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# -*- coding: utf-8 -*-
# manhole.py
# Copyright (C) 2014-2017 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Utilities for enabling the manhole administrative interface into Bitmask Core.
"""
PORT = 2222
def getManholeFactory(namespace, user, secret, keydir=None):
"""
Get an administrative manhole into the application.
:param namespace: the namespace to show in the manhole
:type namespace: dict
:param user: the user to authenticate into the administrative shell.
:type user: str
:param secret: pass for this manhole
:type secret: str
"""
import string
from twisted.cred import portal
from twisted.conch import manhole, manhole_ssh
from twisted.conch import recvline
from twisted.conch.insults import insults
from twisted.conch.ssh import keys
from twisted.cred.checkers import (
InMemoryUsernamePasswordDatabaseDontUse as MemoryDB)
from twisted.python import filepath
try:
from IPython.core.completer import Completer
except ImportError:
from rlcompleter import Completer
class EnhancedColoredManhole(manhole.ColoredManhole):
"""
A nicer Manhole with some autocomplete support.
See the patch in https://twistedmatrix.com/trac/ticket/6863
Since you're reading this, it'd be good if *you* can help getting that
patch into twisted :)
"""
completion = True
def handle_TAB(self):
"""
If tab completion is available and enabled then perform some tab
completion.
"""
if not self.completion:
recvline.HistoricRecvLine.handle_TAB(self)
return
# If we only have whitespace characters on this line we pass
# through the tab
if set(self.lineBuffer).issubset(string.whitespace):
recvline.HistoricRecvLine.handle_TAB(self)
return
cp = Completer(namespace=self.namespace)
cp.limit_to__all__ = False
lineLeft, lineRight = self.currentLineBuffer()
# Extract all the matches
matches = []
n = 0
while True:
match = cp.complete(lineLeft, n)
if match is None:
break
n += 1
matches.append(match)
if not matches:
return
if len(matches) == 1:
# Found the match so replace the line. This is apparently how
# we replace a line
self.handle_HOME()
self.terminal.eraseToLineEnd()
self.lineBuffer = []
self._deliverBuffer(matches[0] + lineRight)
else:
# Must have more than one match, display them
matches.sort()
self.terminal.write("\n")
self.terminal.write(" ".join(matches))
self.terminal.write("\n\n")
self.drawInputLine()
def keystrokeReceived(self, keyID, modifier):
"""
Act upon any keystroke received.
"""
self.keyHandlers.update({'\b': self.handle_BACKSPACE})
m = self.keyHandlers.get(keyID)
if m is not None:
m()
elif keyID in string.printable:
self.characterReceived(keyID, False)
class chainedProtocolFactory:
def __init__(self, namespace):
self.namespace = namespace
def __call__(self):
return insults.ServerProtocol(
EnhancedColoredManhole, self.namespace)
sshRealm = manhole_ssh.TerminalRealm()
sshRealm.chainedProtocolFactory = chainedProtocolFactory(namespace)
checker = MemoryDB(**{user: secret})
sshPortal = portal.Portal(sshRealm, [checker])
sshFactory = manhole_ssh.ConchFactory(sshPortal)
if not keydir:
from twisted.python._appdirs import getDataDirectory
keydir = getDataDirectory()
keyLocation = filepath.FilePath(keydir).child('id_rsa')
sshKey = keys._getPersistentRSAKey(keyLocation, 4096)
sshFactory.publicKeys[b"ssh-rsa"] = sshKey
sshFactory.privateKeys[b"ssh-rsa"] = sshKey
return sshFactory
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