How to use the paramiko.message.Message function in paramiko

def _message_without_signature(self):
        m = Message()
        m.add_string('ssh-rsa-cert-v01@openssh.com')
        m.add_string(self.nonce)
        m.add_mpint(self.public_numbers.e)
        m.add_mpint(self.public_numbers.n)
        m.add_int64(self.serial)
        m.add_int(self.type)
        m.add_string(self.key_id)
        m.add_string(self.valid_principals)
        m.add_int64(self.valid_after)
        m.add_int64(self.valid_before)
        m.add_string(self.critical_options)
        m.add_string(self.extensions)
        m.add_string(self.reserved)
        m.add_string(self.signature_key)
        return m

def _read_response(self, waitfor=None):
        while True:
            try:
                t, data = self._read_packet()
            except EOFError as e:
                raise SSHException('Server connection dropped: %s' % str(e))
            msg = Message(data)
            num = msg.get_int()
            self._lock.acquire()
            try:
                if num not in self._expecting:
                    # might be response for a file that was closed before responses came back
                    self._log(DEBUG, 'Unexpected response #%d' % (num,))
                    if waitfor is None:
                        # just doing a single check
                        break
                    continue
                fileobj = self._expecting[num]
                del self._expecting[num]
            finally:
                self._lock.release()
            if num == waitfor:
                # synchronous

def request_forward_agent(self, handler):
        """
        Request for a forward SSH Agent on this channel.
        This is only valid for an ssh-agent from OpenSSH !!!

        :param function handler:
            a required handler to use for incoming SSH Agent connections

        :return: True if we are ok, else False (at that time we always return ok)

        :raises: SSHException in case of channel problem.
        """
        m = Message()
        m.add_byte(cMSG_CHANNEL_REQUEST)
        m.add_int(self.remote_chanid)
        m.add_string('auth-agent-req@openssh.com')
        m.add_boolean(False)
        self.transport._send_user_message(m)
        self.transport._set_forward_agent_handler(handler)
        return True

def _read_response(self, waitfor=None):
        while True:
            try:
                t, data = self._read_packet()
            except EOFError as e:
                raise SSHException('Server connection dropped: %s' % str(e))
            msg = Message(data)
            num = msg.get_int()
            self._lock.acquire()
            try:
                if num not in self._expecting:
                    # might be response for a file that was closed before
                    # responses came back
                    self._log(DEBUG, 'Unexpected response #%d' % (num,))
                    if waitfor is None:
                        # just doing a single check
                        break
                    continue
                fileobj = self._expecting[num]
                del self._expecting[num]
            finally:
                self._lock.release()
            if num == waitfor:

def _verify_key(self, host_key, sig):
        key = self._key_info[self.host_key_type](Message(host_key))
        if key is None:
            raise SSHException('Unknown host key type')
        if not key.verify_ssh_sig(self.H, Message(sig)):
            raise SSHException('Signature verification ({}) failed.'.format(self.host_key_type)) # noqa
        self.host_key = key

def __init__(self, agent, blob):
        self.agent = agent
        self.blob = blob
        self.name = Message(blob).get_text()

INFO, "Auth rejected: unsupported or mangled public key"
                )
                key = None
            if key is None:
                self._disconnect_no_more_auth()
                return
            # first check if this key is okay... if not, we can skip the verify
            result = self.transport.server_object.check_auth_publickey(
                username, key
            )
            if result != AUTH_FAILED:
                # key is okay, verify it
                if not sig_attached:
                    # client wants to know if this key is acceptable, before it
                    # signs anything...  send special "ok" message
                    m = Message()
                    m.add_byte(cMSG_USERAUTH_PK_OK)
                    m.add_string(keytype)
                    m.add_string(keyblob)
                    self.transport._send_message(m)
                    return
                sig = Message(m.get_binary())
                blob = self._get_session_blob(key, service, username)
                if not key.verify_ssh_sig(blob, sig):
                    self.transport._log(
                        INFO, "Auth rejected: invalid signature"
                    )
                    result = AUTH_FAILED
        elif method == "keyboard-interactive":
            submethods = m.get_string()
            result = self.transport.server_object.check_auth_interactive(
                username, submethods

def _close_internal(self):
        # you are holding the lock.
        if not self.active or self.closed:
            return None, None
        m1 = self._send_eof()
        m2 = Message()
        m2.add_byte(cMSG_CHANNEL_CLOSE)
        m2.add_int(self.remote_chanid)
        self._set_closed()
        # can't unlink from the Transport yet -- the remote side may still
        # try to send meta-data (exit-status, etc)
        return m1, m2

self.transport._send_message(m)
                    while True:
                        ptype, m = self.transport.packetizer.read_message()
                        if ptype == MSG_USERAUTH_GSSAPI_TOKEN:
                            srv_token = m.get_string()
                            next_token = sshgss.ssh_init_sec_context(self.gss_host,
                                                                     mech,
                                                                     self.username,
                                                                     srv_token)
                            # After this step the GSSAPI should not return any
                            # token. If it does, we keep sending the token to
                            # the server until no more token is returned.
                            if next_token is None:
                                break
                            else:
                                m = Message()
                                m.add_byte(cMSG_USERAUTH_GSSAPI_TOKEN)
                                m.add_string(next_token)
                                self.transport.send_message(m)
                    else:
                        raise SSHException("Received Package: %s" % MSG_NAMES[ptype])
                    m = Message()
                    m.add_byte(cMSG_USERAUTH_GSSAPI_MIC)
                    # send the MIC to the server
                    m.add_string(sshgss.ssh_get_mic(self.transport.session_id))
                elif ptype == MSG_USERAUTH_GSSAPI_ERRTOK:
                    # RFC 4462 says we are not required to implement GSS-API
                    # error messages.
                    # See RFC 4462 Section 3.8 in
                    # http://www.ietf.org/rfc/rfc4462.txt
                    raise SSHException("Server returned an error token")
                elif ptype == MSG_USERAUTH_GSSAPI_ERROR: