code: def _parse_kexgss_hostkey(self, m):
          
          # client mode
          host_key = m.get_string()
          self.transport.host_key = host_key
          sig = m.get_string()
          self.transport._verify_key(host_key, sig)
          self.transport._expect_packet(MSG_KEXGSS_CONTINUE, MSG_KEXGSS_COMPLETE)
docs: Parse the SSH2_MSG_KEXGSS_HOSTKEY message (client mode).
  
          :param `.Message` m: The content of the SSH2_MSG_KEXGSS_HOSTKEY message