###   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