(conf); err != nil { + t.Fatalf("error applying conf: %v", err) + } + + client, err := fproxy.NewClient("./testdata/interclient.crt", "./testdata/interclient.key", "./testdata/mainserver.crt", conf["port"]) + if err != nil { + t.Fatalf("cannot make client: %v", err) + } + + ready := make(chan struct{}) + go func() { + fp.Start() + ready <- struct{}{} + <-ready + fp.Close() + ready <- struct{}{} + }() + <-ready + + if resp, err := client.Get("http://google.com"); err != nil { + t.Errorf("client cannot get: %v", err) + } else if resp.StatusCode > 399 { + t.Errorf("client status > 399: %v", resp.StatusCode) + } + + if resp, err := client.Get("https://google.com"); err != nil { + t.Errorf("client cannot get: %v", err) + } else if resp.StatusCode > 399 { + t.Errorf("client status > 399: %v", resp.StatusCode) + } + + ready <- struct{}{} + <-ready +} diff --git a/oldmain.go b/oldmain.go new file mode 100644 index 0000000..0b4e2e7 --- /dev/null +++ b/oldmain.go @@ -0,0 +1,262 @@ +package main + +import ( + "crypto/tls" + "crypto/x509" + "flag" + "fmt" + "io" + "io/ioutil" + "local/logger" + "net" + "net/http" + "net/http/httputil" + "net/url" + "os" + "strings" + "time" +) + +type Server struct { + transport *http.Transport + server *http.Server + whitelist []string + bypass []string + secure []string +} + +func NewServer(port, addr, mecrt, mekey, tocrt, fromcrt string, whitelist, bypass, secure []string) (*Server, error) { + caCert, err := ioutil.ReadFile(tocrt) + if err != nil { + return nil, err + } + rootCAs, err := x509.SystemCertPool() + if err != nil { + return nil, err + } + rootCAs.AppendCertsFromPEM(caCert) + + clientCert, err := tls.LoadX509KeyPair(mecrt, mekey) + if err != nil { + return nil, err + } + + acceptCaCert, err := ioutil.ReadFile(fromcrt) + if err != nil { + return nil, err + } + clientCAs := x509.NewCertPool() + clientCAs.AppendCertsFromPEM(acceptCaCert) + + s := &Server{ + transport: &http.Transport{ + Proxy: func(r *http.Request) (*url.URL, error) { + return url.Parse(addr) + }, + TLSClientConfig: &tls.Config{ + RootCAs: rootCAs, + Certificates: []tls.Certificate{clientCert}, + }, + }, + whitelist: whitelist, + bypass: bypass, + secure: secure, + } + s.server = &http.Server{ + Addr: "11244", + Handler: s, + TLSConfig: &tls.Config{ + ClientCAs: clientCAs, + ClientAuth: tls.RequireAndVerifyClientCert, + MinVersion: tls.VersionTLS12, + CurvePreferences: []tls.CurveID{tls.CurveP521, tls.CurveP384, tls.CurveP256}, + PreferServerCipherSuites: true, + CipherSuites: []uint16{ + tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, + tls.TLS_RSA_WITH_AES_256_GCM_SHA384, + tls.TLS_RSA_WITH_AES_256_CBC_SHA, + }, + }, + TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler), 0), + } + return s, nil +} + +func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) { + // fix scheme if necessary + fixScheme(r) + // if not from localhost + if !fromLocalhost(r.RemoteAddr) { + logger.Log("Denying non-localhost", r.RemoteAddr) + denyAccess(w) + return + } + if !toWhitelist(s.whitelist, r.URL.Host) { + logger.Log("Denying non-whitelisted", r.URL.Host) + denyAccess(w) + return + } + if toWhitelist(s.bypass, r.URL.Host) { + logger.Log("Bypassing", r.URL.String()) + s.passthrough(w, r) + return + } + if toWhitelist(s.secure, r.URL.Host) { + logger.Log("Securing", r.URL.String(), r.Host) + r.URL.Scheme = "https" + } + //logger.Log("Proxying", r.URL.String(), r.Host, *r) + // proxy via stuncaddsies + s.handleHTTP(w, r) +} + +func (s *Server) passthrough(w http.ResponseWriter, r *http.Request) { + if r.URL.Scheme == "http" { + proxy := httputil.NewSingleHostReverseProxy(pathlessURL(r.URL)) + proxy.ServeHTTP(w, r) + return + } + dest_conn, err := net.DialTimeout("tcp", r.Host, 10*time.Second) + if err != nil { + http.Error(w, err.Error(), http.StatusServiceUnavailable) + return + } + w.WriteHeader(http.StatusOK) + hijacker, ok := w.(http.Hijacker) + if !ok { + http.Error(w, "Hijacking not supported", http.StatusInternalServerError) + return + } + client_conn, _, err := hijacker.Hijack() + if err != nil { + http.Error(w, err.Error(), http.StatusServiceUnavailable) + } + + transfer := func(destination io.WriteCloser, source io.ReadCloser) { + defer destination.Close() + defer source.Close() + io.Copy(destination, source) + } + + go transfer(dest_conn, client_conn) + go transfer(client_conn, dest_conn) +} + +func (s *Server) handleHTTP(w http.ResponseWriter, r *http.Request) { + proxy := httputil.NewSingleHostReverseProxy(pathlessURL(r.URL)) + proxy.Transport = s.transport + proxy.ServeHTTP(w, r) + return +} + +func copyHeader(dst, src http.Header) { + for k, vv := range src { + for _, v := range vv { + dst.Add(k, v) + } + } +} + +func fixScheme(r *http.Request) { + if r.URL.Scheme == "" { + r.URL.Scheme = "http" + } + if strings.HasSuffix(r.URL.Host, ":443") { + r.URL.Scheme = "https" + r.URL.Host = r.URL.Host[:len(r.URL.Host)-len(":443")] + } + //r.URL.Scheme = "https" +} + +func toWhitelist(okay []string, host string) bool { + host = strings.Split(host, ":")[0] + host = strings.Replace(host, "www.", "", -1) + host = strings.Replace(host, "http://", "", -1) + host = strings.Replace(host, "https://", "", -1) + hosts := strings.Split(host, ".") + if len(hosts) > 1 { + host = hosts[len(hosts)-2] + "." + hosts[len(hosts)-1] + } + for i := range okay { + if strings.Contains(okay[i], host) { + return true + } + } + return false +} + +func fromLocalhost(addr string) bool { + return strings.Contains(addr, "[::1]") || strings.HasPrefix(addr, "127.0.0.1") || addr == "::1" || strings.Contains(addr, "bel.pc") || strings.Contains(addr, "192.168.0.") +} + +func denyAccess(w http.ResponseWriter) { + w.WriteHeader(http.StatusUnauthorized) + fmt.Fprintln(w, "You shouldn't be here") +} + +func pathlessURL(u *url.URL) *url.URL { + return &url.URL{ + Scheme: u.Scheme, + Opaque: u.Opaque, + User: u.User, + Host: u.Host, + Path: "", + RawPath: "", + ForceQuery: u.ForceQuery, + RawQuery: u.RawQuery, + Fragment: u.Fragment, + } +} + +func transfer(destination io.WriteCloser, source io.ReadCloser) { + defer destination.Close() + defer source.Close() + io.Copy(destination, source) +} + +func flagEnvFallback(keyFallback map[string]string) map[string]string { + results := map[string]*string{} + for k, v := range keyFallback { + results[k] = flag.String(k, v, "") + } + flag.Parse() + final := map[string]string{} + for k := range results { + if *results[k] == keyFallback[k] && os.Getenv(strings.ToUpper(k)) != "" { + *results[k] = os.Getenv(strings.ToUpper(k)) + } + final[k] = *results[k] + } + return final +} + +func oldmain() { + conf := flagEnvFallback(map[string]string{ + "stunaddr": "https://bel.house:20018", + "mecrt": "/Volumes/bldisk/client.crt", + "mekey": "/Volumes/bldisk/client.key", + "tocrt": "/Volumes/bldisk/server.crt", + "fromcrt": "/Volumes/bldisk/accept.crt", + "port": "8888", + "whitelist": "192.168.0.86,,bel.house,,minio.gcp.blapointe.com", + "bypass": "plex.tv", + "secure": "gcp.blapointe.com", + }) + if !strings.HasPrefix(conf["port"], ":") { + conf["port"] = ":" + conf["port"] + } + whitelist := strings.Split(conf["whitelist"], ",,") + bypass := strings.Split(conf["bypass"], ",,") + secure := strings.Split(conf["secure"], ",,") + logger.Log(conf) + server, err := NewServer(conf["port"], conf["stunaddr"], conf["mecrt"], conf["mekey"], conf["tocrt"], conf["fromcrt"], append(whitelist, bypass...), bypass, secure) + if err != nil { + logger.Fatal(err) + } + if conf["fromcrt"] != "" { + logger.Fatal(server.server.ListenAndServeTLS(conf["mecrt"], conf["mekey"])) + } else { + logger.Fatal(http.ListenAndServe(conf["port"], server)) + } +} diff --git a/vendor/github.com/armon/go-socks5/LICENSE b/vendor/github.com/armon/go-socks5/LICENSE new file mode 100644 index 0000000..a5df10e --- /dev/null +++ b/vendor/github.com/armon/go-socks5/LICENSE @@ -0,0 +1,20 @@ +The MIT License (MIT) + +Copyright (c) 2014 Armon Dadgar + +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software is furnished to do so, +subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. diff --git a/vendor/github.com/armon/go-socks5/README.md b/vendor/github.com/armon/go-socks5/README.md new file mode 100644 index 0000000..9cd1563 --- /dev/null +++ b/vendor/github.com/armon/go-socks5/README.md @@ -0,0 +1,45 @@ +go-socks5 [![Build Status](https://travis-ci.org/armon/go-socks5.png)](https://travis-ci.org/armon/go-socks5) +========= + +Provides the `socks5` package that implements a [SOCKS5 server](http://en.wikipedia.org/wiki/SOCKS). +SOCKS (Secure Sockets) is used to route traffic between a client and server through +an intermediate proxy layer. This can be used to bypass firewalls or NATs. + +Feature +======= + +The package has the following features: +* "No Auth" mode +* User/Password authentication +* Support for the CONNECT command +* Rules to do granular filtering of commands +* Custom DNS resolution +* Unit tests + +TODO +==== + +The package still needs the following: +* Support for the BIND command +* Support for the ASSOCIATE command + + +Example +======= + +Below is a simple example of usage + +```go +// Create a SOCKS5 server +conf := &socks5.Config{} +server, err := socks5.New(conf) +if err != nil { + panic(err) +} + +// Create SOCKS5 proxy on localhost port 8000 +if err := server.ListenAndServe("tcp", "127.0.0.1:8000"); err != nil { + panic(err) +} +``` + diff --git a/vendor/github.com/armon/go-socks5/auth.go b/vendor/github.com/armon/go-socks5/auth.go new file mode 100644 index 0000000..7811e2a --- /dev/null +++ b/vendor/github.com/armon/go-socks5/auth.go @@ -0,0 +1,151 @@ +package socks5 + +import ( + "fmt" + "io" +) + +const ( + NoAuth = uint8(0) + noAcceptable = uint8(255) + UserPassAuth = uint8(2) + userAuthVersion = uint8(1) + authSuccess = uint8(0) + authFailure = uint8(1) +) + +var ( + UserAuthFailed = fmt.Errorf("User authentication failed") + NoSupportedAuth = fmt.Errorf("No supported authentication mechanism") +) + +// A Request encapsulates authentication state provided +// during negotiation +type AuthContext struct { + // Provided auth method + Method uint8 + // Payload provided during negotiation. + // Keys depend on the used auth method. + // For UserPassauth contains Username + Payload map[string]string +} + +type Authenticator interface { + Authenticate(reader io.Reader, writer io.Writer) (*AuthContext, error) + GetCode() uint8 +} + +// NoAuthAuthenticator is used to handle the "No Authentication" mode +type NoAuthAuthenticator struct{} + +func (a NoAuthAuthenticator) GetCode() uint8 { + return NoAuth +} + +func (a NoAuthAuthenticator) Authenticate(reader io.Reader, writer io.Writer) (*AuthContext, error) { + _, err := writer.Write([]byte{socks5Version, NoAuth}) + return &AuthContext{NoAuth, nil}, err +} + +// UserPassAuthenticator is used to handle username/password based +// authentication +type UserPassAuthenticator struct { + Credentials CredentialStore +} + +func (a UserPassAuthenticator) GetCode() uint8 { + return UserPassAuth +} + +func (a UserPassAuthenticator) Authenticate(reader io.Reader, writer io.Writer) (*AuthContext, error) { + // Tell the client to use user/pass auth + if _, err := writer.Write([]byte{socks5Version, UserPassAuth}); err != nil { + return nil, err + } + + // Get the version and username length + header := []byte{0, 0} + if _, err := io.ReadAtLeast(reader, header, 2); err != nil { + return nil, err + } + + // Ensure we are compatible + if header[0] != userAuthVersion { + return nil, fmt.Errorf("Unsupported auth version: %v", header[0]) + } + + // Get the user name + userLen := int(header[1]) + user := make([]byte, userLen) + if _, err := io.ReadAtLeast(reader, user, userLen); err != nil { + return nil, err + } + + // Get the password length + if _, err := reader.Read(header[:1]); err != nil { + return nil, err + } + + // Get the password + passLen := int(header[0]) + pass := make([]byte, passLen) + if _, err := io.ReadAtLeast(reader, pass, passLen); err != nil { + return nil, err + } + + // Verify the password + if a.Credentials.Valid(string(user), string(pass)) { + if _, err := writer.Write([]byte{userAuthVersion, authSuccess}); err != nil { + return nil, err + } + } else { + if _, err := writer.Write([]byte{userAuthVersion, authFailure}); err != nil { + return nil, err + } + return nil, UserAuthFailed + } + + // Done + return &AuthContext{UserPassAuth, map[string]string{"Username": string(user)}}, nil +} + +// authenticate is used to handle connection authentication +func (s *Server) authenticate(conn io.Writer, bufConn io.Reader) (*AuthContext, error) { + // Get the methods + methods, err := readMethods(bufConn) + if err != nil { + return nil, fmt.Errorf("Failed to get auth methods: %v", err) + } + + // Select a usable method + for _, method := range methods { + cator, found := s.authMethods[method] + if found { + return cator.Authenticate(bufConn, conn) + } + } + + // No usable method found + return nil, noAcceptableAuth(conn) +} + +// noAcceptableAuth is used to handle when we have no eligible +// authentication mechanism +func noAcceptableAuth(conn io.Writer) error { + conn.Write([]byte{socks5Version, noAcceptable}) + return NoSupportedAuth +} + +// readMethods is used to read the number of methods +// and proceeding auth methods +func readMethods(r io.Reader) ([]byte, error) { + header := []byte{0} + if _, err := r.Read(header); err != nil { + return nil, err + } + + numMethods := int(header[0]) + methods := make([]byte, numMethods) + _, err := io.ReadAtLeast(r, methods, numMethods) + return methods, err +} diff --git a/vendor/github.com/armon/go-socks5/credentials.go b/vendor/github.com/armon/go-socks5/credentials.go new file mode 100644 index 0000000..9666427 --- /dev/null +++ b/vendor/github.com/armon/go-socks5/credentials.go @@ -0,0 +1,17 @@ +package socks5 + +// CredentialStore is used to support user/pass authentication +type CredentialStore interface { + Valid(user, password string) bool +} + +// StaticCredentials enables using a map directly as a credential store +type StaticCredentials map[string]string + +func (s StaticCredentials) Valid(user, password string) bool { + pass, ok := s[user] + if !ok { + return false + } + return password == pass +} diff --git a/vendor/github.com/armon/go-socks5/request.go b/vendor/github.com/armon/go-socks5/request.go new file mode 100644 index 0000000..b615fcb --- /dev/null +++ b/vendor/github.com/armon/go-socks5/request.go @@ -0,0 +1,364 @@ +package socks5 + +import ( + "fmt" + "io" + "net" + "strconv" + "strings" + + "golang.org/x/net/context" +) + +const ( + ConnectCommand = uint8(1) + BindCommand = uint8(2) + AssociateCommand = uint8(3) + ipv4Address = uint8(1) + fqdnAddress = uint8(3) + ipv6Address = uint8(4) +) + +const ( + successReply uint8 = iota + serverFailure + ruleFailure + networkUnreachable + hostUnreachable + connectionRefused + ttlExpired + commandNotSupported + addrTypeNotSupported +) + +var ( + unrecognizedAddrType = fmt.Errorf("Unrecognized address type") +) + +// AddressRewriter is used to rewrite a destination transparently +type AddressRewriter interface { + Rewrite(ctx context.Context, request *Request) (context.Context, *AddrSpec) +} + +// AddrSpec is used to return the target AddrSpec +// which may be specified as IPv4, IPv6, or a FQDN +type AddrSpec struct { + FQDN string + IP net.IP + Port int +} + +func (a *AddrSpec) String() string { + if a.FQDN != "" { + return fmt.Sprintf("%s (%s):%d", a.FQDN, a.IP, a.Port) + } + return fmt.Sprintf("%s:%d", a.IP, a.Port) +} + +// Address returns a string suitable to dial; prefer returning IP-based +// address, fallback to FQDN +func (a AddrSpec) Address() string { + if 0 != len(a.IP) { + return net.JoinHostPort(a.IP.String(), strconv.Itoa(a.Port)) + } + return net.JoinHostPort(a.FQDN, strconv.Itoa(a.Port)) +} + +// A Request represents request received by a server +type Request struct { + // Protocol version + Version uint8 + // Requested command + Command uint8 + // AuthContext provided during negotiation + AuthContext *AuthContext + // AddrSpec of the the network that sent the request + RemoteAddr *AddrSpec + // AddrSpec of the desired destination + DestAddr *AddrSpec + // AddrSpec of the actual destination (might be affected by rewrite) + realDestAddr *AddrSpec + bufConn io.Reader +} + +type conn interface { + Write([]byte) (int, error) + RemoteAddr() net.Addr +} + +// NewRequest creates a new Request from the tcp connection +func NewRequest(bufConn io.Reader) (*Request, error) { + // Read the version byte + header := []byte{0, 0, 0} + if _, err := io.ReadAtLeast(bufConn, header, 3); err != nil { + return nil, fmt.Errorf("Failed to get command version: %v", err) + } + + // Ensure we are compatible + if header[0] != socks5Version { + return nil, fmt.Errorf("Unsupported command version: %v", header[0]) + } + + // Read in the destination address + dest, err := readAddrSpec(bufConn) + if err != nil { + return nil, err + } + + request := &Request{ + Version: socks5Version, + Command: header[1], + DestAddr: dest, + bufConn: bufConn, + } + + return request, nil +} + +// handleRequest is used for request processing after authentication +func (s *Server) handleRequest(req *Request, conn conn) error { + ctx := context.Background() + + // Resolve the address if we have a FQDN + dest := req.DestAddr + if dest.FQDN != "" { + ctx_, addr, err := s.config.Resolver.Resolve(ctx, dest.FQDN) + if err != nil { + if err := sendReply(conn, hostUnreachable, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + return fmt.Errorf("Failed to resolve destination '%v': %v", dest.FQDN, err) + } + ctx = ctx_ + dest.IP = addr + } + + // Apply any address rewrites + req.realDestAddr = req.DestAddr + if s.config.Rewriter != nil { + ctx, req.realDestAddr = s.config.Rewriter.Rewrite(ctx, req) + } + + // Switch on the command + switch req.Command { + case ConnectCommand: + return s.handleConnect(ctx, conn, req) + case BindCommand: + return s.handleBind(ctx, conn, req) + case AssociateCommand: + return s.handleAssociate(ctx, conn, req) + default: + if err := sendReply(conn, commandNotSupported, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + return fmt.Errorf("Unsupported command: %v", req.Command) + } +} + +// handleConnect is used to handle a connect command +func (s *Server) handleConnect(ctx context.Context, conn conn, req *Request) error { + // Check if this is allowed + if ctx_, ok := s.config.Rules.Allow(ctx, req); !ok { + if err := sendReply(conn, ruleFailure, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + return fmt.Errorf("Connect to %v blocked by rules", req.DestAddr) + } else { + ctx = ctx_ + } + + // Attempt to connect + dial := s.config.Dial + if dial == nil { + dial = func(ctx context.Context, net_, addr string) (net.Conn, error) { + return net.Dial(net_, addr) + } + } + target, err := dial(ctx, "tcp", req.realDestAddr.Address()) + if err != nil { + msg := err.Error() + resp := hostUnreachable + if strings.Contains(msg, "refused") { + resp = connectionRefused + } else if strings.Contains(msg, "network is unreachable") { + resp = networkUnreachable + } + if err := sendReply(conn, resp, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + return fmt.Errorf("Connect to %v failed: %v", req.DestAddr, err) + } + defer target.Close() + + // Send success + local := target.LocalAddr().(*net.TCPAddr) + bind := AddrSpec{IP: local.IP, Port: local.Port} + if err := sendReply(conn, successReply, &bind); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + + // Start proxying + errCh := make(chan error, 2) + go proxy(target, req.bufConn, errCh) + go proxy(conn, target, errCh) + + // Wait + for i := 0; i < 2; i++ { + e := <-errCh + if e != nil { + // return from this function closes target (and conn). + return e + } + } + return nil +} + +// handleBind is used to handle a connect command +func (s *Server) handleBind(ctx context.Context, conn conn, req *Request) error { + // Check if this is allowed + if ctx_, ok := s.config.Rules.Allow(ctx, req); !ok { + if err := sendReply(conn, ruleFailure, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + return fmt.Errorf("Bind to %v blocked by rules", req.DestAddr) + } else { + ctx = ctx_ + } + + // TODO: Support bind + if err := sendReply(conn, commandNotSupported, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + return nil +} + +// handleAssociate is used to handle a connect command +func (s *Server) handleAssociate(ctx context.Context, conn conn, req *Request) error { + // Check if this is allowed + if ctx_, ok := s.config.Rules.Allow(ctx, req); !ok { + if err := sendReply(conn, ruleFailure, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + return fmt.Errorf("Associate to %v blocked by rules", req.DestAddr) + } else { + ctx = ctx_ + } + + // TODO: Support associate + if err := sendReply(conn, commandNotSupported, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + return nil +} + +// readAddrSpec is used to read AddrSpec. +// Expects an address type byte, follwed by the address and port +func readAddrSpec(r io.Reader) (*AddrSpec, error) { + d := &AddrSpec{} + + // Get the address type + addrType := []byte{0} + if _, err := r.Read(addrType); err != nil { + return nil, err + } + + // Handle on a per type basis + switch addrType[0] { + case ipv4Address: + addr := make([]byte, 4) + if _, err := io.ReadAtLeast(r, addr, len(addr)); err != nil { + return nil, err + } + d.IP = net.IP(addr) + + case ipv6Address: + addr := make([]byte, 16) + if _, err := io.ReadAtLeast(r, addr, len(addr)); err != nil { + return nil, err + } + d.IP = net.IP(addr) + + case fqdnAddress: + if _, err := r.Read(addrType); err != nil { + return nil, err + } + addrLen := int(addrType[0]) + fqdn := make([]byte, addrLen) + if _, err := io.ReadAtLeast(r, fqdn, addrLen); err != nil { + return nil, err + } + d.FQDN = string(fqdn) + + default: + return nil, unrecognizedAddrType + } + + // Read the port + port := []byte{0, 0} + if _, err := io.ReadAtLeast(r, port, 2); err != nil { + return nil, err + } + d.Port = (int(port[0]) << 8) | int(port[1]) + + return d, nil +} + +// sendReply is used to send a reply message +func sendReply(w io.Writer, resp uint8, addr *AddrSpec) error { + // Format the address + var addrType uint8 + var addrBody []byte + var addrPort uint16 + switch { + case addr == nil: + addrType = ipv4Address + addrBody = []byte{0, 0, 0, 0} + addrPort = 0 + + case addr.FQDN != "": + addrType = fqdnAddress + addrBody = append([]byte{byte(len(addr.FQDN))}, addr.FQDN...) + addrPort = uint16(addr.Port) + + case addr.IP.To4() != nil: + addrType = ipv4Address + addrBody = []byte(addr.IP.To4()) + addrPort = uint16(addr.Port) + + case addr.IP.To16() != nil: + addrType = ipv6Address + addrBody = []byte(addr.IP.To16()) + addrPort = uint16(addr.Port) + + default: + return fmt.Errorf("Failed to format address: %v", addr) + } + + // Format the message + msg := make([]byte, 6+len(addrBody)) + msg[0] = socks5Version + msg[1] = resp + msg[2] = 0 // Reserved + msg[3] = addrType + copy(msg[4:], addrBody) + msg[4+len(addrBody)] = byte(addrPort >> 8) + msg[4+len(addrBody)+1] = byte(addrPort & 0xff) + + // Send the message + _, err := w.Write(msg) + return err +} + +type closeWriter interface { + CloseWrite() error +} + +// proxy is used to suffle data from src to destination, and sends errors +// down a dedicated channel +func proxy(dst io.Writer, src io.Reader, errCh chan error) { + _, err := io.Copy(dst, src) + if tcpConn, ok := dst.(closeWriter); ok { + tcpConn.CloseWrite() + } + errCh <- err +} diff --git a/vendor/github.com/armon/go-socks5/resolver.go b/vendor/github.com/armon/go-socks5/resolver.go new file mode 100644 index 0000000..b75a5c4 --- /dev/null +++ b/vendor/github.com/armon/go-socks5/resolver.go @@ -0,0 +1,23 @@ +package socks5 + +import ( + "net" + + "golang.org/x/net/context" +) + +// NameResolver is used to implement custom name resolution +type NameResolver interface { + Resolve(ctx context.Context, name string) (context.Context, net.IP, error) +} + +// DNSResolver uses the system DNS to resolve host names +type DNSResolver struct{} + +func (d DNSResolver) Resolve(ctx context.Context, name string) (context.Context, net.IP, error) { + addr, err := net.ResolveIPAddr("ip", name) + if err != nil { + return ctx, nil, err + } + return ctx, addr.IP, err +} diff --git a/vendor/github.com/armon/go-socks5/ruleset.go b/vendor/github.com/armon/go-socks5/ruleset.go new file mode 100644 index 0000000..ba0e353 --- /dev/null +++ b/vendor/github.com/armon/go-socks5/ruleset.go @@ -0,0 +1,41 @@ +package socks5 + +import ( + "golang.org/x/net/context" +) + +// RuleSet is used to provide custom rules to allow or prohibit actions +type RuleSet interface { + Allow(ctx context.Context, req *Request) (context.Context, bool) +} + +// PermitAll returns a RuleSet which allows all types of connections +func PermitAll() RuleSet { + return &PermitCommand{true, true, true} +} + +// PermitNone returns a RuleSet which disallows all types of connections +func PermitNone() RuleSet { + return &PermitCommand{false, false, false} +} + +// PermitCommand is an implementation of the RuleSet which +// enables filtering supported commands +type PermitCommand struct { + EnableConnect bool + EnableBind bool + EnableAssociate bool +} + +func (p *PermitCommand) Allow(ctx context.Context, req *Request) (context.Context, bool) { + switch req.Command { + case ConnectCommand: + return ctx, p.EnableConnect + case BindCommand: + return ctx, p.EnableBind + case AssociateCommand: + return ctx, p.EnableAssociate + } + + return ctx, false +} diff --git a/vendor/github.com/armon/go-socks5/socks5.go b/vendor/github.com/armon/go-socks5/socks5.go new file mode 100644 index 0000000..a17be68 --- /dev/null +++ b/vendor/github.com/armon/go-socks5/socks5.go @@ -0,0 +1,169 @@ +package socks5 + +import ( + "bufio" + "fmt" + "log" + "net" + "os" + + "golang.org/x/net/context" +) + +const ( + socks5Version = uint8(5) +) + +// Config is used to setup and configure a Server +type Config struct { + // AuthMethods can be provided to implement custom authentication + // By default, "auth-less" mode is enabled. + // For password-based auth use UserPassAuthenticator. + AuthMethods []Authenticator + + // If provided, username/password authentication is enabled, + // by appending a UserPassAuthenticator to AuthMethods. If not provided, + // and AUthMethods is nil, then "auth-less" mode is enabled. + Credentials CredentialStore + + // Resolver can be provided to do custom name resolution. + // Defaults to DNSResolver if not provided. + Resolver NameResolver + + // Rules is provided to enable custom logic around permitting + // various commands. If not provided, PermitAll is used. + Rules RuleSet + + // Rewriter can be used to transparently rewrite addresses. + // This is invoked before the RuleSet is invoked. + // Defaults to NoRewrite. + Rewriter AddressRewriter + + // BindIP is used for bind or udp associate + BindIP net.IP + + // Logger can be used to provide a custom log target. + // Defaults to stdout. + Logger *log.Logger + + // Optional function for dialing out + Dial func(ctx context.Context, network, addr string) (net.Conn, error) +} + +// Server is reponsible for accepting connections and handling +// the details of the SOCKS5 protocol +type Server struct { + config *Config + authMethods map[uint8]Authenticator +} + +// New creates a new Server and potentially returns an error +func New(conf *Config) (*Server, error) { + // Ensure we have at least one authentication method enabled + if len(conf.AuthMethods) == 0 { + if conf.Credentials != nil { + conf.AuthMethods = []Authenticator{&UserPassAuthenticator{conf.Credentials}} + } else { + conf.AuthMethods = []Authenticator{&NoAuthAuthenticator{}} + } + } + + // Ensure we have a DNS resolver + if conf.Resolver == nil { + conf.Resolver = DNSResolver{} + } + + // Ensure we have a rule set + if conf.Rules == nil { + conf.Rules = PermitAll() + } + + // Ensure we have a log target + if conf.Logger == nil { + conf.Logger = log.New(os.Stdout, "", log.LstdFlags) + } + + server := &Server{ + config: conf, + } + + server.authMethods = make(map[uint8]Authenticator) + + for _, a := range conf.AuthMethods { + server.authMethods[a.GetCode()] = a + } + + return server, nil +} + +// ListenAndServe is used to create a listener and serve on it +func (s *Server) ListenAndServe(network, addr string) error { + l, err := net.Listen(network, addr) + if err != nil { + return err + } + return s.Serve(l) +} + +// Serve is used to serve connections from a listener +func (s *Server) Serve(l net.Listener) error { + for { + conn, err := l.Accept() + if err != nil { + return err + } + go s.ServeConn(conn) + } + return nil +} + +// ServeConn is used to serve a single connection. +func (s *Server) ServeConn(conn net.Conn) error { + defer conn.Close() + bufConn := bufio.NewReader(conn) + + // Read the version byte + version := []byte{0} + if _, err := bufConn.Read(version); err != nil { + s.config.Logger.Printf("[ERR] socks: Failed to get version byte: %v", err) + return err + } + + // Ensure we are compatible + if version[0] != socks5Version { + err := fmt.Errorf("Unsupported SOCKS version: %v", version) + s.config.Logger.Printf("[ERR] socks: %v", err) + return err + } + + // Authenticate the connection + authContext, err := s.authenticate(conn, bufConn) + if err != nil { + err = fmt.Errorf("Failed to authenticate: %v", err) + s.config.Logger.Printf("[ERR] socks: %v", err) + return err + } + + request, err := NewRequest(bufConn) + if err != nil { + if err == unrecognizedAddrType { + if err := sendReply(conn, addrTypeNotSupported, nil); err != nil { + return fmt.Errorf("Failed to send reply: %v", err) + } + } + return fmt.Errorf("Failed to read destination address: %v", err) + } + request.AuthContext = authContext + if client, ok := conn.RemoteAddr().(*net.TCPAddr); ok { + request.RemoteAddr = &AddrSpec{IP: client.IP, Port: client.Port} + } + + // Process the client request + if err := s.handleRequest(request, conn); err != nil { + err = fmt.Errorf("Failed to handle request: %v", err) + s.config.Logger.Printf("[ERR] socks: %v", err) + return err + } + + return nil +} diff --git a/vendor/github.com/golang/snappy/AUTHORS b/vendor/github.com/golang/snappy/AUTHORS new file mode 100644 index 0000000..bcfa195 --- /dev/null +++ b/vendor/github.com/golang/snappy/AUTHORS @@ -0,0 +1,15 @@ +# This is the official list of Snappy-Go authors for copyright purposes. +# This file is distinct from the CONTRIBUTORS files. +# See the latter for an explanation. + +# Names should be added to this file as +# Name or Organization +# The email address is not required for organizations. + +# Please keep the list sorted. + +Damian Gryski +Google Inc. +Jan Mercl <0xjnml@gmail.com> +Rodolfo Carvalho +Sebastien Binet diff --git a/vendor/github.com/golang/snappy/CONTRIBUTORS b/vendor/github.com/golang/snappy/CONTRIBUTORS new file mode 100644 index 0000000..931ae31 --- /dev/null +++ b/vendor/github.com/golang/snappy/CONTRIBUTORS @@ -0,0 +1,37 @@ +# This is the official list of people who can contribute +# (and typically have contributed) code to the Snappy-Go repository. +# The AUTHORS file lists the copyright holders; this file +# lists people. For example, Google employees are listed here +# but not in AUTHORS, because Google holds the copyright. +# +# The submission process automatically checks to make sure +# that people submitting code are listed in this file (by email address). +# +# Names should be added to this file only after verifying that +# the individual or the individual's organization has agreed to +# the appropriate Contributor License Agreement, found here: +# +# http://code.google.com/legal/individual-cla-v1.0.html +# http://code.google.com/legal/corporate-cla-v1.0.html +# +# The agreement for individuals can be filled out on the web. +# +# When adding J Random Contributor's name to this file, +# either J's name or J's organization's name should be +# added to the AUTHORS file, depending on whether the +# individual or corporate CLA was used. + +# Names should be added to this file like so: +# Name + +# Please keep the list sorted. + +Damian Gryski +Jan Mercl <0xjnml@gmail.com> +Kai Backman +Marc-Antoine Ruel +Nigel Tao +Rob Pike +Rodolfo Carvalho +Russ Cox +Sebastien Binet diff --git a/vendor/github.com/golang/snappy/LICENSE b/vendor/github.com/golang/snappy/LICENSE new file mode 100644 index 0000000..6050c10 --- /dev/null +++ b/vendor/github.com/golang/snappy/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2011 The Snappy-Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/github.com/golang/snappy/README b/vendor/github.com/golang/snappy/README new file mode 100644 index 0000000..cea1287 --- /dev/null +++ b/vendor/github.com/golang/snappy/README @@ -0,0 +1,107 @@ +The Snappy compression format in the Go programming language. + +To download and install from source: +$ go get github.com/golang/snappy + +Unless otherwise noted, the Snappy-Go source files are distributed +under the BSD-style license found in the LICENSE file. + + + +Benchmarks. + +The golang/snappy benchmarks include compressing (Z) and decompressing (U) ten +or so files, the same set used by the C++ Snappy code (github.com/google/snappy +and note the "google", not "golang"). On an "Intel(R) Core(TM) i7-3770 CPU @ +3.40GHz", Go's GOARCH=amd64 numbers as of 2016-05-29: + +"go test -test.bench=." + +_UFlat0-8 2.19GB/s ± 0% html +_UFlat1-8 1.41GB/s ± 0% urls +_UFlat2-8 23.5GB/s ± 2% jpg +_UFlat3-8 1.91GB/s ± 0% jpg_200 +_UFlat4-8 14.0GB/s ± 1% pdf +_UFlat5-8 1.97GB/s ± 0% html4 +_UFlat6-8 814MB/s ± 0% txt1 +_UFlat7-8 785MB/s ± 0% txt2 +_UFlat8-8 857MB/s ± 0% txt3 +_UFlat9-8 719MB/s ± 1% txt4 +_UFlat10-8 2.84GB/s ± 0% pb +_UFlat11-8 1.05GB/s ± 0% gaviota + +_ZFlat0-8 1.04GB/s ± 0% html +_ZFlat1-8 534MB/s ± 0% urls +_ZFlat2-8 15.7GB/s ± 1% jpg +_ZFlat3-8 740MB/s ± 3% jpg_200 +_ZFlat4-8 9.20GB/s ± 1% pdf +_ZFlat5-8 991MB/s ± 0% html4 +_ZFlat6-8 379MB/s ± 0% txt1 +_ZFlat7-8 352MB/s ± 0% txt2 +_ZFlat8-8 396MB/s ± 1% txt3 +_ZFlat9-8 327MB/s ± 1% txt4 +_ZFlat10-8 1.33GB/s ± 1% pb +_ZFlat11-8 605MB/s ± 1% gaviota + + + +"go test -test.bench=. -tags=noasm" + +_UFlat0-8 621MB/s ± 2% html +_UFlat1-8 494MB/s ± 1% urls +_UFlat2-8 23.2GB/s ± 1% jpg +_UFlat3-8 1.12GB/s ± 1% jpg_200 +_UFlat4-8 4.35GB/s ± 1% pdf +_UFlat5-8 609MB/s ± 0% html4 +_UFlat6-8 296MB/s ± 0% txt1 +_UFlat7-8 288MB/s ± 0% txt2 +_UFlat8-8 309MB/s ± 1% txt3 +_UFlat9-8 280MB/s ± 1% txt4 +_UFlat10-8 753MB/s ± 0% pb +_UFlat11-8 400MB/s ± 0% gaviota + +_ZFlat0-8 409MB/s ± 1% html +_ZFlat1-8 250MB/s ± 1% urls +_ZFlat2-8 12.3GB/s ± 1% jpg +_ZFlat3-8 132MB/s ± 0% jpg_200 +_ZFlat4-8 2.92GB/s ± 0% pdf +_ZFlat5-8 405MB/s ± 1% html4 +_ZFlat6-8 179MB/s ± 1% txt1 +_ZFlat7-8 170MB/s ± 1% txt2 +_ZFlat8-8 189MB/s ± 1% txt3 +_ZFlat9-8 164MB/s ± 1% txt4 +_ZFlat10-8 479MB/s ± 1% pb +_ZFlat11-8 270MB/s ± 1% gaviota + + + +For comparison (Go's encoded output is byte-for-byte identical to C++'s), here +are the numbers from C++ Snappy's + +make CXXFLAGS="-O2 -DNDEBUG -g" clean snappy_unittest.log && cat snappy_unittest.log + +BM_UFlat/0 2.4GB/s html +BM_UFlat/1 1.4GB/s urls +BM_UFlat/2 21.8GB/s jpg +BM_UFlat/3 1.5GB/s jpg_200 +BM_UFlat/4 13.3GB/s pdf +BM_UFlat/5 2.1GB/s html4 +BM_UFlat/6 1.0GB/s txt1 +BM_UFlat/7 959.4MB/s txt2 +BM_UFlat/8 1.0GB/s txt3 +BM_UFlat/9 864.5MB/s txt4 +BM_UFlat/10 2.9GB/s pb +BM_UFlat/11 1.2GB/s gaviota + +BM_ZFlat/0 944.3MB/s html (22.31 %) +BM_ZFlat/1 501.6MB/s urls (47.78 %) +BM_ZFlat/2 14.3GB/s jpg (99.95 %) +BM_ZFlat/3 538.3MB/s jpg_200 (73.00 %) +BM_ZFlat/4 8.3GB/s pdf (83.30 %) +BM_ZFlat/5 903.5MB/s html4 (22.52 %) +BM_ZFlat/6 336.0MB/s txt1 (57.88 %) +BM_ZFlat/7 312.3MB/s txt2 (61.91 %) +BM_ZFlat/8 353.1MB/s txt3 (54.99 %) +BM_ZFlat/9 289.9MB/s txt4 (66.26 %) +BM_ZFlat/10 1.2GB/s pb (19.68 %) +BM_ZFlat/11 527.4MB/s gaviota (37.72 %) diff --git a/vendor/github.com/golang/snappy/decode.go b/vendor/github.com/golang/snappy/decode.go new file mode 100644 index 0000000..72efb03 --- /dev/null +++ b/vendor/github.com/golang/snappy/decode.go @@ -0,0 +1,237 @@ +// Copyright 2011 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package snappy + +import ( + "encoding/binary" + "errors" + "io" +) + +var ( + // ErrCorrupt reports that the input is invalid. + ErrCorrupt = errors.New("snappy: corrupt input") + // ErrTooLarge reports that the uncompressed length is too large. + ErrTooLarge = errors.New("snappy: decoded block is too large") + // ErrUnsupported reports that the input isn't supported. + ErrUnsupported = errors.New("snappy: unsupported input") + + errUnsupportedLiteralLength = errors.New("snappy: unsupported literal length") +) + +// DecodedLen returns the length of the decoded block. +func DecodedLen(src []byte) (int, error) { + v, _, err := decodedLen(src) + return v, err +} + +// decodedLen returns the length of the decoded block and the number of bytes +// that the length header occupied. +func decodedLen(src []byte) (blockLen, headerLen int, err error) { + v, n := binary.Uvarint(src) + if n <= 0 || v > 0xffffffff { + return 0, 0, ErrCorrupt + } + + const wordSize = 32 << (^uint(0) >> 32 & 1) + if wordSize == 32 && v > 0x7fffffff { + return 0, 0, ErrTooLarge + } + return int(v), n, nil +} + +const ( + decodeErrCodeCorrupt = 1 + decodeErrCodeUnsupportedLiteralLength = 2 +) + +// Decode returns the decoded form of src. The returned slice may be a sub- +// slice of dst if dst was large enough to hold the entire decoded block. +// Otherwise, a newly allocated slice will be returned. +// +// The dst and src must not overlap. It is valid to pass a nil dst. +func Decode(dst, src []byte) ([]byte, error) { + dLen, s, err := decodedLen(src) + if err != nil { + return nil, err + } + if dLen <= len(dst) { + dst = dst[:dLen] + } else { + dst = make([]byte, dLen) + } + switch decode(dst, src[s:]) { + case 0: + return dst, nil + case decodeErrCodeUnsupportedLiteralLength: + return nil, errUnsupportedLiteralLength + } + return nil, ErrCorrupt +} + +// NewReader returns a new Reader that decompresses from r, using the framing +// format described at +// https://github.com/google/snappy/blob/master/framing_format.txt +func NewReader(r io.Reader) *Reader { + return &Reader{ + r: r, + decoded: make([]byte, maxBlockSize), + buf: make([]byte, maxEncodedLenOfMaxBlockSize+checksumSize), + } +} + +// Reader is an io.Reader that can read Snappy-compressed bytes. +type Reader struct { + r io.Reader + err error + decoded []byte + buf []byte + // decoded[i:j] contains decoded bytes that have not yet been passed on. + i, j int + readHeader bool +} + +// Reset discards any buffered data, resets all state, and switches the Snappy +// reader to read from r. This permits reusing a Reader rather than allocating +// a new one. +func (r *Reader) Reset(reader io.Reader) { + r.r = reader + r.err = nil + r.i = 0 + r.j = 0 + r.readHeader = false +} + +func (r *Reader) readFull(p []byte, allowEOF bool) (ok bool) { + if _, r.err = io.ReadFull(r.r, p); r.err != nil { + if r.err == io.ErrUnexpectedEOF || (r.err == io.EOF && !allowEOF) { + r.err = ErrCorrupt + } + return false + } + return true +} + +// Read satisfies the io.Reader interface. +func (r *Reader) Read(p []byte) (int, error) { + if r.err != nil { + return 0, r.err + } + for { + if r.i < r.j { + n := copy(p, r.decoded[r.i:r.j]) + r.i += n + return n, nil + } + if !r.readFull(r.buf[:4], true) { + return 0, r.err + } + chunkType := r.buf[0] + if !r.readHeader { + if chunkType != chunkTypeStreamIdentifier { + r.err = ErrCorrupt + return 0, r.err + } + r.readHeader = true + } + chunkLen := int(r.buf[1]) | int(r.buf[2])<<8 | int(r.buf[3])<<16 + if chunkLen > len(r.buf) { + r.err = ErrUnsupported + return 0, r.err + } + + // The chunk types are specified at + // https://github.com/google/snappy/blob/master/framing_format.txt + switch chunkType { + case chunkTypeCompressedData: + // Section 4.2. Compressed data (chunk type 0x00). + if chunkLen < checksumSize { + r.err = ErrCorrupt + return 0, r.err + } + buf := r.buf[:chunkLen] + if !r.readFull(buf, false) { + return 0, r.err + } + checksum := uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24 + buf = buf[checksumSize:] + + n, err := DecodedLen(buf) + if err != nil { + r.err = err + return 0, r.err + } + if n > len(r.decoded) { + r.err = ErrCorrupt + return 0, r.err + } + if _, err := Decode(r.decoded, buf); err != nil { + r.err = err + return 0, r.err + } + if crc(r.decoded[:n]) != checksum { + r.err = ErrCorrupt + return 0, r.err + } + r.i, r.j = 0, n + continue + + case chunkTypeUncompressedData: + // Section 4.3. Uncompressed data (chunk type 0x01). + if chunkLen < checksumSize { + r.err = ErrCorrupt + return 0, r.err + } + buf := r.buf[:checksumSize] + if !r.readFull(buf, false) { + return 0, r.err + } + checksum := uint32(buf[0]) | uint32(buf[1])<<8 | uint32(buf[2])<<16 | uint32(buf[3])<<24 + // Read directly into r.decoded instead of via r.buf. + n := chunkLen - checksumSize + if n > len(r.decoded) { + r.err = ErrCorrupt + return 0, r.err + } + if !r.readFull(r.decoded[:n], false) { + return 0, r.err + } + if crc(r.decoded[:n]) != checksum { + r.err = ErrCorrupt + return 0, r.err + } + r.i, r.j = 0, n + continue + + case chunkTypeStreamIdentifier: + // Section 4.1. Stream identifier (chunk type 0xff). + if chunkLen != len(magicBody) { + r.err = ErrCorrupt + return 0, r.err + } + if !r.readFull(r.buf[:len(magicBody)], false) { + return 0, r.err + } + for i := 0; i < len(magicBody); i++ { + if r.buf[i] != magicBody[i] { + r.err = ErrCorrupt + return 0, r.err + } + } + continue + } + + if chunkType <= 0x7f { + // Section 4.5. Reserved unskippable chunks (chunk types 0x02-0x7f). + r.err = ErrUnsupported + return 0, r.err + } + // Section 4.4 Padding (chunk type 0xfe). + // Section 4.6. Reserved skippable chunks (chunk types 0x80-0xfd). + if !r.readFull(r.buf[:chunkLen], false) { + return 0, r.err + } + } +} diff --git a/vendor/github.com/golang/snappy/decode_amd64.go b/vendor/github.com/golang/snappy/decode_amd64.go new file mode 100644 index 0000000..fcd192b --- /dev/null +++ b/vendor/github.com/golang/snappy/decode_amd64.go @@ -0,0 +1,14 @@ +// Copyright 2016 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !appengine +// +build gc +// +build !noasm + +package snappy + +// decode has the same semantics as in decode_other.go. +// +//go:noescape +func decode(dst, src []byte) int diff --git a/vendor/github.com/golang/snappy/decode_amd64.s b/vendor/github.com/golang/snappy/decode_amd64.s new file mode 100644 index 0000000..e6179f6 --- /dev/null +++ b/vendor/github.com/golang/snappy/decode_amd64.s @@ -0,0 +1,490 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !appengine +// +build gc +// +build !noasm + +#include "textflag.h" + +// The asm code generally follows the pure Go code in decode_other.go, except +// where marked with a "!!!". + +// func decode(dst, src []byte) int +// +// All local variables fit into registers. The non-zero stack size is only to +// spill registers and push args when issuing a CALL. The register allocation: +// - AX scratch +// - BX scratch +// - CX length or x +// - DX offset +// - SI &src[s] +// - DI &dst[d] +// + R8 dst_base +// + R9 dst_len +// + R10 dst_base + dst_len +// + R11 src_base +// + R12 src_len +// + R13 src_base + src_len +// - R14 used by doCopy +// - R15 used by doCopy +// +// The registers R8-R13 (marked with a "+") are set at the start of the +// function, and after a CALL returns, and are not otherwise modified. +// +// The d variable is implicitly DI - R8, and len(dst)-d is R10 - DI. +// The s variable is implicitly SI - R11, and len(src)-s is R13 - SI. +TEXT ·decode(SB), NOSPLIT, $48-56 + // Initialize SI, DI and R8-R13. + MOVQ dst_base+0(FP), R8 + MOVQ dst_len+8(FP), R9 + MOVQ R8, DI + MOVQ R8, R10 + ADDQ R9, R10 + MOVQ src_base+24(FP), R11 + MOVQ src_len+32(FP), R12 + MOVQ R11, SI + MOVQ R11, R13 + ADDQ R12, R13 + +loop: + // for s < len(src) + CMPQ SI, R13 + JEQ end + + // CX = uint32(src[s]) + // + // switch src[s] & 0x03 + MOVBLZX (SI), CX + MOVL CX, BX + ANDL $3, BX + CMPL BX, $1 + JAE tagCopy + + // ---------------------------------------- + // The code below handles literal tags. + + // case tagLiteral: + // x := uint32(src[s] >> 2) + // switch + SHRL $2, CX + CMPL CX, $60 + JAE tagLit60Plus + + // case x < 60: + // s++ + INCQ SI + +doLit: + // This is the end of the inner "switch", when we have a literal tag. + // + // We assume that CX == x and x fits in a uint32, where x is the variable + // used in the pure Go decode_other.go code. + + // length = int(x) + 1 + // + // Unlike the pure Go code, we don't need to check if length <= 0 because + // CX can hold 64 bits, so the increment cannot overflow. + INCQ CX + + // Prepare to check if copying length bytes will run past the end of dst or + // src. + // + // AX = len(dst) - d + // BX = len(src) - s + MOVQ R10, AX + SUBQ DI, AX + MOVQ R13, BX + SUBQ SI, BX + + // !!! Try a faster technique for short (16 or fewer bytes) copies. + // + // if length > 16 || len(dst)-d < 16 || len(src)-s < 16 { + // goto callMemmove // Fall back on calling runtime·memmove. + // } + // + // The C++ snappy code calls this TryFastAppend. It also checks len(src)-s + // against 21 instead of 16, because it cannot assume that all of its input + // is contiguous in memory and so it needs to leave enough source bytes to + // read the next tag without refilling buffers, but Go's Decode assumes + // contiguousness (the src argument is a []byte). + CMPQ CX, $16 + JGT callMemmove + CMPQ AX, $16 + JLT callMemmove + CMPQ BX, $16 + JLT callMemmove + + // !!! Implement the copy from src to dst as a 16-byte load and store. + // (Decode's documentation says that dst and src must not overlap.) + // + // This always copies 16 bytes, instead of only length bytes, but that's + // OK. If the input is a valid Snappy encoding then subsequent iterations + // will fix up the overrun. Otherwise, Decode returns a nil []byte (and a + // non-nil error), so the overrun will be ignored. + // + // Note that on amd64, it is legal and cheap to issue unaligned 8-byte or + // 16-byte loads and stores. This technique probably wouldn't be as + // effective on architectures that are fussier about alignment. + MOVOU 0(SI), X0 + MOVOU X0, 0(DI) + + // d += length + // s += length + ADDQ CX, DI + ADDQ CX, SI + JMP loop + +callMemmove: + // if length > len(dst)-d || length > len(src)-s { etc } + CMPQ CX, AX + JGT errCorrupt + CMPQ CX, BX + JGT errCorrupt + + // copy(dst[d:], src[s:s+length]) + // + // This means calling runtime·memmove(&dst[d], &src[s], length), so we push + // DI, SI and CX as arguments. Coincidentally, we also need to spill those + // three registers to the stack, to save local variables across the CALL. + MOVQ DI, 0(SP) + MOVQ SI, 8(SP) + MOVQ CX, 16(SP) + MOVQ DI, 24(SP) + MOVQ SI, 32(SP) + MOVQ CX, 40(SP) + CALL runtime·memmove(SB) + + // Restore local variables: unspill registers from the stack and + // re-calculate R8-R13. + MOVQ 24(SP), DI + MOVQ 32(SP), SI + MOVQ 40(SP), CX + MOVQ dst_base+0(FP), R8 + MOVQ dst_len+8(FP), R9 + MOVQ R8, R10 + ADDQ R9, R10 + MOVQ src_base+24(FP), R11 + MOVQ src_len+32(FP), R12 + MOVQ R11, R13 + ADDQ R12, R13 + + // d += length + // s += length + ADDQ CX, DI + ADDQ CX, SI + JMP loop + +tagLit60Plus: + // !!! This fragment does the + // + // s += x - 58; if uint(s) > uint(len(src)) { etc } + // + // checks. In the asm version, we code it once instead of once per switch case. + ADDQ CX, SI + SUBQ $58, SI + MOVQ SI, BX + SUBQ R11, BX + CMPQ BX, R12 + JA errCorrupt + + // case x == 60: + CMPL CX, $61 + JEQ tagLit61 + JA tagLit62Plus + + // x = uint32(src[s-1]) + MOVBLZX -1(SI), CX + JMP doLit + +tagLit61: + // case x == 61: + // x = uint32(src[s-2]) | uint32(src[s-1])<<8 + MOVWLZX -2(SI), CX + JMP doLit + +tagLit62Plus: + CMPL CX, $62 + JA tagLit63 + + // case x == 62: + // x = uint32(src[s-3]) | uint32(src[s-2])<<8 | uint32(src[s-1])<<16 + MOVWLZX -3(SI), CX + MOVBLZX -1(SI), BX + SHLL $16, BX + ORL BX, CX + JMP doLit + +tagLit63: + // case x == 63: + // x = uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24 + MOVL -4(SI), CX + JMP doLit + +// The code above handles literal tags. +// ---------------------------------------- +// The code below handles copy tags. + +tagCopy4: + // case tagCopy4: + // s += 5 + ADDQ $5, SI + + // if uint(s) > uint(len(src)) { etc } + MOVQ SI, BX + SUBQ R11, BX + CMPQ BX, R12 + JA errCorrupt + + // length = 1 + int(src[s-5])>>2 + SHRQ $2, CX + INCQ CX + + // offset = int(uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24) + MOVLQZX -4(SI), DX + JMP doCopy + +tagCopy2: + // case tagCopy2: + // s += 3 + ADDQ $3, SI + + // if uint(s) > uint(len(src)) { etc } + MOVQ SI, BX + SUBQ R11, BX + CMPQ BX, R12 + JA errCorrupt + + // length = 1 + int(src[s-3])>>2 + SHRQ $2, CX + INCQ CX + + // offset = int(uint32(src[s-2]) | uint32(src[s-1])<<8) + MOVWQZX -2(SI), DX + JMP doCopy + +tagCopy: + // We have a copy tag. We assume that: + // - BX == src[s] & 0x03 + // - CX == src[s] + CMPQ BX, $2 + JEQ tagCopy2 + JA tagCopy4 + + // case tagCopy1: + // s += 2 + ADDQ $2, SI + + // if uint(s) > uint(len(src)) { etc } + MOVQ SI, BX + SUBQ R11, BX + CMPQ BX, R12 + JA errCorrupt + + // offset = int(uint32(src[s-2])&0xe0<<3 | uint32(src[s-1])) + MOVQ CX, DX + ANDQ $0xe0, DX + SHLQ $3, DX + MOVBQZX -1(SI), BX + ORQ BX, DX + + // length = 4 + int(src[s-2])>>2&0x7 + SHRQ $2, CX + ANDQ $7, CX + ADDQ $4, CX + +doCopy: + // This is the end of the outer "switch", when we have a copy tag. + // + // We assume that: + // - CX == length && CX > 0 + // - DX == offset + + // if offset <= 0 { etc } + CMPQ DX, $0 + JLE errCorrupt + + // if d < offset { etc } + MOVQ DI, BX + SUBQ R8, BX + CMPQ BX, DX + JLT errCorrupt + + // if length > len(dst)-d { etc } + MOVQ R10, BX + SUBQ DI, BX + CMPQ CX, BX + JGT errCorrupt + + // forwardCopy(dst[d:d+length], dst[d-offset:]); d += length + // + // Set: + // - R14 = len(dst)-d + // - R15 = &dst[d-offset] + MOVQ R10, R14 + SUBQ DI, R14 + MOVQ DI, R15 + SUBQ DX, R15 + + // !!! Try a faster technique for short (16 or fewer bytes) forward copies. + // + // First, try using two 8-byte load/stores, similar to the doLit technique + // above. Even if dst[d:d+length] and dst[d-offset:] can overlap, this is + // still OK if offset >= 8. Note that this has to be two 8-byte load/stores + // and not one 16-byte load/store, and the first store has to be before the + // second load, due to the overlap if offset is in the range [8, 16). + // + // if length > 16 || offset < 8 || len(dst)-d < 16 { + // goto slowForwardCopy + // } + // copy 16 bytes + // d += length + CMPQ CX, $16 + JGT slowForwardCopy + CMPQ DX, $8 + JLT slowForwardCopy + CMPQ R14, $16 + JLT slowForwardCopy + MOVQ 0(R15), AX + MOVQ AX, 0(DI) + MOVQ 8(R15), BX + MOVQ BX, 8(DI) + ADDQ CX, DI + JMP loop + +slowForwardCopy: + // !!! If the forward copy is longer than 16 bytes, or if offset < 8, we + // can still try 8-byte load stores, provided we can overrun up to 10 extra + // bytes. As above, the overrun will be fixed up by subsequent iterations + // of the outermost loop. + // + // The C++ snappy code calls this technique IncrementalCopyFastPath. Its + // commentary says: + // + // ---- + // + // The main part of this loop is a simple copy of eight bytes at a time + // until we've copied (at least) the requested amount of bytes. However, + // if d and d-offset are less than eight bytes apart (indicating a + // repeating pattern of length < 8), we first need to expand the pattern in + // order to get the correct results. For instance, if the buffer looks like + // this, with the eight-byte and patterns marked as + // intervals: + // + // abxxxxxxxxxxxx + // [------] d-offset + // [------] d + // + // a single eight-byte copy from to will repeat the pattern + // once, after which we can move two bytes without moving : + // + // ababxxxxxxxxxx + // [------] d-offset + // [------] d + // + // and repeat the exercise until the two no longer overlap. + // + // This allows us to do very well in the special case of one single byte + // repeated many times, without taking a big hit for more general cases. + // + // The worst case of extra writing past the end of the match occurs when + // offset == 1 and length == 1; the last copy will read from byte positions + // [0..7] and write to [4..11], whereas it was only supposed to write to + // position 1. Thus, ten excess bytes. + // + // ---- + // + // That "10 byte overrun" worst case is confirmed by Go's + // TestSlowForwardCopyOverrun, which also tests the fixUpSlowForwardCopy + // and finishSlowForwardCopy algorithm. + // + // if length > len(dst)-d-10 { + // goto verySlowForwardCopy + // } + SUBQ $10, R14 + CMPQ CX, R14 + JGT verySlowForwardCopy + +makeOffsetAtLeast8: + // !!! As above, expand the pattern so that offset >= 8 and we can use + // 8-byte load/stores. + // + // for offset < 8 { + // copy 8 bytes from dst[d-offset:] to dst[d:] + // length -= offset + // d += offset + // offset += offset + // // The two previous lines together means that d-offset, and therefore + // // R15, is unchanged. + // } + CMPQ DX, $8 + JGE fixUpSlowForwardCopy + MOVQ (R15), BX + MOVQ BX, (DI) + SUBQ DX, CX + ADDQ DX, DI + ADDQ DX, DX + JMP makeOffsetAtLeast8 + +fixUpSlowForwardCopy: + // !!! Add length (which might be negative now) to d (implied by DI being + // &dst[d]) so that d ends up at the right place when we jump back to the + // top of the loop. Before we do that, though, we save DI to AX so that, if + // length is positive, copying the remaining length bytes will write to the + // right place. + MOVQ DI, AX + ADDQ CX, DI + +finishSlowForwardCopy: + // !!! Repeat 8-byte load/stores until length <= 0. Ending with a negative + // length means that we overrun, but as above, that will be fixed up by + // subsequent iterations of the outermost loop. + CMPQ CX, $0 + JLE loop + MOVQ (R15), BX + MOVQ BX, (AX) + ADDQ $8, R15 + ADDQ $8, AX + SUBQ $8, CX + JMP finishSlowForwardCopy + +verySlowForwardCopy: + // verySlowForwardCopy is a simple implementation of forward copy. In C + // parlance, this is a do/while loop instead of a while loop, since we know + // that length > 0. In Go syntax: + // + // for { + // dst[d] = dst[d - offset] + // d++ + // length-- + // if length == 0 { + // break + // } + // } + MOVB (R15), BX + MOVB BX, (DI) + INCQ R15 + INCQ DI + DECQ CX + JNZ verySlowForwardCopy + JMP loop + +// The code above handles copy tags. +// ---------------------------------------- + +end: + // This is the end of the "for s < len(src)". + // + // if d != len(dst) { etc } + CMPQ DI, R10 + JNE errCorrupt + + // return 0 + MOVQ $0, ret+48(FP) + RET + +errCorrupt: + // return decodeErrCodeCorrupt + MOVQ $1, ret+48(FP) + RET diff --git a/vendor/github.com/golang/snappy/decode_other.go b/vendor/github.com/golang/snappy/decode_other.go new file mode 100644 index 0000000..8c9f204 --- /dev/null +++ b/vendor/github.com/golang/snappy/decode_other.go @@ -0,0 +1,101 @@ +// Copyright 2016 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !amd64 appengine !gc noasm + +package snappy + +// decode writes the decoding of src to dst. It assumes that the varint-encoded +// length of the decompressed bytes has already been read, and that len(dst) +// equals that length. +// +// It returns 0 on success or a decodeErrCodeXxx error code on failure. +func decode(dst, src []byte) int { + var d, s, offset, length int + for s < len(src) { + switch src[s] & 0x03 { + case tagLiteral: + x := uint32(src[s] >> 2) + switch { + case x < 60: + s++ + case x == 60: + s += 2 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + x = uint32(src[s-1]) + case x == 61: + s += 3 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + x = uint32(src[s-2]) | uint32(src[s-1])<<8 + case x == 62: + s += 4 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + x = uint32(src[s-3]) | uint32(src[s-2])<<8 | uint32(src[s-1])<<16 + case x == 63: + s += 5 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + x = uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24 + } + length = int(x) + 1 + if length <= 0 { + return decodeErrCodeUnsupportedLiteralLength + } + if length > len(dst)-d || length > len(src)-s { + return decodeErrCodeCorrupt + } + copy(dst[d:], src[s:s+length]) + d += length + s += length + continue + + case tagCopy1: + s += 2 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + length = 4 + int(src[s-2])>>2&0x7 + offset = int(uint32(src[s-2])&0xe0<<3 | uint32(src[s-1])) + + case tagCopy2: + s += 3 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + length = 1 + int(src[s-3])>>2 + offset = int(uint32(src[s-2]) | uint32(src[s-1])<<8) + + case tagCopy4: + s += 5 + if uint(s) > uint(len(src)) { // The uint conversions catch overflow from the previous line. + return decodeErrCodeCorrupt + } + length = 1 + int(src[s-5])>>2 + offset = int(uint32(src[s-4]) | uint32(src[s-3])<<8 | uint32(src[s-2])<<16 | uint32(src[s-1])<<24) + } + + if offset <= 0 || d < offset || length > len(dst)-d { + return decodeErrCodeCorrupt + } + // Copy from an earlier sub-slice of dst to a later sub-slice. Unlike + // the built-in copy function, this byte-by-byte copy always runs + // forwards, even if the slices overlap. Conceptually, this is: + // + // d += forwardCopy(dst[d:d+length], dst[d-offset:]) + for end := d + length; d != end; d++ { + dst[d] = dst[d-offset] + } + } + if d != len(dst) { + return decodeErrCodeCorrupt + } + return 0 +} diff --git a/vendor/github.com/golang/snappy/encode.go b/vendor/github.com/golang/snappy/encode.go new file mode 100644 index 0000000..8d393e9 --- /dev/null +++ b/vendor/github.com/golang/snappy/encode.go @@ -0,0 +1,285 @@ +// Copyright 2011 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package snappy + +import ( + "encoding/binary" + "errors" + "io" +) + +// Encode returns the encoded form of src. The returned slice may be a sub- +// slice of dst if dst was large enough to hold the entire encoded block. +// Otherwise, a newly allocated slice will be returned. +// +// The dst and src must not overlap. It is valid to pass a nil dst. +func Encode(dst, src []byte) []byte { + if n := MaxEncodedLen(len(src)); n < 0 { + panic(ErrTooLarge) + } else if len(dst) < n { + dst = make([]byte, n) + } + + // The block starts with the varint-encoded length of the decompressed bytes. + d := binary.PutUvarint(dst, uint64(len(src))) + + for len(src) > 0 { + p := src + src = nil + if len(p) > maxBlockSize { + p, src = p[:maxBlockSize], p[maxBlockSize:] + } + if len(p) < minNonLiteralBlockSize { + d += emitLiteral(dst[d:], p) + } else { + d += encodeBlock(dst[d:], p) + } + } + return dst[:d] +} + +// inputMargin is the minimum number of extra input bytes to keep, inside +// encodeBlock's inner loop. On some architectures, this margin lets us +// implement a fast path for emitLiteral, where the copy of short (<= 16 byte) +// literals can be implemented as a single load to and store from a 16-byte +// register. That literal's actual length can be as short as 1 byte, so this +// can copy up to 15 bytes too much, but that's OK as subsequent iterations of +// the encoding loop will fix up the copy overrun, and this inputMargin ensures +// that we don't overrun the dst and src buffers. +const inputMargin = 16 - 1 + +// minNonLiteralBlockSize is the minimum size of the input to encodeBlock that +// could be encoded with a copy tag. This is the minimum with respect to the +// algorithm used by encodeBlock, not a minimum enforced by the file format. +// +// The encoded output must start with at least a 1 byte literal, as there are +// no previous bytes to copy. A minimal (1 byte) copy after that, generated +// from an emitCopy call in encodeBlock's main loop, would require at least +// another inputMargin bytes, for the reason above: we want any emitLiteral +// calls inside encodeBlock's main loop to use the fast path if possible, which +// requires being able to overrun by inputMargin bytes. Thus, +// minNonLiteralBlockSize equals 1 + 1 + inputMargin. +// +// The C++ code doesn't use this exact threshold, but it could, as discussed at +// https://groups.google.com/d/topic/snappy-compression/oGbhsdIJSJ8/discussion +// The difference between Go (2+inputMargin) and C++ (inputMargin) is purely an +// optimization. It should not affect the encoded form. This is tested by +// TestSameEncodingAsCppShortCopies. +const minNonLiteralBlockSize = 1 + 1 + inputMargin + +// MaxEncodedLen returns the maximum length of a snappy block, given its +// uncompressed length. +// +// It will return a negative value if srcLen is too large to encode. +func MaxEncodedLen(srcLen int) int { + n := uint64(srcLen) + if n > 0xffffffff { + return -1 + } + // Compressed data can be defined as: + // compressed := item* literal* + // item := literal* copy + // + // The trailing literal sequence has a space blowup of at most 62/60 + // since a literal of length 60 needs one tag byte + one extra byte + // for length information. + // + // Item blowup is trickier to measure. Suppose the "copy" op copies + // 4 bytes of data. Because of a special check in the encoding code, + // we produce a 4-byte copy only if the offset is < 65536. Therefore + // the copy op takes 3 bytes to encode, and this type of item leads + // to at most the 62/60 blowup for representing literals. + // + // Suppose the "copy" op copies 5 bytes of data. If the offset is big + // enough, it will take 5 bytes to encode the copy op. Therefore the + // worst case here is a one-byte literal followed by a five-byte copy. + // That is, 6 bytes of input turn into 7 bytes of "compressed" data. + // + // This last factor dominates the blowup, so the final estimate is: + n = 32 + n + n/6 + if n > 0xffffffff { + return -1 + } + return int(n) +} + +var errClosed = errors.New("snappy: Writer is closed") + +// NewWriter returns a new Writer that compresses to w. +// +// The Writer returned does not buffer writes. There is no need to Flush or +// Close such a Writer. +// +// Deprecated: the Writer returned is not suitable for many small writes, only +// for few large writes. Use NewBufferedWriter instead, which is efficient +// regardless of the frequency and shape of the writes, and remember to Close +// that Writer when done. +func NewWriter(w io.Writer) *Writer { + return &Writer{ + w: w, + obuf: make([]byte, obufLen), + } +} + +// NewBufferedWriter returns a new Writer that compresses to w, using the +// framing format described at +// https://github.com/google/snappy/blob/master/framing_format.txt +// +// The Writer returned buffers writes. Users must call Close to guarantee all +// data has been forwarded to the underlying io.Writer. They may also call +// Flush zero or more times before calling Close. +func NewBufferedWriter(w io.Writer) *Writer { + return &Writer{ + w: w, + ibuf: make([]byte, 0, maxBlockSize), + obuf: make([]byte, obufLen), + } +} + +// Writer is an io.Writer that can write Snappy-compressed bytes. +type Writer struct { + w io.Writer + err error + + // ibuf is a buffer for the incoming (uncompressed) bytes. + // + // Its use is optional. For backwards compatibility, Writers created by the + // NewWriter function have ibuf == nil, do not buffer incoming bytes, and + // therefore do not need to be Flush'ed or Close'd. + ibuf []byte + + // obuf is a buffer for the outgoing (compressed) bytes. + obuf []byte + + // wroteStreamHeader is whether we have written the stream header. + wroteStreamHeader bool +} + +// Reset discards the writer's state and switches the Snappy writer to write to +// w. This permits reusing a Writer rather than allocating a new one. +func (w *Writer) Reset(writer io.Writer) { + w.w = writer + w.err = nil + if w.ibuf != nil { + w.ibuf = w.ibuf[:0] + } + w.wroteStreamHeader = false +} + +// Write satisfies the io.Writer interface. +func (w *Writer) Write(p []byte) (nRet int, errRet error) { + if w.ibuf == nil { + // Do not buffer incoming bytes. This does not perform or compress well + // if the caller of Writer.Write writes many small slices. This + // behavior is therefore deprecated, but still supported for backwards + // compatibility with code that doesn't explicitly Flush or Close. + return w.write(p) + } + + // The remainder of this method is based on bufio.Writer.Write from the + // standard library. + + for len(p) > (cap(w.ibuf)-len(w.ibuf)) && w.err == nil { + var n int + if len(w.ibuf) == 0 { + // Large write, empty buffer. + // Write directly from p to avoid copy. + n, _ = w.write(p) + } else { + n = copy(w.ibuf[len(w.ibuf):cap(w.ibuf)], p) + w.ibuf = w.ibuf[:len(w.ibuf)+n] + w.Flush() + } + nRet += n + p = p[n:] + } + if w.err != nil { + return nRet, w.err + } + n := copy(w.ibuf[len(w.ibuf):cap(w.ibuf)], p) + w.ibuf = w.ibuf[:len(w.ibuf)+n] + nRet += n + return nRet, nil +} + +func (w *Writer) write(p []byte) (nRet int, errRet error) { + if w.err != nil { + return 0, w.err + } + for len(p) > 0 { + obufStart := len(magicChunk) + if !w.wroteStreamHeader { + w.wroteStreamHeader = true + copy(w.obuf, magicChunk) + obufStart = 0 + } + + var uncompressed []byte + if len(p) > maxBlockSize { + uncompressed, p = p[:maxBlockSize], p[maxBlockSize:] + } else { + uncompressed, p = p, nil + } + checksum := crc(uncompressed) + + // Compress the buffer, discarding the result if the improvement + // isn't at least 12.5%. + compressed := Encode(w.obuf[obufHeaderLen:], uncompressed) + chunkType := uint8(chunkTypeCompressedData) + chunkLen := 4 + len(compressed) + obufEnd := obufHeaderLen + len(compressed) + if len(compressed) >= len(uncompressed)-len(uncompressed)/8 { + chunkType = chunkTypeUncompressedData + chunkLen = 4 + len(uncompressed) + obufEnd = obufHeaderLen + } + + // Fill in the per-chunk header that comes before the body. + w.obuf[len(magicChunk)+0] = chunkType + w.obuf[len(magicChunk)+1] = uint8(chunkLen >> 0) + w.obuf[len(magicChunk)+2] = uint8(chunkLen >> 8) + w.obuf[len(magicChunk)+3] = uint8(chunkLen >> 16) + w.obuf[len(magicChunk)+4] = uint8(checksum >> 0) + w.obuf[len(magicChunk)+5] = uint8(checksum >> 8) + w.obuf[len(magicChunk)+6] = uint8(checksum >> 16) + w.obuf[len(magicChunk)+7] = uint8(checksum >> 24) + + if _, err := w.w.Write(w.obuf[obufStart:obufEnd]); err != nil { + w.err = err + return nRet, err + } + if chunkType == chunkTypeUncompressedData { + if _, err := w.w.Write(uncompressed); err != nil { + w.err = err + return nRet, err + } + } + nRet += len(uncompressed) + } + return nRet, nil +} + +// Flush flushes the Writer to its underlying io.Writer. +func (w *Writer) Flush() error { + if w.err != nil { + return w.err + } + if len(w.ibuf) == 0 { + return nil + } + w.write(w.ibuf) + w.ibuf = w.ibuf[:0] + return w.err +} + +// Close calls Flush and then closes the Writer. +func (w *Writer) Close() error { + w.Flush() + ret := w.err + if w.err == nil { + w.err = errClosed + } + return ret +} diff --git a/vendor/github.com/golang/snappy/encode_amd64.go b/vendor/github.com/golang/snappy/encode_amd64.go new file mode 100644 index 0000000..150d91b --- /dev/null +++ b/vendor/github.com/golang/snappy/encode_amd64.go @@ -0,0 +1,29 @@ +// Copyright 2016 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !appengine +// +build gc +// +build !noasm + +package snappy + +// emitLiteral has the same semantics as in encode_other.go. +// +//go:noescape +func emitLiteral(dst, lit []byte) int + +// emitCopy has the same semantics as in encode_other.go. +// +//go:noescape +func emitCopy(dst []byte, offset, length int) int + +// extendMatch has the same semantics as in encode_other.go. +// +//go:noescape +func extendMatch(src []byte, i, j int) int + +// encodeBlock has the same semantics as in encode_other.go. +// +//go:noescape +func encodeBlock(dst, src []byte) (d int) diff --git a/vendor/github.com/golang/snappy/encode_amd64.s b/vendor/github.com/golang/snappy/encode_amd64.s new file mode 100644 index 0000000..adfd979 --- /dev/null +++ b/vendor/github.com/golang/snappy/encode_amd64.s @@ -0,0 +1,730 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !appengine +// +build gc +// +build !noasm + +#include "textflag.h" + +// The XXX lines assemble on Go 1.4, 1.5 and 1.7, but not 1.6, due to a +// Go toolchain regression. See https://github.com/golang/go/issues/15426 and +// https://github.com/golang/snappy/issues/29 +// +// As a workaround, the package was built with a known good assembler, and +// those instructions were disassembled by "objdump -d" to yield the +// 4e 0f b7 7c 5c 78 movzwq 0x78(%rsp,%r11,2),%r15 +// style comments, in AT&T asm syntax. Note that rsp here is a physical +// register, not Go/asm's SP pseudo-register (see https://golang.org/doc/asm). +// The instructions were then encoded as "BYTE $0x.." sequences, which assemble +// fine on Go 1.6. + +// The asm code generally follows the pure Go code in encode_other.go, except +// where marked with a "!!!". + +// ---------------------------------------------------------------------------- + +// func emitLiteral(dst, lit []byte) int +// +// All local variables fit into registers. The register allocation: +// - AX len(lit) +// - BX n +// - DX return value +// - DI &dst[i] +// - R10 &lit[0] +// +// The 24 bytes of stack space is to call runtime·memmove. +// +// The unusual register allocation of local variables, such as R10 for the +// source pointer, matches the allocation used at the call site in encodeBlock, +// which makes it easier to manually inline this function. +TEXT ·emitLiteral(SB), NOSPLIT, $24-56 + MOVQ dst_base+0(FP), DI + MOVQ lit_base+24(FP), R10 + MOVQ lit_len+32(FP), AX + MOVQ AX, DX + MOVL AX, BX + SUBL $1, BX + + CMPL BX, $60 + JLT oneByte + CMPL BX, $256 + JLT twoBytes + +threeBytes: + MOVB $0xf4, 0(DI) + MOVW BX, 1(DI) + ADDQ $3, DI + ADDQ $3, DX + JMP memmove + +twoBytes: + MOVB $0xf0, 0(DI) + MOVB BX, 1(DI) + ADDQ $2, DI + ADDQ $2, DX + JMP memmove + +oneByte: + SHLB $2, BX + MOVB BX, 0(DI) + ADDQ $1, DI + ADDQ $1, DX + +memmove: + MOVQ DX, ret+48(FP) + + // copy(dst[i:], lit) + // + // This means calling runtime·memmove(&dst[i], &lit[0], len(lit)), so we push + // DI, R10 and AX as arguments. + MOVQ DI, 0(SP) + MOVQ R10, 8(SP) + MOVQ AX, 16(SP) + CALL runtime·memmove(SB) + RET + +// ---------------------------------------------------------------------------- + +// func emitCopy(dst []byte, offset, length int) int +// +// All local variables fit into registers. The register allocation: +// - AX length +// - SI &dst[0] +// - DI &dst[i] +// - R11 offset +// +// The unusual register allocation of local variables, such as R11 for the +// offset, matches the allocation used at the call site in encodeBlock, which +// makes it easier to manually inline this function. +TEXT ·emitCopy(SB), NOSPLIT, $0-48 + MOVQ dst_base+0(FP), DI + MOVQ DI, SI + MOVQ offset+24(FP), R11 + MOVQ length+32(FP), AX + +loop0: + // for length >= 68 { etc } + CMPL AX, $68 + JLT step1 + + // Emit a length 64 copy, encoded as 3 bytes. + MOVB $0xfe, 0(DI) + MOVW R11, 1(DI) + ADDQ $3, DI + SUBL $64, AX + JMP loop0 + +step1: + // if length > 64 { etc } + CMPL AX, $64 + JLE step2 + + // Emit a length 60 copy, encoded as 3 bytes. + MOVB $0xee, 0(DI) + MOVW R11, 1(DI) + ADDQ $3, DI + SUBL $60, AX + +step2: + // if length >= 12 || offset >= 2048 { goto step3 } + CMPL AX, $12 + JGE step3 + CMPL R11, $2048 + JGE step3 + + // Emit the remaining copy, encoded as 2 bytes. + MOVB R11, 1(DI) + SHRL $8, R11 + SHLB $5, R11 + SUBB $4, AX + SHLB $2, AX + ORB AX, R11 + ORB $1, R11 + MOVB R11, 0(DI) + ADDQ $2, DI + + // Return the number of bytes written. + SUBQ SI, DI + MOVQ DI, ret+40(FP) + RET + +step3: + // Emit the remaining copy, encoded as 3 bytes. + SUBL $1, AX + SHLB $2, AX + ORB $2, AX + MOVB AX, 0(DI) + MOVW R11, 1(DI) + ADDQ $3, DI + + // Return the number of bytes written. + SUBQ SI, DI + MOVQ DI, ret+40(FP) + RET + +// ---------------------------------------------------------------------------- + +// func extendMatch(src []byte, i, j int) int +// +// All local variables fit into registers. The register allocation: +// - DX &src[0] +// - SI &src[j] +// - R13 &src[len(src) - 8] +// - R14 &src[len(src)] +// - R15 &src[i] +// +// The unusual register allocation of local variables, such as R15 for a source +// pointer, matches the allocation used at the call site in encodeBlock, which +// makes it easier to manually inline this function. +TEXT ·extendMatch(SB), NOSPLIT, $0-48 + MOVQ src_base+0(FP), DX + MOVQ src_len+8(FP), R14 + MOVQ i+24(FP), R15 + MOVQ j+32(FP), SI + ADDQ DX, R14 + ADDQ DX, R15 + ADDQ DX, SI + MOVQ R14, R13 + SUBQ $8, R13 + +cmp8: + // As long as we are 8 or more bytes before the end of src, we can load and + // compare 8 bytes at a time. If those 8 bytes are equal, repeat. + CMPQ SI, R13 + JA cmp1 + MOVQ (R15), AX + MOVQ (SI), BX + CMPQ AX, BX + JNE bsf + ADDQ $8, R15 + ADDQ $8, SI + JMP cmp8 + +bsf: + // If those 8 bytes were not equal, XOR the two 8 byte values, and return + // the index of the first byte that differs. The BSF instruction finds the + // least significant 1 bit, the amd64 architecture is little-endian, and + // the shift by 3 converts a bit index to a byte index. + XORQ AX, BX + BSFQ BX, BX + SHRQ $3, BX + ADDQ BX, SI + + // Convert from &src[ret] to ret. + SUBQ DX, SI + MOVQ SI, ret+40(FP) + RET + +cmp1: + // In src's tail, compare 1 byte at a time. + CMPQ SI, R14 + JAE extendMatchEnd + MOVB (R15), AX + MOVB (SI), BX + CMPB AX, BX + JNE extendMatchEnd + ADDQ $1, R15 + ADDQ $1, SI + JMP cmp1 + +extendMatchEnd: + // Convert from &src[ret] to ret. + SUBQ DX, SI + MOVQ SI, ret+40(FP) + RET + +// ---------------------------------------------------------------------------- + +// func encodeBlock(dst, src []byte) (d int) +// +// All local variables fit into registers, other than "var table". The register +// allocation: +// - AX . . +// - BX . . +// - CX 56 shift (note that amd64 shifts by non-immediates must use CX). +// - DX 64 &src[0], tableSize +// - SI 72 &src[s] +// - DI 80 &dst[d] +// - R9 88 sLimit +// - R10 . &src[nextEmit] +// - R11 96 prevHash, currHash, nextHash, offset +// - R12 104 &src[base], skip +// - R13 . &src[nextS], &src[len(src) - 8] +// - R14 . len(src), bytesBetweenHashLookups, &src[len(src)], x +// - R15 112 candidate +// +// The second column (56, 64, etc) is the stack offset to spill the registers +// when calling other functions. We could pack this slightly tighter, but it's +// simpler to have a dedicated spill map independent of the function called. +// +// "var table [maxTableSize]uint16" takes up 32768 bytes of stack space. An +// extra 56 bytes, to call other functions, and an extra 64 bytes, to spill +// local variables (registers) during calls gives 32768 + 56 + 64 = 32888. +TEXT ·encodeBlock(SB), 0, $32888-56 + MOVQ dst_base+0(FP), DI + MOVQ src_base+24(FP), SI + MOVQ src_len+32(FP), R14 + + // shift, tableSize := uint32(32-8), 1<<8 + MOVQ $24, CX + MOVQ $256, DX + +calcShift: + // for ; tableSize < maxTableSize && tableSize < len(src); tableSize *= 2 { + // shift-- + // } + CMPQ DX, $16384 + JGE varTable + CMPQ DX, R14 + JGE varTable + SUBQ $1, CX + SHLQ $1, DX + JMP calcShift + +varTable: + // var table [maxTableSize]uint16 + // + // In the asm code, unlike the Go code, we can zero-initialize only the + // first tableSize elements. Each uint16 element is 2 bytes and each MOVOU + // writes 16 bytes, so we can do only tableSize/8 writes instead of the + // 2048 writes that would zero-initialize all of table's 32768 bytes. + SHRQ $3, DX + LEAQ table-32768(SP), BX + PXOR X0, X0 + +memclr: + MOVOU X0, 0(BX) + ADDQ $16, BX + SUBQ $1, DX + JNZ memclr + + // !!! DX = &src[0] + MOVQ SI, DX + + // sLimit := len(src) - inputMargin + MOVQ R14, R9 + SUBQ $15, R9 + + // !!! Pre-emptively spill CX, DX and R9 to the stack. Their values don't + // change for the rest of the function. + MOVQ CX, 56(SP) + MOVQ DX, 64(SP) + MOVQ R9, 88(SP) + + // nextEmit := 0 + MOVQ DX, R10 + + // s := 1 + ADDQ $1, SI + + // nextHash := hash(load32(src, s), shift) + MOVL 0(SI), R11 + IMULL $0x1e35a7bd, R11 + SHRL CX, R11 + +outer: + // for { etc } + + // skip := 32 + MOVQ $32, R12 + + // nextS := s + MOVQ SI, R13 + + // candidate := 0 + MOVQ $0, R15 + +inner0: + // for { etc } + + // s := nextS + MOVQ R13, SI + + // bytesBetweenHashLookups := skip >> 5 + MOVQ R12, R14 + SHRQ $5, R14 + + // nextS = s + bytesBetweenHashLookups + ADDQ R14, R13 + + // skip += bytesBetweenHashLookups + ADDQ R14, R12 + + // if nextS > sLimit { goto emitRemainder } + MOVQ R13, AX + SUBQ DX, AX + CMPQ AX, R9 + JA emitRemainder + + // candidate = int(table[nextHash]) + // XXX: MOVWQZX table-32768(SP)(R11*2), R15 + // XXX: 4e 0f b7 7c 5c 78 movzwq 0x78(%rsp,%r11,2),%r15 + BYTE $0x4e + BYTE $0x0f + BYTE $0xb7 + BYTE $0x7c + BYTE $0x5c + BYTE $0x78 + + // table[nextHash] = uint16(s) + MOVQ SI, AX + SUBQ DX, AX + + // XXX: MOVW AX, table-32768(SP)(R11*2) + // XXX: 66 42 89 44 5c 78 mov %ax,0x78(%rsp,%r11,2) + BYTE $0x66 + BYTE $0x42 + BYTE $0x89 + BYTE $0x44 + BYTE $0x5c + BYTE $0x78 + + // nextHash = hash(load32(src, nextS), shift) + MOVL 0(R13), R11 + IMULL $0x1e35a7bd, R11 + SHRL CX, R11 + + // if load32(src, s) != load32(src, candidate) { continue } break + MOVL 0(SI), AX + MOVL (DX)(R15*1), BX + CMPL AX, BX + JNE inner0 + +fourByteMatch: + // As per the encode_other.go code: + // + // A 4-byte match has been found. We'll later see etc. + + // !!! Jump to a fast path for short (<= 16 byte) literals. See the comment + // on inputMargin in encode.go. + MOVQ SI, AX + SUBQ R10, AX + CMPQ AX, $16 + JLE emitLiteralFastPath + + // ---------------------------------------- + // Begin inline of the emitLiteral call. + // + // d += emitLiteral(dst[d:], src[nextEmit:s]) + + MOVL AX, BX + SUBL $1, BX + + CMPL BX, $60 + JLT inlineEmitLiteralOneByte + CMPL BX, $256 + JLT inlineEmitLiteralTwoBytes + +inlineEmitLiteralThreeBytes: + MOVB $0xf4, 0(DI) + MOVW BX, 1(DI) + ADDQ $3, DI + JMP inlineEmitLiteralMemmove + +inlineEmitLiteralTwoBytes: + MOVB $0xf0, 0(DI) + MOVB BX, 1(DI) + ADDQ $2, DI + JMP inlineEmitLiteralMemmove + +inlineEmitLiteralOneByte: + SHLB $2, BX + MOVB BX, 0(DI) + ADDQ $1, DI + +inlineEmitLiteralMemmove: + // Spill local variables (registers) onto the stack; call; unspill. + // + // copy(dst[i:], lit) + // + // This means calling runtime·memmove(&dst[i], &lit[0], len(lit)), so we push + // DI, R10 and AX as arguments. + MOVQ DI, 0(SP) + MOVQ R10, 8(SP) + MOVQ AX, 16(SP) + ADDQ AX, DI // Finish the "d +=" part of "d += emitLiteral(etc)". + MOVQ SI, 72(SP) + MOVQ DI, 80(SP) + MOVQ R15, 112(SP) + CALL runtime·memmove(SB) + MOVQ 56(SP), CX + MOVQ 64(SP), DX + MOVQ 72(SP), SI + MOVQ 80(SP), DI + MOVQ 88(SP), R9 + MOVQ 112(SP), R15 + JMP inner1 + +inlineEmitLiteralEnd: + // End inline of the emitLiteral call. + // ---------------------------------------- + +emitLiteralFastPath: + // !!! Emit the 1-byte encoding "uint8(len(lit)-1)<<2". + MOVB AX, BX + SUBB $1, BX + SHLB $2, BX + MOVB BX, (DI) + ADDQ $1, DI + + // !!! Implement the copy from lit to dst as a 16-byte load and store. + // (Encode's documentation says that dst and src must not overlap.) + // + // This always copies 16 bytes, instead of only len(lit) bytes, but that's + // OK. Subsequent iterations will fix up the overrun. + // + // Note that on amd64, it is legal and cheap to issue unaligned 8-byte or + // 16-byte loads and stores. This technique probably wouldn't be as + // effective on architectures that are fussier about alignment. + MOVOU 0(R10), X0 + MOVOU X0, 0(DI) + ADDQ AX, DI + +inner1: + // for { etc } + + // base := s + MOVQ SI, R12 + + // !!! offset := base - candidate + MOVQ R12, R11 + SUBQ R15, R11 + SUBQ DX, R11 + + // ---------------------------------------- + // Begin inline of the extendMatch call. + // + // s = extendMatch(src, candidate+4, s+4) + + // !!! R14 = &src[len(src)] + MOVQ src_len+32(FP), R14 + ADDQ DX, R14 + + // !!! R13 = &src[len(src) - 8] + MOVQ R14, R13 + SUBQ $8, R13 + + // !!! R15 = &src[candidate + 4] + ADDQ $4, R15 + ADDQ DX, R15 + + // !!! s += 4 + ADDQ $4, SI + +inlineExtendMatchCmp8: + // As long as we are 8 or more bytes before the end of src, we can load and + // compare 8 bytes at a time. If those 8 bytes are equal, repeat. + CMPQ SI, R13 + JA inlineExtendMatchCmp1 + MOVQ (R15), AX + MOVQ (SI), BX + CMPQ AX, BX + JNE inlineExtendMatchBSF + ADDQ $8, R15 + ADDQ $8, SI + JMP inlineExtendMatchCmp8 + +inlineExtendMatchBSF: + // If those 8 bytes were not equal, XOR the two 8 byte values, and return + // the index of the first byte that differs. The BSF instruction finds the + // least significant 1 bit, the amd64 architecture is little-endian, and + // the shift by 3 converts a bit index to a byte index. + XORQ AX, BX + BSFQ BX, BX + SHRQ $3, BX + ADDQ BX, SI + JMP inlineExtendMatchEnd + +inlineExtendMatchCmp1: + // In src's tail, compare 1 byte at a time. + CMPQ SI, R14 + JAE inlineExtendMatchEnd + MOVB (R15), AX + MOVB (SI), BX + CMPB AX, BX + JNE inlineExtendMatchEnd + ADDQ $1, R15 + ADDQ $1, SI + JMP inlineExtendMatchCmp1 + +inlineExtendMatchEnd: + // End inline of the extendMatch call. + // ---------------------------------------- + + // ---------------------------------------- + // Begin inline of the emitCopy call. + // + // d += emitCopy(dst[d:], base-candidate, s-base) + + // !!! length := s - base + MOVQ SI, AX + SUBQ R12, AX + +inlineEmitCopyLoop0: + // for length >= 68 { etc } + CMPL AX, $68 + JLT inlineEmitCopyStep1 + + // Emit a length 64 copy, encoded as 3 bytes. + MOVB $0xfe, 0(DI) + MOVW R11, 1(DI) + ADDQ $3, DI + SUBL $64, AX + JMP inlineEmitCopyLoop0 + +inlineEmitCopyStep1: + // if length > 64 { etc } + CMPL AX, $64 + JLE inlineEmitCopyStep2 + + // Emit a length 60 copy, encoded as 3 bytes. + MOVB $0xee, 0(DI) + MOVW R11, 1(DI) + ADDQ $3, DI + SUBL $60, AX + +inlineEmitCopyStep2: + // if length >= 12 || offset >= 2048 { goto inlineEmitCopyStep3 } + CMPL AX, $12 + JGE inlineEmitCopyStep3 + CMPL R11, $2048 + JGE inlineEmitCopyStep3 + + // Emit the remaining copy, encoded as 2 bytes. + MOVB R11, 1(DI) + SHRL $8, R11 + SHLB $5, R11 + SUBB $4, AX + SHLB $2, AX + ORB AX, R11 + ORB $1, R11 + MOVB R11, 0(DI) + ADDQ $2, DI + JMP inlineEmitCopyEnd + +inlineEmitCopyStep3: + // Emit the remaining copy, encoded as 3 bytes. + SUBL $1, AX + SHLB $2, AX + ORB $2, AX + MOVB AX, 0(DI) + MOVW R11, 1(DI) + ADDQ $3, DI + +inlineEmitCopyEnd: + // End inline of the emitCopy call. + // ---------------------------------------- + + // nextEmit = s + MOVQ SI, R10 + + // if s >= sLimit { goto emitRemainder } + MOVQ SI, AX + SUBQ DX, AX + CMPQ AX, R9 + JAE emitRemainder + + // As per the encode_other.go code: + // + // We could immediately etc. + + // x := load64(src, s-1) + MOVQ -1(SI), R14 + + // prevHash := hash(uint32(x>>0), shift) + MOVL R14, R11 + IMULL $0x1e35a7bd, R11 + SHRL CX, R11 + + // table[prevHash] = uint16(s-1) + MOVQ SI, AX + SUBQ DX, AX + SUBQ $1, AX + + // XXX: MOVW AX, table-32768(SP)(R11*2) + // XXX: 66 42 89 44 5c 78 mov %ax,0x78(%rsp,%r11,2) + BYTE $0x66 + BYTE $0x42 + BYTE $0x89 + BYTE $0x44 + BYTE $0x5c + BYTE $0x78 + + // currHash := hash(uint32(x>>8), shift) + SHRQ $8, R14 + MOVL R14, R11 + IMULL $0x1e35a7bd, R11 + SHRL CX, R11 + + // candidate = int(table[currHash]) + // XXX: MOVWQZX table-32768(SP)(R11*2), R15 + // XXX: 4e 0f b7 7c 5c 78 movzwq 0x78(%rsp,%r11,2),%r15 + BYTE $0x4e + BYTE $0x0f + BYTE $0xb7 + BYTE $0x7c + BYTE $0x5c + BYTE $0x78 + + // table[currHash] = uint16(s) + ADDQ $1, AX + + // XXX: MOVW AX, table-32768(SP)(R11*2) + // XXX: 66 42 89 44 5c 78 mov %ax,0x78(%rsp,%r11,2) + BYTE $0x66 + BYTE $0x42 + BYTE $0x89 + BYTE $0x44 + BYTE $0x5c + BYTE $0x78 + + // if uint32(x>>8) == load32(src, candidate) { continue } + MOVL (DX)(R15*1), BX + CMPL R14, BX + JEQ inner1 + + // nextHash = hash(uint32(x>>16), shift) + SHRQ $8, R14 + MOVL R14, R11 + IMULL $0x1e35a7bd, R11 + SHRL CX, R11 + + // s++ + ADDQ $1, SI + + // break out of the inner1 for loop, i.e. continue the outer loop. + JMP outer + +emitRemainder: + // if nextEmit < len(src) { etc } + MOVQ src_len+32(FP), AX + ADDQ DX, AX + CMPQ R10, AX + JEQ encodeBlockEnd + + // d += emitLiteral(dst[d:], src[nextEmit:]) + // + // Push args. + MOVQ DI, 0(SP) + MOVQ $0, 8(SP) // Unnecessary, as the callee ignores it, but conservative. + MOVQ $0, 16(SP) // Unnecessary, as the callee ignores it, but conservative. + MOVQ R10, 24(SP) + SUBQ R10, AX + MOVQ AX, 32(SP) + MOVQ AX, 40(SP) // Unnecessary, as the callee ignores it, but conservative. + + // Spill local variables (registers) onto the stack; call; unspill. + MOVQ DI, 80(SP) + CALL ·emitLiteral(SB) + MOVQ 80(SP), DI + + // Finish the "d +=" part of "d += emitLiteral(etc)". + ADDQ 48(SP), DI + +encodeBlockEnd: + MOVQ dst_base+0(FP), AX + SUBQ AX, DI + MOVQ DI, d+48(FP) + RET diff --git a/vendor/github.com/golang/snappy/encode_other.go b/vendor/github.com/golang/snappy/encode_other.go new file mode 100644 index 0000000..dbcae90 --- /dev/null +++ b/vendor/github.com/golang/snappy/encode_other.go @@ -0,0 +1,238 @@ +// Copyright 2016 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !amd64 appengine !gc noasm + +package snappy + +func load32(b []byte, i int) uint32 { + b = b[i : i+4 : len(b)] // Help the compiler eliminate bounds checks on the next line. + return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 +} + +func load64(b []byte, i int) uint64 { + b = b[i : i+8 : len(b)] // Help the compiler eliminate bounds checks on the next line. + return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | + uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 +} + +// emitLiteral writes a literal chunk and returns the number of bytes written. +// +// It assumes that: +// dst is long enough to hold the encoded bytes +// 1 <= len(lit) && len(lit) <= 65536 +func emitLiteral(dst, lit []byte) int { + i, n := 0, uint(len(lit)-1) + switch { + case n < 60: + dst[0] = uint8(n)<<2 | tagLiteral + i = 1 + case n < 1<<8: + dst[0] = 60<<2 | tagLiteral + dst[1] = uint8(n) + i = 2 + default: + dst[0] = 61<<2 | tagLiteral + dst[1] = uint8(n) + dst[2] = uint8(n >> 8) + i = 3 + } + return i + copy(dst[i:], lit) +} + +// emitCopy writes a copy chunk and returns the number of bytes written. +// +// It assumes that: +// dst is long enough to hold the encoded bytes +// 1 <= offset && offset <= 65535 +// 4 <= length && length <= 65535 +func emitCopy(dst []byte, offset, length int) int { + i := 0 + // The maximum length for a single tagCopy1 or tagCopy2 op is 64 bytes. The + // threshold for this loop is a little higher (at 68 = 64 + 4), and the + // length emitted down below is is a little lower (at 60 = 64 - 4), because + // it's shorter to encode a length 67 copy as a length 60 tagCopy2 followed + // by a length 7 tagCopy1 (which encodes as 3+2 bytes) than to encode it as + // a length 64 tagCopy2 followed by a length 3 tagCopy2 (which encodes as + // 3+3 bytes). The magic 4 in the 64±4 is because the minimum length for a + // tagCopy1 op is 4 bytes, which is why a length 3 copy has to be an + // encodes-as-3-bytes tagCopy2 instead of an encodes-as-2-bytes tagCopy1. + for length >= 68 { + // Emit a length 64 copy, encoded as 3 bytes. + dst[i+0] = 63<<2 | tagCopy2 + dst[i+1] = uint8(offset) + dst[i+2] = uint8(offset >> 8) + i += 3 + length -= 64 + } + if length > 64 { + // Emit a length 60 copy, encoded as 3 bytes. + dst[i+0] = 59<<2 | tagCopy2 + dst[i+1] = uint8(offset) + dst[i+2] = uint8(offset >> 8) + i += 3 + length -= 60 + } + if length >= 12 || offset >= 2048 { + // Emit the remaining copy, encoded as 3 bytes. + dst[i+0] = uint8(length-1)<<2 | tagCopy2 + dst[i+1] = uint8(offset) + dst[i+2] = uint8(offset >> 8) + return i + 3 + } + // Emit the remaining copy, encoded as 2 bytes. + dst[i+0] = uint8(offset>>8)<<5 | uint8(length-4)<<2 | tagCopy1 + dst[i+1] = uint8(offset) + return i + 2 +} + +// extendMatch returns the largest k such that k <= len(src) and that +// src[i:i+k-j] and src[j:k] have the same contents. +// +// It assumes that: +// 0 <= i && i < j && j <= len(src) +func extendMatch(src []byte, i, j int) int { + for ; j < len(src) && src[i] == src[j]; i, j = i+1, j+1 { + } + return j +} + +func hash(u, shift uint32) uint32 { + return (u * 0x1e35a7bd) >> shift +} + +// encodeBlock encodes a non-empty src to a guaranteed-large-enough dst. It +// assumes that the varint-encoded length of the decompressed bytes has already +// been written. +// +// It also assumes that: +// len(dst) >= MaxEncodedLen(len(src)) && +// minNonLiteralBlockSize <= len(src) && len(src) <= maxBlockSize +func encodeBlock(dst, src []byte) (d int) { + // Initialize the hash table. Its size ranges from 1<<8 to 1<<14 inclusive. + // The table element type is uint16, as s < sLimit and sLimit < len(src) + // and len(src) <= maxBlockSize and maxBlockSize == 65536. + const ( + maxTableSize = 1 << 14 + // tableMask is redundant, but helps the compiler eliminate bounds + // checks. + tableMask = maxTableSize - 1 + ) + shift := uint32(32 - 8) + for tableSize := 1 << 8; tableSize < maxTableSize && tableSize < len(src); tableSize *= 2 { + shift-- + } + // In Go, all array elements are zero-initialized, so there is no advantage + // to a smaller tableSize per se. However, it matches the C++ algorithm, + // and in the asm versions of this code, we can get away with zeroing only + // the first tableSize elements. + var table [maxTableSize]uint16 + + // sLimit is when to stop looking for offset/length copies. The inputMargin + // lets us use a fast path for emitLiteral in the main loop, while we are + // looking for copies. + sLimit := len(src) - inputMargin + + // nextEmit is where in src the next emitLiteral should start from. + nextEmit := 0 + + // The encoded form must start with a literal, as there are no previous + // bytes to copy, so we start looking for hash matches at s == 1. + s := 1 + nextHash := hash(load32(src, s), shift) + + for { + // Copied from the C++ snappy implementation: + // + // Heuristic match skipping: If 32 bytes are scanned with no matches + // found, start looking only at every other byte. If 32 more bytes are + // scanned (or skipped), look at every third byte, etc.. When a match + // is found, immediately go back to looking at every byte. This is a + // small loss (~5% performance, ~0.1% density) for compressible data + // due to more bookkeeping, but for non-compressible data (such as + // JPEG) it's a huge win since the compressor quickly "realizes" the + // data is incompressible and doesn't bother looking for matches + // everywhere. + // + // The "skip" variable keeps track of how many bytes there are since + // the last match; dividing it by 32 (ie. right-shifting by five) gives + // the number of bytes to move ahead for each iteration. + skip := 32 + + nextS := s + candidate := 0 + for { + s = nextS + bytesBetweenHashLookups := skip >> 5 + nextS = s + bytesBetweenHashLookups + skip += bytesBetweenHashLookups + if nextS > sLimit { + goto emitRemainder + } + candidate = int(table[nextHash&tableMask]) + table[nextHash&tableMask] = uint16(s) + nextHash = hash(load32(src, nextS), shift) + if load32(src, s) == load32(src, candidate) { + break + } + } + + // A 4-byte match has been found. We'll later see if more than 4 bytes + // match. But, prior to the match, src[nextEmit:s] are unmatched. Emit + // them as literal bytes. + d += emitLiteral(dst[d:], src[nextEmit:s]) + + // Call emitCopy, and then see if another emitCopy could be our next + // move. Repeat until we find no match for the input immediately after + // what was consumed by the last emitCopy call. + // + // If we exit this loop normally then we need to call emitLiteral next, + // though we don't yet know how big the literal will be. We handle that + // by proceeding to the next iteration of the main loop. We also can + // exit this loop via goto if we get close to exhausting the input. + for { + // Invariant: we have a 4-byte match at s, and no need to emit any + // literal bytes prior to s. + base := s + + // Extend the 4-byte match as long as possible. + // + // This is an inlined version of: + // s = extendMatch(src, candidate+4, s+4) + s += 4 + for i := candidate + 4; s < len(src) && src[i] == src[s]; i, s = i+1, s+1 { + } + + d += emitCopy(dst[d:], base-candidate, s-base) + nextEmit = s + if s >= sLimit { + goto emitRemainder + } + + // We could immediately start working at s now, but to improve + // compression we first update the hash table at s-1 and at s. If + // another emitCopy is not our next move, also calculate nextHash + // at s+1. At least on GOARCH=amd64, these three hash calculations + // are faster as one load64 call (with some shifts) instead of + // three load32 calls. + x := load64(src, s-1) + prevHash := hash(uint32(x>>0), shift) + table[prevHash&tableMask] = uint16(s - 1) + currHash := hash(uint32(x>>8), shift) + candidate = int(table[currHash&tableMask]) + table[currHash&tableMask] = uint16(s) + if uint32(x>>8) != load32(src, candidate) { + nextHash = hash(uint32(x>>16), shift) + s++ + break + } + } + } + +emitRemainder: + if nextEmit < len(src) { + d += emitLiteral(dst[d:], src[nextEmit:]) + } + return d +} diff --git a/vendor/github.com/golang/snappy/snappy.go b/vendor/github.com/golang/snappy/snappy.go new file mode 100644 index 0000000..ece692e --- /dev/null +++ b/vendor/github.com/golang/snappy/snappy.go @@ -0,0 +1,98 @@ +// Copyright 2011 The Snappy-Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package snappy implements the Snappy compression format. It aims for very +// high speeds and reasonable compression. +// +// There are actually two Snappy formats: block and stream. They are related, +// but different: trying to decompress block-compressed data as a Snappy stream +// will fail, and vice versa. The block format is the Decode and Encode +// functions and the stream format is the Reader and Writer types. +// +// The block format, the more common case, is used when the complete size (the +// number of bytes) of the original data is known upfront, at the time +// compression starts. The stream format, also known as the framing format, is +// for when that isn't always true. +// +// The canonical, C++ implementation is at https://github.com/google/snappy and +// it only implements the block format. +package snappy // import "github.com/golang/snappy" + +import ( + "hash/crc32" +) + +/* +Each encoded block begins with the varint-encoded length of the decoded data, +followed by a sequence of chunks. Chunks begin and end on byte boundaries. The +first byte of each chunk is broken into its 2 least and 6 most significant bits +called l and m: l ranges in [0, 4) and m ranges in [0, 64). l is the chunk tag. +Zero means a literal tag. All other values mean a copy tag. + +For literal tags: + - If m < 60, the next 1 + m bytes are literal bytes. + - Otherwise, let n be the little-endian unsigned integer denoted by the next + m - 59 bytes. The next 1 + n bytes after that are literal bytes. + +For copy tags, length bytes are copied from offset bytes ago, in the style of +Lempel-Ziv compression algorithms. In particular: + - For l == 1, the offset ranges in [0, 1<<11) and the length in [4, 12). + The length is 4 + the low 3 bits of m. The high 3 bits of m form bits 8-10 + of the offset. The next byte is bits 0-7 of the offset. + - For l == 2, the offset ranges in [0, 1<<16) and the length in [1, 65). + The length is 1 + m. The offset is the little-endian unsigned integer + denoted by the next 2 bytes. + - For l == 3, this tag is a legacy format that is no longer issued by most + encoders. Nonetheless, the offset ranges in [0, 1<<32) and the length in + [1, 65). The length is 1 + m. The offset is the little-endian unsigned + integer denoted by the next 4 bytes. +*/ +const ( + tagLiteral = 0x00 + tagCopy1 = 0x01 + tagCopy2 = 0x02 + tagCopy4 = 0x03 +) + +const ( + checksumSize = 4 + chunkHeaderSize = 4 + magicChunk = "\xff\x06\x00\x00" + magicBody + magicBody = "sNaPpY" + + // maxBlockSize is the maximum size of the input to encodeBlock. It is not + // part of the wire format per se, but some parts of the encoder assume + // that an offset fits into a uint16. + // + // Also, for the framing format (Writer type instead of Encode function), + // https://github.com/google/snappy/blob/master/framing_format.txt says + // that "the uncompressed data in a chunk must be no longer than 65536 + // bytes". + maxBlockSize = 65536 + + // maxEncodedLenOfMaxBlockSize equals MaxEncodedLen(maxBlockSize), but is + // hard coded to be a const instead of a variable, so that obufLen can also + // be a const. Their equivalence is confirmed by + // TestMaxEncodedLenOfMaxBlockSize. + maxEncodedLenOfMaxBlockSize = 76490 + + obufHeaderLen = len(magicChunk) + checksumSize + chunkHeaderSize + obufLen = obufHeaderLen + maxEncodedLenOfMaxBlockSize +) + +const ( + chunkTypeCompressedData = 0x00 + chunkTypeUncompressedData = 0x01 + chunkTypePadding = 0xfe + chunkTypeStreamIdentifier = 0xff +) + +var crcTable = crc32.MakeTable(crc32.Castagnoli) + +// crc implements the checksum specified in section 3 of +// https://github.com/google/snappy/blob/master/framing_format.txt +func crc(b []byte) uint32 { + c := crc32.Update(0, crcTable, b) + return uint32(c>>15|c<<17) + 0xa282ead8 +} diff --git a/vendor/github.com/klauspost/cpuid/CONTRIBUTING.txt b/vendor/github.com/klauspost/cpuid/CONTRIBUTING.txt new file mode 100644 index 0000000..2ef4714 --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/CONTRIBUTING.txt @@ -0,0 +1,35 @@ +Developer Certificate of Origin +Version 1.1 + +Copyright (C) 2015- Klaus Post & Contributors. +Email: klauspost@gmail.com + +Everyone is permitted to copy and distribute verbatim copies of this +license document, but changing it is not allowed. + + +Developer's Certificate of Origin 1.1 + +By making a contribution to this project, I certify that: + +(a) The contribution was created in whole or in part by me and I + have the right to submit it under the open source license + indicated in the file; or + +(b) The contribution is based upon previous work that, to the best + of my knowledge, is covered under an appropriate open source + license and I have the right under that license to submit that + work with modifications, whether created in whole or in part + by me, under the same open source license (unless I am + permitted to submit under a different license), as indicated + in the file; or + +(c) The contribution was provided directly to me by some other + person who certified (a), (b) or (c) and I have not modified + it. + +(d) I understand and agree that this project and the contribution + are public and that a record of the contribution (including all + personal information I submit with it, including my sign-off) is + maintained indefinitely and may be redistributed consistent with + this project or the open source license(s) involved. diff --git a/vendor/github.com/klauspost/cpuid/LICENSE b/vendor/github.com/klauspost/cpuid/LICENSE new file mode 100644 index 0000000..5cec7ee --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/LICENSE @@ -0,0 +1,22 @@ +The MIT License (MIT) + +Copyright (c) 2015 Klaus Post + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/vendor/github.com/klauspost/cpuid/README.md b/vendor/github.com/klauspost/cpuid/README.md new file mode 100644 index 0000000..b2b6bee --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/README.md @@ -0,0 +1,145 @@ +# cpuid +Package cpuid provides information about the CPU running the current program. + +CPU features are detected on startup, and kept for fast access through the life of the application. +Currently x86 / x64 (AMD64) is supported, and no external C (cgo) code is used, which should make the library very easy to use. + +You can access the CPU information by accessing the shared CPU variable of the cpuid library. + +Package home: https://github.com/klauspost/cpuid + +[![GoDoc][1]][2] [![Build Status][3]][4] + +[1]: https://godoc.org/github.com/klauspost/cpuid?status.svg +[2]: https://godoc.org/github.com/klauspost/cpuid +[3]: https://travis-ci.org/klauspost/cpuid.svg +[4]: https://travis-ci.org/klauspost/cpuid + +# features +## CPU Instructions +* **CMOV** (i686 CMOV) +* **NX** (NX (No-Execute) bit) +* **AMD3DNOW** (AMD 3DNOW) +* **AMD3DNOWEXT** (AMD 3DNowExt) +* **MMX** (standard MMX) +* **MMXEXT** (SSE integer functions or AMD MMX ext) +* **SSE** (SSE functions) +* **SSE2** (P4 SSE functions) +* **SSE3** (Prescott SSE3 functions) +* **SSSE3** (Conroe SSSE3 functions) +* **SSE4** (Penryn SSE4.1 functions) +* **SSE4A** (AMD Barcelona microarchitecture SSE4a instructions) +* **SSE42** (Nehalem SSE4.2 functions) +* **AVX** (AVX functions) +* **AVX2** (AVX2 functions) +* **FMA3** (Intel FMA 3) +* **FMA4** (Bulldozer FMA4 functions) +* **XOP** (Bulldozer XOP functions) +* **F16C** (Half-precision floating-point conversion) +* **BMI1** (Bit Manipulation Instruction Set 1) +* **BMI2** (Bit Manipulation Instruction Set 2) +* **TBM** (AMD Trailing Bit Manipulation) +* **LZCNT** (LZCNT instruction) +* **POPCNT** (POPCNT instruction) +* **AESNI** (Advanced Encryption Standard New Instructions) +* **CLMUL** (Carry-less Multiplication) +* **HTT** (Hyperthreading (enabled)) +* **HLE** (Hardware Lock Elision) +* **RTM** (Restricted Transactional Memory) +* **RDRAND** (RDRAND instruction is available) +* **RDSEED** (RDSEED instruction is available) +* **ADX** (Intel ADX (Multi-Precision Add-Carry Instruction Extensions)) +* **SHA** (Intel SHA Extensions) +* **AVX512F** (AVX-512 Foundation) +* **AVX512DQ** (AVX-512 Doubleword and Quadword Instructions) +* **AVX512IFMA** (AVX-512 Integer Fused Multiply-Add Instructions) +* **AVX512PF** (AVX-512 Prefetch Instructions) +* **AVX512ER** (AVX-512 Exponential and Reciprocal Instructions) +* **AVX512CD** (AVX-512 Conflict Detection Instructions) +* **AVX512BW** (AVX-512 Byte and Word Instructions) +* **AVX512VL** (AVX-512 Vector Length Extensions) +* **AVX512VBMI** (AVX-512 Vector Bit Manipulation Instructions) +* **MPX** (Intel MPX (Memory Protection Extensions)) +* **ERMS** (Enhanced REP MOVSB/STOSB) +* **RDTSCP** (RDTSCP Instruction) +* **CX16** (CMPXCHG16B Instruction) +* **SGX** (Software Guard Extensions, with activation details) + +## Performance +* **RDTSCP()** Returns current cycle count. Can be used for benchmarking. +* **SSE2SLOW** (SSE2 is supported, but usually not faster) +* **SSE3SLOW** (SSE3 is supported, but usually not faster) +* **ATOM** (Atom processor, some SSSE3 instructions are slower) +* **Cache line** (Probable size of a cache line). +* **L1, L2, L3 Cache size** on newer Intel/AMD CPUs. + +## Cpu Vendor/VM +* **Intel** +* **AMD** +* **VIA** +* **Transmeta** +* **NSC** +* **KVM** (Kernel-based Virtual Machine) +* **MSVM** (Microsoft Hyper-V or Windows Virtual PC) +* **VMware** +* **XenHVM** + +# installing + +```go get github.com/klauspost/cpuid``` + +# example + +```Go +package main + +import ( + "fmt" + "github.com/klauspost/cpuid" +) + +func main() { + // Print basic CPU information: + fmt.Println("Name:", cpuid.CPU.BrandName) + fmt.Println("PhysicalCores:", cpuid.CPU.PhysicalCores) + fmt.Println("ThreadsPerCore:", cpuid.CPU.ThreadsPerCore) + fmt.Println("LogicalCores:", cpuid.CPU.LogicalCores) + fmt.Println("Family", cpuid.CPU.Family, "Model:", cpuid.CPU.Model) + fmt.Println("Features:", cpuid.CPU.Features) + fmt.Println("Cacheline bytes:", cpuid.CPU.CacheLine) + fmt.Println("L1 Data Cache:", cpuid.CPU.Cache.L1D, "bytes") + fmt.Println("L1 Instruction Cache:", cpuid.CPU.Cache.L1D, "bytes") + fmt.Println("L2 Cache:", cpuid.CPU.Cache.L2, "bytes") + fmt.Println("L3 Cache:", cpuid.CPU.Cache.L3, "bytes") + + // Test if we have a specific feature: + if cpuid.CPU.SSE() { + fmt.Println("We have Streaming SIMD Extensions") + } +} +``` + +Sample output: +``` +>go run main.go +Name: Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz +PhysicalCores: 2 +ThreadsPerCore: 2 +LogicalCores: 4 +Family 6 Model: 42 +Features: CMOV,MMX,MMXEXT,SSE,SSE2,SSE3,SSSE3,SSE4.1,SSE4.2,AVX,AESNI,CLMUL +Cacheline bytes: 64 +We have Streaming SIMD Extensions +``` + +# private package + +In the "private" folder you can find an autogenerated version of the library you can include in your own packages. + +For this purpose all exports are removed, and functions and constants are lowercased. + +This is not a recommended way of using the library, but provided for convenience, if it is difficult for you to use external packages. + +# license + +This code is published under an MIT license. See LICENSE file for more information. diff --git a/vendor/github.com/klauspost/cpuid/cpuid.go b/vendor/github.com/klauspost/cpuid/cpuid.go new file mode 100644 index 0000000..60c681b --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/cpuid.go @@ -0,0 +1,1040 @@ +// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file. + +// Package cpuid provides information about the CPU running the current program. +// +// CPU features are detected on startup, and kept for fast access through the life of the application. +// Currently x86 / x64 (AMD64) is supported. +// +// You can access the CPU information by accessing the shared CPU variable of the cpuid library. +// +// Package home: https://github.com/klauspost/cpuid +package cpuid + +import "strings" + +// Vendor is a representation of a CPU vendor. +type Vendor int + +const ( + Other Vendor = iota + Intel + AMD + VIA + Transmeta + NSC + KVM // Kernel-based Virtual Machine + MSVM // Microsoft Hyper-V or Windows Virtual PC + VMware + XenHVM +) + +const ( + CMOV = 1 << iota // i686 CMOV + NX // NX (No-Execute) bit + AMD3DNOW // AMD 3DNOW + AMD3DNOWEXT // AMD 3DNowExt + MMX // standard MMX + MMXEXT // SSE integer functions or AMD MMX ext + SSE // SSE functions + SSE2 // P4 SSE functions + SSE3 // Prescott SSE3 functions + SSSE3 // Conroe SSSE3 functions + SSE4 // Penryn SSE4.1 functions + SSE4A // AMD Barcelona microarchitecture SSE4a instructions + SSE42 // Nehalem SSE4.2 functions + AVX // AVX functions + AVX2 // AVX2 functions + FMA3 // Intel FMA 3 + FMA4 // Bulldozer FMA4 functions + XOP // Bulldozer XOP functions + F16C // Half-precision floating-point conversion + BMI1 // Bit Manipulation Instruction Set 1 + BMI2 // Bit Manipulation Instruction Set 2 + TBM // AMD Trailing Bit Manipulation + LZCNT // LZCNT instruction + POPCNT // POPCNT instruction + AESNI // Advanced Encryption Standard New Instructions + CLMUL // Carry-less Multiplication + HTT // Hyperthreading (enabled) + HLE // Hardware Lock Elision + RTM // Restricted Transactional Memory + RDRAND // RDRAND instruction is available + RDSEED // RDSEED instruction is available + ADX // Intel ADX (Multi-Precision Add-Carry Instruction Extensions) + SHA // Intel SHA Extensions + AVX512F // AVX-512 Foundation + AVX512DQ // AVX-512 Doubleword and Quadword Instructions + AVX512IFMA // AVX-512 Integer Fused Multiply-Add Instructions + AVX512PF // AVX-512 Prefetch Instructions + AVX512ER // AVX-512 Exponential and Reciprocal Instructions + AVX512CD // AVX-512 Conflict Detection Instructions + AVX512BW // AVX-512 Byte and Word Instructions + AVX512VL // AVX-512 Vector Length Extensions + AVX512VBMI // AVX-512 Vector Bit Manipulation Instructions + MPX // Intel MPX (Memory Protection Extensions) + ERMS // Enhanced REP MOVSB/STOSB + RDTSCP // RDTSCP Instruction + CX16 // CMPXCHG16B Instruction + SGX // Software Guard Extensions + IBPB // Indirect Branch Restricted Speculation (IBRS) and Indirect Branch Predictor Barrier (IBPB) + STIBP // Single Thread Indirect Branch Predictors + + // Performance indicators + SSE2SLOW // SSE2 is supported, but usually not faster + SSE3SLOW // SSE3 is supported, but usually not faster + ATOM // Atom processor, some SSSE3 instructions are slower +) + +var flagNames = map[Flags]string{ + CMOV: "CMOV", // i686 CMOV + NX: "NX", // NX (No-Execute) bit + AMD3DNOW: "AMD3DNOW", // AMD 3DNOW + AMD3DNOWEXT: "AMD3DNOWEXT", // AMD 3DNowExt + MMX: "MMX", // Standard MMX + MMXEXT: "MMXEXT", // SSE integer functions or AMD MMX ext + SSE: "SSE", // SSE functions + SSE2: "SSE2", // P4 SSE2 functions + SSE3: "SSE3", // Prescott SSE3 functions + SSSE3: "SSSE3", // Conroe SSSE3 functions + SSE4: "SSE4.1", // Penryn SSE4.1 functions + SSE4A: "SSE4A", // AMD Barcelona microarchitecture SSE4a instructions + SSE42: "SSE4.2", // Nehalem SSE4.2 functions + AVX: "AVX", // AVX functions + AVX2: "AVX2", // AVX functions + FMA3: "FMA3", // Intel FMA 3 + FMA4: "FMA4", // Bulldozer FMA4 functions + XOP: "XOP", // Bulldozer XOP functions + F16C: "F16C", // Half-precision floating-point conversion + BMI1: "BMI1", // Bit Manipulation Instruction Set 1 + BMI2: "BMI2", // Bit Manipulation Instruction Set 2 + TBM: "TBM", // AMD Trailing Bit Manipulation + LZCNT: "LZCNT", // LZCNT instruction + POPCNT: "POPCNT", // POPCNT instruction + AESNI: "AESNI", // Advanced Encryption Standard New Instructions + CLMUL: "CLMUL", // Carry-less Multiplication + HTT: "HTT", // Hyperthreading (enabled) + HLE: "HLE", // Hardware Lock Elision + RTM: "RTM", // Restricted Transactional Memory + RDRAND: "RDRAND", // RDRAND instruction is available + RDSEED: "RDSEED", // RDSEED instruction is available + ADX: "ADX", // Intel ADX (Multi-Precision Add-Carry Instruction Extensions) + SHA: "SHA", // Intel SHA Extensions + AVX512F: "AVX512F", // AVX-512 Foundation + AVX512DQ: "AVX512DQ", // AVX-512 Doubleword and Quadword Instructions + AVX512IFMA: "AVX512IFMA", // AVX-512 Integer Fused Multiply-Add Instructions + AVX512PF: "AVX512PF", // AVX-512 Prefetch Instructions + AVX512ER: "AVX512ER", // AVX-512 Exponential and Reciprocal Instructions + AVX512CD: "AVX512CD", // AVX-512 Conflict Detection Instructions + AVX512BW: "AVX512BW", // AVX-512 Byte and Word Instructions + AVX512VL: "AVX512VL", // AVX-512 Vector Length Extensions + AVX512VBMI: "AVX512VBMI", // AVX-512 Vector Bit Manipulation Instructions + MPX: "MPX", // Intel MPX (Memory Protection Extensions) + ERMS: "ERMS", // Enhanced REP MOVSB/STOSB + RDTSCP: "RDTSCP", // RDTSCP Instruction + CX16: "CX16", // CMPXCHG16B Instruction + SGX: "SGX", // Software Guard Extensions + IBPB: "IBPB", // Indirect Branch Restricted Speculation and Indirect Branch Predictor Barrier + STIBP: "STIBP", // Single Thread Indirect Branch Predictors + + // Performance indicators + SSE2SLOW: "SSE2SLOW", // SSE2 supported, but usually not faster + SSE3SLOW: "SSE3SLOW", // SSE3 supported, but usually not faster + ATOM: "ATOM", // Atom processor, some SSSE3 instructions are slower + +} + +// CPUInfo contains information about the detected system CPU. +type CPUInfo struct { + BrandName string // Brand name reported by the CPU + VendorID Vendor // Comparable CPU vendor ID + Features Flags // Features of the CPU + PhysicalCores int // Number of physical processor cores in your CPU. Will be 0 if undetectable. + ThreadsPerCore int // Number of threads per physical core. Will be 1 if undetectable. + LogicalCores int // Number of physical cores times threads that can run on each core through the use of hyperthreading. Will be 0 if undetectable. + Family int // CPU family number + Model int // CPU model number + CacheLine int // Cache line size in bytes. Will be 0 if undetectable. + Cache struct { + L1I int // L1 Instruction Cache (per core or shared). Will be -1 if undetected + L1D int // L1 Data Cache (per core or shared). Will be -1 if undetected + L2 int // L2 Cache (per core or shared). Will be -1 if undetected + L3 int // L3 Instruction Cache (per core or shared). Will be -1 if undetected + } + SGX SGXSupport + maxFunc uint32 + maxExFunc uint32 +} + +var cpuid func(op uint32) (eax, ebx, ecx, edx uint32) +var cpuidex func(op, op2 uint32) (eax, ebx, ecx, edx uint32) +var xgetbv func(index uint32) (eax, edx uint32) +var rdtscpAsm func() (eax, ebx, ecx, edx uint32) + +// CPU contains information about the CPU as detected on startup, +// or when Detect last was called. +// +// Use this as the primary entry point to you data, +// this way queries are +var CPU CPUInfo + +func init() { + initCPU() + Detect() +} + +// Detect will re-detect current CPU info. +// This will replace the content of the exported CPU variable. +// +// Unless you expect the CPU to change while you are running your program +// you should not need to call this function. +// If you call this, you must ensure that no other goroutine is accessing the +// exported CPU variable. +func Detect() { + CPU.maxFunc = maxFunctionID() + CPU.maxExFunc = maxExtendedFunction() + CPU.BrandName = brandName() + CPU.CacheLine = cacheLine() + CPU.Family, CPU.Model = familyModel() + CPU.Features = support() + CPU.SGX = hasSGX(CPU.Features&SGX != 0) + CPU.ThreadsPerCore = threadsPerCore() + CPU.LogicalCores = logicalCores() + CPU.PhysicalCores = physicalCores() + CPU.VendorID = vendorID() + CPU.cacheSize() +} + +// Generated here: http://play.golang.org/p/BxFH2Gdc0G + +// Cmov indicates support of CMOV instructions +func (c CPUInfo) Cmov() bool { + return c.Features&CMOV != 0 +} + +// Amd3dnow indicates support of AMD 3DNOW! instructions +func (c CPUInfo) Amd3dnow() bool { + return c.Features&AMD3DNOW != 0 +} + +// Amd3dnowExt indicates support of AMD 3DNOW! Extended instructions +func (c CPUInfo) Amd3dnowExt() bool { + return c.Features&AMD3DNOWEXT != 0 +} + +// MMX indicates support of MMX instructions +func (c CPUInfo) MMX() bool { + return c.Features&MMX != 0 +} + +// MMXExt indicates support of MMXEXT instructions +// (SSE integer functions or AMD MMX ext) +func (c CPUInfo) MMXExt() bool { + return c.Features&MMXEXT != 0 +} + +// SSE indicates support of SSE instructions +func (c CPUInfo) SSE() bool { + return c.Features&SSE != 0 +} + +// SSE2 indicates support of SSE 2 instructions +func (c CPUInfo) SSE2() bool { + return c.Features&SSE2 != 0 +} + +// SSE3 indicates support of SSE 3 instructions +func (c CPUInfo) SSE3() bool { + return c.Features&SSE3 != 0 +} + +// SSSE3 indicates support of SSSE 3 instructions +func (c CPUInfo) SSSE3() bool { + return c.Features&SSSE3 != 0 +} + +// SSE4 indicates support of SSE 4 (also called SSE 4.1) instructions +func (c CPUInfo) SSE4() bool { + return c.Features&SSE4 != 0 +} + +// SSE42 indicates support of SSE4.2 instructions +func (c CPUInfo) SSE42() bool { + return c.Features&SSE42 != 0 +} + +// AVX indicates support of AVX instructions +// and operating system support of AVX instructions +func (c CPUInfo) AVX() bool { + return c.Features&AVX != 0 +} + +// AVX2 indicates support of AVX2 instructions +func (c CPUInfo) AVX2() bool { + return c.Features&AVX2 != 0 +} + +// FMA3 indicates support of FMA3 instructions +func (c CPUInfo) FMA3() bool { + return c.Features&FMA3 != 0 +} + +// FMA4 indicates support of FMA4 instructions +func (c CPUInfo) FMA4() bool { + return c.Features&FMA4 != 0 +} + +// XOP indicates support of XOP instructions +func (c CPUInfo) XOP() bool { + return c.Features&XOP != 0 +} + +// F16C indicates support of F16C instructions +func (c CPUInfo) F16C() bool { + return c.Features&F16C != 0 +} + +// BMI1 indicates support of BMI1 instructions +func (c CPUInfo) BMI1() bool { + return c.Features&BMI1 != 0 +} + +// BMI2 indicates support of BMI2 instructions +func (c CPUInfo) BMI2() bool { + return c.Features&BMI2 != 0 +} + +// TBM indicates support of TBM instructions +// (AMD Trailing Bit Manipulation) +func (c CPUInfo) TBM() bool { + return c.Features&TBM != 0 +} + +// Lzcnt indicates support of LZCNT instruction +func (c CPUInfo) Lzcnt() bool { + return c.Features&LZCNT != 0 +} + +// Popcnt indicates support of POPCNT instruction +func (c CPUInfo) Popcnt() bool { + return c.Features&POPCNT != 0 +} + +// HTT indicates the processor has Hyperthreading enabled +func (c CPUInfo) HTT() bool { + return c.Features&HTT != 0 +} + +// SSE2Slow indicates that SSE2 may be slow on this processor +func (c CPUInfo) SSE2Slow() bool { + return c.Features&SSE2SLOW != 0 +} + +// SSE3Slow indicates that SSE3 may be slow on this processor +func (c CPUInfo) SSE3Slow() bool { + return c.Features&SSE3SLOW != 0 +} + +// AesNi indicates support of AES-NI instructions +// (Advanced Encryption Standard New Instructions) +func (c CPUInfo) AesNi() bool { + return c.Features&AESNI != 0 +} + +// Clmul indicates support of CLMUL instructions +// (Carry-less Multiplication) +func (c CPUInfo) Clmul() bool { + return c.Features&CLMUL != 0 +} + +// NX indicates support of NX (No-Execute) bit +func (c CPUInfo) NX() bool { + return c.Features&NX != 0 +} + +// SSE4A indicates support of AMD Barcelona microarchitecture SSE4a instructions +func (c CPUInfo) SSE4A() bool { + return c.Features&SSE4A != 0 +} + +// HLE indicates support of Hardware Lock Elision +func (c CPUInfo) HLE() bool { + return c.Features&HLE != 0 +} + +// RTM indicates support of Restricted Transactional Memory +func (c CPUInfo) RTM() bool { + return c.Features&RTM != 0 +} + +// Rdrand indicates support of RDRAND instruction is available +func (c CPUInfo) Rdrand() bool { + return c.Features&RDRAND != 0 +} + +// Rdseed indicates support of RDSEED instruction is available +func (c CPUInfo) Rdseed() bool { + return c.Features&RDSEED != 0 +} + +// ADX indicates support of Intel ADX (Multi-Precision Add-Carry Instruction Extensions) +func (c CPUInfo) ADX() bool { + return c.Features&ADX != 0 +} + +// SHA indicates support of Intel SHA Extensions +func (c CPUInfo) SHA() bool { + return c.Features&SHA != 0 +} + +// AVX512F indicates support of AVX-512 Foundation +func (c CPUInfo) AVX512F() bool { + return c.Features&AVX512F != 0 +} + +// AVX512DQ indicates support of AVX-512 Doubleword and Quadword Instructions +func (c CPUInfo) AVX512DQ() bool { + return c.Features&AVX512DQ != 0 +} + +// AVX512IFMA indicates support of AVX-512 Integer Fused Multiply-Add Instructions +func (c CPUInfo) AVX512IFMA() bool { + return c.Features&AVX512IFMA != 0 +} + +// AVX512PF indicates support of AVX-512 Prefetch Instructions +func (c CPUInfo) AVX512PF() bool { + return c.Features&AVX512PF != 0 +} + +// AVX512ER indicates support of AVX-512 Exponential and Reciprocal Instructions +func (c CPUInfo) AVX512ER() bool { + return c.Features&AVX512ER != 0 +} + +// AVX512CD indicates support of AVX-512 Conflict Detection Instructions +func (c CPUInfo) AVX512CD() bool { + return c.Features&AVX512CD != 0 +} + +// AVX512BW indicates support of AVX-512 Byte and Word Instructions +func (c CPUInfo) AVX512BW() bool { + return c.Features&AVX512BW != 0 +} + +// AVX512VL indicates support of AVX-512 Vector Length Extensions +func (c CPUInfo) AVX512VL() bool { + return c.Features&AVX512VL != 0 +} + +// AVX512VBMI indicates support of AVX-512 Vector Bit Manipulation Instructions +func (c CPUInfo) AVX512VBMI() bool { + return c.Features&AVX512VBMI != 0 +} + +// MPX indicates support of Intel MPX (Memory Protection Extensions) +func (c CPUInfo) MPX() bool { + return c.Features&MPX != 0 +} + +// ERMS indicates support of Enhanced REP MOVSB/STOSB +func (c CPUInfo) ERMS() bool { + return c.Features&ERMS != 0 +} + +// RDTSCP Instruction is available. +func (c CPUInfo) RDTSCP() bool { + return c.Features&RDTSCP != 0 +} + +// CX16 indicates if CMPXCHG16B instruction is available. +func (c CPUInfo) CX16() bool { + return c.Features&CX16 != 0 +} + +// TSX is split into HLE (Hardware Lock Elision) and RTM (Restricted Transactional Memory) detection. +// So TSX simply checks that. +func (c CPUInfo) TSX() bool { + return c.Features&(HLE|RTM) == HLE|RTM +} + +// Atom indicates an Atom processor +func (c CPUInfo) Atom() bool { + return c.Features&ATOM != 0 +} + +// Intel returns true if vendor is recognized as Intel +func (c CPUInfo) Intel() bool { + return c.VendorID == Intel +} + +// AMD returns true if vendor is recognized as AMD +func (c CPUInfo) AMD() bool { + return c.VendorID == AMD +} + +// Transmeta returns true if vendor is recognized as Transmeta +func (c CPUInfo) Transmeta() bool { + return c.VendorID == Transmeta +} + +// NSC returns true if vendor is recognized as National Semiconductor +func (c CPUInfo) NSC() bool { + return c.VendorID == NSC +} + +// VIA returns true if vendor is recognized as VIA +func (c CPUInfo) VIA() bool { + return c.VendorID == VIA +} + +// RTCounter returns the 64-bit time-stamp counter +// Uses the RDTSCP instruction. The value 0 is returned +// if the CPU does not support the instruction. +func (c CPUInfo) RTCounter() uint64 { + if !c.RDTSCP() { + return 0 + } + a, _, _, d := rdtscpAsm() + return uint64(a) | (uint64(d) << 32) +} + +// Ia32TscAux returns the IA32_TSC_AUX part of the RDTSCP. +// This variable is OS dependent, but on Linux contains information +// about the current cpu/core the code is running on. +// If the RDTSCP instruction isn't supported on the CPU, the value 0 is returned. +func (c CPUInfo) Ia32TscAux() uint32 { + if !c.RDTSCP() { + return 0 + } + _, _, ecx, _ := rdtscpAsm() + return ecx +} + +// LogicalCPU will return the Logical CPU the code is currently executing on. +// This is likely to change when the OS re-schedules the running thread +// to another CPU. +// If the current core cannot be detected, -1 will be returned. +func (c CPUInfo) LogicalCPU() int { + if c.maxFunc < 1 { + return -1 + } + _, ebx, _, _ := cpuid(1) + return int(ebx >> 24) +} + +// VM Will return true if the cpu id indicates we are in +// a virtual machine. This is only a hint, and will very likely +// have many false negatives. +func (c CPUInfo) VM() bool { + switch c.VendorID { + case MSVM, KVM, VMware, XenHVM: + return true + } + return false +} + +// Flags contains detected cpu features and caracteristics +type Flags uint64 + +// String returns a string representation of the detected +// CPU features. +func (f Flags) String() string { + return strings.Join(f.Strings(), ",") +} + +// Strings returns and array of the detected features. +func (f Flags) Strings() []string { + s := support() + r := make([]string, 0, 20) + for i := uint(0); i < 64; i++ { + key := Flags(1 << i) + val := flagNames[key] + if s&key != 0 { + r = append(r, val) + } + } + return r +} + +func maxExtendedFunction() uint32 { + eax, _, _, _ := cpuid(0x80000000) + return eax +} + +func maxFunctionID() uint32 { + a, _, _, _ := cpuid(0) + return a +} + +func brandName() string { + if maxExtendedFunction() >= 0x80000004 { + v := make([]uint32, 0, 48) + for i := uint32(0); i < 3; i++ { + a, b, c, d := cpuid(0x80000002 + i) + v = append(v, a, b, c, d) + } + return strings.Trim(string(valAsString(v...)), " ") + } + return "unknown" +} + +func threadsPerCore() int { + mfi := maxFunctionID() + if mfi < 0x4 || vendorID() != Intel { + return 1 + } + + if mfi < 0xb { + _, b, _, d := cpuid(1) + if (d & (1 << 28)) != 0 { + // v will contain logical core count + v := (b >> 16) & 255 + if v > 1 { + a4, _, _, _ := cpuid(4) + // physical cores + v2 := (a4 >> 26) + 1 + if v2 > 0 { + return int(v) / int(v2) + } + } + } + return 1 + } + _, b, _, _ := cpuidex(0xb, 0) + if b&0xffff == 0 { + return 1 + } + return int(b & 0xffff) +} + +func logicalCores() int { + mfi := maxFunctionID() + switch vendorID() { + case Intel: + // Use this on old Intel processors + if mfi < 0xb { + if mfi < 1 { + return 0 + } + // CPUID.1:EBX[23:16] represents the maximum number of addressable IDs (initial APIC ID) + // that can be assigned to logical processors in a physical package. + // The value may not be the same as the number of logical processors that are present in the hardware of a physical package. + _, ebx, _, _ := cpuid(1) + logical := (ebx >> 16) & 0xff + return int(logical) + } + _, b, _, _ := cpuidex(0xb, 1) + return int(b & 0xffff) + case AMD: + _, b, _, _ := cpuid(1) + return int((b >> 16) & 0xff) + default: + return 0 + } +} + +func familyModel() (int, int) { + if maxFunctionID() < 0x1 { + return 0, 0 + } + eax, _, _, _ := cpuid(1) + family := ((eax >> 8) & 0xf) + ((eax >> 20) & 0xff) + model := ((eax >> 4) & 0xf) + ((eax >> 12) & 0xf0) + return int(family), int(model) +} + +func physicalCores() int { + switch vendorID() { + case Intel: + return logicalCores() / threadsPerCore() + case AMD: + if maxExtendedFunction() >= 0x80000008 { + _, _, c, _ := cpuid(0x80000008) + return int(c&0xff) + 1 + } + } + return 0 +} + +// Except from http://en.wikipedia.org/wiki/CPUID#EAX.3D0:_Get_vendor_ID +var vendorMapping = map[string]Vendor{ + "AMDisbetter!": AMD, + "AuthenticAMD": AMD, + "CentaurHauls": VIA, + "GenuineIntel": Intel, + "TransmetaCPU": Transmeta, + "GenuineTMx86": Transmeta, + "Geode by NSC": NSC, + "VIA VIA VIA ": VIA, + "KVMKVMKVMKVM": KVM, + "Microsoft Hv": MSVM, + "VMwareVMware": VMware, + "XenVMMXenVMM": XenHVM, +} + +func vendorID() Vendor { + _, b, c, d := cpuid(0) + v := valAsString(b, d, c) + vend, ok := vendorMapping[string(v)] + if !ok { + return Other + } + return vend +} + +func cacheLine() int { + if maxFunctionID() < 0x1 { + return 0 + } + + _, ebx, _, _ := cpuid(1) + cache := (ebx & 0xff00) >> 5 // cflush size + if cache == 0 && maxExtendedFunction() >= 0x80000006 { + _, _, ecx, _ := cpuid(0x80000006) + cache = ecx & 0xff // cacheline size + } + // TODO: Read from Cache and TLB Information + return int(cache) +} + +func (c *CPUInfo) cacheSize() { + c.Cache.L1D = -1 + c.Cache.L1I = -1 + c.Cache.L2 = -1 + c.Cache.L3 = -1 + vendor := vendorID() + switch vendor { + case Intel: + if maxFunctionID() < 4 { + return + } + for i := uint32(0); ; i++ { + eax, ebx, ecx, _ := cpuidex(4, i) + cacheType := eax & 15 + if cacheType == 0 { + break + } + cacheLevel := (eax >> 5) & 7 + coherency := int(ebx&0xfff) + 1 + partitions := int((ebx>>12)&0x3ff) + 1 + associativity := int((ebx>>22)&0x3ff) + 1 + sets := int(ecx) + 1 + size := associativity * partitions * coherency * sets + switch cacheLevel { + case 1: + if cacheType == 1 { + // 1 = Data Cache + c.Cache.L1D = size + } else if cacheType == 2 { + // 2 = Instruction Cache + c.Cache.L1I = size + } else { + if c.Cache.L1D < 0 { + c.Cache.L1I = size + } + if c.Cache.L1I < 0 { + c.Cache.L1I = size + } + } + case 2: + c.Cache.L2 = size + case 3: + c.Cache.L3 = size + } + } + case AMD: + // Untested. + if maxExtendedFunction() < 0x80000005 { + return + } + _, _, ecx, edx := cpuid(0x80000005) + c.Cache.L1D = int(((ecx >> 24) & 0xFF) * 1024) + c.Cache.L1I = int(((edx >> 24) & 0xFF) * 1024) + + if maxExtendedFunction() < 0x80000006 { + return + } + _, _, ecx, _ = cpuid(0x80000006) + c.Cache.L2 = int(((ecx >> 16) & 0xFFFF) * 1024) + } + + return +} + +type SGXSupport struct { + Available bool + SGX1Supported bool + SGX2Supported bool + MaxEnclaveSizeNot64 int64 + MaxEnclaveSize64 int64 +} + +func hasSGX(available bool) (rval SGXSupport) { + rval.Available = available + + if !available { + return + } + + a, _, _, d := cpuidex(0x12, 0) + rval.SGX1Supported = a&0x01 != 0 + rval.SGX2Supported = a&0x02 != 0 + rval.MaxEnclaveSizeNot64 = 1 << (d & 0xFF) // pow 2 + rval.MaxEnclaveSize64 = 1 << ((d >> 8) & 0xFF) // pow 2 + + return +} + +func support() Flags { + mfi := maxFunctionID() + vend := vendorID() + if mfi < 0x1 { + return 0 + } + rval := uint64(0) + _, _, c, d := cpuid(1) + if (d & (1 << 15)) != 0 { + rval |= CMOV + } + if (d & (1 << 23)) != 0 { + rval |= MMX + } + if (d & (1 << 25)) != 0 { + rval |= MMXEXT + } + if (d & (1 << 25)) != 0 { + rval |= SSE + } + if (d & (1 << 26)) != 0 { + rval |= SSE2 + } + if (c & 1) != 0 { + rval |= SSE3 + } + if (c & 0x00000200) != 0 { + rval |= SSSE3 + } + if (c & 0x00080000) != 0 { + rval |= SSE4 + } + if (c & 0x00100000) != 0 { + rval |= SSE42 + } + if (c & (1 << 25)) != 0 { + rval |= AESNI + } + if (c & (1 << 1)) != 0 { + rval |= CLMUL + } + if c&(1<<23) != 0 { + rval |= POPCNT + } + if c&(1<<30) != 0 { + rval |= RDRAND + } + if c&(1<<29) != 0 { + rval |= F16C + } + if c&(1<<13) != 0 { + rval |= CX16 + } + if vend == Intel && (d&(1<<28)) != 0 && mfi >= 4 { + if threadsPerCore() > 1 { + rval |= HTT + } + } + + // Check XGETBV, OXSAVE and AVX bits + if c&(1<<26) != 0 && c&(1<<27) != 0 && c&(1<<28) != 0 { + // Check for OS support + eax, _ := xgetbv(0) + if (eax & 0x6) == 0x6 { + rval |= AVX + if (c & 0x00001000) != 0 { + rval |= FMA3 + } + } + } + + // Check AVX2, AVX2 requires OS support, but BMI1/2 don't. + if mfi >= 7 { + _, ebx, ecx, edx := cpuidex(7, 0) + if (rval&AVX) != 0 && (ebx&0x00000020) != 0 { + rval |= AVX2 + } + if (ebx & 0x00000008) != 0 { + rval |= BMI1 + if (ebx & 0x00000100) != 0 { + rval |= BMI2 + } + } + if ebx&(1<<2) != 0 { + rval |= SGX + } + if ebx&(1<<4) != 0 { + rval |= HLE + } + if ebx&(1<<9) != 0 { + rval |= ERMS + } + if ebx&(1<<11) != 0 { + rval |= RTM + } + if ebx&(1<<14) != 0 { + rval |= MPX + } + if ebx&(1<<18) != 0 { + rval |= RDSEED + } + if ebx&(1<<19) != 0 { + rval |= ADX + } + if ebx&(1<<29) != 0 { + rval |= SHA + } + if edx&(1<<26) != 0 { + rval |= IBPB + } + if edx&(1<<27) != 0 { + rval |= STIBP + } + + // Only detect AVX-512 features if XGETBV is supported + if c&((1<<26)|(1<<27)) == (1<<26)|(1<<27) { + // Check for OS support + eax, _ := xgetbv(0) + + // Verify that XCR0[7:5] = ‘111b’ (OPMASK state, upper 256-bit of ZMM0-ZMM15 and + // ZMM16-ZMM31 state are enabled by OS) + /// and that XCR0[2:1] = ‘11b’ (XMM state and YMM state are enabled by OS). + if (eax>>5)&7 == 7 && (eax>>1)&3 == 3 { + if ebx&(1<<16) != 0 { + rval |= AVX512F + } + if ebx&(1<<17) != 0 { + rval |= AVX512DQ + } + if ebx&(1<<21) != 0 { + rval |= AVX512IFMA + } + if ebx&(1<<26) != 0 { + rval |= AVX512PF + } + if ebx&(1<<27) != 0 { + rval |= AVX512ER + } + if ebx&(1<<28) != 0 { + rval |= AVX512CD + } + if ebx&(1<<30) != 0 { + rval |= AVX512BW + } + if ebx&(1<<31) != 0 { + rval |= AVX512VL + } + // ecx + if ecx&(1<<1) != 0 { + rval |= AVX512VBMI + } + } + } + } + + if maxExtendedFunction() >= 0x80000001 { + _, _, c, d := cpuid(0x80000001) + if (c & (1 << 5)) != 0 { + rval |= LZCNT + rval |= POPCNT + } + if (d & (1 << 31)) != 0 { + rval |= AMD3DNOW + } + if (d & (1 << 30)) != 0 { + rval |= AMD3DNOWEXT + } + if (d & (1 << 23)) != 0 { + rval |= MMX + } + if (d & (1 << 22)) != 0 { + rval |= MMXEXT + } + if (c & (1 << 6)) != 0 { + rval |= SSE4A + } + if d&(1<<20) != 0 { + rval |= NX + } + if d&(1<<27) != 0 { + rval |= RDTSCP + } + + /* Allow for selectively disabling SSE2 functions on AMD processors + with SSE2 support but not SSE4a. This includes Athlon64, some + Opteron, and some Sempron processors. MMX, SSE, or 3DNow! are faster + than SSE2 often enough to utilize this special-case flag. + AV_CPU_FLAG_SSE2 and AV_CPU_FLAG_SSE2SLOW are both set in this case + so that SSE2 is used unless explicitly disabled by checking + AV_CPU_FLAG_SSE2SLOW. */ + if vendorID() != Intel && + rval&SSE2 != 0 && (c&0x00000040) == 0 { + rval |= SSE2SLOW + } + + /* XOP and FMA4 use the AVX instruction coding scheme, so they can't be + * used unless the OS has AVX support. */ + if (rval & AVX) != 0 { + if (c & 0x00000800) != 0 { + rval |= XOP + } + if (c & 0x00010000) != 0 { + rval |= FMA4 + } + } + + if vendorID() == Intel { + family, model := familyModel() + if family == 6 && (model == 9 || model == 13 || model == 14) { + /* 6/9 (pentium-m "banias"), 6/13 (pentium-m "dothan"), and + * 6/14 (core1 "yonah") theoretically support sse2, but it's + * usually slower than mmx. */ + if (rval & SSE2) != 0 { + rval |= SSE2SLOW + } + if (rval & SSE3) != 0 { + rval |= SSE3SLOW + } + } + /* The Atom processor has SSSE3 support, which is useful in many cases, + * but sometimes the SSSE3 version is slower than the SSE2 equivalent + * on the Atom, but is generally faster on other processors supporting + * SSSE3. This flag allows for selectively disabling certain SSSE3 + * functions on the Atom. */ + if family == 6 && model == 28 { + rval |= ATOM + } + } + } + return Flags(rval) +} + +func valAsString(values ...uint32) []byte { + r := make([]byte, 4*len(values)) + for i, v := range values { + dst := r[i*4:] + dst[0] = byte(v & 0xff) + dst[1] = byte((v >> 8) & 0xff) + dst[2] = byte((v >> 16) & 0xff) + dst[3] = byte((v >> 24) & 0xff) + switch { + case dst[0] == 0: + return r[:i*4] + case dst[1] == 0: + return r[:i*4+1] + case dst[2] == 0: + return r[:i*4+2] + case dst[3] == 0: + return r[:i*4+3] + } + } + return r +} diff --git a/vendor/github.com/klauspost/cpuid/cpuid_386.s b/vendor/github.com/klauspost/cpuid/cpuid_386.s new file mode 100644 index 0000000..4d73171 --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/cpuid_386.s @@ -0,0 +1,42 @@ +// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file. + +// +build 386,!gccgo + +// func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32) +TEXT ·asmCpuid(SB), 7, $0 + XORL CX, CX + MOVL op+0(FP), AX + CPUID + MOVL AX, eax+4(FP) + MOVL BX, ebx+8(FP) + MOVL CX, ecx+12(FP) + MOVL DX, edx+16(FP) + RET + +// func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32) +TEXT ·asmCpuidex(SB), 7, $0 + MOVL op+0(FP), AX + MOVL op2+4(FP), CX + CPUID + MOVL AX, eax+8(FP) + MOVL BX, ebx+12(FP) + MOVL CX, ecx+16(FP) + MOVL DX, edx+20(FP) + RET + +// func xgetbv(index uint32) (eax, edx uint32) +TEXT ·asmXgetbv(SB), 7, $0 + MOVL index+0(FP), CX + BYTE $0x0f; BYTE $0x01; BYTE $0xd0 // XGETBV + MOVL AX, eax+4(FP) + MOVL DX, edx+8(FP) + RET + +// func asmRdtscpAsm() (eax, ebx, ecx, edx uint32) +TEXT ·asmRdtscpAsm(SB), 7, $0 + BYTE $0x0F; BYTE $0x01; BYTE $0xF9 // RDTSCP + MOVL AX, eax+0(FP) + MOVL BX, ebx+4(FP) + MOVL CX, ecx+8(FP) + MOVL DX, edx+12(FP) + RET diff --git a/vendor/github.com/klauspost/cpuid/cpuid_amd64.s b/vendor/github.com/klauspost/cpuid/cpuid_amd64.s new file mode 100644 index 0000000..3c1d60e --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/cpuid_amd64.s @@ -0,0 +1,42 @@ +// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file. + +//+build amd64,!gccgo + +// func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32) +TEXT ·asmCpuid(SB), 7, $0 + XORQ CX, CX + MOVL op+0(FP), AX + CPUID + MOVL AX, eax+8(FP) + MOVL BX, ebx+12(FP) + MOVL CX, ecx+16(FP) + MOVL DX, edx+20(FP) + RET + +// func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32) +TEXT ·asmCpuidex(SB), 7, $0 + MOVL op+0(FP), AX + MOVL op2+4(FP), CX + CPUID + MOVL AX, eax+8(FP) + MOVL BX, ebx+12(FP) + MOVL CX, ecx+16(FP) + MOVL DX, edx+20(FP) + RET + +// func asmXgetbv(index uint32) (eax, edx uint32) +TEXT ·asmXgetbv(SB), 7, $0 + MOVL index+0(FP), CX + BYTE $0x0f; BYTE $0x01; BYTE $0xd0 // XGETBV + MOVL AX, eax+8(FP) + MOVL DX, edx+12(FP) + RET + +// func asmRdtscpAsm() (eax, ebx, ecx, edx uint32) +TEXT ·asmRdtscpAsm(SB), 7, $0 + BYTE $0x0F; BYTE $0x01; BYTE $0xF9 // RDTSCP + MOVL AX, eax+0(FP) + MOVL BX, ebx+4(FP) + MOVL CX, ecx+8(FP) + MOVL DX, edx+12(FP) + RET diff --git a/vendor/github.com/klauspost/cpuid/detect_intel.go b/vendor/github.com/klauspost/cpuid/detect_intel.go new file mode 100644 index 0000000..a5f04dd --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/detect_intel.go @@ -0,0 +1,17 @@ +// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file. + +// +build 386,!gccgo amd64,!gccgo + +package cpuid + +func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32) +func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32) +func asmXgetbv(index uint32) (eax, edx uint32) +func asmRdtscpAsm() (eax, ebx, ecx, edx uint32) + +func initCPU() { + cpuid = asmCpuid + cpuidex = asmCpuidex + xgetbv = asmXgetbv + rdtscpAsm = asmRdtscpAsm +} diff --git a/vendor/github.com/klauspost/cpuid/detect_ref.go b/vendor/github.com/klauspost/cpuid/detect_ref.go new file mode 100644 index 0000000..909c5d9 --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/detect_ref.go @@ -0,0 +1,23 @@ +// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file. + +// +build !amd64,!386 gccgo + +package cpuid + +func initCPU() { + cpuid = func(op uint32) (eax, ebx, ecx, edx uint32) { + return 0, 0, 0, 0 + } + + cpuidex = func(op, op2 uint32) (eax, ebx, ecx, edx uint32) { + return 0, 0, 0, 0 + } + + xgetbv = func(index uint32) (eax, edx uint32) { + return 0, 0 + } + + rdtscpAsm = func() (eax, ebx, ecx, edx uint32) { + return 0, 0, 0, 0 + } +} diff --git a/vendor/github.com/klauspost/cpuid/generate.go b/vendor/github.com/klauspost/cpuid/generate.go new file mode 100644 index 0000000..90e7a98 --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/generate.go @@ -0,0 +1,4 @@ +package cpuid + +//go:generate go run private-gen.go +//go:generate gofmt -w ./private diff --git a/vendor/github.com/klauspost/cpuid/private-gen.go b/vendor/github.com/klauspost/cpuid/private-gen.go new file mode 100644 index 0000000..437333d --- /dev/null +++ b/vendor/github.com/klauspost/cpuid/private-gen.go @@ -0,0 +1,476 @@ +// +build ignore + +package main + +import ( + "bytes" + "fmt" + "go/ast" + "go/parser" + "go/printer" + "go/token" + "io" + "io/ioutil" + "log" + "os" + "reflect" + "strings" + "unicode" + "unicode/utf8" +) + +var inFiles = []string{"cpuid.go", "cpuid_test.go"} +var copyFiles = []string{"cpuid_amd64.s", "cpuid_386.s", "detect_ref.go", "detect_intel.go"} +var fileSet = token.NewFileSet() +var reWrites = []rewrite{ + initRewrite("CPUInfo -> cpuInfo"), + initRewrite("Vendor -> vendor"), + initRewrite("Flags -> flags"), + initRewrite("Detect -> detect"), + initRewrite("CPU -> cpu"), +} +var excludeNames = map[string]bool{"string": true, "join": true, "trim": true, + // cpuid_test.go + "t": true, "println": true, "logf": true, "log": true, "fatalf": true, "fatal": true, +} + +var excludePrefixes = []string{"test", "benchmark"} + +func main() { + Package := "private" + parserMode := parser.ParseComments + exported := make(map[string]rewrite) + for _, file := range inFiles { + in, err := os.Open(file) + if err != nil { + log.Fatalf("opening input", err) + } + + src, err := ioutil.ReadAll(in) + if err != nil { + log.Fatalf("reading input", err) + } + + astfile, err := parser.ParseFile(fileSet, file, src, parserMode) + if err != nil { + log.Fatalf("parsing input", err) + } + + for _, rw := range reWrites { + astfile = rw(astfile) + } + + // Inspect the AST and print all identifiers and literals. + var startDecl token.Pos + var endDecl token.Pos + ast.Inspect(astfile, func(n ast.Node) bool { + var s string + switch x := n.(type) { + case *ast.Ident: + if x.IsExported() { + t := strings.ToLower(x.Name) + for _, pre := range excludePrefixes { + if strings.HasPrefix(t, pre) { + return true + } + } + if excludeNames[t] != true { + //if x.Pos() > startDecl && x.Pos() < endDecl { + exported[x.Name] = initRewrite(x.Name + " -> " + t) + } + } + + case *ast.GenDecl: + if x.Tok == token.CONST && x.Lparen > 0 { + startDecl = x.Lparen + endDecl = x.Rparen + // fmt.Printf("Decl:%s -> %s\n", fileSet.Position(startDecl), fileSet.Position(endDecl)) + } + } + if s != "" { + fmt.Printf("%s:\t%s\n", fileSet.Position(n.Pos()), s) + } + return true + }) + + for _, rw := range exported { + astfile = rw(astfile) + } + + var buf bytes.Buffer + + printer.Fprint(&buf, fileSet, astfile) + + // Remove package documentation and insert information + s := buf.String() + ind := strings.Index(buf.String(), "\npackage cpuid") + s = s[ind:] + s = "// Generated, DO NOT EDIT,\n" + + "// but copy it to your own project and rename the package.\n" + + "// See more at http://github.com/klauspost/cpuid\n" + + s + + outputName := Package + string(os.PathSeparator) + file + + err = ioutil.WriteFile(outputName, []byte(s), 0644) + if err != nil { + log.Fatalf("writing output: %s", err) + } + log.Println("Generated", outputName) + } + + for _, file := range copyFiles { + dst := "" + if strings.HasPrefix(file, "cpuid") { + dst = Package + string(os.PathSeparator) + file + } else { + dst = Package + string(os.PathSeparator) + "cpuid_" + file + } + err := copyFile(file, dst) + if err != nil { + log.Fatalf("copying file: %s", err) + } + log.Println("Copied", dst) + } +} + +// CopyFile copies a file from src to dst. If src and dst files exist, and are +// the same, then return success. Copy the file contents from src to dst. +func copyFile(src, dst string) (err error) { + sfi, err := os.Stat(src) + if err != nil { + return + } + if !sfi.Mode().IsRegular() { + // cannot copy non-regular files (e.g., directories, + // symlinks, devices, etc.) + return fmt.Errorf("CopyFile: non-regular source file %s (%q)", sfi.Name(), sfi.Mode().String()) + } + dfi, err := os.Stat(dst) + if err != nil { + if !os.IsNotExist(err) { + return + } + } else { + if !(dfi.Mode().IsRegular()) { + return fmt.Errorf("CopyFile: non-regular destination file %s (%q)", dfi.Name(), dfi.Mode().String()) + } + if os.SameFile(sfi, dfi) { + return + } + } + err = copyFileContents(src, dst) + return +} + +// copyFileContents copies the contents of the file named src to the file named +// by dst. The file will be created if it does not already exist. If the +// destination file exists, all it's contents will be replaced by the contents +// of the source file. +func copyFileContents(src, dst string) (err error) { + in, err := os.Open(src) + if err != nil { + return + } + defer in.Close() + out, err := os.Create(dst) + if err != nil { + return + } + defer func() { + cerr := out.Close() + if err == nil { + err = cerr + } + }() + if _, err = io.Copy(out, in); err != nil { + return + } + err = out.Sync() + return +} + +type rewrite func(*ast.File) *ast.File + +// Mostly copied from gofmt +func initRewrite(rewriteRule string) rewrite { + f := strings.Split(rewriteRule, "->") + if len(f) != 2 { + fmt.Fprintf(os.Stderr, "rewrite rule must be of the form 'pattern -> replacement'\n") + os.Exit(2) + } + pattern := parseExpr(f[0], "pattern") + replace := parseExpr(f[1], "replacement") + return func(p *ast.File) *ast.File { return rewriteFile(pattern, replace, p) } +} + +// parseExpr parses s as an expression. +// It might make sense to expand this to allow statement patterns, +// but there are problems with preserving formatting and also +// with what a wildcard for a statement looks like. +func parseExpr(s, what string) ast.Expr { + x, err := parser.ParseExpr(s) + if err != nil { + fmt.Fprintf(os.Stderr, "parsing %s %s at %s\n", what, s, err) + os.Exit(2) + } + return x +} + +// Keep this function for debugging. +/* +func dump(msg string, val reflect.Value) { + fmt.Printf("%s:\n", msg) + ast.Print(fileSet, val.Interface()) + fmt.Println() +} +*/ + +// rewriteFile applies the rewrite rule 'pattern -> replace' to an entire file. +func rewriteFile(pattern, replace ast.Expr, p *ast.File) *ast.File { + cmap := ast.NewCommentMap(fileSet, p, p.Comments) + m := make(map[string]reflect.Value) + pat := reflect.ValueOf(pattern) + repl := reflect.ValueOf(replace) + + var rewriteVal func(val reflect.Value) reflect.Value + rewriteVal = func(val reflect.Value) reflect.Value { + // don't bother if val is invalid to start with + if !val.IsValid() { + return reflect.Value{} + } + for k := range m { + delete(m, k) + } + val = apply(rewriteVal, val) + if match(m, pat, val) { + val = subst(m, repl, reflect.ValueOf(val.Interface().(ast.Node).Pos())) + } + return val + } + + r := apply(rewriteVal, reflect.ValueOf(p)).Interface().(*ast.File) + r.Comments = cmap.Filter(r).Comments() // recreate comments list + return r +} + +// set is a wrapper for x.Set(y); it protects the caller from panics if x cannot be changed to y. +func set(x, y reflect.Value) { + // don't bother if x cannot be set or y is invalid + if !x.CanSet() || !y.IsValid() { + return + } + defer func() { + if x := recover(); x != nil { + if s, ok := x.(string); ok && + (strings.Contains(s, "type mismatch") || strings.Contains(s, "not assignable")) { + // x cannot be set to y - ignore this rewrite + return + } + panic(x) + } + }() + x.Set(y) +} + +// Values/types for special cases. +var ( + objectPtrNil = reflect.ValueOf((*ast.Object)(nil)) + scopePtrNil = reflect.ValueOf((*ast.Scope)(nil)) + + identType = reflect.TypeOf((*ast.Ident)(nil)) + objectPtrType = reflect.TypeOf((*ast.Object)(nil)) + positionType = reflect.TypeOf(token.NoPos) + callExprType = reflect.TypeOf((*ast.CallExpr)(nil)) + scopePtrType = reflect.TypeOf((*ast.Scope)(nil)) +) + +// apply replaces each AST field x in val with f(x), returning val. +// To avoid extra conversions, f operates on the reflect.Value form. +func apply(f func(reflect.Value) reflect.Value, val reflect.Value) reflect.Value { + if !val.IsValid() { + return reflect.Value{} + } + + // *ast.Objects introduce cycles and are likely incorrect after + // rewrite; don't follow them but replace with nil instead + if val.Type() == objectPtrType { + return objectPtrNil + } + + // similarly for scopes: they are likely incorrect after a rewrite; + // replace them with nil + if val.Type() == scopePtrType { + return scopePtrNil + } + + switch v := reflect.Indirect(val); v.Kind() { + case reflect.Slice: + for i := 0; i < v.Len(); i++ { + e := v.Index(i) + set(e, f(e)) + } + case reflect.Struct: + for i := 0; i < v.NumField(); i++ { + e := v.Field(i) + set(e, f(e)) + } + case reflect.Interface: + e := v.Elem() + set(v, f(e)) + } + return val +} + +func isWildcard(s string) bool { + rune, size := utf8.DecodeRuneInString(s) + return size == len(s) && unicode.IsLower(rune) +} + +// match returns true if pattern matches val, +// recording wildcard submatches in m. +// If m == nil, match checks whether pattern == val. +func match(m map[string]reflect.Value, pattern, val reflect.Value) bool { + // Wildcard matches any expression. If it appears multiple + // times in the pattern, it must match the same expression + // each time. + if m != nil && pattern.IsValid() && pattern.Type() == identType { + name := pattern.Interface().(*ast.Ident).Name + if isWildcard(name) && val.IsValid() { + // wildcards only match valid (non-nil) expressions. + if _, ok := val.Interface().(ast.Expr); ok && !val.IsNil() { + if old, ok := m[name]; ok { + return match(nil, old, val) + } + m[name] = val + return true + } + } + } + + // Otherwise, pattern and val must match recursively. + if !pattern.IsValid() || !val.IsValid() { + return !pattern.IsValid() && !val.IsValid() + } + if pattern.Type() != val.Type() { + return false + } + + // Special cases. + switch pattern.Type() { + case identType: + // For identifiers, only the names need to match + // (and none of the other *ast.Object information). + // This is a common case, handle it all here instead + // of recursing down any further via reflection. + p := pattern.Interface().(*ast.Ident) + v := val.Interface().(*ast.Ident) + return p == nil && v == nil || p != nil && v != nil && p.Name == v.Name + case objectPtrType, positionType: + // object pointers and token positions always match + return true + case callExprType: + // For calls, the Ellipsis fields (token.Position) must + // match since that is how f(x) and f(x...) are different. + // Check them here but fall through for the remaining fields. + p := pattern.Interface().(*ast.CallExpr) + v := val.Interface().(*ast.CallExpr) + if p.Ellipsis.IsValid() != v.Ellipsis.IsValid() { + return false + } + } + + p := reflect.Indirect(pattern) + v := reflect.Indirect(val) + if !p.IsValid() || !v.IsValid() { + return !p.IsValid() && !v.IsValid() + } + + switch p.Kind() { + case reflect.Slice: + if p.Len() != v.Len() { + return false + } + for i := 0; i < p.Len(); i++ { + if !match(m, p.Index(i), v.Index(i)) { + return false + } + } + return true + + case reflect.Struct: + for i := 0; i < p.NumField(); i++ { + if !match(m, p.Field(i), v.Field(i)) { + return false + } + } + return true + + case reflect.Interface: + return match(m, p.Elem(), v.Elem()) + } + + // Handle token integers, etc. + return p.Interface() == v.Interface() +} + +// subst returns a copy of pattern with values from m substituted in place +// of wildcards and pos used as the position of tokens from the pattern. +// if m == nil, subst returns a copy of pattern and doesn't change the line +// number information. +func subst(m map[string]reflect.Value, pattern reflect.Value, pos reflect.Value) reflect.Value { + if !pattern.IsValid() { + return reflect.Value{} + } + + // Wildcard gets replaced with map value. + if m != nil && pattern.Type() == identType { + name := pattern.Interface().(*ast.Ident).Name + if isWildcard(name) { + if old, ok := m[name]; ok { + return subst(nil, old, reflect.Value{}) + } + } + } + + if pos.IsValid() && pattern.Type() == positionType { + // use new position only if old position was valid in the first place + if old := pattern.Interface().(token.Pos); !old.IsValid() { + return pattern + } + return pos + } + + // Otherwise copy. + switch p := pattern; p.Kind() { + case reflect.Slice: + v := reflect.MakeSlice(p.Type(), p.Len(), p.Len()) + for i := 0; i < p.Len(); i++ { + v.Index(i).Set(subst(m, p.Index(i), pos)) + } + return v + + case reflect.Struct: + v := reflect.New(p.Type()).Elem() + for i := 0; i < p.NumField(); i++ { + v.Field(i).Set(subst(m, p.Field(i), pos)) + } + return v + + case reflect.Ptr: + v := reflect.New(p.Type()).Elem() + if elem := p.Elem(); elem.IsValid() { + v.Set(subst(m, elem, pos).Addr()) + } + return v + + case reflect.Interface: + v := reflect.New(p.Type()).Elem() + if elem := p.Elem(); elem.IsValid() { + v.Set(subst(m, elem, pos)) + } + return v + } + + return pattern +} diff --git a/vendor/github.com/klauspost/reedsolomon/LICENSE b/vendor/github.com/klauspost/reedsolomon/LICENSE new file mode 100644 index 0000000..a947e16 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/LICENSE @@ -0,0 +1,23 @@ +The MIT License (MIT) + +Copyright (c) 2015 Klaus Post +Copyright (c) 2015 Backblaze + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/vendor/github.com/klauspost/reedsolomon/README.md b/vendor/github.com/klauspost/reedsolomon/README.md new file mode 100644 index 0000000..aceff05 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/README.md @@ -0,0 +1,279 @@ +# Reed-Solomon +[![GoDoc][1]][2] [![Build Status][3]][4] + +[1]: https://godoc.org/github.com/klauspost/reedsolomon?status.svg +[2]: https://godoc.org/github.com/klauspost/reedsolomon +[3]: https://travis-ci.org/klauspost/reedsolomon.svg?branch=master +[4]: https://travis-ci.org/klauspost/reedsolomon + +Reed-Solomon Erasure Coding in Go, with speeds exceeding 1GB/s/cpu core implemented in pure Go. + +This is a Go port of the [JavaReedSolomon](https://github.com/Backblaze/JavaReedSolomon) library released by [Backblaze](http://backblaze.com), with some additional optimizations. + +For an introduction on erasure coding, see the post on the [Backblaze blog](https://www.backblaze.com/blog/reed-solomon/). + +Package home: https://github.com/klauspost/reedsolomon + +Godoc: https://godoc.org/github.com/klauspost/reedsolomon + +# Installation +To get the package use the standard: +```bash +go get -u github.com/klauspost/reedsolomon +``` + +# Changes + +## November 18, 2017 + +Added [WithAutoGoroutines](https://godoc.org/github.com/klauspost/reedsolomon#WithAutoGoroutines) which will attempt to calculate the optimal number of goroutines to use based on your expected shard size and detected CPU. + +## October 1, 2017 + +* [Cauchy Matrix](https://godoc.org/github.com/klauspost/reedsolomon#WithCauchyMatrix) is now an option. Thanks to [templexxx](https://github.com/templexxx) for the basis of this. +* Default maximum number of [goroutines](https://godoc.org/github.com/klauspost/reedsolomon#WithMaxGoroutines) has been increased for better multi-core scaling. +* After several requests the Reconstruct and ReconstructData now slices of zero length but sufficient capacity to be used instead of allocating new memory. + +## August 26, 2017 + +* The [`Encoder()`](https://godoc.org/github.com/klauspost/reedsolomon#Encoder) now contains an `Update` function contributed by [chenzhongtao](https://github.com/chenzhongtao). +* [Frank Wessels](https://github.com/fwessels) kindly contributed ARM 64 bit assembly, which gives a huge performance boost on this platform. + +## July 20, 2017 + +`ReconstructData` added to [`Encoder`](https://godoc.org/github.com/klauspost/reedsolomon#Encoder) interface. This can cause compatibility issues if you implement your own Encoder. A simple workaround can be added: +```Go +func (e *YourEnc) ReconstructData(shards [][]byte) error { + return ReconstructData(shards) +} +``` + +You can of course also do your own implementation. The [`StreamEncoder`](https://godoc.org/github.com/klauspost/reedsolomon#StreamEncoder) handles this without modifying the interface. This is a good lesson on why returning interfaces is not a good design. + +# Usage + +This section assumes you know the basics of Reed-Solomon encoding. A good start is this [Backblaze blog post](https://www.backblaze.com/blog/reed-solomon/). + +This package performs the calculation of the parity sets. The usage is therefore relatively simple. + +First of all, you need to choose your distribution of data and parity shards. A 'good' distribution is very subjective, and will depend a lot on your usage scenario. A good starting point is above 5 and below 257 data shards (the maximum supported number), and the number of parity shards to be 2 or above, and below the number of data shards. + +To create an encoder with 10 data shards (where your data goes) and 3 parity shards (calculated): +```Go + enc, err := reedsolomon.New(10, 3) +``` +This encoder will work for all parity sets with this distribution of data and parity shards. The error will only be set if you specify 0 or negative values in any of the parameters, or if you specify more than 256 data shards. + +The you send and receive data is a simple slice of byte slices; `[][]byte`. In the example above, the top slice must have a length of 13. +```Go + data := make([][]byte, 13) +``` +You should then fill the 10 first slices with *equally sized* data, and create parity shards that will be populated with parity data. In this case we create the data in memory, but you could for instance also use [mmap](https://github.com/edsrzf/mmap-go) to map files. + +```Go + // Create all shards, size them at 50000 each + for i := range input { + data[i] := make([]byte, 50000) + } + + + // Fill some data into the data shards + for i, in := range data[:10] { + for j:= range in { + in[j] = byte((i+j)&0xff) + } + } +``` + +To populate the parity shards, you simply call `Encode()` with your data. +```Go + err = enc.Encode(data) +``` +The only cases where you should get an error is, if the data shards aren't of equal size. The last 3 shards now contain parity data. You can verify this by calling `Verify()`: + +```Go + ok, err = enc.Verify(data) +``` + +The final (and important) part is to be able to reconstruct missing shards. For this to work, you need to know which parts of your data is missing. The encoder *does not know which parts are invalid*, so if data corruption is a likely scenario, you need to implement a hash check for each shard. If a byte has changed in your set, and you don't know which it is, there is no way to reconstruct the data set. + +To indicate missing data, you set the shard to nil before calling `Reconstruct()`: + +```Go + // Delete two data shards + data[3] = nil + data[7] = nil + + // Reconstruct the missing shards + err := enc.Reconstruct(data) +``` +The missing data and parity shards will be recreated. If more than 3 shards are missing, the reconstruction will fail. + +If you are only interested in the data shards (for reading purposes) you can call `ReconstructData()`: + +```Go + // Delete two data shards + data[3] = nil + data[7] = nil + + // Reconstruct just the missing data shards + err := enc.ReconstructData(data) +``` + +So to sum up reconstruction: +* The number of data/parity shards must match the numbers used for encoding. +* The order of shards must be the same as used when encoding. +* You may only supply data you know is valid. +* Invalid shards should be set to nil. + +For complete examples of an encoder and decoder see the [examples folder](https://github.com/klauspost/reedsolomon/tree/master/examples). + +# Splitting/Joining Data + +You might have a large slice of data. To help you split this, there are some helper functions that can split and join a single byte slice. + +```Go + bigfile, _ := ioutil.Readfile("myfile.data") + + // Split the file + split, err := enc.Split(bigfile) +``` +This will split the file into the number of data shards set when creating the encoder and create empty parity shards. + +An important thing to note is that you have to *keep track of the exact input size*. If the size of the input isn't divisible by the number of data shards, extra zeros will be inserted in the last shard. + +To join a data set, use the `Join()` function, which will join the shards and write it to the `io.Writer` you supply: +```Go + // Join a data set and write it to io.Discard. + err = enc.Join(io.Discard, data, len(bigfile)) +``` + +# Streaming/Merging + +It might seem like a limitation that all data should be in memory, but an important property is that *as long as the number of data/parity shards are the same, you can merge/split data sets*, and they will remain valid as a separate set. + +```Go + // Split the data set of 50000 elements into two of 25000 + splitA := make([][]byte, 13) + splitB := make([][]byte, 13) + + // Merge into a 100000 element set + merged := make([][]byte, 13) + + for i := range data { + splitA[i] = data[i][:25000] + splitB[i] = data[i][25000:] + + // Concatenate it to itself + merged[i] = append(make([]byte, 0, len(data[i])*2), data[i]...) + merged[i] = append(merged[i], data[i]...) + } + + // Each part should still verify as ok. + ok, err := enc.Verify(splitA) + if ok && err == nil { + log.Println("splitA ok") + } + + ok, err = enc.Verify(splitB) + if ok && err == nil { + log.Println("splitB ok") + } + + ok, err = enc.Verify(merge) + if ok && err == nil { + log.Println("merge ok") + } +``` + +This means that if you have a data set that may not fit into memory, you can split processing into smaller blocks. For the best throughput, don't use too small blocks. + +This also means that you can divide big input up into smaller blocks, and do reconstruction on parts of your data. This doesn't give the same flexibility of a higher number of data shards, but it will be much more performant. + +# Streaming API + +There has been added support for a streaming API, to help perform fully streaming operations, which enables you to do the same operations, but on streams. To use the stream API, use [`NewStream`](https://godoc.org/github.com/klauspost/reedsolomon#NewStream) function to create the encoding/decoding interfaces. You can use [`NewStreamC`](https://godoc.org/github.com/klauspost/reedsolomon#NewStreamC) to ready an interface that reads/writes concurrently from the streams. + +Input is delivered as `[]io.Reader`, output as `[]io.Writer`, and functionality corresponds to the in-memory API. Each stream must supply the same amount of data, similar to how each slice must be similar size with the in-memory API. +If an error occurs in relation to a stream, a [`StreamReadError`](https://godoc.org/github.com/klauspost/reedsolomon#StreamReadError) or [`StreamWriteError`](https://godoc.org/github.com/klauspost/reedsolomon#StreamWriteError) will help you determine which stream was the offender. + +There is no buffering or timeouts/retry specified. If you want to add that, you need to add it to the Reader/Writer. + +For complete examples of a streaming encoder and decoder see the [examples folder](https://github.com/klauspost/reedsolomon/tree/master/examples). + +# Advanced Options + +You can modify internal options which affects how jobs are split between and processed by goroutines. + +To create options, use the WithXXX functions. You can supply options to `New`, `NewStream` and `NewStreamC`. If no Options are supplied, default options are used. + +Example of how to supply options: + + ```Go + enc, err := reedsolomon.New(10, 3, WithMaxGoroutines(25)) + ``` + + +# Performance +Performance depends mainly on the number of parity shards. In rough terms, doubling the number of parity shards will double the encoding time. + +Here are the throughput numbers with some different selections of data and parity shards. For reference each shard is 1MB random data, and 2 CPU cores are used for encoding. + +| Data | Parity | Parity | MB/s | SSSE3 MB/s | SSSE3 Speed | Rel. Speed | +|------|--------|--------|--------|-------------|-------------|------------| +| 5 | 2 | 40% | 576,11 | 2599,2 | 451% | 100,00% | +| 10 | 2 | 20% | 587,73 | 3100,28 | 528% | 102,02% | +| 10 | 4 | 40% | 298,38 | 2470,97 | 828% | 51,79% | +| 50 | 20 | 40% | 59,81 | 713,28 | 1193% | 10,38% | + +If `runtime.GOMAXPROCS()` is set to a value higher than 1, the encoder will use multiple goroutines to perform the calculations in `Verify`, `Encode` and `Reconstruct`. + +Example of performance scaling on Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz - 4 physical cores, 8 logical cores. The example uses 10 blocks with 16MB data each and 4 parity blocks. + +| Threads | MB/s | Speed | +|---------|---------|-------| +| 1 | 1355,11 | 100% | +| 2 | 2339,78 | 172% | +| 4 | 3179,33 | 235% | +| 8 | 4346,18 | 321% | + +Benchmarking `Reconstruct()` followed by a `Verify()` (=`all`) versus just calling `ReconstructData()` (=`data`) gives the following result: +``` +benchmark all MB/s data MB/s speedup +BenchmarkReconstruct10x2x10000-8 2011.67 10530.10 5.23x +BenchmarkReconstruct50x5x50000-8 4585.41 14301.60 3.12x +BenchmarkReconstruct10x2x1M-8 8081.15 28216.41 3.49x +BenchmarkReconstruct5x2x1M-8 5780.07 28015.37 4.85x +BenchmarkReconstruct10x4x1M-8 4352.56 14367.61 3.30x +BenchmarkReconstruct50x20x1M-8 1364.35 4189.79 3.07x +BenchmarkReconstruct10x4x16M-8 1484.35 5779.53 3.89x +``` + +# Performance on ARM64 NEON + +By exploiting NEON instructions the performance for ARM has been accelerated. Below are the performance numbers for a single core on an ARM Cortex-A53 CPU @ 1.2GHz (Debian 8.0 Jessie running Go: 1.7.4): + +| Data | Parity | Parity | ARM64 Go MB/s | ARM64 NEON MB/s | NEON Speed | +|------|--------|--------|--------------:|----------------:|-----------:| +| 5 | 2 | 40% | 189 | 1304 | 588% | +| 10 | 2 | 20% | 188 | 1738 | 925% | +| 10 | 4 | 40% | 96 | 839 | 877% | + +# asm2plan9s + +[asm2plan9s](https://github.com/fwessels/asm2plan9s) is used for assembling the AVX2 instructions into their BYTE/WORD/LONG equivalents. + +# Links +* [Backblaze Open Sources Reed-Solomon Erasure Coding Source Code](https://www.backblaze.com/blog/reed-solomon/). +* [JavaReedSolomon](https://github.com/Backblaze/JavaReedSolomon). Compatible java library by Backblaze. +* [ocaml-reed-solomon-erasure](https://gitlab.com/darrenldl/ocaml-reed-solomon-erasure). Compatible OCaml implementation. +* [reedsolomon-c](https://github.com/jannson/reedsolomon-c). C version, compatible with output from this package. +* [Reed-Solomon Erasure Coding in Haskell](https://github.com/NicolasT/reedsolomon). Haskell port of the package with similar performance. +* [reed-solomon-erasure](https://github.com/darrenldl/reed-solomon-erasure). Compatible Rust implementation. +* [go-erasure](https://github.com/somethingnew2-0/go-erasure). A similar library using cgo, slower in my tests. +* [rsraid](https://github.com/goayame/rsraid). A similar library written in Go. Slower, but supports more shards. +* [Screaming Fast Galois Field Arithmetic](http://www.snia.org/sites/default/files2/SDC2013/presentations/NewThinking/EthanMiller_Screaming_Fast_Galois_Field%20Arithmetic_SIMD%20Instructions.pdf). Basis for SSE3 optimizations. + +# License + +This code, as the original [JavaReedSolomon](https://github.com/Backblaze/JavaReedSolomon) is published under an MIT license. See LICENSE file for more information. diff --git a/vendor/github.com/klauspost/reedsolomon/appveyor.yml b/vendor/github.com/klauspost/reedsolomon/appveyor.yml new file mode 100644 index 0000000..9bb067f --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/appveyor.yml @@ -0,0 +1,20 @@ +os: Visual Studio 2015 + +platform: x64 + +clone_folder: c:\gopath\src\github.com\klauspost\reedsolomon + +# environment variables +environment: + GOPATH: c:\gopath + +install: + - echo %PATH% + - echo %GOPATH% + - go version + - go env + - go get -d ./... + +build_script: + - go test -v -cpu=2 ./... + - go test -cpu=1,2,4 -short -race ./... diff --git a/vendor/github.com/klauspost/reedsolomon/galois.go b/vendor/github.com/klauspost/reedsolomon/galois.go new file mode 100644 index 0000000..2daf186 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/galois.go @@ -0,0 +1,902 @@ +/** + * 8-bit Galois Field + * Copyright 2015, Klaus Post + * Copyright 2015, Backblaze, Inc. All rights reserved. + */ + +package reedsolomon + +const ( + // The number of elements in the field. + fieldSize = 256 + + // The polynomial used to generate the logarithm table. + // + // There are a number of polynomials that work to generate + // a Galois field of 256 elements. The choice is arbitrary, + // and we just use the first one. + // + // The possibilities are: 29, 43, 45, 77, 95, 99, 101, 105, + //* 113, 135, 141, 169, 195, 207, 231, and 245. + generatingPolynomial = 29 +) + +var logTable = [fieldSize]byte{ + 0, 0, 1, 25, 2, 50, 26, 198, + 3, 223, 51, 238, 27, 104, 199, 75, + 4, 100, 224, 14, 52, 141, 239, 129, + 28, 193, 105, 248, 200, 8, 76, 113, + 5, 138, 101, 47, 225, 36, 15, 33, + 53, 147, 142, 218, 240, 18, 130, 69, + 29, 181, 194, 125, 106, 39, 249, 185, + 201, 154, 9, 120, 77, 228, 114, 166, + 6, 191, 139, 98, 102, 221, 48, 253, + 226, 152, 37, 179, 16, 145, 34, 136, + 54, 208, 148, 206, 143, 150, 219, 189, + 241, 210, 19, 92, 131, 56, 70, 64, + 30, 66, 182, 163, 195, 72, 126, 110, + 107, 58, 40, 84, 250, 133, 186, 61, + 202, 94, 155, 159, 10, 21, 121, 43, + 78, 212, 229, 172, 115, 243, 167, 87, + 7, 112, 192, 247, 140, 128, 99, 13, + 103, 74, 222, 237, 49, 197, 254, 24, + 227, 165, 153, 119, 38, 184, 180, 124, + 17, 68, 146, 217, 35, 32, 137, 46, + 55, 63, 209, 91, 149, 188, 207, 205, + 144, 135, 151, 178, 220, 252, 190, 97, + 242, 86, 211, 171, 20, 42, 93, 158, + 132, 60, 57, 83, 71, 109, 65, 162, + 31, 45, 67, 216, 183, 123, 164, 118, + 196, 23, 73, 236, 127, 12, 111, 246, + 108, 161, 59, 82, 41, 157, 85, 170, + 251, 96, 134, 177, 187, 204, 62, 90, + 203, 89, 95, 176, 156, 169, 160, 81, + 11, 245, 22, 235, 122, 117, 44, 215, + 79, 174, 213, 233, 230, 231, 173, 232, + 116, 214, 244, 234, 168, 80, 88, 175, +} + +/** + * Inverse of the logarithm table. Maps integer logarithms + * to members of the field. There is no entry for 255 + * because the highest log is 254. + * + * This table was generated by `go run gentables.go` + */ +var expTable = []byte{0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80, 0x1d, 0x3a, 0x74, 0xe8, 0xcd, 0x87, 0x13, 0x26, 0x4c, 0x98, 0x2d, 0x5a, 0xb4, 0x75, 0xea, 0xc9, 0x8f, 0x3, 0x6, 0xc, 0x18, 0x30, 0x60, 0xc0, 0x9d, 0x27, 0x4e, 0x9c, 0x25, 0x4a, 0x94, 0x35, 0x6a, 0xd4, 0xb5, 0x77, 0xee, 0xc1, 0x9f, 0x23, 0x46, 0x8c, 0x5, 0xa, 0x14, 0x28, 0x50, 0xa0, 0x5d, 0xba, 0x69, 0xd2, 0xb9, 0x6f, 0xde, 0xa1, 0x5f, 0xbe, 0x61, 0xc2, 0x99, 0x2f, 0x5e, 0xbc, 0x65, 0xca, 0x89, 0xf, 0x1e, 0x3c, 0x78, 0xf0, 0xfd, 0xe7, 0xd3, 0xbb, 0x6b, 0xd6, 0xb1, 0x7f, 0xfe, 0xe1, 0xdf, 0xa3, 0x5b, 0xb6, 0x71, 0xe2, 0xd9, 0xaf, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88, 0xd, 0x1a, 0x34, 0x68, 0xd0, 0xbd, 0x67, 0xce, 0x81, 0x1f, 0x3e, 0x7c, 0xf8, 0xed, 0xc7, 0x93, 0x3b, 0x76, 0xec, 0xc5, 0x97, 0x33, 0x66, 0xcc, 0x85, 0x17, 0x2e, 0x5c, 0xb8, 0x6d, 0xda, 0xa9, 0x4f, 0x9e, 0x21, 0x42, 0x84, 0x15, 0x2a, 0x54, 0xa8, 0x4d, 0x9a, 0x29, 0x52, 0xa4, 0x55, 0xaa, 0x49, 0x92, 0x39, 0x72, 0xe4, 0xd5, 0xb7, 0x73, 0xe6, 0xd1, 0xbf, 0x63, 0xc6, 0x91, 0x3f, 0x7e, 0xfc, 0xe5, 0xd7, 0xb3, 0x7b, 0xf6, 0xf1, 0xff, 0xe3, 0xdb, 0xab, 0x4b, 0x96, 0x31, 0x62, 0xc4, 0x95, 0x37, 0x6e, 0xdc, 0xa5, 0x57, 0xae, 0x41, 0x82, 0x19, 0x32, 0x64, 0xc8, 0x8d, 0x7, 0xe, 0x1c, 0x38, 0x70, 0xe0, 0xdd, 0xa7, 0x53, 0xa6, 0x51, 0xa2, 0x59, 0xb2, 0x79, 0xf2, 0xf9, 0xef, 0xc3, 0x9b, 0x2b, 0x56, 0xac, 0x45, 0x8a, 0x9, 0x12, 0x24, 0x48, 0x90, 0x3d, 0x7a, 0xf4, 0xf5, 0xf7, 0xf3, 0xfb, 0xeb, 0xcb, 0x8b, 0xb, 0x16, 0x2c, 0x58, 0xb0, 0x7d, 0xfa, 0xe9, 0xcf, 0x83, 0x1b, 0x36, 0x6c, 0xd8, 0xad, 0x47, 0x8e, 0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80, 0x1d, 0x3a, 0x74, 0xe8, 0xcd, 0x87, 0x13, 0x26, 0x4c, 0x98, 0x2d, 0x5a, 0xb4, 0x75, 0xea, 0xc9, 0x8f, 0x3, 0x6, 0xc, 0x18, 0x30, 0x60, 0xc0, 0x9d, 0x27, 0x4e, 0x9c, 0x25, 0x4a, 0x94, 0x35, 0x6a, 0xd4, 0xb5, 0x77, 0xee, 0xc1, 0x9f, 0x23, 0x46, 0x8c, 0x5, 0xa, 0x14, 0x28, 0x50, 0xa0, 0x5d, 0xba, 0x69, 0xd2, 0xb9, 0x6f, 0xde, 0xa1, 0x5f, 0xbe, 0x61, 0xc2, 0x99, 0x2f, 0x5e, 0xbc, 0x65, 0xca, 0x89, 0xf, 0x1e, 0x3c, 0x78, 0xf0, 0xfd, 0xe7, 0xd3, 0xbb, 0x6b, 0xd6, 0xb1, 0x7f, 0xfe, 0xe1, 0xdf, 0xa3, 0x5b, 0xb6, 0x71, 0xe2, 0xd9, 0xaf, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88, 0xd, 0x1a, 0x34, 0x68, 0xd0, 0xbd, 0x67, 0xce, 0x81, 0x1f, 0x3e, 0x7c, 0xf8, 0xed, 0xc7, 0x93, 0x3b, 0x76, 0xec, 0xc5, 0x97, 0x33, 0x66, 0xcc, 0x85, 0x17, 0x2e, 0x5c, 0xb8, 0x6d, 0xda, 0xa9, 0x4f, 0x9e, 0x21, 0x42, 0x84, 0x15, 0x2a, 0x54, 0xa8, 0x4d, 0x9a, 0x29, 0x52, 0xa4, 0x55, 0xaa, 0x49, 0x92, 0x39, 0x72, 0xe4, 0xd5, 0xb7, 0x73, 0xe6, 0xd1, 0xbf, 0x63, 0xc6, 0x91, 0x3f, 0x7e, 0xfc, 0xe5, 0xd7, 0xb3, 0x7b, 0xf6, 0xf1, 0xff, 0xe3, 0xdb, 0xab, 0x4b, 0x96, 0x31, 0x62, 0xc4, 0x95, 0x37, 0x6e, 0xdc, 0xa5, 0x57, 0xae, 0x41, 0x82, 0x19, 0x32, 0x64, 0xc8, 0x8d, 0x7, 0xe, 0x1c, 0x38, 0x70, 0xe0, 0xdd, 0xa7, 0x53, 0xa6, 0x51, 0xa2, 0x59, 0xb2, 0x79, 0xf2, 0xf9, 0xef, 0xc3, 0x9b, 0x2b, 0x56, 0xac, 0x45, 0x8a, 0x9, 0x12, 0x24, 0x48, 0x90, 0x3d, 0x7a, 0xf4, 0xf5, 0xf7, 0xf3, 0xfb, 0xeb, 0xcb, 0x8b, 0xb, 0x16, 0x2c, 0x58, 0xb0, 0x7d, 0xfa, 0xe9, 0xcf, 0x83, 0x1b, 0x36, 0x6c, 0xd8, 0xad, 0x47, 0x8e} + +func galAdd(a, b byte) byte { + return a ^ b +} + +func galSub(a, b byte) byte { + return a ^ b +} + +// Table from https://github.com/templexxx/reedsolomon +var invTable = [256]byte{0x0, 0x1, 0x8e, 0xf4, 0x47, 0xa7, 0x7a, 0xba, 0xad, 0x9d, 0xdd, 0x98, 0x3d, 0xaa, 0x5d, 0x96, 0xd8, 0x72, 0xc0, 0x58, 0xe0, 0x3e, 0x4c, 0x66, 0x90, 0xde, 0x55, 0x80, 0xa0, 0x83, 0x4b, 0x2a, 0x6c, 0xed, 0x39, 0x51, 0x60, 0x56, 0x2c, 0x8a, 0x70, 0xd0, 0x1f, 0x4a, 0x26, 0x8b, 0x33, 0x6e, 0x48, 0x89, 0x6f, 0x2e, 0xa4, 0xc3, 0x40, 0x5e, 0x50, 0x22, 0xcf, 0xa9, 0xab, 0xc, 0x15, 0xe1, 0x36, 0x5f, 0xf8, 0xd5, 0x92, 0x4e, 0xa6, 0x4, 0x30, 0x88, 0x2b, 0x1e, 0x16, 0x67, 0x45, 0x93, 0x38, 0x23, 0x68, 0x8c, 0x81, 0x1a, 0x25, 0x61, 0x13, 0xc1, 0xcb, 0x63, 0x97, 0xe, 0x37, 0x41, 0x24, 0x57, 0xca, 0x5b, 0xb9, 0xc4, 0x17, 0x4d, 0x52, 0x8d, 0xef, 0xb3, 0x20, 0xec, 0x2f, 0x32, 0x28, 0xd1, 0x11, 0xd9, 0xe9, 0xfb, 0xda, 0x79, 0xdb, 0x77, 0x6, 0xbb, 0x84, 0xcd, 0xfe, 0xfc, 0x1b, 0x54, 0xa1, 0x1d, 0x7c, 0xcc, 0xe4, 0xb0, 0x49, 0x31, 0x27, 0x2d, 0x53, 0x69, 0x2, 0xf5, 0x18, 0xdf, 0x44, 0x4f, 0x9b, 0xbc, 0xf, 0x5c, 0xb, 0xdc, 0xbd, 0x94, 0xac, 0x9, 0xc7, 0xa2, 0x1c, 0x82, 0x9f, 0xc6, 0x34, 0xc2, 0x46, 0x5, 0xce, 0x3b, 0xd, 0x3c, 0x9c, 0x8, 0xbe, 0xb7, 0x87, 0xe5, 0xee, 0x6b, 0xeb, 0xf2, 0xbf, 0xaf, 0xc5, 0x64, 0x7, 0x7b, 0x95, 0x9a, 0xae, 0xb6, 0x12, 0x59, 0xa5, 0x35, 0x65, 0xb8, 0xa3, 0x9e, 0xd2, 0xf7, 0x62, 0x5a, 0x85, 0x7d, 0xa8, 0x3a, 0x29, 0x71, 0xc8, 0xf6, 0xf9, 0x43, 0xd7, 0xd6, 0x10, 0x73, 0x76, 0x78, 0x99, 0xa, 0x19, 0x91, 0x14, 0x3f, 0xe6, 0xf0, 0x86, 0xb1, 0xe2, 0xf1, 0xfa, 0x74, 0xf3, 0xb4, 0x6d, 0x21, 0xb2, 0x6a, 0xe3, 0xe7, 0xb5, 0xea, 0x3, 0x8f, 0xd3, 0xc9, 0x42, 0xd4, 0xe8, 0x75, 0x7f, 0xff, 0x7e, 0xfd} + +var mulTable = [256][256]uint8{[256]uint8{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, + {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 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0xb5, 0xb7, 0xb1, 0xb3, 0xad, 0xaf, 0xa9, 0xab, 0xa5, 0xa7, 0xa1, 0xa3, 0xdd, 0xdf, 0xd9, 0xdb, 0xd5, 0xd7, 0xd1, 0xd3, 0xcd, 0xcf, 0xc9, 0xcb, 0xc5, 0xc7, 0xc1, 0xc3, 0xfd, 0xff, 0xf9, 0xfb, 0xf5, 0xf7, 0xf1, 0xf3, 0xed, 0xef, 0xe9, 0xeb, 0xe5, 0xe7, 0xe1, 0xe3}, + {0x0, 0x3, 0x6, 0x5, 0xc, 0xf, 0xa, 0x9, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11, 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21, 0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71, 0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41, 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1, 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1, 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1, 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 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0x68, 0x96, 0x56, 0xa8, 0xb7, 0x49, 0xc7, 0x39, 0x26, 0xd8, 0x18, 0xe6, 0xf9, 0x7, 0x64, 0x9a, 0x85, 0x7b, 0xbb, 0x45, 0x5a, 0xa4, 0x9c, 0x62, 0x7d, 0x83, 0x43, 0xbd, 0xa2, 0x5c, 0x3f, 0xc1, 0xde, 0x20, 0xe0, 0x1e, 0x1, 0xff, 0xe2, 0x1c, 0x3, 0xfd, 0x3d, 0xc3, 0xdc, 0x22, 0x41, 0xbf, 0xa0, 0x5e, 0x9e, 0x60, 0x7f, 0x81, 0xb9, 0x47, 0x58, 0xa6, 0x66, 0x98, 0x87, 0x79, 0x1a, 0xe4, 0xfb, 0x5, 0xc5, 0x3b, 0x24, 0xda, 0x54, 0xaa, 0xb5, 0x4b, 0x8b, 0x75, 0x6a, 0x94, 0xf7, 0x9, 0x16, 0xe8, 0x28, 0xd6, 0xc9, 0x37, 0xf, 0xf1, 0xee, 0x10, 0xd0, 0x2e, 0x31, 0xcf, 0xac, 0x52, 0x4d, 0xb3, 0x73, 0x8d, 0x92, 0x6c, 0x93, 0x6d, 0x72, 0x8c, 0x4c, 0xb2, 0xad, 0x53, 0x30, 0xce, 0xd1, 0x2f, 0xef, 0x11, 0xe, 0xf0, 0xc8, 0x36, 0x29, 0xd7, 0x17, 0xe9, 0xf6, 0x8, 0x6b, 0x95, 0x8a, 0x74, 0xb4, 0x4a, 0x55, 0xab, 0x25, 0xdb, 0xc4, 0x3a, 0xfa, 0x4, 0x1b, 0xe5, 0x86, 0x78, 0x67, 0x99, 0x59, 0xa7, 0xb8, 0x46, 0x7e, 0x80, 0x9f, 0x61, 0xa1, 0x5f, 0x40, 0xbe, 0xdd, 0x23, 0x3c, 0xc2, 0x2, 0xfc, 0xe3, 0x1d}, + {0x0, 0xff, 0xe3, 0x1c, 0xdb, 0x24, 0x38, 0xc7, 0xab, 0x54, 0x48, 0xb7, 0x70, 0x8f, 0x93, 0x6c, 0x4b, 0xb4, 0xa8, 0x57, 0x90, 0x6f, 0x73, 0x8c, 0xe0, 0x1f, 0x3, 0xfc, 0x3b, 0xc4, 0xd8, 0x27, 0x96, 0x69, 0x75, 0x8a, 0x4d, 0xb2, 0xae, 0x51, 0x3d, 0xc2, 0xde, 0x21, 0xe6, 0x19, 0x5, 0xfa, 0xdd, 0x22, 0x3e, 0xc1, 0x6, 0xf9, 0xe5, 0x1a, 0x76, 0x89, 0x95, 0x6a, 0xad, 0x52, 0x4e, 0xb1, 0x31, 0xce, 0xd2, 0x2d, 0xea, 0x15, 0x9, 0xf6, 0x9a, 0x65, 0x79, 0x86, 0x41, 0xbe, 0xa2, 0x5d, 0x7a, 0x85, 0x99, 0x66, 0xa1, 0x5e, 0x42, 0xbd, 0xd1, 0x2e, 0x32, 0xcd, 0xa, 0xf5, 0xe9, 0x16, 0xa7, 0x58, 0x44, 0xbb, 0x7c, 0x83, 0x9f, 0x60, 0xc, 0xf3, 0xef, 0x10, 0xd7, 0x28, 0x34, 0xcb, 0xec, 0x13, 0xf, 0xf0, 0x37, 0xc8, 0xd4, 0x2b, 0x47, 0xb8, 0xa4, 0x5b, 0x9c, 0x63, 0x7f, 0x80, 0x62, 0x9d, 0x81, 0x7e, 0xb9, 0x46, 0x5a, 0xa5, 0xc9, 0x36, 0x2a, 0xd5, 0x12, 0xed, 0xf1, 0xe, 0x29, 0xd6, 0xca, 0x35, 0xf2, 0xd, 0x11, 0xee, 0x82, 0x7d, 0x61, 0x9e, 0x59, 0xa6, 0xba, 0x45, 0xf4, 0xb, 0x17, 0xe8, 0x2f, 0xd0, 0xcc, 0x33, 0x5f, 0xa0, 0xbc, 0x43, 0x84, 0x7b, 0x67, 0x98, 0xbf, 0x40, 0x5c, 0xa3, 0x64, 0x9b, 0x87, 0x78, 0x14, 0xeb, 0xf7, 0x8, 0xcf, 0x30, 0x2c, 0xd3, 0x53, 0xac, 0xb0, 0x4f, 0x88, 0x77, 0x6b, 0x94, 0xf8, 0x7, 0x1b, 0xe4, 0x23, 0xdc, 0xc0, 0x3f, 0x18, 0xe7, 0xfb, 0x4, 0xc3, 0x3c, 0x20, 0xdf, 0xb3, 0x4c, 0x50, 0xaf, 0x68, 0x97, 0x8b, 0x74, 0xc5, 0x3a, 0x26, 0xd9, 0x1e, 0xe1, 0xfd, 0x2, 0x6e, 0x91, 0x8d, 0x72, 0xb5, 0x4a, 0x56, 0xa9, 0x8e, 0x71, 0x6d, 0x92, 0x55, 0xaa, 0xb6, 0x49, 0x25, 0xda, 0xc6, 0x39, 0xfe, 0x1, 0x1d, 0xe2}} + +var mulTableLow = [256][16]uint8{{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, + {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf}, + {0x0, 0x2, 0x4, 0x6, 0x8, 0xa, 0xc, 0xe, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e}, + {0x0, 0x3, 0x6, 0x5, 0xc, 0xf, 0xa, 0x9, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11}, + {0x0, 0x4, 0x8, 0xc, 0x10, 0x14, 0x18, 0x1c, 0x20, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 0x3c}, + {0x0, 0x5, 0xa, 0xf, 0x14, 0x11, 0x1e, 0x1b, 0x28, 0x2d, 0x22, 0x27, 0x3c, 0x39, 0x36, 0x33}, + {0x0, 0x6, 0xc, 0xa, 0x18, 0x1e, 0x14, 0x12, 0x30, 0x36, 0x3c, 0x3a, 0x28, 0x2e, 0x24, 0x22}, + {0x0, 0x7, 0xe, 0x9, 0x1c, 0x1b, 0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d}, + {0x0, 0x8, 0x10, 0x18, 0x20, 0x28, 0x30, 0x38, 0x40, 0x48, 0x50, 0x58, 0x60, 0x68, 0x70, 0x78}, + {0x0, 0x9, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65, 0x7e, 0x77}, + {0x0, 0xa, 0x14, 0x1e, 0x28, 0x22, 0x3c, 0x36, 0x50, 0x5a, 0x44, 0x4e, 0x78, 0x72, 0x6c, 0x66}, + {0x0, 0xb, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31, 0x58, 0x53, 0x4e, 0x45, 0x74, 0x7f, 0x62, 0x69}, + {0x0, 0xc, 0x18, 0x14, 0x30, 0x3c, 0x28, 0x24, 0x60, 0x6c, 0x78, 0x74, 0x50, 0x5c, 0x48, 0x44}, + {0x0, 0xd, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23, 0x68, 0x65, 0x72, 0x7f, 0x5c, 0x51, 0x46, 0x4b}, + {0x0, 0xe, 0x1c, 0x12, 0x38, 0x36, 0x24, 0x2a, 0x70, 0x7e, 0x6c, 0x62, 0x48, 0x46, 0x54, 0x5a}, + {0x0, 0xf, 0x1e, 0x11, 0x3c, 0x33, 0x22, 0x2d, 0x78, 0x77, 0x66, 0x69, 0x44, 0x4b, 0x5a, 0x55}, + {0x0, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70, 0x80, 0x90, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0}, + {0x0, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}, + {0x0, 0x12, 0x24, 0x36, 0x48, 0x5a, 0x6c, 0x7e, 0x90, 0x82, 0xb4, 0xa6, 0xd8, 0xca, 0xfc, 0xee}, + {0x0, 0x13, 0x26, 0x35, 0x4c, 0x5f, 0x6a, 0x79, 0x98, 0x8b, 0xbe, 0xad, 0xd4, 0xc7, 0xf2, 0xe1}, + {0x0, 0x14, 0x28, 0x3c, 0x50, 0x44, 0x78, 0x6c, 0xa0, 0xb4, 0x88, 0x9c, 0xf0, 0xe4, 0xd8, 0xcc}, + {0x0, 0x15, 0x2a, 0x3f, 0x54, 0x41, 0x7e, 0x6b, 0xa8, 0xbd, 0x82, 0x97, 0xfc, 0xe9, 0xd6, 0xc3}, + {0x0, 0x16, 0x2c, 0x3a, 0x58, 0x4e, 0x74, 0x62, 0xb0, 0xa6, 0x9c, 0x8a, 0xe8, 0xfe, 0xc4, 0xd2}, + {0x0, 0x17, 0x2e, 0x39, 0x5c, 0x4b, 0x72, 0x65, 0xb8, 0xaf, 0x96, 0x81, 0xe4, 0xf3, 0xca, 0xdd}, + {0x0, 0x18, 0x30, 0x28, 0x60, 0x78, 0x50, 0x48, 0xc0, 0xd8, 0xf0, 0xe8, 0xa0, 0xb8, 0x90, 0x88}, + {0x0, 0x19, 0x32, 0x2b, 0x64, 0x7d, 0x56, 0x4f, 0xc8, 0xd1, 0xfa, 0xe3, 0xac, 0xb5, 0x9e, 0x87}, + {0x0, 0x1a, 0x34, 0x2e, 0x68, 0x72, 0x5c, 0x46, 0xd0, 0xca, 0xe4, 0xfe, 0xb8, 0xa2, 0x8c, 0x96}, + {0x0, 0x1b, 0x36, 0x2d, 0x6c, 0x77, 0x5a, 0x41, 0xd8, 0xc3, 0xee, 0xf5, 0xb4, 0xaf, 0x82, 0x99}, + {0x0, 0x1c, 0x38, 0x24, 0x70, 0x6c, 0x48, 0x54, 0xe0, 0xfc, 0xd8, 0xc4, 0x90, 0x8c, 0xa8, 0xb4}, + {0x0, 0x1d, 0x3a, 0x27, 0x74, 0x69, 0x4e, 0x53, 0xe8, 0xf5, 0xd2, 0xcf, 0x9c, 0x81, 0xa6, 0xbb}, + {0x0, 0x1e, 0x3c, 0x22, 0x78, 0x66, 0x44, 0x5a, 0xf0, 0xee, 0xcc, 0xd2, 0x88, 0x96, 0xb4, 0xaa}, + {0x0, 0x1f, 0x3e, 0x21, 0x7c, 0x63, 0x42, 0x5d, 0xf8, 0xe7, 0xc6, 0xd9, 0x84, 0x9b, 0xba, 0xa5}, + {0x0, 0x20, 0x40, 0x60, 0x80, 0xa0, 0xc0, 0xe0, 0x1d, 0x3d, 0x5d, 0x7d, 0x9d, 0xbd, 0xdd, 0xfd}, + {0x0, 0x21, 0x42, 0x63, 0x84, 0xa5, 0xc6, 0xe7, 0x15, 0x34, 0x57, 0x76, 0x91, 0xb0, 0xd3, 0xf2}, + {0x0, 0x22, 0x44, 0x66, 0x88, 0xaa, 0xcc, 0xee, 0xd, 0x2f, 0x49, 0x6b, 0x85, 0xa7, 0xc1, 0xe3}, + {0x0, 0x23, 0x46, 0x65, 0x8c, 0xaf, 0xca, 0xe9, 0x5, 0x26, 0x43, 0x60, 0x89, 0xaa, 0xcf, 0xec}, + {0x0, 0x24, 0x48, 0x6c, 0x90, 0xb4, 0xd8, 0xfc, 0x3d, 0x19, 0x75, 0x51, 0xad, 0x89, 0xe5, 0xc1}, + {0x0, 0x25, 0x4a, 0x6f, 0x94, 0xb1, 0xde, 0xfb, 0x35, 0x10, 0x7f, 0x5a, 0xa1, 0x84, 0xeb, 0xce}, + {0x0, 0x26, 0x4c, 0x6a, 0x98, 0xbe, 0xd4, 0xf2, 0x2d, 0xb, 0x61, 0x47, 0xb5, 0x93, 0xf9, 0xdf}, + {0x0, 0x27, 0x4e, 0x69, 0x9c, 0xbb, 0xd2, 0xf5, 0x25, 0x2, 0x6b, 0x4c, 0xb9, 0x9e, 0xf7, 0xd0}, + {0x0, 0x28, 0x50, 0x78, 0xa0, 0x88, 0xf0, 0xd8, 0x5d, 0x75, 0xd, 0x25, 0xfd, 0xd5, 0xad, 0x85}, + {0x0, 0x29, 0x52, 0x7b, 0xa4, 0x8d, 0xf6, 0xdf, 0x55, 0x7c, 0x7, 0x2e, 0xf1, 0xd8, 0xa3, 0x8a}, + {0x0, 0x2a, 0x54, 0x7e, 0xa8, 0x82, 0xfc, 0xd6, 0x4d, 0x67, 0x19, 0x33, 0xe5, 0xcf, 0xb1, 0x9b}, + {0x0, 0x2b, 0x56, 0x7d, 0xac, 0x87, 0xfa, 0xd1, 0x45, 0x6e, 0x13, 0x38, 0xe9, 0xc2, 0xbf, 0x94}, + {0x0, 0x2c, 0x58, 0x74, 0xb0, 0x9c, 0xe8, 0xc4, 0x7d, 0x51, 0x25, 0x9, 0xcd, 0xe1, 0x95, 0xb9}, + {0x0, 0x2d, 0x5a, 0x77, 0xb4, 0x99, 0xee, 0xc3, 0x75, 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+ {0x0, 0xf9, 0xef, 0x16, 0xc3, 0x3a, 0x2c, 0xd5, 0x9b, 0x62, 0x74, 0x8d, 0x58, 0xa1, 0xb7, 0x4e}, + {0x0, 0xfa, 0xe9, 0x13, 0xcf, 0x35, 0x26, 0xdc, 0x83, 0x79, 0x6a, 0x90, 0x4c, 0xb6, 0xa5, 0x5f}, + {0x0, 0xfb, 0xeb, 0x10, 0xcb, 0x30, 0x20, 0xdb, 0x8b, 0x70, 0x60, 0x9b, 0x40, 0xbb, 0xab, 0x50}, + {0x0, 0xfc, 0xe5, 0x19, 0xd7, 0x2b, 0x32, 0xce, 0xb3, 0x4f, 0x56, 0xaa, 0x64, 0x98, 0x81, 0x7d}, + {0x0, 0xfd, 0xe7, 0x1a, 0xd3, 0x2e, 0x34, 0xc9, 0xbb, 0x46, 0x5c, 0xa1, 0x68, 0x95, 0x8f, 0x72}, + {0x0, 0xfe, 0xe1, 0x1f, 0xdf, 0x21, 0x3e, 0xc0, 0xa3, 0x5d, 0x42, 0xbc, 0x7c, 0x82, 0x9d, 0x63}, + {0x0, 0xff, 0xe3, 0x1c, 0xdb, 0x24, 0x38, 0xc7, 0xab, 0x54, 0x48, 0xb7, 0x70, 0x8f, 0x93, 0x6c}} +var mulTableHigh = [256][16]uint8{{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, + {0x0, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70, 0x80, 0x90, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0}, + {0x0, 0x20, 0x40, 0x60, 0x80, 0xa0, 0xc0, 0xe0, 0x1d, 0x3d, 0x5d, 0x7d, 0x9d, 0xbd, 0xdd, 0xfd}, + {0x0, 0x30, 0x60, 0x50, 0xc0, 0xf0, 0xa0, 0x90, 0x9d, 0xad, 0xfd, 0xcd, 0x5d, 0x6d, 0x3d, 0xd}, + {0x0, 0x40, 0x80, 0xc0, 0x1d, 0x5d, 0x9d, 0xdd, 0x3a, 0x7a, 0xba, 0xfa, 0x27, 0x67, 0xa7, 0xe7}, + {0x0, 0x50, 0xa0, 0xf0, 0x5d, 0xd, 0xfd, 0xad, 0xba, 0xea, 0x1a, 0x4a, 0xe7, 0xb7, 0x47, 0x17}, + {0x0, 0x60, 0xc0, 0xa0, 0x9d, 0xfd, 0x5d, 0x3d, 0x27, 0x47, 0xe7, 0x87, 0xba, 0xda, 0x7a, 0x1a}, + {0x0, 0x70, 0xe0, 0x90, 0xdd, 0xad, 0x3d, 0x4d, 0xa7, 0xd7, 0x47, 0x37, 0x7a, 0xa, 0x9a, 0xea}, + {0x0, 0x80, 0x1d, 0x9d, 0x3a, 0xba, 0x27, 0xa7, 0x74, 0xf4, 0x69, 0xe9, 0x4e, 0xce, 0x53, 0xd3}, + {0x0, 0x90, 0x3d, 0xad, 0x7a, 0xea, 0x47, 0xd7, 0xf4, 0x64, 0xc9, 0x59, 0x8e, 0x1e, 0xb3, 0x23}, + {0x0, 0xa0, 0x5d, 0xfd, 0xba, 0x1a, 0xe7, 0x47, 0x69, 0xc9, 0x34, 0x94, 0xd3, 0x73, 0x8e, 0x2e}, + {0x0, 0xb0, 0x7d, 0xcd, 0xfa, 0x4a, 0x87, 0x37, 0xe9, 0x59, 0x94, 0x24, 0x13, 0xa3, 0x6e, 0xde}, + {0x0, 0xc0, 0x9d, 0x5d, 0x27, 0xe7, 0xba, 0x7a, 0x4e, 0x8e, 0xd3, 0x13, 0x69, 0xa9, 0xf4, 0x34}, + {0x0, 0xd0, 0xbd, 0x6d, 0x67, 0xb7, 0xda, 0xa, 0xce, 0x1e, 0x73, 0xa3, 0xa9, 0x79, 0x14, 0xc4}, + {0x0, 0xe0, 0xdd, 0x3d, 0xa7, 0x47, 0x7a, 0x9a, 0x53, 0xb3, 0x8e, 0x6e, 0xf4, 0x14, 0x29, 0xc9}, + {0x0, 0xf0, 0xfd, 0xd, 0xe7, 0x17, 0x1a, 0xea, 0xd3, 0x23, 0x2e, 0xde, 0x34, 0xc4, 0xc9, 0x39}, + {0x0, 0x1d, 0x3a, 0x27, 0x74, 0x69, 0x4e, 0x53, 0xe8, 0xf5, 0xd2, 0xcf, 0x9c, 0x81, 0xa6, 0xbb}, + {0x0, 0xd, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23, 0x68, 0x65, 0x72, 0x7f, 0x5c, 0x51, 0x46, 0x4b}, + {0x0, 0x3d, 0x7a, 0x47, 0xf4, 0xc9, 0x8e, 0xb3, 0xf5, 0xc8, 0x8f, 0xb2, 0x1, 0x3c, 0x7b, 0x46}, + {0x0, 0x2d, 0x5a, 0x77, 0xb4, 0x99, 0xee, 0xc3, 0x75, 0x58, 0x2f, 0x2, 0xc1, 0xec, 0x9b, 0xb6}, + {0x0, 0x5d, 0xba, 0xe7, 0x69, 0x34, 0xd3, 0x8e, 0xd2, 0x8f, 0x68, 0x35, 0xbb, 0xe6, 0x1, 0x5c}, + {0x0, 0x4d, 0x9a, 0xd7, 0x29, 0x64, 0xb3, 0xfe, 0x52, 0x1f, 0xc8, 0x85, 0x7b, 0x36, 0xe1, 0xac}, + {0x0, 0x7d, 0xfa, 0x87, 0xe9, 0x94, 0x13, 0x6e, 0xcf, 0xb2, 0x35, 0x48, 0x26, 0x5b, 0xdc, 0xa1}, + {0x0, 0x6d, 0xda, 0xb7, 0xa9, 0xc4, 0x73, 0x1e, 0x4f, 0x22, 0x95, 0xf8, 0xe6, 0x8b, 0x3c, 0x51}, + {0x0, 0x9d, 0x27, 0xba, 0x4e, 0xd3, 0x69, 0xf4, 0x9c, 0x1, 0xbb, 0x26, 0xd2, 0x4f, 0xf5, 0x68}, + {0x0, 0x8d, 0x7, 0x8a, 0xe, 0x83, 0x9, 0x84, 0x1c, 0x91, 0x1b, 0x96, 0x12, 0x9f, 0x15, 0x98}, + {0x0, 0xbd, 0x67, 0xda, 0xce, 0x73, 0xa9, 0x14, 0x81, 0x3c, 0xe6, 0x5b, 0x4f, 0xf2, 0x28, 0x95}, + {0x0, 0xad, 0x47, 0xea, 0x8e, 0x23, 0xc9, 0x64, 0x1, 0xac, 0x46, 0xeb, 0x8f, 0x22, 0xc8, 0x65}, + {0x0, 0xdd, 0xa7, 0x7a, 0x53, 0x8e, 0xf4, 0x29, 0xa6, 0x7b, 0x1, 0xdc, 0xf5, 0x28, 0x52, 0x8f}, + {0x0, 0xcd, 0x87, 0x4a, 0x13, 0xde, 0x94, 0x59, 0x26, 0xeb, 0xa1, 0x6c, 0x35, 0xf8, 0xb2, 0x7f}, + {0x0, 0xfd, 0xe7, 0x1a, 0xd3, 0x2e, 0x34, 0xc9, 0xbb, 0x46, 0x5c, 0xa1, 0x68, 0x95, 0x8f, 0x72}, + {0x0, 0xed, 0xc7, 0x2a, 0x93, 0x7e, 0x54, 0xb9, 0x3b, 0xd6, 0xfc, 0x11, 0xa8, 0x45, 0x6f, 0x82}, + {0x0, 0x3a, 0x74, 0x4e, 0xe8, 0xd2, 0x9c, 0xa6, 0xcd, 0xf7, 0xb9, 0x83, 0x25, 0x1f, 0x51, 0x6b}, + {0x0, 0x2a, 0x54, 0x7e, 0xa8, 0x82, 0xfc, 0xd6, 0x4d, 0x67, 0x19, 0x33, 0xe5, 0xcf, 0xb1, 0x9b}, + {0x0, 0x1a, 0x34, 0x2e, 0x68, 0x72, 0x5c, 0x46, 0xd0, 0xca, 0xe4, 0xfe, 0xb8, 0xa2, 0x8c, 0x96}, + {0x0, 0xa, 0x14, 0x1e, 0x28, 0x22, 0x3c, 0x36, 0x50, 0x5a, 0x44, 0x4e, 0x78, 0x72, 0x6c, 0x66}, + {0x0, 0x7a, 0xf4, 0x8e, 0xf5, 0x8f, 0x1, 0x7b, 0xf7, 0x8d, 0x3, 0x79, 0x2, 0x78, 0xf6, 0x8c}, + {0x0, 0x6a, 0xd4, 0xbe, 0xb5, 0xdf, 0x61, 0xb, 0x77, 0x1d, 0xa3, 0xc9, 0xc2, 0xa8, 0x16, 0x7c}, + {0x0, 0x5a, 0xb4, 0xee, 0x75, 0x2f, 0xc1, 0x9b, 0xea, 0xb0, 0x5e, 0x4, 0x9f, 0xc5, 0x2b, 0x71}, + {0x0, 0x4a, 0x94, 0xde, 0x35, 0x7f, 0xa1, 0xeb, 0x6a, 0x20, 0xfe, 0xb4, 0x5f, 0x15, 0xcb, 0x81}, + {0x0, 0xba, 0x69, 0xd3, 0xd2, 0x68, 0xbb, 0x1, 0xb9, 0x3, 0xd0, 0x6a, 0x6b, 0xd1, 0x2, 0xb8}, + {0x0, 0xaa, 0x49, 0xe3, 0x92, 0x38, 0xdb, 0x71, 0x39, 0x93, 0x70, 0xda, 0xab, 0x1, 0xe2, 0x48}, + {0x0, 0x9a, 0x29, 0xb3, 0x52, 0xc8, 0x7b, 0xe1, 0xa4, 0x3e, 0x8d, 0x17, 0xf6, 0x6c, 0xdf, 0x45}, + {0x0, 0x8a, 0x9, 0x83, 0x12, 0x98, 0x1b, 0x91, 0x24, 0xae, 0x2d, 0xa7, 0x36, 0xbc, 0x3f, 0xb5}, + {0x0, 0xfa, 0xe9, 0x13, 0xcf, 0x35, 0x26, 0xdc, 0x83, 0x79, 0x6a, 0x90, 0x4c, 0xb6, 0xa5, 0x5f}, + {0x0, 0xea, 0xc9, 0x23, 0x8f, 0x65, 0x46, 0xac, 0x3, 0xe9, 0xca, 0x20, 0x8c, 0x66, 0x45, 0xaf}, + {0x0, 0xda, 0xa9, 0x73, 0x4f, 0x95, 0xe6, 0x3c, 0x9e, 0x44, 0x37, 0xed, 0xd1, 0xb, 0x78, 0xa2}, + {0x0, 0xca, 0x89, 0x43, 0xf, 0xc5, 0x86, 0x4c, 0x1e, 0xd4, 0x97, 0x5d, 0x11, 0xdb, 0x98, 0x52}, + {0x0, 0x27, 0x4e, 0x69, 0x9c, 0xbb, 0xd2, 0xf5, 0x25, 0x2, 0x6b, 0x4c, 0xb9, 0x9e, 0xf7, 0xd0}, + {0x0, 0x37, 0x6e, 0x59, 0xdc, 0xeb, 0xb2, 0x85, 0xa5, 0x92, 0xcb, 0xfc, 0x79, 0x4e, 0x17, 0x20}, + {0x0, 0x7, 0xe, 0x9, 0x1c, 0x1b, 0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d}, + {0x0, 0x17, 0x2e, 0x39, 0x5c, 0x4b, 0x72, 0x65, 0xb8, 0xaf, 0x96, 0x81, 0xe4, 0xf3, 0xca, 0xdd}, + {0x0, 0x67, 0xce, 0xa9, 0x81, 0xe6, 0x4f, 0x28, 0x1f, 0x78, 0xd1, 0xb6, 0x9e, 0xf9, 0x50, 0x37}, + {0x0, 0x77, 0xee, 0x99, 0xc1, 0xb6, 0x2f, 0x58, 0x9f, 0xe8, 0x71, 0x6, 0x5e, 0x29, 0xb0, 0xc7}, + {0x0, 0x47, 0x8e, 0xc9, 0x1, 0x46, 0x8f, 0xc8, 0x2, 0x45, 0x8c, 0xcb, 0x3, 0x44, 0x8d, 0xca}, + {0x0, 0x57, 0xae, 0xf9, 0x41, 0x16, 0xef, 0xb8, 0x82, 0xd5, 0x2c, 0x7b, 0xc3, 0x94, 0x6d, 0x3a}, + {0x0, 0xa7, 0x53, 0xf4, 0xa6, 0x1, 0xf5, 0x52, 0x51, 0xf6, 0x2, 0xa5, 0xf7, 0x50, 0xa4, 0x3}, + {0x0, 0xb7, 0x73, 0xc4, 0xe6, 0x51, 0x95, 0x22, 0xd1, 0x66, 0xa2, 0x15, 0x37, 0x80, 0x44, 0xf3}, + {0x0, 0x87, 0x13, 0x94, 0x26, 0xa1, 0x35, 0xb2, 0x4c, 0xcb, 0x5f, 0xd8, 0x6a, 0xed, 0x79, 0xfe}, + {0x0, 0x97, 0x33, 0xa4, 0x66, 0xf1, 0x55, 0xc2, 0xcc, 0x5b, 0xff, 0x68, 0xaa, 0x3d, 0x99, 0xe}, + {0x0, 0xe7, 0xd3, 0x34, 0xbb, 0x5c, 0x68, 0x8f, 0x6b, 0x8c, 0xb8, 0x5f, 0xd0, 0x37, 0x3, 0xe4}, + {0x0, 0xf7, 0xf3, 0x4, 0xfb, 0xc, 0x8, 0xff, 0xeb, 0x1c, 0x18, 0xef, 0x10, 0xe7, 0xe3, 0x14}, + {0x0, 0xc7, 0x93, 0x54, 0x3b, 0xfc, 0xa8, 0x6f, 0x76, 0xb1, 0xe5, 0x22, 0x4d, 0x8a, 0xde, 0x19}, + {0x0, 0xd7, 0xb3, 0x64, 0x7b, 0xac, 0xc8, 0x1f, 0xf6, 0x21, 0x45, 0x92, 0x8d, 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0xc1, 0xe3}, + {0x0, 0xcf, 0x83, 0x4c, 0x1b, 0xd4, 0x98, 0x57, 0x36, 0xf9, 0xb5, 0x7a, 0x2d, 0xe2, 0xae, 0x61}, + {0x0, 0xdf, 0xa3, 0x7c, 0x5b, 0x84, 0xf8, 0x27, 0xb6, 0x69, 0x15, 0xca, 0xed, 0x32, 0x4e, 0x91}, + {0x0, 0xef, 0xc3, 0x2c, 0x9b, 0x74, 0x58, 0xb7, 0x2b, 0xc4, 0xe8, 0x7, 0xb0, 0x5f, 0x73, 0x9c}, + {0x0, 0xff, 0xe3, 0x1c, 0xdb, 0x24, 0x38, 0xc7, 0xab, 0x54, 0x48, 0xb7, 0x70, 0x8f, 0x93, 0x6c}, + {0x0, 0x8f, 0x3, 0x8c, 0x6, 0x89, 0x5, 0x8a, 0xc, 0x83, 0xf, 0x80, 0xa, 0x85, 0x9, 0x86}, + {0x0, 0x9f, 0x23, 0xbc, 0x46, 0xd9, 0x65, 0xfa, 0x8c, 0x13, 0xaf, 0x30, 0xca, 0x55, 0xe9, 0x76}, + {0x0, 0xaf, 0x43, 0xec, 0x86, 0x29, 0xc5, 0x6a, 0x11, 0xbe, 0x52, 0xfd, 0x97, 0x38, 0xd4, 0x7b}, + {0x0, 0xbf, 0x63, 0xdc, 0xc6, 0x79, 0xa5, 0x1a, 0x91, 0x2e, 0xf2, 0x4d, 0x57, 0xe8, 0x34, 0x8b}, + {0x0, 0x4f, 0x9e, 0xd1, 0x21, 0x6e, 0xbf, 0xf0, 0x42, 0xd, 0xdc, 0x93, 0x63, 0x2c, 0xfd, 0xb2}, + {0x0, 0x5f, 0xbe, 0xe1, 0x61, 0x3e, 0xdf, 0x80, 0xc2, 0x9d, 0x7c, 0x23, 0xa3, 0xfc, 0x1d, 0x42}, + {0x0, 0x6f, 0xde, 0xb1, 0xa1, 0xce, 0x7f, 0x10, 0x5f, 0x30, 0x81, 0xee, 0xfe, 0x91, 0x20, 0x4f}, + {0x0, 0x7f, 0xfe, 0x81, 0xe1, 0x9e, 0x1f, 0x60, 0xdf, 0xa0, 0x21, 0x5e, 0x3e, 0x41, 0xc0, 0xbf}, + {0x0, 0xf, 0x1e, 0x11, 0x3c, 0x33, 0x22, 0x2d, 0x78, 0x77, 0x66, 0x69, 0x44, 0x4b, 0x5a, 0x55}, + {0x0, 0x1f, 0x3e, 0x21, 0x7c, 0x63, 0x42, 0x5d, 0xf8, 0xe7, 0xc6, 0xd9, 0x84, 0x9b, 0xba, 0xa5}, + {0x0, 0x2f, 0x5e, 0x71, 0xbc, 0x93, 0xe2, 0xcd, 0x65, 0x4a, 0x3b, 0x14, 0xd9, 0xf6, 0x87, 0xa8}, + {0x0, 0x3f, 0x7e, 0x41, 0xfc, 0xc3, 0x82, 0xbd, 0xe5, 0xda, 0x9b, 0xa4, 0x19, 0x26, 0x67, 0x58}, + {0x0, 0x9c, 0x25, 0xb9, 0x4a, 0xd6, 0x6f, 0xf3, 0x94, 0x8, 0xb1, 0x2d, 0xde, 0x42, 0xfb, 0x67}, + {0x0, 0x8c, 0x5, 0x89, 0xa, 0x86, 0xf, 0x83, 0x14, 0x98, 0x11, 0x9d, 0x1e, 0x92, 0x1b, 0x97}, + {0x0, 0xbc, 0x65, 0xd9, 0xca, 0x76, 0xaf, 0x13, 0x89, 0x35, 0xec, 0x50, 0x43, 0xff, 0x26, 0x9a}, + {0x0, 0xac, 0x45, 0xe9, 0x8a, 0x26, 0xcf, 0x63, 0x9, 0xa5, 0x4c, 0xe0, 0x83, 0x2f, 0xc6, 0x6a}, + {0x0, 0xdc, 0xa5, 0x79, 0x57, 0x8b, 0xf2, 0x2e, 0xae, 0x72, 0xb, 0xd7, 0xf9, 0x25, 0x5c, 0x80}, + {0x0, 0xcc, 0x85, 0x49, 0x17, 0xdb, 0x92, 0x5e, 0x2e, 0xe2, 0xab, 0x67, 0x39, 0xf5, 0xbc, 0x70}, + {0x0, 0xfc, 0xe5, 0x19, 0xd7, 0x2b, 0x32, 0xce, 0xb3, 0x4f, 0x56, 0xaa, 0x64, 0x98, 0x81, 0x7d}, + {0x0, 0xec, 0xc5, 0x29, 0x97, 0x7b, 0x52, 0xbe, 0x33, 0xdf, 0xf6, 0x1a, 0xa4, 0x48, 0x61, 0x8d}, + {0x0, 0x1c, 0x38, 0x24, 0x70, 0x6c, 0x48, 0x54, 0xe0, 0xfc, 0xd8, 0xc4, 0x90, 0x8c, 0xa8, 0xb4}, + {0x0, 0xc, 0x18, 0x14, 0x30, 0x3c, 0x28, 0x24, 0x60, 0x6c, 0x78, 0x74, 0x50, 0x5c, 0x48, 0x44}, + {0x0, 0x3c, 0x78, 0x44, 0xf0, 0xcc, 0x88, 0xb4, 0xfd, 0xc1, 0x85, 0xb9, 0xd, 0x31, 0x75, 0x49}, + {0x0, 0x2c, 0x58, 0x74, 0xb0, 0x9c, 0xe8, 0xc4, 0x7d, 0x51, 0x25, 0x9, 0xcd, 0xe1, 0x95, 0xb9}, + {0x0, 0x5c, 0xb8, 0xe4, 0x6d, 0x31, 0xd5, 0x89, 0xda, 0x86, 0x62, 0x3e, 0xb7, 0xeb, 0xf, 0x53}, + {0x0, 0x4c, 0x98, 0xd4, 0x2d, 0x61, 0xb5, 0xf9, 0x5a, 0x16, 0xc2, 0x8e, 0x77, 0x3b, 0xef, 0xa3}, + {0x0, 0x7c, 0xf8, 0x84, 0xed, 0x91, 0x15, 0x69, 0xc7, 0xbb, 0x3f, 0x43, 0x2a, 0x56, 0xd2, 0xae}, + {0x0, 0x6c, 0xd8, 0xb4, 0xad, 0xc1, 0x75, 0x19, 0x47, 0x2b, 0x9f, 0xf3, 0xea, 0x86, 0x32, 0x5e}, + {0x0, 0x81, 0x1f, 0x9e, 0x3e, 0xbf, 0x21, 0xa0, 0x7c, 0xfd, 0x63, 0xe2, 0x42, 0xc3, 0x5d, 0xdc}, + {0x0, 0x91, 0x3f, 0xae, 0x7e, 0xef, 0x41, 0xd0, 0xfc, 0x6d, 0xc3, 0x52, 0x82, 0x13, 0xbd, 0x2c}, + {0x0, 0xa1, 0x5f, 0xfe, 0xbe, 0x1f, 0xe1, 0x40, 0x61, 0xc0, 0x3e, 0x9f, 0xdf, 0x7e, 0x80, 0x21}, + {0x0, 0xb1, 0x7f, 0xce, 0xfe, 0x4f, 0x81, 0x30, 0xe1, 0x50, 0x9e, 0x2f, 0x1f, 0xae, 0x60, 0xd1}, + {0x0, 0xc1, 0x9f, 0x5e, 0x23, 0xe2, 0xbc, 0x7d, 0x46, 0x87, 0xd9, 0x18, 0x65, 0xa4, 0xfa, 0x3b}, + {0x0, 0xd1, 0xbf, 0x6e, 0x63, 0xb2, 0xdc, 0xd, 0xc6, 0x17, 0x79, 0xa8, 0xa5, 0x74, 0x1a, 0xcb}, + {0x0, 0xe1, 0xdf, 0x3e, 0xa3, 0x42, 0x7c, 0x9d, 0x5b, 0xba, 0x84, 0x65, 0xf8, 0x19, 0x27, 0xc6}, + {0x0, 0xf1, 0xff, 0xe, 0xe3, 0x12, 0x1c, 0xed, 0xdb, 0x2a, 0x24, 0xd5, 0x38, 0xc9, 0xc7, 0x36}, + {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf}, + {0x0, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}, + {0x0, 0x21, 0x42, 0x63, 0x84, 0xa5, 0xc6, 0xe7, 0x15, 0x34, 0x57, 0x76, 0x91, 0xb0, 0xd3, 0xf2}, + {0x0, 0x31, 0x62, 0x53, 0xc4, 0xf5, 0xa6, 0x97, 0x95, 0xa4, 0xf7, 0xc6, 0x51, 0x60, 0x33, 0x2}, + {0x0, 0x41, 0x82, 0xc3, 0x19, 0x58, 0x9b, 0xda, 0x32, 0x73, 0xb0, 0xf1, 0x2b, 0x6a, 0xa9, 0xe8}, + {0x0, 0x51, 0xa2, 0xf3, 0x59, 0x8, 0xfb, 0xaa, 0xb2, 0xe3, 0x10, 0x41, 0xeb, 0xba, 0x49, 0x18}, + {0x0, 0x61, 0xc2, 0xa3, 0x99, 0xf8, 0x5b, 0x3a, 0x2f, 0x4e, 0xed, 0x8c, 0xb6, 0xd7, 0x74, 0x15}, + {0x0, 0x71, 0xe2, 0x93, 0xd9, 0xa8, 0x3b, 0x4a, 0xaf, 0xde, 0x4d, 0x3c, 0x76, 0x7, 0x94, 0xe5}, + {0x0, 0xa6, 0x51, 0xf7, 0xa2, 0x4, 0xf3, 0x55, 0x59, 0xff, 0x8, 0xae, 0xfb, 0x5d, 0xaa, 0xc}, + {0x0, 0xb6, 0x71, 0xc7, 0xe2, 0x54, 0x93, 0x25, 0xd9, 0x6f, 0xa8, 0x1e, 0x3b, 0x8d, 0x4a, 0xfc}, + {0x0, 0x86, 0x11, 0x97, 0x22, 0xa4, 0x33, 0xb5, 0x44, 0xc2, 0x55, 0xd3, 0x66, 0xe0, 0x77, 0xf1}, + {0x0, 0x96, 0x31, 0xa7, 0x62, 0xf4, 0x53, 0xc5, 0xc4, 0x52, 0xf5, 0x63, 0xa6, 0x30, 0x97, 0x1}, + {0x0, 0xe6, 0xd1, 0x37, 0xbf, 0x59, 0x6e, 0x88, 0x63, 0x85, 0xb2, 0x54, 0xdc, 0x3a, 0xd, 0xeb}, + {0x0, 0xf6, 0xf1, 0x7, 0xff, 0x9, 0xe, 0xf8, 0xe3, 0x15, 0x12, 0xe4, 0x1c, 0xea, 0xed, 0x1b}, + {0x0, 0xc6, 0x91, 0x57, 0x3f, 0xf9, 0xae, 0x68, 0x7e, 0xb8, 0xef, 0x29, 0x41, 0x87, 0xd0, 0x16}, + {0x0, 0xd6, 0xb1, 0x67, 0x7f, 0xa9, 0xce, 0x18, 0xfe, 0x28, 0x4f, 0x99, 0x81, 0x57, 0x30, 0xe6}, + {0x0, 0x26, 0x4c, 0x6a, 0x98, 0xbe, 0xd4, 0xf2, 0x2d, 0xb, 0x61, 0x47, 0xb5, 0x93, 0xf9, 0xdf}, + {0x0, 0x36, 0x6c, 0x5a, 0xd8, 0xee, 0xb4, 0x82, 0xad, 0x9b, 0xc1, 0xf7, 0x75, 0x43, 0x19, 0x2f}, + {0x0, 0x6, 0xc, 0xa, 0x18, 0x1e, 0x14, 0x12, 0x30, 0x36, 0x3c, 0x3a, 0x28, 0x2e, 0x24, 0x22}, + {0x0, 0x16, 0x2c, 0x3a, 0x58, 0x4e, 0x74, 0x62, 0xb0, 0xa6, 0x9c, 0x8a, 0xe8, 0xfe, 0xc4, 0xd2}, + {0x0, 0x66, 0xcc, 0xaa, 0x85, 0xe3, 0x49, 0x2f, 0x17, 0x71, 0xdb, 0xbd, 0x92, 0xf4, 0x5e, 0x38}, + {0x0, 0x76, 0xec, 0x9a, 0xc5, 0xb3, 0x29, 0x5f, 0x97, 0xe1, 0x7b, 0xd, 0x52, 0x24, 0xbe, 0xc8}, + {0x0, 0x46, 0x8c, 0xca, 0x5, 0x43, 0x89, 0xcf, 0xa, 0x4c, 0x86, 0xc0, 0xf, 0x49, 0x83, 0xc5}, + {0x0, 0x56, 0xac, 0xfa, 0x45, 0x13, 0xe9, 0xbf, 0x8a, 0xdc, 0x26, 0x70, 0xcf, 0x99, 0x63, 0x35}, + {0x0, 0xbb, 0x6b, 0xd0, 0xd6, 0x6d, 0xbd, 0x6, 0xb1, 0xa, 0xda, 0x61, 0x67, 0xdc, 0xc, 0xb7}, + {0x0, 0xab, 0x4b, 0xe0, 0x96, 0x3d, 0xdd, 0x76, 0x31, 0x9a, 0x7a, 0xd1, 0xa7, 0xc, 0xec, 0x47}, + {0x0, 0x9b, 0x2b, 0xb0, 0x56, 0xcd, 0x7d, 0xe6, 0xac, 0x37, 0x87, 0x1c, 0xfa, 0x61, 0xd1, 0x4a}, + {0x0, 0x8b, 0xb, 0x80, 0x16, 0x9d, 0x1d, 0x96, 0x2c, 0xa7, 0x27, 0xac, 0x3a, 0xb1, 0x31, 0xba}, + {0x0, 0xfb, 0xeb, 0x10, 0xcb, 0x30, 0x20, 0xdb, 0x8b, 0x70, 0x60, 0x9b, 0x40, 0xbb, 0xab, 0x50}, + {0x0, 0xeb, 0xcb, 0x20, 0x8b, 0x60, 0x40, 0xab, 0xb, 0xe0, 0xc0, 0x2b, 0x80, 0x6b, 0x4b, 0xa0}, + {0x0, 0xdb, 0xab, 0x70, 0x4b, 0x90, 0xe0, 0x3b, 0x96, 0x4d, 0x3d, 0xe6, 0xdd, 0x6, 0x76, 0xad}, + {0x0, 0xcb, 0x8b, 0x40, 0xb, 0xc0, 0x80, 0x4b, 0x16, 0xdd, 0x9d, 0x56, 0x1d, 0xd6, 0x96, 0x5d}, + {0x0, 0x3b, 0x76, 0x4d, 0xec, 0xd7, 0x9a, 0xa1, 0xc5, 0xfe, 0xb3, 0x88, 0x29, 0x12, 0x5f, 0x64}, + {0x0, 0x2b, 0x56, 0x7d, 0xac, 0x87, 0xfa, 0xd1, 0x45, 0x6e, 0x13, 0x38, 0xe9, 0xc2, 0xbf, 0x94}, + {0x0, 0x1b, 0x36, 0x2d, 0x6c, 0x77, 0x5a, 0x41, 0xd8, 0xc3, 0xee, 0xf5, 0xb4, 0xaf, 0x82, 0x99}, + {0x0, 0xb, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31, 0x58, 0x53, 0x4e, 0x45, 0x74, 0x7f, 0x62, 0x69}, + {0x0, 0x7b, 0xf6, 0x8d, 0xf1, 0x8a, 0x7, 0x7c, 0xff, 0x84, 0x9, 0x72, 0xe, 0x75, 0xf8, 0x83}, + {0x0, 0x6b, 0xd6, 0xbd, 0xb1, 0xda, 0x67, 0xc, 0x7f, 0x14, 0xa9, 0xc2, 0xce, 0xa5, 0x18, 0x73}, + {0x0, 0x5b, 0xb6, 0xed, 0x71, 0x2a, 0xc7, 0x9c, 0xe2, 0xb9, 0x54, 0xf, 0x93, 0xc8, 0x25, 0x7e}, + {0x0, 0x4b, 0x96, 0xdd, 0x31, 0x7a, 0xa7, 0xec, 0x62, 0x29, 0xf4, 0xbf, 0x53, 0x18, 0xc5, 0x8e}} + +// galMultiply multiplies to elements of the field. +// Uses lookup table ~40% faster +func galMultiply(a, b byte) byte { + return mulTable[a][b] +} + +// Original function: +/* +// galMultiply multiplies to elements of the field. +func galMultiply(a, b byte) byte { + if a == 0 || b == 0 { + return 0 + } + logA := int(logTable[a]) + logB := int(logTable[b]) + return expTable[logA+logB] +} +*/ + +// galDivide is inverse of galMultiply. +func galDivide(a, b byte) byte { + if a == 0 { + return 0 + } + if b == 0 { + panic("Argument 'divisor' is 0") + } + logA := int(logTable[a]) + logB := int(logTable[b]) + logResult := logA - logB + if logResult < 0 { + logResult += 255 + } + return expTable[logResult] +} + +// Computes a**n. +// +// The result will be the same as multiplying a times itself n times. +func galExp(a byte, n int) byte { + if n == 0 { + return 1 + } + if a == 0 { + return 0 + } + + logA := logTable[a] + logResult := int(logA) * n + for logResult >= 255 { + logResult -= 255 + } + return byte(expTable[logResult]) +} diff --git a/vendor/github.com/klauspost/reedsolomon/galois_amd64.go b/vendor/github.com/klauspost/reedsolomon/galois_amd64.go new file mode 100644 index 0000000..aeebdbb --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/galois_amd64.go @@ -0,0 +1,91 @@ +//+build !noasm +//+build !appengine + +// Copyright 2015, Klaus Post, see LICENSE for details. + +package reedsolomon + +//go:noescape +func galMulSSSE3(low, high, in, out []byte) + +//go:noescape +func galMulSSSE3Xor(low, high, in, out []byte) + +//go:noescape +func galMulAVX2Xor(low, high, in, out []byte) + +//go:noescape +func galMulAVX2(low, high, in, out []byte) + +//go:noescape +func sSE2XorSlice(in, out []byte) + +// This is what the assembler routines do in blocks of 16 bytes: +/* +func galMulSSSE3(low, high, in, out []byte) { + for n, input := range in { + l := input & 0xf + h := input >> 4 + out[n] = low[l] ^ high[h] + } +} + +func galMulSSSE3Xor(low, high, in, out []byte) { + for n, input := range in { + l := input & 0xf + h := input >> 4 + out[n] ^= low[l] ^ high[h] + } +} +*/ + +func galMulSlice(c byte, in, out []byte, ssse3, avx2 bool) { + var done int + if avx2 { + galMulAVX2(mulTableLow[c][:], mulTableHigh[c][:], in, out) + done = (len(in) >> 5) << 5 + } else if ssse3 { + galMulSSSE3(mulTableLow[c][:], mulTableHigh[c][:], in, out) + done = (len(in) >> 4) << 4 + } + remain := len(in) - done + if remain > 0 { + mt := mulTable[c] + for i := done; i < len(in); i++ { + out[i] = mt[in[i]] + } + } +} + +func galMulSliceXor(c byte, in, out []byte, ssse3, avx2 bool) { + var done int + if avx2 { + galMulAVX2Xor(mulTableLow[c][:], mulTableHigh[c][:], in, out) + done = (len(in) >> 5) << 5 + } else if ssse3 { + galMulSSSE3Xor(mulTableLow[c][:], mulTableHigh[c][:], in, out) + done = (len(in) >> 4) << 4 + } + remain := len(in) - done + if remain > 0 { + mt := mulTable[c] + for i := done; i < len(in); i++ { + out[i] ^= mt[in[i]] + } + } +} + +// slice galois add +func sliceXor(in, out []byte, sse2 bool) { + var done int + if sse2 { + sSE2XorSlice(in, out) + done = (len(in) >> 4) << 4 + } + remain := len(in) - done + if remain > 0 { + for i := done; i < len(in); i++ { + out[i] ^= in[i] + } + } +} diff --git a/vendor/github.com/klauspost/reedsolomon/galois_amd64.s b/vendor/github.com/klauspost/reedsolomon/galois_amd64.s new file mode 100644 index 0000000..8a294c1 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/galois_amd64.s @@ -0,0 +1,236 @@ +//+build !noasm !appengine + +// Copyright 2015, Klaus Post, see LICENSE for details. + +// Based on http://www.snia.org/sites/default/files2/SDC2013/presentations/NewThinking/EthanMiller_Screaming_Fast_Galois_Field%20Arithmetic_SIMD%20Instructions.pdf +// and http://jerasure.org/jerasure/gf-complete/tree/master + +// func galMulSSSE3Xor(low, high, in, out []byte) +TEXT ·galMulSSSE3Xor(SB), 7, $0 + MOVQ low+0(FP), SI // SI: &low + MOVQ high+24(FP), DX // DX: &high + MOVOU (SI), X6 // X6 low + MOVOU (DX), X7 // X7: high + MOVQ $15, BX // BX: low mask + MOVQ BX, X8 + PXOR X5, X5 + MOVQ in+48(FP), SI // R11: &in + MOVQ in_len+56(FP), R9 // R9: len(in) + MOVQ out+72(FP), DX // DX: &out + PSHUFB X5, X8 // X8: lomask (unpacked) + SHRQ $4, R9 // len(in) / 16 + MOVQ SI, AX + MOVQ DX, BX + ANDQ $15, AX + ANDQ $15, BX + CMPQ R9, $0 + JEQ done_xor + ORQ AX, BX + CMPQ BX, $0 + JNZ loopback_xor + +loopback_xor_aligned: + MOVOA (SI), X0 // in[x] + MOVOA (DX), X4 // out[x] + MOVOA X0, X1 // in[x] + MOVOA X6, X2 // low copy + MOVOA X7, X3 // high copy + PSRLQ $4, X1 // X1: high input + PAND X8, X0 // X0: low input + PAND X8, X1 // X0: high input + PSHUFB X0, X2 // X2: mul low part + PSHUFB X1, X3 // X3: mul high part + PXOR X2, X3 // X3: Result + PXOR X4, X3 // X3: Result xor existing out + MOVOA X3, (DX) // Store + ADDQ $16, SI // in+=16 + ADDQ $16, DX // out+=16 + SUBQ $1, R9 + JNZ loopback_xor_aligned + JMP done_xor + +loopback_xor: + MOVOU (SI), X0 // in[x] + MOVOU (DX), X4 // out[x] + MOVOU X0, X1 // in[x] + MOVOU X6, X2 // low copy + MOVOU X7, X3 // high copy + PSRLQ $4, X1 // X1: high input + PAND X8, X0 // X0: low input + PAND X8, X1 // X0: high input + PSHUFB X0, X2 // X2: mul low part + PSHUFB X1, X3 // X3: mul high part + PXOR X2, X3 // X3: Result + PXOR X4, X3 // X3: Result xor existing out + MOVOU X3, (DX) // Store + ADDQ $16, SI // in+=16 + ADDQ $16, DX // out+=16 + SUBQ $1, R9 + JNZ loopback_xor + +done_xor: + RET + +// func galMulSSSE3(low, high, in, out []byte) +TEXT ·galMulSSSE3(SB), 7, $0 + MOVQ low+0(FP), SI // SI: &low + MOVQ high+24(FP), DX // DX: &high + MOVOU (SI), X6 // X6 low + MOVOU (DX), X7 // X7: high + MOVQ $15, BX // BX: low mask + MOVQ BX, X8 + PXOR X5, X5 + MOVQ in+48(FP), SI // R11: &in + MOVQ in_len+56(FP), R9 // R9: len(in) + MOVQ out+72(FP), DX // DX: &out + PSHUFB X5, X8 // X8: lomask (unpacked) + MOVQ SI, AX + MOVQ DX, BX + SHRQ $4, R9 // len(in) / 16 + ANDQ $15, AX + ANDQ $15, BX + CMPQ R9, $0 + JEQ done + ORQ AX, BX + CMPQ BX, $0 + JNZ loopback + +loopback_aligned: + MOVOA (SI), X0 // in[x] + MOVOA X0, X1 // in[x] + MOVOA X6, X2 // low copy + MOVOA X7, X3 // high copy + PSRLQ $4, X1 // X1: high input + PAND X8, X0 // X0: low input + PAND X8, X1 // X0: high input + PSHUFB X0, X2 // X2: mul low part + PSHUFB X1, X3 // X3: mul high part + PXOR X2, X3 // X3: Result + MOVOA X3, (DX) // Store + ADDQ $16, SI // in+=16 + ADDQ $16, DX // out+=16 + SUBQ $1, R9 + JNZ loopback_aligned + JMP done + +loopback: + MOVOU (SI), X0 // in[x] + MOVOU X0, X1 // in[x] + MOVOA X6, X2 // low copy + MOVOA X7, X3 // high copy + PSRLQ $4, X1 // X1: high input + PAND X8, X0 // X0: low input + PAND X8, X1 // X0: high input + PSHUFB X0, X2 // X2: mul low part + PSHUFB X1, X3 // X3: mul high part + PXOR X2, X3 // X3: Result + MOVOU X3, (DX) // Store + ADDQ $16, SI // in+=16 + ADDQ $16, DX // out+=16 + SUBQ $1, R9 + JNZ loopback + +done: + RET + +// func galMulAVX2Xor(low, high, in, out []byte) +TEXT ·galMulAVX2Xor(SB), 7, $0 + MOVQ low+0(FP), SI // SI: &low + MOVQ high+24(FP), DX // DX: &high + MOVQ $15, BX // BX: low mask + MOVQ BX, X5 + MOVOU (SI), X6 // X6: low + MOVOU (DX), X7 // X7: high + MOVQ in_len+56(FP), R9 // R9: len(in) + + VINSERTI128 $1, X6, Y6, Y6 // low + VINSERTI128 $1, X7, Y7, Y7 // high + VPBROADCASTB X5, Y8 // Y8: lomask (unpacked) + + SHRQ $5, R9 // len(in) / 32 + MOVQ out+72(FP), DX // DX: &out + MOVQ in+48(FP), SI // SI: &in + TESTQ R9, R9 + JZ done_xor_avx2 + +loopback_xor_avx2: + VMOVDQU (SI), Y0 + VMOVDQU (DX), Y4 + VPSRLQ $4, Y0, Y1 // Y1: high input + VPAND Y8, Y0, Y0 // Y0: low input + VPAND Y8, Y1, Y1 // Y1: high input + VPSHUFB Y0, Y6, Y2 // Y2: mul low part + VPSHUFB Y1, Y7, Y3 // Y3: mul high part + VPXOR Y3, Y2, Y3 // Y3: Result + VPXOR Y4, Y3, Y4 // Y4: Result + VMOVDQU Y4, (DX) + + ADDQ $32, SI // in+=32 + ADDQ $32, DX // out+=32 + SUBQ $1, R9 + JNZ loopback_xor_avx2 + +done_xor_avx2: + VZEROUPPER + RET + +// func galMulAVX2(low, high, in, out []byte) +TEXT ·galMulAVX2(SB), 7, $0 + MOVQ low+0(FP), SI // SI: &low + MOVQ high+24(FP), DX // DX: &high + MOVQ $15, BX // BX: low mask + MOVQ BX, X5 + MOVOU (SI), X6 // X6: low + MOVOU (DX), X7 // X7: high + MOVQ in_len+56(FP), R9 // R9: len(in) + + VINSERTI128 $1, X6, Y6, Y6 // low + VINSERTI128 $1, X7, Y7, Y7 // high + VPBROADCASTB X5, Y8 // Y8: lomask (unpacked) + + SHRQ $5, R9 // len(in) / 32 + MOVQ out+72(FP), DX // DX: &out + MOVQ in+48(FP), SI // SI: &in + TESTQ R9, R9 + JZ done_avx2 + +loopback_avx2: + VMOVDQU (SI), Y0 + VPSRLQ $4, Y0, Y1 // Y1: high input + VPAND Y8, Y0, Y0 // Y0: low input + VPAND Y8, Y1, Y1 // Y1: high input + VPSHUFB Y0, Y6, Y2 // Y2: mul low part + VPSHUFB Y1, Y7, Y3 // Y3: mul high part + VPXOR Y3, Y2, Y4 // Y4: Result + VMOVDQU Y4, (DX) + + ADDQ $32, SI // in+=32 + ADDQ $32, DX // out+=32 + SUBQ $1, R9 + JNZ loopback_avx2 + +done_avx2: + VZEROUPPER + RET + +// func sSE2XorSlice(in, out []byte) +TEXT ·sSE2XorSlice(SB), 7, $0 + MOVQ in+0(FP), SI // SI: &in + MOVQ in_len+8(FP), R9 // R9: len(in) + MOVQ out+24(FP), DX // DX: &out + SHRQ $4, R9 // len(in) / 16 + CMPQ R9, $0 + JEQ done_xor_sse2 + +loopback_xor_sse2: + MOVOU (SI), X0 // in[x] + MOVOU (DX), X1 // out[x] + PXOR X0, X1 + MOVOU X1, (DX) + ADDQ $16, SI // in+=16 + ADDQ $16, DX // out+=16 + SUBQ $1, R9 + JNZ loopback_xor_sse2 + +done_xor_sse2: + RET diff --git a/vendor/github.com/klauspost/reedsolomon/galois_arm64.go b/vendor/github.com/klauspost/reedsolomon/galois_arm64.go new file mode 100644 index 0000000..a9e533f --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/galois_arm64.go @@ -0,0 +1,48 @@ +//+build !noasm +//+build !appengine + +// Copyright 2015, Klaus Post, see LICENSE for details. +// Copyright 2017, Minio, Inc. + +package reedsolomon + +//go:noescape +func galMulNEON(c uint64, in, out []byte) + +//go:noescape +func galMulXorNEON(c uint64, in, out []byte) + +func galMulSlice(c byte, in, out []byte, ssse3, avx2 bool) { + var done int + galMulNEON(uint64(c), in, out) + done = (len(in) >> 5) << 5 + + remain := len(in) - done + if remain > 0 { + mt := mulTable[c] + for i := done; i < len(in); i++ { + out[i] = mt[in[i]] + } + } +} + +func galMulSliceXor(c byte, in, out []byte, ssse3, avx2 bool) { + var done int + galMulXorNEON(uint64(c), in, out) + done = (len(in) >> 5) << 5 + + remain := len(in) - done + if remain > 0 { + mt := mulTable[c] + for i := done; i < len(in); i++ { + out[i] ^= mt[in[i]] + } + } +} + +// slice galois add +func sliceXor(in, out []byte, sse2 bool) { + for n, input := range in { + out[n] ^= input + } +} diff --git a/vendor/github.com/klauspost/reedsolomon/galois_arm64.s b/vendor/github.com/klauspost/reedsolomon/galois_arm64.s new file mode 100644 index 0000000..b18e258 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/galois_arm64.s @@ -0,0 +1,141 @@ +//+build !noasm !appengine + +// Copyright 2015, Klaus Post, see LICENSE for details. +// Copyright 2017, Minio, Inc. + +// Use github.com/minio/asm2plan9s on this file to assemble ARM instructions to +// the opcodes of their Plan9 equivalents + +// polynomial multiplication +#define POLYNOMIAL_MULTIPLICATION \ + WORD $0x0e3ce340 \ // pmull v0.8h,v26.8b,v28.8b + WORD $0x4e3ce346 \ // pmull2 v6.8h,v26.16b,v28.16b + WORD $0x0e3ce36c \ // pmull v12.8h,v27.8b,v28.8b + WORD $0x4e3ce372 // pmull2 v18.8h,v27.16b,v28.16b + +// first reduction +#define FIRST_REDUCTION \ + WORD $0x0f088402 \ // shrn v2.8b, v0.8h, #8 + WORD $0x0f0884c8 \ // shrn v8.8b, v6.8h, #8 + WORD $0x0f08858e \ // shrn v14.8b, v12.8h, #8 + WORD $0x0f088654 \ // shrn v20.8b, v18.8h, #8 + WORD $0x0e22e3c3 \ // pmull v3.8h,v30.8b,v2.8b + WORD $0x0e28e3c9 \ // pmull v9.8h,v30.8b,v8.8b + WORD $0x0e2ee3cf \ // pmull v15.8h,v30.8b,v14.8b + WORD $0x0e34e3d5 \ // pmull v21.8h,v30.8b,v20.8b + WORD $0x6e201c60 \ // eor v0.16b,v3.16b,v0.16b + WORD $0x6e261d26 \ // eor v6.16b,v9.16b,v6.16b + WORD $0x6e2c1dec \ // eor v12.16b,v15.16b,v12.16b + WORD $0x6e321eb2 // eor v18.16b,v21.16b,v18.16b + +// second reduction +#define SECOND_REDUCTION \ + WORD $0x0f088404 \ // shrn v4.8b, v0.8h, #8 + WORD $0x0f0884ca \ // shrn v10.8b, v6.8h, #8 + WORD $0x0f088590 \ // shrn v16.8b, v12.8h, #8 + WORD $0x0f088656 \ // shrn v22.8b, v18.8h, #8 + WORD $0x6e241c44 \ // eor v4.16b,v2.16b,v4.16b + WORD $0x6e2a1d0a \ // eor v10.16b,v8.16b,v10.16b + WORD $0x6e301dd0 \ // eor v16.16b,v14.16b,v16.16b + WORD $0x6e361e96 \ // eor v22.16b,v20.16b,v22.16b + WORD $0x0e24e3c5 \ // pmull v5.8h,v30.8b,v4.8b + WORD $0x0e2ae3cb \ // pmull v11.8h,v30.8b,v10.8b + WORD $0x0e30e3d1 \ // pmull v17.8h,v30.8b,v16.8b + WORD $0x0e36e3d7 \ // pmull v23.8h,v30.8b,v22.8b + WORD $0x6e201ca0 \ // eor v0.16b,v5.16b,v0.16b + WORD $0x6e261d61 \ // eor v1.16b,v11.16b,v6.16b + WORD $0x6e2c1e22 \ // eor v2.16b,v17.16b,v12.16b + WORD $0x6e321ee3 // eor v3.16b,v23.16b,v18.16b + +// func galMulNEON(c uint64, in, out []byte) +TEXT ·galMulNEON(SB), 7, $0 + MOVD c+0(FP), R0 + MOVD in_base+8(FP), R1 + MOVD in_len+16(FP), R2 // length of message + MOVD out_base+32(FP), R5 + SUBS $32, R2 + BMI complete + + // Load constants table pointer + MOVD $·constants(SB), R3 + + // and load constants into v30 & v31 + WORD $0x4c40a07e // ld1 {v30.16b-v31.16b}, [x3] + + WORD $0x4e010c1c // dup v28.16b, w0 + +loop: + // Main loop + WORD $0x4cdfa83a // ld1 {v26.4s-v27.4s}, [x1], #32 + + POLYNOMIAL_MULTIPLICATION + + FIRST_REDUCTION + + SECOND_REDUCTION + + // combine results + WORD $0x4e1f2000 // tbl v0.16b,{v0.16b,v1.16b},v31.16b + WORD $0x4e1f2041 // tbl v1.16b,{v2.16b,v3.16b},v31.16b + + // Store result + WORD $0x4c9faca0 // st1 {v0.2d-v1.2d}, [x5], #32 + + SUBS $32, R2 + BPL loop + +complete: + RET + +// func galMulXorNEON(c uint64, in, out []byte) +TEXT ·galMulXorNEON(SB), 7, $0 + MOVD c+0(FP), R0 + MOVD in_base+8(FP), R1 + MOVD in_len+16(FP), R2 // length of message + MOVD out_base+32(FP), R5 + SUBS $32, R2 + BMI completeXor + + // Load constants table pointer + MOVD $·constants(SB), R3 + + // and load constants into v30 & v31 + WORD $0x4c40a07e // ld1 {v30.16b-v31.16b}, [x3] + + WORD $0x4e010c1c // dup v28.16b, w0 + +loopXor: + // Main loop + WORD $0x4cdfa83a // ld1 {v26.4s-v27.4s}, [x1], #32 + WORD $0x4c40a8b8 // ld1 {v24.4s-v25.4s}, [x5] + + POLYNOMIAL_MULTIPLICATION + + FIRST_REDUCTION + + SECOND_REDUCTION + + // combine results + WORD $0x4e1f2000 // tbl v0.16b,{v0.16b,v1.16b},v31.16b + WORD $0x4e1f2041 // tbl v1.16b,{v2.16b,v3.16b},v31.16b + + // Xor result and store + WORD $0x6e381c00 // eor v0.16b,v0.16b,v24.16b + WORD $0x6e391c21 // eor v1.16b,v1.16b,v25.16b + WORD $0x4c9faca0 // st1 {v0.2d-v1.2d}, [x5], #32 + + SUBS $32, R2 + BPL loopXor + +completeXor: + RET + +// Constants table +// generating polynomial is 29 (= 0x1d) +DATA ·constants+0x0(SB)/8, $0x1d1d1d1d1d1d1d1d +DATA ·constants+0x8(SB)/8, $0x1d1d1d1d1d1d1d1d +// constant for TBL instruction +DATA ·constants+0x10(SB)/8, $0x0e0c0a0806040200 +DATA ·constants+0x18(SB)/8, $0x1e1c1a1816141210 + +GLOBL ·constants(SB), 8, $32 diff --git a/vendor/github.com/klauspost/reedsolomon/galois_noasm.go b/vendor/github.com/klauspost/reedsolomon/galois_noasm.go new file mode 100644 index 0000000..ebde7be --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/galois_noasm.go @@ -0,0 +1,27 @@ +//+build !amd64 noasm appengine +//+build !arm64 noasm appengine + +// Copyright 2015, Klaus Post, see LICENSE for details. + +package reedsolomon + +func galMulSlice(c byte, in, out []byte, ssse3, avx2 bool) { + mt := mulTable[c] + for n, input := range in { + out[n] = mt[input] + } +} + +func galMulSliceXor(c byte, in, out []byte, ssse3, avx2 bool) { + mt := mulTable[c] + for n, input := range in { + out[n] ^= mt[input] + } +} + +// slice galois add +func sliceXor(in, out []byte, sse2 bool) { + for n, input := range in { + out[n] ^= input + } +} diff --git a/vendor/github.com/klauspost/reedsolomon/gentables.go b/vendor/github.com/klauspost/reedsolomon/gentables.go new file mode 100644 index 0000000..843aade --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/gentables.go @@ -0,0 +1,132 @@ +//+build ignore + +package main + +import ( + "fmt" +) + +var logTable = [fieldSize]int16{ + -1, 0, 1, 25, 2, 50, 26, 198, + 3, 223, 51, 238, 27, 104, 199, 75, + 4, 100, 224, 14, 52, 141, 239, 129, + 28, 193, 105, 248, 200, 8, 76, 113, + 5, 138, 101, 47, 225, 36, 15, 33, + 53, 147, 142, 218, 240, 18, 130, 69, + 29, 181, 194, 125, 106, 39, 249, 185, + 201, 154, 9, 120, 77, 228, 114, 166, + 6, 191, 139, 98, 102, 221, 48, 253, + 226, 152, 37, 179, 16, 145, 34, 136, + 54, 208, 148, 206, 143, 150, 219, 189, + 241, 210, 19, 92, 131, 56, 70, 64, + 30, 66, 182, 163, 195, 72, 126, 110, + 107, 58, 40, 84, 250, 133, 186, 61, + 202, 94, 155, 159, 10, 21, 121, 43, + 78, 212, 229, 172, 115, 243, 167, 87, + 7, 112, 192, 247, 140, 128, 99, 13, + 103, 74, 222, 237, 49, 197, 254, 24, + 227, 165, 153, 119, 38, 184, 180, 124, + 17, 68, 146, 217, 35, 32, 137, 46, + 55, 63, 209, 91, 149, 188, 207, 205, + 144, 135, 151, 178, 220, 252, 190, 97, + 242, 86, 211, 171, 20, 42, 93, 158, + 132, 60, 57, 83, 71, 109, 65, 162, + 31, 45, 67, 216, 183, 123, 164, 118, + 196, 23, 73, 236, 127, 12, 111, 246, + 108, 161, 59, 82, 41, 157, 85, 170, + 251, 96, 134, 177, 187, 204, 62, 90, + 203, 89, 95, 176, 156, 169, 160, 81, + 11, 245, 22, 235, 122, 117, 44, 215, + 79, 174, 213, 233, 230, 231, 173, 232, + 116, 214, 244, 234, 168, 80, 88, 175, +} + +const ( + // The number of elements in the field. + fieldSize = 256 + + // The polynomial used to generate the logarithm table. + // + // There are a number of polynomials that work to generate + // a Galois field of 256 elements. The choice is arbitrary, + // and we just use the first one. + // + // The possibilities are: 29, 43, 45, 77, 95, 99, 101, 105, + //* 113, 135, 141, 169, 195, 207, 231, and 245. + generatingPolynomial = 29 +) + +func main() { + t := generateExpTable() + fmt.Printf("var expTable = %#v\n", t) + //t2 := generateMulTableSplit(t) + //fmt.Printf("var mulTable = %#v\n", t2) + low, high := generateMulTableHalf(t) + fmt.Printf("var mulTableLow = %#v\n", low) + fmt.Printf("var mulTableHigh = %#v\n", high) +} + +/** + * Generates the inverse log table. + */ +func generateExpTable() []byte { + result := make([]byte, fieldSize*2-2) + for i := 1; i < fieldSize; i++ { + log := logTable[i] + result[log] = byte(i) + result[log+fieldSize-1] = byte(i) + } + return result +} + +func generateMulTable(expTable []byte) []byte { + result := make([]byte, 256*256) + for v := range result { + a := byte(v & 0xff) + b := byte(v >> 8) + if a == 0 || b == 0 { + result[v] = 0 + continue + } + logA := int(logTable[a]) + logB := int(logTable[b]) + result[v] = expTable[logA+logB] + } + return result +} + +func generateMulTableSplit(expTable []byte) [256][256]byte { + var result [256][256]byte + for a := range result { + for b := range result[a] { + if a == 0 || b == 0 { + result[a][b] = 0 + continue + } + logA := int(logTable[a]) + logB := int(logTable[b]) + result[a][b] = expTable[logA+logB] + } + } + return result +} + +func generateMulTableHalf(expTable []byte) (low [256][16]byte, high [256][16]byte) { + for a := range low { + for b := range low { + result := 0 + if !(a == 0 || b == 0) { + logA := int(logTable[a]) + logB := int(logTable[b]) + result = int(expTable[logA+logB]) + } + if (b & 0xf) == b { + low[a][b] = byte(result) + } + if (b & 0xf0) == b { + high[a][b>>4] = byte(result) + } + } + } + return +} diff --git a/vendor/github.com/klauspost/reedsolomon/inversion_tree.go b/vendor/github.com/klauspost/reedsolomon/inversion_tree.go new file mode 100644 index 0000000..c9d8ab2 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/inversion_tree.go @@ -0,0 +1,160 @@ +/** + * A thread-safe tree which caches inverted matrices. + * + * Copyright 2016, Peter Collins + */ + +package reedsolomon + +import ( + "errors" + "sync" +) + +// The tree uses a Reader-Writer mutex to make it thread-safe +// when accessing cached matrices and inserting new ones. +type inversionTree struct { + mutex *sync.RWMutex + root inversionNode +} + +type inversionNode struct { + matrix matrix + children []*inversionNode +} + +// newInversionTree initializes a tree for storing inverted matrices. +// Note that the root node is the identity matrix as it implies +// there were no errors with the original data. +func newInversionTree(dataShards, parityShards int) inversionTree { + identity, _ := identityMatrix(dataShards) + root := inversionNode{ + matrix: identity, + children: make([]*inversionNode, dataShards+parityShards), + } + return inversionTree{ + mutex: &sync.RWMutex{}, + root: root, + } +} + +// GetInvertedMatrix returns the cached inverted matrix or nil if it +// is not found in the tree keyed on the indices of invalid rows. +func (t inversionTree) GetInvertedMatrix(invalidIndices []int) matrix { + // Lock the tree for reading before accessing the tree. + t.mutex.RLock() + defer t.mutex.RUnlock() + + // If no invalid indices were give we should return the root + // identity matrix. + if len(invalidIndices) == 0 { + return t.root.matrix + } + + // Recursively search for the inverted matrix in the tree, passing in + // 0 as the parent index as we start at the root of the tree. + return t.root.getInvertedMatrix(invalidIndices, 0) +} + +// errAlreadySet is returned if the root node matrix is overwritten +var errAlreadySet = errors.New("the root node identity matrix is already set") + +// InsertInvertedMatrix inserts a new inverted matrix into the tree +// keyed by the indices of invalid rows. The total number of shards +// is required for creating the proper length lists of child nodes for +// each node. +func (t inversionTree) InsertInvertedMatrix(invalidIndices []int, matrix matrix, shards int) error { + // If no invalid indices were given then we are done because the + // root node is already set with the identity matrix. + if len(invalidIndices) == 0 { + return errAlreadySet + } + + if !matrix.IsSquare() { + return errNotSquare + } + + // Lock the tree for writing and reading before accessing the tree. + t.mutex.Lock() + defer t.mutex.Unlock() + + // Recursively create nodes for the inverted matrix in the tree until + // we reach the node to insert the matrix to. We start by passing in + // 0 as the parent index as we start at the root of the tree. + t.root.insertInvertedMatrix(invalidIndices, matrix, shards, 0) + + return nil +} + +func (n inversionNode) getInvertedMatrix(invalidIndices []int, parent int) matrix { + // Get the child node to search next from the list of children. The + // list of children starts relative to the parent index passed in + // because the indices of invalid rows is sorted (by default). As we + // search recursively, the first invalid index gets popped off the list, + // so when searching through the list of children, use that first invalid + // index to find the child node. + firstIndex := invalidIndices[0] + node := n.children[firstIndex-parent] + + // If the child node doesn't exist in the list yet, fail fast by + // returning, so we can construct and insert the proper inverted matrix. + if node == nil { + return nil + } + + // If there's more than one invalid index left in the list we should + // keep searching recursively. + if len(invalidIndices) > 1 { + // Search recursively on the child node by passing in the invalid indices + // with the first index popped off the front. Also the parent index to + // pass down is the first index plus one. + return node.getInvertedMatrix(invalidIndices[1:], firstIndex+1) + } + // If there aren't any more invalid indices to search, we've found our + // node. Return it, however keep in mind that the matrix could still be + // nil because intermediary nodes in the tree are created sometimes with + // their inversion matrices uninitialized. + return node.matrix +} + +func (n inversionNode) insertInvertedMatrix(invalidIndices []int, matrix matrix, shards, parent int) { + // As above, get the child node to search next from the list of children. + // The list of children starts relative to the parent index passed in + // because the indices of invalid rows is sorted (by default). As we + // search recursively, the first invalid index gets popped off the list, + // so when searching through the list of children, use that first invalid + // index to find the child node. + firstIndex := invalidIndices[0] + node := n.children[firstIndex-parent] + + // If the child node doesn't exist in the list yet, create a new + // node because we have the writer lock and add it to the list + // of children. + if node == nil { + // Make the length of the list of children equal to the number + // of shards minus the first invalid index because the list of + // invalid indices is sorted, so only this length of errors + // are possible in the tree. + node = &inversionNode{ + children: make([]*inversionNode, shards-firstIndex), + } + // Insert the new node into the tree at the first index relative + // to the parent index that was given in this recursive call. + n.children[firstIndex-parent] = node + } + + // If there's more than one invalid index left in the list we should + // keep searching recursively in order to find the node to add our + // matrix. + if len(invalidIndices) > 1 { + // As above, search recursively on the child node by passing in + // the invalid indices with the first index popped off the front. + // Also the total number of shards and parent index are passed down + // which is equal to the first index plus one. + node.insertInvertedMatrix(invalidIndices[1:], matrix, shards, firstIndex+1) + } else { + // If there aren't any more invalid indices to search, we've found our + // node. Cache the inverted matrix in this node. + node.matrix = matrix + } +} diff --git a/vendor/github.com/klauspost/reedsolomon/matrix.go b/vendor/github.com/klauspost/reedsolomon/matrix.go new file mode 100644 index 0000000..339913a --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/matrix.go @@ -0,0 +1,279 @@ +/** + * Matrix Algebra over an 8-bit Galois Field + * + * Copyright 2015, Klaus Post + * Copyright 2015, Backblaze, Inc. + */ + +package reedsolomon + +import ( + "errors" + "fmt" + "strconv" + "strings" +) + +// byte[row][col] +type matrix [][]byte + +// newMatrix returns a matrix of zeros. +func newMatrix(rows, cols int) (matrix, error) { + if rows <= 0 { + return nil, errInvalidRowSize + } + if cols <= 0 { + return nil, errInvalidColSize + } + + m := matrix(make([][]byte, rows)) + for i := range m { + m[i] = make([]byte, cols) + } + return m, nil +} + +// NewMatrixData initializes a matrix with the given row-major data. +// Note that data is not copied from input. +func newMatrixData(data [][]byte) (matrix, error) { + m := matrix(data) + err := m.Check() + if err != nil { + return nil, err + } + return m, nil +} + +// IdentityMatrix returns an identity matrix of the given size. +func identityMatrix(size int) (matrix, error) { + m, err := newMatrix(size, size) + if err != nil { + return nil, err + } + for i := range m { + m[i][i] = 1 + } + return m, nil +} + +// errInvalidRowSize will be returned if attempting to create a matrix with negative or zero row number. +var errInvalidRowSize = errors.New("invalid row size") + +// errInvalidColSize will be returned if attempting to create a matrix with negative or zero column number. +var errInvalidColSize = errors.New("invalid column size") + +// errColSizeMismatch is returned if the size of matrix columns mismatch. +var errColSizeMismatch = errors.New("column size is not the same for all rows") + +func (m matrix) Check() error { + rows := len(m) + if rows <= 0 { + return errInvalidRowSize + } + cols := len(m[0]) + if cols <= 0 { + return errInvalidColSize + } + + for _, col := range m { + if len(col) != cols { + return errColSizeMismatch + } + } + return nil +} + +// String returns a human-readable string of the matrix contents. +// +// Example: [[1, 2], [3, 4]] +func (m matrix) String() string { + rowOut := make([]string, 0, len(m)) + for _, row := range m { + colOut := make([]string, 0, len(row)) + for _, col := range row { + colOut = append(colOut, strconv.Itoa(int(col))) + } + rowOut = append(rowOut, "["+strings.Join(colOut, ", ")+"]") + } + return "[" + strings.Join(rowOut, ", ") + "]" +} + +// Multiply multiplies this matrix (the one on the left) by another +// matrix (the one on the right) and returns a new matrix with the result. +func (m matrix) Multiply(right matrix) (matrix, error) { + if len(m[0]) != len(right) { + return nil, fmt.Errorf("columns on left (%d) is different than rows on right (%d)", len(m[0]), len(right)) + } + result, _ := newMatrix(len(m), len(right[0])) + for r, row := range result { + for c := range row { + var value byte + for i := range m[0] { + value ^= galMultiply(m[r][i], right[i][c]) + } + result[r][c] = value + } + } + return result, nil +} + +// Augment returns the concatenation of this matrix and the matrix on the right. +func (m matrix) Augment(right matrix) (matrix, error) { + if len(m) != len(right) { + return nil, errMatrixSize + } + + result, _ := newMatrix(len(m), len(m[0])+len(right[0])) + for r, row := range m { + for c := range row { + result[r][c] = m[r][c] + } + cols := len(m[0]) + for c := range right[0] { + result[r][cols+c] = right[r][c] + } + } + return result, nil +} + +// errMatrixSize is returned if matrix dimensions are doesn't match. +var errMatrixSize = errors.New("matrix sizes do not match") + +func (m matrix) SameSize(n matrix) error { + if len(m) != len(n) { + return errMatrixSize + } + for i := range m { + if len(m[i]) != len(n[i]) { + return errMatrixSize + } + } + return nil +} + +// Returns a part of this matrix. Data is copied. +func (m matrix) SubMatrix(rmin, cmin, rmax, cmax int) (matrix, error) { + result, err := newMatrix(rmax-rmin, cmax-cmin) + if err != nil { + return nil, err + } + // OPTME: If used heavily, use copy function to copy slice + for r := rmin; r < rmax; r++ { + for c := cmin; c < cmax; c++ { + result[r-rmin][c-cmin] = m[r][c] + } + } + return result, nil +} + +// SwapRows Exchanges two rows in the matrix. +func (m matrix) SwapRows(r1, r2 int) error { + if r1 < 0 || len(m) <= r1 || r2 < 0 || len(m) <= r2 { + return errInvalidRowSize + } + m[r2], m[r1] = m[r1], m[r2] + return nil +} + +// IsSquare will return true if the matrix is square +// and nil if the matrix is square +func (m matrix) IsSquare() bool { + return len(m) == len(m[0]) +} + +// errSingular is returned if the matrix is singular and cannot be inversed +var errSingular = errors.New("matrix is singular") + +// errNotSquare is returned if attempting to inverse a non-square matrix. +var errNotSquare = errors.New("only square matrices can be inverted") + +// Invert returns the inverse of this matrix. +// Returns ErrSingular when the matrix is singular and doesn't have an inverse. +// The matrix must be square, otherwise ErrNotSquare is returned. +func (m matrix) Invert() (matrix, error) { + if !m.IsSquare() { + return nil, errNotSquare + } + + size := len(m) + work, _ := identityMatrix(size) + work, _ = m.Augment(work) + + err := work.gaussianElimination() + if err != nil { + return nil, err + } + + return work.SubMatrix(0, size, size, size*2) +} + +func (m matrix) gaussianElimination() error { + rows := len(m) + columns := len(m[0]) + // Clear out the part below the main diagonal and scale the main + // diagonal to be 1. + for r := 0; r < rows; r++ { + // If the element on the diagonal is 0, find a row below + // that has a non-zero and swap them. + if m[r][r] == 0 { + for rowBelow := r + 1; rowBelow < rows; rowBelow++ { + if m[rowBelow][r] != 0 { + m.SwapRows(r, rowBelow) + break + } + } + } + // If we couldn't find one, the matrix is singular. + if m[r][r] == 0 { + return errSingular + } + // Scale to 1. + if m[r][r] != 1 { + scale := galDivide(1, m[r][r]) + for c := 0; c < columns; c++ { + m[r][c] = galMultiply(m[r][c], scale) + } + } + // Make everything below the 1 be a 0 by subtracting + // a multiple of it. (Subtraction and addition are + // both exclusive or in the Galois field.) + for rowBelow := r + 1; rowBelow < rows; rowBelow++ { + if m[rowBelow][r] != 0 { + scale := m[rowBelow][r] + for c := 0; c < columns; c++ { + m[rowBelow][c] ^= galMultiply(scale, m[r][c]) + } + } + } + } + + // Now clear the part above the main diagonal. + for d := 0; d < rows; d++ { + for rowAbove := 0; rowAbove < d; rowAbove++ { + if m[rowAbove][d] != 0 { + scale := m[rowAbove][d] + for c := 0; c < columns; c++ { + m[rowAbove][c] ^= galMultiply(scale, m[d][c]) + } + + } + } + } + return nil +} + +// Create a Vandermonde matrix, which is guaranteed to have the +// property that any subset of rows that forms a square matrix +// is invertible. +func vandermonde(rows, cols int) (matrix, error) { + result, err := newMatrix(rows, cols) + if err != nil { + return nil, err + } + for r, row := range result { + for c := range row { + result[r][c] = galExp(byte(r), c) + } + } + return result, nil +} diff --git a/vendor/github.com/klauspost/reedsolomon/options.go b/vendor/github.com/klauspost/reedsolomon/options.go new file mode 100644 index 0000000..e8e3c46 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/options.go @@ -0,0 +1,111 @@ +package reedsolomon + +import ( + "runtime" + + "github.com/klauspost/cpuid" +) + +// Option allows to override processing parameters. +type Option func(*options) + +type options struct { + maxGoroutines int + minSplitSize int + useAVX2, useSSSE3, useSSE2 bool + usePAR1Matrix bool + useCauchy bool + shardSize int +} + +var defaultOptions = options{ + maxGoroutines: 384, + minSplitSize: 1024, +} + +func init() { + if runtime.GOMAXPROCS(0) <= 1 { + defaultOptions.maxGoroutines = 1 + } + // Detect CPU capabilities. + defaultOptions.useSSSE3 = cpuid.CPU.SSSE3() + defaultOptions.useAVX2 = cpuid.CPU.AVX2() + defaultOptions.useSSE2 = cpuid.CPU.SSE2() +} + +// WithMaxGoroutines is the maximum number of goroutines number for encoding & decoding. +// Jobs will be split into this many parts, unless each goroutine would have to process +// less than minSplitSize bytes (set with WithMinSplitSize). +// For the best speed, keep this well above the GOMAXPROCS number for more fine grained +// scheduling. +// If n <= 0, it is ignored. +func WithMaxGoroutines(n int) Option { + return func(o *options) { + if n > 0 { + o.maxGoroutines = n + } + } +} + +// WithAutoGoroutines will adjust the number of goroutines for optimal speed with a +// specific shard size. +// Send in the shard size you expect to send. Other shard sizes will work, but may not +// run at the optimal speed. +// Overwrites WithMaxGoroutines. +// If shardSize <= 0, it is ignored. +func WithAutoGoroutines(shardSize int) Option { + return func(o *options) { + o.shardSize = shardSize + } +} + +// WithMinSplitSize is the minimum encoding size in bytes per goroutine. +// See WithMaxGoroutines on how jobs are split. +// If n <= 0, it is ignored. +func WithMinSplitSize(n int) Option { + return func(o *options) { + if n > 0 { + o.minSplitSize = n + } + } +} + +func withSSE3(enabled bool) Option { + return func(o *options) { + o.useSSSE3 = enabled + } +} + +func withAVX2(enabled bool) Option { + return func(o *options) { + o.useAVX2 = enabled + } +} + +func withSSE2(enabled bool) Option { + return func(o *options) { + o.useSSE2 = enabled + } +} + +// WithPAR1Matrix causes the encoder to build the matrix how PARv1 +// does. Note that the method they use is buggy, and may lead to cases +// where recovery is impossible, even if there are enough parity +// shards. +func WithPAR1Matrix() Option { + return func(o *options) { + o.usePAR1Matrix = true + o.useCauchy = false + } +} + +// WithCauchyMatrix will make the encoder build a Cauchy style matrix. +// The output of this is not compatible with the standard output. +// A Cauchy matrix is faster to generate. This does not affect data throughput, +// but will result in slightly faster start-up time. +func WithCauchyMatrix() Option { + return func(o *options) { + o.useCauchy = true + o.usePAR1Matrix = false + } +} diff --git a/vendor/github.com/klauspost/reedsolomon/reedsolomon.go b/vendor/github.com/klauspost/reedsolomon/reedsolomon.go new file mode 100644 index 0000000..213d0b4 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/reedsolomon.go @@ -0,0 +1,884 @@ +/** + * Reed-Solomon Coding over 8-bit values. + * + * Copyright 2015, Klaus Post + * Copyright 2015, Backblaze, Inc. + */ + +// Package reedsolomon enables Erasure Coding in Go +// +// For usage and examples, see https://github.com/klauspost/reedsolomon +// +package reedsolomon + +import ( + "bytes" + "errors" + "io" + "runtime" + "sync" + + "github.com/klauspost/cpuid" +) + +// Encoder is an interface to encode Reed-Salomon parity sets for your data. +type Encoder interface { + // Encodes parity for a set of data shards. + // Input is 'shards' containing data shards followed by parity shards. + // The number of shards must match the number given to New(). + // Each shard is a byte array, and they must all be the same size. + // The parity shards will always be overwritten and the data shards + // will remain the same, so it is safe for you to read from the + // data shards while this is running. + Encode(shards [][]byte) error + + // Verify returns true if the parity shards contain correct data. + // The data is the same format as Encode. No data is modified, so + // you are allowed to read from data while this is running. + Verify(shards [][]byte) (bool, error) + + // Reconstruct will recreate the missing shards if possible. + // + // Given a list of shards, some of which contain data, fills in the + // ones that don't have data. + // + // The length of the array must be equal to the total number of shards. + // You indicate that a shard is missing by setting it to nil or zero-length. + // If a shard is zero-length but has sufficient capacity, that memory will + // be used, otherwise a new []byte will be allocated. + // + // If there are too few shards to reconstruct the missing + // ones, ErrTooFewShards will be returned. + // + // The reconstructed shard set is complete, but integrity is not verified. + // Use the Verify function to check if data set is ok. + Reconstruct(shards [][]byte) error + + // ReconstructData will recreate any missing data shards, if possible. + // + // Given a list of shards, some of which contain data, fills in the + // data shards that don't have data. + // + // The length of the array must be equal to Shards. + // You indicate that a shard is missing by setting it to nil or zero-length. + // If a shard is zero-length but has sufficient capacity, that memory will + // be used, otherwise a new []byte will be allocated. + // + // If there are too few shards to reconstruct the missing + // ones, ErrTooFewShards will be returned. + // + // As the reconstructed shard set may contain missing parity shards, + // calling the Verify function is likely to fail. + ReconstructData(shards [][]byte) error + + // Update parity is use for change a few data shards and update it's parity. + // Input 'newDatashards' containing data shards changed. + // Input 'shards' containing old data shards (if data shard not changed, it can be nil) and old parity shards. + // new parity shards will in shards[DataShards:] + // Update is very useful if DataShards much larger than ParityShards and changed data shards is few. It will + // faster than Encode and not need read all data shards to encode. + Update(shards [][]byte, newDatashards [][]byte) error + + // Split a data slice into the number of shards given to the encoder, + // and create empty parity shards. + // + // The data will be split into equally sized shards. + // If the data size isn't dividable by the number of shards, + // the last shard will contain extra zeros. + // + // There must be at least 1 byte otherwise ErrShortData will be + // returned. + // + // The data will not be copied, except for the last shard, so you + // should not modify the data of the input slice afterwards. + Split(data []byte) ([][]byte, error) + + // Join the shards and write the data segment to dst. + // + // Only the data shards are considered. + // You must supply the exact output size you want. + // If there are to few shards given, ErrTooFewShards will be returned. + // If the total data size is less than outSize, ErrShortData will be returned. + Join(dst io.Writer, shards [][]byte, outSize int) error +} + +// reedSolomon contains a matrix for a specific +// distribution of datashards and parity shards. +// Construct if using New() +type reedSolomon struct { + DataShards int // Number of data shards, should not be modified. + ParityShards int // Number of parity shards, should not be modified. + Shards int // Total number of shards. Calculated, and should not be modified. + m matrix + tree inversionTree + parity [][]byte + o options +} + +// ErrInvShardNum will be returned by New, if you attempt to create +// an Encoder where either data or parity shards is zero or less. +var ErrInvShardNum = errors.New("cannot create Encoder with zero or less data/parity shards") + +// ErrMaxShardNum will be returned by New, if you attempt to create an +// Encoder where data and parity shards are bigger than the order of +// GF(2^8). +var ErrMaxShardNum = errors.New("cannot create Encoder with more than 256 data+parity shards") + +// buildMatrix creates the matrix to use for encoding, given the +// number of data shards and the number of total shards. +// +// The top square of the matrix is guaranteed to be an identity +// matrix, which means that the data shards are unchanged after +// encoding. +func buildMatrix(dataShards, totalShards int) (matrix, error) { + // Start with a Vandermonde matrix. This matrix would work, + // in theory, but doesn't have the property that the data + // shards are unchanged after encoding. + vm, err := vandermonde(totalShards, dataShards) + if err != nil { + return nil, err + } + + // Multiply by the inverse of the top square of the matrix. + // This will make the top square be the identity matrix, but + // preserve the property that any square subset of rows is + // invertible. + top, err := vm.SubMatrix(0, 0, dataShards, dataShards) + if err != nil { + return nil, err + } + + topInv, err := top.Invert() + if err != nil { + return nil, err + } + + return vm.Multiply(topInv) +} + +// buildMatrixPAR1 creates the matrix to use for encoding according to +// the PARv1 spec, given the number of data shards and the number of +// total shards. Note that the method they use is buggy, and may lead +// to cases where recovery is impossible, even if there are enough +// parity shards. +// +// The top square of the matrix is guaranteed to be an identity +// matrix, which means that the data shards are unchanged after +// encoding. +func buildMatrixPAR1(dataShards, totalShards int) (matrix, error) { + result, err := newMatrix(totalShards, dataShards) + if err != nil { + return nil, err + } + + for r, row := range result { + // The top portion of the matrix is the identity + // matrix, and the bottom is a transposed Vandermonde + // matrix starting at 1 instead of 0. + if r < dataShards { + result[r][r] = 1 + } else { + for c := range row { + result[r][c] = galExp(byte(c+1), r-dataShards) + } + } + } + return result, nil +} + +func buildMatrixCauchy(dataShards, totalShards int) (matrix, error) { + result, err := newMatrix(totalShards, dataShards) + if err != nil { + return nil, err + } + + for r, row := range result { + // The top portion of the matrix is the identity + // matrix, and the bottom is a transposed Cauchy matrix. + if r < dataShards { + result[r][r] = 1 + } else { + for c := range row { + result[r][c] = invTable[(byte(r ^ c))] + } + } + } + return result, nil +} + +// New creates a new encoder and initializes it to +// the number of data shards and parity shards that +// you want to use. You can reuse this encoder. +// Note that the maximum number of total shards is 256. +// If no options are supplied, default options are used. +func New(dataShards, parityShards int, opts ...Option) (Encoder, error) { + r := reedSolomon{ + DataShards: dataShards, + ParityShards: parityShards, + Shards: dataShards + parityShards, + o: defaultOptions, + } + + for _, opt := range opts { + opt(&r.o) + } + if dataShards <= 0 || parityShards <= 0 { + return nil, ErrInvShardNum + } + + if dataShards+parityShards > 256 { + return nil, ErrMaxShardNum + } + + var err error + switch { + case r.o.useCauchy: + r.m, err = buildMatrixCauchy(dataShards, r.Shards) + case r.o.usePAR1Matrix: + r.m, err = buildMatrixPAR1(dataShards, r.Shards) + default: + r.m, err = buildMatrix(dataShards, r.Shards) + } + if err != nil { + return nil, err + } + if r.o.shardSize > 0 { + cacheSize := cpuid.CPU.Cache.L2 + if cacheSize <= 0 { + // Set to 128K if undetectable. + cacheSize = 128 << 10 + } + p := runtime.NumCPU() + + // 1 input + parity must fit in cache, and we add one more to be safer. + shards := 1 + parityShards + g := (r.o.shardSize * shards) / (cacheSize - (cacheSize >> 4)) + + if cpuid.CPU.ThreadsPerCore > 1 { + // If multiple threads per core, make sure they don't contend for cache. + g *= cpuid.CPU.ThreadsPerCore + } + g *= 2 + if g < p { + g = p + } + + // Have g be multiple of p + g += p - 1 + g -= g % p + + r.o.maxGoroutines = g + } + + // Inverted matrices are cached in a tree keyed by the indices + // of the invalid rows of the data to reconstruct. + // The inversion root node will have the identity matrix as + // its inversion matrix because it implies there are no errors + // with the original data. + r.tree = newInversionTree(dataShards, parityShards) + + r.parity = make([][]byte, parityShards) + for i := range r.parity { + r.parity[i] = r.m[dataShards+i] + } + + return &r, err +} + +// ErrTooFewShards is returned if too few shards where given to +// Encode/Verify/Reconstruct/Update. It will also be returned from Reconstruct +// if there were too few shards to reconstruct the missing data. +var ErrTooFewShards = errors.New("too few shards given") + +// Encodes parity for a set of data shards. +// An array 'shards' containing data shards followed by parity shards. +// The number of shards must match the number given to New. +// Each shard is a byte array, and they must all be the same size. +// The parity shards will always be overwritten and the data shards +// will remain the same. +func (r reedSolomon) Encode(shards [][]byte) error { + if len(shards) != r.Shards { + return ErrTooFewShards + } + + err := checkShards(shards, false) + if err != nil { + return err + } + + // Get the slice of output buffers. + output := shards[r.DataShards:] + + // Do the coding. + r.codeSomeShards(r.parity, shards[0:r.DataShards], output, r.ParityShards, len(shards[0])) + return nil +} + +// ErrInvalidInput is returned if invalid input parameter of Update. +var ErrInvalidInput = errors.New("invalid input") + +func (r reedSolomon) Update(shards [][]byte, newDatashards [][]byte) error { + if len(shards) != r.Shards { + return ErrTooFewShards + } + + if len(newDatashards) != r.DataShards { + return ErrTooFewShards + } + + err := checkShards(shards, true) + if err != nil { + return err + } + + err = checkShards(newDatashards, true) + if err != nil { + return err + } + + for i := range newDatashards { + if newDatashards[i] != nil && shards[i] == nil { + return ErrInvalidInput + } + } + for _, p := range shards[r.DataShards:] { + if p == nil { + return ErrInvalidInput + } + } + + shardSize := shardSize(shards) + + // Get the slice of output buffers. + output := shards[r.DataShards:] + + // Do the coding. + r.updateParityShards(r.parity, shards[0:r.DataShards], newDatashards[0:r.DataShards], output, r.ParityShards, shardSize) + return nil +} + +func (r reedSolomon) updateParityShards(matrixRows, oldinputs, newinputs, outputs [][]byte, outputCount, byteCount int) { + if r.o.maxGoroutines > 1 && byteCount > r.o.minSplitSize { + r.updateParityShardsP(matrixRows, oldinputs, newinputs, outputs, outputCount, byteCount) + return + } + + for c := 0; c < r.DataShards; c++ { + in := newinputs[c] + if in == nil { + continue + } + oldin := oldinputs[c] + // oldinputs data will be change + sliceXor(in, oldin, r.o.useSSE2) + for iRow := 0; iRow < outputCount; iRow++ { + galMulSliceXor(matrixRows[iRow][c], oldin, outputs[iRow], r.o.useSSSE3, r.o.useAVX2) + } + } +} + +func (r reedSolomon) updateParityShardsP(matrixRows, oldinputs, newinputs, outputs [][]byte, outputCount, byteCount int) { + var wg sync.WaitGroup + do := byteCount / r.o.maxGoroutines + if do < r.o.minSplitSize { + do = r.o.minSplitSize + } + start := 0 + for start < byteCount { + if start+do > byteCount { + do = byteCount - start + } + wg.Add(1) + go func(start, stop int) { + for c := 0; c < r.DataShards; c++ { + in := newinputs[c] + if in == nil { + continue + } + oldin := oldinputs[c] + // oldinputs data will be change + sliceXor(in[start:stop], oldin[start:stop], r.o.useSSE2) + for iRow := 0; iRow < outputCount; iRow++ { + galMulSliceXor(matrixRows[iRow][c], oldin[start:stop], outputs[iRow][start:stop], r.o.useSSSE3, r.o.useAVX2) + } + } + wg.Done() + }(start, start+do) + start += do + } + wg.Wait() +} + +// Verify returns true if the parity shards contain the right data. +// The data is the same format as Encode. No data is modified. +func (r reedSolomon) Verify(shards [][]byte) (bool, error) { + if len(shards) != r.Shards { + return false, ErrTooFewShards + } + err := checkShards(shards, false) + if err != nil { + return false, err + } + + // Slice of buffers being checked. + toCheck := shards[r.DataShards:] + + // Do the checking. + return r.checkSomeShards(r.parity, shards[0:r.DataShards], toCheck, r.ParityShards, len(shards[0])), nil +} + +// Multiplies a subset of rows from a coding matrix by a full set of +// input shards to produce some output shards. +// 'matrixRows' is The rows from the matrix to use. +// 'inputs' An array of byte arrays, each of which is one input shard. +// The number of inputs used is determined by the length of each matrix row. +// outputs Byte arrays where the computed shards are stored. +// The number of outputs computed, and the +// number of matrix rows used, is determined by +// outputCount, which is the number of outputs to compute. +func (r reedSolomon) codeSomeShards(matrixRows, inputs, outputs [][]byte, outputCount, byteCount int) { + if r.o.maxGoroutines > 1 && byteCount > r.o.minSplitSize { + r.codeSomeShardsP(matrixRows, inputs, outputs, outputCount, byteCount) + return + } + for c := 0; c < r.DataShards; c++ { + in := inputs[c] + for iRow := 0; iRow < outputCount; iRow++ { + if c == 0 { + galMulSlice(matrixRows[iRow][c], in, outputs[iRow], r.o.useSSSE3, r.o.useAVX2) + } else { + galMulSliceXor(matrixRows[iRow][c], in, outputs[iRow], r.o.useSSSE3, r.o.useAVX2) + } + } + } +} + +// Perform the same as codeSomeShards, but split the workload into +// several goroutines. +func (r reedSolomon) codeSomeShardsP(matrixRows, inputs, outputs [][]byte, outputCount, byteCount int) { + var wg sync.WaitGroup + do := byteCount / r.o.maxGoroutines + if do < r.o.minSplitSize { + do = r.o.minSplitSize + } + // Make sizes divisible by 16 + do = (do + 15) & (^15) + start := 0 + for start < byteCount { + if start+do > byteCount { + do = byteCount - start + } + wg.Add(1) + go func(start, stop int) { + for c := 0; c < r.DataShards; c++ { + in := inputs[c] + for iRow := 0; iRow < outputCount; iRow++ { + if c == 0 { + galMulSlice(matrixRows[iRow][c], in[start:stop], outputs[iRow][start:stop], r.o.useSSSE3, r.o.useAVX2) + } else { + galMulSliceXor(matrixRows[iRow][c], in[start:stop], outputs[iRow][start:stop], r.o.useSSSE3, r.o.useAVX2) + } + } + } + wg.Done() + }(start, start+do) + start += do + } + wg.Wait() +} + +// checkSomeShards is mostly the same as codeSomeShards, +// except this will check values and return +// as soon as a difference is found. +func (r reedSolomon) checkSomeShards(matrixRows, inputs, toCheck [][]byte, outputCount, byteCount int) bool { + if r.o.maxGoroutines > 1 && byteCount > r.o.minSplitSize { + return r.checkSomeShardsP(matrixRows, inputs, toCheck, outputCount, byteCount) + } + outputs := make([][]byte, len(toCheck)) + for i := range outputs { + outputs[i] = make([]byte, byteCount) + } + for c := 0; c < r.DataShards; c++ { + in := inputs[c] + for iRow := 0; iRow < outputCount; iRow++ { + galMulSliceXor(matrixRows[iRow][c], in, outputs[iRow], r.o.useSSSE3, r.o.useAVX2) + } + } + + for i, calc := range outputs { + if !bytes.Equal(calc, toCheck[i]) { + return false + } + } + return true +} + +func (r reedSolomon) checkSomeShardsP(matrixRows, inputs, toCheck [][]byte, outputCount, byteCount int) bool { + same := true + var mu sync.RWMutex // For above + + var wg sync.WaitGroup + do := byteCount / r.o.maxGoroutines + if do < r.o.minSplitSize { + do = r.o.minSplitSize + } + // Make sizes divisible by 16 + do = (do + 15) & (^15) + start := 0 + for start < byteCount { + if start+do > byteCount { + do = byteCount - start + } + wg.Add(1) + go func(start, do int) { + defer wg.Done() + outputs := make([][]byte, len(toCheck)) + for i := range outputs { + outputs[i] = make([]byte, do) + } + for c := 0; c < r.DataShards; c++ { + mu.RLock() + if !same { + mu.RUnlock() + return + } + mu.RUnlock() + in := inputs[c][start : start+do] + for iRow := 0; iRow < outputCount; iRow++ { + galMulSliceXor(matrixRows[iRow][c], in, outputs[iRow], r.o.useSSSE3, r.o.useAVX2) + } + } + + for i, calc := range outputs { + if !bytes.Equal(calc, toCheck[i][start:start+do]) { + mu.Lock() + same = false + mu.Unlock() + return + } + } + }(start, do) + start += do + } + wg.Wait() + return same +} + +// ErrShardNoData will be returned if there are no shards, +// or if the length of all shards is zero. +var ErrShardNoData = errors.New("no shard data") + +// ErrShardSize is returned if shard length isn't the same for all +// shards. +var ErrShardSize = errors.New("shard sizes do not match") + +// checkShards will check if shards are the same size +// or 0, if allowed. An error is returned if this fails. +// An error is also returned if all shards are size 0. +func checkShards(shards [][]byte, nilok bool) error { + size := shardSize(shards) + if size == 0 { + return ErrShardNoData + } + for _, shard := range shards { + if len(shard) != size { + if len(shard) != 0 || !nilok { + return ErrShardSize + } + } + } + return nil +} + +// shardSize return the size of a single shard. +// The first non-zero size is returned, +// or 0 if all shards are size 0. +func shardSize(shards [][]byte) int { + for _, shard := range shards { + if len(shard) != 0 { + return len(shard) + } + } + return 0 +} + +// Reconstruct will recreate the missing shards, if possible. +// +// Given a list of shards, some of which contain data, fills in the +// ones that don't have data. +// +// The length of the array must be equal to Shards. +// You indicate that a shard is missing by setting it to nil or zero-length. +// If a shard is zero-length but has sufficient capacity, that memory will +// be used, otherwise a new []byte will be allocated. +// +// If there are too few shards to reconstruct the missing +// ones, ErrTooFewShards will be returned. +// +// The reconstructed shard set is complete, but integrity is not verified. +// Use the Verify function to check if data set is ok. +func (r reedSolomon) Reconstruct(shards [][]byte) error { + return r.reconstruct(shards, false) +} + +// ReconstructData will recreate any missing data shards, if possible. +// +// Given a list of shards, some of which contain data, fills in the +// data shards that don't have data. +// +// The length of the array must be equal to Shards. +// You indicate that a shard is missing by setting it to nil or zero-length. +// If a shard is zero-length but has sufficient capacity, that memory will +// be used, otherwise a new []byte will be allocated. +// +// If there are too few shards to reconstruct the missing +// ones, ErrTooFewShards will be returned. +// +// As the reconstructed shard set may contain missing parity shards, +// calling the Verify function is likely to fail. +func (r reedSolomon) ReconstructData(shards [][]byte) error { + return r.reconstruct(shards, true) +} + +// reconstruct will recreate the missing data shards, and unless +// dataOnly is true, also the missing parity shards +// +// The length of the array must be equal to Shards. +// You indicate that a shard is missing by setting it to nil. +// +// If there are too few shards to reconstruct the missing +// ones, ErrTooFewShards will be returned. +func (r reedSolomon) reconstruct(shards [][]byte, dataOnly bool) error { + if len(shards) != r.Shards { + return ErrTooFewShards + } + // Check arguments. + err := checkShards(shards, true) + if err != nil { + return err + } + + shardSize := shardSize(shards) + + // Quick check: are all of the shards present? If so, there's + // nothing to do. + numberPresent := 0 + for i := 0; i < r.Shards; i++ { + if len(shards[i]) != 0 { + numberPresent++ + } + } + if numberPresent == r.Shards { + // Cool. All of the shards data data. We don't + // need to do anything. + return nil + } + + // More complete sanity check + if numberPresent < r.DataShards { + return ErrTooFewShards + } + + // Pull out an array holding just the shards that + // correspond to the rows of the submatrix. These shards + // will be the input to the decoding process that re-creates + // the missing data shards. + // + // Also, create an array of indices of the valid rows we do have + // and the invalid rows we don't have up until we have enough valid rows. + subShards := make([][]byte, r.DataShards) + validIndices := make([]int, r.DataShards) + invalidIndices := make([]int, 0) + subMatrixRow := 0 + for matrixRow := 0; matrixRow < r.Shards && subMatrixRow < r.DataShards; matrixRow++ { + if len(shards[matrixRow]) != 0 { + subShards[subMatrixRow] = shards[matrixRow] + validIndices[subMatrixRow] = matrixRow + subMatrixRow++ + } else { + invalidIndices = append(invalidIndices, matrixRow) + } + } + + // Attempt to get the cached inverted matrix out of the tree + // based on the indices of the invalid rows. + dataDecodeMatrix := r.tree.GetInvertedMatrix(invalidIndices) + + // If the inverted matrix isn't cached in the tree yet we must + // construct it ourselves and insert it into the tree for the + // future. In this way the inversion tree is lazily loaded. + if dataDecodeMatrix == nil { + // Pull out the rows of the matrix that correspond to the + // shards that we have and build a square matrix. This + // matrix could be used to generate the shards that we have + // from the original data. + subMatrix, _ := newMatrix(r.DataShards, r.DataShards) + for subMatrixRow, validIndex := range validIndices { + for c := 0; c < r.DataShards; c++ { + subMatrix[subMatrixRow][c] = r.m[validIndex][c] + } + } + // Invert the matrix, so we can go from the encoded shards + // back to the original data. Then pull out the row that + // generates the shard that we want to decode. Note that + // since this matrix maps back to the original data, it can + // be used to create a data shard, but not a parity shard. + dataDecodeMatrix, err = subMatrix.Invert() + if err != nil { + return err + } + + // Cache the inverted matrix in the tree for future use keyed on the + // indices of the invalid rows. + err = r.tree.InsertInvertedMatrix(invalidIndices, dataDecodeMatrix, r.Shards) + if err != nil { + return err + } + } + + // Re-create any data shards that were missing. + // + // The input to the coding is all of the shards we actually + // have, and the output is the missing data shards. The computation + // is done using the special decode matrix we just built. + outputs := make([][]byte, r.ParityShards) + matrixRows := make([][]byte, r.ParityShards) + outputCount := 0 + + for iShard := 0; iShard < r.DataShards; iShard++ { + if len(shards[iShard]) == 0 { + if cap(shards[iShard]) >= shardSize { + shards[iShard] = shards[iShard][0:shardSize] + } else { + shards[iShard] = make([]byte, shardSize) + } + outputs[outputCount] = shards[iShard] + matrixRows[outputCount] = dataDecodeMatrix[iShard] + outputCount++ + } + } + r.codeSomeShards(matrixRows, subShards, outputs[:outputCount], outputCount, shardSize) + + if dataOnly { + // Exit out early if we are only interested in the data shards + return nil + } + + // Now that we have all of the data shards intact, we can + // compute any of the parity that is missing. + // + // The input to the coding is ALL of the data shards, including + // any that we just calculated. The output is whichever of the + // data shards were missing. + outputCount = 0 + for iShard := r.DataShards; iShard < r.Shards; iShard++ { + if len(shards[iShard]) == 0 { + if cap(shards[iShard]) >= shardSize { + shards[iShard] = shards[iShard][0:shardSize] + } else { + shards[iShard] = make([]byte, shardSize) + } + outputs[outputCount] = shards[iShard] + matrixRows[outputCount] = r.parity[iShard-r.DataShards] + outputCount++ + } + } + r.codeSomeShards(matrixRows, shards[:r.DataShards], outputs[:outputCount], outputCount, shardSize) + return nil +} + +// ErrShortData will be returned by Split(), if there isn't enough data +// to fill the number of shards. +var ErrShortData = errors.New("not enough data to fill the number of requested shards") + +// Split a data slice into the number of shards given to the encoder, +// and create empty parity shards if necessary. +// +// The data will be split into equally sized shards. +// If the data size isn't divisible by the number of shards, +// the last shard will contain extra zeros. +// +// There must be at least 1 byte otherwise ErrShortData will be +// returned. +// +// The data will not be copied, except for the last shard, so you +// should not modify the data of the input slice afterwards. +func (r reedSolomon) Split(data []byte) ([][]byte, error) { + if len(data) == 0 { + return nil, ErrShortData + } + // Calculate number of bytes per data shard. + perShard := (len(data) + r.DataShards - 1) / r.DataShards + + if cap(data) > len(data) { + data = data[:cap(data)] + } + + // Only allocate memory if necessary + if len(data) < (r.Shards * perShard) { + // Pad data to r.Shards*perShard. + padding := make([]byte, (r.Shards*perShard)-len(data)) + data = append(data, padding...) + } + + // Split into equal-length shards. + dst := make([][]byte, r.Shards) + for i := range dst { + dst[i] = data[:perShard] + data = data[perShard:] + } + + return dst, nil +} + +// ErrReconstructRequired is returned if too few data shards are intact and a +// reconstruction is required before you can successfully join the shards. +var ErrReconstructRequired = errors.New("reconstruction required as one or more required data shards are nil") + +// Join the shards and write the data segment to dst. +// +// Only the data shards are considered. +// You must supply the exact output size you want. +// +// If there are to few shards given, ErrTooFewShards will be returned. +// If the total data size is less than outSize, ErrShortData will be returned. +// If one or more required data shards are nil, ErrReconstructRequired will be returned. +func (r reedSolomon) Join(dst io.Writer, shards [][]byte, outSize int) error { + // Do we have enough shards? + if len(shards) < r.DataShards { + return ErrTooFewShards + } + shards = shards[:r.DataShards] + + // Do we have enough data? + size := 0 + for _, shard := range shards { + if shard == nil { + return ErrReconstructRequired + } + size += len(shard) + + // Do we have enough data already? + if size >= outSize { + break + } + } + if size < outSize { + return ErrShortData + } + + // Copy data to dst + write := outSize + for _, shard := range shards { + if write < len(shard) { + _, err := dst.Write(shard[:write]) + return err + } + n, err := dst.Write(shard) + if err != nil { + return err + } + write -= n + } + return nil +} diff --git a/vendor/github.com/klauspost/reedsolomon/streaming.go b/vendor/github.com/klauspost/reedsolomon/streaming.go new file mode 100644 index 0000000..9e55d73 --- /dev/null +++ b/vendor/github.com/klauspost/reedsolomon/streaming.go @@ -0,0 +1,584 @@ +/** + * Reed-Solomon Coding over 8-bit values. + * + * Copyright 2015, Klaus Post + * Copyright 2015, Backblaze, Inc. + */ + +package reedsolomon + +import ( + "bytes" + "errors" + "fmt" + "io" + "sync" +) + +// StreamEncoder is an interface to encode Reed-Salomon parity sets for your data. +// It provides a fully streaming interface, and processes data in blocks of up to 4MB. +// +// For small shard sizes, 10MB and below, it is recommended to use the in-memory interface, +// since the streaming interface has a start up overhead. +// +// For all operations, no readers and writers should not assume any order/size of +// individual reads/writes. +// +// For usage examples, see "stream-encoder.go" and "streamdecoder.go" in the examples +// folder. +type StreamEncoder interface { + // Encodes parity shards for a set of data shards. + // + // Input is 'shards' containing readers for data shards followed by parity shards + // io.Writer. + // + // The number of shards must match the number given to NewStream(). + // + // Each reader must supply the same number of bytes. + // + // The parity shards will be written to the writer. + // The number of bytes written will match the input size. + // + // If a data stream returns an error, a StreamReadError type error + // will be returned. If a parity writer returns an error, a + // StreamWriteError will be returned. + Encode(data []io.Reader, parity []io.Writer) error + + // Verify returns true if the parity shards contain correct data. + // + // The number of shards must match the number total data+parity shards + // given to NewStream(). + // + // Each reader must supply the same number of bytes. + // If a shard stream returns an error, a StreamReadError type error + // will be returned. + Verify(shards []io.Reader) (bool, error) + + // Reconstruct will recreate the missing shards if possible. + // + // Given a list of valid shards (to read) and invalid shards (to write) + // + // You indicate that a shard is missing by setting it to nil in the 'valid' + // slice and at the same time setting a non-nil writer in "fill". + // An index cannot contain both non-nil 'valid' and 'fill' entry. + // If both are provided 'ErrReconstructMismatch' is returned. + // + // If there are too few shards to reconstruct the missing + // ones, ErrTooFewShards will be returned. + // + // The reconstructed shard set is complete, but integrity is not verified. + // Use the Verify function to check if data set is ok. + Reconstruct(valid []io.Reader, fill []io.Writer) error + + // Split a an input stream into the number of shards given to the encoder. + // + // The data will be split into equally sized shards. + // If the data size isn't dividable by the number of shards, + // the last shard will contain extra zeros. + // + // You must supply the total size of your input. + // 'ErrShortData' will be returned if it is unable to retrieve the + // number of bytes indicated. + Split(data io.Reader, dst []io.Writer, size int64) (err error) + + // Join the shards and write the data segment to dst. + // + // Only the data shards are considered. + // + // You must supply the exact output size you want. + // If there are to few shards given, ErrTooFewShards will be returned. + // If the total data size is less than outSize, ErrShortData will be returned. + Join(dst io.Writer, shards []io.Reader, outSize int64) error +} + +// StreamReadError is returned when a read error is encountered +// that relates to a supplied stream. +// This will allow you to find out which reader has failed. +type StreamReadError struct { + Err error // The error + Stream int // The stream number on which the error occurred +} + +// Error returns the error as a string +func (s StreamReadError) Error() string { + return fmt.Sprintf("error reading stream %d: %s", s.Stream, s.Err) +} + +// String returns the error as a string +func (s StreamReadError) String() string { + return s.Error() +} + +// StreamWriteError is returned when a write error is encountered +// that relates to a supplied stream. This will allow you to +// find out which reader has failed. +type StreamWriteError struct { + Err error // The error + Stream int // The stream number on which the error occurred +} + +// Error returns the error as a string +func (s StreamWriteError) Error() string { + return fmt.Sprintf("error writing stream %d: %s", s.Stream, s.Err) +} + +// String returns the error as a string +func (s StreamWriteError) String() string { + return s.Error() +} + +// rsStream contains a matrix for a specific +// distribution of datashards and parity shards. +// Construct if using NewStream() +type rsStream struct { + r *reedSolomon + bs int // Block size + // Shard reader + readShards func(dst [][]byte, in []io.Reader) error + // Shard writer + writeShards func(out []io.Writer, in [][]byte) error + creads bool + cwrites bool +} + +// NewStream creates a new encoder and initializes it to +// the number of data shards and parity shards that +// you want to use. You can reuse this encoder. +// Note that the maximum number of data shards is 256. +func NewStream(dataShards, parityShards int, o ...Option) (StreamEncoder, error) { + enc, err := New(dataShards, parityShards, o...) + if err != nil { + return nil, err + } + rs := enc.(*reedSolomon) + r := rsStream{r: rs, bs: 4 << 20} + r.readShards = readShards + r.writeShards = writeShards + return &r, err +} + +// NewStreamC creates a new encoder and initializes it to +// the number of data shards and parity shards given. +// +// This functions as 'NewStream', but allows you to enable CONCURRENT reads and writes. +func NewStreamC(dataShards, parityShards int, conReads, conWrites bool, o ...Option) (StreamEncoder, error) { + enc, err := New(dataShards, parityShards, o...) + if err != nil { + return nil, err + } + rs := enc.(*reedSolomon) + r := rsStream{r: rs, bs: 4 << 20} + r.readShards = readShards + r.writeShards = writeShards + if conReads { + r.readShards = cReadShards + } + if conWrites { + r.writeShards = cWriteShards + } + return &r, err +} + +func createSlice(n, length int) [][]byte { + out := make([][]byte, n) + for i := range out { + out[i] = make([]byte, length) + } + return out +} + +// Encodes parity shards for a set of data shards. +// +// Input is 'shards' containing readers for data shards followed by parity shards +// io.Writer. +// +// The number of shards must match the number given to NewStream(). +// +// Each reader must supply the same number of bytes. +// +// The parity shards will be written to the writer. +// The number of bytes written will match the input size. +// +// If a data stream returns an error, a StreamReadError type error +// will be returned. If a parity writer returns an error, a +// StreamWriteError will be returned. +func (r rsStream) Encode(data []io.Reader, parity []io.Writer) error { + if len(data) != r.r.DataShards { + return ErrTooFewShards + } + + if len(parity) != r.r.ParityShards { + return ErrTooFewShards + } + + all := createSlice(r.r.Shards, r.bs) + in := all[:r.r.DataShards] + out := all[r.r.DataShards:] + read := 0 + + for { + err := r.readShards(in, data) + switch err { + case nil: + case io.EOF: + if read == 0 { + return ErrShardNoData + } + return nil + default: + return err + } + out = trimShards(out, shardSize(in)) + read += shardSize(in) + err = r.r.Encode(all) + if err != nil { + return err + } + err = r.writeShards(parity, out) + if err != nil { + return err + } + } +} + +// Trim the shards so they are all the same size +func trimShards(in [][]byte, size int) [][]byte { + for i := range in { + if in[i] != nil { + in[i] = in[i][0:size] + } + if len(in[i]) < size { + in[i] = nil + } + } + return in +} + +func readShards(dst [][]byte, in []io.Reader) error { + if len(in) != len(dst) { + panic("internal error: in and dst size do not match") + } + size := -1 + for i := range in { + if in[i] == nil { + dst[i] = nil + continue + } + n, err := io.ReadFull(in[i], dst[i]) + // The error is EOF only if no bytes were read. + // If an EOF happens after reading some but not all the bytes, + // ReadFull returns ErrUnexpectedEOF. + switch err { + case io.ErrUnexpectedEOF, io.EOF: + if size < 0 { + size = n + } else if n != size { + // Shard sizes must match. + return ErrShardSize + } + dst[i] = dst[i][0:n] + case nil: + continue + default: + return StreamReadError{Err: err, Stream: i} + } + } + if size == 0 { + return io.EOF + } + return nil +} + +func writeShards(out []io.Writer, in [][]byte) error { + if len(out) != len(in) { + panic("internal error: in and out size do not match") + } + for i := range in { + if out[i] == nil { + continue + } + n, err := out[i].Write(in[i]) + if err != nil { + return StreamWriteError{Err: err, Stream: i} + } + // + if n != len(in[i]) { + return StreamWriteError{Err: io.ErrShortWrite, Stream: i} + } + } + return nil +} + +type readResult struct { + n int + size int + err error +} + +// cReadShards reads shards concurrently +func cReadShards(dst [][]byte, in []io.Reader) error { + if len(in) != len(dst) { + panic("internal error: in and dst size do not match") + } + var wg sync.WaitGroup + wg.Add(len(in)) + res := make(chan readResult, len(in)) + for i := range in { + if in[i] == nil { + dst[i] = nil + wg.Done() + continue + } + go func(i int) { + defer wg.Done() + n, err := io.ReadFull(in[i], dst[i]) + // The error is EOF only if no bytes were read. + // If an EOF happens after reading some but not all the bytes, + // ReadFull returns ErrUnexpectedEOF. + res <- readResult{size: n, err: err, n: i} + + }(i) + } + wg.Wait() + close(res) + size := -1 + for r := range res { + switch r.err { + case io.ErrUnexpectedEOF, io.EOF: + if size < 0 { + size = r.size + } else if r.size != size { + // Shard sizes must match. + return ErrShardSize + } + dst[r.n] = dst[r.n][0:r.size] + case nil: + default: + return StreamReadError{Err: r.err, Stream: r.n} + } + } + if size == 0 { + return io.EOF + } + return nil +} + +// cWriteShards writes shards concurrently +func cWriteShards(out []io.Writer, in [][]byte) error { + if len(out) != len(in) { + panic("internal error: in and out size do not match") + } + var errs = make(chan error, len(out)) + var wg sync.WaitGroup + wg.Add(len(out)) + for i := range in { + go func(i int) { + defer wg.Done() + if out[i] == nil { + errs <- nil + return + } + n, err := out[i].Write(in[i]) + if err != nil { + errs <- StreamWriteError{Err: err, Stream: i} + return + } + if n != len(in[i]) { + errs <- StreamWriteError{Err: io.ErrShortWrite, Stream: i} + } + }(i) + } + wg.Wait() + close(errs) + for err := range errs { + if err != nil { + return err + } + } + + return nil +} + +// Verify returns true if the parity shards contain correct data. +// +// The number of shards must match the number total data+parity shards +// given to NewStream(). +// +// Each reader must supply the same number of bytes. +// If a shard stream returns an error, a StreamReadError type error +// will be returned. +func (r rsStream) Verify(shards []io.Reader) (bool, error) { + if len(shards) != r.r.Shards { + return false, ErrTooFewShards + } + + read := 0 + all := createSlice(r.r.Shards, r.bs) + for { + err := r.readShards(all, shards) + if err == io.EOF { + if read == 0 { + return false, ErrShardNoData + } + return true, nil + } + if err != nil { + return false, err + } + read += shardSize(all) + ok, err := r.r.Verify(all) + if !ok || err != nil { + return ok, err + } + } +} + +// ErrReconstructMismatch is returned by the StreamEncoder, if you supply +// "valid" and "fill" streams on the same index. +// Therefore it is impossible to see if you consider the shard valid +// or would like to have it reconstructed. +var ErrReconstructMismatch = errors.New("valid shards and fill shards are mutually exclusive") + +// Reconstruct will recreate the missing shards if possible. +// +// Given a list of valid shards (to read) and invalid shards (to write) +// +// You indicate that a shard is missing by setting it to nil in the 'valid' +// slice and at the same time setting a non-nil writer in "fill". +// An index cannot contain both non-nil 'valid' and 'fill' entry. +// +// If there are too few shards to reconstruct the missing +// ones, ErrTooFewShards will be returned. +// +// The reconstructed shard set is complete when explicitly asked for all missing shards. +// However its integrity is not automatically verified. +// Use the Verify function to check in case the data set is complete. +func (r rsStream) Reconstruct(valid []io.Reader, fill []io.Writer) error { + if len(valid) != r.r.Shards { + return ErrTooFewShards + } + if len(fill) != r.r.Shards { + return ErrTooFewShards + } + + all := createSlice(r.r.Shards, r.bs) + reconDataOnly := true + for i := range valid { + if valid[i] != nil && fill[i] != nil { + return ErrReconstructMismatch + } + if i >= r.r.DataShards && fill[i] != nil { + reconDataOnly = false + } + } + + read := 0 + for { + err := r.readShards(all, valid) + if err == io.EOF { + if read == 0 { + return ErrShardNoData + } + return nil + } + if err != nil { + return err + } + read += shardSize(all) + all = trimShards(all, shardSize(all)) + + if reconDataOnly { + err = r.r.ReconstructData(all) // just reconstruct missing data shards + } else { + err = r.r.Reconstruct(all) // reconstruct all missing shards + } + if err != nil { + return err + } + err = r.writeShards(fill, all) + if err != nil { + return err + } + } +} + +// Join the shards and write the data segment to dst. +// +// Only the data shards are considered. +// +// You must supply the exact output size you want. +// If there are to few shards given, ErrTooFewShards will be returned. +// If the total data size is less than outSize, ErrShortData will be returned. +func (r rsStream) Join(dst io.Writer, shards []io.Reader, outSize int64) error { + // Do we have enough shards? + if len(shards) < r.r.DataShards { + return ErrTooFewShards + } + + // Trim off parity shards if any + shards = shards[:r.r.DataShards] + for i := range shards { + if shards[i] == nil { + return StreamReadError{Err: ErrShardNoData, Stream: i} + } + } + // Join all shards + src := io.MultiReader(shards...) + + // Copy data to dst + n, err := io.CopyN(dst, src, outSize) + if err == io.EOF { + return ErrShortData + } + if err != nil { + return err + } + if n != outSize { + return ErrShortData + } + return nil +} + +// Split a an input stream into the number of shards given to the encoder. +// +// The data will be split into equally sized shards. +// If the data size isn't dividable by the number of shards, +// the last shard will contain extra zeros. +// +// You must supply the total size of your input. +// 'ErrShortData' will be returned if it is unable to retrieve the +// number of bytes indicated. +func (r rsStream) Split(data io.Reader, dst []io.Writer, size int64) error { + if size == 0 { + return ErrShortData + } + if len(dst) != r.r.DataShards { + return ErrInvShardNum + } + + for i := range dst { + if dst[i] == nil { + return StreamWriteError{Err: ErrShardNoData, Stream: i} + } + } + + // Calculate number of bytes per shard. + perShard := (size + int64(r.r.DataShards) - 1) / int64(r.r.DataShards) + + // Pad data to r.Shards*perShard. + padding := make([]byte, (int64(r.r.Shards)*perShard)-size) + data = io.MultiReader(data, bytes.NewBuffer(padding)) + + // Split into equal-length shards and copy. + for i := range dst { + n, err := io.CopyN(dst[i], data, perShard) + if err != io.EOF && err != nil { + return err + } + if n != perShard { + return ErrShortData + } + } + + return nil +} diff --git a/vendor/github.com/pierrec/lz4/LICENSE b/vendor/github.com/pierrec/lz4/LICENSE new file mode 100644 index 0000000..bd899d8 --- /dev/null +++ b/vendor/github.com/pierrec/lz4/LICENSE @@ -0,0 +1,28 @@ +Copyright (c) 2015, Pierre Curto +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + +* Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + +* Neither the name of xxHash nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + diff --git a/vendor/github.com/pierrec/lz4/README.md b/vendor/github.com/pierrec/lz4/README.md new file mode 100644 index 0000000..e71ebd5 --- /dev/null +++ b/vendor/github.com/pierrec/lz4/README.md @@ -0,0 +1,24 @@ +[![godoc](https://godoc.org/github.com/pierrec/lz4?status.png)](https://godoc.org/github.com/pierrec/lz4) + +# lz4 +LZ4 compression and decompression in pure Go. + +## Usage + +```go +import "github.com/pierrec/lz4/v2" +``` + +## Description +Package lz4 implements reading and writing lz4 compressed data (a frame), +as specified in http://fastcompression.blogspot.fr/2013/04/lz4-streaming-format-final.html. + +This package is **compatible with the LZ4 frame format** although the block level compression +and decompression functions are exposed and are fully compatible with the lz4 block format +definition, they are low level and should not be used directly. + +For a complete description of an lz4 compressed block, see: +http://fastcompression.blogspot.fr/2011/05/lz4-explained.html + +See https://github.com/Cyan4973/lz4 for the reference C implementation. + diff --git a/vendor/github.com/pierrec/lz4/block.go b/vendor/github.com/pierrec/lz4/block.go new file mode 100644 index 0000000..00b1111 --- /dev/null +++ b/vendor/github.com/pierrec/lz4/block.go @@ -0,0 +1,397 @@ +package lz4 + +import ( + "encoding/binary" + "errors" +) + +var ( + // ErrInvalidSourceShortBuffer is returned by UncompressBlock or CompressBLock when a compressed + // block is corrupted or the destination buffer is not large enough for the uncompressed data. + ErrInvalidSourceShortBuffer = errors.New("lz4: invalid source or destination buffer too short") + // ErrInvalid is returned when reading an invalid LZ4 archive. + ErrInvalid = errors.New("lz4: bad magic number") +) + +// blockHash hashes 4 bytes into a value < winSize. +func blockHash(x uint32) uint32 { + const hasher uint32 = 2654435761 // Knuth multiplicative hash. + return x * hasher >> hashShift +} + +// CompressBlockBound returns the maximum size of a given buffer of size n, when not compressible. +func CompressBlockBound(n int) int { + return n + n/255 + 16 +} + +// UncompressBlock uncompresses the source buffer into the destination one, +// and returns the uncompressed size. +// +// The destination buffer must be sized appropriately. +// +// An error is returned if the source data is invalid or the destination buffer is too small. +func UncompressBlock(src, dst []byte) (si int, err error) { + defer func() { + // It is now faster to let the runtime panic and recover on out of bound slice access + // than checking indices as we go along. + if recover() != nil { + err = ErrInvalidSourceShortBuffer + } + }() + sn := len(src) + if sn == 0 { + return 0, nil + } + var di int + + for { + // Literals and match lengths (token). + b := int(src[si]) + si++ + + // Literals. + if lLen := b >> 4; lLen > 0 { + if lLen == 0xF { + for src[si] == 0xFF { + lLen += 0xFF + si++ + } + lLen += int(src[si]) + si++ + } + i := si + si += lLen + di += copy(dst[di:], src[i:si]) + + if si >= sn { + return di, nil + } + } + + si++ + _ = src[si] // Bound check elimination. + offset := int(src[si-1]) | int(src[si])<<8 + si++ + + // Match. + mLen := b & 0xF + if mLen == 0xF { + for src[si] == 0xFF { + mLen += 0xFF + si++ + } + mLen += int(src[si]) + si++ + } + mLen += minMatch + + // Copy the match. + i := di - offset + if offset > 0 && mLen >= offset { + // Efficiently copy the match dst[di-offset:di] into the dst slice. + bytesToCopy := offset * (mLen / offset) + expanded := dst[i:] + for n := offset; n <= bytesToCopy+offset; n *= 2 { + copy(expanded[n:], expanded[:n]) + } + di += bytesToCopy + mLen -= bytesToCopy + } + di += copy(dst[di:], dst[i:i+mLen]) + } +} + +// CompressBlock compresses the source buffer into the destination one. +// This is the fast version of LZ4 compression and also the default one. +// The size of hashTable must be at least 64Kb. +// +// The size of the compressed data is returned. If it is 0 and no error, then the data is incompressible. +// +// An error is returned if the destination buffer is too small. +func CompressBlock(src, dst []byte, hashTable []int) (di int, err error) { + defer func() { + if recover() != nil { + err = ErrInvalidSourceShortBuffer + } + }() + + sn, dn := len(src)-mfLimit, len(dst) + if sn <= 0 || dn == 0 { + return 0, nil + } + var si int + + // Fast scan strategy: the hash table only stores the last 4 bytes sequences. + // const accInit = 1 << skipStrength + + anchor := si // Position of the current literals. + // acc := accInit // Variable step: improves performance on non-compressible data. + + for si < sn { + // Hash the next 4 bytes (sequence)... + match := binary.LittleEndian.Uint32(src[si:]) + h := blockHash(match) + + ref := hashTable[h] + hashTable[h] = si + if ref >= sn { // Invalid reference (dirty hashtable). + si++ + continue + } + offset := si - ref + if offset <= 0 || offset >= winSize || // Out of window. + match != binary.LittleEndian.Uint32(src[ref:]) { // Hash collision on different matches. + // si += acc >> skipStrength + // acc++ + si++ + continue + } + + // Match found. + // acc = accInit + lLen := si - anchor // Literal length. + + // Encode match length part 1. + si += minMatch + mLen := si // Match length has minMatch already. + // Find the longest match, first looking by batches of 8 bytes. + for si < sn && binary.LittleEndian.Uint64(src[si:]) == binary.LittleEndian.Uint64(src[si-offset:]) { + si += 8 + } + // Then byte by byte. + for si < sn && src[si] == src[si-offset] { + si++ + } + + mLen = si - mLen + if mLen < 0xF { + dst[di] = byte(mLen) + } else { + dst[di] = 0xF + } + + // Encode literals length. + if lLen < 0xF { + dst[di] |= byte(lLen << 4) + } else { + dst[di] |= 0xF0 + di++ + l := lLen - 0xF + for ; l >= 0xFF; l -= 0xFF { + dst[di] = 0xFF + di++ + } + dst[di] = byte(l) + } + di++ + + // Literals. + copy(dst[di:], src[anchor:anchor+lLen]) + di += lLen + 2 + anchor = si + + // Encode offset. + _ = dst[di] // Bound check elimination. + dst[di-2], dst[di-1] = byte(offset), byte(offset>>8) + + // Encode match length part 2. + if mLen >= 0xF { + for mLen -= 0xF; mLen >= 0xFF; mLen -= 0xFF { + dst[di] = 0xFF + di++ + } + dst[di] = byte(mLen) + di++ + } + } + + if anchor == 0 { + // Incompressible. + return 0, nil + } + + // Last literals. + lLen := len(src) - anchor + if lLen < 0xF { + dst[di] = byte(lLen << 4) + } else { + dst[di] = 0xF0 + di++ + for lLen -= 0xF; lLen >= 0xFF; lLen -= 0xFF { + dst[di] = 0xFF + di++ + } + dst[di] = byte(lLen) + } + di++ + + // Write the last literals. + if di >= anchor { + // Incompressible. + return 0, nil + } + di += copy(dst[di:], src[anchor:]) + return di, nil +} + +// CompressBlockHC compresses the source buffer src into the destination dst +// with max search depth (use 0 or negative value for no max). +// +// CompressBlockHC compression ratio is better than CompressBlock but it is also slower. +// +// The size of the compressed data is returned. If it is 0 and no error, then the data is not compressible. +// +// An error is returned if the destination buffer is too small. +func CompressBlockHC(src, dst []byte, depth int) (di int, err error) { + defer func() { + if recover() != nil { + err = ErrInvalidSourceShortBuffer + } + }() + + sn, dn := len(src)-mfLimit, len(dst) + if sn <= 0 || dn == 0 { + return 0, nil + } + var si int + + // hashTable: stores the last position found for a given hash + // chaingTable: stores previous positions for a given hash + var hashTable, chainTable [winSize]int + + if depth <= 0 { + depth = winSize + } + + anchor := si + for si < sn { + // Hash the next 4 bytes (sequence). + match := binary.LittleEndian.Uint32(src[si:]) + h := blockHash(match) + + // Follow the chain until out of window and give the longest match. + mLen := 0 + offset := 0 + for next, try := hashTable[h], depth; try > 0 && next > 0 && si-next < winSize; next = chainTable[next&winMask] { + // The first (mLen==0) or next byte (mLen>=minMatch) at current match length + // must match to improve on the match length. + if src[next+mLen] != src[si+mLen] { + continue + } + ml := 0 + // Compare the current position with a previous with the same hash. + for ml < sn-si && binary.LittleEndian.Uint64(src[next+ml:]) == binary.LittleEndian.Uint64(src[si+ml:]) { + ml += 8 + } + for ml < sn-si && src[next+ml] == src[si+ml] { + ml++ + } + if ml < minMatch || ml <= mLen { + // Match too small ( winStart { + winStart = ws + } + for si, ml := winStart, si+mLen; si < ml; { + match >>= 8 + match |= uint32(src[si+3]) << 24 + h := blockHash(match) + chainTable[si&winMask] = hashTable[h] + hashTable[h] = si + si++ + } + + lLen := si - anchor + si += mLen + mLen -= minMatch // Match length does not include minMatch. + + if mLen < 0xF { + dst[di] = byte(mLen) + } else { + dst[di] = 0xF + } + + // Encode literals length. + if lLen < 0xF { + dst[di] |= byte(lLen << 4) + } else { + dst[di] |= 0xF0 + di++ + l := lLen - 0xF + for ; l >= 0xFF; l -= 0xFF { + dst[di] = 0xFF + di++ + } + dst[di] = byte(l) + } + di++ + + // Literals. + copy(dst[di:], src[anchor:anchor+lLen]) + di += lLen + anchor = si + + // Encode offset. + di += 2 + dst[di-2], dst[di-1] = byte(offset), byte(offset>>8) + + // Encode match length part 2. + if mLen >= 0xF { + for mLen -= 0xF; mLen >= 0xFF; mLen -= 0xFF { + dst[di] = 0xFF + di++ + } + dst[di] = byte(mLen) + di++ + } + } + + if anchor == 0 { + // Incompressible. + return 0, nil + } + + // Last literals. + lLen := len(src) - anchor + if lLen < 0xF { + dst[di] = byte(lLen << 4) + } else { + dst[di] = 0xF0 + di++ + lLen -= 0xF + for ; lLen >= 0xFF; lLen -= 0xFF { + dst[di] = 0xFF + di++ + } + dst[di] = byte(lLen) + } + di++ + + // Write the last literals. + if di >= anchor { + // Incompressible. + return 0, nil + } + di += copy(dst[di:], src[anchor:]) + return di, nil +} diff --git a/vendor/github.com/pierrec/lz4/debug.go b/vendor/github.com/pierrec/lz4/debug.go new file mode 100644 index 0000000..bc5e78d --- /dev/null +++ b/vendor/github.com/pierrec/lz4/debug.go @@ -0,0 +1,23 @@ +// +build lz4debug + +package lz4 + +import ( + "fmt" + "os" + "path/filepath" + "runtime" +) + +const debugFlag = true + +func debug(args ...interface{}) { + _, file, line, _ := runtime.Caller(1) + file = filepath.Base(file) + + f := fmt.Sprintf("LZ4: %s:%d %s", file, line, args[0]) + if f[len(f)-1] != '\n' { + f += "\n" + } + fmt.Fprintf(os.Stderr, f, args[1:]...) +} diff --git a/vendor/github.com/pierrec/lz4/debug_stub.go b/vendor/github.com/pierrec/lz4/debug_stub.go new file mode 100644 index 0000000..44211ad --- /dev/null +++ b/vendor/github.com/pierrec/lz4/debug_stub.go @@ -0,0 +1,7 @@ +// +build !lz4debug + +package lz4 + +const debugFlag = false + +func debug(args ...interface{}) {} diff --git a/vendor/github.com/pierrec/lz4/go.mod b/vendor/github.com/pierrec/lz4/go.mod new file mode 100644 index 0000000..f9f570a --- /dev/null +++ b/vendor/github.com/pierrec/lz4/go.mod @@ -0,0 +1,3 @@ +module github.com/pierrec/lz4 + +require github.com/pkg/profile v1.2.1 diff --git a/vendor/github.com/pierrec/lz4/go.sum b/vendor/github.com/pierrec/lz4/go.sum new file mode 100644 index 0000000..6ca7598 --- /dev/null +++ b/vendor/github.com/pierrec/lz4/go.sum @@ -0,0 +1,2 @@ +github.com/pkg/profile v1.2.1 h1:F++O52m40owAmADcojzM+9gyjmMOY/T4oYJkgFDH8RE= +github.com/pkg/profile v1.2.1/go.mod h1:hJw3o1OdXxsrSjjVksARp5W95eeEaEfptyVZyv6JUPA= diff --git a/vendor/github.com/pierrec/lz4/internal/xxh32/xxh32zero.go b/vendor/github.com/pierrec/lz4/internal/xxh32/xxh32zero.go new file mode 100644 index 0000000..850a6fd --- /dev/null +++ b/vendor/github.com/pierrec/lz4/internal/xxh32/xxh32zero.go @@ -0,0 +1,222 @@ +// Package xxh32 implements the very fast XXH hashing algorithm (32 bits version). +// (https://github.com/Cyan4973/XXH/) +package xxh32 + +import ( + "encoding/binary" +) + +const ( + prime32_1 uint32 = 2654435761 + prime32_2 uint32 = 2246822519 + prime32_3 uint32 = 3266489917 + prime32_4 uint32 = 668265263 + prime32_5 uint32 = 374761393 + + prime32_1plus2 uint32 = 606290984 + prime32_minus1 uint32 = 1640531535 +) + +// XXHZero represents an xxhash32 object with seed 0. +type XXHZero struct { + v1 uint32 + v2 uint32 + v3 uint32 + v4 uint32 + totalLen uint64 + buf [16]byte + bufused int +} + +// Sum appends the current hash to b and returns the resulting slice. +// It does not change the underlying hash state. +func (xxh XXHZero) Sum(b []byte) []byte { + h32 := xxh.Sum32() + return append(b, byte(h32), byte(h32>>8), byte(h32>>16), byte(h32>>24)) +} + +// Reset resets the Hash to its initial state. +func (xxh *XXHZero) Reset() { + xxh.v1 = prime32_1plus2 + xxh.v2 = prime32_2 + xxh.v3 = 0 + xxh.v4 = prime32_minus1 + xxh.totalLen = 0 + xxh.bufused = 0 +} + +// Size returns the number of bytes returned by Sum(). +func (xxh *XXHZero) Size() int { + return 4 +} + +// BlockSize gives the minimum number of bytes accepted by Write(). +func (xxh *XXHZero) BlockSize() int { + return 1 +} + +// Write adds input bytes to the Hash. +// It never returns an error. +func (xxh *XXHZero) Write(input []byte) (int, error) { + if xxh.totalLen == 0 { + xxh.Reset() + } + n := len(input) + m := xxh.bufused + + xxh.totalLen += uint64(n) + + r := len(xxh.buf) - m + if n < r { + copy(xxh.buf[m:], input) + xxh.bufused += len(input) + return n, nil + } + + p := 0 + // Causes compiler to work directly from registers instead of stack: + v1, v2, v3, v4 := xxh.v1, xxh.v2, xxh.v3, xxh.v4 + if m > 0 { + // some data left from previous update + copy(xxh.buf[xxh.bufused:], input[:r]) + xxh.bufused += len(input) - r + + // fast rotl(13) + buf := xxh.buf[:16] // BCE hint. + v1 = rol13(v1+binary.LittleEndian.Uint32(buf[:])*prime32_2) * prime32_1 + v2 = rol13(v2+binary.LittleEndian.Uint32(buf[4:])*prime32_2) * prime32_1 + v3 = rol13(v3+binary.LittleEndian.Uint32(buf[8:])*prime32_2) * prime32_1 + v4 = rol13(v4+binary.LittleEndian.Uint32(buf[12:])*prime32_2) * prime32_1 + p = r + xxh.bufused = 0 + } + + for n := n - 16; p <= n; p += 16 { + sub := input[p:][:16] //BCE hint for compiler + v1 = rol13(v1+binary.LittleEndian.Uint32(sub[:])*prime32_2) * prime32_1 + v2 = rol13(v2+binary.LittleEndian.Uint32(sub[4:])*prime32_2) * prime32_1 + v3 = rol13(v3+binary.LittleEndian.Uint32(sub[8:])*prime32_2) * prime32_1 + v4 = rol13(v4+binary.LittleEndian.Uint32(sub[12:])*prime32_2) * prime32_1 + } + xxh.v1, xxh.v2, xxh.v3, xxh.v4 = v1, v2, v3, v4 + + copy(xxh.buf[xxh.bufused:], input[p:]) + xxh.bufused += len(input) - p + + return n, nil +} + +// Sum32 returns the 32 bits Hash value. +func (xxh *XXHZero) Sum32() uint32 { + h32 := uint32(xxh.totalLen) + if h32 >= 16 { + h32 += rol1(xxh.v1) + rol7(xxh.v2) + rol12(xxh.v3) + rol18(xxh.v4) + } else { + h32 += prime32_5 + } + + p := 0 + n := xxh.bufused + buf := xxh.buf + for n := n - 4; p <= n; p += 4 { + h32 += binary.LittleEndian.Uint32(buf[p:p+4]) * prime32_3 + h32 = rol17(h32) * prime32_4 + } + for ; p < n; p++ { + h32 += uint32(buf[p]) * prime32_5 + h32 = rol11(h32) * prime32_1 + } + + h32 ^= h32 >> 15 + h32 *= prime32_2 + h32 ^= h32 >> 13 + h32 *= prime32_3 + h32 ^= h32 >> 16 + + return h32 +} + +// ChecksumZero returns the 32bits Hash value. +func ChecksumZero(input []byte) uint32 { + n := len(input) + h32 := uint32(n) + + if n < 16 { + h32 += prime32_5 + } else { + v1 := prime32_1plus2 + v2 := prime32_2 + v3 := uint32(0) + v4 := prime32_minus1 + p := 0 + for n := n - 16; p <= n; p += 16 { + sub := input[p:][:16] //BCE hint for compiler + v1 = rol13(v1+binary.LittleEndian.Uint32(sub[:])*prime32_2) * prime32_1 + v2 = rol13(v2+binary.LittleEndian.Uint32(sub[4:])*prime32_2) * prime32_1 + v3 = rol13(v3+binary.LittleEndian.Uint32(sub[8:])*prime32_2) * prime32_1 + v4 = rol13(v4+binary.LittleEndian.Uint32(sub[12:])*prime32_2) * prime32_1 + } + input = input[p:] + n -= p + h32 += rol1(v1) + rol7(v2) + rol12(v3) + rol18(v4) + } + + p := 0 + for n := n - 4; p <= n; p += 4 { + h32 += binary.LittleEndian.Uint32(input[p:p+4]) * prime32_3 + h32 = rol17(h32) * prime32_4 + } + for p < n { + h32 += uint32(input[p]) * prime32_5 + h32 = rol11(h32) * prime32_1 + p++ + } + + h32 ^= h32 >> 15 + h32 *= prime32_2 + h32 ^= h32 >> 13 + h32 *= prime32_3 + h32 ^= h32 >> 16 + + return h32 +} + +// Uint32Zero hashes x with seed 0. +func Uint32Zero(x uint32) uint32 { + h := prime32_5 + 4 + x*prime32_3 + h = rol17(h) * prime32_4 + h ^= h >> 15 + h *= prime32_2 + h ^= h >> 13 + h *= prime32_3 + h ^= h >> 16 + return h +} + +func rol1(u uint32) uint32 { + return u<<1 | u>>31 +} + +func rol7(u uint32) uint32 { + return u<<7 | u>>25 +} + +func rol11(u uint32) uint32 { + return u<<11 | u>>21 +} + +func rol12(u uint32) uint32 { + return u<<12 | u>>20 +} + +func rol13(u uint32) uint32 { + return u<<13 | u>>19 +} + +func rol17(u uint32) uint32 { + return u<<17 | u>>15 +} + +func rol18(u uint32) uint32 { + return u<<18 | u>>14 +} diff --git a/vendor/github.com/pierrec/lz4/lz4.go b/vendor/github.com/pierrec/lz4/lz4.go new file mode 100644 index 0000000..3580275 --- /dev/null +++ b/vendor/github.com/pierrec/lz4/lz4.go @@ -0,0 +1,68 @@ +// Package lz4 implements reading and writing lz4 compressed data (a frame), +// as specified in http://fastcompression.blogspot.fr/2013/04/lz4-streaming-format-final.html. +// +// Although the block level compression and decompression functions are exposed and are fully compatible +// with the lz4 block format definition, they are low level and should not be used directly. +// For a complete description of an lz4 compressed block, see: +// http://fastcompression.blogspot.fr/2011/05/lz4-explained.html +// +// See https://github.com/Cyan4973/lz4 for the reference C implementation. +// +package lz4 + +const ( + // Extension is the LZ4 frame file name extension + Extension = ".lz4" + // Version is the LZ4 frame format version + Version = 1 + + frameMagic uint32 = 0x184D2204 + frameSkipMagic uint32 = 0x184D2A50 + + // The following constants are used to setup the compression algorithm. + minMatch = 4 // the minimum size of the match sequence size (4 bytes) + winSizeLog = 16 // LZ4 64Kb window size limit + winSize = 1 << winSizeLog + winMask = winSize - 1 // 64Kb window of previous data for dependent blocks + compressedBlockFlag = 1 << 31 + compressedBlockMask = compressedBlockFlag - 1 + + // hashLog determines the size of the hash table used to quickly find a previous match position. + // Its value influences the compression speed and memory usage, the lower the faster, + // but at the expense of the compression ratio. + // 16 seems to be the best compromise. + hashLog = 16 + hashTableSize = 1 << hashLog + hashShift = uint((minMatch * 8) - hashLog) + + mfLimit = 8 + minMatch // The last match cannot start within the last 12 bytes. + skipStrength = 6 // variable step for fast scan +) + +// map the block max size id with its value in bytes: 64Kb, 256Kb, 1Mb and 4Mb. +var ( + bsMapID = map[byte]int{4: 64 << 10, 5: 256 << 10, 6: 1 << 20, 7: 4 << 20} + bsMapValue = make(map[int]byte, len(bsMapID)) +) + +// Reversed. +func init() { + for i, v := range bsMapID { + bsMapValue[v] = i + } +} + +// Header describes the various flags that can be set on a Writer or obtained from a Reader. +// The default values match those of the LZ4 frame format definition +// (http://fastcompression.blogspot.com/2013/04/lz4-streaming-format-final.html). +// +// NB. in a Reader, in case of concatenated frames, the Header values may change between Read() calls. +// It is the caller responsibility to check them if necessary. +type Header struct { + BlockChecksum bool // Compressed blocks checksum flag. + NoChecksum bool // Frame checksum flag. + BlockMaxSize int // Size of the uncompressed data block (one of [64KB, 256KB, 1MB, 4MB]). Default=4MB. + Size uint64 // Frame total size. It is _not_ computed by the Writer. + CompressionLevel int // Compression level (higher is better, use 0 for fastest compression). + done bool // Header processed flag (Read or Write and checked). +} diff --git a/vendor/github.com/pierrec/lz4/lz4_go1.10.go b/vendor/github.com/pierrec/lz4/lz4_go1.10.go new file mode 100644 index 0000000..9a0fb00 --- /dev/null +++ b/vendor/github.com/pierrec/lz4/lz4_go1.10.go @@ -0,0 +1,29 @@ +//+build go1.10 + +package lz4 + +import ( + "fmt" + "strings" +) + +func (h Header) String() string { + var s strings.Builder + + s.WriteString(fmt.Sprintf("%T{", h)) + if h.BlockChecksum { + s.WriteString("BlockChecksum: true ") + } + if h.NoChecksum { + s.WriteString("NoChecksum: true ") + } + if bs := h.BlockMaxSize; bs != 0 && bs != 4<<20 { + s.WriteString(fmt.Sprintf("BlockMaxSize: %d ", bs)) + } + if l := h.CompressionLevel; l != 0 { + s.WriteString(fmt.Sprintf("CompressionLevel: %d ", l)) + } + s.WriteByte('}') + + return s.String() +} diff --git a/vendor/github.com/pierrec/lz4/lz4_notgo1.10.go b/vendor/github.com/pierrec/lz4/lz4_notgo1.10.go new file mode 100644 index 0000000..12c761a --- /dev/null +++ b/vendor/github.com/pierrec/lz4/lz4_notgo1.10.go @@ -0,0 +1,29 @@ +//+build !go1.10 + +package lz4 + +import ( + "bytes" + "fmt" +) + +func (h Header) String() string { + var s bytes.Buffer + + s.WriteString(fmt.Sprintf("%T{", h)) + if h.BlockChecksum { + s.WriteString("BlockChecksum: true ") + } + if h.NoChecksum { + s.WriteString("NoChecksum: true ") + } + if bs := h.BlockMaxSize; bs != 0 && bs != 4<<20 { + s.WriteString(fmt.Sprintf("BlockMaxSize: %d ", bs)) + } + if l := h.CompressionLevel; l != 0 { + s.WriteString(fmt.Sprintf("CompressionLevel: %d ", l)) + } + s.WriteByte('}') + + return s.String() +} diff --git a/vendor/github.com/pierrec/lz4/reader.go b/vendor/github.com/pierrec/lz4/reader.go new file mode 100644 index 0000000..f08db47 --- /dev/null +++ b/vendor/github.com/pierrec/lz4/reader.go @@ -0,0 +1,295 @@ +package lz4 + +import ( + "encoding/binary" + "fmt" + "io" + "io/ioutil" + + "github.com/pierrec/lz4/internal/xxh32" +) + +// Reader implements the LZ4 frame decoder. +// The Header is set after the first call to Read(). +// The Header may change between Read() calls in case of concatenated frames. +type Reader struct { + Header + + buf [8]byte // Scrap buffer. + pos int64 // Current position in src. + src io.Reader // Source. + zdata []byte // Compressed data. + data []byte // Uncompressed data. + idx int // Index of unread bytes into data. + checksum xxh32.XXHZero // Frame hash. +} + +// NewReader returns a new LZ4 frame decoder. +// No access to the underlying io.Reader is performed. +func NewReader(src io.Reader) *Reader { + r := &Reader{src: src} + return r +} + +// readHeader checks the frame magic number and parses the frame descriptoz. +// Skippable frames are supported even as a first frame although the LZ4 +// specifications recommends skippable frames not to be used as first frames. +func (z *Reader) readHeader(first bool) error { + defer z.checksum.Reset() + + buf := z.buf[:] + for { + magic, err := z.readUint32() + if err != nil { + z.pos += 4 + if !first && err == io.ErrUnexpectedEOF { + return io.EOF + } + return err + } + if magic == frameMagic { + break + } + if magic>>8 != frameSkipMagic>>8 { + return ErrInvalid + } + skipSize, err := z.readUint32() + if err != nil { + return err + } + z.pos += 4 + m, err := io.CopyN(ioutil.Discard, z.src, int64(skipSize)) + if err != nil { + return err + } + z.pos += m + } + + // Header. + if _, err := io.ReadFull(z.src, buf[:2]); err != nil { + return err + } + z.pos += 8 + + b := buf[0] + if v := b >> 6; v != Version { + return fmt.Errorf("lz4: invalid version: got %d; expected %d", v, Version) + } + if b>>5&1 == 0 { + return fmt.Errorf("lz4: block dependency not supported") + } + z.BlockChecksum = b>>4&1 > 0 + frameSize := b>>3&1 > 0 + z.NoChecksum = b>>2&1 == 0 + + bmsID := buf[1] >> 4 & 0x7 + bSize, ok := bsMapID[bmsID] + if !ok { + return fmt.Errorf("lz4: invalid block max size ID: %d", bmsID) + } + z.BlockMaxSize = bSize + + // Allocate the compressed/uncompressed buffers. + // The compressed buffer cannot exceed the uncompressed one. + if n := 2 * bSize; cap(z.zdata) < n { + z.zdata = make([]byte, n, n) + } + if debugFlag { + debug("header block max size id=%d size=%d", bmsID, bSize) + } + z.zdata = z.zdata[:bSize] + z.data = z.zdata[:cap(z.zdata)][bSize:] + z.idx = len(z.data) + + z.checksum.Write(buf[0:2]) + + if frameSize { + buf := buf[:8] + if _, err := io.ReadFull(z.src, buf); err != nil { + return err + } + z.Size = binary.LittleEndian.Uint64(buf) + z.pos += 8 + z.checksum.Write(buf) + } + + // Header checksum. + if _, err := io.ReadFull(z.src, buf[:1]); err != nil { + return err + } + z.pos++ + if h := byte(z.checksum.Sum32() >> 8 & 0xFF); h != buf[0] { + return fmt.Errorf("lz4: invalid header checksum: got %x; expected %x", buf[0], h) + } + + z.Header.done = true + if debugFlag { + debug("header read: %v", z.Header) + } + + return nil +} + +// Read decompresses data from the underlying source into the supplied buffer. +// +// Since there can be multiple streams concatenated, Header values may +// change between calls to Read(). If that is the case, no data is actually read from +// the underlying io.Reader, to allow for potential input buffer resizing. +func (z *Reader) Read(buf []byte) (int, error) { + if debugFlag { + debug("Read buf len=%d", len(buf)) + } + if !z.Header.done { + if err := z.readHeader(true); err != nil { + return 0, err + } + if debugFlag { + debug("header read OK compressed buffer %d / %d uncompressed buffer %d : %d index=%d", + len(z.zdata), cap(z.zdata), len(z.data), cap(z.data), z.idx) + } + } + + if len(buf) == 0 { + return 0, nil + } + + if z.idx == len(z.data) { + // No data ready for reading, process the next block. + if debugFlag { + debug("reading block from writer") + } + // Block length: 0 = end of frame, highest bit set: uncompressed. + bLen, err := z.readUint32() + if err != nil { + return 0, err + } + z.pos += 4 + + if bLen == 0 { + // End of frame reached. + if !z.NoChecksum { + // Validate the frame checksum. + checksum, err := z.readUint32() + if err != nil { + return 0, err + } + if debugFlag { + debug("frame checksum got=%x / want=%x", z.checksum.Sum32(), checksum) + } + z.pos += 4 + if h := z.checksum.Sum32(); checksum != h { + return 0, fmt.Errorf("lz4: invalid frame checksum: got %x; expected %x", h, checksum) + } + } + + // Get ready for the next concatenated frame and keep the position. + pos := z.pos + z.Reset(z.src) + z.pos = pos + + // Since multiple frames can be concatenated, check for more. + return 0, z.readHeader(false) + } + + if debugFlag { + debug("raw block size %d", bLen) + } + if bLen&compressedBlockFlag > 0 { + // Uncompressed block. + bLen &= compressedBlockMask + if debugFlag { + debug("uncompressed block size %d", bLen) + } + if int(bLen) > cap(z.data) { + return 0, fmt.Errorf("lz4: invalid block size: %d", bLen) + } + z.data = z.data[:bLen] + if _, err := io.ReadFull(z.src, z.data); err != nil { + return 0, err + } + z.pos += int64(bLen) + + if z.BlockChecksum { + checksum, err := z.readUint32() + if err != nil { + return 0, err + } + z.pos += 4 + + if h := xxh32.ChecksumZero(z.data); h != checksum { + return 0, fmt.Errorf("lz4: invalid block checksum: got %x; expected %x", h, checksum) + } + } + + } else { + // Compressed block. + if debugFlag { + debug("compressed block size %d", bLen) + } + if int(bLen) > cap(z.data) { + return 0, fmt.Errorf("lz4: invalid block size: %d", bLen) + } + zdata := z.zdata[:bLen] + if _, err := io.ReadFull(z.src, zdata); err != nil { + return 0, err + } + z.pos += int64(bLen) + + if z.BlockChecksum { + checksum, err := z.readUint32() + if err != nil { + return 0, err + } + z.pos += 4 + + if h := xxh32.ChecksumZero(zdata); h != checksum { + return 0, fmt.Errorf("lz4: invalid block checksum: got %x; expected %x", h, checksum) + } + } + + n, err := UncompressBlock(zdata, z.data) + if err != nil { + return 0, err + } + z.data = z.data[:n] + } + + if !z.NoChecksum { + z.checksum.Write(z.data) + if debugFlag { + debug("current frame checksum %x", z.checksum.Sum32()) + } + } + z.idx = 0 + } + + n := copy(buf, z.data[z.idx:]) + z.idx += n + if debugFlag { + debug("copied %d bytes to input", n) + } + + return n, nil +} + +// Reset discards the Reader's state and makes it equivalent to the +// result of its original state from NewReader, but reading from r instead. +// This permits reusing a Reader rather than allocating a new one. +func (z *Reader) Reset(r io.Reader) { + z.Header = Header{} + z.pos = 0 + z.src = r + z.zdata = z.zdata[:0] + z.data = z.data[:0] + z.idx = 0 + z.checksum.Reset() +} + +// readUint32 reads an uint32 into the supplied buffer. +// The idea is to make use of the already allocated buffers avoiding additional allocations. +func (z *Reader) readUint32() (uint32, error) { + buf := z.buf[:4] + _, err := io.ReadFull(z.src, buf) + x := binary.LittleEndian.Uint32(buf) + return x, err +} diff --git a/vendor/github.com/pierrec/lz4/writer.go b/vendor/github.com/pierrec/lz4/writer.go new file mode 100644 index 0000000..0120438 --- /dev/null +++ b/vendor/github.com/pierrec/lz4/writer.go @@ -0,0 +1,267 @@ +package lz4 + +import ( + "encoding/binary" + "fmt" + "io" + + "github.com/pierrec/lz4/internal/xxh32" +) + +// Writer implements the LZ4 frame encoder. +type Writer struct { + Header + + buf [19]byte // magic number(4) + header(flags(2)+[Size(8)+DictID(4)]+checksum(1)) does not exceed 19 bytes + dst io.Writer // Destination. + checksum xxh32.XXHZero // Frame checksum. + zdata []byte // Compressed data. + data []byte // Data to be compressed. + idx int // Index into data. + hashtable [winSize]int // Hash table used in CompressBlock(). +} + +// NewWriter returns a new LZ4 frame encoder. +// No access to the underlying io.Writer is performed. +// The supplied Header is checked at the first Write. +// It is ok to change it before the first Write but then not until a Reset() is performed. +func NewWriter(dst io.Writer) *Writer { + return &Writer{dst: dst} +} + +// writeHeader builds and writes the header (magic+header) to the underlying io.Writer. +func (z *Writer) writeHeader() error { + // Default to 4Mb if BlockMaxSize is not set. + if z.Header.BlockMaxSize == 0 { + z.Header.BlockMaxSize = bsMapID[7] + } + // The only option that needs to be validated. + bSize := z.Header.BlockMaxSize + bSizeID, ok := bsMapValue[bSize] + if !ok { + return fmt.Errorf("lz4: invalid block max size: %d", bSize) + } + // Allocate the compressed/uncompressed buffers. + // The compressed buffer cannot exceed the uncompressed one. + if n := 2 * bSize; cap(z.zdata) < n { + z.zdata = make([]byte, n, n) + } + z.zdata = z.zdata[:bSize] + z.data = z.zdata[:cap(z.zdata)][bSize:] + z.idx = 0 + + // Size is optional. + buf := z.buf[:] + + // Set the fixed size data: magic number, block max size and flags. + binary.LittleEndian.PutUint32(buf[0:], frameMagic) + flg := byte(Version << 6) + flg |= 1 << 5 // No block dependency. + if z.Header.BlockChecksum { + flg |= 1 << 4 + } + if z.Header.Size > 0 { + flg |= 1 << 3 + } + if !z.Header.NoChecksum { + flg |= 1 << 2 + } + buf[4] = flg + buf[5] = bSizeID << 4 + + // Current buffer size: magic(4) + flags(1) + block max size (1). + n := 6 + // Optional items. + if z.Header.Size > 0 { + binary.LittleEndian.PutUint64(buf[n:], z.Header.Size) + n += 8 + } + + // The header checksum includes the flags, block max size and optional Size. + buf[n] = byte(xxh32.ChecksumZero(buf[4:n]) >> 8 & 0xFF) + z.checksum.Reset() + + // Header ready, write it out. + if _, err := z.dst.Write(buf[0 : n+1]); err != nil { + return err + } + z.Header.done = true + if debugFlag { + debug("wrote header %v", z.Header) + } + + return nil +} + +// Write compresses data from the supplied buffer into the underlying io.Writer. +// Write does not return until the data has been written. +func (z *Writer) Write(buf []byte) (int, error) { + if !z.Header.done { + if err := z.writeHeader(); err != nil { + return 0, err + } + } + if debugFlag { + debug("input buffer len=%d index=%d", len(buf), z.idx) + } + + zn := len(z.data) + var n int + for len(buf) > 0 { + if z.idx == 0 && len(buf) >= zn { + // Avoid a copy as there is enough data for a block. + if err := z.compressBlock(buf[:zn]); err != nil { + return n, err + } + n += zn + buf = buf[zn:] + continue + } + // Accumulate the data to be compressed. + m := copy(z.data[z.idx:], buf) + n += m + z.idx += m + buf = buf[m:] + if debugFlag { + debug("%d bytes copied to buf, current index %d", n, z.idx) + } + + if z.idx < len(z.data) { + // Buffer not filled. + if debugFlag { + debug("need more data for compression") + } + return n, nil + } + + // Buffer full. + if err := z.compressBlock(z.data); err != nil { + return n, err + } + z.idx = 0 + } + + return n, nil +} + +// compressBlock compresses a block. +func (z *Writer) compressBlock(data []byte) error { + if !z.NoChecksum { + z.checksum.Write(data) + } + + // The compressed block size cannot exceed the input's. + var zn int + var err error + + if level := z.Header.CompressionLevel; level != 0 { + zn, err = CompressBlockHC(data, z.zdata, level) + } else { + zn, err = CompressBlock(data, z.zdata, z.hashtable[:]) + } + + var zdata []byte + var bLen uint32 + if debugFlag { + debug("block compression %d => %d", len(data), zn) + } + if err == nil && zn > 0 && zn < len(data) { + // Compressible and compressed size smaller than uncompressed: ok! + bLen = uint32(zn) + zdata = z.zdata[:zn] + } else { + // Uncompressed block. + bLen = uint32(len(data)) | compressedBlockFlag + zdata = data + } + if debugFlag { + debug("block compression to be written len=%d data len=%d", bLen, len(zdata)) + } + + // Write the block. + if err := z.writeUint32(bLen); err != nil { + return err + } + if _, err := z.dst.Write(zdata); err != nil { + return err + } + + if z.BlockChecksum { + checksum := xxh32.ChecksumZero(zdata) + if debugFlag { + debug("block checksum %x", checksum) + } + if err := z.writeUint32(checksum); err != nil { + return err + } + } + if debugFlag { + debug("current frame checksum %x", z.checksum.Sum32()) + } + + return nil +} + +// Flush flushes any pending compressed data to the underlying writer. +// Flush does not return until the data has been written. +// If the underlying writer returns an error, Flush returns that error. +func (z *Writer) Flush() error { + if debugFlag { + debug("flush with index %d", z.idx) + } + if z.idx == 0 { + return nil + } + + return z.compressBlock(z.data[:z.idx]) +} + +// Close closes the Writer, flushing any unwritten data to the underlying io.Writer, but does not close the underlying io.Writer. +func (z *Writer) Close() error { + if !z.Header.done { + if err := z.writeHeader(); err != nil { + return err + } + } + + if err := z.Flush(); err != nil { + return err + } + + if debugFlag { + debug("writing last empty block") + } + if err := z.writeUint32(0); err != nil { + return err + } + if !z.NoChecksum { + checksum := z.checksum.Sum32() + if debugFlag { + debug("stream checksum %x", checksum) + } + if err := z.writeUint32(checksum); err != nil { + return err + } + } + return nil +} + +// Reset clears the state of the Writer z such that it is equivalent to its +// initial state from NewWriter, but instead writing to w. +// No access to the underlying io.Writer is performed. +func (z *Writer) Reset(w io.Writer) { + z.Header = Header{} + z.dst = w + z.checksum.Reset() + z.zdata = z.zdata[:0] + z.data = z.data[:0] + z.idx = 0 +} + +// writeUint32 writes a uint32 to the underlying writer. +func (z *Writer) writeUint32(x uint32) error { + buf := z.buf[:4] + binary.LittleEndian.PutUint32(buf, x) + _, err := z.dst.Write(buf) + return err +} diff --git a/vendor/golang.org/x/crypto/LICENSE b/vendor/golang.org/x/crypto/LICENSE new file mode 100644 index 0000000..6a66aea --- /dev/null +++ b/vendor/golang.org/x/crypto/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2009 The Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/golang.org/x/crypto/PATENTS b/vendor/golang.org/x/crypto/PATENTS new file mode 100644 index 0000000..7330990 --- /dev/null +++ b/vendor/golang.org/x/crypto/PATENTS @@ -0,0 +1,22 @@ +Additional IP Rights Grant (Patents) + +"This implementation" means the copyrightable works distributed by +Google as part of the Go project. + +Google hereby grants to You a perpetual, worldwide, non-exclusive, +no-charge, royalty-free, irrevocable (except as stated in this section) +patent license to make, have made, use, offer to sell, sell, import, +transfer and otherwise run, modify and propagate the contents of this +implementation of Go, where such license applies only to those patent +claims, both currently owned or controlled by Google and acquired in +the future, licensable by Google that are necessarily infringed by this +implementation of Go. This grant does not include claims that would be +infringed only as a consequence of further modification of this +implementation. If you or your agent or exclusive licensee institute or +order or agree to the institution of patent litigation against any +entity (including a cross-claim or counterclaim in a lawsuit) alleging +that this implementation of Go or any code incorporated within this +implementation of Go constitutes direct or contributory patent +infringement, or inducement of patent infringement, then any patent +rights granted to you under this License for this implementation of Go +shall terminate as of the date such litigation is filed. diff --git a/vendor/golang.org/x/crypto/cast5/cast5.go b/vendor/golang.org/x/crypto/cast5/cast5.go new file mode 100644 index 0000000..0b4af37 --- /dev/null +++ b/vendor/golang.org/x/crypto/cast5/cast5.go @@ -0,0 +1,526 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package cast5 implements CAST5, as defined in RFC 2144. CAST5 is a common +// OpenPGP cipher. +package cast5 // import "golang.org/x/crypto/cast5" + +import "errors" + +const BlockSize = 8 +const KeySize = 16 + +type Cipher struct { + masking [16]uint32 + rotate [16]uint8 +} + +func NewCipher(key []byte) (c *Cipher, err error) { + if len(key) != KeySize { + return nil, errors.New("CAST5: keys must be 16 bytes") + } + + c = new(Cipher) + c.keySchedule(key) + return +} + +func (c *Cipher) BlockSize() int { + return BlockSize +} + +func (c *Cipher) Encrypt(dst, src []byte) { + l := uint32(src[0])<<24 | uint32(src[1])<<16 | uint32(src[2])<<8 | uint32(src[3]) + r := uint32(src[4])<<24 | uint32(src[5])<<16 | uint32(src[6])<<8 | uint32(src[7]) + + l, r = r, l^f1(r, c.masking[0], c.rotate[0]) + l, r = r, l^f2(r, c.masking[1], c.rotate[1]) + l, r = r, l^f3(r, c.masking[2], c.rotate[2]) + l, r = r, l^f1(r, c.masking[3], c.rotate[3]) + + l, r = r, l^f2(r, c.masking[4], c.rotate[4]) + l, r = r, l^f3(r, c.masking[5], c.rotate[5]) + l, r = r, l^f1(r, c.masking[6], c.rotate[6]) + l, r = r, l^f2(r, c.masking[7], c.rotate[7]) + + l, r = r, l^f3(r, c.masking[8], c.rotate[8]) + l, r = r, l^f1(r, c.masking[9], c.rotate[9]) + l, r = r, l^f2(r, c.masking[10], c.rotate[10]) + l, r = r, l^f3(r, c.masking[11], c.rotate[11]) + + l, r = r, l^f1(r, c.masking[12], c.rotate[12]) + l, r = r, l^f2(r, c.masking[13], c.rotate[13]) + l, r = r, l^f3(r, c.masking[14], c.rotate[14]) + l, r = r, l^f1(r, c.masking[15], c.rotate[15]) + + dst[0] = uint8(r >> 24) + dst[1] = uint8(r >> 16) + dst[2] = uint8(r >> 8) + dst[3] = uint8(r) + dst[4] = uint8(l >> 24) + dst[5] = uint8(l >> 16) + dst[6] = uint8(l >> 8) + dst[7] = uint8(l) +} + +func (c *Cipher) Decrypt(dst, src []byte) { + l := uint32(src[0])<<24 | uint32(src[1])<<16 | uint32(src[2])<<8 | uint32(src[3]) + r := uint32(src[4])<<24 | uint32(src[5])<<16 | uint32(src[6])<<8 | uint32(src[7]) + + l, r = r, l^f1(r, c.masking[15], c.rotate[15]) + l, r = r, l^f3(r, c.masking[14], c.rotate[14]) + l, r = r, l^f2(r, c.masking[13], c.rotate[13]) + l, r = r, l^f1(r, c.masking[12], c.rotate[12]) + + l, r = r, l^f3(r, c.masking[11], c.rotate[11]) + l, r = r, l^f2(r, c.masking[10], c.rotate[10]) + l, r = r, l^f1(r, c.masking[9], c.rotate[9]) + l, r = r, l^f3(r, c.masking[8], c.rotate[8]) + + l, r = r, l^f2(r, c.masking[7], c.rotate[7]) + l, r = r, l^f1(r, c.masking[6], c.rotate[6]) + l, r = r, l^f3(r, c.masking[5], c.rotate[5]) + l, r = r, l^f2(r, c.masking[4], c.rotate[4]) + + l, r = r, l^f1(r, c.masking[3], c.rotate[3]) + l, r = r, l^f3(r, c.masking[2], c.rotate[2]) + l, r = r, l^f2(r, c.masking[1], c.rotate[1]) + l, r = r, l^f1(r, c.masking[0], c.rotate[0]) + + dst[0] = uint8(r >> 24) + dst[1] = uint8(r >> 16) + dst[2] = uint8(r >> 8) + dst[3] = uint8(r) + dst[4] = uint8(l >> 24) + dst[5] = uint8(l >> 16) + dst[6] = uint8(l >> 8) + dst[7] = uint8(l) +} + +type keyScheduleA [4][7]uint8 +type keyScheduleB [4][5]uint8 + +// keyScheduleRound contains the magic values for a round of the key schedule. +// The keyScheduleA deals with the lines like: +// z0z1z2z3 = x0x1x2x3 ^ S5[xD] ^ S6[xF] ^ S7[xC] ^ S8[xE] ^ S7[x8] +// Conceptually, both x and z are in the same array, x first. The first +// element describes which word of this array gets written to and the +// second, which word gets read. So, for the line above, it's "4, 0", because +// it's writing to the first word of z, which, being after x, is word 4, and +// reading from the first word of x: word 0. +// +// Next are the indexes into the S-boxes. Now the array is treated as bytes. So +// "xD" is 0xd. The first byte of z is written as "16 + 0", just to be clear +// that it's z that we're indexing. +// +// keyScheduleB deals with lines like: +// K1 = S5[z8] ^ S6[z9] ^ S7[z7] ^ S8[z6] ^ S5[z2] +// "K1" is ignored because key words are always written in order. So the five +// elements are the S-box indexes. They use the same form as in keyScheduleA, +// above. + +type keyScheduleRound struct{} +type keySchedule []keyScheduleRound + +var schedule = []struct { + a keyScheduleA + b keyScheduleB +}{ + { + keyScheduleA{ + {4, 0, 0xd, 0xf, 0xc, 0xe, 0x8}, + {5, 2, 16 + 0, 16 + 2, 16 + 1, 16 + 3, 0xa}, + {6, 3, 16 + 7, 16 + 6, 16 + 5, 16 + 4, 9}, + {7, 1, 16 + 0xa, 16 + 9, 16 + 0xb, 16 + 8, 0xb}, + }, + keyScheduleB{ + {16 + 8, 16 + 9, 16 + 7, 16 + 6, 16 + 2}, + {16 + 0xa, 16 + 0xb, 16 + 5, 16 + 4, 16 + 6}, + {16 + 0xc, 16 + 0xd, 16 + 3, 16 + 2, 16 + 9}, + {16 + 0xe, 16 + 0xf, 16 + 1, 16 + 0, 16 + 0xc}, + }, + }, + { + keyScheduleA{ + {0, 6, 16 + 5, 16 + 7, 16 + 4, 16 + 6, 16 + 0}, + {1, 4, 0, 2, 1, 3, 16 + 2}, + {2, 5, 7, 6, 5, 4, 16 + 1}, + {3, 7, 0xa, 9, 0xb, 8, 16 + 3}, + }, + keyScheduleB{ + {3, 2, 0xc, 0xd, 8}, + {1, 0, 0xe, 0xf, 0xd}, + {7, 6, 8, 9, 3}, + {5, 4, 0xa, 0xb, 7}, + }, + }, + { + keyScheduleA{ + {4, 0, 0xd, 0xf, 0xc, 0xe, 8}, + {5, 2, 16 + 0, 16 + 2, 16 + 1, 16 + 3, 0xa}, + {6, 3, 16 + 7, 16 + 6, 16 + 5, 16 + 4, 9}, + {7, 1, 16 + 0xa, 16 + 9, 16 + 0xb, 16 + 8, 0xb}, + }, + keyScheduleB{ + {16 + 3, 16 + 2, 16 + 0xc, 16 + 0xd, 16 + 9}, + {16 + 1, 16 + 0, 16 + 0xe, 16 + 0xf, 16 + 0xc}, + {16 + 7, 16 + 6, 16 + 8, 16 + 9, 16 + 2}, + {16 + 5, 16 + 4, 16 + 0xa, 16 + 0xb, 16 + 6}, + }, + }, + { + keyScheduleA{ + {0, 6, 16 + 5, 16 + 7, 16 + 4, 16 + 6, 16 + 0}, + {1, 4, 0, 2, 1, 3, 16 + 2}, + {2, 5, 7, 6, 5, 4, 16 + 1}, + {3, 7, 0xa, 9, 0xb, 8, 16 + 3}, + }, + keyScheduleB{ + {8, 9, 7, 6, 3}, + {0xa, 0xb, 5, 4, 7}, + {0xc, 0xd, 3, 2, 8}, + {0xe, 0xf, 1, 0, 0xd}, + }, + }, +} + +func (c *Cipher) keySchedule(in []byte) { + var t [8]uint32 + var k [32]uint32 + + for i := 0; i < 4; i++ { + j := i * 4 + t[i] = uint32(in[j])<<24 | uint32(in[j+1])<<16 | uint32(in[j+2])<<8 | uint32(in[j+3]) + } + + x := []byte{6, 7, 4, 5} + ki := 0 + + for half := 0; half < 2; half++ { + for _, round := range schedule { + for j := 0; j < 4; j++ { + var a [7]uint8 + copy(a[:], round.a[j][:]) + w := t[a[1]] + w ^= sBox[4][(t[a[2]>>2]>>(24-8*(a[2]&3)))&0xff] + w ^= sBox[5][(t[a[3]>>2]>>(24-8*(a[3]&3)))&0xff] + w ^= sBox[6][(t[a[4]>>2]>>(24-8*(a[4]&3)))&0xff] + w ^= sBox[7][(t[a[5]>>2]>>(24-8*(a[5]&3)))&0xff] + w ^= sBox[x[j]][(t[a[6]>>2]>>(24-8*(a[6]&3)))&0xff] + t[a[0]] = w + } + + for j := 0; j < 4; j++ { + var b [5]uint8 + copy(b[:], round.b[j][:]) + w := sBox[4][(t[b[0]>>2]>>(24-8*(b[0]&3)))&0xff] + w ^= sBox[5][(t[b[1]>>2]>>(24-8*(b[1]&3)))&0xff] + w ^= sBox[6][(t[b[2]>>2]>>(24-8*(b[2]&3)))&0xff] + w ^= sBox[7][(t[b[3]>>2]>>(24-8*(b[3]&3)))&0xff] + w ^= sBox[4+j][(t[b[4]>>2]>>(24-8*(b[4]&3)))&0xff] + k[ki] = w + ki++ + } + } + } + + for i := 0; i < 16; i++ { + c.masking[i] = k[i] + c.rotate[i] = uint8(k[16+i] & 0x1f) + } +} + +// These are the three 'f' functions. See RFC 2144, section 2.2. +func f1(d, m uint32, r uint8) uint32 { + t := m + d + I := (t << r) | (t >> (32 - r)) + return ((sBox[0][I>>24] ^ sBox[1][(I>>16)&0xff]) - sBox[2][(I>>8)&0xff]) + sBox[3][I&0xff] +} + +func f2(d, m uint32, r uint8) uint32 { + t := m ^ d + I := (t << r) | (t >> (32 - r)) + return ((sBox[0][I>>24] - sBox[1][(I>>16)&0xff]) + sBox[2][(I>>8)&0xff]) ^ sBox[3][I&0xff] +} + +func f3(d, m uint32, r uint8) uint32 { + t := m - d + I := (t << r) | (t >> (32 - r)) + return ((sBox[0][I>>24] + sBox[1][(I>>16)&0xff]) ^ sBox[2][(I>>8)&0xff]) - sBox[3][I&0xff] +} + +var sBox = [8][256]uint32{ + { + 0x30fb40d4, 0x9fa0ff0b, 0x6beccd2f, 0x3f258c7a, 0x1e213f2f, 0x9c004dd3, 0x6003e540, 0xcf9fc949, + 0xbfd4af27, 0x88bbbdb5, 0xe2034090, 0x98d09675, 0x6e63a0e0, 0x15c361d2, 0xc2e7661d, 0x22d4ff8e, + 0x28683b6f, 0xc07fd059, 0xff2379c8, 0x775f50e2, 0x43c340d3, 0xdf2f8656, 0x887ca41a, 0xa2d2bd2d, + 0xa1c9e0d6, 0x346c4819, 0x61b76d87, 0x22540f2f, 0x2abe32e1, 0xaa54166b, 0x22568e3a, 0xa2d341d0, + 0x66db40c8, 0xa784392f, 0x004dff2f, 0x2db9d2de, 0x97943fac, 0x4a97c1d8, 0x527644b7, 0xb5f437a7, + 0xb82cbaef, 0xd751d159, 0x6ff7f0ed, 0x5a097a1f, 0x827b68d0, 0x90ecf52e, 0x22b0c054, 0xbc8e5935, + 0x4b6d2f7f, 0x50bb64a2, 0xd2664910, 0xbee5812d, 0xb7332290, 0xe93b159f, 0xb48ee411, 0x4bff345d, + 0xfd45c240, 0xad31973f, 0xc4f6d02e, 0x55fc8165, 0xd5b1caad, 0xa1ac2dae, 0xa2d4b76d, 0xc19b0c50, + 0x882240f2, 0x0c6e4f38, 0xa4e4bfd7, 0x4f5ba272, 0x564c1d2f, 0xc59c5319, 0xb949e354, 0xb04669fe, + 0xb1b6ab8a, 0xc71358dd, 0x6385c545, 0x110f935d, 0x57538ad5, 0x6a390493, 0xe63d37e0, 0x2a54f6b3, + 0x3a787d5f, 0x6276a0b5, 0x19a6fcdf, 0x7a42206a, 0x29f9d4d5, 0xf61b1891, 0xbb72275e, 0xaa508167, + 0x38901091, 0xc6b505eb, 0x84c7cb8c, 0x2ad75a0f, 0x874a1427, 0xa2d1936b, 0x2ad286af, 0xaa56d291, + 0xd7894360, 0x425c750d, 0x93b39e26, 0x187184c9, 0x6c00b32d, 0x73e2bb14, 0xa0bebc3c, 0x54623779, + 0x64459eab, 0x3f328b82, 0x7718cf82, 0x59a2cea6, 0x04ee002e, 0x89fe78e6, 0x3fab0950, 0x325ff6c2, + 0x81383f05, 0x6963c5c8, 0x76cb5ad6, 0xd49974c9, 0xca180dcf, 0x380782d5, 0xc7fa5cf6, 0x8ac31511, + 0x35e79e13, 0x47da91d0, 0xf40f9086, 0xa7e2419e, 0x31366241, 0x051ef495, 0xaa573b04, 0x4a805d8d, + 0x548300d0, 0x00322a3c, 0xbf64cddf, 0xba57a68e, 0x75c6372b, 0x50afd341, 0xa7c13275, 0x915a0bf5, + 0x6b54bfab, 0x2b0b1426, 0xab4cc9d7, 0x449ccd82, 0xf7fbf265, 0xab85c5f3, 0x1b55db94, 0xaad4e324, + 0xcfa4bd3f, 0x2deaa3e2, 0x9e204d02, 0xc8bd25ac, 0xeadf55b3, 0xd5bd9e98, 0xe31231b2, 0x2ad5ad6c, + 0x954329de, 0xadbe4528, 0xd8710f69, 0xaa51c90f, 0xaa786bf6, 0x22513f1e, 0xaa51a79b, 0x2ad344cc, + 0x7b5a41f0, 0xd37cfbad, 0x1b069505, 0x41ece491, 0xb4c332e6, 0x032268d4, 0xc9600acc, 0xce387e6d, + 0xbf6bb16c, 0x6a70fb78, 0x0d03d9c9, 0xd4df39de, 0xe01063da, 0x4736f464, 0x5ad328d8, 0xb347cc96, + 0x75bb0fc3, 0x98511bfb, 0x4ffbcc35, 0xb58bcf6a, 0xe11f0abc, 0xbfc5fe4a, 0xa70aec10, 0xac39570a, + 0x3f04442f, 0x6188b153, 0xe0397a2e, 0x5727cb79, 0x9ceb418f, 0x1cacd68d, 0x2ad37c96, 0x0175cb9d, + 0xc69dff09, 0xc75b65f0, 0xd9db40d8, 0xec0e7779, 0x4744ead4, 0xb11c3274, 0xdd24cb9e, 0x7e1c54bd, + 0xf01144f9, 0xd2240eb1, 0x9675b3fd, 0xa3ac3755, 0xd47c27af, 0x51c85f4d, 0x56907596, 0xa5bb15e6, + 0x580304f0, 0xca042cf1, 0x011a37ea, 0x8dbfaadb, 0x35ba3e4a, 0x3526ffa0, 0xc37b4d09, 0xbc306ed9, + 0x98a52666, 0x5648f725, 0xff5e569d, 0x0ced63d0, 0x7c63b2cf, 0x700b45e1, 0xd5ea50f1, 0x85a92872, + 0xaf1fbda7, 0xd4234870, 0xa7870bf3, 0x2d3b4d79, 0x42e04198, 0x0cd0ede7, 0x26470db8, 0xf881814c, + 0x474d6ad7, 0x7c0c5e5c, 0xd1231959, 0x381b7298, 0xf5d2f4db, 0xab838653, 0x6e2f1e23, 0x83719c9e, + 0xbd91e046, 0x9a56456e, 0xdc39200c, 0x20c8c571, 0x962bda1c, 0xe1e696ff, 0xb141ab08, 0x7cca89b9, + 0x1a69e783, 0x02cc4843, 0xa2f7c579, 0x429ef47d, 0x427b169c, 0x5ac9f049, 0xdd8f0f00, 0x5c8165bf, + }, + { + 0x1f201094, 0xef0ba75b, 0x69e3cf7e, 0x393f4380, 0xfe61cf7a, 0xeec5207a, 0x55889c94, 0x72fc0651, + 0xada7ef79, 0x4e1d7235, 0xd55a63ce, 0xde0436ba, 0x99c430ef, 0x5f0c0794, 0x18dcdb7d, 0xa1d6eff3, + 0xa0b52f7b, 0x59e83605, 0xee15b094, 0xe9ffd909, 0xdc440086, 0xef944459, 0xba83ccb3, 0xe0c3cdfb, + 0xd1da4181, 0x3b092ab1, 0xf997f1c1, 0xa5e6cf7b, 0x01420ddb, 0xe4e7ef5b, 0x25a1ff41, 0xe180f806, + 0x1fc41080, 0x179bee7a, 0xd37ac6a9, 0xfe5830a4, 0x98de8b7f, 0x77e83f4e, 0x79929269, 0x24fa9f7b, + 0xe113c85b, 0xacc40083, 0xd7503525, 0xf7ea615f, 0x62143154, 0x0d554b63, 0x5d681121, 0xc866c359, + 0x3d63cf73, 0xcee234c0, 0xd4d87e87, 0x5c672b21, 0x071f6181, 0x39f7627f, 0x361e3084, 0xe4eb573b, + 0x602f64a4, 0xd63acd9c, 0x1bbc4635, 0x9e81032d, 0x2701f50c, 0x99847ab4, 0xa0e3df79, 0xba6cf38c, + 0x10843094, 0x2537a95e, 0xf46f6ffe, 0xa1ff3b1f, 0x208cfb6a, 0x8f458c74, 0xd9e0a227, 0x4ec73a34, + 0xfc884f69, 0x3e4de8df, 0xef0e0088, 0x3559648d, 0x8a45388c, 0x1d804366, 0x721d9bfd, 0xa58684bb, + 0xe8256333, 0x844e8212, 0x128d8098, 0xfed33fb4, 0xce280ae1, 0x27e19ba5, 0xd5a6c252, 0xe49754bd, + 0xc5d655dd, 0xeb667064, 0x77840b4d, 0xa1b6a801, 0x84db26a9, 0xe0b56714, 0x21f043b7, 0xe5d05860, + 0x54f03084, 0x066ff472, 0xa31aa153, 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0x6dba0ec3, + 0x083919a7, 0x9fbaeed9, 0x49dbcfb0, 0x4e670c53, 0x5c3d9c01, 0x64bdb941, 0x2c0e636a, 0xba7dd9cd, + 0xea6f7388, 0xe70bc762, 0x35f29adb, 0x5c4cdd8d, 0xf0d48d8c, 0xb88153e2, 0x08a19866, 0x1ae2eac8, + 0x284caf89, 0xaa928223, 0x9334be53, 0x3b3a21bf, 0x16434be3, 0x9aea3906, 0xefe8c36e, 0xf890cdd9, + 0x80226dae, 0xc340a4a3, 0xdf7e9c09, 0xa694a807, 0x5b7c5ecc, 0x221db3a6, 0x9a69a02f, 0x68818a54, + 0xceb2296f, 0x53c0843a, 0xfe893655, 0x25bfe68a, 0xb4628abc, 0xcf222ebf, 0x25ac6f48, 0xa9a99387, + 0x53bddb65, 0xe76ffbe7, 0xe967fd78, 0x0ba93563, 0x8e342bc1, 0xe8a11be9, 0x4980740d, 0xc8087dfc, + 0x8de4bf99, 0xa11101a0, 0x7fd37975, 0xda5a26c0, 0xe81f994f, 0x9528cd89, 0xfd339fed, 0xb87834bf, + 0x5f04456d, 0x22258698, 0xc9c4c83b, 0x2dc156be, 0x4f628daa, 0x57f55ec5, 0xe2220abe, 0xd2916ebf, + 0x4ec75b95, 0x24f2c3c0, 0x42d15d99, 0xcd0d7fa0, 0x7b6e27ff, 0xa8dc8af0, 0x7345c106, 0xf41e232f, + 0x35162386, 0xe6ea8926, 0x3333b094, 0x157ec6f2, 0x372b74af, 0x692573e4, 0xe9a9d848, 0xf3160289, + 0x3a62ef1d, 0xa787e238, 0xf3a5f676, 0x74364853, 0x20951063, 0x4576698d, 0xb6fad407, 0x592af950, + 0x36f73523, 0x4cfb6e87, 0x7da4cec0, 0x6c152daa, 0xcb0396a8, 0xc50dfe5d, 0xfcd707ab, 0x0921c42f, + 0x89dff0bb, 0x5fe2be78, 0x448f4f33, 0x754613c9, 0x2b05d08d, 0x48b9d585, 0xdc049441, 0xc8098f9b, + 0x7dede786, 0xc39a3373, 0x42410005, 0x6a091751, 0x0ef3c8a6, 0x890072d6, 0x28207682, 0xa9a9f7be, + 0xbf32679d, 0xd45b5b75, 0xb353fd00, 0xcbb0e358, 0x830f220a, 0x1f8fb214, 0xd372cf08, 0xcc3c4a13, + 0x8cf63166, 0x061c87be, 0x88c98f88, 0x6062e397, 0x47cf8e7a, 0xb6c85283, 0x3cc2acfb, 0x3fc06976, + 0x4e8f0252, 0x64d8314d, 0xda3870e3, 0x1e665459, 0xc10908f0, 0x513021a5, 0x6c5b68b7, 0x822f8aa0, + 0x3007cd3e, 0x74719eef, 0xdc872681, 0x073340d4, 0x7e432fd9, 0x0c5ec241, 0x8809286c, 0xf592d891, + 0x08a930f6, 0x957ef305, 0xb7fbffbd, 0xc266e96f, 0x6fe4ac98, 0xb173ecc0, 0xbc60b42a, 0x953498da, + 0xfba1ae12, 0x2d4bd736, 0x0f25faab, 0xa4f3fceb, 0xe2969123, 0x257f0c3d, 0x9348af49, 0x361400bc, + 0xe8816f4a, 0x3814f200, 0xa3f94043, 0x9c7a54c2, 0xbc704f57, 0xda41e7f9, 0xc25ad33a, 0x54f4a084, + 0xb17f5505, 0x59357cbe, 0xedbd15c8, 0x7f97c5ab, 0xba5ac7b5, 0xb6f6deaf, 0x3a479c3a, 0x5302da25, + 0x653d7e6a, 0x54268d49, 0x51a477ea, 0x5017d55b, 0xd7d25d88, 0x44136c76, 0x0404a8c8, 0xb8e5a121, + 0xb81a928a, 0x60ed5869, 0x97c55b96, 0xeaec991b, 0x29935913, 0x01fdb7f1, 0x088e8dfa, 0x9ab6f6f5, + 0x3b4cbf9f, 0x4a5de3ab, 0xe6051d35, 0xa0e1d855, 0xd36b4cf1, 0xf544edeb, 0xb0e93524, 0xbebb8fbd, + 0xa2d762cf, 0x49c92f54, 0x38b5f331, 0x7128a454, 0x48392905, 0xa65b1db8, 0x851c97bd, 0xd675cf2f, + }, + { + 0x85e04019, 0x332bf567, 0x662dbfff, 0xcfc65693, 0x2a8d7f6f, 0xab9bc912, 0xde6008a1, 0x2028da1f, + 0x0227bce7, 0x4d642916, 0x18fac300, 0x50f18b82, 0x2cb2cb11, 0xb232e75c, 0x4b3695f2, 0xb28707de, + 0xa05fbcf6, 0xcd4181e9, 0xe150210c, 0xe24ef1bd, 0xb168c381, 0xfde4e789, 0x5c79b0d8, 0x1e8bfd43, + 0x4d495001, 0x38be4341, 0x913cee1d, 0x92a79c3f, 0x089766be, 0xbaeeadf4, 0x1286becf, 0xb6eacb19, + 0x2660c200, 0x7565bde4, 0x64241f7a, 0x8248dca9, 0xc3b3ad66, 0x28136086, 0x0bd8dfa8, 0x356d1cf2, + 0x107789be, 0xb3b2e9ce, 0x0502aa8f, 0x0bc0351e, 0x166bf52a, 0xeb12ff82, 0xe3486911, 0xd34d7516, + 0x4e7b3aff, 0x5f43671b, 0x9cf6e037, 0x4981ac83, 0x334266ce, 0x8c9341b7, 0xd0d854c0, 0xcb3a6c88, + 0x47bc2829, 0x4725ba37, 0xa66ad22b, 0x7ad61f1e, 0x0c5cbafa, 0x4437f107, 0xb6e79962, 0x42d2d816, + 0x0a961288, 0xe1a5c06e, 0x13749e67, 0x72fc081a, 0xb1d139f7, 0xf9583745, 0xcf19df58, 0xbec3f756, + 0xc06eba30, 0x07211b24, 0x45c28829, 0xc95e317f, 0xbc8ec511, 0x38bc46e9, 0xc6e6fa14, 0xbae8584a, + 0xad4ebc46, 0x468f508b, 0x7829435f, 0xf124183b, 0x821dba9f, 0xaff60ff4, 0xea2c4e6d, 0x16e39264, + 0x92544a8b, 0x009b4fc3, 0xaba68ced, 0x9ac96f78, 0x06a5b79a, 0xb2856e6e, 0x1aec3ca9, 0xbe838688, + 0x0e0804e9, 0x55f1be56, 0xe7e5363b, 0xb3a1f25d, 0xf7debb85, 0x61fe033c, 0x16746233, 0x3c034c28, + 0xda6d0c74, 0x79aac56c, 0x3ce4e1ad, 0x51f0c802, 0x98f8f35a, 0x1626a49f, 0xeed82b29, 0x1d382fe3, + 0x0c4fb99a, 0xbb325778, 0x3ec6d97b, 0x6e77a6a9, 0xcb658b5c, 0xd45230c7, 0x2bd1408b, 0x60c03eb7, + 0xb9068d78, 0xa33754f4, 0xf430c87d, 0xc8a71302, 0xb96d8c32, 0xebd4e7be, 0xbe8b9d2d, 0x7979fb06, + 0xe7225308, 0x8b75cf77, 0x11ef8da4, 0xe083c858, 0x8d6b786f, 0x5a6317a6, 0xfa5cf7a0, 0x5dda0033, + 0xf28ebfb0, 0xf5b9c310, 0xa0eac280, 0x08b9767a, 0xa3d9d2b0, 0x79d34217, 0x021a718d, 0x9ac6336a, + 0x2711fd60, 0x438050e3, 0x069908a8, 0x3d7fedc4, 0x826d2bef, 0x4eeb8476, 0x488dcf25, 0x36c9d566, + 0x28e74e41, 0xc2610aca, 0x3d49a9cf, 0xbae3b9df, 0xb65f8de6, 0x92aeaf64, 0x3ac7d5e6, 0x9ea80509, + 0xf22b017d, 0xa4173f70, 0xdd1e16c3, 0x15e0d7f9, 0x50b1b887, 0x2b9f4fd5, 0x625aba82, 0x6a017962, + 0x2ec01b9c, 0x15488aa9, 0xd716e740, 0x40055a2c, 0x93d29a22, 0xe32dbf9a, 0x058745b9, 0x3453dc1e, + 0xd699296e, 0x496cff6f, 0x1c9f4986, 0xdfe2ed07, 0xb87242d1, 0x19de7eae, 0x053e561a, 0x15ad6f8c, + 0x66626c1c, 0x7154c24c, 0xea082b2a, 0x93eb2939, 0x17dcb0f0, 0x58d4f2ae, 0x9ea294fb, 0x52cf564c, + 0x9883fe66, 0x2ec40581, 0x763953c3, 0x01d6692e, 0xd3a0c108, 0xa1e7160e, 0xe4f2dfa6, 0x693ed285, + 0x74904698, 0x4c2b0edd, 0x4f757656, 0x5d393378, 0xa132234f, 0x3d321c5d, 0xc3f5e194, 0x4b269301, + 0xc79f022f, 0x3c997e7e, 0x5e4f9504, 0x3ffafbbd, 0x76f7ad0e, 0x296693f4, 0x3d1fce6f, 0xc61e45be, + 0xd3b5ab34, 0xf72bf9b7, 0x1b0434c0, 0x4e72b567, 0x5592a33d, 0xb5229301, 0xcfd2a87f, 0x60aeb767, + 0x1814386b, 0x30bcc33d, 0x38a0c07d, 0xfd1606f2, 0xc363519b, 0x589dd390, 0x5479f8e6, 0x1cb8d647, + 0x97fd61a9, 0xea7759f4, 0x2d57539d, 0x569a58cf, 0xe84e63ad, 0x462e1b78, 0x6580f87e, 0xf3817914, + 0x91da55f4, 0x40a230f3, 0xd1988f35, 0xb6e318d2, 0x3ffa50bc, 0x3d40f021, 0xc3c0bdae, 0x4958c24c, + 0x518f36b2, 0x84b1d370, 0x0fedce83, 0x878ddada, 0xf2a279c7, 0x94e01be8, 0x90716f4b, 0x954b8aa3, + }, + { + 0xe216300d, 0xbbddfffc, 0xa7ebdabd, 0x35648095, 0x7789f8b7, 0xe6c1121b, 0x0e241600, 0x052ce8b5, + 0x11a9cfb0, 0xe5952f11, 0xece7990a, 0x9386d174, 0x2a42931c, 0x76e38111, 0xb12def3a, 0x37ddddfc, + 0xde9adeb1, 0x0a0cc32c, 0xbe197029, 0x84a00940, 0xbb243a0f, 0xb4d137cf, 0xb44e79f0, 0x049eedfd, + 0x0b15a15d, 0x480d3168, 0x8bbbde5a, 0x669ded42, 0xc7ece831, 0x3f8f95e7, 0x72df191b, 0x7580330d, + 0x94074251, 0x5c7dcdfa, 0xabbe6d63, 0xaa402164, 0xb301d40a, 0x02e7d1ca, 0x53571dae, 0x7a3182a2, + 0x12a8ddec, 0xfdaa335d, 0x176f43e8, 0x71fb46d4, 0x38129022, 0xce949ad4, 0xb84769ad, 0x965bd862, + 0x82f3d055, 0x66fb9767, 0x15b80b4e, 0x1d5b47a0, 0x4cfde06f, 0xc28ec4b8, 0x57e8726e, 0x647a78fc, + 0x99865d44, 0x608bd593, 0x6c200e03, 0x39dc5ff6, 0x5d0b00a3, 0xae63aff2, 0x7e8bd632, 0x70108c0c, + 0xbbd35049, 0x2998df04, 0x980cf42a, 0x9b6df491, 0x9e7edd53, 0x06918548, 0x58cb7e07, 0x3b74ef2e, + 0x522fffb1, 0xd24708cc, 0x1c7e27cd, 0xa4eb215b, 0x3cf1d2e2, 0x19b47a38, 0x424f7618, 0x35856039, + 0x9d17dee7, 0x27eb35e6, 0xc9aff67b, 0x36baf5b8, 0x09c467cd, 0xc18910b1, 0xe11dbf7b, 0x06cd1af8, + 0x7170c608, 0x2d5e3354, 0xd4de495a, 0x64c6d006, 0xbcc0c62c, 0x3dd00db3, 0x708f8f34, 0x77d51b42, + 0x264f620f, 0x24b8d2bf, 0x15c1b79e, 0x46a52564, 0xf8d7e54e, 0x3e378160, 0x7895cda5, 0x859c15a5, + 0xe6459788, 0xc37bc75f, 0xdb07ba0c, 0x0676a3ab, 0x7f229b1e, 0x31842e7b, 0x24259fd7, 0xf8bef472, + 0x835ffcb8, 0x6df4c1f2, 0x96f5b195, 0xfd0af0fc, 0xb0fe134c, 0xe2506d3d, 0x4f9b12ea, 0xf215f225, + 0xa223736f, 0x9fb4c428, 0x25d04979, 0x34c713f8, 0xc4618187, 0xea7a6e98, 0x7cd16efc, 0x1436876c, + 0xf1544107, 0xbedeee14, 0x56e9af27, 0xa04aa441, 0x3cf7c899, 0x92ecbae6, 0xdd67016d, 0x151682eb, + 0xa842eedf, 0xfdba60b4, 0xf1907b75, 0x20e3030f, 0x24d8c29e, 0xe139673b, 0xefa63fb8, 0x71873054, + 0xb6f2cf3b, 0x9f326442, 0xcb15a4cc, 0xb01a4504, 0xf1e47d8d, 0x844a1be5, 0xbae7dfdc, 0x42cbda70, + 0xcd7dae0a, 0x57e85b7a, 0xd53f5af6, 0x20cf4d8c, 0xcea4d428, 0x79d130a4, 0x3486ebfb, 0x33d3cddc, + 0x77853b53, 0x37effcb5, 0xc5068778, 0xe580b3e6, 0x4e68b8f4, 0xc5c8b37e, 0x0d809ea2, 0x398feb7c, + 0x132a4f94, 0x43b7950e, 0x2fee7d1c, 0x223613bd, 0xdd06caa2, 0x37df932b, 0xc4248289, 0xacf3ebc3, + 0x5715f6b7, 0xef3478dd, 0xf267616f, 0xc148cbe4, 0x9052815e, 0x5e410fab, 0xb48a2465, 0x2eda7fa4, + 0xe87b40e4, 0xe98ea084, 0x5889e9e1, 0xefd390fc, 0xdd07d35b, 0xdb485694, 0x38d7e5b2, 0x57720101, + 0x730edebc, 0x5b643113, 0x94917e4f, 0x503c2fba, 0x646f1282, 0x7523d24a, 0xe0779695, 0xf9c17a8f, + 0x7a5b2121, 0xd187b896, 0x29263a4d, 0xba510cdf, 0x81f47c9f, 0xad1163ed, 0xea7b5965, 0x1a00726e, + 0x11403092, 0x00da6d77, 0x4a0cdd61, 0xad1f4603, 0x605bdfb0, 0x9eedc364, 0x22ebe6a8, 0xcee7d28a, + 0xa0e736a0, 0x5564a6b9, 0x10853209, 0xc7eb8f37, 0x2de705ca, 0x8951570f, 0xdf09822b, 0xbd691a6c, + 0xaa12e4f2, 0x87451c0f, 0xe0f6a27a, 0x3ada4819, 0x4cf1764f, 0x0d771c2b, 0x67cdb156, 0x350d8384, + 0x5938fa0f, 0x42399ef3, 0x36997b07, 0x0e84093d, 0x4aa93e61, 0x8360d87b, 0x1fa98b0c, 0x1149382c, + 0xe97625a5, 0x0614d1b7, 0x0e25244b, 0x0c768347, 0x589e8d82, 0x0d2059d1, 0xa466bb1e, 0xf8da0a82, + 0x04f19130, 0xba6e4ec0, 0x99265164, 0x1ee7230d, 0x50b2ad80, 0xeaee6801, 0x8db2a283, 0xea8bf59e, + }, +} diff --git a/vendor/golang.org/x/crypto/openpgp/armor/armor.go b/vendor/golang.org/x/crypto/openpgp/armor/armor.go new file mode 100644 index 0000000..592d186 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/armor/armor.go @@ -0,0 +1,219 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package armor implements OpenPGP ASCII Armor, see RFC 4880. OpenPGP Armor is +// very similar to PEM except that it has an additional CRC checksum. +package armor // import "golang.org/x/crypto/openpgp/armor" + +import ( + "bufio" + "bytes" + "encoding/base64" + "golang.org/x/crypto/openpgp/errors" + "io" +) + +// A Block represents an OpenPGP armored structure. +// +// The encoded form is: +// -----BEGIN Type----- +// Headers +// +// base64-encoded Bytes +// '=' base64 encoded checksum +// -----END Type----- +// where Headers is a possibly empty sequence of Key: Value lines. +// +// Since the armored data can be very large, this package presents a streaming +// interface. +type Block struct { + Type string // The type, taken from the preamble (i.e. "PGP SIGNATURE"). + Header map[string]string // Optional headers. + Body io.Reader // A Reader from which the contents can be read + lReader lineReader + oReader openpgpReader +} + +var ArmorCorrupt error = errors.StructuralError("armor invalid") + +const crc24Init = 0xb704ce +const crc24Poly = 0x1864cfb +const crc24Mask = 0xffffff + +// crc24 calculates the OpenPGP checksum as specified in RFC 4880, section 6.1 +func crc24(crc uint32, d []byte) uint32 { + for _, b := range d { + crc ^= uint32(b) << 16 + for i := 0; i < 8; i++ { + crc <<= 1 + if crc&0x1000000 != 0 { + crc ^= crc24Poly + } + } + } + return crc +} + +var armorStart = []byte("-----BEGIN ") +var armorEnd = []byte("-----END ") +var armorEndOfLine = []byte("-----") + +// lineReader wraps a line based reader. It watches for the end of an armor +// block and records the expected CRC value. +type lineReader struct { + in *bufio.Reader + buf []byte + eof bool + crc uint32 +} + +func (l *lineReader) Read(p []byte) (n int, err error) { + if l.eof { + return 0, io.EOF + } + + if len(l.buf) > 0 { + n = copy(p, l.buf) + l.buf = l.buf[n:] + return + } + + line, isPrefix, err := l.in.ReadLine() + if err != nil { + return + } + if isPrefix { + return 0, ArmorCorrupt + } + + if len(line) == 5 && line[0] == '=' { + // This is the checksum line + var expectedBytes [3]byte + var m int + m, err = base64.StdEncoding.Decode(expectedBytes[0:], line[1:]) + if m != 3 || err != nil { + return + } + l.crc = uint32(expectedBytes[0])<<16 | + uint32(expectedBytes[1])<<8 | + uint32(expectedBytes[2]) + + line, _, err = l.in.ReadLine() + if err != nil && err != io.EOF { + return + } + if !bytes.HasPrefix(line, armorEnd) { + return 0, ArmorCorrupt + } + + l.eof = true + return 0, io.EOF + } + + if len(line) > 96 { + return 0, ArmorCorrupt + } + + n = copy(p, line) + bytesToSave := len(line) - n + if bytesToSave > 0 { + if cap(l.buf) < bytesToSave { + l.buf = make([]byte, 0, bytesToSave) + } + l.buf = l.buf[0:bytesToSave] + copy(l.buf, line[n:]) + } + + return +} + +// openpgpReader passes Read calls to the underlying base64 decoder, but keeps +// a running CRC of the resulting data and checks the CRC against the value +// found by the lineReader at EOF. +type openpgpReader struct { + lReader *lineReader + b64Reader io.Reader + currentCRC uint32 +} + +func (r *openpgpReader) Read(p []byte) (n int, err error) { + n, err = r.b64Reader.Read(p) + r.currentCRC = crc24(r.currentCRC, p[:n]) + + if err == io.EOF { + if r.lReader.crc != uint32(r.currentCRC&crc24Mask) { + return 0, ArmorCorrupt + } + } + + return +} + +// Decode reads a PGP armored block from the given Reader. It will ignore +// leading garbage. If it doesn't find a block, it will return nil, io.EOF. The +// given Reader is not usable after calling this function: an arbitrary amount +// of data may have been read past the end of the block. +func Decode(in io.Reader) (p *Block, err error) { + r := bufio.NewReaderSize(in, 100) + var line []byte + ignoreNext := false + +TryNextBlock: + p = nil + + // Skip leading garbage + for { + ignoreThis := ignoreNext + line, ignoreNext, err = r.ReadLine() + if err != nil { + return + } + if ignoreNext || ignoreThis { + continue + } + line = bytes.TrimSpace(line) + if len(line) > len(armorStart)+len(armorEndOfLine) && bytes.HasPrefix(line, armorStart) { + break + } + } + + p = new(Block) + p.Type = string(line[len(armorStart) : len(line)-len(armorEndOfLine)]) + p.Header = make(map[string]string) + nextIsContinuation := false + var lastKey string + + // Read headers + for { + isContinuation := nextIsContinuation + line, nextIsContinuation, err = r.ReadLine() + if err != nil { + p = nil + return + } + if isContinuation { + p.Header[lastKey] += string(line) + continue + } + line = bytes.TrimSpace(line) + if len(line) == 0 { + break + } + + i := bytes.Index(line, []byte(": ")) + if i == -1 { + goto TryNextBlock + } + lastKey = string(line[:i]) + p.Header[lastKey] = string(line[i+2:]) + } + + p.lReader.in = r + p.oReader.currentCRC = crc24Init + p.oReader.lReader = &p.lReader + p.oReader.b64Reader = base64.NewDecoder(base64.StdEncoding, &p.lReader) + p.Body = &p.oReader + + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/armor/encode.go b/vendor/golang.org/x/crypto/openpgp/armor/encode.go new file mode 100644 index 0000000..6f07582 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/armor/encode.go @@ -0,0 +1,160 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package armor + +import ( + "encoding/base64" + "io" +) + +var armorHeaderSep = []byte(": ") +var blockEnd = []byte("\n=") +var newline = []byte("\n") +var armorEndOfLineOut = []byte("-----\n") + +// writeSlices writes its arguments to the given Writer. +func writeSlices(out io.Writer, slices ...[]byte) (err error) { + for _, s := range slices { + _, err = out.Write(s) + if err != nil { + return err + } + } + return +} + +// lineBreaker breaks data across several lines, all of the same byte length +// (except possibly the last). Lines are broken with a single '\n'. +type lineBreaker struct { + lineLength int + line []byte + used int + out io.Writer + haveWritten bool +} + +func newLineBreaker(out io.Writer, lineLength int) *lineBreaker { + return &lineBreaker{ + lineLength: lineLength, + line: make([]byte, lineLength), + used: 0, + out: out, + } +} + +func (l *lineBreaker) Write(b []byte) (n int, err error) { + n = len(b) + + if n == 0 { + return + } + + if l.used == 0 && l.haveWritten { + _, err = l.out.Write([]byte{'\n'}) + if err != nil { + return + } + } + + if l.used+len(b) < l.lineLength { + l.used += copy(l.line[l.used:], b) + return + } + + l.haveWritten = true + _, err = l.out.Write(l.line[0:l.used]) + if err != nil { + return + } + excess := l.lineLength - l.used + l.used = 0 + + _, err = l.out.Write(b[0:excess]) + if err != nil { + return + } + + _, err = l.Write(b[excess:]) + return +} + +func (l *lineBreaker) Close() (err error) { + if l.used > 0 { + _, err = l.out.Write(l.line[0:l.used]) + if err != nil { + return + } + } + + return +} + +// encoding keeps track of a running CRC24 over the data which has been written +// to it and outputs a OpenPGP checksum when closed, followed by an armor +// trailer. +// +// It's built into a stack of io.Writers: +// encoding -> base64 encoder -> lineBreaker -> out +type encoding struct { + out io.Writer + breaker *lineBreaker + b64 io.WriteCloser + crc uint32 + blockType []byte +} + +func (e *encoding) Write(data []byte) (n int, err error) { + e.crc = crc24(e.crc, data) + return e.b64.Write(data) +} + +func (e *encoding) Close() (err error) { + err = e.b64.Close() + if err != nil { + return + } + e.breaker.Close() + + var checksumBytes [3]byte + checksumBytes[0] = byte(e.crc >> 16) + checksumBytes[1] = byte(e.crc >> 8) + checksumBytes[2] = byte(e.crc) + + var b64ChecksumBytes [4]byte + base64.StdEncoding.Encode(b64ChecksumBytes[:], checksumBytes[:]) + + return writeSlices(e.out, blockEnd, b64ChecksumBytes[:], newline, armorEnd, e.blockType, armorEndOfLine) +} + +// Encode returns a WriteCloser which will encode the data written to it in +// OpenPGP armor. +func Encode(out io.Writer, blockType string, headers map[string]string) (w io.WriteCloser, err error) { + bType := []byte(blockType) + err = writeSlices(out, armorStart, bType, armorEndOfLineOut) + if err != nil { + return + } + + for k, v := range headers { + err = writeSlices(out, []byte(k), armorHeaderSep, []byte(v), newline) + if err != nil { + return + } + } + + _, err = out.Write(newline) + if err != nil { + return + } + + e := &encoding{ + out: out, + breaker: newLineBreaker(out, 64), + crc: crc24Init, + blockType: bType, + } + e.b64 = base64.NewEncoder(base64.StdEncoding, e.breaker) + return e, nil +} diff --git a/vendor/golang.org/x/crypto/openpgp/canonical_text.go b/vendor/golang.org/x/crypto/openpgp/canonical_text.go new file mode 100644 index 0000000..e601e38 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/canonical_text.go @@ -0,0 +1,59 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package openpgp + +import "hash" + +// NewCanonicalTextHash reformats text written to it into the canonical +// form and then applies the hash h. See RFC 4880, section 5.2.1. +func NewCanonicalTextHash(h hash.Hash) hash.Hash { + return &canonicalTextHash{h, 0} +} + +type canonicalTextHash struct { + h hash.Hash + s int +} + +var newline = []byte{'\r', '\n'} + +func (cth *canonicalTextHash) Write(buf []byte) (int, error) { + start := 0 + + for i, c := range buf { + switch cth.s { + case 0: + if c == '\r' { + cth.s = 1 + } else if c == '\n' { + cth.h.Write(buf[start:i]) + cth.h.Write(newline) + start = i + 1 + } + case 1: + cth.s = 0 + } + } + + cth.h.Write(buf[start:]) + return len(buf), nil +} + +func (cth *canonicalTextHash) Sum(in []byte) []byte { + return cth.h.Sum(in) +} + +func (cth *canonicalTextHash) Reset() { + cth.h.Reset() + cth.s = 0 +} + +func (cth *canonicalTextHash) Size() int { + return cth.h.Size() +} + +func (cth *canonicalTextHash) BlockSize() int { + return cth.h.BlockSize() +} diff --git a/vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go b/vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go new file mode 100644 index 0000000..73f4fe3 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go @@ -0,0 +1,122 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package elgamal implements ElGamal encryption, suitable for OpenPGP, +// as specified in "A Public-Key Cryptosystem and a Signature Scheme Based on +// Discrete Logarithms," IEEE Transactions on Information Theory, v. IT-31, +// n. 4, 1985, pp. 469-472. +// +// This form of ElGamal embeds PKCS#1 v1.5 padding, which may make it +// unsuitable for other protocols. RSA should be used in preference in any +// case. +package elgamal // import "golang.org/x/crypto/openpgp/elgamal" + +import ( + "crypto/rand" + "crypto/subtle" + "errors" + "io" + "math/big" +) + +// PublicKey represents an ElGamal public key. +type PublicKey struct { + G, P, Y *big.Int +} + +// PrivateKey represents an ElGamal private key. +type PrivateKey struct { + PublicKey + X *big.Int +} + +// Encrypt encrypts the given message to the given public key. The result is a +// pair of integers. Errors can result from reading random, or because msg is +// too large to be encrypted to the public key. +func Encrypt(random io.Reader, pub *PublicKey, msg []byte) (c1, c2 *big.Int, err error) { + pLen := (pub.P.BitLen() + 7) / 8 + if len(msg) > pLen-11 { + err = errors.New("elgamal: message too long") + return + } + + // EM = 0x02 || PS || 0x00 || M + em := make([]byte, pLen-1) + em[0] = 2 + ps, mm := em[1:len(em)-len(msg)-1], em[len(em)-len(msg):] + err = nonZeroRandomBytes(ps, random) + if err != nil { + return + } + em[len(em)-len(msg)-1] = 0 + copy(mm, msg) + + m := new(big.Int).SetBytes(em) + + k, err := rand.Int(random, pub.P) + if err != nil { + return + } + + c1 = new(big.Int).Exp(pub.G, k, pub.P) + s := new(big.Int).Exp(pub.Y, k, pub.P) + c2 = s.Mul(s, m) + c2.Mod(c2, pub.P) + + return +} + +// Decrypt takes two integers, resulting from an ElGamal encryption, and +// returns the plaintext of the message. An error can result only if the +// ciphertext is invalid. Users should keep in mind that this is a padding +// oracle and thus, if exposed to an adaptive chosen ciphertext attack, can +// be used to break the cryptosystem. See ``Chosen Ciphertext Attacks +// Against Protocols Based on the RSA Encryption Standard PKCS #1'', Daniel +// Bleichenbacher, Advances in Cryptology (Crypto '98), +func Decrypt(priv *PrivateKey, c1, c2 *big.Int) (msg []byte, err error) { + s := new(big.Int).Exp(c1, priv.X, priv.P) + s.ModInverse(s, priv.P) + s.Mul(s, c2) + s.Mod(s, priv.P) + em := s.Bytes() + + firstByteIsTwo := subtle.ConstantTimeByteEq(em[0], 2) + + // The remainder of the plaintext must be a string of non-zero random + // octets, followed by a 0, followed by the message. + // lookingForIndex: 1 iff we are still looking for the zero. + // index: the offset of the first zero byte. + var lookingForIndex, index int + lookingForIndex = 1 + + for i := 1; i < len(em); i++ { + equals0 := subtle.ConstantTimeByteEq(em[i], 0) + index = subtle.ConstantTimeSelect(lookingForIndex&equals0, i, index) + lookingForIndex = subtle.ConstantTimeSelect(equals0, 0, lookingForIndex) + } + + if firstByteIsTwo != 1 || lookingForIndex != 0 || index < 9 { + return nil, errors.New("elgamal: decryption error") + } + return em[index+1:], nil +} + +// nonZeroRandomBytes fills the given slice with non-zero random octets. +func nonZeroRandomBytes(s []byte, rand io.Reader) (err error) { + _, err = io.ReadFull(rand, s) + if err != nil { + return + } + + for i := 0; i < len(s); i++ { + for s[i] == 0 { + _, err = io.ReadFull(rand, s[i:i+1]) + if err != nil { + return + } + } + } + + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/errors/errors.go b/vendor/golang.org/x/crypto/openpgp/errors/errors.go new file mode 100644 index 0000000..eb0550b --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/errors/errors.go @@ -0,0 +1,72 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package errors contains common error types for the OpenPGP packages. +package errors // import "golang.org/x/crypto/openpgp/errors" + +import ( + "strconv" +) + +// A StructuralError is returned when OpenPGP data is found to be syntactically +// invalid. +type StructuralError string + +func (s StructuralError) Error() string { + return "openpgp: invalid data: " + string(s) +} + +// UnsupportedError indicates that, although the OpenPGP data is valid, it +// makes use of currently unimplemented features. +type UnsupportedError string + +func (s UnsupportedError) Error() string { + return "openpgp: unsupported feature: " + string(s) +} + +// InvalidArgumentError indicates that the caller is in error and passed an +// incorrect value. +type InvalidArgumentError string + +func (i InvalidArgumentError) Error() string { + return "openpgp: invalid argument: " + string(i) +} + +// SignatureError indicates that a syntactically valid signature failed to +// validate. +type SignatureError string + +func (b SignatureError) Error() string { + return "openpgp: invalid signature: " + string(b) +} + +type keyIncorrectError int + +func (ki keyIncorrectError) Error() string { + return "openpgp: incorrect key" +} + +var ErrKeyIncorrect error = keyIncorrectError(0) + +type unknownIssuerError int + +func (unknownIssuerError) Error() string { + return "openpgp: signature made by unknown entity" +} + +var ErrUnknownIssuer error = unknownIssuerError(0) + +type keyRevokedError int + +func (keyRevokedError) Error() string { + return "openpgp: signature made by revoked key" +} + +var ErrKeyRevoked error = keyRevokedError(0) + +type UnknownPacketTypeError uint8 + +func (upte UnknownPacketTypeError) Error() string { + return "openpgp: unknown packet type: " + strconv.Itoa(int(upte)) +} diff --git a/vendor/golang.org/x/crypto/openpgp/keys.go b/vendor/golang.org/x/crypto/openpgp/keys.go new file mode 100644 index 0000000..aceb1b7 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/keys.go @@ -0,0 +1,640 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package openpgp + +import ( + "crypto/rsa" + "io" + "time" + + "golang.org/x/crypto/openpgp/armor" + "golang.org/x/crypto/openpgp/errors" + "golang.org/x/crypto/openpgp/packet" +) + +// PublicKeyType is the armor type for a PGP public key. +var PublicKeyType = "PGP PUBLIC KEY BLOCK" + +// PrivateKeyType is the armor type for a PGP private key. +var PrivateKeyType = "PGP PRIVATE KEY BLOCK" + +// An Entity represents the components of an OpenPGP key: a primary public key +// (which must be a signing key), one or more identities claimed by that key, +// and zero or more subkeys, which may be encryption keys. +type Entity struct { + PrimaryKey *packet.PublicKey + PrivateKey *packet.PrivateKey + Identities map[string]*Identity // indexed by Identity.Name + Revocations []*packet.Signature + Subkeys []Subkey +} + +// An Identity represents an identity claimed by an Entity and zero or more +// assertions by other entities about that claim. +type Identity struct { + Name string // by convention, has the form "Full Name (comment) " + UserId *packet.UserId + SelfSignature *packet.Signature + Signatures []*packet.Signature +} + +// A Subkey is an additional public key in an Entity. Subkeys can be used for +// encryption. +type Subkey struct { + PublicKey *packet.PublicKey + PrivateKey *packet.PrivateKey + Sig *packet.Signature +} + +// A Key identifies a specific public key in an Entity. This is either the +// Entity's primary key or a subkey. +type Key struct { + Entity *Entity + PublicKey *packet.PublicKey + PrivateKey *packet.PrivateKey + SelfSignature *packet.Signature +} + +// A KeyRing provides access to public and private keys. +type KeyRing interface { + // KeysById returns the set of keys that have the given key id. + KeysById(id uint64) []Key + // KeysByIdAndUsage returns the set of keys with the given id + // that also meet the key usage given by requiredUsage. + // The requiredUsage is expressed as the bitwise-OR of + // packet.KeyFlag* values. + KeysByIdUsage(id uint64, requiredUsage byte) []Key + // DecryptionKeys returns all private keys that are valid for + // decryption. + DecryptionKeys() []Key +} + +// primaryIdentity returns the Identity marked as primary or the first identity +// if none are so marked. +func (e *Entity) primaryIdentity() *Identity { + var firstIdentity *Identity + for _, ident := range e.Identities { + if firstIdentity == nil { + firstIdentity = ident + } + if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId { + return ident + } + } + return firstIdentity +} + +// encryptionKey returns the best candidate Key for encrypting a message to the +// given Entity. +func (e *Entity) encryptionKey(now time.Time) (Key, bool) { + candidateSubkey := -1 + + // Iterate the keys to find the newest key + var maxTime time.Time + for i, subkey := range e.Subkeys { + if subkey.Sig.FlagsValid && + subkey.Sig.FlagEncryptCommunications && + subkey.PublicKey.PubKeyAlgo.CanEncrypt() && + !subkey.Sig.KeyExpired(now) && + (maxTime.IsZero() || subkey.Sig.CreationTime.After(maxTime)) { + candidateSubkey = i + maxTime = subkey.Sig.CreationTime + } + } + + if candidateSubkey != -1 { + subkey := e.Subkeys[candidateSubkey] + return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig}, true + } + + // If we don't have any candidate subkeys for encryption and + // the primary key doesn't have any usage metadata then we + // assume that the primary key is ok. Or, if the primary key is + // marked as ok to encrypt to, then we can obviously use it. + i := e.primaryIdentity() + if !i.SelfSignature.FlagsValid || i.SelfSignature.FlagEncryptCommunications && + e.PrimaryKey.PubKeyAlgo.CanEncrypt() && + !i.SelfSignature.KeyExpired(now) { + return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature}, true + } + + // This Entity appears to be signing only. + return Key{}, false +} + +// signingKey return the best candidate Key for signing a message with this +// Entity. +func (e *Entity) signingKey(now time.Time) (Key, bool) { + candidateSubkey := -1 + + for i, subkey := range e.Subkeys { + if subkey.Sig.FlagsValid && + subkey.Sig.FlagSign && + subkey.PublicKey.PubKeyAlgo.CanSign() && + !subkey.Sig.KeyExpired(now) { + candidateSubkey = i + break + } + } + + if candidateSubkey != -1 { + subkey := e.Subkeys[candidateSubkey] + return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig}, true + } + + // If we have no candidate subkey then we assume that it's ok to sign + // with the primary key. + i := e.primaryIdentity() + if !i.SelfSignature.FlagsValid || i.SelfSignature.FlagSign && + !i.SelfSignature.KeyExpired(now) { + return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature}, true + } + + return Key{}, false +} + +// An EntityList contains one or more Entities. +type EntityList []*Entity + +// KeysById returns the set of keys that have the given key id. +func (el EntityList) KeysById(id uint64) (keys []Key) { + for _, e := range el { + if e.PrimaryKey.KeyId == id { + var selfSig *packet.Signature + for _, ident := range e.Identities { + if selfSig == nil { + selfSig = ident.SelfSignature + } else if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId { + selfSig = ident.SelfSignature + break + } + } + keys = append(keys, Key{e, e.PrimaryKey, e.PrivateKey, selfSig}) + } + + for _, subKey := range e.Subkeys { + if subKey.PublicKey.KeyId == id { + keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig}) + } + } + } + return +} + +// KeysByIdAndUsage returns the set of keys with the given id that also meet +// the key usage given by requiredUsage. The requiredUsage is expressed as +// the bitwise-OR of packet.KeyFlag* values. +func (el EntityList) KeysByIdUsage(id uint64, requiredUsage byte) (keys []Key) { + for _, key := range el.KeysById(id) { + if len(key.Entity.Revocations) > 0 { + continue + } + + if key.SelfSignature.RevocationReason != nil { + continue + } + + if key.SelfSignature.FlagsValid && requiredUsage != 0 { + var usage byte + if key.SelfSignature.FlagCertify { + usage |= packet.KeyFlagCertify + } + if key.SelfSignature.FlagSign { + usage |= packet.KeyFlagSign + } + if key.SelfSignature.FlagEncryptCommunications { + usage |= packet.KeyFlagEncryptCommunications + } + if key.SelfSignature.FlagEncryptStorage { + usage |= packet.KeyFlagEncryptStorage + } + if usage&requiredUsage != requiredUsage { + continue + } + } + + keys = append(keys, key) + } + return +} + +// DecryptionKeys returns all private keys that are valid for decryption. +func (el EntityList) DecryptionKeys() (keys []Key) { + for _, e := range el { + for _, subKey := range e.Subkeys { + if subKey.PrivateKey != nil && (!subKey.Sig.FlagsValid || subKey.Sig.FlagEncryptStorage || subKey.Sig.FlagEncryptCommunications) { + keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig}) + } + } + } + return +} + +// ReadArmoredKeyRing reads one or more public/private keys from an armor keyring file. +func ReadArmoredKeyRing(r io.Reader) (EntityList, error) { + block, err := armor.Decode(r) + if err == io.EOF { + return nil, errors.InvalidArgumentError("no armored data found") + } + if err != nil { + return nil, err + } + if block.Type != PublicKeyType && block.Type != PrivateKeyType { + return nil, errors.InvalidArgumentError("expected public or private key block, got: " + block.Type) + } + + return ReadKeyRing(block.Body) +} + +// ReadKeyRing reads one or more public/private keys. Unsupported keys are +// ignored as long as at least a single valid key is found. +func ReadKeyRing(r io.Reader) (el EntityList, err error) { + packets := packet.NewReader(r) + var lastUnsupportedError error + + for { + var e *Entity + e, err = ReadEntity(packets) + if err != nil { + // TODO: warn about skipped unsupported/unreadable keys + if _, ok := err.(errors.UnsupportedError); ok { + lastUnsupportedError = err + err = readToNextPublicKey(packets) + } else if _, ok := err.(errors.StructuralError); ok { + // Skip unreadable, badly-formatted keys + lastUnsupportedError = err + err = readToNextPublicKey(packets) + } + if err == io.EOF { + err = nil + break + } + if err != nil { + el = nil + break + } + } else { + el = append(el, e) + } + } + + if len(el) == 0 && err == nil { + err = lastUnsupportedError + } + return +} + +// readToNextPublicKey reads packets until the start of the entity and leaves +// the first packet of the new entity in the Reader. +func readToNextPublicKey(packets *packet.Reader) (err error) { + var p packet.Packet + for { + p, err = packets.Next() + if err == io.EOF { + return + } else if err != nil { + if _, ok := err.(errors.UnsupportedError); ok { + err = nil + continue + } + return + } + + if pk, ok := p.(*packet.PublicKey); ok && !pk.IsSubkey { + packets.Unread(p) + return + } + } +} + +// ReadEntity reads an entity (public key, identities, subkeys etc) from the +// given Reader. +func ReadEntity(packets *packet.Reader) (*Entity, error) { + e := new(Entity) + e.Identities = make(map[string]*Identity) + + p, err := packets.Next() + if err != nil { + return nil, err + } + + var ok bool + if e.PrimaryKey, ok = p.(*packet.PublicKey); !ok { + if e.PrivateKey, ok = p.(*packet.PrivateKey); !ok { + packets.Unread(p) + return nil, errors.StructuralError("first packet was not a public/private key") + } + e.PrimaryKey = &e.PrivateKey.PublicKey + } + + if !e.PrimaryKey.PubKeyAlgo.CanSign() { + return nil, errors.StructuralError("primary key cannot be used for signatures") + } + + var current *Identity + var revocations []*packet.Signature +EachPacket: + for { + p, err := packets.Next() + if err == io.EOF { + break + } else if err != nil { + return nil, err + } + + switch pkt := p.(type) { + case *packet.UserId: + current = new(Identity) + current.Name = pkt.Id + current.UserId = pkt + e.Identities[pkt.Id] = current + + for { + p, err = packets.Next() + if err == io.EOF { + return nil, io.ErrUnexpectedEOF + } else if err != nil { + return nil, err + } + + sig, ok := p.(*packet.Signature) + if !ok { + return nil, errors.StructuralError("user ID packet not followed by self-signature") + } + + if (sig.SigType == packet.SigTypePositiveCert || sig.SigType == packet.SigTypeGenericCert) && sig.IssuerKeyId != nil && *sig.IssuerKeyId == e.PrimaryKey.KeyId { + if err = e.PrimaryKey.VerifyUserIdSignature(pkt.Id, e.PrimaryKey, sig); err != nil { + return nil, errors.StructuralError("user ID self-signature invalid: " + err.Error()) + } + current.SelfSignature = sig + break + } + current.Signatures = append(current.Signatures, sig) + } + case *packet.Signature: + if pkt.SigType == packet.SigTypeKeyRevocation { + revocations = append(revocations, pkt) + } else if pkt.SigType == packet.SigTypeDirectSignature { + // TODO: RFC4880 5.2.1 permits signatures + // directly on keys (eg. to bind additional + // revocation keys). + } else if current == nil { + return nil, errors.StructuralError("signature packet found before user id packet") + } else { + current.Signatures = append(current.Signatures, pkt) + } + case *packet.PrivateKey: + if pkt.IsSubkey == false { + packets.Unread(p) + break EachPacket + } + err = addSubkey(e, packets, &pkt.PublicKey, pkt) + if err != nil { + return nil, err + } + case *packet.PublicKey: + if pkt.IsSubkey == false { + packets.Unread(p) + break EachPacket + } + err = addSubkey(e, packets, pkt, nil) + if err != nil { + return nil, err + } + default: + // we ignore unknown packets + } + } + + if len(e.Identities) == 0 { + return nil, errors.StructuralError("entity without any identities") + } + + for _, revocation := range revocations { + err = e.PrimaryKey.VerifyRevocationSignature(revocation) + if err == nil { + e.Revocations = append(e.Revocations, revocation) + } else { + // TODO: RFC 4880 5.2.3.15 defines revocation keys. + return nil, errors.StructuralError("revocation signature signed by alternate key") + } + } + + return e, nil +} + +func addSubkey(e *Entity, packets *packet.Reader, pub *packet.PublicKey, priv *packet.PrivateKey) error { + var subKey Subkey + subKey.PublicKey = pub + subKey.PrivateKey = priv + p, err := packets.Next() + if err == io.EOF { + return io.ErrUnexpectedEOF + } + if err != nil { + return errors.StructuralError("subkey signature invalid: " + err.Error()) + } + var ok bool + subKey.Sig, ok = p.(*packet.Signature) + if !ok { + return errors.StructuralError("subkey packet not followed by signature") + } + if subKey.Sig.SigType != packet.SigTypeSubkeyBinding && subKey.Sig.SigType != packet.SigTypeSubkeyRevocation { + return errors.StructuralError("subkey signature with wrong type") + } + err = e.PrimaryKey.VerifyKeySignature(subKey.PublicKey, subKey.Sig) + if err != nil { + return errors.StructuralError("subkey signature invalid: " + err.Error()) + } + e.Subkeys = append(e.Subkeys, subKey) + return nil +} + +const defaultRSAKeyBits = 2048 + +// NewEntity returns an Entity that contains a fresh RSA/RSA keypair with a +// single identity composed of the given full name, comment and email, any of +// which may be empty but must not contain any of "()<>\x00". +// If config is nil, sensible defaults will be used. +func NewEntity(name, comment, email string, config *packet.Config) (*Entity, error) { + currentTime := config.Now() + + bits := defaultRSAKeyBits + if config != nil && config.RSABits != 0 { + bits = config.RSABits + } + + uid := packet.NewUserId(name, comment, email) + if uid == nil { + return nil, errors.InvalidArgumentError("user id field contained invalid characters") + } + signingPriv, err := rsa.GenerateKey(config.Random(), bits) + if err != nil { + return nil, err + } + encryptingPriv, err := rsa.GenerateKey(config.Random(), bits) + if err != nil { + return nil, err + } + + e := &Entity{ + PrimaryKey: packet.NewRSAPublicKey(currentTime, &signingPriv.PublicKey), + PrivateKey: packet.NewRSAPrivateKey(currentTime, signingPriv), + Identities: make(map[string]*Identity), + } + isPrimaryId := true + e.Identities[uid.Id] = &Identity{ + Name: uid.Id, + UserId: uid, + SelfSignature: &packet.Signature{ + CreationTime: currentTime, + SigType: packet.SigTypePositiveCert, + PubKeyAlgo: packet.PubKeyAlgoRSA, + Hash: config.Hash(), + IsPrimaryId: &isPrimaryId, + FlagsValid: true, + FlagSign: true, + FlagCertify: true, + IssuerKeyId: &e.PrimaryKey.KeyId, + }, + } + err = e.Identities[uid.Id].SelfSignature.SignUserId(uid.Id, e.PrimaryKey, e.PrivateKey, config) + if err != nil { + return nil, err + } + + // If the user passes in a DefaultHash via packet.Config, + // set the PreferredHash for the SelfSignature. + if config != nil && config.DefaultHash != 0 { + e.Identities[uid.Id].SelfSignature.PreferredHash = []uint8{hashToHashId(config.DefaultHash)} + } + + // Likewise for DefaultCipher. + if config != nil && config.DefaultCipher != 0 { + e.Identities[uid.Id].SelfSignature.PreferredSymmetric = []uint8{uint8(config.DefaultCipher)} + } + + e.Subkeys = make([]Subkey, 1) + e.Subkeys[0] = Subkey{ + PublicKey: packet.NewRSAPublicKey(currentTime, &encryptingPriv.PublicKey), + PrivateKey: packet.NewRSAPrivateKey(currentTime, encryptingPriv), + Sig: &packet.Signature{ + CreationTime: currentTime, + SigType: packet.SigTypeSubkeyBinding, + PubKeyAlgo: packet.PubKeyAlgoRSA, + Hash: config.Hash(), + FlagsValid: true, + FlagEncryptStorage: true, + FlagEncryptCommunications: true, + IssuerKeyId: &e.PrimaryKey.KeyId, + }, + } + e.Subkeys[0].PublicKey.IsSubkey = true + e.Subkeys[0].PrivateKey.IsSubkey = true + err = e.Subkeys[0].Sig.SignKey(e.Subkeys[0].PublicKey, e.PrivateKey, config) + if err != nil { + return nil, err + } + return e, nil +} + +// SerializePrivate serializes an Entity, including private key material, to +// the given Writer. For now, it must only be used on an Entity returned from +// NewEntity. +// config is ignored +func (e *Entity) SerializePrivate(w io.Writer, config *packet.Config) (err error) { + err = e.PrivateKey.Serialize(w) + if err != nil { + return + } + for _, ident := range e.Identities { + err = ident.UserId.Serialize(w) + if err != nil { + return + } + err = ident.SelfSignature.Serialize(w) + if err != nil { + return + } + } + for _, subkey := range e.Subkeys { + err = subkey.PrivateKey.Serialize(w) + if err != nil { + return + } + err = subkey.Sig.Serialize(w) + if err != nil { + return + } + } + return nil +} + +// Serialize writes the public part of the given Entity to w. (No private +// key material will be output). +func (e *Entity) Serialize(w io.Writer) error { + err := e.PrimaryKey.Serialize(w) + if err != nil { + return err + } + for _, ident := range e.Identities { + err = ident.UserId.Serialize(w) + if err != nil { + return err + } + err = ident.SelfSignature.Serialize(w) + if err != nil { + return err + } + for _, sig := range ident.Signatures { + err = sig.Serialize(w) + if err != nil { + return err + } + } + } + for _, subkey := range e.Subkeys { + err = subkey.PublicKey.Serialize(w) + if err != nil { + return err + } + err = subkey.Sig.Serialize(w) + if err != nil { + return err + } + } + return nil +} + +// SignIdentity adds a signature to e, from signer, attesting that identity is +// associated with e. The provided identity must already be an element of +// e.Identities and the private key of signer must have been decrypted if +// necessary. +// If config is nil, sensible defaults will be used. +func (e *Entity) SignIdentity(identity string, signer *Entity, config *packet.Config) error { + if signer.PrivateKey == nil { + return errors.InvalidArgumentError("signing Entity must have a private key") + } + if signer.PrivateKey.Encrypted { + return errors.InvalidArgumentError("signing Entity's private key must be decrypted") + } + ident, ok := e.Identities[identity] + if !ok { + return errors.InvalidArgumentError("given identity string not found in Entity") + } + + sig := &packet.Signature{ + SigType: packet.SigTypeGenericCert, + PubKeyAlgo: signer.PrivateKey.PubKeyAlgo, + Hash: config.Hash(), + CreationTime: config.Now(), + IssuerKeyId: &signer.PrivateKey.KeyId, + } + if err := sig.SignUserId(identity, e.PrimaryKey, signer.PrivateKey, config); err != nil { + return err + } + ident.Signatures = append(ident.Signatures, sig) + return nil +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/compressed.go b/vendor/golang.org/x/crypto/openpgp/packet/compressed.go new file mode 100644 index 0000000..e8f0b5c --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/compressed.go @@ -0,0 +1,123 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "compress/bzip2" + "compress/flate" + "compress/zlib" + "golang.org/x/crypto/openpgp/errors" + "io" + "strconv" +) + +// Compressed represents a compressed OpenPGP packet. The decompressed contents +// will contain more OpenPGP packets. See RFC 4880, section 5.6. +type Compressed struct { + Body io.Reader +} + +const ( + NoCompression = flate.NoCompression + BestSpeed = flate.BestSpeed + BestCompression = flate.BestCompression + DefaultCompression = flate.DefaultCompression +) + +// CompressionConfig contains compressor configuration settings. +type CompressionConfig struct { + // Level is the compression level to use. It must be set to + // between -1 and 9, with -1 causing the compressor to use the + // default compression level, 0 causing the compressor to use + // no compression and 1 to 9 representing increasing (better, + // slower) compression levels. If Level is less than -1 or + // more then 9, a non-nil error will be returned during + // encryption. See the constants above for convenient common + // settings for Level. + Level int +} + +func (c *Compressed) parse(r io.Reader) error { + var buf [1]byte + _, err := readFull(r, buf[:]) + if err != nil { + return err + } + + switch buf[0] { + case 1: + c.Body = flate.NewReader(r) + case 2: + c.Body, err = zlib.NewReader(r) + case 3: + c.Body = bzip2.NewReader(r) + default: + err = errors.UnsupportedError("unknown compression algorithm: " + strconv.Itoa(int(buf[0]))) + } + + return err +} + +// compressedWriterCloser represents the serialized compression stream +// header and the compressor. Its Close() method ensures that both the +// compressor and serialized stream header are closed. Its Write() +// method writes to the compressor. +type compressedWriteCloser struct { + sh io.Closer // Stream Header + c io.WriteCloser // Compressor +} + +func (cwc compressedWriteCloser) Write(p []byte) (int, error) { + return cwc.c.Write(p) +} + +func (cwc compressedWriteCloser) Close() (err error) { + err = cwc.c.Close() + if err != nil { + return err + } + + return cwc.sh.Close() +} + +// SerializeCompressed serializes a compressed data packet to w and +// returns a WriteCloser to which the literal data packets themselves +// can be written and which MUST be closed on completion. If cc is +// nil, sensible defaults will be used to configure the compression +// algorithm. +func SerializeCompressed(w io.WriteCloser, algo CompressionAlgo, cc *CompressionConfig) (literaldata io.WriteCloser, err error) { + compressed, err := serializeStreamHeader(w, packetTypeCompressed) + if err != nil { + return + } + + _, err = compressed.Write([]byte{uint8(algo)}) + if err != nil { + return + } + + level := DefaultCompression + if cc != nil { + level = cc.Level + } + + var compressor io.WriteCloser + switch algo { + case CompressionZIP: + compressor, err = flate.NewWriter(compressed, level) + case CompressionZLIB: + compressor, err = zlib.NewWriterLevel(compressed, level) + default: + s := strconv.Itoa(int(algo)) + err = errors.UnsupportedError("Unsupported compression algorithm: " + s) + } + if err != nil { + return + } + + literaldata = compressedWriteCloser{compressed, compressor} + + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/config.go b/vendor/golang.org/x/crypto/openpgp/packet/config.go new file mode 100644 index 0000000..c76eecc --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/config.go @@ -0,0 +1,91 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "crypto" + "crypto/rand" + "io" + "time" +) + +// Config collects a number of parameters along with sensible defaults. +// A nil *Config is valid and results in all default values. +type Config struct { + // Rand provides the source of entropy. + // If nil, the crypto/rand Reader is used. + Rand io.Reader + // DefaultHash is the default hash function to be used. + // If zero, SHA-256 is used. + DefaultHash crypto.Hash + // DefaultCipher is the cipher to be used. + // If zero, AES-128 is used. + DefaultCipher CipherFunction + // Time returns the current time as the number of seconds since the + // epoch. If Time is nil, time.Now is used. + Time func() time.Time + // DefaultCompressionAlgo is the compression algorithm to be + // applied to the plaintext before encryption. If zero, no + // compression is done. + DefaultCompressionAlgo CompressionAlgo + // CompressionConfig configures the compression settings. + CompressionConfig *CompressionConfig + // S2KCount is only used for symmetric encryption. It + // determines the strength of the passphrase stretching when + // the said passphrase is hashed to produce a key. S2KCount + // should be between 1024 and 65011712, inclusive. If Config + // is nil or S2KCount is 0, the value 65536 used. Not all + // values in the above range can be represented. S2KCount will + // be rounded up to the next representable value if it cannot + // be encoded exactly. When set, it is strongly encrouraged to + // use a value that is at least 65536. See RFC 4880 Section + // 3.7.1.3. + S2KCount int + // RSABits is the number of bits in new RSA keys made with NewEntity. + // If zero, then 2048 bit keys are created. + RSABits int +} + +func (c *Config) Random() io.Reader { + if c == nil || c.Rand == nil { + return rand.Reader + } + return c.Rand +} + +func (c *Config) Hash() crypto.Hash { + if c == nil || uint(c.DefaultHash) == 0 { + return crypto.SHA256 + } + return c.DefaultHash +} + +func (c *Config) Cipher() CipherFunction { + if c == nil || uint8(c.DefaultCipher) == 0 { + return CipherAES128 + } + return c.DefaultCipher +} + +func (c *Config) Now() time.Time { + if c == nil || c.Time == nil { + return time.Now() + } + return c.Time() +} + +func (c *Config) Compression() CompressionAlgo { + if c == nil { + return CompressionNone + } + return c.DefaultCompressionAlgo +} + +func (c *Config) PasswordHashIterations() int { + if c == nil || c.S2KCount == 0 { + return 0 + } + return c.S2KCount +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go b/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go new file mode 100644 index 0000000..02b372c --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go @@ -0,0 +1,206 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "crypto/rsa" + "encoding/binary" + "io" + "math/big" + "strconv" + + "golang.org/x/crypto/openpgp/elgamal" + "golang.org/x/crypto/openpgp/errors" +) + +const encryptedKeyVersion = 3 + +// EncryptedKey represents a public-key encrypted session key. See RFC 4880, +// section 5.1. +type EncryptedKey struct { + KeyId uint64 + Algo PublicKeyAlgorithm + CipherFunc CipherFunction // only valid after a successful Decrypt + Key []byte // only valid after a successful Decrypt + + encryptedMPI1, encryptedMPI2 parsedMPI +} + +func (e *EncryptedKey) parse(r io.Reader) (err error) { + var buf [10]byte + _, err = readFull(r, buf[:]) + if err != nil { + return + } + if buf[0] != encryptedKeyVersion { + return errors.UnsupportedError("unknown EncryptedKey version " + strconv.Itoa(int(buf[0]))) + } + e.KeyId = binary.BigEndian.Uint64(buf[1:9]) + e.Algo = PublicKeyAlgorithm(buf[9]) + switch e.Algo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly: + e.encryptedMPI1.bytes, e.encryptedMPI1.bitLength, err = readMPI(r) + if err != nil { + return + } + case PubKeyAlgoElGamal: + e.encryptedMPI1.bytes, e.encryptedMPI1.bitLength, err = readMPI(r) + if err != nil { + return + } + e.encryptedMPI2.bytes, e.encryptedMPI2.bitLength, err = readMPI(r) + if err != nil { + return + } + } + _, err = consumeAll(r) + return +} + +func checksumKeyMaterial(key []byte) uint16 { + var checksum uint16 + for _, v := range key { + checksum += uint16(v) + } + return checksum +} + +// Decrypt decrypts an encrypted session key with the given private key. The +// private key must have been decrypted first. +// If config is nil, sensible defaults will be used. +func (e *EncryptedKey) Decrypt(priv *PrivateKey, config *Config) error { + var err error + var b []byte + + // TODO(agl): use session key decryption routines here to avoid + // padding oracle attacks. + switch priv.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly: + k := priv.PrivateKey.(*rsa.PrivateKey) + b, err = rsa.DecryptPKCS1v15(config.Random(), k, padToKeySize(&k.PublicKey, e.encryptedMPI1.bytes)) + case PubKeyAlgoElGamal: + c1 := new(big.Int).SetBytes(e.encryptedMPI1.bytes) + c2 := new(big.Int).SetBytes(e.encryptedMPI2.bytes) + b, err = elgamal.Decrypt(priv.PrivateKey.(*elgamal.PrivateKey), c1, c2) + default: + err = errors.InvalidArgumentError("cannot decrypted encrypted session key with private key of type " + strconv.Itoa(int(priv.PubKeyAlgo))) + } + + if err != nil { + return err + } + + e.CipherFunc = CipherFunction(b[0]) + e.Key = b[1 : len(b)-2] + expectedChecksum := uint16(b[len(b)-2])<<8 | uint16(b[len(b)-1]) + checksum := checksumKeyMaterial(e.Key) + if checksum != expectedChecksum { + return errors.StructuralError("EncryptedKey checksum incorrect") + } + + return nil +} + +// Serialize writes the encrypted key packet, e, to w. +func (e *EncryptedKey) Serialize(w io.Writer) error { + var mpiLen int + switch e.Algo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly: + mpiLen = 2 + len(e.encryptedMPI1.bytes) + case PubKeyAlgoElGamal: + mpiLen = 2 + len(e.encryptedMPI1.bytes) + 2 + len(e.encryptedMPI2.bytes) + default: + return errors.InvalidArgumentError("don't know how to serialize encrypted key type " + strconv.Itoa(int(e.Algo))) + } + + serializeHeader(w, packetTypeEncryptedKey, 1 /* version */ +8 /* key id */ +1 /* algo */ +mpiLen) + + w.Write([]byte{encryptedKeyVersion}) + binary.Write(w, binary.BigEndian, e.KeyId) + w.Write([]byte{byte(e.Algo)}) + + switch e.Algo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly: + writeMPIs(w, e.encryptedMPI1) + case PubKeyAlgoElGamal: + writeMPIs(w, e.encryptedMPI1, e.encryptedMPI2) + default: + panic("internal error") + } + + return nil +} + +// SerializeEncryptedKey serializes an encrypted key packet to w that contains +// key, encrypted to pub. +// If config is nil, sensible defaults will be used. +func SerializeEncryptedKey(w io.Writer, pub *PublicKey, cipherFunc CipherFunction, key []byte, config *Config) error { + var buf [10]byte + buf[0] = encryptedKeyVersion + binary.BigEndian.PutUint64(buf[1:9], pub.KeyId) + buf[9] = byte(pub.PubKeyAlgo) + + keyBlock := make([]byte, 1 /* cipher type */ +len(key)+2 /* checksum */) + keyBlock[0] = byte(cipherFunc) + copy(keyBlock[1:], key) + checksum := checksumKeyMaterial(key) + keyBlock[1+len(key)] = byte(checksum >> 8) + keyBlock[1+len(key)+1] = byte(checksum) + + switch pub.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly: + return serializeEncryptedKeyRSA(w, config.Random(), buf, pub.PublicKey.(*rsa.PublicKey), keyBlock) + case PubKeyAlgoElGamal: + return serializeEncryptedKeyElGamal(w, config.Random(), buf, pub.PublicKey.(*elgamal.PublicKey), keyBlock) + case PubKeyAlgoDSA, PubKeyAlgoRSASignOnly: + return errors.InvalidArgumentError("cannot encrypt to public key of type " + strconv.Itoa(int(pub.PubKeyAlgo))) + } + + return errors.UnsupportedError("encrypting a key to public key of type " + strconv.Itoa(int(pub.PubKeyAlgo))) +} + +func serializeEncryptedKeyRSA(w io.Writer, rand io.Reader, header [10]byte, pub *rsa.PublicKey, keyBlock []byte) error { + cipherText, err := rsa.EncryptPKCS1v15(rand, pub, keyBlock) + if err != nil { + return errors.InvalidArgumentError("RSA encryption failed: " + err.Error()) + } + + packetLen := 10 /* header length */ + 2 /* mpi size */ + len(cipherText) + + err = serializeHeader(w, packetTypeEncryptedKey, packetLen) + if err != nil { + return err + } + _, err = w.Write(header[:]) + if err != nil { + return err + } + return writeMPI(w, 8*uint16(len(cipherText)), cipherText) +} + +func serializeEncryptedKeyElGamal(w io.Writer, rand io.Reader, header [10]byte, pub *elgamal.PublicKey, keyBlock []byte) error { + c1, c2, err := elgamal.Encrypt(rand, pub, keyBlock) + if err != nil { + return errors.InvalidArgumentError("ElGamal encryption failed: " + err.Error()) + } + + packetLen := 10 /* header length */ + packetLen += 2 /* mpi size */ + (c1.BitLen()+7)/8 + packetLen += 2 /* mpi size */ + (c2.BitLen()+7)/8 + + err = serializeHeader(w, packetTypeEncryptedKey, packetLen) + if err != nil { + return err + } + _, err = w.Write(header[:]) + if err != nil { + return err + } + err = writeBig(w, c1) + if err != nil { + return err + } + return writeBig(w, c2) +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/literal.go b/vendor/golang.org/x/crypto/openpgp/packet/literal.go new file mode 100644 index 0000000..1a9ec6e --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/literal.go @@ -0,0 +1,89 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "encoding/binary" + "io" +) + +// LiteralData represents an encrypted file. See RFC 4880, section 5.9. +type LiteralData struct { + IsBinary bool + FileName string + Time uint32 // Unix epoch time. Either creation time or modification time. 0 means undefined. + Body io.Reader +} + +// ForEyesOnly returns whether the contents of the LiteralData have been marked +// as especially sensitive. +func (l *LiteralData) ForEyesOnly() bool { + return l.FileName == "_CONSOLE" +} + +func (l *LiteralData) parse(r io.Reader) (err error) { + var buf [256]byte + + _, err = readFull(r, buf[:2]) + if err != nil { + return + } + + l.IsBinary = buf[0] == 'b' + fileNameLen := int(buf[1]) + + _, err = readFull(r, buf[:fileNameLen]) + if err != nil { + return + } + + l.FileName = string(buf[:fileNameLen]) + + _, err = readFull(r, buf[:4]) + if err != nil { + return + } + + l.Time = binary.BigEndian.Uint32(buf[:4]) + l.Body = r + return +} + +// SerializeLiteral serializes a literal data packet to w and returns a +// WriteCloser to which the data itself can be written and which MUST be closed +// on completion. The fileName is truncated to 255 bytes. +func SerializeLiteral(w io.WriteCloser, isBinary bool, fileName string, time uint32) (plaintext io.WriteCloser, err error) { + var buf [4]byte + buf[0] = 't' + if isBinary { + buf[0] = 'b' + } + if len(fileName) > 255 { + fileName = fileName[:255] + } + buf[1] = byte(len(fileName)) + + inner, err := serializeStreamHeader(w, packetTypeLiteralData) + if err != nil { + return + } + + _, err = inner.Write(buf[:2]) + if err != nil { + return + } + _, err = inner.Write([]byte(fileName)) + if err != nil { + return + } + binary.BigEndian.PutUint32(buf[:], time) + _, err = inner.Write(buf[:]) + if err != nil { + return + } + + plaintext = inner + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/ocfb.go b/vendor/golang.org/x/crypto/openpgp/packet/ocfb.go new file mode 100644 index 0000000..ce2a33a --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/ocfb.go @@ -0,0 +1,143 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// OpenPGP CFB Mode. http://tools.ietf.org/html/rfc4880#section-13.9 + +package packet + +import ( + "crypto/cipher" +) + +type ocfbEncrypter struct { + b cipher.Block + fre []byte + outUsed int +} + +// An OCFBResyncOption determines if the "resynchronization step" of OCFB is +// performed. +type OCFBResyncOption bool + +const ( + OCFBResync OCFBResyncOption = true + OCFBNoResync OCFBResyncOption = false +) + +// NewOCFBEncrypter returns a cipher.Stream which encrypts data with OpenPGP's +// cipher feedback mode using the given cipher.Block, and an initial amount of +// ciphertext. randData must be random bytes and be the same length as the +// cipher.Block's block size. Resync determines if the "resynchronization step" +// from RFC 4880, 13.9 step 7 is performed. Different parts of OpenPGP vary on +// this point. +func NewOCFBEncrypter(block cipher.Block, randData []byte, resync OCFBResyncOption) (cipher.Stream, []byte) { + blockSize := block.BlockSize() + if len(randData) != blockSize { + return nil, nil + } + + x := &ocfbEncrypter{ + b: block, + fre: make([]byte, blockSize), + outUsed: 0, + } + prefix := make([]byte, blockSize+2) + + block.Encrypt(x.fre, x.fre) + for i := 0; i < blockSize; i++ { + prefix[i] = randData[i] ^ x.fre[i] + } + + block.Encrypt(x.fre, prefix[:blockSize]) + prefix[blockSize] = x.fre[0] ^ randData[blockSize-2] + prefix[blockSize+1] = x.fre[1] ^ randData[blockSize-1] + + if resync { + block.Encrypt(x.fre, prefix[2:]) + } else { + x.fre[0] = prefix[blockSize] + x.fre[1] = prefix[blockSize+1] + x.outUsed = 2 + } + return x, prefix +} + +func (x *ocfbEncrypter) XORKeyStream(dst, src []byte) { + for i := 0; i < len(src); i++ { + if x.outUsed == len(x.fre) { + x.b.Encrypt(x.fre, x.fre) + x.outUsed = 0 + } + + x.fre[x.outUsed] ^= src[i] + dst[i] = x.fre[x.outUsed] + x.outUsed++ + } +} + +type ocfbDecrypter struct { + b cipher.Block + fre []byte + outUsed int +} + +// NewOCFBDecrypter returns a cipher.Stream which decrypts data with OpenPGP's +// cipher feedback mode using the given cipher.Block. Prefix must be the first +// blockSize + 2 bytes of the ciphertext, where blockSize is the cipher.Block's +// block size. If an incorrect key is detected then nil is returned. On +// successful exit, blockSize+2 bytes of decrypted data are written into +// prefix. Resync determines if the "resynchronization step" from RFC 4880, +// 13.9 step 7 is performed. Different parts of OpenPGP vary on this point. +func NewOCFBDecrypter(block cipher.Block, prefix []byte, resync OCFBResyncOption) cipher.Stream { + blockSize := block.BlockSize() + if len(prefix) != blockSize+2 { + return nil + } + + x := &ocfbDecrypter{ + b: block, + fre: make([]byte, blockSize), + outUsed: 0, + } + prefixCopy := make([]byte, len(prefix)) + copy(prefixCopy, prefix) + + block.Encrypt(x.fre, x.fre) + for i := 0; i < blockSize; i++ { + prefixCopy[i] ^= x.fre[i] + } + + block.Encrypt(x.fre, prefix[:blockSize]) + prefixCopy[blockSize] ^= x.fre[0] + prefixCopy[blockSize+1] ^= x.fre[1] + + if prefixCopy[blockSize-2] != prefixCopy[blockSize] || + prefixCopy[blockSize-1] != prefixCopy[blockSize+1] { + return nil + } + + if resync { + block.Encrypt(x.fre, prefix[2:]) + } else { + x.fre[0] = prefix[blockSize] + x.fre[1] = prefix[blockSize+1] + x.outUsed = 2 + } + copy(prefix, prefixCopy) + return x +} + +func (x *ocfbDecrypter) XORKeyStream(dst, src []byte) { + for i := 0; i < len(src); i++ { + if x.outUsed == len(x.fre) { + x.b.Encrypt(x.fre, x.fre) + x.outUsed = 0 + } + + c := src[i] + dst[i] = x.fre[x.outUsed] ^ src[i] + x.fre[x.outUsed] = c + x.outUsed++ + } +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go b/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go new file mode 100644 index 0000000..1713503 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go @@ -0,0 +1,73 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "crypto" + "encoding/binary" + "golang.org/x/crypto/openpgp/errors" + "golang.org/x/crypto/openpgp/s2k" + "io" + "strconv" +) + +// OnePassSignature represents a one-pass signature packet. See RFC 4880, +// section 5.4. +type OnePassSignature struct { + SigType SignatureType + Hash crypto.Hash + PubKeyAlgo PublicKeyAlgorithm + KeyId uint64 + IsLast bool +} + +const onePassSignatureVersion = 3 + +func (ops *OnePassSignature) parse(r io.Reader) (err error) { + var buf [13]byte + + _, err = readFull(r, buf[:]) + if err != nil { + return + } + if buf[0] != onePassSignatureVersion { + err = errors.UnsupportedError("one-pass-signature packet version " + strconv.Itoa(int(buf[0]))) + } + + var ok bool + ops.Hash, ok = s2k.HashIdToHash(buf[2]) + if !ok { + return errors.UnsupportedError("hash function: " + strconv.Itoa(int(buf[2]))) + } + + ops.SigType = SignatureType(buf[1]) + ops.PubKeyAlgo = PublicKeyAlgorithm(buf[3]) + ops.KeyId = binary.BigEndian.Uint64(buf[4:12]) + ops.IsLast = buf[12] != 0 + return +} + +// Serialize marshals the given OnePassSignature to w. +func (ops *OnePassSignature) Serialize(w io.Writer) error { + var buf [13]byte + buf[0] = onePassSignatureVersion + buf[1] = uint8(ops.SigType) + var ok bool + buf[2], ok = s2k.HashToHashId(ops.Hash) + if !ok { + return errors.UnsupportedError("hash type: " + strconv.Itoa(int(ops.Hash))) + } + buf[3] = uint8(ops.PubKeyAlgo) + binary.BigEndian.PutUint64(buf[4:12], ops.KeyId) + if ops.IsLast { + buf[12] = 1 + } + + if err := serializeHeader(w, packetTypeOnePassSignature, len(buf)); err != nil { + return err + } + _, err := w.Write(buf[:]) + return err +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/opaque.go b/vendor/golang.org/x/crypto/openpgp/packet/opaque.go new file mode 100644 index 0000000..456d807 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/opaque.go @@ -0,0 +1,162 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "bytes" + "io" + "io/ioutil" + + "golang.org/x/crypto/openpgp/errors" +) + +// OpaquePacket represents an OpenPGP packet as raw, unparsed data. This is +// useful for splitting and storing the original packet contents separately, +// handling unsupported packet types or accessing parts of the packet not yet +// implemented by this package. +type OpaquePacket struct { + // Packet type + Tag uint8 + // Reason why the packet was parsed opaquely + Reason error + // Binary contents of the packet data + Contents []byte +} + +func (op *OpaquePacket) parse(r io.Reader) (err error) { + op.Contents, err = ioutil.ReadAll(r) + return +} + +// Serialize marshals the packet to a writer in its original form, including +// the packet header. +func (op *OpaquePacket) Serialize(w io.Writer) (err error) { + err = serializeHeader(w, packetType(op.Tag), len(op.Contents)) + if err == nil { + _, err = w.Write(op.Contents) + } + return +} + +// Parse attempts to parse the opaque contents into a structure supported by +// this package. If the packet is not known then the result will be another +// OpaquePacket. +func (op *OpaquePacket) Parse() (p Packet, err error) { + hdr := bytes.NewBuffer(nil) + err = serializeHeader(hdr, packetType(op.Tag), len(op.Contents)) + if err != nil { + op.Reason = err + return op, err + } + p, err = Read(io.MultiReader(hdr, bytes.NewBuffer(op.Contents))) + if err != nil { + op.Reason = err + p = op + } + return +} + +// OpaqueReader reads OpaquePackets from an io.Reader. +type OpaqueReader struct { + r io.Reader +} + +func NewOpaqueReader(r io.Reader) *OpaqueReader { + return &OpaqueReader{r: r} +} + +// Read the next OpaquePacket. +func (or *OpaqueReader) Next() (op *OpaquePacket, err error) { + tag, _, contents, err := readHeader(or.r) + if err != nil { + return + } + op = &OpaquePacket{Tag: uint8(tag), Reason: err} + err = op.parse(contents) + if err != nil { + consumeAll(contents) + } + return +} + +// OpaqueSubpacket represents an unparsed OpenPGP subpacket, +// as found in signature and user attribute packets. +type OpaqueSubpacket struct { + SubType uint8 + Contents []byte +} + +// OpaqueSubpackets extracts opaque, unparsed OpenPGP subpackets from +// their byte representation. +func OpaqueSubpackets(contents []byte) (result []*OpaqueSubpacket, err error) { + var ( + subHeaderLen int + subPacket *OpaqueSubpacket + ) + for len(contents) > 0 { + subHeaderLen, subPacket, err = nextSubpacket(contents) + if err != nil { + break + } + result = append(result, subPacket) + contents = contents[subHeaderLen+len(subPacket.Contents):] + } + return +} + +func nextSubpacket(contents []byte) (subHeaderLen int, subPacket *OpaqueSubpacket, err error) { + // RFC 4880, section 5.2.3.1 + var subLen uint32 + if len(contents) < 1 { + goto Truncated + } + subPacket = &OpaqueSubpacket{} + switch { + case contents[0] < 192: + subHeaderLen = 2 // 1 length byte, 1 subtype byte + if len(contents) < subHeaderLen { + goto Truncated + } + subLen = uint32(contents[0]) + contents = contents[1:] + case contents[0] < 255: + subHeaderLen = 3 // 2 length bytes, 1 subtype + if len(contents) < subHeaderLen { + goto Truncated + } + subLen = uint32(contents[0]-192)<<8 + uint32(contents[1]) + 192 + contents = contents[2:] + default: + subHeaderLen = 6 // 5 length bytes, 1 subtype + if len(contents) < subHeaderLen { + goto Truncated + } + subLen = uint32(contents[1])<<24 | + uint32(contents[2])<<16 | + uint32(contents[3])<<8 | + uint32(contents[4]) + contents = contents[5:] + } + if subLen > uint32(len(contents)) || subLen == 0 { + goto Truncated + } + subPacket.SubType = contents[0] + subPacket.Contents = contents[1:subLen] + return +Truncated: + err = errors.StructuralError("subpacket truncated") + return +} + +func (osp *OpaqueSubpacket) Serialize(w io.Writer) (err error) { + buf := make([]byte, 6) + n := serializeSubpacketLength(buf, len(osp.Contents)+1) + buf[n] = osp.SubType + if _, err = w.Write(buf[:n+1]); err != nil { + return + } + _, err = w.Write(osp.Contents) + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/packet.go b/vendor/golang.org/x/crypto/openpgp/packet/packet.go new file mode 100644 index 0000000..625bb5a --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/packet.go @@ -0,0 +1,549 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package packet implements parsing and serialization of OpenPGP packets, as +// specified in RFC 4880. +package packet // import "golang.org/x/crypto/openpgp/packet" + +import ( + "bufio" + "crypto/aes" + "crypto/cipher" + "crypto/des" + "crypto/rsa" + "io" + "math/big" + + "golang.org/x/crypto/cast5" + "golang.org/x/crypto/openpgp/errors" +) + +// readFull is the same as io.ReadFull except that reading zero bytes returns +// ErrUnexpectedEOF rather than EOF. +func readFull(r io.Reader, buf []byte) (n int, err error) { + n, err = io.ReadFull(r, buf) + if err == io.EOF { + err = io.ErrUnexpectedEOF + } + return +} + +// readLength reads an OpenPGP length from r. See RFC 4880, section 4.2.2. +func readLength(r io.Reader) (length int64, isPartial bool, err error) { + var buf [4]byte + _, err = readFull(r, buf[:1]) + if err != nil { + return + } + switch { + case buf[0] < 192: + length = int64(buf[0]) + case buf[0] < 224: + length = int64(buf[0]-192) << 8 + _, err = readFull(r, buf[0:1]) + if err != nil { + return + } + length += int64(buf[0]) + 192 + case buf[0] < 255: + length = int64(1) << (buf[0] & 0x1f) + isPartial = true + default: + _, err = readFull(r, buf[0:4]) + if err != nil { + return + } + length = int64(buf[0])<<24 | + int64(buf[1])<<16 | + int64(buf[2])<<8 | + int64(buf[3]) + } + return +} + +// partialLengthReader wraps an io.Reader and handles OpenPGP partial lengths. +// The continuation lengths are parsed and removed from the stream and EOF is +// returned at the end of the packet. See RFC 4880, section 4.2.2.4. +type partialLengthReader struct { + r io.Reader + remaining int64 + isPartial bool +} + +func (r *partialLengthReader) Read(p []byte) (n int, err error) { + for r.remaining == 0 { + if !r.isPartial { + return 0, io.EOF + } + r.remaining, r.isPartial, err = readLength(r.r) + if err != nil { + return 0, err + } + } + + toRead := int64(len(p)) + if toRead > r.remaining { + toRead = r.remaining + } + + n, err = r.r.Read(p[:int(toRead)]) + r.remaining -= int64(n) + if n < int(toRead) && err == io.EOF { + err = io.ErrUnexpectedEOF + } + return +} + +// partialLengthWriter writes a stream of data using OpenPGP partial lengths. +// See RFC 4880, section 4.2.2.4. +type partialLengthWriter struct { + w io.WriteCloser + lengthByte [1]byte +} + +func (w *partialLengthWriter) Write(p []byte) (n int, err error) { + for len(p) > 0 { + for power := uint(14); power < 32; power-- { + l := 1 << power + if len(p) >= l { + w.lengthByte[0] = 224 + uint8(power) + _, err = w.w.Write(w.lengthByte[:]) + if err != nil { + return + } + var m int + m, err = w.w.Write(p[:l]) + n += m + if err != nil { + return + } + p = p[l:] + break + } + } + } + return +} + +func (w *partialLengthWriter) Close() error { + w.lengthByte[0] = 0 + _, err := w.w.Write(w.lengthByte[:]) + if err != nil { + return err + } + return w.w.Close() +} + +// A spanReader is an io.LimitReader, but it returns ErrUnexpectedEOF if the +// underlying Reader returns EOF before the limit has been reached. +type spanReader struct { + r io.Reader + n int64 +} + +func (l *spanReader) Read(p []byte) (n int, err error) { + if l.n <= 0 { + return 0, io.EOF + } + if int64(len(p)) > l.n { + p = p[0:l.n] + } + n, err = l.r.Read(p) + l.n -= int64(n) + if l.n > 0 && err == io.EOF { + err = io.ErrUnexpectedEOF + } + return +} + +// readHeader parses a packet header and returns an io.Reader which will return +// the contents of the packet. See RFC 4880, section 4.2. +func readHeader(r io.Reader) (tag packetType, length int64, contents io.Reader, err error) { + var buf [4]byte + _, err = io.ReadFull(r, buf[:1]) + if err != nil { + return + } + if buf[0]&0x80 == 0 { + err = errors.StructuralError("tag byte does not have MSB set") + return + } + if buf[0]&0x40 == 0 { + // Old format packet + tag = packetType((buf[0] & 0x3f) >> 2) + lengthType := buf[0] & 3 + if lengthType == 3 { + length = -1 + contents = r + return + } + lengthBytes := 1 << lengthType + _, err = readFull(r, buf[0:lengthBytes]) + if err != nil { + return + } + for i := 0; i < lengthBytes; i++ { + length <<= 8 + length |= int64(buf[i]) + } + contents = &spanReader{r, length} + return + } + + // New format packet + tag = packetType(buf[0] & 0x3f) + length, isPartial, err := readLength(r) + if err != nil { + return + } + if isPartial { + contents = &partialLengthReader{ + remaining: length, + isPartial: true, + r: r, + } + length = -1 + } else { + contents = &spanReader{r, length} + } + return +} + +// serializeHeader writes an OpenPGP packet header to w. See RFC 4880, section +// 4.2. +func serializeHeader(w io.Writer, ptype packetType, length int) (err error) { + var buf [6]byte + var n int + + buf[0] = 0x80 | 0x40 | byte(ptype) + if length < 192 { + buf[1] = byte(length) + n = 2 + } else if length < 8384 { + length -= 192 + buf[1] = 192 + byte(length>>8) + buf[2] = byte(length) + n = 3 + } else { + buf[1] = 255 + buf[2] = byte(length >> 24) + buf[3] = byte(length >> 16) + buf[4] = byte(length >> 8) + buf[5] = byte(length) + n = 6 + } + + _, err = w.Write(buf[:n]) + return +} + +// serializeStreamHeader writes an OpenPGP packet header to w where the +// length of the packet is unknown. It returns a io.WriteCloser which can be +// used to write the contents of the packet. See RFC 4880, section 4.2. +func serializeStreamHeader(w io.WriteCloser, ptype packetType) (out io.WriteCloser, err error) { + var buf [1]byte + buf[0] = 0x80 | 0x40 | byte(ptype) + _, err = w.Write(buf[:]) + if err != nil { + return + } + out = &partialLengthWriter{w: w} + return +} + +// Packet represents an OpenPGP packet. Users are expected to try casting +// instances of this interface to specific packet types. +type Packet interface { + parse(io.Reader) error +} + +// consumeAll reads from the given Reader until error, returning the number of +// bytes read. +func consumeAll(r io.Reader) (n int64, err error) { + var m int + var buf [1024]byte + + for { + m, err = r.Read(buf[:]) + n += int64(m) + if err == io.EOF { + err = nil + return + } + if err != nil { + return + } + } +} + +// packetType represents the numeric ids of the different OpenPGP packet types. See +// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-2 +type packetType uint8 + +const ( + packetTypeEncryptedKey packetType = 1 + packetTypeSignature packetType = 2 + packetTypeSymmetricKeyEncrypted packetType = 3 + packetTypeOnePassSignature packetType = 4 + packetTypePrivateKey packetType = 5 + packetTypePublicKey packetType = 6 + packetTypePrivateSubkey packetType = 7 + packetTypeCompressed packetType = 8 + packetTypeSymmetricallyEncrypted packetType = 9 + packetTypeLiteralData packetType = 11 + packetTypeUserId packetType = 13 + packetTypePublicSubkey packetType = 14 + packetTypeUserAttribute packetType = 17 + packetTypeSymmetricallyEncryptedMDC packetType = 18 +) + +// peekVersion detects the version of a public key packet about to +// be read. A bufio.Reader at the original position of the io.Reader +// is returned. +func peekVersion(r io.Reader) (bufr *bufio.Reader, ver byte, err error) { + bufr = bufio.NewReader(r) + var verBuf []byte + if verBuf, err = bufr.Peek(1); err != nil { + return + } + ver = verBuf[0] + return +} + +// Read reads a single OpenPGP packet from the given io.Reader. If there is an +// error parsing a packet, the whole packet is consumed from the input. +func Read(r io.Reader) (p Packet, err error) { + tag, _, contents, err := readHeader(r) + if err != nil { + return + } + + switch tag { + case packetTypeEncryptedKey: + p = new(EncryptedKey) + case packetTypeSignature: + var version byte + // Detect signature version + if contents, version, err = peekVersion(contents); err != nil { + return + } + if version < 4 { + p = new(SignatureV3) + } else { + p = new(Signature) + } + case packetTypeSymmetricKeyEncrypted: + p = new(SymmetricKeyEncrypted) + case packetTypeOnePassSignature: + p = new(OnePassSignature) + case packetTypePrivateKey, packetTypePrivateSubkey: + pk := new(PrivateKey) + if tag == packetTypePrivateSubkey { + pk.IsSubkey = true + } + p = pk + case packetTypePublicKey, packetTypePublicSubkey: + var version byte + if contents, version, err = peekVersion(contents); err != nil { + return + } + isSubkey := tag == packetTypePublicSubkey + if version < 4 { + p = &PublicKeyV3{IsSubkey: isSubkey} + } else { + p = &PublicKey{IsSubkey: isSubkey} + } + case packetTypeCompressed: + p = new(Compressed) + case packetTypeSymmetricallyEncrypted: + p = new(SymmetricallyEncrypted) + case packetTypeLiteralData: + p = new(LiteralData) + case packetTypeUserId: + p = new(UserId) + case packetTypeUserAttribute: + p = new(UserAttribute) + case packetTypeSymmetricallyEncryptedMDC: + se := new(SymmetricallyEncrypted) + se.MDC = true + p = se + default: + err = errors.UnknownPacketTypeError(tag) + } + if p != nil { + err = p.parse(contents) + } + if err != nil { + consumeAll(contents) + } + return +} + +// SignatureType represents the different semantic meanings of an OpenPGP +// signature. See RFC 4880, section 5.2.1. +type SignatureType uint8 + +const ( + SigTypeBinary SignatureType = 0 + SigTypeText = 1 + SigTypeGenericCert = 0x10 + SigTypePersonaCert = 0x11 + SigTypeCasualCert = 0x12 + SigTypePositiveCert = 0x13 + SigTypeSubkeyBinding = 0x18 + SigTypePrimaryKeyBinding = 0x19 + SigTypeDirectSignature = 0x1F + SigTypeKeyRevocation = 0x20 + SigTypeSubkeyRevocation = 0x28 +) + +// PublicKeyAlgorithm represents the different public key system specified for +// OpenPGP. See +// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-12 +type PublicKeyAlgorithm uint8 + +const ( + PubKeyAlgoRSA PublicKeyAlgorithm = 1 + PubKeyAlgoRSAEncryptOnly PublicKeyAlgorithm = 2 + PubKeyAlgoRSASignOnly PublicKeyAlgorithm = 3 + PubKeyAlgoElGamal PublicKeyAlgorithm = 16 + PubKeyAlgoDSA PublicKeyAlgorithm = 17 + // RFC 6637, Section 5. + PubKeyAlgoECDH PublicKeyAlgorithm = 18 + PubKeyAlgoECDSA PublicKeyAlgorithm = 19 +) + +// CanEncrypt returns true if it's possible to encrypt a message to a public +// key of the given type. +func (pka PublicKeyAlgorithm) CanEncrypt() bool { + switch pka { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoElGamal: + return true + } + return false +} + +// CanSign returns true if it's possible for a public key of the given type to +// sign a message. +func (pka PublicKeyAlgorithm) CanSign() bool { + switch pka { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA: + return true + } + return false +} + +// CipherFunction represents the different block ciphers specified for OpenPGP. See +// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-13 +type CipherFunction uint8 + +const ( + Cipher3DES CipherFunction = 2 + CipherCAST5 CipherFunction = 3 + CipherAES128 CipherFunction = 7 + CipherAES192 CipherFunction = 8 + CipherAES256 CipherFunction = 9 +) + +// KeySize returns the key size, in bytes, of cipher. +func (cipher CipherFunction) KeySize() int { + switch cipher { + case Cipher3DES: + return 24 + case CipherCAST5: + return cast5.KeySize + case CipherAES128: + return 16 + case CipherAES192: + return 24 + case CipherAES256: + return 32 + } + return 0 +} + +// blockSize returns the block size, in bytes, of cipher. +func (cipher CipherFunction) blockSize() int { + switch cipher { + case Cipher3DES: + return des.BlockSize + case CipherCAST5: + return 8 + case CipherAES128, CipherAES192, CipherAES256: + return 16 + } + return 0 +} + +// new returns a fresh instance of the given cipher. +func (cipher CipherFunction) new(key []byte) (block cipher.Block) { + switch cipher { + case Cipher3DES: + block, _ = des.NewTripleDESCipher(key) + case CipherCAST5: + block, _ = cast5.NewCipher(key) + case CipherAES128, CipherAES192, CipherAES256: + block, _ = aes.NewCipher(key) + } + return +} + +// readMPI reads a big integer from r. The bit length returned is the bit +// length that was specified in r. This is preserved so that the integer can be +// reserialized exactly. +func readMPI(r io.Reader) (mpi []byte, bitLength uint16, err error) { + var buf [2]byte + _, err = readFull(r, buf[0:]) + if err != nil { + return + } + bitLength = uint16(buf[0])<<8 | uint16(buf[1]) + numBytes := (int(bitLength) + 7) / 8 + mpi = make([]byte, numBytes) + _, err = readFull(r, mpi) + // According to RFC 4880 3.2. we should check that the MPI has no leading + // zeroes (at least when not an encrypted MPI?), but this implementation + // does generate leading zeroes, so we keep accepting them. + return +} + +// writeMPI serializes a big integer to w. +func writeMPI(w io.Writer, bitLength uint16, mpiBytes []byte) (err error) { + // Note that we can produce leading zeroes, in violation of RFC 4880 3.2. + // Implementations seem to be tolerant of them, and stripping them would + // make it complex to guarantee matching re-serialization. + _, err = w.Write([]byte{byte(bitLength >> 8), byte(bitLength)}) + if err == nil { + _, err = w.Write(mpiBytes) + } + return +} + +// writeBig serializes a *big.Int to w. +func writeBig(w io.Writer, i *big.Int) error { + return writeMPI(w, uint16(i.BitLen()), i.Bytes()) +} + +// padToKeySize left-pads a MPI with zeroes to match the length of the +// specified RSA public. +func padToKeySize(pub *rsa.PublicKey, b []byte) []byte { + k := (pub.N.BitLen() + 7) / 8 + if len(b) >= k { + return b + } + bb := make([]byte, k) + copy(bb[len(bb)-len(b):], b) + return bb +} + +// CompressionAlgo Represents the different compression algorithms +// supported by OpenPGP (except for BZIP2, which is not currently +// supported). See Section 9.3 of RFC 4880. +type CompressionAlgo uint8 + +const ( + CompressionNone CompressionAlgo = 0 + CompressionZIP CompressionAlgo = 1 + CompressionZLIB CompressionAlgo = 2 +) diff --git a/vendor/golang.org/x/crypto/openpgp/packet/private_key.go b/vendor/golang.org/x/crypto/openpgp/packet/private_key.go new file mode 100644 index 0000000..34734cc --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/private_key.go @@ -0,0 +1,380 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "bytes" + "crypto" + "crypto/cipher" + "crypto/dsa" + "crypto/ecdsa" + "crypto/rsa" + "crypto/sha1" + "io" + "io/ioutil" + "math/big" + "strconv" + "time" + + "golang.org/x/crypto/openpgp/elgamal" + "golang.org/x/crypto/openpgp/errors" + "golang.org/x/crypto/openpgp/s2k" +) + +// PrivateKey represents a possibly encrypted private key. See RFC 4880, +// section 5.5.3. +type PrivateKey struct { + PublicKey + Encrypted bool // if true then the private key is unavailable until Decrypt has been called. + encryptedData []byte + cipher CipherFunction + s2k func(out, in []byte) + PrivateKey interface{} // An *{rsa|dsa|ecdsa}.PrivateKey or a crypto.Signer. + sha1Checksum bool + iv []byte +} + +func NewRSAPrivateKey(currentTime time.Time, priv *rsa.PrivateKey) *PrivateKey { + pk := new(PrivateKey) + pk.PublicKey = *NewRSAPublicKey(currentTime, &priv.PublicKey) + pk.PrivateKey = priv + return pk +} + +func NewDSAPrivateKey(currentTime time.Time, priv *dsa.PrivateKey) *PrivateKey { + pk := new(PrivateKey) + pk.PublicKey = *NewDSAPublicKey(currentTime, &priv.PublicKey) + pk.PrivateKey = priv + return pk +} + +func NewElGamalPrivateKey(currentTime time.Time, priv *elgamal.PrivateKey) *PrivateKey { + pk := new(PrivateKey) + pk.PublicKey = *NewElGamalPublicKey(currentTime, &priv.PublicKey) + pk.PrivateKey = priv + return pk +} + +func NewECDSAPrivateKey(currentTime time.Time, priv *ecdsa.PrivateKey) *PrivateKey { + pk := new(PrivateKey) + pk.PublicKey = *NewECDSAPublicKey(currentTime, &priv.PublicKey) + pk.PrivateKey = priv + return pk +} + +// NewSignerPrivateKey creates a sign-only PrivateKey from a crypto.Signer that +// implements RSA or ECDSA. +func NewSignerPrivateKey(currentTime time.Time, signer crypto.Signer) *PrivateKey { + pk := new(PrivateKey) + switch pubkey := signer.Public().(type) { + case rsa.PublicKey: + pk.PublicKey = *NewRSAPublicKey(currentTime, &pubkey) + pk.PubKeyAlgo = PubKeyAlgoRSASignOnly + case ecdsa.PublicKey: + pk.PublicKey = *NewECDSAPublicKey(currentTime, &pubkey) + default: + panic("openpgp: unknown crypto.Signer type in NewSignerPrivateKey") + } + pk.PrivateKey = signer + return pk +} + +func (pk *PrivateKey) parse(r io.Reader) (err error) { + err = (&pk.PublicKey).parse(r) + if err != nil { + return + } + var buf [1]byte + _, err = readFull(r, buf[:]) + if err != nil { + return + } + + s2kType := buf[0] + + switch s2kType { + case 0: + pk.s2k = nil + pk.Encrypted = false + case 254, 255: + _, err = readFull(r, buf[:]) + if err != nil { + return + } + pk.cipher = CipherFunction(buf[0]) + pk.Encrypted = true + pk.s2k, err = s2k.Parse(r) + if err != nil { + return + } + if s2kType == 254 { + pk.sha1Checksum = true + } + default: + return errors.UnsupportedError("deprecated s2k function in private key") + } + + if pk.Encrypted { + blockSize := pk.cipher.blockSize() + if blockSize == 0 { + return errors.UnsupportedError("unsupported cipher in private key: " + strconv.Itoa(int(pk.cipher))) + } + pk.iv = make([]byte, blockSize) + _, err = readFull(r, pk.iv) + if err != nil { + return + } + } + + pk.encryptedData, err = ioutil.ReadAll(r) + if err != nil { + return + } + + if !pk.Encrypted { + return pk.parsePrivateKey(pk.encryptedData) + } + + return +} + +func mod64kHash(d []byte) uint16 { + var h uint16 + for _, b := range d { + h += uint16(b) + } + return h +} + +func (pk *PrivateKey) Serialize(w io.Writer) (err error) { + // TODO(agl): support encrypted private keys + buf := bytes.NewBuffer(nil) + err = pk.PublicKey.serializeWithoutHeaders(buf) + if err != nil { + return + } + buf.WriteByte(0 /* no encryption */) + + privateKeyBuf := bytes.NewBuffer(nil) + + switch priv := pk.PrivateKey.(type) { + case *rsa.PrivateKey: + err = serializeRSAPrivateKey(privateKeyBuf, priv) + case *dsa.PrivateKey: + err = serializeDSAPrivateKey(privateKeyBuf, priv) + case *elgamal.PrivateKey: + err = serializeElGamalPrivateKey(privateKeyBuf, priv) + case *ecdsa.PrivateKey: + err = serializeECDSAPrivateKey(privateKeyBuf, priv) + default: + err = errors.InvalidArgumentError("unknown private key type") + } + if err != nil { + return + } + + ptype := packetTypePrivateKey + contents := buf.Bytes() + privateKeyBytes := privateKeyBuf.Bytes() + if pk.IsSubkey { + ptype = packetTypePrivateSubkey + } + err = serializeHeader(w, ptype, len(contents)+len(privateKeyBytes)+2) + if err != nil { + return + } + _, err = w.Write(contents) + if err != nil { + return + } + _, err = w.Write(privateKeyBytes) + if err != nil { + return + } + + checksum := mod64kHash(privateKeyBytes) + var checksumBytes [2]byte + checksumBytes[0] = byte(checksum >> 8) + checksumBytes[1] = byte(checksum) + _, err = w.Write(checksumBytes[:]) + + return +} + +func serializeRSAPrivateKey(w io.Writer, priv *rsa.PrivateKey) error { + err := writeBig(w, priv.D) + if err != nil { + return err + } + err = writeBig(w, priv.Primes[1]) + if err != nil { + return err + } + err = writeBig(w, priv.Primes[0]) + if err != nil { + return err + } + return writeBig(w, priv.Precomputed.Qinv) +} + +func serializeDSAPrivateKey(w io.Writer, priv *dsa.PrivateKey) error { + return writeBig(w, priv.X) +} + +func serializeElGamalPrivateKey(w io.Writer, priv *elgamal.PrivateKey) error { + return writeBig(w, priv.X) +} + +func serializeECDSAPrivateKey(w io.Writer, priv *ecdsa.PrivateKey) error { + return writeBig(w, priv.D) +} + +// Decrypt decrypts an encrypted private key using a passphrase. +func (pk *PrivateKey) Decrypt(passphrase []byte) error { + if !pk.Encrypted { + return nil + } + + key := make([]byte, pk.cipher.KeySize()) + pk.s2k(key, passphrase) + block := pk.cipher.new(key) + cfb := cipher.NewCFBDecrypter(block, pk.iv) + + data := make([]byte, len(pk.encryptedData)) + cfb.XORKeyStream(data, pk.encryptedData) + + if pk.sha1Checksum { + if len(data) < sha1.Size { + return errors.StructuralError("truncated private key data") + } + h := sha1.New() + h.Write(data[:len(data)-sha1.Size]) + sum := h.Sum(nil) + if !bytes.Equal(sum, data[len(data)-sha1.Size:]) { + return errors.StructuralError("private key checksum failure") + } + data = data[:len(data)-sha1.Size] + } else { + if len(data) < 2 { + return errors.StructuralError("truncated private key data") + } + var sum uint16 + for i := 0; i < len(data)-2; i++ { + sum += uint16(data[i]) + } + if data[len(data)-2] != uint8(sum>>8) || + data[len(data)-1] != uint8(sum) { + return errors.StructuralError("private key checksum failure") + } + data = data[:len(data)-2] + } + + return pk.parsePrivateKey(data) +} + +func (pk *PrivateKey) parsePrivateKey(data []byte) (err error) { + switch pk.PublicKey.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoRSAEncryptOnly: + return pk.parseRSAPrivateKey(data) + case PubKeyAlgoDSA: + return pk.parseDSAPrivateKey(data) + case PubKeyAlgoElGamal: + return pk.parseElGamalPrivateKey(data) + case PubKeyAlgoECDSA: + return pk.parseECDSAPrivateKey(data) + } + panic("impossible") +} + +func (pk *PrivateKey) parseRSAPrivateKey(data []byte) (err error) { + rsaPub := pk.PublicKey.PublicKey.(*rsa.PublicKey) + rsaPriv := new(rsa.PrivateKey) + rsaPriv.PublicKey = *rsaPub + + buf := bytes.NewBuffer(data) + d, _, err := readMPI(buf) + if err != nil { + return + } + p, _, err := readMPI(buf) + if err != nil { + return + } + q, _, err := readMPI(buf) + if err != nil { + return + } + + rsaPriv.D = new(big.Int).SetBytes(d) + rsaPriv.Primes = make([]*big.Int, 2) + rsaPriv.Primes[0] = new(big.Int).SetBytes(p) + rsaPriv.Primes[1] = new(big.Int).SetBytes(q) + if err := rsaPriv.Validate(); err != nil { + return err + } + rsaPriv.Precompute() + pk.PrivateKey = rsaPriv + pk.Encrypted = false + pk.encryptedData = nil + + return nil +} + +func (pk *PrivateKey) parseDSAPrivateKey(data []byte) (err error) { + dsaPub := pk.PublicKey.PublicKey.(*dsa.PublicKey) + dsaPriv := new(dsa.PrivateKey) + dsaPriv.PublicKey = *dsaPub + + buf := bytes.NewBuffer(data) + x, _, err := readMPI(buf) + if err != nil { + return + } + + dsaPriv.X = new(big.Int).SetBytes(x) + pk.PrivateKey = dsaPriv + pk.Encrypted = false + pk.encryptedData = nil + + return nil +} + +func (pk *PrivateKey) parseElGamalPrivateKey(data []byte) (err error) { + pub := pk.PublicKey.PublicKey.(*elgamal.PublicKey) + priv := new(elgamal.PrivateKey) + priv.PublicKey = *pub + + buf := bytes.NewBuffer(data) + x, _, err := readMPI(buf) + if err != nil { + return + } + + priv.X = new(big.Int).SetBytes(x) + pk.PrivateKey = priv + pk.Encrypted = false + pk.encryptedData = nil + + return nil +} + +func (pk *PrivateKey) parseECDSAPrivateKey(data []byte) (err error) { + ecdsaPub := pk.PublicKey.PublicKey.(*ecdsa.PublicKey) + + buf := bytes.NewBuffer(data) + d, _, err := readMPI(buf) + if err != nil { + return + } + + pk.PrivateKey = &ecdsa.PrivateKey{ + PublicKey: *ecdsaPub, + D: new(big.Int).SetBytes(d), + } + pk.Encrypted = false + pk.encryptedData = nil + + return nil +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/public_key.go b/vendor/golang.org/x/crypto/openpgp/packet/public_key.go new file mode 100644 index 0000000..fcd5f52 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/public_key.go @@ -0,0 +1,753 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "bytes" + "crypto" + "crypto/dsa" + "crypto/ecdsa" + "crypto/elliptic" + "crypto/rsa" + "crypto/sha1" + _ "crypto/sha256" + _ "crypto/sha512" + "encoding/binary" + "fmt" + "hash" + "io" + "math/big" + "strconv" + "time" + + "golang.org/x/crypto/openpgp/elgamal" + "golang.org/x/crypto/openpgp/errors" +) + +var ( + // NIST curve P-256 + oidCurveP256 []byte = []byte{0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01, 0x07} + // NIST curve P-384 + oidCurveP384 []byte = []byte{0x2B, 0x81, 0x04, 0x00, 0x22} + // NIST curve P-521 + oidCurveP521 []byte = []byte{0x2B, 0x81, 0x04, 0x00, 0x23} +) + +const maxOIDLength = 8 + +// ecdsaKey stores the algorithm-specific fields for ECDSA keys. +// as defined in RFC 6637, Section 9. +type ecdsaKey struct { + // oid contains the OID byte sequence identifying the elliptic curve used + oid []byte + // p contains the elliptic curve point that represents the public key + p parsedMPI +} + +// parseOID reads the OID for the curve as defined in RFC 6637, Section 9. +func parseOID(r io.Reader) (oid []byte, err error) { + buf := make([]byte, maxOIDLength) + if _, err = readFull(r, buf[:1]); err != nil { + return + } + oidLen := buf[0] + if int(oidLen) > len(buf) { + err = errors.UnsupportedError("invalid oid length: " + strconv.Itoa(int(oidLen))) + return + } + oid = buf[:oidLen] + _, err = readFull(r, oid) + return +} + +func (f *ecdsaKey) parse(r io.Reader) (err error) { + if f.oid, err = parseOID(r); err != nil { + return err + } + f.p.bytes, f.p.bitLength, err = readMPI(r) + return +} + +func (f *ecdsaKey) serialize(w io.Writer) (err error) { + buf := make([]byte, maxOIDLength+1) + buf[0] = byte(len(f.oid)) + copy(buf[1:], f.oid) + if _, err = w.Write(buf[:len(f.oid)+1]); err != nil { + return + } + return writeMPIs(w, f.p) +} + +func (f *ecdsaKey) newECDSA() (*ecdsa.PublicKey, error) { + var c elliptic.Curve + if bytes.Equal(f.oid, oidCurveP256) { + c = elliptic.P256() + } else if bytes.Equal(f.oid, oidCurveP384) { + c = elliptic.P384() + } else if bytes.Equal(f.oid, oidCurveP521) { + c = elliptic.P521() + } else { + return nil, errors.UnsupportedError(fmt.Sprintf("unsupported oid: %x", f.oid)) + } + x, y := elliptic.Unmarshal(c, f.p.bytes) + if x == nil { + return nil, errors.UnsupportedError("failed to parse EC point") + } + return &ecdsa.PublicKey{Curve: c, X: x, Y: y}, nil +} + +func (f *ecdsaKey) byteLen() int { + return 1 + len(f.oid) + 2 + len(f.p.bytes) +} + +type kdfHashFunction byte +type kdfAlgorithm byte + +// ecdhKdf stores key derivation function parameters +// used for ECDH encryption. See RFC 6637, Section 9. +type ecdhKdf struct { + KdfHash kdfHashFunction + KdfAlgo kdfAlgorithm +} + +func (f *ecdhKdf) parse(r io.Reader) (err error) { + buf := make([]byte, 1) + if _, err = readFull(r, buf); err != nil { + return + } + kdfLen := int(buf[0]) + if kdfLen < 3 { + return errors.UnsupportedError("Unsupported ECDH KDF length: " + strconv.Itoa(kdfLen)) + } + buf = make([]byte, kdfLen) + if _, err = readFull(r, buf); err != nil { + return + } + reserved := int(buf[0]) + f.KdfHash = kdfHashFunction(buf[1]) + f.KdfAlgo = kdfAlgorithm(buf[2]) + if reserved != 0x01 { + return errors.UnsupportedError("Unsupported KDF reserved field: " + strconv.Itoa(reserved)) + } + return +} + +func (f *ecdhKdf) serialize(w io.Writer) (err error) { + buf := make([]byte, 4) + // See RFC 6637, Section 9, Algorithm-Specific Fields for ECDH keys. + buf[0] = byte(0x03) // Length of the following fields + buf[1] = byte(0x01) // Reserved for future extensions, must be 1 for now + buf[2] = byte(f.KdfHash) + buf[3] = byte(f.KdfAlgo) + _, err = w.Write(buf[:]) + return +} + +func (f *ecdhKdf) byteLen() int { + return 4 +} + +// PublicKey represents an OpenPGP public key. See RFC 4880, section 5.5.2. +type PublicKey struct { + CreationTime time.Time + PubKeyAlgo PublicKeyAlgorithm + PublicKey interface{} // *rsa.PublicKey, *dsa.PublicKey or *ecdsa.PublicKey + Fingerprint [20]byte + KeyId uint64 + IsSubkey bool + + n, e, p, q, g, y parsedMPI + + // RFC 6637 fields + ec *ecdsaKey + ecdh *ecdhKdf +} + +// signingKey provides a convenient abstraction over signature verification +// for v3 and v4 public keys. +type signingKey interface { + SerializeSignaturePrefix(io.Writer) + serializeWithoutHeaders(io.Writer) error +} + +func fromBig(n *big.Int) parsedMPI { + return parsedMPI{ + bytes: n.Bytes(), + bitLength: uint16(n.BitLen()), + } +} + +// NewRSAPublicKey returns a PublicKey that wraps the given rsa.PublicKey. +func NewRSAPublicKey(creationTime time.Time, pub *rsa.PublicKey) *PublicKey { + pk := &PublicKey{ + CreationTime: creationTime, + PubKeyAlgo: PubKeyAlgoRSA, + PublicKey: pub, + n: fromBig(pub.N), + e: fromBig(big.NewInt(int64(pub.E))), + } + + pk.setFingerPrintAndKeyId() + return pk +} + +// NewDSAPublicKey returns a PublicKey that wraps the given dsa.PublicKey. +func NewDSAPublicKey(creationTime time.Time, pub *dsa.PublicKey) *PublicKey { + pk := &PublicKey{ + CreationTime: creationTime, + PubKeyAlgo: PubKeyAlgoDSA, + PublicKey: pub, + p: fromBig(pub.P), + q: fromBig(pub.Q), + g: fromBig(pub.G), + y: fromBig(pub.Y), + } + + pk.setFingerPrintAndKeyId() + return pk +} + +// NewElGamalPublicKey returns a PublicKey that wraps the given elgamal.PublicKey. +func NewElGamalPublicKey(creationTime time.Time, pub *elgamal.PublicKey) *PublicKey { + pk := &PublicKey{ + CreationTime: creationTime, + PubKeyAlgo: PubKeyAlgoElGamal, + PublicKey: pub, + p: fromBig(pub.P), + g: fromBig(pub.G), + y: fromBig(pub.Y), + } + + pk.setFingerPrintAndKeyId() + return pk +} + +func NewECDSAPublicKey(creationTime time.Time, pub *ecdsa.PublicKey) *PublicKey { + pk := &PublicKey{ + CreationTime: creationTime, + PubKeyAlgo: PubKeyAlgoECDSA, + PublicKey: pub, + ec: new(ecdsaKey), + } + + switch pub.Curve { + case elliptic.P256(): + pk.ec.oid = oidCurveP256 + case elliptic.P384(): + pk.ec.oid = oidCurveP384 + case elliptic.P521(): + pk.ec.oid = oidCurveP521 + default: + panic("unknown elliptic curve") + } + + pk.ec.p.bytes = elliptic.Marshal(pub.Curve, pub.X, pub.Y) + + // The bit length is 3 (for the 0x04 specifying an uncompressed key) + // plus two field elements (for x and y), which are rounded up to the + // nearest byte. See https://tools.ietf.org/html/rfc6637#section-6 + fieldBytes := (pub.Curve.Params().BitSize + 7) & ^7 + pk.ec.p.bitLength = uint16(3 + fieldBytes + fieldBytes) + + pk.setFingerPrintAndKeyId() + return pk +} + +func (pk *PublicKey) parse(r io.Reader) (err error) { + // RFC 4880, section 5.5.2 + var buf [6]byte + _, err = readFull(r, buf[:]) + if err != nil { + return + } + if buf[0] != 4 { + return errors.UnsupportedError("public key version") + } + pk.CreationTime = time.Unix(int64(uint32(buf[1])<<24|uint32(buf[2])<<16|uint32(buf[3])<<8|uint32(buf[4])), 0) + pk.PubKeyAlgo = PublicKeyAlgorithm(buf[5]) + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + err = pk.parseRSA(r) + case PubKeyAlgoDSA: + err = pk.parseDSA(r) + case PubKeyAlgoElGamal: + err = pk.parseElGamal(r) + case PubKeyAlgoECDSA: + pk.ec = new(ecdsaKey) + if err = pk.ec.parse(r); err != nil { + return err + } + pk.PublicKey, err = pk.ec.newECDSA() + case PubKeyAlgoECDH: + pk.ec = new(ecdsaKey) + if err = pk.ec.parse(r); err != nil { + return + } + pk.ecdh = new(ecdhKdf) + if err = pk.ecdh.parse(r); err != nil { + return + } + // The ECDH key is stored in an ecdsa.PublicKey for convenience. + pk.PublicKey, err = pk.ec.newECDSA() + default: + err = errors.UnsupportedError("public key type: " + strconv.Itoa(int(pk.PubKeyAlgo))) + } + if err != nil { + return + } + + pk.setFingerPrintAndKeyId() + return +} + +func (pk *PublicKey) setFingerPrintAndKeyId() { + // RFC 4880, section 12.2 + fingerPrint := sha1.New() + pk.SerializeSignaturePrefix(fingerPrint) + pk.serializeWithoutHeaders(fingerPrint) + copy(pk.Fingerprint[:], fingerPrint.Sum(nil)) + pk.KeyId = binary.BigEndian.Uint64(pk.Fingerprint[12:20]) +} + +// parseRSA parses RSA public key material from the given Reader. See RFC 4880, +// section 5.5.2. +func (pk *PublicKey) parseRSA(r io.Reader) (err error) { + pk.n.bytes, pk.n.bitLength, err = readMPI(r) + if err != nil { + return + } + pk.e.bytes, pk.e.bitLength, err = readMPI(r) + if err != nil { + return + } + + if len(pk.e.bytes) > 3 { + err = errors.UnsupportedError("large public exponent") + return + } + rsa := &rsa.PublicKey{ + N: new(big.Int).SetBytes(pk.n.bytes), + E: 0, + } + for i := 0; i < len(pk.e.bytes); i++ { + rsa.E <<= 8 + rsa.E |= int(pk.e.bytes[i]) + } + pk.PublicKey = rsa + return +} + +// parseDSA parses DSA public key material from the given Reader. See RFC 4880, +// section 5.5.2. +func (pk *PublicKey) parseDSA(r io.Reader) (err error) { + pk.p.bytes, pk.p.bitLength, err = readMPI(r) + if err != nil { + return + } + pk.q.bytes, pk.q.bitLength, err = readMPI(r) + if err != nil { + return + } + pk.g.bytes, pk.g.bitLength, err = readMPI(r) + if err != nil { + return + } + pk.y.bytes, pk.y.bitLength, err = readMPI(r) + if err != nil { + return + } + + dsa := new(dsa.PublicKey) + dsa.P = new(big.Int).SetBytes(pk.p.bytes) + dsa.Q = new(big.Int).SetBytes(pk.q.bytes) + dsa.G = new(big.Int).SetBytes(pk.g.bytes) + dsa.Y = new(big.Int).SetBytes(pk.y.bytes) + pk.PublicKey = dsa + return +} + +// parseElGamal parses ElGamal public key material from the given Reader. See +// RFC 4880, section 5.5.2. +func (pk *PublicKey) parseElGamal(r io.Reader) (err error) { + pk.p.bytes, pk.p.bitLength, err = readMPI(r) + if err != nil { + return + } + pk.g.bytes, pk.g.bitLength, err = readMPI(r) + if err != nil { + return + } + pk.y.bytes, pk.y.bitLength, err = readMPI(r) + if err != nil { + return + } + + elgamal := new(elgamal.PublicKey) + elgamal.P = new(big.Int).SetBytes(pk.p.bytes) + elgamal.G = new(big.Int).SetBytes(pk.g.bytes) + elgamal.Y = new(big.Int).SetBytes(pk.y.bytes) + pk.PublicKey = elgamal + return +} + +// SerializeSignaturePrefix writes the prefix for this public key to the given Writer. +// The prefix is used when calculating a signature over this public key. See +// RFC 4880, section 5.2.4. +func (pk *PublicKey) SerializeSignaturePrefix(h io.Writer) { + var pLength uint16 + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + pLength += 2 + uint16(len(pk.n.bytes)) + pLength += 2 + uint16(len(pk.e.bytes)) + case PubKeyAlgoDSA: + pLength += 2 + uint16(len(pk.p.bytes)) + pLength += 2 + uint16(len(pk.q.bytes)) + pLength += 2 + uint16(len(pk.g.bytes)) + pLength += 2 + uint16(len(pk.y.bytes)) + case PubKeyAlgoElGamal: + pLength += 2 + uint16(len(pk.p.bytes)) + pLength += 2 + uint16(len(pk.g.bytes)) + pLength += 2 + uint16(len(pk.y.bytes)) + case PubKeyAlgoECDSA: + pLength += uint16(pk.ec.byteLen()) + case PubKeyAlgoECDH: + pLength += uint16(pk.ec.byteLen()) + pLength += uint16(pk.ecdh.byteLen()) + default: + panic("unknown public key algorithm") + } + pLength += 6 + h.Write([]byte{0x99, byte(pLength >> 8), byte(pLength)}) + return +} + +func (pk *PublicKey) Serialize(w io.Writer) (err error) { + length := 6 // 6 byte header + + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + length += 2 + len(pk.n.bytes) + length += 2 + len(pk.e.bytes) + case PubKeyAlgoDSA: + length += 2 + len(pk.p.bytes) + length += 2 + len(pk.q.bytes) + length += 2 + len(pk.g.bytes) + length += 2 + len(pk.y.bytes) + case PubKeyAlgoElGamal: + length += 2 + len(pk.p.bytes) + length += 2 + len(pk.g.bytes) + length += 2 + len(pk.y.bytes) + case PubKeyAlgoECDSA: + length += pk.ec.byteLen() + case PubKeyAlgoECDH: + length += pk.ec.byteLen() + length += pk.ecdh.byteLen() + default: + panic("unknown public key algorithm") + } + + packetType := packetTypePublicKey + if pk.IsSubkey { + packetType = packetTypePublicSubkey + } + err = serializeHeader(w, packetType, length) + if err != nil { + return + } + return pk.serializeWithoutHeaders(w) +} + +// serializeWithoutHeaders marshals the PublicKey to w in the form of an +// OpenPGP public key packet, not including the packet header. +func (pk *PublicKey) serializeWithoutHeaders(w io.Writer) (err error) { + var buf [6]byte + buf[0] = 4 + t := uint32(pk.CreationTime.Unix()) + buf[1] = byte(t >> 24) + buf[2] = byte(t >> 16) + buf[3] = byte(t >> 8) + buf[4] = byte(t) + buf[5] = byte(pk.PubKeyAlgo) + + _, err = w.Write(buf[:]) + if err != nil { + return + } + + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + return writeMPIs(w, pk.n, pk.e) + case PubKeyAlgoDSA: + return writeMPIs(w, pk.p, pk.q, pk.g, pk.y) + case PubKeyAlgoElGamal: + return writeMPIs(w, pk.p, pk.g, pk.y) + case PubKeyAlgoECDSA: + return pk.ec.serialize(w) + case PubKeyAlgoECDH: + if err = pk.ec.serialize(w); err != nil { + return + } + return pk.ecdh.serialize(w) + } + return errors.InvalidArgumentError("bad public-key algorithm") +} + +// CanSign returns true iff this public key can generate signatures +func (pk *PublicKey) CanSign() bool { + return pk.PubKeyAlgo != PubKeyAlgoRSAEncryptOnly && pk.PubKeyAlgo != PubKeyAlgoElGamal +} + +// VerifySignature returns nil iff sig is a valid signature, made by this +// public key, of the data hashed into signed. signed is mutated by this call. +func (pk *PublicKey) VerifySignature(signed hash.Hash, sig *Signature) (err error) { + if !pk.CanSign() { + return errors.InvalidArgumentError("public key cannot generate signatures") + } + + signed.Write(sig.HashSuffix) + hashBytes := signed.Sum(nil) + + if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] { + return errors.SignatureError("hash tag doesn't match") + } + + if pk.PubKeyAlgo != sig.PubKeyAlgo { + return errors.InvalidArgumentError("public key and signature use different algorithms") + } + + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + rsaPublicKey, _ := pk.PublicKey.(*rsa.PublicKey) + err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, padToKeySize(rsaPublicKey, sig.RSASignature.bytes)) + if err != nil { + return errors.SignatureError("RSA verification failure") + } + return nil + case PubKeyAlgoDSA: + dsaPublicKey, _ := pk.PublicKey.(*dsa.PublicKey) + // Need to truncate hashBytes to match FIPS 186-3 section 4.6. + subgroupSize := (dsaPublicKey.Q.BitLen() + 7) / 8 + if len(hashBytes) > subgroupSize { + hashBytes = hashBytes[:subgroupSize] + } + if !dsa.Verify(dsaPublicKey, hashBytes, new(big.Int).SetBytes(sig.DSASigR.bytes), new(big.Int).SetBytes(sig.DSASigS.bytes)) { + return errors.SignatureError("DSA verification failure") + } + return nil + case PubKeyAlgoECDSA: + ecdsaPublicKey := pk.PublicKey.(*ecdsa.PublicKey) + if !ecdsa.Verify(ecdsaPublicKey, hashBytes, new(big.Int).SetBytes(sig.ECDSASigR.bytes), new(big.Int).SetBytes(sig.ECDSASigS.bytes)) { + return errors.SignatureError("ECDSA verification failure") + } + return nil + default: + return errors.SignatureError("Unsupported public key algorithm used in signature") + } +} + +// VerifySignatureV3 returns nil iff sig is a valid signature, made by this +// public key, of the data hashed into signed. signed is mutated by this call. +func (pk *PublicKey) VerifySignatureV3(signed hash.Hash, sig *SignatureV3) (err error) { + if !pk.CanSign() { + return errors.InvalidArgumentError("public key cannot generate signatures") + } + + suffix := make([]byte, 5) + suffix[0] = byte(sig.SigType) + binary.BigEndian.PutUint32(suffix[1:], uint32(sig.CreationTime.Unix())) + signed.Write(suffix) + hashBytes := signed.Sum(nil) + + if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] { + return errors.SignatureError("hash tag doesn't match") + } + + if pk.PubKeyAlgo != sig.PubKeyAlgo { + return errors.InvalidArgumentError("public key and signature use different algorithms") + } + + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + rsaPublicKey := pk.PublicKey.(*rsa.PublicKey) + if err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, padToKeySize(rsaPublicKey, sig.RSASignature.bytes)); err != nil { + return errors.SignatureError("RSA verification failure") + } + return + case PubKeyAlgoDSA: + dsaPublicKey := pk.PublicKey.(*dsa.PublicKey) + // Need to truncate hashBytes to match FIPS 186-3 section 4.6. + subgroupSize := (dsaPublicKey.Q.BitLen() + 7) / 8 + if len(hashBytes) > subgroupSize { + hashBytes = hashBytes[:subgroupSize] + } + if !dsa.Verify(dsaPublicKey, hashBytes, new(big.Int).SetBytes(sig.DSASigR.bytes), new(big.Int).SetBytes(sig.DSASigS.bytes)) { + return errors.SignatureError("DSA verification failure") + } + return nil + default: + panic("shouldn't happen") + } +} + +// keySignatureHash returns a Hash of the message that needs to be signed for +// pk to assert a subkey relationship to signed. +func keySignatureHash(pk, signed signingKey, hashFunc crypto.Hash) (h hash.Hash, err error) { + if !hashFunc.Available() { + return nil, errors.UnsupportedError("hash function") + } + h = hashFunc.New() + + // RFC 4880, section 5.2.4 + pk.SerializeSignaturePrefix(h) + pk.serializeWithoutHeaders(h) + signed.SerializeSignaturePrefix(h) + signed.serializeWithoutHeaders(h) + return +} + +// VerifyKeySignature returns nil iff sig is a valid signature, made by this +// public key, of signed. +func (pk *PublicKey) VerifyKeySignature(signed *PublicKey, sig *Signature) error { + h, err := keySignatureHash(pk, signed, sig.Hash) + if err != nil { + return err + } + if err = pk.VerifySignature(h, sig); err != nil { + return err + } + + if sig.FlagSign { + // Signing subkeys must be cross-signed. See + // https://www.gnupg.org/faq/subkey-cross-certify.html. + if sig.EmbeddedSignature == nil { + return errors.StructuralError("signing subkey is missing cross-signature") + } + // Verify the cross-signature. This is calculated over the same + // data as the main signature, so we cannot just recursively + // call signed.VerifyKeySignature(...) + if h, err = keySignatureHash(pk, signed, sig.EmbeddedSignature.Hash); err != nil { + return errors.StructuralError("error while hashing for cross-signature: " + err.Error()) + } + if err := signed.VerifySignature(h, sig.EmbeddedSignature); err != nil { + return errors.StructuralError("error while verifying cross-signature: " + err.Error()) + } + } + + return nil +} + +func keyRevocationHash(pk signingKey, hashFunc crypto.Hash) (h hash.Hash, err error) { + if !hashFunc.Available() { + return nil, errors.UnsupportedError("hash function") + } + h = hashFunc.New() + + // RFC 4880, section 5.2.4 + pk.SerializeSignaturePrefix(h) + pk.serializeWithoutHeaders(h) + + return +} + +// VerifyRevocationSignature returns nil iff sig is a valid signature, made by this +// public key. +func (pk *PublicKey) VerifyRevocationSignature(sig *Signature) (err error) { + h, err := keyRevocationHash(pk, sig.Hash) + if err != nil { + return err + } + return pk.VerifySignature(h, sig) +} + +// userIdSignatureHash returns a Hash of the message that needs to be signed +// to assert that pk is a valid key for id. +func userIdSignatureHash(id string, pk *PublicKey, hashFunc crypto.Hash) (h hash.Hash, err error) { + if !hashFunc.Available() { + return nil, errors.UnsupportedError("hash function") + } + h = hashFunc.New() + + // RFC 4880, section 5.2.4 + pk.SerializeSignaturePrefix(h) + pk.serializeWithoutHeaders(h) + + var buf [5]byte + buf[0] = 0xb4 + buf[1] = byte(len(id) >> 24) + buf[2] = byte(len(id) >> 16) + buf[3] = byte(len(id) >> 8) + buf[4] = byte(len(id)) + h.Write(buf[:]) + h.Write([]byte(id)) + + return +} + +// VerifyUserIdSignature returns nil iff sig is a valid signature, made by this +// public key, that id is the identity of pub. +func (pk *PublicKey) VerifyUserIdSignature(id string, pub *PublicKey, sig *Signature) (err error) { + h, err := userIdSignatureHash(id, pub, sig.Hash) + if err != nil { + return err + } + return pk.VerifySignature(h, sig) +} + +// VerifyUserIdSignatureV3 returns nil iff sig is a valid signature, made by this +// public key, that id is the identity of pub. +func (pk *PublicKey) VerifyUserIdSignatureV3(id string, pub *PublicKey, sig *SignatureV3) (err error) { + h, err := userIdSignatureV3Hash(id, pub, sig.Hash) + if err != nil { + return err + } + return pk.VerifySignatureV3(h, sig) +} + +// KeyIdString returns the public key's fingerprint in capital hex +// (e.g. "6C7EE1B8621CC013"). +func (pk *PublicKey) KeyIdString() string { + return fmt.Sprintf("%X", pk.Fingerprint[12:20]) +} + +// KeyIdShortString returns the short form of public key's fingerprint +// in capital hex, as shown by gpg --list-keys (e.g. "621CC013"). +func (pk *PublicKey) KeyIdShortString() string { + return fmt.Sprintf("%X", pk.Fingerprint[16:20]) +} + +// A parsedMPI is used to store the contents of a big integer, along with the +// bit length that was specified in the original input. This allows the MPI to +// be reserialized exactly. +type parsedMPI struct { + bytes []byte + bitLength uint16 +} + +// writeMPIs is a utility function for serializing several big integers to the +// given Writer. +func writeMPIs(w io.Writer, mpis ...parsedMPI) (err error) { + for _, mpi := range mpis { + err = writeMPI(w, mpi.bitLength, mpi.bytes) + if err != nil { + return + } + } + return +} + +// BitLength returns the bit length for the given public key. +func (pk *PublicKey) BitLength() (bitLength uint16, err error) { + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + bitLength = pk.n.bitLength + case PubKeyAlgoDSA: + bitLength = pk.p.bitLength + case PubKeyAlgoElGamal: + bitLength = pk.p.bitLength + default: + err = errors.InvalidArgumentError("bad public-key algorithm") + } + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go b/vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go new file mode 100644 index 0000000..5daf7b6 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go @@ -0,0 +1,279 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "crypto" + "crypto/md5" + "crypto/rsa" + "encoding/binary" + "fmt" + "hash" + "io" + "math/big" + "strconv" + "time" + + "golang.org/x/crypto/openpgp/errors" +) + +// PublicKeyV3 represents older, version 3 public keys. These keys are less secure and +// should not be used for signing or encrypting. They are supported here only for +// parsing version 3 key material and validating signatures. +// See RFC 4880, section 5.5.2. +type PublicKeyV3 struct { + CreationTime time.Time + DaysToExpire uint16 + PubKeyAlgo PublicKeyAlgorithm + PublicKey *rsa.PublicKey + Fingerprint [16]byte + KeyId uint64 + IsSubkey bool + + n, e parsedMPI +} + +// newRSAPublicKeyV3 returns a PublicKey that wraps the given rsa.PublicKey. +// Included here for testing purposes only. RFC 4880, section 5.5.2: +// "an implementation MUST NOT generate a V3 key, but MAY accept it." +func newRSAPublicKeyV3(creationTime time.Time, pub *rsa.PublicKey) *PublicKeyV3 { + pk := &PublicKeyV3{ + CreationTime: creationTime, + PublicKey: pub, + n: fromBig(pub.N), + e: fromBig(big.NewInt(int64(pub.E))), + } + + pk.setFingerPrintAndKeyId() + return pk +} + +func (pk *PublicKeyV3) parse(r io.Reader) (err error) { + // RFC 4880, section 5.5.2 + var buf [8]byte + if _, err = readFull(r, buf[:]); err != nil { + return + } + if buf[0] < 2 || buf[0] > 3 { + return errors.UnsupportedError("public key version") + } + pk.CreationTime = time.Unix(int64(uint32(buf[1])<<24|uint32(buf[2])<<16|uint32(buf[3])<<8|uint32(buf[4])), 0) + pk.DaysToExpire = binary.BigEndian.Uint16(buf[5:7]) + pk.PubKeyAlgo = PublicKeyAlgorithm(buf[7]) + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + err = pk.parseRSA(r) + default: + err = errors.UnsupportedError("public key type: " + strconv.Itoa(int(pk.PubKeyAlgo))) + } + if err != nil { + return + } + + pk.setFingerPrintAndKeyId() + return +} + +func (pk *PublicKeyV3) setFingerPrintAndKeyId() { + // RFC 4880, section 12.2 + fingerPrint := md5.New() + fingerPrint.Write(pk.n.bytes) + fingerPrint.Write(pk.e.bytes) + fingerPrint.Sum(pk.Fingerprint[:0]) + pk.KeyId = binary.BigEndian.Uint64(pk.n.bytes[len(pk.n.bytes)-8:]) +} + +// parseRSA parses RSA public key material from the given Reader. See RFC 4880, +// section 5.5.2. +func (pk *PublicKeyV3) parseRSA(r io.Reader) (err error) { + if pk.n.bytes, pk.n.bitLength, err = readMPI(r); err != nil { + return + } + if pk.e.bytes, pk.e.bitLength, err = readMPI(r); err != nil { + return + } + + // RFC 4880 Section 12.2 requires the low 8 bytes of the + // modulus to form the key id. + if len(pk.n.bytes) < 8 { + return errors.StructuralError("v3 public key modulus is too short") + } + if len(pk.e.bytes) > 3 { + err = errors.UnsupportedError("large public exponent") + return + } + rsa := &rsa.PublicKey{N: new(big.Int).SetBytes(pk.n.bytes)} + for i := 0; i < len(pk.e.bytes); i++ { + rsa.E <<= 8 + rsa.E |= int(pk.e.bytes[i]) + } + pk.PublicKey = rsa + return +} + +// SerializeSignaturePrefix writes the prefix for this public key to the given Writer. +// The prefix is used when calculating a signature over this public key. See +// RFC 4880, section 5.2.4. +func (pk *PublicKeyV3) SerializeSignaturePrefix(w io.Writer) { + var pLength uint16 + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + pLength += 2 + uint16(len(pk.n.bytes)) + pLength += 2 + uint16(len(pk.e.bytes)) + default: + panic("unknown public key algorithm") + } + pLength += 6 + w.Write([]byte{0x99, byte(pLength >> 8), byte(pLength)}) + return +} + +func (pk *PublicKeyV3) Serialize(w io.Writer) (err error) { + length := 8 // 8 byte header + + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + length += 2 + len(pk.n.bytes) + length += 2 + len(pk.e.bytes) + default: + panic("unknown public key algorithm") + } + + packetType := packetTypePublicKey + if pk.IsSubkey { + packetType = packetTypePublicSubkey + } + if err = serializeHeader(w, packetType, length); err != nil { + return + } + return pk.serializeWithoutHeaders(w) +} + +// serializeWithoutHeaders marshals the PublicKey to w in the form of an +// OpenPGP public key packet, not including the packet header. +func (pk *PublicKeyV3) serializeWithoutHeaders(w io.Writer) (err error) { + var buf [8]byte + // Version 3 + buf[0] = 3 + // Creation time + t := uint32(pk.CreationTime.Unix()) + buf[1] = byte(t >> 24) + buf[2] = byte(t >> 16) + buf[3] = byte(t >> 8) + buf[4] = byte(t) + // Days to expire + buf[5] = byte(pk.DaysToExpire >> 8) + buf[6] = byte(pk.DaysToExpire) + // Public key algorithm + buf[7] = byte(pk.PubKeyAlgo) + + if _, err = w.Write(buf[:]); err != nil { + return + } + + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + return writeMPIs(w, pk.n, pk.e) + } + return errors.InvalidArgumentError("bad public-key algorithm") +} + +// CanSign returns true iff this public key can generate signatures +func (pk *PublicKeyV3) CanSign() bool { + return pk.PubKeyAlgo != PubKeyAlgoRSAEncryptOnly +} + +// VerifySignatureV3 returns nil iff sig is a valid signature, made by this +// public key, of the data hashed into signed. signed is mutated by this call. +func (pk *PublicKeyV3) VerifySignatureV3(signed hash.Hash, sig *SignatureV3) (err error) { + if !pk.CanSign() { + return errors.InvalidArgumentError("public key cannot generate signatures") + } + + suffix := make([]byte, 5) + suffix[0] = byte(sig.SigType) + binary.BigEndian.PutUint32(suffix[1:], uint32(sig.CreationTime.Unix())) + signed.Write(suffix) + hashBytes := signed.Sum(nil) + + if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] { + return errors.SignatureError("hash tag doesn't match") + } + + if pk.PubKeyAlgo != sig.PubKeyAlgo { + return errors.InvalidArgumentError("public key and signature use different algorithms") + } + + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + if err = rsa.VerifyPKCS1v15(pk.PublicKey, sig.Hash, hashBytes, sig.RSASignature.bytes); err != nil { + return errors.SignatureError("RSA verification failure") + } + return + default: + // V3 public keys only support RSA. + panic("shouldn't happen") + } +} + +// VerifyUserIdSignatureV3 returns nil iff sig is a valid signature, made by this +// public key, that id is the identity of pub. +func (pk *PublicKeyV3) VerifyUserIdSignatureV3(id string, pub *PublicKeyV3, sig *SignatureV3) (err error) { + h, err := userIdSignatureV3Hash(id, pk, sig.Hash) + if err != nil { + return err + } + return pk.VerifySignatureV3(h, sig) +} + +// VerifyKeySignatureV3 returns nil iff sig is a valid signature, made by this +// public key, of signed. +func (pk *PublicKeyV3) VerifyKeySignatureV3(signed *PublicKeyV3, sig *SignatureV3) (err error) { + h, err := keySignatureHash(pk, signed, sig.Hash) + if err != nil { + return err + } + return pk.VerifySignatureV3(h, sig) +} + +// userIdSignatureV3Hash returns a Hash of the message that needs to be signed +// to assert that pk is a valid key for id. +func userIdSignatureV3Hash(id string, pk signingKey, hfn crypto.Hash) (h hash.Hash, err error) { + if !hfn.Available() { + return nil, errors.UnsupportedError("hash function") + } + h = hfn.New() + + // RFC 4880, section 5.2.4 + pk.SerializeSignaturePrefix(h) + pk.serializeWithoutHeaders(h) + + h.Write([]byte(id)) + + return +} + +// KeyIdString returns the public key's fingerprint in capital hex +// (e.g. "6C7EE1B8621CC013"). +func (pk *PublicKeyV3) KeyIdString() string { + return fmt.Sprintf("%X", pk.KeyId) +} + +// KeyIdShortString returns the short form of public key's fingerprint +// in capital hex, as shown by gpg --list-keys (e.g. "621CC013"). +func (pk *PublicKeyV3) KeyIdShortString() string { + return fmt.Sprintf("%X", pk.KeyId&0xFFFFFFFF) +} + +// BitLength returns the bit length for the given public key. +func (pk *PublicKeyV3) BitLength() (bitLength uint16, err error) { + switch pk.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly: + bitLength = pk.n.bitLength + default: + err = errors.InvalidArgumentError("bad public-key algorithm") + } + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/reader.go b/vendor/golang.org/x/crypto/openpgp/packet/reader.go new file mode 100644 index 0000000..34bc7c6 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/reader.go @@ -0,0 +1,76 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "golang.org/x/crypto/openpgp/errors" + "io" +) + +// Reader reads packets from an io.Reader and allows packets to be 'unread' so +// that they result from the next call to Next. +type Reader struct { + q []Packet + readers []io.Reader +} + +// New io.Readers are pushed when a compressed or encrypted packet is processed +// and recursively treated as a new source of packets. However, a carefully +// crafted packet can trigger an infinite recursive sequence of packets. See +// http://mumble.net/~campbell/misc/pgp-quine +// https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-4402 +// This constant limits the number of recursive packets that may be pushed. +const maxReaders = 32 + +// Next returns the most recently unread Packet, or reads another packet from +// the top-most io.Reader. Unknown packet types are skipped. +func (r *Reader) Next() (p Packet, err error) { + if len(r.q) > 0 { + p = r.q[len(r.q)-1] + r.q = r.q[:len(r.q)-1] + return + } + + for len(r.readers) > 0 { + p, err = Read(r.readers[len(r.readers)-1]) + if err == nil { + return + } + if err == io.EOF { + r.readers = r.readers[:len(r.readers)-1] + continue + } + if _, ok := err.(errors.UnknownPacketTypeError); !ok { + return nil, err + } + } + + return nil, io.EOF +} + +// Push causes the Reader to start reading from a new io.Reader. When an EOF +// error is seen from the new io.Reader, it is popped and the Reader continues +// to read from the next most recent io.Reader. Push returns a StructuralError +// if pushing the reader would exceed the maximum recursion level, otherwise it +// returns nil. +func (r *Reader) Push(reader io.Reader) (err error) { + if len(r.readers) >= maxReaders { + return errors.StructuralError("too many layers of packets") + } + r.readers = append(r.readers, reader) + return nil +} + +// Unread causes the given Packet to be returned from the next call to Next. +func (r *Reader) Unread(p Packet) { + r.q = append(r.q, p) +} + +func NewReader(r io.Reader) *Reader { + return &Reader{ + q: nil, + readers: []io.Reader{r}, + } +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/signature.go b/vendor/golang.org/x/crypto/openpgp/packet/signature.go new file mode 100644 index 0000000..6ce0cbe --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/signature.go @@ -0,0 +1,731 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "bytes" + "crypto" + "crypto/dsa" + "crypto/ecdsa" + "encoding/asn1" + "encoding/binary" + "hash" + "io" + "math/big" + "strconv" + "time" + + "golang.org/x/crypto/openpgp/errors" + "golang.org/x/crypto/openpgp/s2k" +) + +const ( + // See RFC 4880, section 5.2.3.21 for details. + KeyFlagCertify = 1 << iota + KeyFlagSign + KeyFlagEncryptCommunications + KeyFlagEncryptStorage +) + +// Signature represents a signature. See RFC 4880, section 5.2. +type Signature struct { + SigType SignatureType + PubKeyAlgo PublicKeyAlgorithm + Hash crypto.Hash + + // HashSuffix is extra data that is hashed in after the signed data. + HashSuffix []byte + // HashTag contains the first two bytes of the hash for fast rejection + // of bad signed data. + HashTag [2]byte + CreationTime time.Time + + RSASignature parsedMPI + DSASigR, DSASigS parsedMPI + ECDSASigR, ECDSASigS parsedMPI + + // rawSubpackets contains the unparsed subpackets, in order. + rawSubpackets []outputSubpacket + + // The following are optional so are nil when not included in the + // signature. + + SigLifetimeSecs, KeyLifetimeSecs *uint32 + PreferredSymmetric, PreferredHash, PreferredCompression []uint8 + IssuerKeyId *uint64 + IsPrimaryId *bool + + // FlagsValid is set if any flags were given. See RFC 4880, section + // 5.2.3.21 for details. + FlagsValid bool + FlagCertify, FlagSign, FlagEncryptCommunications, FlagEncryptStorage bool + + // RevocationReason is set if this signature has been revoked. + // See RFC 4880, section 5.2.3.23 for details. + RevocationReason *uint8 + RevocationReasonText string + + // MDC is set if this signature has a feature packet that indicates + // support for MDC subpackets. + MDC bool + + // EmbeddedSignature, if non-nil, is a signature of the parent key, by + // this key. This prevents an attacker from claiming another's signing + // subkey as their own. + EmbeddedSignature *Signature + + outSubpackets []outputSubpacket +} + +func (sig *Signature) parse(r io.Reader) (err error) { + // RFC 4880, section 5.2.3 + var buf [5]byte + _, err = readFull(r, buf[:1]) + if err != nil { + return + } + if buf[0] != 4 { + err = errors.UnsupportedError("signature packet version " + strconv.Itoa(int(buf[0]))) + return + } + + _, err = readFull(r, buf[:5]) + if err != nil { + return + } + sig.SigType = SignatureType(buf[0]) + sig.PubKeyAlgo = PublicKeyAlgorithm(buf[1]) + switch sig.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA: + default: + err = errors.UnsupportedError("public key algorithm " + strconv.Itoa(int(sig.PubKeyAlgo))) + return + } + + var ok bool + sig.Hash, ok = s2k.HashIdToHash(buf[2]) + if !ok { + return errors.UnsupportedError("hash function " + strconv.Itoa(int(buf[2]))) + } + + hashedSubpacketsLength := int(buf[3])<<8 | int(buf[4]) + l := 6 + hashedSubpacketsLength + sig.HashSuffix = make([]byte, l+6) + sig.HashSuffix[0] = 4 + copy(sig.HashSuffix[1:], buf[:5]) + hashedSubpackets := sig.HashSuffix[6:l] + _, err = readFull(r, hashedSubpackets) + if err != nil { + return + } + // See RFC 4880, section 5.2.4 + trailer := sig.HashSuffix[l:] + trailer[0] = 4 + trailer[1] = 0xff + trailer[2] = uint8(l >> 24) + trailer[3] = uint8(l >> 16) + trailer[4] = uint8(l >> 8) + trailer[5] = uint8(l) + + err = parseSignatureSubpackets(sig, hashedSubpackets, true) + if err != nil { + return + } + + _, err = readFull(r, buf[:2]) + if err != nil { + return + } + unhashedSubpacketsLength := int(buf[0])<<8 | int(buf[1]) + unhashedSubpackets := make([]byte, unhashedSubpacketsLength) + _, err = readFull(r, unhashedSubpackets) + if err != nil { + return + } + err = parseSignatureSubpackets(sig, unhashedSubpackets, false) + if err != nil { + return + } + + _, err = readFull(r, sig.HashTag[:2]) + if err != nil { + return + } + + switch sig.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + sig.RSASignature.bytes, sig.RSASignature.bitLength, err = readMPI(r) + case PubKeyAlgoDSA: + sig.DSASigR.bytes, sig.DSASigR.bitLength, err = readMPI(r) + if err == nil { + sig.DSASigS.bytes, sig.DSASigS.bitLength, err = readMPI(r) + } + case PubKeyAlgoECDSA: + sig.ECDSASigR.bytes, sig.ECDSASigR.bitLength, err = readMPI(r) + if err == nil { + sig.ECDSASigS.bytes, sig.ECDSASigS.bitLength, err = readMPI(r) + } + default: + panic("unreachable") + } + return +} + +// parseSignatureSubpackets parses subpackets of the main signature packet. See +// RFC 4880, section 5.2.3.1. +func parseSignatureSubpackets(sig *Signature, subpackets []byte, isHashed bool) (err error) { + for len(subpackets) > 0 { + subpackets, err = parseSignatureSubpacket(sig, subpackets, isHashed) + if err != nil { + return + } + } + + if sig.CreationTime.IsZero() { + err = errors.StructuralError("no creation time in signature") + } + + return +} + +type signatureSubpacketType uint8 + +const ( + creationTimeSubpacket signatureSubpacketType = 2 + signatureExpirationSubpacket signatureSubpacketType = 3 + keyExpirationSubpacket signatureSubpacketType = 9 + prefSymmetricAlgosSubpacket signatureSubpacketType = 11 + issuerSubpacket signatureSubpacketType = 16 + prefHashAlgosSubpacket signatureSubpacketType = 21 + prefCompressionSubpacket signatureSubpacketType = 22 + primaryUserIdSubpacket signatureSubpacketType = 25 + keyFlagsSubpacket signatureSubpacketType = 27 + reasonForRevocationSubpacket signatureSubpacketType = 29 + featuresSubpacket signatureSubpacketType = 30 + embeddedSignatureSubpacket signatureSubpacketType = 32 +) + +// parseSignatureSubpacket parses a single subpacket. len(subpacket) is >= 1. +func parseSignatureSubpacket(sig *Signature, subpacket []byte, isHashed bool) (rest []byte, err error) { + // RFC 4880, section 5.2.3.1 + var ( + length uint32 + packetType signatureSubpacketType + isCritical bool + ) + switch { + case subpacket[0] < 192: + length = uint32(subpacket[0]) + subpacket = subpacket[1:] + case subpacket[0] < 255: + if len(subpacket) < 2 { + goto Truncated + } + length = uint32(subpacket[0]-192)<<8 + uint32(subpacket[1]) + 192 + subpacket = subpacket[2:] + default: + if len(subpacket) < 5 { + goto Truncated + } + length = uint32(subpacket[1])<<24 | + uint32(subpacket[2])<<16 | + uint32(subpacket[3])<<8 | + uint32(subpacket[4]) + subpacket = subpacket[5:] + } + if length > uint32(len(subpacket)) { + goto Truncated + } + rest = subpacket[length:] + subpacket = subpacket[:length] + if len(subpacket) == 0 { + err = errors.StructuralError("zero length signature subpacket") + return + } + packetType = signatureSubpacketType(subpacket[0] & 0x7f) + isCritical = subpacket[0]&0x80 == 0x80 + subpacket = subpacket[1:] + sig.rawSubpackets = append(sig.rawSubpackets, outputSubpacket{isHashed, packetType, isCritical, subpacket}) + switch packetType { + case creationTimeSubpacket: + if !isHashed { + err = errors.StructuralError("signature creation time in non-hashed area") + return + } + if len(subpacket) != 4 { + err = errors.StructuralError("signature creation time not four bytes") + return + } + t := binary.BigEndian.Uint32(subpacket) + sig.CreationTime = time.Unix(int64(t), 0) + case signatureExpirationSubpacket: + // Signature expiration time, section 5.2.3.10 + if !isHashed { + return + } + if len(subpacket) != 4 { + err = errors.StructuralError("expiration subpacket with bad length") + return + } + sig.SigLifetimeSecs = new(uint32) + *sig.SigLifetimeSecs = binary.BigEndian.Uint32(subpacket) + case keyExpirationSubpacket: + // Key expiration time, section 5.2.3.6 + if !isHashed { + return + } + if len(subpacket) != 4 { + err = errors.StructuralError("key expiration subpacket with bad length") + return + } + sig.KeyLifetimeSecs = new(uint32) + *sig.KeyLifetimeSecs = binary.BigEndian.Uint32(subpacket) + case prefSymmetricAlgosSubpacket: + // Preferred symmetric algorithms, section 5.2.3.7 + if !isHashed { + return + } + sig.PreferredSymmetric = make([]byte, len(subpacket)) + copy(sig.PreferredSymmetric, subpacket) + case issuerSubpacket: + // Issuer, section 5.2.3.5 + if len(subpacket) != 8 { + err = errors.StructuralError("issuer subpacket with bad length") + return + } + sig.IssuerKeyId = new(uint64) + *sig.IssuerKeyId = binary.BigEndian.Uint64(subpacket) + case prefHashAlgosSubpacket: + // Preferred hash algorithms, section 5.2.3.8 + if !isHashed { + return + } + sig.PreferredHash = make([]byte, len(subpacket)) + copy(sig.PreferredHash, subpacket) + case prefCompressionSubpacket: + // Preferred compression algorithms, section 5.2.3.9 + if !isHashed { + return + } + sig.PreferredCompression = make([]byte, len(subpacket)) + copy(sig.PreferredCompression, subpacket) + case primaryUserIdSubpacket: + // Primary User ID, section 5.2.3.19 + if !isHashed { + return + } + if len(subpacket) != 1 { + err = errors.StructuralError("primary user id subpacket with bad length") + return + } + sig.IsPrimaryId = new(bool) + if subpacket[0] > 0 { + *sig.IsPrimaryId = true + } + case keyFlagsSubpacket: + // Key flags, section 5.2.3.21 + if !isHashed { + return + } + if len(subpacket) == 0 { + err = errors.StructuralError("empty key flags subpacket") + return + } + sig.FlagsValid = true + if subpacket[0]&KeyFlagCertify != 0 { + sig.FlagCertify = true + } + if subpacket[0]&KeyFlagSign != 0 { + sig.FlagSign = true + } + if subpacket[0]&KeyFlagEncryptCommunications != 0 { + sig.FlagEncryptCommunications = true + } + if subpacket[0]&KeyFlagEncryptStorage != 0 { + sig.FlagEncryptStorage = true + } + case reasonForRevocationSubpacket: + // Reason For Revocation, section 5.2.3.23 + if !isHashed { + return + } + if len(subpacket) == 0 { + err = errors.StructuralError("empty revocation reason subpacket") + return + } + sig.RevocationReason = new(uint8) + *sig.RevocationReason = subpacket[0] + sig.RevocationReasonText = string(subpacket[1:]) + case featuresSubpacket: + // Features subpacket, section 5.2.3.24 specifies a very general + // mechanism for OpenPGP implementations to signal support for new + // features. In practice, the subpacket is used exclusively to + // indicate support for MDC-protected encryption. + sig.MDC = len(subpacket) >= 1 && subpacket[0]&1 == 1 + case embeddedSignatureSubpacket: + // Only usage is in signatures that cross-certify + // signing subkeys. section 5.2.3.26 describes the + // format, with its usage described in section 11.1 + if sig.EmbeddedSignature != nil { + err = errors.StructuralError("Cannot have multiple embedded signatures") + return + } + sig.EmbeddedSignature = new(Signature) + // Embedded signatures are required to be v4 signatures see + // section 12.1. However, we only parse v4 signatures in this + // file anyway. + if err := sig.EmbeddedSignature.parse(bytes.NewBuffer(subpacket)); err != nil { + return nil, err + } + if sigType := sig.EmbeddedSignature.SigType; sigType != SigTypePrimaryKeyBinding { + return nil, errors.StructuralError("cross-signature has unexpected type " + strconv.Itoa(int(sigType))) + } + default: + if isCritical { + err = errors.UnsupportedError("unknown critical signature subpacket type " + strconv.Itoa(int(packetType))) + return + } + } + return + +Truncated: + err = errors.StructuralError("signature subpacket truncated") + return +} + +// subpacketLengthLength returns the length, in bytes, of an encoded length value. +func subpacketLengthLength(length int) int { + if length < 192 { + return 1 + } + if length < 16320 { + return 2 + } + return 5 +} + +// serializeSubpacketLength marshals the given length into to. +func serializeSubpacketLength(to []byte, length int) int { + // RFC 4880, Section 4.2.2. + if length < 192 { + to[0] = byte(length) + return 1 + } + if length < 16320 { + length -= 192 + to[0] = byte((length >> 8) + 192) + to[1] = byte(length) + return 2 + } + to[0] = 255 + to[1] = byte(length >> 24) + to[2] = byte(length >> 16) + to[3] = byte(length >> 8) + to[4] = byte(length) + return 5 +} + +// subpacketsLength returns the serialized length, in bytes, of the given +// subpackets. +func subpacketsLength(subpackets []outputSubpacket, hashed bool) (length int) { + for _, subpacket := range subpackets { + if subpacket.hashed == hashed { + length += subpacketLengthLength(len(subpacket.contents) + 1) + length += 1 // type byte + length += len(subpacket.contents) + } + } + return +} + +// serializeSubpackets marshals the given subpackets into to. +func serializeSubpackets(to []byte, subpackets []outputSubpacket, hashed bool) { + for _, subpacket := range subpackets { + if subpacket.hashed == hashed { + n := serializeSubpacketLength(to, len(subpacket.contents)+1) + to[n] = byte(subpacket.subpacketType) + to = to[1+n:] + n = copy(to, subpacket.contents) + to = to[n:] + } + } + return +} + +// KeyExpired returns whether sig is a self-signature of a key that has +// expired. +func (sig *Signature) KeyExpired(currentTime time.Time) bool { + if sig.KeyLifetimeSecs == nil { + return false + } + expiry := sig.CreationTime.Add(time.Duration(*sig.KeyLifetimeSecs) * time.Second) + return currentTime.After(expiry) +} + +// buildHashSuffix constructs the HashSuffix member of sig in preparation for signing. +func (sig *Signature) buildHashSuffix() (err error) { + hashedSubpacketsLen := subpacketsLength(sig.outSubpackets, true) + + var ok bool + l := 6 + hashedSubpacketsLen + sig.HashSuffix = make([]byte, l+6) + sig.HashSuffix[0] = 4 + sig.HashSuffix[1] = uint8(sig.SigType) + sig.HashSuffix[2] = uint8(sig.PubKeyAlgo) + sig.HashSuffix[3], ok = s2k.HashToHashId(sig.Hash) + if !ok { + sig.HashSuffix = nil + return errors.InvalidArgumentError("hash cannot be represented in OpenPGP: " + strconv.Itoa(int(sig.Hash))) + } + sig.HashSuffix[4] = byte(hashedSubpacketsLen >> 8) + sig.HashSuffix[5] = byte(hashedSubpacketsLen) + serializeSubpackets(sig.HashSuffix[6:l], sig.outSubpackets, true) + trailer := sig.HashSuffix[l:] + trailer[0] = 4 + trailer[1] = 0xff + trailer[2] = byte(l >> 24) + trailer[3] = byte(l >> 16) + trailer[4] = byte(l >> 8) + trailer[5] = byte(l) + return +} + +func (sig *Signature) signPrepareHash(h hash.Hash) (digest []byte, err error) { + err = sig.buildHashSuffix() + if err != nil { + return + } + + h.Write(sig.HashSuffix) + digest = h.Sum(nil) + copy(sig.HashTag[:], digest) + return +} + +// Sign signs a message with a private key. The hash, h, must contain +// the hash of the message to be signed and will be mutated by this function. +// On success, the signature is stored in sig. Call Serialize to write it out. +// If config is nil, sensible defaults will be used. +func (sig *Signature) Sign(h hash.Hash, priv *PrivateKey, config *Config) (err error) { + sig.outSubpackets = sig.buildSubpackets() + digest, err := sig.signPrepareHash(h) + if err != nil { + return + } + + switch priv.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + // supports both *rsa.PrivateKey and crypto.Signer + sig.RSASignature.bytes, err = priv.PrivateKey.(crypto.Signer).Sign(config.Random(), digest, sig.Hash) + sig.RSASignature.bitLength = uint16(8 * len(sig.RSASignature.bytes)) + case PubKeyAlgoDSA: + dsaPriv := priv.PrivateKey.(*dsa.PrivateKey) + + // Need to truncate hashBytes to match FIPS 186-3 section 4.6. + subgroupSize := (dsaPriv.Q.BitLen() + 7) / 8 + if len(digest) > subgroupSize { + digest = digest[:subgroupSize] + } + r, s, err := dsa.Sign(config.Random(), dsaPriv, digest) + if err == nil { + sig.DSASigR.bytes = r.Bytes() + sig.DSASigR.bitLength = uint16(8 * len(sig.DSASigR.bytes)) + sig.DSASigS.bytes = s.Bytes() + sig.DSASigS.bitLength = uint16(8 * len(sig.DSASigS.bytes)) + } + case PubKeyAlgoECDSA: + var r, s *big.Int + if pk, ok := priv.PrivateKey.(*ecdsa.PrivateKey); ok { + // direct support, avoid asn1 wrapping/unwrapping + r, s, err = ecdsa.Sign(config.Random(), pk, digest) + } else { + var b []byte + b, err = priv.PrivateKey.(crypto.Signer).Sign(config.Random(), digest, nil) + if err == nil { + r, s, err = unwrapECDSASig(b) + } + } + if err == nil { + sig.ECDSASigR = fromBig(r) + sig.ECDSASigS = fromBig(s) + } + default: + err = errors.UnsupportedError("public key algorithm: " + strconv.Itoa(int(sig.PubKeyAlgo))) + } + + return +} + +// unwrapECDSASig parses the two integer components of an ASN.1-encoded ECDSA +// signature. +func unwrapECDSASig(b []byte) (r, s *big.Int, err error) { + var ecsdaSig struct { + R, S *big.Int + } + _, err = asn1.Unmarshal(b, &ecsdaSig) + if err != nil { + return + } + return ecsdaSig.R, ecsdaSig.S, nil +} + +// SignUserId computes a signature from priv, asserting that pub is a valid +// key for the identity id. On success, the signature is stored in sig. Call +// Serialize to write it out. +// If config is nil, sensible defaults will be used. +func (sig *Signature) SignUserId(id string, pub *PublicKey, priv *PrivateKey, config *Config) error { + h, err := userIdSignatureHash(id, pub, sig.Hash) + if err != nil { + return err + } + return sig.Sign(h, priv, config) +} + +// SignKey computes a signature from priv, asserting that pub is a subkey. On +// success, the signature is stored in sig. Call Serialize to write it out. +// If config is nil, sensible defaults will be used. +func (sig *Signature) SignKey(pub *PublicKey, priv *PrivateKey, config *Config) error { + h, err := keySignatureHash(&priv.PublicKey, pub, sig.Hash) + if err != nil { + return err + } + return sig.Sign(h, priv, config) +} + +// Serialize marshals sig to w. Sign, SignUserId or SignKey must have been +// called first. +func (sig *Signature) Serialize(w io.Writer) (err error) { + if len(sig.outSubpackets) == 0 { + sig.outSubpackets = sig.rawSubpackets + } + if sig.RSASignature.bytes == nil && sig.DSASigR.bytes == nil && sig.ECDSASigR.bytes == nil { + return errors.InvalidArgumentError("Signature: need to call Sign, SignUserId or SignKey before Serialize") + } + + sigLength := 0 + switch sig.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + sigLength = 2 + len(sig.RSASignature.bytes) + case PubKeyAlgoDSA: + sigLength = 2 + len(sig.DSASigR.bytes) + sigLength += 2 + len(sig.DSASigS.bytes) + case PubKeyAlgoECDSA: + sigLength = 2 + len(sig.ECDSASigR.bytes) + sigLength += 2 + len(sig.ECDSASigS.bytes) + default: + panic("impossible") + } + + unhashedSubpacketsLen := subpacketsLength(sig.outSubpackets, false) + length := len(sig.HashSuffix) - 6 /* trailer not included */ + + 2 /* length of unhashed subpackets */ + unhashedSubpacketsLen + + 2 /* hash tag */ + sigLength + err = serializeHeader(w, packetTypeSignature, length) + if err != nil { + return + } + + _, err = w.Write(sig.HashSuffix[:len(sig.HashSuffix)-6]) + if err != nil { + return + } + + unhashedSubpackets := make([]byte, 2+unhashedSubpacketsLen) + unhashedSubpackets[0] = byte(unhashedSubpacketsLen >> 8) + unhashedSubpackets[1] = byte(unhashedSubpacketsLen) + serializeSubpackets(unhashedSubpackets[2:], sig.outSubpackets, false) + + _, err = w.Write(unhashedSubpackets) + if err != nil { + return + } + _, err = w.Write(sig.HashTag[:]) + if err != nil { + return + } + + switch sig.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + err = writeMPIs(w, sig.RSASignature) + case PubKeyAlgoDSA: + err = writeMPIs(w, sig.DSASigR, sig.DSASigS) + case PubKeyAlgoECDSA: + err = writeMPIs(w, sig.ECDSASigR, sig.ECDSASigS) + default: + panic("impossible") + } + return +} + +// outputSubpacket represents a subpacket to be marshaled. +type outputSubpacket struct { + hashed bool // true if this subpacket is in the hashed area. + subpacketType signatureSubpacketType + isCritical bool + contents []byte +} + +func (sig *Signature) buildSubpackets() (subpackets []outputSubpacket) { + creationTime := make([]byte, 4) + binary.BigEndian.PutUint32(creationTime, uint32(sig.CreationTime.Unix())) + subpackets = append(subpackets, outputSubpacket{true, creationTimeSubpacket, false, creationTime}) + + if sig.IssuerKeyId != nil { + keyId := make([]byte, 8) + binary.BigEndian.PutUint64(keyId, *sig.IssuerKeyId) + subpackets = append(subpackets, outputSubpacket{true, issuerSubpacket, false, keyId}) + } + + if sig.SigLifetimeSecs != nil && *sig.SigLifetimeSecs != 0 { + sigLifetime := make([]byte, 4) + binary.BigEndian.PutUint32(sigLifetime, *sig.SigLifetimeSecs) + subpackets = append(subpackets, outputSubpacket{true, signatureExpirationSubpacket, true, sigLifetime}) + } + + // Key flags may only appear in self-signatures or certification signatures. + + if sig.FlagsValid { + var flags byte + if sig.FlagCertify { + flags |= KeyFlagCertify + } + if sig.FlagSign { + flags |= KeyFlagSign + } + if sig.FlagEncryptCommunications { + flags |= KeyFlagEncryptCommunications + } + if sig.FlagEncryptStorage { + flags |= KeyFlagEncryptStorage + } + subpackets = append(subpackets, outputSubpacket{true, keyFlagsSubpacket, false, []byte{flags}}) + } + + // The following subpackets may only appear in self-signatures + + if sig.KeyLifetimeSecs != nil && *sig.KeyLifetimeSecs != 0 { + keyLifetime := make([]byte, 4) + binary.BigEndian.PutUint32(keyLifetime, *sig.KeyLifetimeSecs) + subpackets = append(subpackets, outputSubpacket{true, keyExpirationSubpacket, true, keyLifetime}) + } + + if sig.IsPrimaryId != nil && *sig.IsPrimaryId { + subpackets = append(subpackets, outputSubpacket{true, primaryUserIdSubpacket, false, []byte{1}}) + } + + if len(sig.PreferredSymmetric) > 0 { + subpackets = append(subpackets, outputSubpacket{true, prefSymmetricAlgosSubpacket, false, sig.PreferredSymmetric}) + } + + if len(sig.PreferredHash) > 0 { + subpackets = append(subpackets, outputSubpacket{true, prefHashAlgosSubpacket, false, sig.PreferredHash}) + } + + if len(sig.PreferredCompression) > 0 { + subpackets = append(subpackets, outputSubpacket{true, prefCompressionSubpacket, false, sig.PreferredCompression}) + } + + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go b/vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go new file mode 100644 index 0000000..6edff88 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go @@ -0,0 +1,146 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "crypto" + "encoding/binary" + "fmt" + "io" + "strconv" + "time" + + "golang.org/x/crypto/openpgp/errors" + "golang.org/x/crypto/openpgp/s2k" +) + +// SignatureV3 represents older version 3 signatures. These signatures are less secure +// than version 4 and should not be used to create new signatures. They are included +// here for backwards compatibility to read and validate with older key material. +// See RFC 4880, section 5.2.2. +type SignatureV3 struct { + SigType SignatureType + CreationTime time.Time + IssuerKeyId uint64 + PubKeyAlgo PublicKeyAlgorithm + Hash crypto.Hash + HashTag [2]byte + + RSASignature parsedMPI + DSASigR, DSASigS parsedMPI +} + +func (sig *SignatureV3) parse(r io.Reader) (err error) { + // RFC 4880, section 5.2.2 + var buf [8]byte + if _, err = readFull(r, buf[:1]); err != nil { + return + } + if buf[0] < 2 || buf[0] > 3 { + err = errors.UnsupportedError("signature packet version " + strconv.Itoa(int(buf[0]))) + return + } + if _, err = readFull(r, buf[:1]); err != nil { + return + } + if buf[0] != 5 { + err = errors.UnsupportedError( + "invalid hashed material length " + strconv.Itoa(int(buf[0]))) + return + } + + // Read hashed material: signature type + creation time + if _, err = readFull(r, buf[:5]); err != nil { + return + } + sig.SigType = SignatureType(buf[0]) + t := binary.BigEndian.Uint32(buf[1:5]) + sig.CreationTime = time.Unix(int64(t), 0) + + // Eight-octet Key ID of signer. + if _, err = readFull(r, buf[:8]); err != nil { + return + } + sig.IssuerKeyId = binary.BigEndian.Uint64(buf[:]) + + // Public-key and hash algorithm + if _, err = readFull(r, buf[:2]); err != nil { + return + } + sig.PubKeyAlgo = PublicKeyAlgorithm(buf[0]) + switch sig.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA: + default: + err = errors.UnsupportedError("public key algorithm " + strconv.Itoa(int(sig.PubKeyAlgo))) + return + } + var ok bool + if sig.Hash, ok = s2k.HashIdToHash(buf[1]); !ok { + return errors.UnsupportedError("hash function " + strconv.Itoa(int(buf[2]))) + } + + // Two-octet field holding left 16 bits of signed hash value. + if _, err = readFull(r, sig.HashTag[:2]); err != nil { + return + } + + switch sig.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + sig.RSASignature.bytes, sig.RSASignature.bitLength, err = readMPI(r) + case PubKeyAlgoDSA: + if sig.DSASigR.bytes, sig.DSASigR.bitLength, err = readMPI(r); err != nil { + return + } + sig.DSASigS.bytes, sig.DSASigS.bitLength, err = readMPI(r) + default: + panic("unreachable") + } + return +} + +// Serialize marshals sig to w. Sign, SignUserId or SignKey must have been +// called first. +func (sig *SignatureV3) Serialize(w io.Writer) (err error) { + buf := make([]byte, 8) + + // Write the sig type and creation time + buf[0] = byte(sig.SigType) + binary.BigEndian.PutUint32(buf[1:5], uint32(sig.CreationTime.Unix())) + if _, err = w.Write(buf[:5]); err != nil { + return + } + + // Write the issuer long key ID + binary.BigEndian.PutUint64(buf[:8], sig.IssuerKeyId) + if _, err = w.Write(buf[:8]); err != nil { + return + } + + // Write public key algorithm, hash ID, and hash value + buf[0] = byte(sig.PubKeyAlgo) + hashId, ok := s2k.HashToHashId(sig.Hash) + if !ok { + return errors.UnsupportedError(fmt.Sprintf("hash function %v", sig.Hash)) + } + buf[1] = hashId + copy(buf[2:4], sig.HashTag[:]) + if _, err = w.Write(buf[:4]); err != nil { + return + } + + if sig.RSASignature.bytes == nil && sig.DSASigR.bytes == nil { + return errors.InvalidArgumentError("Signature: need to call Sign, SignUserId or SignKey before Serialize") + } + + switch sig.PubKeyAlgo { + case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly: + err = writeMPIs(w, sig.RSASignature) + case PubKeyAlgoDSA: + err = writeMPIs(w, sig.DSASigR, sig.DSASigS) + default: + panic("impossible") + } + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go b/vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go new file mode 100644 index 0000000..744c2d2 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go @@ -0,0 +1,155 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "bytes" + "crypto/cipher" + "io" + "strconv" + + "golang.org/x/crypto/openpgp/errors" + "golang.org/x/crypto/openpgp/s2k" +) + +// This is the largest session key that we'll support. Since no 512-bit cipher +// has even been seriously used, this is comfortably large. +const maxSessionKeySizeInBytes = 64 + +// SymmetricKeyEncrypted represents a passphrase protected session key. See RFC +// 4880, section 5.3. +type SymmetricKeyEncrypted struct { + CipherFunc CipherFunction + s2k func(out, in []byte) + encryptedKey []byte +} + +const symmetricKeyEncryptedVersion = 4 + +func (ske *SymmetricKeyEncrypted) parse(r io.Reader) error { + // RFC 4880, section 5.3. + var buf [2]byte + if _, err := readFull(r, buf[:]); err != nil { + return err + } + if buf[0] != symmetricKeyEncryptedVersion { + return errors.UnsupportedError("SymmetricKeyEncrypted version") + } + ske.CipherFunc = CipherFunction(buf[1]) + + if ske.CipherFunc.KeySize() == 0 { + return errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(buf[1]))) + } + + var err error + ske.s2k, err = s2k.Parse(r) + if err != nil { + return err + } + + encryptedKey := make([]byte, maxSessionKeySizeInBytes) + // The session key may follow. We just have to try and read to find + // out. If it exists then we limit it to maxSessionKeySizeInBytes. + n, err := readFull(r, encryptedKey) + if err != nil && err != io.ErrUnexpectedEOF { + return err + } + + if n != 0 { + if n == maxSessionKeySizeInBytes { + return errors.UnsupportedError("oversized encrypted session key") + } + ske.encryptedKey = encryptedKey[:n] + } + + return nil +} + +// Decrypt attempts to decrypt an encrypted session key and returns the key and +// the cipher to use when decrypting a subsequent Symmetrically Encrypted Data +// packet. +func (ske *SymmetricKeyEncrypted) Decrypt(passphrase []byte) ([]byte, CipherFunction, error) { + key := make([]byte, ske.CipherFunc.KeySize()) + ske.s2k(key, passphrase) + + if len(ske.encryptedKey) == 0 { + return key, ske.CipherFunc, nil + } + + // the IV is all zeros + iv := make([]byte, ske.CipherFunc.blockSize()) + c := cipher.NewCFBDecrypter(ske.CipherFunc.new(key), iv) + plaintextKey := make([]byte, len(ske.encryptedKey)) + c.XORKeyStream(plaintextKey, ske.encryptedKey) + cipherFunc := CipherFunction(plaintextKey[0]) + if cipherFunc.blockSize() == 0 { + return nil, ske.CipherFunc, errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(cipherFunc))) + } + plaintextKey = plaintextKey[1:] + if l, cipherKeySize := len(plaintextKey), cipherFunc.KeySize(); l != cipherFunc.KeySize() { + return nil, cipherFunc, errors.StructuralError("length of decrypted key (" + strconv.Itoa(l) + ") " + + "not equal to cipher keysize (" + strconv.Itoa(cipherKeySize) + ")") + } + return plaintextKey, cipherFunc, nil +} + +// SerializeSymmetricKeyEncrypted serializes a symmetric key packet to w. The +// packet contains a random session key, encrypted by a key derived from the +// given passphrase. The session key is returned and must be passed to +// SerializeSymmetricallyEncrypted. +// If config is nil, sensible defaults will be used. +func SerializeSymmetricKeyEncrypted(w io.Writer, passphrase []byte, config *Config) (key []byte, err error) { + cipherFunc := config.Cipher() + keySize := cipherFunc.KeySize() + if keySize == 0 { + return nil, errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(cipherFunc))) + } + + s2kBuf := new(bytes.Buffer) + keyEncryptingKey := make([]byte, keySize) + // s2k.Serialize salts and stretches the passphrase, and writes the + // resulting key to keyEncryptingKey and the s2k descriptor to s2kBuf. + err = s2k.Serialize(s2kBuf, keyEncryptingKey, config.Random(), passphrase, &s2k.Config{Hash: config.Hash(), S2KCount: config.PasswordHashIterations()}) + if err != nil { + return + } + s2kBytes := s2kBuf.Bytes() + + packetLength := 2 /* header */ + len(s2kBytes) + 1 /* cipher type */ + keySize + err = serializeHeader(w, packetTypeSymmetricKeyEncrypted, packetLength) + if err != nil { + return + } + + var buf [2]byte + buf[0] = symmetricKeyEncryptedVersion + buf[1] = byte(cipherFunc) + _, err = w.Write(buf[:]) + if err != nil { + return + } + _, err = w.Write(s2kBytes) + if err != nil { + return + } + + sessionKey := make([]byte, keySize) + _, err = io.ReadFull(config.Random(), sessionKey) + if err != nil { + return + } + iv := make([]byte, cipherFunc.blockSize()) + c := cipher.NewCFBEncrypter(cipherFunc.new(keyEncryptingKey), iv) + encryptedCipherAndKey := make([]byte, keySize+1) + c.XORKeyStream(encryptedCipherAndKey, buf[1:]) + c.XORKeyStream(encryptedCipherAndKey[1:], sessionKey) + _, err = w.Write(encryptedCipherAndKey) + if err != nil { + return + } + + key = sessionKey + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go b/vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go new file mode 100644 index 0000000..6126030 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go @@ -0,0 +1,290 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "crypto/cipher" + "crypto/sha1" + "crypto/subtle" + "golang.org/x/crypto/openpgp/errors" + "hash" + "io" + "strconv" +) + +// SymmetricallyEncrypted represents a symmetrically encrypted byte string. The +// encrypted contents will consist of more OpenPGP packets. See RFC 4880, +// sections 5.7 and 5.13. +type SymmetricallyEncrypted struct { + MDC bool // true iff this is a type 18 packet and thus has an embedded MAC. + contents io.Reader + prefix []byte +} + +const symmetricallyEncryptedVersion = 1 + +func (se *SymmetricallyEncrypted) parse(r io.Reader) error { + if se.MDC { + // See RFC 4880, section 5.13. + var buf [1]byte + _, err := readFull(r, buf[:]) + if err != nil { + return err + } + if buf[0] != symmetricallyEncryptedVersion { + return errors.UnsupportedError("unknown SymmetricallyEncrypted version") + } + } + se.contents = r + return nil +} + +// Decrypt returns a ReadCloser, from which the decrypted contents of the +// packet can be read. An incorrect key can, with high probability, be detected +// immediately and this will result in a KeyIncorrect error being returned. +func (se *SymmetricallyEncrypted) Decrypt(c CipherFunction, key []byte) (io.ReadCloser, error) { + keySize := c.KeySize() + if keySize == 0 { + return nil, errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(c))) + } + if len(key) != keySize { + return nil, errors.InvalidArgumentError("SymmetricallyEncrypted: incorrect key length") + } + + if se.prefix == nil { + se.prefix = make([]byte, c.blockSize()+2) + _, err := readFull(se.contents, se.prefix) + if err != nil { + return nil, err + } + } else if len(se.prefix) != c.blockSize()+2 { + return nil, errors.InvalidArgumentError("can't try ciphers with different block lengths") + } + + ocfbResync := OCFBResync + if se.MDC { + // MDC packets use a different form of OCFB mode. + ocfbResync = OCFBNoResync + } + + s := NewOCFBDecrypter(c.new(key), se.prefix, ocfbResync) + if s == nil { + return nil, errors.ErrKeyIncorrect + } + + plaintext := cipher.StreamReader{S: s, R: se.contents} + + if se.MDC { + // MDC packets have an embedded hash that we need to check. + h := sha1.New() + h.Write(se.prefix) + return &seMDCReader{in: plaintext, h: h}, nil + } + + // Otherwise, we just need to wrap plaintext so that it's a valid ReadCloser. + return seReader{plaintext}, nil +} + +// seReader wraps an io.Reader with a no-op Close method. +type seReader struct { + in io.Reader +} + +func (ser seReader) Read(buf []byte) (int, error) { + return ser.in.Read(buf) +} + +func (ser seReader) Close() error { + return nil +} + +const mdcTrailerSize = 1 /* tag byte */ + 1 /* length byte */ + sha1.Size + +// An seMDCReader wraps an io.Reader, maintains a running hash and keeps hold +// of the most recent 22 bytes (mdcTrailerSize). Upon EOF, those bytes form an +// MDC packet containing a hash of the previous contents which is checked +// against the running hash. See RFC 4880, section 5.13. +type seMDCReader struct { + in io.Reader + h hash.Hash + trailer [mdcTrailerSize]byte + scratch [mdcTrailerSize]byte + trailerUsed int + error bool + eof bool +} + +func (ser *seMDCReader) Read(buf []byte) (n int, err error) { + if ser.error { + err = io.ErrUnexpectedEOF + return + } + if ser.eof { + err = io.EOF + return + } + + // If we haven't yet filled the trailer buffer then we must do that + // first. + for ser.trailerUsed < mdcTrailerSize { + n, err = ser.in.Read(ser.trailer[ser.trailerUsed:]) + ser.trailerUsed += n + if err == io.EOF { + if ser.trailerUsed != mdcTrailerSize { + n = 0 + err = io.ErrUnexpectedEOF + ser.error = true + return + } + ser.eof = true + n = 0 + return + } + + if err != nil { + n = 0 + return + } + } + + // If it's a short read then we read into a temporary buffer and shift + // the data into the caller's buffer. + if len(buf) <= mdcTrailerSize { + n, err = readFull(ser.in, ser.scratch[:len(buf)]) + copy(buf, ser.trailer[:n]) + ser.h.Write(buf[:n]) + copy(ser.trailer[:], ser.trailer[n:]) + copy(ser.trailer[mdcTrailerSize-n:], ser.scratch[:]) + if n < len(buf) { + ser.eof = true + err = io.EOF + } + return + } + + n, err = ser.in.Read(buf[mdcTrailerSize:]) + copy(buf, ser.trailer[:]) + ser.h.Write(buf[:n]) + copy(ser.trailer[:], buf[n:]) + + if err == io.EOF { + ser.eof = true + } + return +} + +// This is a new-format packet tag byte for a type 19 (MDC) packet. +const mdcPacketTagByte = byte(0x80) | 0x40 | 19 + +func (ser *seMDCReader) Close() error { + if ser.error { + return errors.SignatureError("error during reading") + } + + for !ser.eof { + // We haven't seen EOF so we need to read to the end + var buf [1024]byte + _, err := ser.Read(buf[:]) + if err == io.EOF { + break + } + if err != nil { + return errors.SignatureError("error during reading") + } + } + + if ser.trailer[0] != mdcPacketTagByte || ser.trailer[1] != sha1.Size { + return errors.SignatureError("MDC packet not found") + } + ser.h.Write(ser.trailer[:2]) + + final := ser.h.Sum(nil) + if subtle.ConstantTimeCompare(final, ser.trailer[2:]) != 1 { + return errors.SignatureError("hash mismatch") + } + return nil +} + +// An seMDCWriter writes through to an io.WriteCloser while maintains a running +// hash of the data written. On close, it emits an MDC packet containing the +// running hash. +type seMDCWriter struct { + w io.WriteCloser + h hash.Hash +} + +func (w *seMDCWriter) Write(buf []byte) (n int, err error) { + w.h.Write(buf) + return w.w.Write(buf) +} + +func (w *seMDCWriter) Close() (err error) { + var buf [mdcTrailerSize]byte + + buf[0] = mdcPacketTagByte + buf[1] = sha1.Size + w.h.Write(buf[:2]) + digest := w.h.Sum(nil) + copy(buf[2:], digest) + + _, err = w.w.Write(buf[:]) + if err != nil { + return + } + return w.w.Close() +} + +// noOpCloser is like an ioutil.NopCloser, but for an io.Writer. +type noOpCloser struct { + w io.Writer +} + +func (c noOpCloser) Write(data []byte) (n int, err error) { + return c.w.Write(data) +} + +func (c noOpCloser) Close() error { + return nil +} + +// SerializeSymmetricallyEncrypted serializes a symmetrically encrypted packet +// to w and returns a WriteCloser to which the to-be-encrypted packets can be +// written. +// If config is nil, sensible defaults will be used. +func SerializeSymmetricallyEncrypted(w io.Writer, c CipherFunction, key []byte, config *Config) (contents io.WriteCloser, err error) { + if c.KeySize() != len(key) { + return nil, errors.InvalidArgumentError("SymmetricallyEncrypted.Serialize: bad key length") + } + writeCloser := noOpCloser{w} + ciphertext, err := serializeStreamHeader(writeCloser, packetTypeSymmetricallyEncryptedMDC) + if err != nil { + return + } + + _, err = ciphertext.Write([]byte{symmetricallyEncryptedVersion}) + if err != nil { + return + } + + block := c.new(key) + blockSize := block.BlockSize() + iv := make([]byte, blockSize) + _, err = config.Random().Read(iv) + if err != nil { + return + } + s, prefix := NewOCFBEncrypter(block, iv, OCFBNoResync) + _, err = ciphertext.Write(prefix) + if err != nil { + return + } + plaintext := cipher.StreamWriter{S: s, W: ciphertext} + + h := sha1.New() + h.Write(iv) + h.Write(iv[blockSize-2:]) + contents = &seMDCWriter{w: plaintext, h: h} + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go b/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go new file mode 100644 index 0000000..96a2b38 --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go @@ -0,0 +1,91 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "bytes" + "image" + "image/jpeg" + "io" + "io/ioutil" +) + +const UserAttrImageSubpacket = 1 + +// UserAttribute is capable of storing other types of data about a user +// beyond name, email and a text comment. In practice, user attributes are typically used +// to store a signed thumbnail photo JPEG image of the user. +// See RFC 4880, section 5.12. +type UserAttribute struct { + Contents []*OpaqueSubpacket +} + +// NewUserAttributePhoto creates a user attribute packet +// containing the given images. +func NewUserAttributePhoto(photos ...image.Image) (uat *UserAttribute, err error) { + uat = new(UserAttribute) + for _, photo := range photos { + var buf bytes.Buffer + // RFC 4880, Section 5.12.1. + data := []byte{ + 0x10, 0x00, // Little-endian image header length (16 bytes) + 0x01, // Image header version 1 + 0x01, // JPEG + 0, 0, 0, 0, // 12 reserved octets, must be all zero. + 0, 0, 0, 0, + 0, 0, 0, 0} + if _, err = buf.Write(data); err != nil { + return + } + if err = jpeg.Encode(&buf, photo, nil); err != nil { + return + } + uat.Contents = append(uat.Contents, &OpaqueSubpacket{ + SubType: UserAttrImageSubpacket, + Contents: buf.Bytes()}) + } + return +} + +// NewUserAttribute creates a new user attribute packet containing the given subpackets. +func NewUserAttribute(contents ...*OpaqueSubpacket) *UserAttribute { + return &UserAttribute{Contents: contents} +} + +func (uat *UserAttribute) parse(r io.Reader) (err error) { + // RFC 4880, section 5.13 + b, err := ioutil.ReadAll(r) + if err != nil { + return + } + uat.Contents, err = OpaqueSubpackets(b) + return +} + +// Serialize marshals the user attribute to w in the form of an OpenPGP packet, including +// header. +func (uat *UserAttribute) Serialize(w io.Writer) (err error) { + var buf bytes.Buffer + for _, sp := range uat.Contents { + sp.Serialize(&buf) + } + if err = serializeHeader(w, packetTypeUserAttribute, buf.Len()); err != nil { + return err + } + _, err = w.Write(buf.Bytes()) + return +} + +// ImageData returns zero or more byte slices, each containing +// JPEG File Interchange Format (JFIF), for each photo in the +// the user attribute packet. +func (uat *UserAttribute) ImageData() (imageData [][]byte) { + for _, sp := range uat.Contents { + if sp.SubType == UserAttrImageSubpacket && len(sp.Contents) > 16 { + imageData = append(imageData, sp.Contents[16:]) + } + } + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/packet/userid.go b/vendor/golang.org/x/crypto/openpgp/packet/userid.go new file mode 100644 index 0000000..d6bea7d --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/packet/userid.go @@ -0,0 +1,160 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package packet + +import ( + "io" + "io/ioutil" + "strings" +) + +// UserId contains text that is intended to represent the name and email +// address of the key holder. See RFC 4880, section 5.11. By convention, this +// takes the form "Full Name (Comment) " +type UserId struct { + Id string // By convention, this takes the form "Full Name (Comment) " which is split out in the fields below. + + Name, Comment, Email string +} + +func hasInvalidCharacters(s string) bool { + for _, c := range s { + switch c { + case '(', ')', '<', '>', 0: + return true + } + } + return false +} + +// NewUserId returns a UserId or nil if any of the arguments contain invalid +// characters. The invalid characters are '\x00', '(', ')', '<' and '>' +func NewUserId(name, comment, email string) *UserId { + // RFC 4880 doesn't deal with the structure of userid strings; the + // name, comment and email form is just a convention. However, there's + // no convention about escaping the metacharacters and GPG just refuses + // to create user ids where, say, the name contains a '('. We mirror + // this behaviour. + + if hasInvalidCharacters(name) || hasInvalidCharacters(comment) || hasInvalidCharacters(email) { + return nil + } + + uid := new(UserId) + uid.Name, uid.Comment, uid.Email = name, comment, email + uid.Id = name + if len(comment) > 0 { + if len(uid.Id) > 0 { + uid.Id += " " + } + uid.Id += "(" + uid.Id += comment + uid.Id += ")" + } + if len(email) > 0 { + if len(uid.Id) > 0 { + uid.Id += " " + } + uid.Id += "<" + uid.Id += email + uid.Id += ">" + } + return uid +} + +func (uid *UserId) parse(r io.Reader) (err error) { + // RFC 4880, section 5.11 + b, err := ioutil.ReadAll(r) + if err != nil { + return + } + uid.Id = string(b) + uid.Name, uid.Comment, uid.Email = parseUserId(uid.Id) + return +} + +// Serialize marshals uid to w in the form of an OpenPGP packet, including +// header. +func (uid *UserId) Serialize(w io.Writer) error { + err := serializeHeader(w, packetTypeUserId, len(uid.Id)) + if err != nil { + return err + } + _, err = w.Write([]byte(uid.Id)) + return err +} + +// parseUserId extracts the name, comment and email from a user id string that +// is formatted as "Full Name (Comment) ". +func parseUserId(id string) (name, comment, email string) { + var n, c, e struct { + start, end int + } + var state int + + for offset, rune := range id { + switch state { + case 0: + // Entering name + n.start = offset + state = 1 + fallthrough + case 1: + // In name + if rune == '(' { + state = 2 + n.end = offset + } else if rune == '<' { + state = 5 + n.end = offset + } + case 2: + // Entering comment + c.start = offset + state = 3 + fallthrough + case 3: + // In comment + if rune == ')' { + state = 4 + c.end = offset + } + case 4: + // Between comment and email + if rune == '<' { + state = 5 + } + case 5: + // Entering email + e.start = offset + state = 6 + fallthrough + case 6: + // In email + if rune == '>' { + state = 7 + e.end = offset + } + default: + // After email + } + } + switch state { + case 1: + // ended in the name + n.end = len(id) + case 3: + // ended in comment + c.end = len(id) + case 6: + // ended in email + e.end = len(id) + } + + name = strings.TrimSpace(id[n.start:n.end]) + comment = strings.TrimSpace(id[c.start:c.end]) + email = strings.TrimSpace(id[e.start:e.end]) + return +} diff --git a/vendor/golang.org/x/crypto/openpgp/read.go b/vendor/golang.org/x/crypto/openpgp/read.go new file mode 100644 index 0000000..6ec664f --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/read.go @@ -0,0 +1,442 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package openpgp implements high level operations on OpenPGP messages. +package openpgp // import "golang.org/x/crypto/openpgp" + +import ( + "crypto" + _ "crypto/sha256" + "hash" + "io" + "strconv" + + "golang.org/x/crypto/openpgp/armor" + "golang.org/x/crypto/openpgp/errors" + "golang.org/x/crypto/openpgp/packet" +) + +// SignatureType is the armor type for a PGP signature. +var SignatureType = "PGP SIGNATURE" + +// readArmored reads an armored block with the given type. +func readArmored(r io.Reader, expectedType string) (body io.Reader, err error) { + block, err := armor.Decode(r) + if err != nil { + return + } + + if block.Type != expectedType { + return nil, errors.InvalidArgumentError("expected '" + expectedType + "', got: " + block.Type) + } + + return block.Body, nil +} + +// MessageDetails contains the result of parsing an OpenPGP encrypted and/or +// signed message. +type MessageDetails struct { + IsEncrypted bool // true if the message was encrypted. + EncryptedToKeyIds []uint64 // the list of recipient key ids. + IsSymmetricallyEncrypted bool // true if a passphrase could have decrypted the message. + DecryptedWith Key // the private key used to decrypt the message, if any. + IsSigned bool // true if the message is signed. + SignedByKeyId uint64 // the key id of the signer, if any. + SignedBy *Key // the key of the signer, if available. + LiteralData *packet.LiteralData // the metadata of the contents + UnverifiedBody io.Reader // the contents of the message. + + // If IsSigned is true and SignedBy is non-zero then the signature will + // be verified as UnverifiedBody is read. The signature cannot be + // checked until the whole of UnverifiedBody is read so UnverifiedBody + // must be consumed until EOF before the data can be trusted. Even if a + // message isn't signed (or the signer is unknown) the data may contain + // an authentication code that is only checked once UnverifiedBody has + // been consumed. Once EOF has been seen, the following fields are + // valid. (An authentication code failure is reported as a + // SignatureError error when reading from UnverifiedBody.) + SignatureError error // nil if the signature is good. + Signature *packet.Signature // the signature packet itself, if v4 (default) + SignatureV3 *packet.SignatureV3 // the signature packet if it is a v2 or v3 signature + + decrypted io.ReadCloser +} + +// A PromptFunction is used as a callback by functions that may need to decrypt +// a private key, or prompt for a passphrase. It is called with a list of +// acceptable, encrypted private keys and a boolean that indicates whether a +// passphrase is usable. It should either decrypt a private key or return a +// passphrase to try. If the decrypted private key or given passphrase isn't +// correct, the function will be called again, forever. Any error returned will +// be passed up. +type PromptFunction func(keys []Key, symmetric bool) ([]byte, error) + +// A keyEnvelopePair is used to store a private key with the envelope that +// contains a symmetric key, encrypted with that key. +type keyEnvelopePair struct { + key Key + encryptedKey *packet.EncryptedKey +} + +// ReadMessage parses an OpenPGP message that may be signed and/or encrypted. +// The given KeyRing should contain both public keys (for signature +// verification) and, possibly encrypted, private keys for decrypting. +// If config is nil, sensible defaults will be used. +func ReadMessage(r io.Reader, keyring KeyRing, prompt PromptFunction, config *packet.Config) (md *MessageDetails, err error) { + var p packet.Packet + + var symKeys []*packet.SymmetricKeyEncrypted + var pubKeys []keyEnvelopePair + var se *packet.SymmetricallyEncrypted + + packets := packet.NewReader(r) + md = new(MessageDetails) + md.IsEncrypted = true + + // The message, if encrypted, starts with a number of packets + // containing an encrypted decryption key. The decryption key is either + // encrypted to a public key, or with a passphrase. This loop + // collects these packets. +ParsePackets: + for { + p, err = packets.Next() + if err != nil { + return nil, err + } + switch p := p.(type) { + case *packet.SymmetricKeyEncrypted: + // This packet contains the decryption key encrypted with a passphrase. + md.IsSymmetricallyEncrypted = true + symKeys = append(symKeys, p) + case *packet.EncryptedKey: + // This packet contains the decryption key encrypted to a public key. + md.EncryptedToKeyIds = append(md.EncryptedToKeyIds, p.KeyId) + switch p.Algo { + case packet.PubKeyAlgoRSA, packet.PubKeyAlgoRSAEncryptOnly, packet.PubKeyAlgoElGamal: + break + default: + continue + } + var keys []Key + if p.KeyId == 0 { + keys = keyring.DecryptionKeys() + } else { + keys = keyring.KeysById(p.KeyId) + } + for _, k := range keys { + pubKeys = append(pubKeys, keyEnvelopePair{k, p}) + } + case *packet.SymmetricallyEncrypted: + se = p + break ParsePackets + case *packet.Compressed, *packet.LiteralData, *packet.OnePassSignature: + // This message isn't encrypted. + if len(symKeys) != 0 || len(pubKeys) != 0 { + return nil, errors.StructuralError("key material not followed by encrypted message") + } + packets.Unread(p) + return readSignedMessage(packets, nil, keyring) + } + } + + var candidates []Key + var decrypted io.ReadCloser + + // Now that we have the list of encrypted keys we need to decrypt at + // least one of them or, if we cannot, we need to call the prompt + // function so that it can decrypt a key or give us a passphrase. +FindKey: + for { + // See if any of the keys already have a private key available + candidates = candidates[:0] + candidateFingerprints := make(map[string]bool) + + for _, pk := range pubKeys { + if pk.key.PrivateKey == nil { + continue + } + if !pk.key.PrivateKey.Encrypted { + if len(pk.encryptedKey.Key) == 0 { + pk.encryptedKey.Decrypt(pk.key.PrivateKey, config) + } + if len(pk.encryptedKey.Key) == 0 { + continue + } + decrypted, err = se.Decrypt(pk.encryptedKey.CipherFunc, pk.encryptedKey.Key) + if err != nil && err != errors.ErrKeyIncorrect { + return nil, err + } + if decrypted != nil { + md.DecryptedWith = pk.key + break FindKey + } + } else { + fpr := string(pk.key.PublicKey.Fingerprint[:]) + if v := candidateFingerprints[fpr]; v { + continue + } + candidates = append(candidates, pk.key) + candidateFingerprints[fpr] = true + } + } + + if len(candidates) == 0 && len(symKeys) == 0 { + return nil, errors.ErrKeyIncorrect + } + + if prompt == nil { + return nil, errors.ErrKeyIncorrect + } + + passphrase, err := prompt(candidates, len(symKeys) != 0) + if err != nil { + return nil, err + } + + // Try the symmetric passphrase first + if len(symKeys) != 0 && passphrase != nil { + for _, s := range symKeys { + key, cipherFunc, err := s.Decrypt(passphrase) + if err == nil { + decrypted, err = se.Decrypt(cipherFunc, key) + if err != nil && err != errors.ErrKeyIncorrect { + return nil, err + } + if decrypted != nil { + break FindKey + } + } + + } + } + } + + md.decrypted = decrypted + if err := packets.Push(decrypted); err != nil { + return nil, err + } + return readSignedMessage(packets, md, keyring) +} + +// readSignedMessage reads a possibly signed message if mdin is non-zero then +// that structure is updated and returned. Otherwise a fresh MessageDetails is +// used. +func readSignedMessage(packets *packet.Reader, mdin *MessageDetails, keyring KeyRing) (md *MessageDetails, err error) { + if mdin == nil { + mdin = new(MessageDetails) + } + md = mdin + + var p packet.Packet + var h hash.Hash + var wrappedHash hash.Hash +FindLiteralData: + for { + p, err = packets.Next() + if err != nil { + return nil, err + } + switch p := p.(type) { + case *packet.Compressed: + if err := packets.Push(p.Body); err != nil { + return nil, err + } + case *packet.OnePassSignature: + if !p.IsLast { + return nil, errors.UnsupportedError("nested signatures") + } + + h, wrappedHash, err = hashForSignature(p.Hash, p.SigType) + if err != nil { + md = nil + return + } + + md.IsSigned = true + md.SignedByKeyId = p.KeyId + keys := keyring.KeysByIdUsage(p.KeyId, packet.KeyFlagSign) + if len(keys) > 0 { + md.SignedBy = &keys[0] + } + case *packet.LiteralData: + md.LiteralData = p + break FindLiteralData + } + } + + if md.SignedBy != nil { + md.UnverifiedBody = &signatureCheckReader{packets, h, wrappedHash, md} + } else if md.decrypted != nil { + md.UnverifiedBody = checkReader{md} + } else { + md.UnverifiedBody = md.LiteralData.Body + } + + return md, nil +} + +// hashForSignature returns a pair of hashes that can be used to verify a +// signature. The signature may specify that the contents of the signed message +// should be preprocessed (i.e. to normalize line endings). Thus this function +// returns two hashes. The second should be used to hash the message itself and +// performs any needed preprocessing. +func hashForSignature(hashId crypto.Hash, sigType packet.SignatureType) (hash.Hash, hash.Hash, error) { + if !hashId.Available() { + return nil, nil, errors.UnsupportedError("hash not available: " + strconv.Itoa(int(hashId))) + } + h := hashId.New() + + switch sigType { + case packet.SigTypeBinary: + return h, h, nil + case packet.SigTypeText: + return h, NewCanonicalTextHash(h), nil + } + + return nil, nil, errors.UnsupportedError("unsupported signature type: " + strconv.Itoa(int(sigType))) +} + +// checkReader wraps an io.Reader from a LiteralData packet. When it sees EOF +// it closes the ReadCloser from any SymmetricallyEncrypted packet to trigger +// MDC checks. +type checkReader struct { + md *MessageDetails +} + +func (cr checkReader) Read(buf []byte) (n int, err error) { + n, err = cr.md.LiteralData.Body.Read(buf) + if err == io.EOF { + mdcErr := cr.md.decrypted.Close() + if mdcErr != nil { + err = mdcErr + } + } + return +} + +// signatureCheckReader wraps an io.Reader from a LiteralData packet and hashes +// the data as it is read. When it sees an EOF from the underlying io.Reader +// it parses and checks a trailing Signature packet and triggers any MDC checks. +type signatureCheckReader struct { + packets *packet.Reader + h, wrappedHash hash.Hash + md *MessageDetails +} + +func (scr *signatureCheckReader) Read(buf []byte) (n int, err error) { + n, err = scr.md.LiteralData.Body.Read(buf) + scr.wrappedHash.Write(buf[:n]) + if err == io.EOF { + var p packet.Packet + p, scr.md.SignatureError = scr.packets.Next() + if scr.md.SignatureError != nil { + return + } + + var ok bool + if scr.md.Signature, ok = p.(*packet.Signature); ok { + scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignature(scr.h, scr.md.Signature) + } else if scr.md.SignatureV3, ok = p.(*packet.SignatureV3); ok { + scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignatureV3(scr.h, scr.md.SignatureV3) + } else { + scr.md.SignatureError = errors.StructuralError("LiteralData not followed by Signature") + return + } + + // The SymmetricallyEncrypted packet, if any, might have an + // unsigned hash of its own. In order to check this we need to + // close that Reader. + if scr.md.decrypted != nil { + mdcErr := scr.md.decrypted.Close() + if mdcErr != nil { + err = mdcErr + } + } + } + return +} + +// CheckDetachedSignature takes a signed file and a detached signature and +// returns the signer if the signature is valid. If the signer isn't known, +// ErrUnknownIssuer is returned. +func CheckDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signer *Entity, err error) { + var issuerKeyId uint64 + var hashFunc crypto.Hash + var sigType packet.SignatureType + var keys []Key + var p packet.Packet + + packets := packet.NewReader(signature) + for { + p, err = packets.Next() + if err == io.EOF { + return nil, errors.ErrUnknownIssuer + } + if err != nil { + return nil, err + } + + switch sig := p.(type) { + case *packet.Signature: + if sig.IssuerKeyId == nil { + return nil, errors.StructuralError("signature doesn't have an issuer") + } + issuerKeyId = *sig.IssuerKeyId + hashFunc = sig.Hash + sigType = sig.SigType + case *packet.SignatureV3: + issuerKeyId = sig.IssuerKeyId + hashFunc = sig.Hash + sigType = sig.SigType + default: + return nil, errors.StructuralError("non signature packet found") + } + + keys = keyring.KeysByIdUsage(issuerKeyId, packet.KeyFlagSign) + if len(keys) > 0 { + break + } + } + + if len(keys) == 0 { + panic("unreachable") + } + + h, wrappedHash, err := hashForSignature(hashFunc, sigType) + if err != nil { + return nil, err + } + + if _, err := io.Copy(wrappedHash, signed); err != nil && err != io.EOF { + return nil, err + } + + for _, key := range keys { + switch sig := p.(type) { + case *packet.Signature: + err = key.PublicKey.VerifySignature(h, sig) + case *packet.SignatureV3: + err = key.PublicKey.VerifySignatureV3(h, sig) + default: + panic("unreachable") + } + + if err == nil { + return key.Entity, nil + } + } + + return nil, err +} + +// CheckArmoredDetachedSignature performs the same actions as +// CheckDetachedSignature but expects the signature to be armored. +func CheckArmoredDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signer *Entity, err error) { + body, err := readArmored(signature, SignatureType) + if err != nil { + return + } + + return CheckDetachedSignature(keyring, signed, body) +} diff --git a/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go b/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go new file mode 100644 index 0000000..4b9a44c --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go @@ -0,0 +1,273 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package s2k implements the various OpenPGP string-to-key transforms as +// specified in RFC 4800 section 3.7.1. +package s2k // import "golang.org/x/crypto/openpgp/s2k" + +import ( + "crypto" + "hash" + "io" + "strconv" + + "golang.org/x/crypto/openpgp/errors" +) + +// Config collects configuration parameters for s2k key-stretching +// transformatioms. A nil *Config is valid and results in all default +// values. Currently, Config is used only by the Serialize function in +// this package. +type Config struct { + // Hash is the default hash function to be used. If + // nil, SHA1 is used. + Hash crypto.Hash + // S2KCount is only used for symmetric encryption. It + // determines the strength of the passphrase stretching when + // the said passphrase is hashed to produce a key. S2KCount + // should be between 1024 and 65011712, inclusive. If Config + // is nil or S2KCount is 0, the value 65536 used. Not all + // values in the above range can be represented. S2KCount will + // be rounded up to the next representable value if it cannot + // be encoded exactly. When set, it is strongly encrouraged to + // use a value that is at least 65536. See RFC 4880 Section + // 3.7.1.3. + S2KCount int +} + +func (c *Config) hash() crypto.Hash { + if c == nil || uint(c.Hash) == 0 { + // SHA1 is the historical default in this package. + return crypto.SHA1 + } + + return c.Hash +} + +func (c *Config) encodedCount() uint8 { + if c == nil || c.S2KCount == 0 { + return 96 // The common case. Correspoding to 65536 + } + + i := c.S2KCount + switch { + // Behave like GPG. Should we make 65536 the lowest value used? + case i < 1024: + i = 1024 + case i > 65011712: + i = 65011712 + } + + return encodeCount(i) +} + +// encodeCount converts an iterative "count" in the range 1024 to +// 65011712, inclusive, to an encoded count. The return value is the +// octet that is actually stored in the GPG file. encodeCount panics +// if i is not in the above range (encodedCount above takes care to +// pass i in the correct range). See RFC 4880 Section 3.7.7.1. +func encodeCount(i int) uint8 { + if i < 1024 || i > 65011712 { + panic("count arg i outside the required range") + } + + for encoded := 0; encoded < 256; encoded++ { + count := decodeCount(uint8(encoded)) + if count >= i { + return uint8(encoded) + } + } + + return 255 +} + +// decodeCount returns the s2k mode 3 iterative "count" corresponding to +// the encoded octet c. +func decodeCount(c uint8) int { + return (16 + int(c&15)) << (uint32(c>>4) + 6) +} + +// Simple writes to out the result of computing the Simple S2K function (RFC +// 4880, section 3.7.1.1) using the given hash and input passphrase. +func Simple(out []byte, h hash.Hash, in []byte) { + Salted(out, h, in, nil) +} + +var zero [1]byte + +// Salted writes to out the result of computing the Salted S2K function (RFC +// 4880, section 3.7.1.2) using the given hash, input passphrase and salt. +func Salted(out []byte, h hash.Hash, in []byte, salt []byte) { + done := 0 + var digest []byte + + for i := 0; done < len(out); i++ { + h.Reset() + for j := 0; j < i; j++ { + h.Write(zero[:]) + } + h.Write(salt) + h.Write(in) + digest = h.Sum(digest[:0]) + n := copy(out[done:], digest) + done += n + } +} + +// Iterated writes to out the result of computing the Iterated and Salted S2K +// function (RFC 4880, section 3.7.1.3) using the given hash, input passphrase, +// salt and iteration count. +func Iterated(out []byte, h hash.Hash, in []byte, salt []byte, count int) { + combined := make([]byte, len(in)+len(salt)) + copy(combined, salt) + copy(combined[len(salt):], in) + + if count < len(combined) { + count = len(combined) + } + + done := 0 + var digest []byte + for i := 0; done < len(out); i++ { + h.Reset() + for j := 0; j < i; j++ { + h.Write(zero[:]) + } + written := 0 + for written < count { + if written+len(combined) > count { + todo := count - written + h.Write(combined[:todo]) + written = count + } else { + h.Write(combined) + written += len(combined) + } + } + digest = h.Sum(digest[:0]) + n := copy(out[done:], digest) + done += n + } +} + +// Parse reads a binary specification for a string-to-key transformation from r +// and returns a function which performs that transform. +func Parse(r io.Reader) (f func(out, in []byte), err error) { + var buf [9]byte + + _, err = io.ReadFull(r, buf[:2]) + if err != nil { + return + } + + hash, ok := HashIdToHash(buf[1]) + if !ok { + return nil, errors.UnsupportedError("hash for S2K function: " + strconv.Itoa(int(buf[1]))) + } + if !hash.Available() { + return nil, errors.UnsupportedError("hash not available: " + strconv.Itoa(int(hash))) + } + h := hash.New() + + switch buf[0] { + case 0: + f := func(out, in []byte) { + Simple(out, h, in) + } + return f, nil + case 1: + _, err = io.ReadFull(r, buf[:8]) + if err != nil { + return + } + f := func(out, in []byte) { + Salted(out, h, in, buf[:8]) + } + return f, nil + case 3: + _, err = io.ReadFull(r, buf[:9]) + if err != nil { + return + } + count := decodeCount(buf[8]) + f := func(out, in []byte) { + Iterated(out, h, in, buf[:8], count) + } + return f, nil + } + + return nil, errors.UnsupportedError("S2K function") +} + +// Serialize salts and stretches the given passphrase and writes the +// resulting key into key. It also serializes an S2K descriptor to +// w. The key stretching can be configured with c, which may be +// nil. In that case, sensible defaults will be used. +func Serialize(w io.Writer, key []byte, rand io.Reader, passphrase []byte, c *Config) error { + var buf [11]byte + buf[0] = 3 /* iterated and salted */ + buf[1], _ = HashToHashId(c.hash()) + salt := buf[2:10] + if _, err := io.ReadFull(rand, salt); err != nil { + return err + } + encodedCount := c.encodedCount() + count := decodeCount(encodedCount) + buf[10] = encodedCount + if _, err := w.Write(buf[:]); err != nil { + return err + } + + Iterated(key, c.hash().New(), passphrase, salt, count) + return nil +} + +// hashToHashIdMapping contains pairs relating OpenPGP's hash identifier with +// Go's crypto.Hash type. See RFC 4880, section 9.4. +var hashToHashIdMapping = []struct { + id byte + hash crypto.Hash + name string +}{ + {1, crypto.MD5, "MD5"}, + {2, crypto.SHA1, "SHA1"}, + {3, crypto.RIPEMD160, "RIPEMD160"}, + {8, crypto.SHA256, "SHA256"}, + {9, crypto.SHA384, "SHA384"}, + {10, crypto.SHA512, "SHA512"}, + {11, crypto.SHA224, "SHA224"}, +} + +// HashIdToHash returns a crypto.Hash which corresponds to the given OpenPGP +// hash id. +func HashIdToHash(id byte) (h crypto.Hash, ok bool) { + for _, m := range hashToHashIdMapping { + if m.id == id { + return m.hash, true + } + } + return 0, false +} + +// HashIdToString returns the name of the hash function corresponding to the +// given OpenPGP hash id. +func HashIdToString(id byte) (name string, ok bool) { + for _, m := range hashToHashIdMapping { + if m.id == id { + return m.name, true + } + } + + return "", false +} + +// HashIdToHash returns an OpenPGP hash id which corresponds the given Hash. +func HashToHashId(h crypto.Hash) (id byte, ok bool) { + for _, m := range hashToHashIdMapping { + if m.hash == h { + return m.id, true + } + } + return 0, false +} diff --git a/vendor/golang.org/x/crypto/openpgp/write.go b/vendor/golang.org/x/crypto/openpgp/write.go new file mode 100644 index 0000000..65a304c --- /dev/null +++ b/vendor/golang.org/x/crypto/openpgp/write.go @@ -0,0 +1,378 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package openpgp + +import ( + "crypto" + "hash" + "io" + "strconv" + "time" + + "golang.org/x/crypto/openpgp/armor" + "golang.org/x/crypto/openpgp/errors" + "golang.org/x/crypto/openpgp/packet" + "golang.org/x/crypto/openpgp/s2k" +) + +// DetachSign signs message with the private key from signer (which must +// already have been decrypted) and writes the signature to w. +// If config is nil, sensible defaults will be used. +func DetachSign(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error { + return detachSign(w, signer, message, packet.SigTypeBinary, config) +} + +// ArmoredDetachSign signs message with the private key from signer (which +// must already have been decrypted) and writes an armored signature to w. +// If config is nil, sensible defaults will be used. +func ArmoredDetachSign(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) (err error) { + return armoredDetachSign(w, signer, message, packet.SigTypeBinary, config) +} + +// DetachSignText signs message (after canonicalising the line endings) with +// the private key from signer (which must already have been decrypted) and +// writes the signature to w. +// If config is nil, sensible defaults will be used. +func DetachSignText(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error { + return detachSign(w, signer, message, packet.SigTypeText, config) +} + +// ArmoredDetachSignText signs message (after canonicalising the line endings) +// with the private key from signer (which must already have been decrypted) +// and writes an armored signature to w. +// If config is nil, sensible defaults will be used. +func ArmoredDetachSignText(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error { + return armoredDetachSign(w, signer, message, packet.SigTypeText, config) +} + +func armoredDetachSign(w io.Writer, signer *Entity, message io.Reader, sigType packet.SignatureType, config *packet.Config) (err error) { + out, err := armor.Encode(w, SignatureType, nil) + if err != nil { + return + } + err = detachSign(out, signer, message, sigType, config) + if err != nil { + return + } + return out.Close() +} + +func detachSign(w io.Writer, signer *Entity, message io.Reader, sigType packet.SignatureType, config *packet.Config) (err error) { + if signer.PrivateKey == nil { + return errors.InvalidArgumentError("signing key doesn't have a private key") + } + if signer.PrivateKey.Encrypted { + return errors.InvalidArgumentError("signing key is encrypted") + } + + sig := new(packet.Signature) + sig.SigType = sigType + sig.PubKeyAlgo = signer.PrivateKey.PubKeyAlgo + sig.Hash = config.Hash() + sig.CreationTime = config.Now() + sig.IssuerKeyId = &signer.PrivateKey.KeyId + + h, wrappedHash, err := hashForSignature(sig.Hash, sig.SigType) + if err != nil { + return + } + io.Copy(wrappedHash, message) + + err = sig.Sign(h, signer.PrivateKey, config) + if err != nil { + return + } + + return sig.Serialize(w) +} + +// FileHints contains metadata about encrypted files. This metadata is, itself, +// encrypted. +type FileHints struct { + // IsBinary can be set to hint that the contents are binary data. + IsBinary bool + // FileName hints at the name of the file that should be written. It's + // truncated to 255 bytes if longer. It may be empty to suggest that the + // file should not be written to disk. It may be equal to "_CONSOLE" to + // suggest the data should not be written to disk. + FileName string + // ModTime contains the modification time of the file, or the zero time if not applicable. + ModTime time.Time +} + +// SymmetricallyEncrypt acts like gpg -c: it encrypts a file with a passphrase. +// The resulting WriteCloser must be closed after the contents of the file have +// been written. +// If config is nil, sensible defaults will be used. +func SymmetricallyEncrypt(ciphertext io.Writer, passphrase []byte, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) { + if hints == nil { + hints = &FileHints{} + } + + key, err := packet.SerializeSymmetricKeyEncrypted(ciphertext, passphrase, config) + if err != nil { + return + } + w, err := packet.SerializeSymmetricallyEncrypted(ciphertext, config.Cipher(), key, config) + if err != nil { + return + } + + literaldata := w + if algo := config.Compression(); algo != packet.CompressionNone { + var compConfig *packet.CompressionConfig + if config != nil { + compConfig = config.CompressionConfig + } + literaldata, err = packet.SerializeCompressed(w, algo, compConfig) + if err != nil { + return + } + } + + var epochSeconds uint32 + if !hints.ModTime.IsZero() { + epochSeconds = uint32(hints.ModTime.Unix()) + } + return packet.SerializeLiteral(literaldata, hints.IsBinary, hints.FileName, epochSeconds) +} + +// intersectPreferences mutates and returns a prefix of a that contains only +// the values in the intersection of a and b. The order of a is preserved. +func intersectPreferences(a []uint8, b []uint8) (intersection []uint8) { + var j int + for _, v := range a { + for _, v2 := range b { + if v == v2 { + a[j] = v + j++ + break + } + } + } + + return a[:j] +} + +func hashToHashId(h crypto.Hash) uint8 { + v, ok := s2k.HashToHashId(h) + if !ok { + panic("tried to convert unknown hash") + } + return v +} + +// Encrypt encrypts a message to a number of recipients and, optionally, signs +// it. hints contains optional information, that is also encrypted, that aids +// the recipients in processing the message. The resulting WriteCloser must +// be closed after the contents of the file have been written. +// If config is nil, sensible defaults will be used. +func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) { + var signer *packet.PrivateKey + if signed != nil { + signKey, ok := signed.signingKey(config.Now()) + if !ok { + return nil, errors.InvalidArgumentError("no valid signing keys") + } + signer = signKey.PrivateKey + if signer == nil { + return nil, errors.InvalidArgumentError("no private key in signing key") + } + if signer.Encrypted { + return nil, errors.InvalidArgumentError("signing key must be decrypted") + } + } + + // These are the possible ciphers that we'll use for the message. + candidateCiphers := []uint8{ + uint8(packet.CipherAES128), + uint8(packet.CipherAES256), + uint8(packet.CipherCAST5), + } + // These are the possible hash functions that we'll use for the signature. + candidateHashes := []uint8{ + hashToHashId(crypto.SHA256), + hashToHashId(crypto.SHA512), + hashToHashId(crypto.SHA1), + hashToHashId(crypto.RIPEMD160), + } + // In the event that a recipient doesn't specify any supported ciphers + // or hash functions, these are the ones that we assume that every + // implementation supports. + defaultCiphers := candidateCiphers[len(candidateCiphers)-1:] + defaultHashes := candidateHashes[len(candidateHashes)-1:] + + encryptKeys := make([]Key, len(to)) + for i := range to { + var ok bool + encryptKeys[i], ok = to[i].encryptionKey(config.Now()) + if !ok { + return nil, errors.InvalidArgumentError("cannot encrypt a message to key id " + strconv.FormatUint(to[i].PrimaryKey.KeyId, 16) + " because it has no encryption keys") + } + + sig := to[i].primaryIdentity().SelfSignature + + preferredSymmetric := sig.PreferredSymmetric + if len(preferredSymmetric) == 0 { + preferredSymmetric = defaultCiphers + } + preferredHashes := sig.PreferredHash + if len(preferredHashes) == 0 { + preferredHashes = defaultHashes + } + candidateCiphers = intersectPreferences(candidateCiphers, preferredSymmetric) + candidateHashes = intersectPreferences(candidateHashes, preferredHashes) + } + + if len(candidateCiphers) == 0 || len(candidateHashes) == 0 { + return nil, errors.InvalidArgumentError("cannot encrypt because recipient set shares no common algorithms") + } + + cipher := packet.CipherFunction(candidateCiphers[0]) + // If the cipher specified by config is a candidate, we'll use that. + configuredCipher := config.Cipher() + for _, c := range candidateCiphers { + cipherFunc := packet.CipherFunction(c) + if cipherFunc == configuredCipher { + cipher = cipherFunc + break + } + } + + var hash crypto.Hash + for _, hashId := range candidateHashes { + if h, ok := s2k.HashIdToHash(hashId); ok && h.Available() { + hash = h + break + } + } + + // If the hash specified by config is a candidate, we'll use that. + if configuredHash := config.Hash(); configuredHash.Available() { + for _, hashId := range candidateHashes { + if h, ok := s2k.HashIdToHash(hashId); ok && h == configuredHash { + hash = h + break + } + } + } + + if hash == 0 { + hashId := candidateHashes[0] + name, ok := s2k.HashIdToString(hashId) + if !ok { + name = "#" + strconv.Itoa(int(hashId)) + } + return nil, errors.InvalidArgumentError("cannot encrypt because no candidate hash functions are compiled in. (Wanted " + name + " in this case.)") + } + + symKey := make([]byte, cipher.KeySize()) + if _, err := io.ReadFull(config.Random(), symKey); err != nil { + return nil, err + } + + for _, key := range encryptKeys { + if err := packet.SerializeEncryptedKey(ciphertext, key.PublicKey, cipher, symKey, config); err != nil { + return nil, err + } + } + + encryptedData, err := packet.SerializeSymmetricallyEncrypted(ciphertext, cipher, symKey, config) + if err != nil { + return + } + + if signer != nil { + ops := &packet.OnePassSignature{ + SigType: packet.SigTypeBinary, + Hash: hash, + PubKeyAlgo: signer.PubKeyAlgo, + KeyId: signer.KeyId, + IsLast: true, + } + if err := ops.Serialize(encryptedData); err != nil { + return nil, err + } + } + + if hints == nil { + hints = &FileHints{} + } + + w := encryptedData + if signer != nil { + // If we need to write a signature packet after the literal + // data then we need to stop literalData from closing + // encryptedData. + w = noOpCloser{encryptedData} + + } + var epochSeconds uint32 + if !hints.ModTime.IsZero() { + epochSeconds = uint32(hints.ModTime.Unix()) + } + literalData, err := packet.SerializeLiteral(w, hints.IsBinary, hints.FileName, epochSeconds) + if err != nil { + return nil, err + } + + if signer != nil { + return signatureWriter{encryptedData, literalData, hash, hash.New(), signer, config}, nil + } + return literalData, nil +} + +// signatureWriter hashes the contents of a message while passing it along to +// literalData. When closed, it closes literalData, writes a signature packet +// to encryptedData and then also closes encryptedData. +type signatureWriter struct { + encryptedData io.WriteCloser + literalData io.WriteCloser + hashType crypto.Hash + h hash.Hash + signer *packet.PrivateKey + config *packet.Config +} + +func (s signatureWriter) Write(data []byte) (int, error) { + s.h.Write(data) + return s.literalData.Write(data) +} + +func (s signatureWriter) Close() error { + sig := &packet.Signature{ + SigType: packet.SigTypeBinary, + PubKeyAlgo: s.signer.PubKeyAlgo, + Hash: s.hashType, + CreationTime: s.config.Now(), + IssuerKeyId: &s.signer.KeyId, + } + + if err := sig.Sign(s.h, s.signer, s.config); err != nil { + return err + } + if err := s.literalData.Close(); err != nil { + return err + } + if err := sig.Serialize(s.encryptedData); err != nil { + return err + } + return s.encryptedData.Close() +} + +// noOpCloser is like an ioutil.NopCloser, but for an io.Writer. +// TODO: we have two of these in OpenPGP packages alone. This probably needs +// to be promoted somewhere more common. +type noOpCloser struct { + w io.Writer +} + +func (c noOpCloser) Write(data []byte) (n int, err error) { + return c.w.Write(data) +} + +func (c noOpCloser) Close() error { + return nil +} diff --git a/vendor/golang.org/x/crypto/ripemd160/ripemd160.go b/vendor/golang.org/x/crypto/ripemd160/ripemd160.go new file mode 100644 index 0000000..6c6e842 --- /dev/null +++ b/vendor/golang.org/x/crypto/ripemd160/ripemd160.go @@ -0,0 +1,120 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package ripemd160 implements the RIPEMD-160 hash algorithm. +package ripemd160 // import "golang.org/x/crypto/ripemd160" + +// RIPEMD-160 is designed by by Hans Dobbertin, Antoon Bosselaers, and Bart +// Preneel with specifications available at: +// http://homes.esat.kuleuven.be/~cosicart/pdf/AB-9601/AB-9601.pdf. + +import ( + "crypto" + "hash" +) + +func init() { + crypto.RegisterHash(crypto.RIPEMD160, New) +} + +// The size of the checksum in bytes. +const Size = 20 + +// The block size of the hash algorithm in bytes. +const BlockSize = 64 + +const ( + _s0 = 0x67452301 + _s1 = 0xefcdab89 + _s2 = 0x98badcfe + _s3 = 0x10325476 + _s4 = 0xc3d2e1f0 +) + +// digest represents the partial evaluation of a checksum. +type digest struct { + s [5]uint32 // running context + x [BlockSize]byte // temporary buffer + nx int // index into x + tc uint64 // total count of bytes processed +} + +func (d *digest) Reset() { + d.s[0], d.s[1], d.s[2], d.s[3], d.s[4] = _s0, _s1, _s2, _s3, _s4 + d.nx = 0 + d.tc = 0 +} + +// New returns a new hash.Hash computing the checksum. +func New() hash.Hash { + result := new(digest) + result.Reset() + return result +} + +func (d *digest) Size() int { return Size } + +func (d *digest) BlockSize() int { return BlockSize } + +func (d *digest) Write(p []byte) (nn int, err error) { + nn = len(p) + d.tc += uint64(nn) + if d.nx > 0 { + n := len(p) + if n > BlockSize-d.nx { + n = BlockSize - d.nx + } + for i := 0; i < n; i++ { + d.x[d.nx+i] = p[i] + } + d.nx += n + if d.nx == BlockSize { + _Block(d, d.x[0:]) + d.nx = 0 + } + p = p[n:] + } + n := _Block(d, p) + p = p[n:] + if len(p) > 0 { + d.nx = copy(d.x[:], p) + } + return +} + +func (d0 *digest) Sum(in []byte) []byte { + // Make a copy of d0 so that caller can keep writing and summing. + d := *d0 + + // Padding. Add a 1 bit and 0 bits until 56 bytes mod 64. + tc := d.tc + var tmp [64]byte + tmp[0] = 0x80 + if tc%64 < 56 { + d.Write(tmp[0 : 56-tc%64]) + } else { + d.Write(tmp[0 : 64+56-tc%64]) + } + + // Length in bits. + tc <<= 3 + for i := uint(0); i < 8; i++ { + tmp[i] = byte(tc >> (8 * i)) + } + d.Write(tmp[0:8]) + + if d.nx != 0 { + panic("d.nx != 0") + } + + var digest [Size]byte + for i, s := range d.s { + digest[i*4] = byte(s) + digest[i*4+1] = byte(s >> 8) + digest[i*4+2] = byte(s >> 16) + digest[i*4+3] = byte(s >> 24) + } + + return append(in, digest[:]...) +} diff --git a/vendor/golang.org/x/crypto/ripemd160/ripemd160block.go b/vendor/golang.org/x/crypto/ripemd160/ripemd160block.go new file mode 100644 index 0000000..e0edc02 --- /dev/null +++ b/vendor/golang.org/x/crypto/ripemd160/ripemd160block.go @@ -0,0 +1,165 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// RIPEMD-160 block step. +// In its own file so that a faster assembly or C version +// can be substituted easily. + +package ripemd160 + +import ( + "math/bits" +) + +// work buffer indices and roll amounts for one line +var _n = [80]uint{ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, + 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, + 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, + 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13, +} + +var _r = [80]uint{ + 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, + 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, + 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, + 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, + 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6, +} + +// same for the other parallel one +var n_ = [80]uint{ + 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, + 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, + 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, + 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, + 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11, +} + +var r_ = [80]uint{ + 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, + 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, + 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, + 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, + 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11, +} + +func _Block(md *digest, p []byte) int { + n := 0 + var x [16]uint32 + var alpha, beta uint32 + for len(p) >= BlockSize { + a, b, c, d, e := md.s[0], md.s[1], md.s[2], md.s[3], md.s[4] + aa, bb, cc, dd, ee := a, b, c, d, e + j := 0 + for i := 0; i < 16; i++ { + x[i] = uint32(p[j]) | uint32(p[j+1])<<8 | uint32(p[j+2])<<16 | uint32(p[j+3])<<24 + j += 4 + } + + // round 1 + i := 0 + for i < 16 { + alpha = a + (b ^ c ^ d) + x[_n[i]] + s := int(_r[i]) + alpha = bits.RotateLeft32(alpha, s) + e + beta = bits.RotateLeft32(c, 10) + a, b, c, d, e = e, alpha, b, beta, d + + // parallel line + alpha = aa + (bb ^ (cc | ^dd)) + x[n_[i]] + 0x50a28be6 + s = int(r_[i]) + alpha = bits.RotateLeft32(alpha, s) + ee + beta = bits.RotateLeft32(cc, 10) + aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd + + i++ + } + + // round 2 + for i < 32 { + alpha = a + (b&c | ^b&d) + x[_n[i]] + 0x5a827999 + s := int(_r[i]) + alpha = bits.RotateLeft32(alpha, s) + e + beta = bits.RotateLeft32(c, 10) + a, b, c, d, e = e, alpha, b, beta, d + + // parallel line + alpha = aa + (bb&dd | cc&^dd) + x[n_[i]] + 0x5c4dd124 + s = int(r_[i]) + alpha = bits.RotateLeft32(alpha, s) + ee + beta = bits.RotateLeft32(cc, 10) + aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd + + i++ + } + + // round 3 + for i < 48 { + alpha = a + (b | ^c ^ d) + x[_n[i]] + 0x6ed9eba1 + s := int(_r[i]) + alpha = bits.RotateLeft32(alpha, s) + e + beta = bits.RotateLeft32(c, 10) + a, b, c, d, e = e, alpha, b, beta, d + + // parallel line + alpha = aa + (bb | ^cc ^ dd) + x[n_[i]] + 0x6d703ef3 + s = int(r_[i]) + alpha = bits.RotateLeft32(alpha, s) + ee + beta = bits.RotateLeft32(cc, 10) + aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd + + i++ + } + + // round 4 + for i < 64 { + alpha = a + (b&d | c&^d) + x[_n[i]] + 0x8f1bbcdc + s := int(_r[i]) + alpha = bits.RotateLeft32(alpha, s) + e + beta = bits.RotateLeft32(c, 10) + a, b, c, d, e = e, alpha, b, beta, d + + // parallel line + alpha = aa + (bb&cc | ^bb&dd) + x[n_[i]] + 0x7a6d76e9 + s = int(r_[i]) + alpha = bits.RotateLeft32(alpha, s) + ee + beta = bits.RotateLeft32(cc, 10) + aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd + + i++ + } + + // round 5 + for i < 80 { + alpha = a + (b ^ (c | ^d)) + x[_n[i]] + 0xa953fd4e + s := int(_r[i]) + alpha = bits.RotateLeft32(alpha, s) + e + beta = bits.RotateLeft32(c, 10) + a, b, c, d, e = e, alpha, b, beta, d + + // parallel line + alpha = aa + (bb ^ cc ^ dd) + x[n_[i]] + s = int(r_[i]) + alpha = bits.RotateLeft32(alpha, s) + ee + beta = bits.RotateLeft32(cc, 10) + aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd + + i++ + } + + // combine results + dd += c + md.s[1] + md.s[1] = md.s[2] + d + ee + md.s[2] = md.s[3] + e + aa + md.s[3] = md.s[4] + a + bb + md.s[4] = md.s[0] + b + cc + md.s[0] = dd + + p = p[BlockSize:] + n += BlockSize + } + return n +} diff --git a/vendor/golang.org/x/net/LICENSE b/vendor/golang.org/x/net/LICENSE new file mode 100644 index 0000000..6a66aea --- /dev/null +++ b/vendor/golang.org/x/net/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2009 The Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/golang.org/x/net/PATENTS b/vendor/golang.org/x/net/PATENTS new file mode 100644 index 0000000..7330990 --- /dev/null +++ b/vendor/golang.org/x/net/PATENTS @@ -0,0 +1,22 @@ +Additional IP Rights Grant (Patents) + +"This implementation" means the copyrightable works distributed by +Google as part of the Go project. + +Google hereby grants to You a perpetual, worldwide, non-exclusive, +no-charge, royalty-free, irrevocable (except as stated in this section) +patent license to make, have made, use, offer to sell, sell, import, +transfer and otherwise run, modify and propagate the contents of this +implementation of Go, where such license applies only to those patent +claims, both currently owned or controlled by Google and acquired in +the future, licensable by Google that are necessarily infringed by this +implementation of Go. This grant does not include claims that would be +infringed only as a consequence of further modification of this +implementation. If you or your agent or exclusive licensee institute or +order or agree to the institution of patent litigation against any +entity (including a cross-claim or counterclaim in a lawsuit) alleging +that this implementation of Go or any code incorporated within this +implementation of Go constitutes direct or contributory patent +infringement, or inducement of patent infringement, then any patent +rights granted to you under this License for this implementation of Go +shall terminate as of the date such litigation is filed. diff --git a/vendor/golang.org/x/net/context/context.go b/vendor/golang.org/x/net/context/context.go new file mode 100644 index 0000000..a3c021d --- /dev/null +++ b/vendor/golang.org/x/net/context/context.go @@ -0,0 +1,56 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package context defines the Context type, which carries deadlines, +// cancelation signals, and other request-scoped values across API boundaries +// and between processes. +// As of Go 1.7 this package is available in the standard library under the +// name context. https://golang.org/pkg/context. +// +// Incoming requests to a server should create a Context, and outgoing calls to +// servers should accept a Context. The chain of function calls between must +// propagate the Context, optionally replacing it with a modified copy created +// using WithDeadline, WithTimeout, WithCancel, or WithValue. +// +// Programs that use Contexts should follow these rules to keep interfaces +// consistent across packages and enable static analysis tools to check context +// propagation: +// +// Do not store Contexts inside a struct type; instead, pass a Context +// explicitly to each function that needs it. The Context should be the first +// parameter, typically named ctx: +// +// func DoSomething(ctx context.Context, arg Arg) error { +// // ... use ctx ... +// } +// +// Do not pass a nil Context, even if a function permits it. Pass context.TODO +// if you are unsure about which Context to use. +// +// Use context Values only for request-scoped data that transits processes and +// APIs, not for passing optional parameters to functions. +// +// The same Context may be passed to functions running in different goroutines; +// Contexts are safe for simultaneous use by multiple goroutines. +// +// See http://blog.golang.org/context for example code for a server that uses +// Contexts. +package context // import "golang.org/x/net/context" + +// Background returns a non-nil, empty Context. It is never canceled, has no +// values, and has no deadline. It is typically used by the main function, +// initialization, and tests, and as the top-level Context for incoming +// requests. +func Background() Context { + return background +} + +// TODO returns a non-nil, empty Context. Code should use context.TODO when +// it's unclear which Context to use or it is not yet available (because the +// surrounding function has not yet been extended to accept a Context +// parameter). TODO is recognized by static analysis tools that determine +// whether Contexts are propagated correctly in a program. +func TODO() Context { + return todo +} diff --git a/vendor/golang.org/x/net/context/go17.go b/vendor/golang.org/x/net/context/go17.go new file mode 100644 index 0000000..d20f52b --- /dev/null +++ b/vendor/golang.org/x/net/context/go17.go @@ -0,0 +1,72 @@ +// Copyright 2016 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.7 + +package context + +import ( + "context" // standard library's context, as of Go 1.7 + "time" +) + +var ( + todo = context.TODO() + background = context.Background() +) + +// Canceled is the error returned by Context.Err when the context is canceled. +var Canceled = context.Canceled + +// DeadlineExceeded is the error returned by Context.Err when the context's +// deadline passes. +var DeadlineExceeded = context.DeadlineExceeded + +// WithCancel returns a copy of parent with a new Done channel. The returned +// context's Done channel is closed when the returned cancel function is called +// or when the parent context's Done channel is closed, whichever happens first. +// +// Canceling this context releases resources associated with it, so code should +// call cancel as soon as the operations running in this Context complete. +func WithCancel(parent Context) (ctx Context, cancel CancelFunc) { + ctx, f := context.WithCancel(parent) + return ctx, CancelFunc(f) +} + +// WithDeadline returns a copy of the parent context with the deadline adjusted +// to be no later than d. If the parent's deadline is already earlier than d, +// WithDeadline(parent, d) is semantically equivalent to parent. The returned +// context's Done channel is closed when the deadline expires, when the returned +// cancel function is called, or when the parent context's Done channel is +// closed, whichever happens first. +// +// Canceling this context releases resources associated with it, so code should +// call cancel as soon as the operations running in this Context complete. +func WithDeadline(parent Context, deadline time.Time) (Context, CancelFunc) { + ctx, f := context.WithDeadline(parent, deadline) + return ctx, CancelFunc(f) +} + +// WithTimeout returns WithDeadline(parent, time.Now().Add(timeout)). +// +// Canceling this context releases resources associated with it, so code should +// call cancel as soon as the operations running in this Context complete: +// +// func slowOperationWithTimeout(ctx context.Context) (Result, error) { +// ctx, cancel := context.WithTimeout(ctx, 100*time.Millisecond) +// defer cancel() // releases resources if slowOperation completes before timeout elapses +// return slowOperation(ctx) +// } +func WithTimeout(parent Context, timeout time.Duration) (Context, CancelFunc) { + return WithDeadline(parent, time.Now().Add(timeout)) +} + +// WithValue returns a copy of parent in which the value associated with key is +// val. +// +// Use context Values only for request-scoped data that transits processes and +// APIs, not for passing optional parameters to functions. +func WithValue(parent Context, key interface{}, val interface{}) Context { + return context.WithValue(parent, key, val) +} diff --git a/vendor/golang.org/x/net/context/go19.go b/vendor/golang.org/x/net/context/go19.go new file mode 100644 index 0000000..d88bd1d --- /dev/null +++ b/vendor/golang.org/x/net/context/go19.go @@ -0,0 +1,20 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.9 + +package context + +import "context" // standard library's context, as of Go 1.7 + +// A Context carries a deadline, a cancelation signal, and other values across +// API boundaries. +// +// Context's methods may be called by multiple goroutines simultaneously. +type Context = context.Context + +// A CancelFunc tells an operation to abandon its work. +// A CancelFunc does not wait for the work to stop. +// After the first call, subsequent calls to a CancelFunc do nothing. +type CancelFunc = context.CancelFunc diff --git a/vendor/golang.org/x/net/context/pre_go17.go b/vendor/golang.org/x/net/context/pre_go17.go new file mode 100644 index 0000000..0f35592 --- /dev/null +++ b/vendor/golang.org/x/net/context/pre_go17.go @@ -0,0 +1,300 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !go1.7 + +package context + +import ( + "errors" + "fmt" + "sync" + "time" +) + +// An emptyCtx is never canceled, has no values, and has no deadline. It is not +// struct{}, since vars of this type must have distinct addresses. +type emptyCtx int + +func (*emptyCtx) Deadline() (deadline time.Time, ok bool) { + return +} + +func (*emptyCtx) Done() <-chan struct{} { + return nil +} + +func (*emptyCtx) Err() error { + return nil +} + +func (*emptyCtx) Value(key interface{}) interface{} { + return nil +} + +func (e *emptyCtx) String() string { + switch e { + case background: + return "context.Background" + case todo: + return "context.TODO" + } + return "unknown empty Context" +} + +var ( + background = new(emptyCtx) + todo = new(emptyCtx) +) + +// Canceled is the error returned by Context.Err when the context is canceled. +var Canceled = errors.New("context canceled") + +// DeadlineExceeded is the error returned by Context.Err when the context's +// deadline passes. +var DeadlineExceeded = errors.New("context deadline exceeded") + +// WithCancel returns a copy of parent with a new Done channel. The returned +// context's Done channel is closed when the returned cancel function is called +// or when the parent context's Done channel is closed, whichever happens first. +// +// Canceling this context releases resources associated with it, so code should +// call cancel as soon as the operations running in this Context complete. +func WithCancel(parent Context) (ctx Context, cancel CancelFunc) { + c := newCancelCtx(parent) + propagateCancel(parent, c) + return c, func() { c.cancel(true, Canceled) } +} + +// newCancelCtx returns an initialized cancelCtx. +func newCancelCtx(parent Context) *cancelCtx { + return &cancelCtx{ + Context: parent, + done: make(chan struct{}), + } +} + +// propagateCancel arranges for child to be canceled when parent is. +func propagateCancel(parent Context, child canceler) { + if parent.Done() == nil { + return // parent is never canceled + } + if p, ok := parentCancelCtx(parent); ok { + p.mu.Lock() + if p.err != nil { + // parent has already been canceled + child.cancel(false, p.err) + } else { + if p.children == nil { + p.children = make(map[canceler]bool) + } + p.children[child] = true + } + p.mu.Unlock() + } else { + go func() { + select { + case <-parent.Done(): + child.cancel(false, parent.Err()) + case <-child.Done(): + } + }() + } +} + +// parentCancelCtx follows a chain of parent references until it finds a +// *cancelCtx. This function understands how each of the concrete types in this +// package represents its parent. +func parentCancelCtx(parent Context) (*cancelCtx, bool) { + for { + switch c := parent.(type) { + case *cancelCtx: + return c, true + case *timerCtx: + return c.cancelCtx, true + case *valueCtx: + parent = c.Context + default: + return nil, false + } + } +} + +// removeChild removes a context from its parent. +func removeChild(parent Context, child canceler) { + p, ok := parentCancelCtx(parent) + if !ok { + return + } + p.mu.Lock() + if p.children != nil { + delete(p.children, child) + } + p.mu.Unlock() +} + +// A canceler is a context type that can be canceled directly. The +// implementations are *cancelCtx and *timerCtx. +type canceler interface { + cancel(removeFromParent bool, err error) + Done() <-chan struct{} +} + +// A cancelCtx can be canceled. When canceled, it also cancels any children +// that implement canceler. +type cancelCtx struct { + Context + + done chan struct{} // closed by the first cancel call. + + mu sync.Mutex + children map[canceler]bool // set to nil by the first cancel call + err error // set to non-nil by the first cancel call +} + +func (c *cancelCtx) Done() <-chan struct{} { + return c.done +} + +func (c *cancelCtx) Err() error { + c.mu.Lock() + defer c.mu.Unlock() + return c.err +} + +func (c *cancelCtx) String() string { + return fmt.Sprintf("%v.WithCancel", c.Context) +} + +// cancel closes c.done, cancels each of c's children, and, if +// removeFromParent is true, removes c from its parent's children. +func (c *cancelCtx) cancel(removeFromParent bool, err error) { + if err == nil { + panic("context: internal error: missing cancel error") + } + c.mu.Lock() + if c.err != nil { + c.mu.Unlock() + return // already canceled + } + c.err = err + close(c.done) + for child := range c.children { + // NOTE: acquiring the child's lock while holding parent's lock. + child.cancel(false, err) + } + c.children = nil + c.mu.Unlock() + + if removeFromParent { + removeChild(c.Context, c) + } +} + +// WithDeadline returns a copy of the parent context with the deadline adjusted +// to be no later than d. If the parent's deadline is already earlier than d, +// WithDeadline(parent, d) is semantically equivalent to parent. The returned +// context's Done channel is closed when the deadline expires, when the returned +// cancel function is called, or when the parent context's Done channel is +// closed, whichever happens first. +// +// Canceling this context releases resources associated with it, so code should +// call cancel as soon as the operations running in this Context complete. +func WithDeadline(parent Context, deadline time.Time) (Context, CancelFunc) { + if cur, ok := parent.Deadline(); ok && cur.Before(deadline) { + // The current deadline is already sooner than the new one. + return WithCancel(parent) + } + c := &timerCtx{ + cancelCtx: newCancelCtx(parent), + deadline: deadline, + } + propagateCancel(parent, c) + d := deadline.Sub(time.Now()) + if d <= 0 { + c.cancel(true, DeadlineExceeded) // deadline has already passed + return c, func() { c.cancel(true, Canceled) } + } + c.mu.Lock() + defer c.mu.Unlock() + if c.err == nil { + c.timer = time.AfterFunc(d, func() { + c.cancel(true, DeadlineExceeded) + }) + } + return c, func() { c.cancel(true, Canceled) } +} + +// A timerCtx carries a timer and a deadline. It embeds a cancelCtx to +// implement Done and Err. It implements cancel by stopping its timer then +// delegating to cancelCtx.cancel. +type timerCtx struct { + *cancelCtx + timer *time.Timer // Under cancelCtx.mu. + + deadline time.Time +} + +func (c *timerCtx) Deadline() (deadline time.Time, ok bool) { + return c.deadline, true +} + +func (c *timerCtx) String() string { + return fmt.Sprintf("%v.WithDeadline(%s [%s])", c.cancelCtx.Context, c.deadline, c.deadline.Sub(time.Now())) +} + +func (c *timerCtx) cancel(removeFromParent bool, err error) { + c.cancelCtx.cancel(false, err) + if removeFromParent { + // Remove this timerCtx from its parent cancelCtx's children. + removeChild(c.cancelCtx.Context, c) + } + c.mu.Lock() + if c.timer != nil { + c.timer.Stop() + c.timer = nil + } + c.mu.Unlock() +} + +// WithTimeout returns WithDeadline(parent, time.Now().Add(timeout)). +// +// Canceling this context releases resources associated with it, so code should +// call cancel as soon as the operations running in this Context complete: +// +// func slowOperationWithTimeout(ctx context.Context) (Result, error) { +// ctx, cancel := context.WithTimeout(ctx, 100*time.Millisecond) +// defer cancel() // releases resources if slowOperation completes before timeout elapses +// return slowOperation(ctx) +// } +func WithTimeout(parent Context, timeout time.Duration) (Context, CancelFunc) { + return WithDeadline(parent, time.Now().Add(timeout)) +} + +// WithValue returns a copy of parent in which the value associated with key is +// val. +// +// Use context Values only for request-scoped data that transits processes and +// APIs, not for passing optional parameters to functions. +func WithValue(parent Context, key interface{}, val interface{}) Context { + return &valueCtx{parent, key, val} +} + +// A valueCtx carries a key-value pair. It implements Value for that key and +// delegates all other calls to the embedded Context. +type valueCtx struct { + Context + key, val interface{} +} + +func (c *valueCtx) String() string { + return fmt.Sprintf("%v.WithValue(%#v, %#v)", c.Context, c.key, c.val) +} + +func (c *valueCtx) Value(key interface{}) interface{} { + if c.key == key { + return c.val + } + return c.Context.Value(key) +} diff --git a/vendor/golang.org/x/net/context/pre_go19.go b/vendor/golang.org/x/net/context/pre_go19.go new file mode 100644 index 0000000..b105f80 --- /dev/null +++ b/vendor/golang.org/x/net/context/pre_go19.go @@ -0,0 +1,109 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !go1.9 + +package context + +import "time" + +// A Context carries a deadline, a cancelation signal, and other values across +// API boundaries. +// +// Context's methods may be called by multiple goroutines simultaneously. +type Context interface { + // Deadline returns the time when work done on behalf of this context + // should be canceled. Deadline returns ok==false when no deadline is + // set. Successive calls to Deadline return the same results. + Deadline() (deadline time.Time, ok bool) + + // Done returns a channel that's closed when work done on behalf of this + // context should be canceled. Done may return nil if this context can + // never be canceled. Successive calls to Done return the same value. + // + // WithCancel arranges for Done to be closed when cancel is called; + // WithDeadline arranges for Done to be closed when the deadline + // expires; WithTimeout arranges for Done to be closed when the timeout + // elapses. + // + // Done is provided for use in select statements: + // + // // Stream generates values with DoSomething and sends them to out + // // until DoSomething returns an error or ctx.Done is closed. + // func Stream(ctx context.Context, out chan<- Value) error { + // for { + // v, err := DoSomething(ctx) + // if err != nil { + // return err + // } + // select { + // case <-ctx.Done(): + // return ctx.Err() + // case out <- v: + // } + // } + // } + // + // See http://blog.golang.org/pipelines for more examples of how to use + // a Done channel for cancelation. + Done() <-chan struct{} + + // Err returns a non-nil error value after Done is closed. Err returns + // Canceled if the context was canceled or DeadlineExceeded if the + // context's deadline passed. No other values for Err are defined. + // After Done is closed, successive calls to Err return the same value. + Err() error + + // Value returns the value associated with this context for key, or nil + // if no value is associated with key. Successive calls to Value with + // the same key returns the same result. + // + // Use context values only for request-scoped data that transits + // processes and API boundaries, not for passing optional parameters to + // functions. + // + // A key identifies a specific value in a Context. Functions that wish + // to store values in Context typically allocate a key in a global + // variable then use that key as the argument to context.WithValue and + // Context.Value. A key can be any type that supports equality; + // packages should define keys as an unexported type to avoid + // collisions. + // + // Packages that define a Context key should provide type-safe accessors + // for the values stores using that key: + // + // // Package user defines a User type that's stored in Contexts. + // package user + // + // import "golang.org/x/net/context" + // + // // User is the type of value stored in the Contexts. + // type User struct {...} + // + // // key is an unexported type for keys defined in this package. + // // This prevents collisions with keys defined in other packages. + // type key int + // + // // userKey is the key for user.User values in Contexts. It is + // // unexported; clients use user.NewContext and user.FromContext + // // instead of using this key directly. + // var userKey key = 0 + // + // // NewContext returns a new Context that carries value u. + // func NewContext(ctx context.Context, u *User) context.Context { + // return context.WithValue(ctx, userKey, u) + // } + // + // // FromContext returns the User value stored in ctx, if any. + // func FromContext(ctx context.Context) (*User, bool) { + // u, ok := ctx.Value(userKey).(*User) + // return u, ok + // } + Value(key interface{}) interface{} +} + +// A CancelFunc tells an operation to abandon its work. +// A CancelFunc does not wait for the work to stop. +// After the first call, subsequent calls to a CancelFunc do nothing. +type CancelFunc func() diff --git a/vendor/golang.org/x/net/internal/socks/client.go b/vendor/golang.org/x/net/internal/socks/client.go new file mode 100644 index 0000000..3d6f516 --- /dev/null +++ b/vendor/golang.org/x/net/internal/socks/client.go @@ -0,0 +1,168 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package socks + +import ( + "context" + "errors" + "io" + "net" + "strconv" + "time" +) + +var ( + noDeadline = time.Time{} + aLongTimeAgo = time.Unix(1, 0) +) + +func (d *Dialer) connect(ctx context.Context, c net.Conn, address string) (_ net.Addr, ctxErr error) { + host, port, err := splitHostPort(address) + if err != nil { + return nil, err + } + if deadline, ok := ctx.Deadline(); ok && !deadline.IsZero() { + c.SetDeadline(deadline) + defer c.SetDeadline(noDeadline) + } + if ctx != context.Background() { + errCh := make(chan error, 1) + done := make(chan struct{}) + defer func() { + close(done) + if ctxErr == nil { + ctxErr = <-errCh + } + }() + go func() { + select { + case <-ctx.Done(): + c.SetDeadline(aLongTimeAgo) + errCh <- ctx.Err() + case <-done: + errCh <- nil + } + }() + } + + b := make([]byte, 0, 6+len(host)) // the size here is just an estimate + b = append(b, Version5) + if len(d.AuthMethods) == 0 || d.Authenticate == nil { + b = append(b, 1, byte(AuthMethodNotRequired)) + } else { + ams := d.AuthMethods + if len(ams) > 255 { + return nil, errors.New("too many authentication methods") + } + b = append(b, byte(len(ams))) + for _, am := range ams { + b = append(b, byte(am)) + } + } + if _, ctxErr = c.Write(b); ctxErr != nil { + return + } + + if _, ctxErr = io.ReadFull(c, b[:2]); ctxErr != nil { + return + } + if b[0] != Version5 { + return nil, errors.New("unexpected protocol version " + strconv.Itoa(int(b[0]))) + } + am := AuthMethod(b[1]) + if am == AuthMethodNoAcceptableMethods { + return nil, errors.New("no acceptable authentication methods") + } + if d.Authenticate != nil { + if ctxErr = d.Authenticate(ctx, c, am); ctxErr != nil { + return + } + } + + b = b[:0] + b = append(b, Version5, byte(d.cmd), 0) + if ip := net.ParseIP(host); ip != nil { + if ip4 := ip.To4(); ip4 != nil { + b = append(b, AddrTypeIPv4) + b = append(b, ip4...) + } else if ip6 := ip.To16(); ip6 != nil { + b = append(b, AddrTypeIPv6) + b = append(b, ip6...) + } else { + return nil, errors.New("unknown address type") + } + } else { + if len(host) > 255 { + return nil, errors.New("FQDN too long") + } + b = append(b, AddrTypeFQDN) + b = append(b, byte(len(host))) + b = append(b, host...) + } + b = append(b, byte(port>>8), byte(port)) + if _, ctxErr = c.Write(b); ctxErr != nil { + return + } + + if _, ctxErr = io.ReadFull(c, b[:4]); ctxErr != nil { + return + } + if b[0] != Version5 { + return nil, errors.New("unexpected protocol version " + strconv.Itoa(int(b[0]))) + } + if cmdErr := Reply(b[1]); cmdErr != StatusSucceeded { + return nil, errors.New("unknown error " + cmdErr.String()) + } + if b[2] != 0 { + return nil, errors.New("non-zero reserved field") + } + l := 2 + var a Addr + switch b[3] { + case AddrTypeIPv4: + l += net.IPv4len + a.IP = make(net.IP, net.IPv4len) + case AddrTypeIPv6: + l += net.IPv6len + a.IP = make(net.IP, net.IPv6len) + case AddrTypeFQDN: + if _, err := io.ReadFull(c, b[:1]); err != nil { + return nil, err + } + l += int(b[0]) + default: + return nil, errors.New("unknown address type " + strconv.Itoa(int(b[3]))) + } + if cap(b) < l { + b = make([]byte, l) + } else { + b = b[:l] + } + if _, ctxErr = io.ReadFull(c, b); ctxErr != nil { + return + } + if a.IP != nil { + copy(a.IP, b) + } else { + a.Name = string(b[:len(b)-2]) + } + a.Port = int(b[len(b)-2])<<8 | int(b[len(b)-1]) + return &a, nil +} + +func splitHostPort(address string) (string, int, error) { + host, port, err := net.SplitHostPort(address) + if err != nil { + return "", 0, err + } + portnum, err := strconv.Atoi(port) + if err != nil { + return "", 0, err + } + if 1 > portnum || portnum > 0xffff { + return "", 0, errors.New("port number out of range " + port) + } + return host, portnum, nil +} diff --git a/vendor/golang.org/x/net/internal/socks/socks.go b/vendor/golang.org/x/net/internal/socks/socks.go new file mode 100644 index 0000000..6929a9f --- /dev/null +++ b/vendor/golang.org/x/net/internal/socks/socks.go @@ -0,0 +1,317 @@ +// Copyright 2018 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package socks provides a SOCKS version 5 client implementation. +// +// SOCKS protocol version 5 is defined in RFC 1928. +// Username/Password authentication for SOCKS version 5 is defined in +// RFC 1929. +package socks + +import ( + "context" + "errors" + "io" + "net" + "strconv" +) + +// A Command represents a SOCKS command. +type Command int + +func (cmd Command) String() string { + switch cmd { + case CmdConnect: + return "socks connect" + case cmdBind: + return "socks bind" + default: + return "socks " + strconv.Itoa(int(cmd)) + } +} + +// An AuthMethod represents a SOCKS authentication method. +type AuthMethod int + +// A Reply represents a SOCKS command reply code. +type Reply int + +func (code Reply) String() string { + switch code { + case StatusSucceeded: + return "succeeded" + case 0x01: + return "general SOCKS server failure" + case 0x02: + return "connection not allowed by ruleset" + case 0x03: + return "network unreachable" + case 0x04: + return "host unreachable" + case 0x05: + return "connection refused" + case 0x06: + return "TTL expired" + case 0x07: + return "command not supported" + case 0x08: + return "address type not supported" + default: + return "unknown code: " + strconv.Itoa(int(code)) + } +} + +// Wire protocol constants. +const ( + Version5 = 0x05 + + AddrTypeIPv4 = 0x01 + AddrTypeFQDN = 0x03 + AddrTypeIPv6 = 0x04 + + CmdConnect Command = 0x01 // establishes an active-open forward proxy connection + cmdBind Command = 0x02 // establishes a passive-open forward proxy connection + + AuthMethodNotRequired AuthMethod = 0x00 // no authentication required + AuthMethodUsernamePassword AuthMethod = 0x02 // use username/password + AuthMethodNoAcceptableMethods AuthMethod = 0xff // no acceptable authentication methods + + StatusSucceeded Reply = 0x00 +) + +// An Addr represents a SOCKS-specific address. +// Either Name or IP is used exclusively. +type Addr struct { + Name string // fully-qualified domain name + IP net.IP + Port int +} + +func (a *Addr) Network() string { return "socks" } + +func (a *Addr) String() string { + if a == nil { + return "" + } + port := strconv.Itoa(a.Port) + if a.IP == nil { + return net.JoinHostPort(a.Name, port) + } + return net.JoinHostPort(a.IP.String(), port) +} + +// A Conn represents a forward proxy connection. +type Conn struct { + net.Conn + + boundAddr net.Addr +} + +// BoundAddr returns the address assigned by the proxy server for +// connecting to the command target address from the proxy server. +func (c *Conn) BoundAddr() net.Addr { + if c == nil { + return nil + } + return c.boundAddr +} + +// A Dialer holds SOCKS-specific options. +type Dialer struct { + cmd Command // either CmdConnect or cmdBind + proxyNetwork string // network between a proxy server and a client + proxyAddress string // proxy server address + + // ProxyDial specifies the optional dial function for + // establishing the transport connection. + ProxyDial func(context.Context, string, string) (net.Conn, error) + + // AuthMethods specifies the list of request authention + // methods. + // If empty, SOCKS client requests only AuthMethodNotRequired. + AuthMethods []AuthMethod + + // Authenticate specifies the optional authentication + // function. It must be non-nil when AuthMethods is not empty. + // It must return an error when the authentication is failed. + Authenticate func(context.Context, io.ReadWriter, AuthMethod) error +} + +// DialContext connects to the provided address on the provided +// network. +// +// The returned error value may be a net.OpError. When the Op field of +// net.OpError contains "socks", the Source field contains a proxy +// server address and the Addr field contains a command target +// address. +// +// See func Dial of the net package of standard library for a +// description of the network and address parameters. +func (d *Dialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if ctx == nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: errors.New("nil context")} + } + var err error + var c net.Conn + if d.ProxyDial != nil { + c, err = d.ProxyDial(ctx, d.proxyNetwork, d.proxyAddress) + } else { + var dd net.Dialer + c, err = dd.DialContext(ctx, d.proxyNetwork, d.proxyAddress) + } + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + a, err := d.connect(ctx, c, address) + if err != nil { + c.Close() + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + return &Conn{Conn: c, boundAddr: a}, nil +} + +// DialWithConn initiates a connection from SOCKS server to the target +// network and address using the connection c that is already +// connected to the SOCKS server. +// +// It returns the connection's local address assigned by the SOCKS +// server. +func (d *Dialer) DialWithConn(ctx context.Context, c net.Conn, network, address string) (net.Addr, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if ctx == nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: errors.New("nil context")} + } + a, err := d.connect(ctx, c, address) + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + return a, nil +} + +// Dial connects to the provided address on the provided network. +// +// Unlike DialContext, it returns a raw transport connection instead +// of a forward proxy connection. +// +// Deprecated: Use DialContext or DialWithConn instead. +func (d *Dialer) Dial(network, address string) (net.Conn, error) { + if err := d.validateTarget(network, address); err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + var err error + var c net.Conn + if d.ProxyDial != nil { + c, err = d.ProxyDial(context.Background(), d.proxyNetwork, d.proxyAddress) + } else { + c, err = net.Dial(d.proxyNetwork, d.proxyAddress) + } + if err != nil { + proxy, dst, _ := d.pathAddrs(address) + return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err} + } + if _, err := d.DialWithConn(context.Background(), c, network, address); err != nil { + c.Close() + return nil, err + } + return c, nil +} + +func (d *Dialer) validateTarget(network, address string) error { + switch network { + case "tcp", "tcp6", "tcp4": + default: + return errors.New("network not implemented") + } + switch d.cmd { + case CmdConnect, cmdBind: + default: + return errors.New("command not implemented") + } + return nil +} + +func (d *Dialer) pathAddrs(address string) (proxy, dst net.Addr, err error) { + for i, s := range []string{d.proxyAddress, address} { + host, port, err := splitHostPort(s) + if err != nil { + return nil, nil, err + } + a := &Addr{Port: port} + a.IP = net.ParseIP(host) + if a.IP == nil { + a.Name = host + } + if i == 0 { + proxy = a + } else { + dst = a + } + } + return +} + +// NewDialer returns a new Dialer that dials through the provided +// proxy server's network and address. +func NewDialer(network, address string) *Dialer { + return &Dialer{proxyNetwork: network, proxyAddress: address, cmd: CmdConnect} +} + +const ( + authUsernamePasswordVersion = 0x01 + authStatusSucceeded = 0x00 +) + +// UsernamePassword are the credentials for the username/password +// authentication method. +type UsernamePassword struct { + Username string + Password string +} + +// Authenticate authenticates a pair of username and password with the +// proxy server. +func (up *UsernamePassword) Authenticate(ctx context.Context, rw io.ReadWriter, auth AuthMethod) error { + switch auth { + case AuthMethodNotRequired: + return nil + case AuthMethodUsernamePassword: + if len(up.Username) == 0 || len(up.Username) > 255 || len(up.Password) == 0 || len(up.Password) > 255 { + return errors.New("invalid username/password") + } + b := []byte{authUsernamePasswordVersion} + b = append(b, byte(len(up.Username))) + b = append(b, up.Username...) + b = append(b, byte(len(up.Password))) + b = append(b, up.Password...) + // TODO(mikio): handle IO deadlines and cancelation if + // necessary + if _, err := rw.Write(b); err != nil { + return err + } + if _, err := io.ReadFull(rw, b[:2]); err != nil { + return err + } + if b[0] != authUsernamePasswordVersion { + return errors.New("invalid username/password version") + } + if b[1] != authStatusSucceeded { + return errors.New("username/password authentication failed") + } + return nil + } + return errors.New("unsupported authentication method " + strconv.Itoa(int(auth))) +} diff --git a/vendor/golang.org/x/net/proxy/direct.go b/vendor/golang.org/x/net/proxy/direct.go new file mode 100644 index 0000000..4c5ad88 --- /dev/null +++ b/vendor/golang.org/x/net/proxy/direct.go @@ -0,0 +1,18 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package proxy + +import ( + "net" +) + +type direct struct{} + +// Direct is a direct proxy: one that makes network connections directly. +var Direct = direct{} + +func (direct) Dial(network, addr string) (net.Conn, error) { + return net.Dial(network, addr) +} diff --git a/vendor/golang.org/x/net/proxy/per_host.go b/vendor/golang.org/x/net/proxy/per_host.go new file mode 100644 index 0000000..0689bb6 --- /dev/null +++ b/vendor/golang.org/x/net/proxy/per_host.go @@ -0,0 +1,140 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package proxy + +import ( + "net" + "strings" +) + +// A PerHost directs connections to a default Dialer unless the host name +// requested matches one of a number of exceptions. +type PerHost struct { + def, bypass Dialer + + bypassNetworks []*net.IPNet + bypassIPs []net.IP + bypassZones []string + bypassHosts []string +} + +// NewPerHost returns a PerHost Dialer that directs connections to either +// defaultDialer or bypass, depending on whether the connection matches one of +// the configured rules. +func NewPerHost(defaultDialer, bypass Dialer) *PerHost { + return &PerHost{ + def: defaultDialer, + bypass: bypass, + } +} + +// Dial connects to the address addr on the given network through either +// defaultDialer or bypass. +func (p *PerHost) Dial(network, addr string) (c net.Conn, err error) { + host, _, err := net.SplitHostPort(addr) + if err != nil { + return nil, err + } + + return p.dialerForRequest(host).Dial(network, addr) +} + +func (p *PerHost) dialerForRequest(host string) Dialer { + if ip := net.ParseIP(host); ip != nil { + for _, net := range p.bypassNetworks { + if net.Contains(ip) { + return p.bypass + } + } + for _, bypassIP := range p.bypassIPs { + if bypassIP.Equal(ip) { + return p.bypass + } + } + return p.def + } + + for _, zone := range p.bypassZones { + if strings.HasSuffix(host, zone) { + return p.bypass + } + if host == zone[1:] { + // For a zone ".example.com", we match "example.com" + // too. + return p.bypass + } + } + for _, bypassHost := range p.bypassHosts { + if bypassHost == host { + return p.bypass + } + } + return p.def +} + +// AddFromString parses a string that contains comma-separated values +// specifying hosts that should use the bypass proxy. Each value is either an +// IP address, a CIDR range, a zone (*.example.com) or a host name +// (localhost). A best effort is made to parse the string and errors are +// ignored. +func (p *PerHost) AddFromString(s string) { + hosts := strings.Split(s, ",") + for _, host := range hosts { + host = strings.TrimSpace(host) + if len(host) == 0 { + continue + } + if strings.Contains(host, "/") { + // We assume that it's a CIDR address like 127.0.0.0/8 + if _, net, err := net.ParseCIDR(host); err == nil { + p.AddNetwork(net) + } + continue + } + if ip := net.ParseIP(host); ip != nil { + p.AddIP(ip) + continue + } + if strings.HasPrefix(host, "*.") { + p.AddZone(host[1:]) + continue + } + p.AddHost(host) + } +} + +// AddIP specifies an IP address that will use the bypass proxy. Note that +// this will only take effect if a literal IP address is dialed. A connection +// to a named host will never match an IP. +func (p *PerHost) AddIP(ip net.IP) { + p.bypassIPs = append(p.bypassIPs, ip) +} + +// AddNetwork specifies an IP range that will use the bypass proxy. Note that +// this will only take effect if a literal IP address is dialed. A connection +// to a named host will never match. +func (p *PerHost) AddNetwork(net *net.IPNet) { + p.bypassNetworks = append(p.bypassNetworks, net) +} + +// AddZone specifies a DNS suffix that will use the bypass proxy. A zone of +// "example.com" matches "example.com" and all of its subdomains. +func (p *PerHost) AddZone(zone string) { + if strings.HasSuffix(zone, ".") { + zone = zone[:len(zone)-1] + } + if !strings.HasPrefix(zone, ".") { + zone = "." + zone + } + p.bypassZones = append(p.bypassZones, zone) +} + +// AddHost specifies a host name that will use the bypass proxy. +func (p *PerHost) AddHost(host string) { + if strings.HasSuffix(host, ".") { + host = host[:len(host)-1] + } + p.bypassHosts = append(p.bypassHosts, host) +} diff --git a/vendor/golang.org/x/net/proxy/proxy.go b/vendor/golang.org/x/net/proxy/proxy.go new file mode 100644 index 0000000..f6026b9 --- /dev/null +++ b/vendor/golang.org/x/net/proxy/proxy.go @@ -0,0 +1,139 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package proxy provides support for a variety of protocols to proxy network +// data. +package proxy // import "golang.org/x/net/proxy" + +import ( + "errors" + "net" + "net/url" + "os" + "sync" +) + +// A Dialer is a means to establish a connection. +type Dialer interface { + // Dial connects to the given address via the proxy. + Dial(network, addr string) (c net.Conn, err error) +} + +// Auth contains authentication parameters that specific Dialers may require. +type Auth struct { + User, Password string +} + +// FromEnvironment returns the dialer specified by the proxy related variables in +// the environment. +func FromEnvironment() Dialer { + allProxy := allProxyEnv.Get() + if len(allProxy) == 0 { + return Direct + } + + proxyURL, err := url.Parse(allProxy) + if err != nil { + return Direct + } + proxy, err := FromURL(proxyURL, Direct) + if err != nil { + return Direct + } + + noProxy := noProxyEnv.Get() + if len(noProxy) == 0 { + return proxy + } + + perHost := NewPerHost(proxy, Direct) + perHost.AddFromString(noProxy) + return perHost +} + +// proxySchemes is a map from URL schemes to a function that creates a Dialer +// from a URL with such a scheme. +var proxySchemes map[string]func(*url.URL, Dialer) (Dialer, error) + +// RegisterDialerType takes a URL scheme and a function to generate Dialers from +// a URL with that scheme and a forwarding Dialer. Registered schemes are used +// by FromURL. +func RegisterDialerType(scheme string, f func(*url.URL, Dialer) (Dialer, error)) { + if proxySchemes == nil { + proxySchemes = make(map[string]func(*url.URL, Dialer) (Dialer, error)) + } + proxySchemes[scheme] = f +} + +// FromURL returns a Dialer given a URL specification and an underlying +// Dialer for it to make network requests. +func FromURL(u *url.URL, forward Dialer) (Dialer, error) { + var auth *Auth + if u.User != nil { + auth = new(Auth) + auth.User = u.User.Username() + if p, ok := u.User.Password(); ok { + auth.Password = p + } + } + + switch u.Scheme { + case "socks5", "socks5h": + addr := u.Hostname() + port := u.Port() + if port == "" { + port = "1080" + } + return SOCKS5("tcp", net.JoinHostPort(addr, port), auth, forward) + } + + // If the scheme doesn't match any of the built-in schemes, see if it + // was registered by another package. + if proxySchemes != nil { + if f, ok := proxySchemes[u.Scheme]; ok { + return f(u, forward) + } + } + + return nil, errors.New("proxy: unknown scheme: " + u.Scheme) +} + +var ( + allProxyEnv = &envOnce{ + names: []string{"ALL_PROXY", "all_proxy"}, + } + noProxyEnv = &envOnce{ + names: []string{"NO_PROXY", "no_proxy"}, + } +) + +// envOnce looks up an environment variable (optionally by multiple +// names) once. It mitigates expensive lookups on some platforms +// (e.g. Windows). +// (Borrowed from net/http/transport.go) +type envOnce struct { + names []string + once sync.Once + val string +} + +func (e *envOnce) Get() string { + e.once.Do(e.init) + return e.val +} + +func (e *envOnce) init() { + for _, n := range e.names { + e.val = os.Getenv(n) + if e.val != "" { + return + } + } +} + +// reset is used by tests +func (e *envOnce) reset() { + e.once = sync.Once{} + e.val = "" +} diff --git a/vendor/golang.org/x/net/proxy/socks5.go b/vendor/golang.org/x/net/proxy/socks5.go new file mode 100644 index 0000000..56345ec --- /dev/null +++ b/vendor/golang.org/x/net/proxy/socks5.go @@ -0,0 +1,36 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package proxy + +import ( + "context" + "net" + + "golang.org/x/net/internal/socks" +) + +// SOCKS5 returns a Dialer that makes SOCKSv5 connections to the given +// address with an optional username and password. +// See RFC 1928 and RFC 1929. +func SOCKS5(network, address string, auth *Auth, forward Dialer) (Dialer, error) { + d := socks.NewDialer(network, address) + if forward != nil { + d.ProxyDial = func(_ context.Context, network string, address string) (net.Conn, error) { + return forward.Dial(network, address) + } + } + if auth != nil { + up := socks.UsernamePassword{ + Username: auth.User, + Password: auth.Password, + } + d.AuthMethods = []socks.AuthMethod{ + socks.AuthMethodNotRequired, + socks.AuthMethodUsernamePassword, + } + d.Authenticate = up.Authenticate + } + return d, nil +} diff --git a/vendor/local/.gitignore b/vendor/local/.gitignore new file mode 100644 index 0000000..19fc60a --- /dev/null +++ b/vendor/local/.gitignore @@ -0,0 +1,12 @@ +*.key +*.crt +*.pem +*.swp +*.swo +*.pub +cli-keys +fake-ssh +gcpkeys +*.json +*mnt +ssh-portable diff --git a/vendor/local/encoder/bop.go b/vendor/local/encoder/bop.go new file mode 100644 index 0000000..12cf536 --- /dev/null +++ b/vendor/local/encoder/bop.go @@ -0,0 +1,625 @@ +package encoder + +import ( + "bytes" + "compress/gzip" + "crypto/aes" + "crypto/cipher" + "crypto/rand" + "io" + "io/ioutil" + "local/encoder/pipe" + "local/encryptor" + "local/logger" + "strconv" + + "github.com/golang/snappy" + "github.com/klauspost/reedsolomon" + "github.com/pierrec/lz4" +) + +var PipeBuffSize = aes.BlockSize + 2 + +type BOP3 interface { + Wrap3(chan []byte) chan []byte + Unwrap3(chan []byte) chan []byte + BOP +} + +type BOP2 interface { + Wrap2(io.Reader) io.Reader + Unwrap2(io.Reader) io.Reader + BOP +} + +type BOP interface { + Wrap([]byte) []byte + Unwrap([]byte) []byte +} + +type Zipper struct{} +type snapper struct{} +type symCryptor struct{ encryptor.Encryptor } +type asymCryptor struct{ encryptor.Encryptor } +type Salter struct{ n int } +type LZ4 struct{} +type AES struct { + Key []byte + keylen int + block cipher.Block +} +type PAR2 struct { + chunks int + pars int + enc reedsolomon.Encoder +} + +func (p *PAR2) fix() error { + if p.chunks == 0 { + p.chunks = 50 + } + if p.pars == 0 { + p.pars = 5 + } + if p.enc == nil { + e, err := reedsolomon.New(p.chunks, p.pars) + p.enc = e + return err + } + return nil +} +func (p *PAR2) Wrap(b []byte) []byte { + if p.fix() != nil { + return b + } + split, err := p.enc.Split(b) + if err != nil { + return b + } + if err := p.enc.Encode(split); err != nil { + return b + } + if ok, err := p.enc.Verify(split); err != nil || !ok { + return b + } + l := strconv.Itoa(len(b)) + l = string(byte(len(l))) + l + b = []byte(l) + for i := range split { + b = append(b, split[i]...) + } + return b +} +func (p *PAR2) Unwrap(b []byte) []byte { + if p.fix() != nil { + return b + } + l := int(b[0]) + o := b[1 : l+1] + c := b[l+1:] + m, err := strconv.Atoi(string(o)) + if err != nil { + return b + } + split := make([][]byte, p.chunks+p.pars) + chunklen := len(c) / (p.chunks + p.pars) + for i := range split { + split[i] = c[i*chunklen : (i+1)*chunklen] + } + if err := p.enc.Reconstruct(split); err != nil { + return b + } + d := []byte{} + for i := 0; i < p.chunks; i++ { + d = append(d, split[i]...) + } + return d[:m] +} + +func (z *Zipper) Wrap3(b chan []byte) chan []byte { + out := make(chan []byte) + go func() { + defer close(out) + pipeR, pipeW := io.Pipe() + go func() { + zw := gzip.NewWriter(pipeW) + defer pipeW.Close() + defer zw.Close() + for input := range b { + if _, err := zw.Write(input); err != nil { + panic(err) + } + } + }() + for { + subbuff := make([]byte, PipeBuffSize) + n, err := pipeR.Read(subbuff) + if err != nil && err != io.EOF { + panic(err) + } else if n > 0 { + out <- copyBSlice(subbuff[:n]) + } + if err == io.EOF { + break + } + } + }() + return out +} +func (z *Zipper) Unwrap3(b chan []byte) chan []byte { + out := make(chan []byte) + go func() { + pipeR, pipeW := io.Pipe() + defer close(out) + go func() { + defer pipeW.Close() + for input := range b { + if _, err := pipeW.Write(input); err != nil { + panic(err) + } + } + }() + zr, err := gzip.NewReader(pipeR) + if err != nil { + panic(err) + } + buff := make([]byte, PipeBuffSize) + for { + n, err := zr.Read(buff) + if err != nil && err != io.EOF { + panic(err) + } + if n > 0 { + out <- copyBSlice(buff[:n]) + } + if err == io.EOF { + break + } + } + }() + return out +} + +func (z *Zipper) Wrap2(b io.Reader) io.Reader { + pipe := pipe.New() + pipe.SetCap(PipeBuffSize) + zw := gzip.NewWriter(pipe) + go func() { + defer pipe.Close() + defer zw.Close() + buff := make([]byte, PipeBuffSize) + if _, err := io.CopyBuffer(zw, b, buff); err != nil { + panic(err) + } + }() + return pipe +} +func (z *Zipper) Unwrap2(b io.Reader) io.Reader { + pipe := pipe.New() + pipe.SetCap(PipeBuffSize) + go func() { + defer pipe.Close() + zr, err := gzip.NewReader(b) + if err != nil && err != io.EOF { + panic(err) + } else if err == nil { + if _, err := io.Copy(pipe, zr); err != nil { + panic(err) + } + defer zr.Close() + } + }() + return pipe +} + +func (z *Zipper) Wrap(b []byte) []byte { + var buf bytes.Buffer + zw := gzip.NewWriter(&buf) + if _, err := zw.Write(b); err != nil { + return b + } + zw.Close() + return buf.Bytes() +} + +func (z *Zipper) Unwrap(b []byte) []byte { + buf := bytes.NewBuffer(b) + zw, err := gzip.NewReader(buf) + if err != nil { + return b + } + decompressed, err := ioutil.ReadAll(zw) + if err != nil { + return b + } + return decompressed +} + +func (s *Salter) Unwrap3(b chan []byte) chan []byte { + out := make(chan []byte) + go func() { + defer close(out) + first := <-b + saltLen := int(first[0]) + for len(first) < saltLen+1 { + first = append(first, <-b...) + } + first = first[saltLen+1:] + out <- copyBSlice(first) + for input := range b { + out <- copyBSlice(input) + } + }() + return out +} + +func (s *Salter) Wrap3(b chan []byte) chan []byte { + out := make(chan []byte) + salt := s.makeSalt() + go func() { + defer close(out) + out <- copyBSlice(salt) + for input := range b { + out <- copyBSlice(input) + } + }() + return out +} + +func (s *Salter) makeSalt() []byte { + n := 21 + if s.n > 0 { + n = s.n + } + salt := make([]byte, n) + _, err := rand.Read(salt) + if err != nil { + return nil + } + return append([]byte{byte(len(salt))}, salt...) +} + +func (s *Salter) Wrap2(b io.Reader) io.Reader { + salt := s.makeSalt() + + pipe := pipe.New() + pipe.SetCap(PipeBuffSize) + go func() { + defer pipe.Close() + if _, err := pipe.Write(salt); err != nil { + panic(err) + } + tmpbuff := make([]byte, PipeBuffSize) + if _, err := io.CopyBuffer(pipe, b, tmpbuff); err != nil { + panic(err) + } + }() + return pipe +} + +func (s *Salter) Unwrap2(b io.Reader) io.Reader { + buff := make([]byte, 1) + if _, err := b.Read(buff); err != nil && err != io.EOF { + panic(err) + } + l := int(buff[0]) + buff = make([]byte, l) + if _, err := b.Read(buff); err != nil && err != io.EOF { + panic(err) + } + pipe := pipe.New() + pipe.SetCap(PipeBuffSize) + go func() { + defer pipe.Close() + if _, err := io.Copy(pipe, b); err != nil && err != io.EOF { + panic(err) + } + }() + return pipe +} + +func (s *Salter) Wrap(b []byte) []byte { + salt := s.makeSalt() + + return append(salt, b...) +} + +func (s *Salter) Unwrap(b []byte) []byte { + if len(b) < 1 { + return b + } + l := int(b[0]) + if l > len(b)+1 { + return b + } + return b[1+l:] +} + +func (sc *symCryptor) Wrap(b []byte) []byte { + return []byte(sc.Encrypt(string(b))) +} + +func (sc *symCryptor) Unwrap(b []byte) []byte { + return []byte(sc.Decrypt(string(b))) +} + +func (sc *asymCryptor) Wrap(b []byte) []byte { + return []byte(sc.Encrypt(string(b))) +} + +func (sc *asymCryptor) Unwrap(b []byte) []byte { + return []byte(sc.Decrypt(string(b))) +} + +func (s *snapper) Wrap(b []byte) []byte { + return snappy.Encode(nil, b) +} + +func (s *snapper) Unwrap(b []byte) []byte { + d, err := snappy.Decode(nil, b) + if err != nil { + return b + } + return d +} + +func (s *AES) Wrap3(b chan []byte) chan []byte { + s.fix() + out := make(chan []byte) + + go func() { + defer close(out) + + // IV + iv := make([]byte, aes.BlockSize) + if n, err := io.ReadFull(rand.Reader, iv); err != nil || n != len(iv) { + panic(err) + } + out <- copyBSlice(iv) + + // cipher + ttl := int64(0) + stream := cipher.NewCFBEncrypter(s.block, iv) + for input := range b { + ttl += int64(len(input)) + stream.XORKeyStream(input, input) + if len(input) > 0 { + out <- copyBSlice(input) + } + } + + // padding + out <- copyBSlice(s.getPadding(ttl)) + }() + + return out +} + +func (s *AES) Wrap2(b io.Reader) io.Reader { + s.fix() + pipe := pipe.New() + pipe.SetCap(PipeBuffSize) + + go func() { + defer pipe.Close() + + // IV + iv := make([]byte, aes.BlockSize) + if n, err := io.ReadFull(rand.Reader, iv); err != nil || n != len(iv) { + panic(err) + } + pipe.Write(iv) + + // cipher + ttl := int64(0) + stream := cipher.NewCFBEncrypter(s.block, iv) + buff := make([]byte, PipeBuffSize) + for n, err := b.Read(buff); err == nil || err == io.EOF; n, err = b.Read(buff) { + ttl += int64(n) + stream.XORKeyStream(buff[:n], buff[:n]) + if m, err := pipe.Write(buff[:n]); err != nil || m != n { + panic(err) + } + if err == io.EOF { + break + } + } + + // padding + pipe.Write(s.getPadding(ttl)) + }() + + return pipe +} + +func (s *AES) Unwrap2(b io.Reader) io.Reader { + s.fix() + pipe := pipe.New() + pipe.SetCap(PipeBuffSize) + + go func() { + defer pipe.Close() + + // IV + var iv []byte + add := make([]byte, PipeBuffSize) + for len(iv) < aes.BlockSize { + n, err := b.Read(add) + if err != nil && err != io.EOF { + panic(err) + } + iv = append(iv, add[:n]...) + } + last := iv[aes.BlockSize:] + iv = iv[:aes.BlockSize] + + // cipher + var n int + var err error + stream := cipher.NewCFBDecrypter(s.block, iv) + for n, err = b.Read(add); err == nil || err == io.EOF; n, err = b.Read(add) { + last = append(last, add[:n]...) + stream.XORKeyStream(last[:len(last)-s.needModZero()], last[:len(last)-s.needModZero()]) + pipe.Write(last[:len(last)-s.needModZero()]) + last = last[len(last)-s.needModZero():] + if err == io.EOF { + break + } + } + if err != nil && err != io.EOF { + panic(err) + } + // padding + trim := int(last[len(last)-1]) + last = last[:len(last)-trim] + stream.XORKeyStream(last, last) + pipe.Write(last) + }() + + return pipe +} + +func (s *AES) Unwrap3(b chan []byte) chan []byte { + s.fix() + out := make(chan []byte) + + go func() { + defer close(out) + + // IV + var lastTwo [2][]byte + var iv []byte + for len(iv) < aes.BlockSize { + add := <-b + if len(add) >= aes.BlockSize-len(iv) { + isIV := aes.BlockSize - len(iv) + lastTwo[0] = add[isIV:] + add = add[:isIV] + } + iv = append(iv, add...) + } + + // cipher + stream := cipher.NewCFBDecrypter(s.block, iv) + for input := range b { + stream.XORKeyStream(lastTwo[1], lastTwo[1]) + if len(lastTwo[1]) > 0 { + out <- copyBSlice(lastTwo[1]) + } + lastTwo[1] = lastTwo[0] + lastTwo[0] = input + } + last := append(lastTwo[1], lastTwo[0]...) + // padding + trim := int(last[len(last)-1]) + last = last[:len(last)-trim] + stream.XORKeyStream(last, last) + if len(last) > 0 { + out <- copyBSlice(last) + } + }() + + return out +} + +func (s *AES) Wrap(b []byte) []byte { + s.fix() + + c := s.pad(b) + + d := make([]byte, aes.BlockSize+len(c)) + iv := d[:aes.BlockSize] + if _, err := io.ReadFull(rand.Reader, iv); err != nil { + return nil + } + + stream := cipher.NewCFBEncrypter(s.block, iv) + stream.XORKeyStream(d[aes.BlockSize:], c) + + return d +} + +func (s *AES) Unwrap(b []byte) []byte { + s.fix() + + iv := b[:aes.BlockSize] + b = b[aes.BlockSize:] + + stream := cipher.NewCFBDecrypter(s.block, iv) + stream.XORKeyStream(b, b) + + return s.unpad(b) +} +func (s *AES) fix() { + if s.keylen < 1 { + s.keylen = 32 + } + if len(s.Key) != s.keylen { + s.Key = bytes.Repeat(append(s.Key, 0), s.keylen)[:s.keylen] + } + if s.block == nil { + s.block, _ = aes.NewCipher(s.Key) + } +} + +func (s *AES) unpad(b []byte) []byte { + s.fix() + if len(b) < 1 || len(b) < int(b[len(b)-1]) { + return b + } + return b[:len(b)-int(b[len(b)-1])] +} + +func (s *AES) pad(b []byte) []byte { + s.fix() + return append(b, s.getPadding(int64(len(b)))...) +} + +func (s *AES) getPadding(l int64) []byte { + padding := int(int64(s.needModZero()) - l%int64(s.needModZero())) + return bytes.Repeat([]byte{byte(padding)}, padding) +} + +func (s *AES) needModZero() int { + return aes.BlockSize +} + +func (l *LZ4) Wrap(b []byte) []byte { + var buf bytes.Buffer + w := lz4.NewWriter(&buf) + if _, err := io.Copy(w, bytes.NewBuffer(b)); err != nil { + panic(err) + } + if err := w.Close(); err != nil { + panic(err) + } + return buf.Bytes() +} + +func (l *LZ4) Unwrap(b []byte) []byte { + zr := lz4.NewReader(bytes.NewBuffer(b)) + b, err := ioutil.ReadAll(zr) + if err != nil { + panic(err) + } + return b +} + +func copyBSlice(b []byte) []byte { + return append([]byte{}, b...) +} + +func screenReader(b io.Reader) io.Reader { + return b + c, err := ioutil.ReadAll(b) + if err != nil { + panic(err) + } + logger.Logf("screened %v", len(c)) + if len(c) > 20 { + logger.Logf("%s...%s", c[:5], c[len(c)-5:]) + } else if len(c) > 0 { + logger.Logf("%s", c) + } + return bytes.NewReader(c) +} diff --git a/vendor/local/encoder/bop2_test.go b/vendor/local/encoder/bop2_test.go new file mode 100644 index 0000000..2a3ba09 --- /dev/null +++ b/vendor/local/encoder/bop2_test.go @@ -0,0 +1,61 @@ +package encoder + +import ( + "io/ioutil" + "strings" + "testing" +) + +func Test_BOP2(t *testing.T) { + cases := []struct { + bop BOP2 + streamLength int + bufferCapacity int + }{ + { + bop: &Salter{}, + streamLength: 50000, + bufferCapacity: 100, + }, + { + bop: &Salter{}, + streamLength: 50, + bufferCapacity: 40, + }, + { + bop: &AES{Key: []byte("key")}, + streamLength: 50000, + bufferCapacity: 100, + }, + { + bop: &AES{Key: []byte("key")}, + streamLength: 50, + bufferCapacity: 40, + }, + { + bop: &Zipper{}, + streamLength: 50000, + bufferCapacity: 100, + }, + { + bop: &Zipper{}, + streamLength: 50, + bufferCapacity: 40, + }, + } + + for _, c := range cases { + PipeBuffSize = c.bufferCapacity + inputString := strings.Repeat("hello world! ", c.streamLength)[:c.streamLength] + input := strings.NewReader(inputString) + wrappedReader := c.bop.Wrap2(input) + unwrappedReader := c.bop.Unwrap2(wrappedReader) + out, err := ioutil.ReadAll(unwrappedReader) + if err != nil { + t.Fatalf("failed to read from unwrapped: %v", err) + } else if string(out) != inputString { + t.Errorf("wrong output: wanted (%v), got (%v)", len(inputString), len(out)) + } + t.Logf("%T : %v => ? => %v", c.bop, len(inputString), len(out)) + } +} diff --git a/vendor/local/encoder/bop3_test.go b/vendor/local/encoder/bop3_test.go new file mode 100644 index 0000000..db5f45c --- /dev/null +++ b/vendor/local/encoder/bop3_test.go @@ -0,0 +1,75 @@ +package encoder + +import ( + "strings" + "testing" +) + +func Test_BOP3(t *testing.T) { + was := PipeBuffSize + defer func() { + PipeBuffSize = was + }() + cases := []struct { + bop BOP3 + sz int + }{ + { + sz: 500, + bop: &AES{Key: []byte("hi")}, + }, + { + sz: 10, + bop: &AES{Key: []byte("hi")}, + }, + { + sz: 500, + bop: &Zipper{}, + }, + { + sz: 10, + bop: &Zipper{}, + }, + { + sz: 500, + bop: &Salter{}, + }, + { + sz: 10, + bop: &Salter{}, + }, + } + + for _, c := range cases { + PipeBuffSize = c.sz + input := strings.Repeat("input", 5) + inch := make(chan []byte) + wrapch := c.bop.Wrap3(inch) + go func() { + for _, ch := range input { + inch <- []byte{byte(ch)} + } + close(inch) + }() + wrapped := "" + for o := range wrapch { + wrapped += string(o) + } + if len(wrapped) < 1 { + t.Errorf("%T : %s => 0 length", c, input) + continue + } + inunwrapch := make(chan []byte) + unwrapch := c.bop.Unwrap3(inunwrapch) + inunwrapch <- []byte(wrapped) + close(inunwrapch) + out := "" + for o := range unwrapch { + out += string(o) + } + if input != out { + t.Errorf("wrap3 failed for %T", c) + } + t.Logf("%T : %v : %s => (%v) => %s", c.bop, c.sz, input, len(wrapped), out) + } +} diff --git a/vendor/local/encoder/bop_test.go b/vendor/local/encoder/bop_test.go new file mode 100644 index 0000000..b347d38 --- /dev/null +++ b/vendor/local/encoder/bop_test.go @@ -0,0 +1,111 @@ +package encoder + +import ( + "fmt" + "io/ioutil" + "local/encryptor" + "os" + "path" + "strings" + "testing" +) + +func benchmarkBopOp(bop BOP, op int, l int, b *testing.B) { + dir, err := os.Getwd() + if err != nil { + b.Fatalf("cannot get wd: %v", err) + } + input, err := ioutil.ReadFile(path.Join(dir, "bop.go")) + if err != nil { + b.Fatalf("cannot read bop.go: %v", err) + } + for len(input) < l { + input = append(input, input...) + } + if len(input) > l { + input = input[:l] + } + switch op { + case 0: + case 1: + input = bop.Wrap(input) + } + b.N = 4 + b.Run(fmt.Sprintf("%T-%v-%v", bop, op, len(input)), func(b *testing.B) { + for i := 0; i < b.N; i++ { + switch op { + case 0: + bop.Wrap([]byte(string(input))) + case 1: + bop.Unwrap([]byte(string(input))) + } + } + }) +} + +func Test_BOPs_Mem(t *testing.T) { + cases := []struct { + bop BOP + }{ + {bop: &AES{Key: []byte("hello")}}, + {bop: &PAR2{}}, + {bop: &LZ4{}}, + {bop: &Zipper{}}, + } + + base := 50000000 + scale := 10 + for _, c := range cases { + memoryRatioByOp := [4]float64{} + for op := 0; op < 4; op++ { + l := base + if op > 1 { + l *= scale + } + //name := fmt.Sprintf("%T-%d-%d", c.bop, op%2, l) + result := testing.Benchmark(func(b *testing.B) { + b.ReportAllocs() + b.SetBytes(1) + benchmarkBopOp(c.bop, op%2, l, b) + }) + if result.MemBytes > 0 { + memoryRatioByOp[op] = float64(result.MemBytes) / float64(l) + } + //t.Logf("%s: %v", name, memoryRatioByOp[op]) + } + for i := 0; i < 2; i++ { + t.Logf("%T-%d: %v -> %v (%v MB)", c.bop, i, memoryRatioByOp[i], memoryRatioByOp[i+2], memoryRatioByOp[i+2]*float64(scale)*float64(base)/1000/1000) + } + } +} + +func Test_BOPs(t *testing.T) { + cases := []struct { + name string + bop BOP + }{ + {name: "zipper", bop: &Zipper{}}, + {name: "snapper", bop: &snapper{}}, + {name: "symC", bop: &symCryptor{encryptor.NewEncryptor("", "")}}, + {name: "asymC", bop: &asymCryptor{encryptor.NewEncryptor("", "")}}, + {name: "salter", bop: &Salter{}}, + {name: "lz4", bop: &LZ4{}}, + {name: "aes", bop: &AES{Key: []byte("hello")}}, + {name: "par2", bop: &PAR2{}}, + } + + for _, c := range cases { + input := []byte(strings.Repeat("Hello world", 100)) + encoded := c.bop.Wrap(input) + decoded := c.bop.Unwrap(encoded) + if string(input) != string(decoded) { + t.Errorf("BOP %v failed: len(inp)=%v, len(enc)=%v, len(dec)=%v", c.name, len(input), len(encoded), len(decoded)) + } + } +} + +func Test_AES_Padding(t *testing.T) { + for i := 0; i < 100; i++ { + t.Logf("%v => %v", i, len((&AES{}).getPadding(int64(i)))) + } +} diff --git a/vendor/local/encoder/config.go b/vendor/local/encoder/config.go new file mode 100644 index 0000000..7755a06 --- /dev/null +++ b/vendor/local/encoder/config.go @@ -0,0 +1,7 @@ +package encoder + +type Config struct { + SymKey string + SymKeyOnly bool + KeyPath string +} diff --git a/vendor/local/encoder/encoder.go b/vendor/local/encoder/encoder.go new file mode 100644 index 0000000..c9aad98 --- /dev/null +++ b/vendor/local/encoder/encoder.go @@ -0,0 +1,252 @@ +package encoder + +import ( + "errors" + "io" + "local/encryptor" + "os" + "path" +) + +type Encoder struct { + bops []BOP +} + +func New(config *Config, bops ...BOP) (*Encoder, error) { + if len(bops) != 0 { + return &Encoder{bops: bops}, nil + } + + bops = []BOP{ + &Zipper{}, + &Salter{}, + } + + if config != nil { + if config.SymKey != "" { + bops = append(bops, &AES{Key: []byte(config.SymKey)}) + } + + if !config.SymKeyOnly { + var encr encryptor.Encryptor + if path.Base(config.KeyPath) == "env" { + pub := os.Getenv("PUB") + pri := os.Getenv("PRI") + if pub == "" || pri == "" { + return nil, errors.New("PUB and PRI cannot be empty") + } + encr = encryptor.NewEncryptor(pri, pub, false) + } else if config.KeyPath != "" { + encr = encryptor.NewEncryptor("", "", false) + priKeyPath := path.Join(config.KeyPath, "key.pri") + pubKeyPath := path.Join(config.KeyPath, "key.pub") + defer encr.ToFiles(priKeyPath, pubKeyPath) + if err := encr.FromFiles(priKeyPath, pubKeyPath); err != nil { + return nil, err + } + } else { + encr = encryptor.NewEncryptor("", "", false) + } + bops = append(bops, &asymCryptor{Encryptor: encr}) + } + } + + bops = append(bops, &Zipper{}) + return &Encoder{ + bops: bops, + }, nil +} + +func (e *Encoder) Encode2(r io.Reader) (io.Reader, error) { + pipeR, pipeW := io.Pipe() + go func() { + defer pipeW.Close() + for i := 0; i < len(e.bops); i++ { + r = e.bops[i].(BOP2).Wrap2(r) + } + if _, err := io.Copy(pipeW, r); err != nil { + panic(err) + } + }() + return pipeR, nil +} + +func (e *Encoder) Decode2(r io.Reader) (io.Reader, error) { + pipeR, pipeW := io.Pipe() + go func() { + defer pipeW.Close() + r = screenReader(r) + for i := len(e.bops) - 1; i >= 0; i-- { + r = e.bops[i].(BOP2).Unwrap2(r) + r = screenReader(r) + } + if _, err := io.Copy(pipeW, r); err != nil { + panic(err) + } + }() + return pipeR, nil +} + +func (e *Encoder) Encode3(r io.Reader) (io.Reader, error) { + pipeR, pipeW := io.Pipe() + + bopCh := make([]chan []byte, len(e.bops)+1) + inputChIndex := len(bopCh) - 1 + bopCh[inputChIndex] = make(chan []byte) + //[0]=bops[0]([n+1]) + //[1]=bops[1]([0]) + //... + //[n]=bops[n]([n-1]) + //[n+1]=firstin + for i := range e.bops { + bopCh[i] = e.bops[i].(BOP3).Wrap3(bopCh[(i-1+len(bopCh))%len(bopCh)]) + } + go func() { + defer pipeW.Close() + for input := range bopCh[inputChIndex-1] { + if _, err := pipeW.Write(input); err != nil { + panic(err) + } + } + }() + go func() { + defer close(bopCh[inputChIndex]) + buff := make([]byte, 64000) + for { + n, err := r.Read(buff) + if err != nil && err != io.EOF { + panic(err) + } + if n > 0 { + bopCh[inputChIndex] <- copyBSlice(buff[:n]) + } + if err == io.EOF { + break + } + } + }() + return pipeR, nil +} + +func (e *Encoder) Decode3(r io.Reader) (io.Reader, error) { + pipeR, pipeW := io.Pipe() + + bopCh := make([]chan []byte, len(e.bops)+1) + inputChIndex := len(bopCh) - 1 + bopCh[inputChIndex] = make(chan []byte) + //[0]=bops[0]([1]) + //[1]=bops[1]([2]) + //... + //[n]=bops[n]([n+1]) + //[n+1]=firstin + for i := len(e.bops) - 1; i >= 0; i-- { + bopCh[i] = e.bops[i].(BOP3).Unwrap3(bopCh[i+1]) + } + go func() { + defer pipeW.Close() + for input := range bopCh[0] { + if _, err := pipeW.Write(input); err != nil { + panic(err) + } + } + }() + go func() { + defer close(bopCh[inputChIndex]) + buff := make([]byte, 64000) + for { + n, err := r.Read(buff) + if err != nil && err != io.EOF { + panic(err) + } + if n > 0 { + bopCh[inputChIndex] <- copyBSlice(buff[:n]) + } + if err == io.EOF { + break + } + } + }() + return pipeR, nil +} + +func (e *Encoder) Encode(payload []byte, metadata ...[]byte) ([]byte, error) { + if len(payload) == 0 { + return nil, nil + } + + for i := range e.bops { + payload = e.bops[i].Wrap(payload) + if len(payload) == 0 { + return nil, errors.New("cannot encode payload") + } + } + + return e.WriteMetadata(payload, metadata) +} + +func (e *Encoder) Decode(payload []byte) ([]byte, error) { + metalen, err := e.metadataLength(payload) + if err != nil { + return nil, err + } + payload = payload[metalen:] + + if len(payload) == 0 { + return nil, nil + } + + for i := len(e.bops); i > 0; i-- { + payload = e.bops[i-1].Unwrap(payload) + if len(payload) == 0 { + return nil, errors.New("cannot decode payload") + } + } + + return payload, nil +} + +func (e *Encoder) WriteMetadata(payload []byte, metadata [][]byte) ([]byte, error) { + meta := []byte{byte(len(metadata))} + for i := range metadata { + meta = append(meta, byte(len(metadata[i]))) + meta = append(meta, metadata[i]...) + } + payload = append(meta, payload...) + return payload, nil +} + +func (e *Encoder) ReadMetadata(payload []byte) ([][]byte, error) { + metadata := [][]byte{} + if len(payload) < 2 { + return nil, nil + } + metalen := int(payload[0]) + payload = payload[1:] + for i := 0; i < metalen; i++ { + if len(payload) < 1 { + return nil, nil + } + j := payload[0] + if len(payload) < 1+int(j) { + return nil, nil + } + metadata = append(metadata, payload[1:1+int(j)]) + payload = payload[1+int(j):] + } + return metadata, nil +} + +func (e *Encoder) metadataLength(payload []byte) (int, error) { + metadata, err := e.ReadMetadata(payload) + if err != nil { + return 0, err + } + n := 1 + for i := range metadata { + n += 1 + len(metadata[i]) + } + if len(payload) < n { + return 0, nil + } + return n, nil +} diff --git a/vendor/local/encoder/encoder_test.go b/vendor/local/encoder/encoder_test.go new file mode 100644 index 0000000..790029c --- /dev/null +++ b/vendor/local/encoder/encoder_test.go @@ -0,0 +1,405 @@ +package encoder + +import ( + "bytes" + "crypto/aes" + "fmt" + "io" + "io/ioutil" + "local/encryptor" + "strings" + "testing" +) + +func Test_Encoder2(t *testing.T) { + cases := []struct { + bops []BOP + streamLength int + bufferCapacity int + }{ + { + bops: []BOP{ + &Zipper{}, + &Salter{}, + &AES{Key: []byte("key")}, + &Zipper{}, + }, + streamLength: 0, + bufferCapacity: 250, + }, + { + bops: []BOP{ + &Zipper{}, + &Salter{}, + &AES{Key: []byte("key")}, + &Zipper{}, + }, + streamLength: 76 * 1000 * 1000, + bufferCapacity: 250, + }, + { + bops: []BOP{ + &AES{Key: []byte("key")}, + }, + streamLength: 7500, + bufferCapacity: 250, + }, + { + bops: []BOP{ + &Salter{}, + }, + streamLength: 7500, + bufferCapacity: 250, + }, + { + bops: []BOP{ + &Zipper{}, + }, + streamLength: 7500, + bufferCapacity: 250, + }, + { + bops: []BOP{ + &AES{Key: []byte("key")}, + }, + streamLength: 75, + bufferCapacity: 25, + }, + { + bops: []BOP{ + &Salter{}, + }, + streamLength: 75, + bufferCapacity: 25, + }, + { + bops: []BOP{ + &Zipper{}, + }, + streamLength: 75, + bufferCapacity: 25, + }, + { + bops: []BOP{ + &Zipper{}, + &Salter{}, + &AES{Key: []byte("key")}, + &Zipper{}, + }, + streamLength: 7500, + bufferCapacity: 250, + }, + { + bops: []BOP{ + &Zipper{}, + &Salter{}, + &AES{Key: []byte("key")}, + &Zipper{}, + }, + streamLength: 75, + bufferCapacity: 25, + }, + } + + for _, c := range cases { + PipeBuffSize = c.bufferCapacity + enc, _ := New(nil, c.bops...) + input := strings.Repeat("hello world", c.streamLength)[:c.streamLength] + inputReader := strings.NewReader(input) + encodedReader, err := enc.Encode2(inputReader) + if err != nil { + t.Fatalf("cannot encode2: %v", err) + } + encoded, err := ioutil.ReadAll(encodedReader) + if err != nil { + t.Fatalf("cannot read encdoed: %v", err) + } + encodedReader = bytes.NewReader(encoded) + decodedReader, err := enc.Decode2(encodedReader) + if err != nil { + t.Fatalf("cannot decode2: %v", err) + } + out, err := ioutil.ReadAll(decodedReader) + if err != nil { + t.Fatalf("cannot gather decoded: %v", err) + } + if string(out) != input { + t.Errorf("wrong encdoed-decoded: got %v, wanted %v", len(out), len(input)) + } + } +} + +func Test_Encoder3_Enc(t *testing.T) { + was := PipeBuffSize + defer func() { + PipeBuffSize = was + }() + PipeBuffSize = aes.BlockSize + 2 + cases := []struct { + bops []BOP + }{ + {bops: []BOP{&Salter{}}}, + {bops: []BOP{&Zipper{}}}, + {bops: []BOP{&Zipper{}, &Salter{}}}, + {bops: []BOP{&Salter{}, &Zipper{}}}, + {bops: []BOP{&AES{Key: []byte("key")}}}, + } + + for _, c := range cases { + title := "---" + for i := range c.bops { + title += fmt.Sprintf(" %T", c.bops[i]) + } + enc, err := New(nil, c.bops...) + if err != nil { + t.Fatalf("cannot create new encoder: %v", err) + } + input := strings.Repeat("hello world", PipeBuffSize*2)[:PipeBuffSize*2] + inputReader := bytes.NewBuffer([]byte(input)) + encodeReader, err := enc.Encode3(inputReader) + if err != nil { + t.Fatalf("cannot get encode reader: %v", err) + } + out, err := ioutil.ReadAll(encodeReader) + if err != nil { + t.Fatalf("cannot read from decode reader: %v", err) + } + t.Logf("%s : %s => %s", title, input, out) + } +} +func Test_Encoder3_All(t *testing.T) { + was := PipeBuffSize + defer func() { + PipeBuffSize = was + }() + PipeBuffSize = aes.BlockSize + 2 + cases := []struct { + bops []BOP + }{ + {bops: []BOP{&Salter{}}}, + {bops: []BOP{&Zipper{}}}, + {bops: []BOP{&AES{Key: []byte("key")}}}, + {bops: []BOP{&Zipper{}, &Salter{}}}, + {bops: []BOP{&Salter{}, &Zipper{}}}, + {bops: []BOP{&Zipper{}, &Salter{}, &AES{Key: []byte("key")}, &Zipper{}}}, + } + + for _, c := range cases { + title := "///" + for i := range c.bops { + title += fmt.Sprintf(" %T", c.bops[i]) + } + enc, err := New(nil, c.bops...) + if err != nil { + t.Fatalf("cannot create new encoder: %v", err) + } + input := strings.Repeat("hello world", PipeBuffSize*2)[:PipeBuffSize*2] + inputReader := bytes.NewBuffer([]byte(input)) + encodeReader, err := enc.Encode3(inputReader) + if err != nil { + t.Fatalf("cannot get encode reader: %v", err) + } + var decodeReader io.Reader + if false { + encodedString, err := ioutil.ReadAll(encodeReader) + if err != nil { + t.Fatalf("cannot gather encoded: %v", err) + } + decodeReader, err = enc.Decode3(bytes.NewBuffer(encodedString)) + } else { + decodeReader, err = enc.Decode3(encodeReader) + } + if err != nil { + t.Fatalf("cannot get decode reader: %v", err) + } + out, err := ioutil.ReadAll(decodeReader) + if err != nil { + t.Fatalf("cannot read from decode reader: %v", err) + } + if string(out) != input { + t.Errorf("failed test with %v bops", len(c.bops)) + } + t.Logf("%v : %s => %s", c.bops, input, out) + } +} + +func Test_Encoder(t *testing.T) { + input := "My secret secret" + conf := &Config{ + SymKey: "letme123in", + SymKeyOnly: false, + KeyPath: "", + } + enc, err := New(conf) + if err != nil { + t.Fatalf("cannot create new encoder: %v", err) + } + + packed, err := enc.Encode([]byte(input), []byte("meta"), []byte("META 22222!!!!")) + if err != nil { + t.Fatalf("cannot encode with new encoder: %v", err) + } + unpacked, err := enc.Decode(packed) + if err != nil { + t.Fatalf("cannot decode with new encoder: %v", err) + } + if string(unpacked) != input { + t.Fatalf("unpacked != input: %v vs %v", string(unpacked), input) + } + + packed, err = enc.Encode([]byte(input)) + if err != nil { + t.Fatalf("cannot encode with new encoder: %v", err) + } + unpacked, err = enc.Decode(packed) + if err != nil { + t.Fatalf("cannot decode with new encoder: %v", err) + } + if string(unpacked) != input { + t.Fatalf("unpacked != input: %v vs %v", string(unpacked), input) + } + + t.Logf("prepacked: %q, packed len: %v, unpacked: %q", input, len(packed), string(unpacked)) +} + +var metaname = []byte("META NAME") +var metavalue = []byte("META VALUE") + +func Test_Encoder_BOP_Combos(t *testing.T) { + enc := encryptor.NewEncryptor("", "") + sym := encryptor.NewEncryptor("", "") + sym.SetSymmetric(sym.GetPublic()) + + encAndDec(t, makeSomeEnc(), "default") + encAndDec(t, makeSomeEnc( + &Salter{}, + &asymCryptor{Encryptor: enc}, + &AES{Key: []byte(sym.GetPublic())}, + &Zipper{}, + ), "salt_asym_sym_zip") + encAndDec(t, makeSomeEnc( + &Zipper{}, + &Salter{}, + &asymCryptor{Encryptor: enc}, + &AES{Key: []byte(sym.GetPublic())}, + &Zipper{}, + ), "zip_salt_asym_sym_zip") + encAndDec(t, makeSomeEnc( + &snapper{}, + &Salter{}, + &asymCryptor{Encryptor: enc}, + &AES{Key: []byte(sym.GetPublic())}, + &snapper{}, + ), "snap_salt_asym_sym_snap") + encAndDec(t, makeSomeEnc( + &Salter{}, + &asymCryptor{Encryptor: enc}, + &AES{Key: []byte(sym.GetPublic())}, + &Zipper{}, + ), "salt_asym_sym_zip") + encAndDec(t, makeSomeEnc( + &Zipper{}, + &Salter{}, + &asymCryptor{Encryptor: enc}, + &AES{Key: []byte(sym.GetPublic())}, + ), "zip_salt_asym_sym") + encAndDec(t, makeSomeEnc( + &Zipper{}, + &Salter{}, + &AES{Key: []byte(sym.GetPublic())}, + &asymCryptor{Encryptor: enc}, + &Zipper{}, + ), "zip_salt_sym_asym_zip") + encAndDec(t, makeSomeEnc( + &Zipper{}, + &Salter{n: 50}, + &AES{Key: []byte(sym.GetPublic())}, + &asymCryptor{Encryptor: enc}, + &Zipper{}, + ), "zip_salt50_sym_asym_zip") + encAndDec(t, makeSomeEnc( + &Zipper{}, + &Salter{n: 10}, + &AES{Key: []byte(sym.GetPublic())}, + &asymCryptor{Encryptor: enc}, + &Zipper{}, + ), "zip_salt10_sym_asym_zip") + syms := []encryptor.Encryptor{} + for i := 0; i < 10; i++ { + e := encryptor.NewEncryptor("", "") + e.SetSymmetric(e.GetPublic()) + syms = append(syms, e) + } + encAndDec(t, makeSomeEnc( + &Zipper{}, + &Salter{n: 10}, + &AES{Key: []byte(syms[0].GetPublic())}, + &AES{Key: []byte(syms[1].GetPublic())}, + &AES{Key: []byte(syms[2].GetPublic())}, + &AES{Key: []byte(syms[3].GetPublic())}, + &AES{Key: []byte(syms[4].GetPublic())}, + &AES{Key: []byte(syms[5].GetPublic())}, + &Zipper{}, + ), "zip_salt10_sym6_zip") + encAndDec(t, makeSomeEnc( + &Salter{n: 10}, + &Zipper{}, + &AES{Key: []byte(sym.GetPublic())}, + &Zipper{}, + ), "salt10_zip_sym_zip") + encAndDec(t, makeSomeEnc( + &Salter{n: 10}, + &LZ4{}, + &AES{Key: []byte(sym.GetPublic())}, + &LZ4{}, + ), "salt10_lz4_sym_lz4") + encAndDec(t, makeSomeEnc( + &LZ4{}, + &Salter{n: 10}, + &AES{Key: []byte(sym.GetPublic())}, + &LZ4{}, + ), "salt10_lz4_sym_lz4") + encAndDec(t, makeSomeEnc( + &LZ4{}, + ), "lz4") + encAndDec(t, makeSomeEnc( + &Zipper{}, + ), "zip") +} + +func encAndDec(t *testing.T, enc *Encoder, name string) { + input := readSomeInput() + packed, err := enc.Encode(input, metaname, metavalue) + if err != nil { + t.Fatal(err) + } + unpacked, err := enc.Decode(packed) + if err != nil { + t.Fatal(err) + } + if string(unpacked) != string(input) { + t.Fatalf("Unpacked != input: len %v vs %v", len(unpacked), len(input)) + } + t.Logf("%30q: %4d -> %4d when packed (%d%%)", name, len(input), len(packed), 100.0*len(packed)/len(input)) +} + +func makeSomeEnc(bops ...BOP) *Encoder { + conf := &Config{ + SymKey: "letme123in", + SymKeyOnly: false, + KeyPath: "", + } + e, err := New(conf, bops...) + if err != nil { + panic(err) + } + return e +} + +func readSomeInput() []byte { + b, err := ioutil.ReadFile("./encoder.go") + if err != nil { + panic(err) + } + return b +} diff --git a/vendor/local/encoder/pipe/pipe.go b/vendor/local/encoder/pipe/pipe.go new file mode 100644 index 0000000..001c508 --- /dev/null +++ b/vendor/local/encoder/pipe/pipe.go @@ -0,0 +1,80 @@ +package pipe + +import ( + "fmt" + "io" +) + +type PipeReader struct { + last []byte + buff chan []byte + capacity int +} + +func New() *PipeReader { + return &PipeReader{ + buff: make(chan []byte), + capacity: 64000, + last: nil, + } +} + +func (pr *PipeReader) SetCap(n int) { + pr.capacity = n +} + +func (pr *PipeReader) String() string { + return fmt.Sprintf("buf=%v, cap=%v, last=%v", len(pr.buff), pr.capacity, len(pr.last)) +} + +func (pr *PipeReader) Read(b []byte) (int, error) { + ttl := 0 + m, n, hasMore := xfer(b, pr.last) + pr.last = m + ttl = n + if hasMore { + return ttl, nil + } + for m := range pr.buff { + m, n, hasMore := xfer(b[ttl:], m) + pr.last = m + ttl += n + if hasMore { + return ttl, nil + } + } + return ttl, io.EOF +} + +func (pr *PipeReader) Write(b []byte) (int, error) { + chunklen := pr.capacity / (1 + len(pr.buff)) + wrote := 0 + for wrote+chunklen < len(b) { + pr.buff <- copyByteSlice(b[wrote : wrote+chunklen]) + wrote += chunklen + } + pr.buff <- copyByteSlice(b[wrote:]) + return wrote + len(b[wrote:]), nil +} + +func (pr *PipeReader) Close() error { + close(pr.buff) + return nil +} + +func copyByteSlice(b []byte) []byte { + return append([]byte{}, b...) +} + +func xfer(dst, src []byte) ([]byte, int, bool) { + min := len(dst) + if len(src) < min { + min = len(src) + } + copy(dst[:min], src[:min]) + src = src[min:] + if len(src) > 0 { + return src, min, true + } + return src, min, false +} diff --git a/vendor/local/encoder/pipe/pipe_test.go b/vendor/local/encoder/pipe/pipe_test.go new file mode 100644 index 0000000..61fb76d --- /dev/null +++ b/vendor/local/encoder/pipe/pipe_test.go @@ -0,0 +1,83 @@ +package pipe + +import ( + "io/ioutil" + "strings" + "testing" +) + +func Test_PipeReader_Bench(t *testing.T) { + input := []byte(strings.Repeat("hello world", 1000)) + pr := New() + pr.SetCap(1000) + writing := func() { + defer pr.Close() + if n, err := pr.Write(input); err != nil { + t.Errorf("failed to write: %v", err) + } else if n != len(input) { + t.Errorf("failed to write: wrote %v, expected %v", n, len(input)) + } + } + reading := func() { + if bytes, err := ioutil.ReadAll(pr); err != nil { + t.Errorf("failed to read: %v", err) + } else if len(bytes) != len(input) { + t.Errorf("failed to read: read %v, expected %v", len(bytes), len(input)) + } + } + go writing() + reading() +} + +func Test_PipeReader(t *testing.T) { + cases := []struct { + streamLength int + bufferCap int + }{ + { + streamLength: 10000000, + bufferCap: 50, + }, + { + streamLength: 1000000, + bufferCap: 5000, + }, + { + streamLength: 100, + bufferCap: 50, + }, + { + streamLength: 50, + bufferCap: 100, + }, + { + streamLength: 10, + bufferCap: 5, + }, + { + streamLength: 5, + bufferCap: 10, + }, + } + + for _, c := range cases { + pr := New() + pr.SetCap(c.bufferCap) + input := []byte(strings.Repeat("hello world", c.streamLength)[:c.streamLength]) + go func() { + defer pr.Close() + n, err := pr.Write(input) + if n != c.streamLength || err != nil { + t.Errorf("ERR: failed to write %v bytes to %v cap: %v", c.streamLength, c.bufferCap, err) + } + t.Logf("wrote %v bytes to pipereader", n) + }() + output, err := ioutil.ReadAll(pr) + if err != nil { + t.Errorf("ERR: failed to read %v bytes to %v cap: %v", c.streamLength, c.bufferCap, err) + } else if string(output) != string(input) { + t.Errorf("ERR: sl=%v, bc=%v, read wrong output from pipe: \nwanted %v, \n got %v", c.streamLength, c.bufferCap, len(input), len(output)) + } + t.Logf("read %v bytes from pipereader", len(output)) + } +} diff --git a/vendor/local/encryptor b/vendor/local/encryptor new file mode 160000 index 0000000..4b65d5e --- /dev/null +++ b/vendor/local/encryptor @@ -0,0 +1 @@ +Subproject commit 4b65d5e4a7a4bf79b4a4ec58cae2b04ce24f6387 diff --git a/vendor/local/logger/.gitignore b/vendor/local/logger/.gitignore new file mode 100755 index 0000000..7c82fcf --- /dev/null +++ b/vendor/local/logger/.gitignore @@ -0,0 +1 @@ +logger diff --git a/vendor/local/logger/logger.go b/vendor/local/logger/logger.go index 97a20ea..add1f14 100755 --- a/vendor/local/logger/logger.go +++ b/vendor/local/logger/logger.go @@ -14,6 +14,10 @@ var lastWasReturn = false var ErrCantConfigLog = errors.New("cannot configure log") +func ConfigFile(f *os.File) { + outfile = f +} + func Config(path string) error { if path == "" { return nil