Current File : //lib/python3/dist-packages/twisted/conch/manhole_ssh.py
# -*- 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 typing import Dict
from zope.interface import implementer
from twisted.conch import avatar, error as econch, interfaces as iconch
from twisted.conch.insults import insults
from twisted.conch.ssh import factory, session
from twisted.python import components
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 windowChanged(self, newWindowSize):
# ISession.windowChanged
raise NotImplementedError("Unimplemented: TerminalSession.windowChanged")
def eofReceived(self):
# ISession.eofReceived
raise NotImplementedError("Unimplemented: TerminalSession.eofReceived")
def closed(self):
# ISession.closed
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: Dict[bytes, bytes] = {}
privateKeys: Dict[bytes, bytes] = {}
def __init__(self, portal):
self.portal = portal
Mini Shell