twisted.conch.ssh.transport : API documentation

Class	SSHCiphers	SSHCiphers represents all the encryption operations that need to occur to encrypt and authenticate the SSH connection.
Class	SSHTransportBase	Protocol supporting basic SSH functionality: sending/receiving packets and message dispatch. To connect to or run a server, you must use SSHClientTransport or SSHServerTransport.
Class	SSHServerTransport	SSHServerTransport implements the server side of the SSH protocol.
Class	SSHClientTransport	SSHClientTransport implements the client side of the SSH protocol.
Function	_getRandomNumber	Generate a random number in the range [0, 2 ** bits).
Function	_generateX	Generate a new value for the private key x.
Class	_MACParams	`_MACParams` represents the parameters necessary to compute SSH MAC (Message Authenticate Codes).
Function	_getSupportedCiphers	Build a list of ciphers that are supported by the backend in use.
Class	_NullEncryptionContext	An encryption context that does not actually encrypt anything.
Class	_DummyAlgorithm	An encryption algorithm that does not actually encrypt anything.
Class	_DummyCipher	A cipher for the none encryption method.

def _getRandomNumber(random, bits): (source)

Generate a random number in the range [0, 2 ** bits).

Parameters	random	A callable taking a count of bytes and returning that many random bytes. (type: `callable`)
	bits	The number of bits in the result. (type: `int`)
Returns	The newly generated random number. (type: `int` or `long`)
Raises	ValueError	if `bits` is not a multiple of 8.

def _generateX(random, bits): (source)

Generate a new value for the private key x.

From RFC 2631, section 2.2:

   X9.42 requires that the private key x be in the interval
   [2, (q - 2)].  x should be randomly generated in this interval.

Parameters	random	A callable taking a count of bytes and returning that many random bytes. (type: `callable`)
	bits	The size of the key to generate, in bits. (type: `int`)
Returns	A suitable 'x' value. (type: `int`)

def _getSupportedCiphers(): (source)

Build a list of ciphers that are supported by the backend in use.

Returns a list of supported ciphers. (type: list of str)

twisted.conch.ssh.transport module documentation