def communicate(self, request): """Process SSH key signing request""" # pylint: disable=no-self-use packet = SSHPacket(request) request = packet.get_string() packet.check_end() packet = SSHPacket(request) version = packet.get_byte() _ = packet.get_uint32() # sock_fd data = packet.get_string() packet.check_end() if version == 0: return b'', b'' elif version == 1: return b'', b'invalid request' else: skey = asyncssh.load_keypairs('skey')[0] sig = skey.sign(data) return String(Byte(KEYSIGN_VERSION) + String(sig)), b''