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# Copyright (c) 2001-2004 Twisted Matrix Laboratories.
# See LICENSE for details.
#
"""
Accesses the key agent for user authentication.
This module is unstable.
Maintainer: U{Paul Swartz<mailto:z3p@twistedmatrix.com>}
"""
from twisted.conch.ssh import agent, channel
from twisted.internet import protocol
from twisted.python import log
class SSHAgentClient(agent.SSHAgentClient):
def __init__(self):
agent.SSHAgentClient.__init__(self)
self.blobs = []
def getPublicKeys(self):
return self.requestIdentities().addCallback(self._cbPublicKeys)
def _cbPublicKeys(self, blobcomm):
log.msg('got %i public keys' % len(blobcomm))
self.blobs = [x[0] for x in blobcomm]
def getPublicKey(self):
if self.blobs:
return self.blobs.pop(0)
return None
class SSHAgentForwardingChannel(channel.SSHChannel):
def channelOpen(self, specificData):
cc = protocol.ClientCreator(reactor, SSHAgentForwardingLocal)
d = cc.connectUNIX(os.environ['SSH_AUTH_SOCK'])
d.addCallback(self._cbGotLocal)
d.addErrback(lambda x:self.loseConnection())
self.buf = ''
def _cbGotLocal(self, local):
self.local = local
self.dataReceived = self.local.transport.write
self.local.dataReceived = self.write
def dataReceived(self, data):
self.buf += data
def closed(self):
if self.local:
self.local.loseConnection()
self.local = None
class SSHAgentForwardingLocal(protocol.Protocol): pass
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