Packetizer¶
Packet handling
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exception paramiko.packet.NeedRekeyException¶
- Exception indicating a rekey is needed. - 
__weakref__¶
- list of weak references to the object (if defined) 
 
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class paramiko.packet.Packetizer(socket)¶
- Implementation of the base SSH packet protocol. - 
__weakref__¶
- list of weak references to the object (if defined) 
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complete_handshake()¶
- Tells - Packetizerthat the handshake has completed.
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handshake_timed_out()¶
- Checks if the handshake has timed out. - If - start_handshakewasn’t called before the call to this function, the return value will always be- False. If the handshake completed before a timeout was reached, the return value will be- False- Returns: - handshake time out status, as a - bool
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need_rekey()¶
- Returns - Trueif a new set of keys needs to be negotiated. This will be triggered during a packet read or write, so it should be checked after every read or write, or at least after every few.
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read_all(n, check_rekey=False)¶
- Read as close to N bytes as possible, blocking as long as necessary. - Parameters: - n (int) – number of bytes to read - Returns: - the data read, as a - str- Raises: - EOFError– if the socket was closed before all the bytes could be read
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read_message()¶
- Only one thread should ever be in this function (no other locking is done). - Raises: - SSHException– if the packet is mangled- Raises: - NeedRekeyException– if the transport should rekey
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readline(timeout)¶
- Read a line from the socket. We assume no data is pending after the line, so it’s okay to attempt large reads. 
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send_message(data)¶
- Write a block of data using the current cipher, as an SSH block. 
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set_inbound_cipher(block_engine, block_size, mac_engine, mac_size, mac_key, etm=False)¶
- Switch inbound data cipher. :param etm: Set encrypt-then-mac from OpenSSH 
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set_keepalive(interval, callback)¶
- Turn on/off the callback keepalive. If - intervalseconds pass with no data read from or written to the socket, the callback will be executed and the timer will be reset.
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set_log(log)¶
- Set the Python log object to use for logging. 
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set_outbound_cipher(block_engine, block_size, mac_engine, mac_size, mac_key, sdctr=False, etm=False)¶
- Switch outbound data cipher. :param etm: Set encrypt-then-mac from OpenSSH 
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start_handshake(timeout)¶
- Tells - Packetizerthat the handshake process started. Starts a book keeping timer that can signal a timeout in the handshake process.- Parameters: - timeout (float) – amount of seconds to wait before timing out 
 
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