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""" TAP plugin for creating telnet- and ssh-accessible manhole servers. @author: Jp Calderone """ from zope.interface import implementer from twisted.internet import protocol from twisted.application import service, strports from twisted.cred import portal, checkers from twisted.python import usage, filepath from twisted.conch import manhole, manhole_ssh, telnet from twisted.conch.insults import insults from twisted.conch.ssh import keys class makeTelnetProtocol: def __init__(self, portal): self.portal = portal def __call__(self): auth = telnet.AuthenticatingTelnetProtocol args = (self.portal,) return telnet.TelnetTransport(auth, *args) class chainedProtocolFactory: def __init__(self, namespace): self.namespace = namespace def __call__(self): return insults.ServerProtocol(manhole.ColoredManhole, self.namespace) @implementer(portal.IRealm) class _StupidRealm: def __init__(self, proto, *a, **kw): self.protocolFactory = proto self.protocolArgs = a self.protocolKwArgs = kw def requestAvatar(self, avatarId, *interfaces): if telnet.ITelnetProtocol in interfaces: return (telnet.ITelnetProtocol, self.protocolFactory(*self.protocolArgs, **self.protocolKwArgs), lambda: None) raise NotImplementedError() class Options(usage.Options): optParameters = [ ["telnetPort", "t", None, ("strports description of the address on which to listen for telnet " "connections")], ["sshPort", "s", None, ("strports description of the address on which to listen for ssh " "connections")], ["passwd", "p", "/etc/passwd", "name of a passwd(5)-format username/password file"], ["sshKeyDir", None, "", "Directory where the autogenerated SSH key is kept."], ["sshKeyName", None, "server.key", "Filename of the autogenerated SSH key."], ["sshKeySize", None, 4096, "Size of the automatically generated SSH key."], ] def __init__(self): usage.Options.__init__(self) self['namespace'] = None def postOptions(self): if self['telnetPort'] is None and self['sshPort'] is None: raise usage.UsageError( "At least one of --telnetPort and --sshPort must be specified") def makeService(options): """ Create a manhole server service. @type options: L{dict} @param options: A mapping describing the configuration of the desired service. Recognized key/value pairs are:: "telnetPort": strports description of the address on which to listen for telnet connections. If None, no telnet service will be started. "sshPort": strports description of the address on which to listen for ssh connections. If None, no ssh service will be started. "namespace": dictionary containing desired initial locals for manhole connections. If None, an empty dictionary will be used. "passwd": Name of a passwd(5)-format username/password file. "sshKeyDir": The folder that the SSH server key will be kept in. "sshKeyName": The filename of the key. "sshKeySize": The size of the key, in bits. Default is 4096. @rtype: L{twisted.application.service.IService} @return: A manhole service. """ svc = service.MultiService() namespace = options['namespace'] if namespace is None: namespace = {} checker = checkers.FilePasswordDB(options['passwd']) if options['telnetPort']: telnetRealm = _StupidRealm(telnet.TelnetBootstrapProtocol, insults.ServerProtocol, manhole.ColoredManhole, namespace) telnetPortal = portal.Portal(telnetRealm, [checker]) telnetFactory = protocol.ServerFactory() telnetFactory.protocol = makeTelnetProtocol(telnetPortal) telnetService = strports.service(options['telnetPort'], telnetFactory) telnetService.setServiceParent(svc) if options['sshPort']: sshRealm = manhole_ssh.TerminalRealm() sshRealm.chainedProtocolFactory = chainedProtocolFactory(namespace) sshPortal = portal.Portal(sshRealm, [checker]) sshFactory = manhole_ssh.ConchFactory(sshPortal) if options['sshKeyDir'] != "": keyDir = options['sshKeyDir'] else: from twisted.python._appdirs import getDataDirectory keyDir = getDataDirectory() keyLocation = filepath.FilePath(keyDir).child(options['sshKeyName']) sshKey = keys._getPersistentRSAKey(keyLocation, int(options['sshKeySize'])) sshFactory.publicKeys[b"ssh-rsa"] = sshKey sshFactory.privateKeys[b"ssh-rsa"] = sshKey sshService = strports.service(options['sshPort'], sshFactory) sshService.setServiceParent(svc) return svc