def on_message(self, device: Device, message: bytes) -> dict:
if validate_token(message):
self.logger.encrypted_message("Received bytes: {}".format(message))
message = decrypt(message, device.key)
self.logger.message("Received decrypted: {}".format(message))
try:
message = json.loads(message, cls=MessageDecoder)
except json.JSONDecodeError as e:
self.logger.error("Failed to decode message {}: {}".format(
message, e))
raise Exception("Failed to decode message")
if device.is_verified():
return message
else:
if message.get("event_type") == "assign":
if str(message.get(
"encryption_key")).encode() == device.custom_key:
device.key = device.custom_key
device.set_verified(True)
self.connected.emit(device, device.ip(), device.port())
self.logger.info("Device {} validated".format(
device.id()))
else:
self.logger.warning(
"Assigned keys do not match! Bot {} will be kicked!"
.format(device.id()))
device.kick()
else:
self.decryption_error.emit(device, message)
raise Exception("Message is not valid")
return {}
def on_connected(self, device: Device, ip, port):
device.key = self.key
device.custom_key = generate_key()
device.write({
"event_type": "assign",
"encryption_key": device.custom_key.decode()
})