def encodePacket(self, addr, data):
sessionKey = self.makeSession(addr, True)
if not sessionKey:
print('Unknown address', addr, 'trying introduction...')
sessionKey = self.introducer.makeIntroduction(addr, self.sock)
if not sessionKey:
print('Introduction failed.')
return
packet = DataPacket()
packet.createDataPacket(sessionKey, data, self.keys.entropy)
return packet
def decodePacket(self, addr, data):
sessionKey = self.makeSession(
addr, False
) # Don't introduce yourself when you receive a packet from an unknown host, that's not the protocol
if sessionKey: # Must be a data packet
packet = DataPacket()
packet.decodeDataPacket(sessionKey, data)
if packet.checkMac() and packet.checkTimestamp():
return packet
else:
print('Integrity failed', packet.checkMac(),
packet.checkTimestamp())
return None
else: # Must be an intro packet
print('Unknown address', addr)
if self.introducer:
intro = self.introducer.acceptIntroduction(data, addr)
if intro:
return intro
else:
return None
