63 lines
1.7 KiB
JavaScript
63 lines
1.7 KiB
JavaScript
class NewAuthToken {
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constructor(key) {
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if (!key) {
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throw "invalid key"
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}
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this.key = key.repeat(32).substr(0, 32)
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}
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decode(b64, callback) {
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var ciphertext = this.base64_decode(b64)
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var iv = ciphertext.substr(0, 12)
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var encrypted = ciphertext.substr(iv.length, ciphertext.length-iv.length)
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this.get_crypto_key()
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.then(function(crypto_key) {
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NewAuthToken.decrypt(crypto_key, iv, encrypted, callback)
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})
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}
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base64_decode(b64) {
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return atob(b64)
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}
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static to_buffer(s) {
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var bytes = new Uint8Array(s.length)
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for (var i = 0; i < s.length; i++) {
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bytes[i] = s.charCodeAt(i)
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}
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return bytes.buffer
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}
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static decrypt(crypto_key, iv, encrypted, callback) {
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window.crypto.subtle.decrypt(
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{name: "AES-GCM", iv: NewAuthToken.to_buffer(iv)},
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crypto_key,
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NewAuthToken.to_buffer(encrypted),
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)
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.then(function(decrypted) {
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callback(String.fromCharCode.apply(null, new Uint8Array(decrypted)))
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})
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}
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get_crypto_key() {
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return crypto.subtle.importKey(
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"raw",
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NewAuthToken.to_buffer(this.key),
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"AES-GCM",
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false,
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["decrypt"]
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)
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}
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set_token(encoded_token) {
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this.decode(encoded_token, function (token) {
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console.log("Set-Cookie DnDex-Auth="+token)
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document.cookie = "DnDex-Auth=" + token + ";path=/"
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})
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}
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}
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authtoken = new NewAuthToken("123").set_token("SOY05yF/9iv3YG71sKkQPVaEwO53PCX8qZhDHS9JUohBgVl5Qr9/GTKK/TJ6OozhHN7QBIGmHNzQxTRRSLs4Lw==")
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