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# -*- test-case-name: twisted.conch.test.test_manhole -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
insults/SSH integration support.
@author: Jp Calderone
"""
from zope.interface import implementer
from twisted.conch import avatar, interfaces as iconch, error as econch
from twisted.conch.ssh import factory, session
from twisted.python import components
from twisted.conch.insults import insults
class _Glue:
"""
A feeble class for making one attribute look like another.
This should be replaced with a real class at some point, probably.
Try not to write new code that uses it.
"""
def __init__(self, **kw):
self.__dict__.update(kw)
def __getattr__(self, name):
raise AttributeError(self.name, "has no attribute", name)
class TerminalSessionTransport:
def __init__(self, proto, chainedProtocol, avatar, width, height):
self.proto = proto
self.avatar = avatar
self.chainedProtocol = chainedProtocol
protoSession = self.proto.session
self.proto.makeConnection(
_Glue(write=self.chainedProtocol.dataReceived,
loseConnection=lambda: avatar.conn.sendClose(protoSession),
name="SSH Proto Transport"))
def loseConnection():
self.proto.loseConnection()
self.chainedProtocol.makeConnection(
_Glue(write=self.proto.write,
loseConnection=loseConnection,
name="Chained Proto Transport"))
# XXX TODO
# chainedProtocol is supposed to be an ITerminalTransport,
# maybe. That means perhaps its terminalProtocol attribute is
# an ITerminalProtocol, it could be. So calling terminalSize
# on that should do the right thing But it'd be nice to clean
# this bit up.
self.chainedProtocol.terminalProtocol.terminalSize(width, height)
@implementer(iconch.ISession)
class TerminalSession(components.Adapter):
transportFactory = TerminalSessionTransport
chainedProtocolFactory = insults.ServerProtocol
def getPty(self, term, windowSize, attrs):
self.height, self.width = windowSize[:2]
def openShell(self, proto):
self.transportFactory(
proto, self.chainedProtocolFactory(),
iconch.IConchUser(self.original),
self.width, self.height)
def execCommand(self, proto, cmd):
raise econch.ConchError("Cannot execute commands")
def closed(self):
pass
class TerminalUser(avatar.ConchUser, components.Adapter):
def __init__(self, original, avatarId):
components.Adapter.__init__(self, original)
avatar.ConchUser.__init__(self)
self.channelLookup[b'session'] = session.SSHSession
class TerminalRealm:
userFactory = TerminalUser
sessionFactory = TerminalSession
transportFactory = TerminalSessionTransport
chainedProtocolFactory = insults.ServerProtocol
def _getAvatar(self, avatarId):
comp = components.Componentized()
user = self.userFactory(comp, avatarId)
sess = self.sessionFactory(comp)
sess.transportFactory = self.transportFactory
sess.chainedProtocolFactory = self.chainedProtocolFactory
comp.setComponent(iconch.IConchUser, user)
comp.setComponent(iconch.ISession, sess)
return user
def __init__(self, transportFactory=None):
if transportFactory is not None:
self.transportFactory = transportFactory
def requestAvatar(self, avatarId, mind, *interfaces):
for i in interfaces:
if i is iconch.IConchUser:
return (iconch.IConchUser,
self._getAvatar(avatarId),
lambda: None)
raise NotImplementedError()
class ConchFactory(factory.SSHFactory):
publicKeys = {}
privateKeys = {}
def __init__(self, portal):
self.portal = portal
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