twisted.conch.ssh._kex : API documentation

Function	getKex	Get a description of a named key exchange algorithm.
Function	isFixedGroup	Returns `True` if `kexAlgorithm` has a fixed prime / generator group.
Function	getHashProcessor	Get the hash algorithm callable to use in key exchange.
Function	getDHGeneratorAndPrime	Get the generator and the prime to use in key exchange.
Function	getSupportedKeyExchanges	Get a list of supported key exchange algorithm names in order of preference.
Interface	_IKexAlgorithm	An `_IKexAlgorithm` describes a key exchange algorithm.
Interface	_IFixedGroupKexAlgorithm	An `_IFixedGroupKexAlgorithm` describes a key exchange algorithm with a fixed prime / generator group.
Interface	_IGroupExchangeKexAlgorithm	An `_IGroupExchangeKexAlgorithm` describes a key exchange algorithm that uses group exchange between the client and server.
Class	_DHGroupExchangeSHA256	Diffie-Hellman Group and Key Exchange with SHA-256 as HASH. Defined in RFC 4419, 4.2.
Class	_DHGroupExchangeSHA1	Diffie-Hellman Group and Key Exchange with SHA-1 as HASH. Defined in RFC 4419, 4.1.
Class	_DHGroup1SHA1	Diffie-Hellman key exchange with SHA-1 as HASH, and Oakley Group 2 (1024-bit MODP Group). Defined in RFC 4253, 8.1.
Class	_DHGroup14SHA1	Diffie-Hellman key exchange with SHA-1 as HASH and Oakley Group 14 (2048-bit MODP Group). Defined in RFC 4253, 8.2.

def getKex(kexAlgorithm): (source)

Get a description of a named key exchange algorithm.

Parameters	kexAlgorithm	The key exchange algorithm name. (type: `str`)
Returns	A description of the key exchange algorithm named by `kexAlgorithm`. (type: `_IKexAlgorithm`)
Raises	ConchError	if the key exchange algorithm is not found.

def isFixedGroup(kexAlgorithm): (source)

Returns True if kexAlgorithm has a fixed prime / generator group.

Parameters	kexAlgorithm	The key exchange algorithm name. (type: `str`)
Returns	`True` if `kexAlgorithm` has a fixed prime / generator group, otherwise `False`. (type: `bool`)

def getHashProcessor(kexAlgorithm): (source)

Get the hash algorithm callable to use in key exchange.

Parameters	kexAlgorithm	The key exchange algorithm name. (type: `str`)
Returns	A callable hash algorithm constructor (e.g. `hashlib.sha256`). (type: `callable`)

def getDHGeneratorAndPrime(kexAlgorithm): (source)

Get the generator and the prime to use in key exchange.

Parameters	kexAlgorithm	The key exchange algorithm name. (type: `str`)
Returns	A `tuple` containing `long` generator and `long` prime. (type: `tuple`)

def getSupportedKeyExchanges(): (source)

Get a list of supported key exchange algorithm names in order of preference.

Returns A list of supported key exchange algorithm names. (type: list of str)

twisted.conch.ssh._kex module documentation