Python paramiko 模块，message() 实例源码

def _send_user_message(self, data):
        """
        send a message, but block if we're in key negotiation.  this is used
        for user-initiated requests.
        """
        start = time.time()
        while True:
            self.clear_to_send.wait(0.1)
            if not self.active:
                self._log(DEBUG, 'Dropping user packet because connection is dead.')
                return
            self.clear_to_send_lock.acquire()
            if self.clear_to_send.isSet():
                break
            self.clear_to_send_lock.release()
            if time.time() > start + self.clear_to_send_timeout:
                raise SSHException('Key-exchange timed out waiting for key negotiation')
        try:
            self._send_message(data)
        finally:
            self.clear_to_send_lock.release()

def _send_user_message(self, data):
        """
        send a message, but block if we're in key negotiation.  this is used
        for user-initiated requests.
        """
        start = time.time()
        while True:
            self.clear_to_send.wait(0.1)
            if not self.active:
                self._log(DEBUG, 'Dropping user packet because connection is dead.')
                return
            self.clear_to_send_lock.acquire()
            if self.clear_to_send.is_set():
                break
            self.clear_to_send_lock.release()
            if time.time() > start + self.clear_to_send_timeout:
                raise SSHException('Key-exchange timed out waiting for key negotiation')
        try:
            self._send_message(data)
        finally:
            self.clear_to_send_lock.release()

def _send_user_message(self, data):
        """
        send a message, but block if we're in key negotiation.  this is used
        for user-initiated requests.
        """
        start = time.time()
        while True:
            self.clear_to_send.wait(0.1)
            if not self.active:
                self._log(DEBUG, 'Dropping user packet because connection is dead.')
                return
            self.clear_to_send_lock.acquire()
            if self.clear_to_send.is_set():
                break
            self.clear_to_send_lock.release()
            if time.time() > start + self.clear_to_send_timeout:
                raise SSHException('Key-exchange timed out waiting for key negotiation')
        try:
            self._send_message(data)
        finally:
            self.clear_to_send_lock.release()

def _send_user_message(self, data):
        """
        send a message, but block if we're in key negotiation.  this is used
        for user-initiated requests.
        """
        start = time.time()
        while True:
            self.clear_to_send.wait(0.1)
            if not self.active:
                self._log(DEBUG, 'Dropping user packet because connection is dead.')
                return
            self.clear_to_send_lock.acquire()
            if self.clear_to_send.is_set():
                break
            self.clear_to_send_lock.release()
            if time.time() > start + self.clear_to_send_timeout:
                raise SSHException('Key-exchange timed out waiting for key negotiation')
        try:
            self._send_message(data)
        finally:
            self.clear_to_send_lock.release()

def _send_user_message(self, data):
        """
        send a message, but block if we're in key negotiation.  this is used
        for user-initiated requests.
        """
        start = time.time()
        while True:
            self.clear_to_send.wait(0.1)
            if not self.active:
                self._log(DEBUG, 'Dropping user packet because connection is dead.') # noqa
                return
            self.clear_to_send_lock.acquire()
            if self.clear_to_send.is_set():
                break
            self.clear_to_send_lock.release()
            if time.time() > start + self.clear_to_send_timeout:
                raise SSHException('Key-exchange timed out waiting for key negotiation') # noqa
        try:
            self._send_message(data)
        finally:
            self.clear_to_send_lock.release()

def _send_user_message(self, data):
        """
        send a message, but block if we're in key negotiation.  this is used
        for user-initiated requests.
        """
        start = time.time()
        while True:
            self.clear_to_send.wait(0.1)
            if not self.active:
                self._log(DEBUG, 'Dropping user packet because connection is dead.') # noqa
                return
            self.clear_to_send_lock.acquire()
            if self.clear_to_send.is_set():
                break
            self.clear_to_send_lock.release()
            if time.time() > start + self.clear_to_send_timeout:
                raise SSHException('Key-exchange timed out waiting for key negotiation') # noqa
        try:
            self._send_message(data)
        finally:
            self.clear_to_send_lock.release()

def _parse_kexgss_continue(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_CONTINUE message.

        :param `.Message` m: The content of the SSH2_MSG_KEXGSS_CONTINUE
            message
        """
        if not self.transport.server_mode:
            srv_token = m.get_string()
            m = Message()
            m.add_byte(c_MSG_KEXGSS_CONTINUE)
            m.add_string(self.kexgss.ssh_init_sec_context(
                target=self.gss_host, recv_token=srv_token))
            self.transport.send_message(m)
            self.transport._expect_packet(
                MSG_KEXGSS_CONTINUE,
                MSG_KEXGSS_COMPLETE,
                MSG_KEXGSS_ERROR
            )
        else:
            pass

def _parse_kexgss_error(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_ERROR message (client mode).
        The server may send a GSS-API error message. if it does, we display
        the error by throwing an exception (client mode).

        :param `.Message` m: The content of the SSH2_MSG_KEXGSS_ERROR message
        :raise SSHException: Contains GSS-API major and minor status as well as
                             the error message and the language tag of the
                             message
        """
        maj_status = m.get_int()
        min_status = m.get_int()
        err_msg = m.get_string()
        m.get_string()   # we don't care about the language!
        raise SSHException("GSS-API Error:\nMajor Status: %s\nMinor Status: %s\
                            \nError Message: %s\n") % (str(maj_status),
                                                       str(min_status),
                                                       err_msg)

def _parse_kexgss_error(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_ERROR message (client mode).
        The server may send a GSS-API error message. if it does, we display
        the error by throwing an exception (client mode).

        :param `Message` m:  The content of the SSH2_MSG_KEXGSS_ERROR message
        :raise SSHException: Contains GSS-API major and minor status as well as
                             the error message and the language tag of the
                             message
        """
        maj_status = m.get_int()
        min_status = m.get_int()
        err_msg = m.get_string()
        m.get_string()   # we don't care about the language (lang_tag)!
        raise SSHException("GSS-API Error:\nMajor Status: %s\nMinor Status: %s\
                            \nError Message: %s\n") % (str(maj_status),
                                                       str(min_status),
                                                       err_msg)

def _send_user_message(self, data):
        """
        send a message, but block if we're in key negotiation.  this is used
        for user-initiated requests.
        """
        start = time.time()
        while True:
            self.clear_to_send.wait(0.1)
            if not self.active:
                self._log(DEBUG, 'Dropping user packet because connection is dead.')
                return
            self.clear_to_send_lock.acquire()
            if self.clear_to_send.is_set():
                break
            self.clear_to_send_lock.release()
            if time.time() > start + self.clear_to_send_timeout:
                raise SSHException('Key-exchange timed out waiting for key negotiation')
        try:
            self._send_message(data)
        finally:
            self.clear_to_send_lock.release()

def _send_user_message(self, data):
        """
        send a message, but block if we're in key negotiation.  this is used
        for user-initiated requests.
        """
        start = time.time()
        while True:
            self.clear_to_send.wait(0.1)
            if not self.active:
                self._log(DEBUG, 'Dropping user packet because connection is dead.')
                return
            self.clear_to_send_lock.acquire()
            if self.clear_to_send.is_set():
                break
            self.clear_to_send_lock.release()
            if time.time() > start + self.clear_to_send_timeout:
                raise SSHException('Key-exchange timed out waiting for key negotiation')
        try:
            self._send_message(data)
        finally:
            self.clear_to_send_lock.release()

def compute_hmac(key, message, digest_class):
    return HMAC(key, message, digest_class).digest()

def _parse_kexgss_hostkey(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_HOSTKEY message (client mode).

        :param `.Message` m: The content of the SSH2_MSG_KEXGSS_HOSTKEY message
        """
        # 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)

def _parse_kexgss_complete(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_COMPLETE message (client mode).

        :param `.Message` m: The content of the
            SSH2_MSG_KEXGSS_COMPLETE message
        """
        # client mode
        if self.transport.host_key is None:
            self.transport.host_key = NullHostKey()
        self.f = m.get_mpint()
        if (self.f < 1) or (self.f > self.P - 1):
            raise SSHException('Server kex "f" is out of range')
        mic_token = m.get_string()
        # This must be TRUE, if there is a GSS-API token in this message.
        bool = m.get_boolean()
        srv_token = None
        if bool:
            srv_token = m.get_string()
        K = pow(self.f, self.x, self.P)
        # okay, build up the hash H of
        # (V_C || V_S || I_C || I_S || K_S || e || f || K)
        hm = Message()
        hm.add(self.transport.local_version, self.transport.remote_version,
        self.transport.local_kex_init, self.transport.remote_kex_init)
        hm.add_string(self.transport.host_key.__str__())
        hm.add_mpint(self.e)
        hm.add_mpint(self.f)
        hm.add_mpint(K)
        self.transport._set_K_H(K, sha1(str(hm)).digest())
        if srv_token is not None:
            self.kexgss.ssh_init_sec_context(target=self.gss_host,
                                             recv_token=srv_token)
            self.kexgss.ssh_check_mic(mic_token,
                                      self.transport.session_id)
        else:
            self.kexgss.ssh_check_mic(mic_token,
                                      self.transport.session_id)
        self.transport._activate_outbound()

def _parse_kexgss_group(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_GROUP message (client mode).

        :param `Message` m: The content of the SSH2_MSG_KEXGSS_GROUP message
        """
        self.p = m.get_mpint()
        self.g = m.get_mpint()
        # reject if p's bit length < 1024 or > 8192
        bitlen = paramiko.util.bit_length(self.p)
        if (bitlen < 1024) or (bitlen > 8192):
            raise SSHException(
                'Server-generated gex p (don\'t ask) is out of range '
                '(%d bits)' % bitlen)
        self.transport._log(DEBUG, 'Got server p (%d bits)' % bitlen)  # noqa
        self._generate_x()
        # now compute e = g^x mod p
        self.e = pow(self.g, self.x, self.p)
        m = Message()
        m.add_byte(c_MSG_KEXGSS_INIT)
        m.add_string(self.kexgss.ssh_init_sec_context(target=self.gss_host))
        m.add_mpint(self.e)
        self.transport._send_message(m)
        self.transport._expect_packet(MSG_KEXGSS_HOSTKEY,
                                      MSG_KEXGSS_CONTINUE,
                                      MSG_KEXGSS_COMPLETE,
                                      MSG_KEXGSS_ERROR)

def _parse_kexgss_hostkey(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_HOSTKEY message (client mode).

        :param `Message` m: The content of the SSH2_MSG_KEXGSS_HOSTKEY message
        """
        # 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)

def _parse_kexgss_groupreq(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_GROUPREQ message (server mode).

        :param `.Message` m: The content of the
            SSH2_MSG_KEXGSS_GROUPREQ message
        """
        minbits = m.get_int()
        preferredbits = m.get_int()
        maxbits = m.get_int()
        # smoosh the user's preferred size into our own limits
        if preferredbits > self.max_bits:
            preferredbits = self.max_bits
        if preferredbits < self.min_bits:
            preferredbits = self.min_bits
        # fix min/max if they're inconsistent.  technically, we could just pout
        # and hang up, but there's no harm in giving them the benefit of the
        # doubt and just picking a bitsize for them.
        if minbits > preferredbits:
            minbits = preferredbits
        if maxbits < preferredbits:
            maxbits = preferredbits
        # now save a copy
        self.min_bits = minbits
        self.preferred_bits = preferredbits
        self.max_bits = maxbits
        # generate prime
        pack = self.transport._get_modulus_pack()
        if pack is None:
            raise SSHException(
                'Can\'t do server-side gex with no modulus pack')
        self.transport._log(
            DEBUG,  # noqa
            'Picking p (%d <= %d <= %d bits)' % (
                minbits, preferredbits, maxbits))
        self.g, self.p = pack.get_modulus(minbits, preferredbits, maxbits)
        m = Message()
        m.add_byte(c_MSG_KEXGSS_GROUP)
        m.add_mpint(self.p)
        m.add_mpint(self.g)
        self.transport._send_message(m)
        self.transport._expect_packet(MSG_KEXGSS_INIT)

def _parse_kexgss_gex_init(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_INIT message (server mode).

        :param `Message` m: The content of the SSH2_MSG_KEXGSS_INIT message
        """
        client_token = m.get_string()
        self.e = m.get_mpint()
        if (self.e < 1) or (self.e > self.p - 1):
            raise SSHException('Client kex "e" is out of range')
        self._generate_x()
        self.f = pow(self.g, self.x, self.p)
        K = pow(self.e, self.x, self.p)
        self.transport.host_key = NullHostKey()
        key = self.transport.host_key.__str__()
        # okay, build up the hash H of
        # (V_C || V_S || I_C || I_S || K_S || min || n || max || p || g || e || f || K)  # noqa
        hm = Message()
        hm.add(self.transport.remote_version, self.transport.local_version,
               self.transport.remote_kex_init, self.transport.local_kex_init,
               key)
        hm.add_int(self.min_bits)
        hm.add_int(self.preferred_bits)
        hm.add_int(self.max_bits)
        hm.add_mpint(self.p)
        hm.add_mpint(self.g)
        hm.add_mpint(self.e)
        hm.add_mpint(self.f)
        hm.add_mpint(K)
        H = sha1(hm.asbytes()).digest()
        self.transport._set_K_H(K, H)
        srv_token = self.kexgss.ssh_accept_sec_context(self.gss_host,
                                                       client_token)
        m = Message()
        if self.kexgss._gss_srv_ctxt_status:
            mic_token = self.kexgss.ssh_get_mic(self.transport.session_id,
                                                gss_kex=True)
            m.add_byte(c_MSG_KEXGSS_COMPLETE)
            m.add_mpint(self.f)
            m.add_string(mic_token)
            if srv_token is not None:
                m.add_boolean(True)
                m.add_string(srv_token)
            else:
                m.add_boolean(False)
            self.transport._send_message(m)
            self.transport._activate_outbound()
        else:
            m.add_byte(c_MSG_KEXGSS_CONTINUE)
            m.add_string(srv_token)
            self.transport._send_message(m)
            self.transport._expect_packet(MSG_KEXGSS_CONTINUE,
                                          MSG_KEXGSS_COMPLETE,
                                          MSG_KEXGSS_ERROR)

def _parse_kexgss_complete(self, m):
        """
        Parse the SSH2_MSG_KEXGSS_COMPLETE message (client mode).

        :param `Message` m: The content of the SSH2_MSG_KEXGSS_COMPLETE message
        """
        if self.transport.host_key is None:
            self.transport.host_key = NullHostKey()
        self.f = m.get_mpint()
        mic_token = m.get_string()
        # This must be TRUE, if there is a GSS-API token in this message.
        bool = m.get_boolean()
        srv_token = None
        if bool:
            srv_token = m.get_string()
        if (self.f < 1) or (self.f > self.p - 1):
            raise SSHException('Server kex "f" is out of range')
        K = pow(self.f, self.x, self.p)
        # okay, build up the hash H of
        # (V_C || V_S || I_C || I_S || K_S || min || n || max || p || g || e || f || K)  # noqa
        hm = Message()
        hm.add(self.transport.local_version, self.transport.remote_version,
               self.transport.local_kex_init, self.transport.remote_kex_init,
               self.transport.host_key.__str__())
        if not self.old_style:
            hm.add_int(self.min_bits)
        hm.add_int(self.preferred_bits)
        if not self.old_style:
            hm.add_int(self.max_bits)
        hm.add_mpint(self.p)
        hm.add_mpint(self.g)
        hm.add_mpint(self.e)
        hm.add_mpint(self.f)
        hm.add_mpint(K)
        H = sha1(hm.asbytes()).digest()
        self.transport._set_K_H(K, H)
        if srv_token is not None:
            self.kexgss.ssh_init_sec_context(target=self.gss_host,
                                             recv_token=srv_token)
            self.kexgss.ssh_check_mic(mic_token,
                                      self.transport.session_id)
        else:
            self.kexgss.ssh_check_mic(mic_token,
                                      self.transport.session_id)
        self.transport._activate_outbound()