/mandos/release : revision 237.7.305

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#!/usr/bin/python

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#!/usr/bin/python2.7

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@fukt.bsnet.se>.

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# Contact the authors at <mandos@recompile.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/dev/log")))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("c")).if_nametoindex

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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return interface_index

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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def __exit__(self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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def __init__(self, value, *args, **kwargs):

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self.value = value

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

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See <http://www.dns-sd.org/ServiceTypes.html>

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See <https://www.iana.org/assignments/service-names-port-numbers>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.group = None # our entry group

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self.server = None

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self.bus = bus

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def rename(self):

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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"""Derived from the Avahi example code"""

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if self.rename_count >= self.max_renames:

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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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logger.info("Changing Zeroconf service name to %r ...",

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self.name)

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syslogger.setFormatter(logging.Formatter

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('Mandos (%s) [%%(process)d]:'

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' %%(levelname)s: %%(message)s'

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% self.name))

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException, error:

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logger.critical("DBusException: %s", error)

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

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else:

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logger.critical("D-Bus Exception", exc_info=error)

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self.cleanup()

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os._exit(1)

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def remove(self):

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"""Derived from the Avahi example code"""

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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"""Derived from the Avahi example code"""

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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"""Derived from the Avahi example code"""

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logger.debug("Avahi entry group state change: %i", state)

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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logger.critical("Avahi: Error in group state changed %s",

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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def cleanup(self):

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"""Derived from the Avahi example code"""

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if self.group is not None:

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self.group.Free()

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group = None

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def server_state_changed(self, state):

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self.remove()

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def server_state_changed(self, state, error=None):

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"""Derived from the Avahi example code"""

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logger.debug("Avahi server state change: %i", state)

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if state == avahi.SERVER_COLLISION:

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logger.error("Zeroconf server name collision")

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self.remove()

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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logger.error(bad_states[state] + ": %r", error)

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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398

self.add()

399

else:

400

if error is None:

401

logger.debug("Unknown state: %r", state)

402

else:

403

logger.debug("Unknown state: %r: %r", state, error)

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def activate(self):

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"""Derived from the Avahi example code"""

230

407

if self.server is None:

231

408

self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

410

avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

414

self.server_state_changed)

237

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self.server_state_changed(self.server.GetState())

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class AvahiServiceToSyslog(AvahiService):

419

def rename(self, *args, **kwargs):

420

"""Add the new name to the syslog messages"""

421

ret = AvahiService.rename(self, *args, **kwargs)

422

syslogger.setFormatter(logging.Formatter(

423

'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'

424

.format(self.name)))

425

return ret

426

427

def call_pipe(connection, # : multiprocessing.Connection

428

func, *args, **kwargs):

429

"""This function is meant to be called by multiprocessing.Process

430

431

This function runs func(*args, **kwargs), and writes the resulting

432

return value on the provided multiprocessing.Connection.

433

"""

434

connection.send(func(*args, **kwargs))

435

connection.close()

436

240

437

class Client(object):

241

438

"""A representation of a client host served by this server.

242

439

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440

Attributes:

244

_approved: bool(); 'None' if not yet approved/disapproved

441

approved: bool(); 'None' if not yet approved/disapproved

245

442

approval_delay: datetime.timedelta(); Time to wait for approval

246

443

approval_duration: datetime.timedelta(); Duration of one approval

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444

checker: subprocess.Popen(); a running checker process used

254

451

instance %(name)s can be used in the command.

255

452

checker_initiator_tag: a gobject event source tag, or None

256

453

created: datetime.datetime(); (UTC) object creation

454

client_structure: Object describing what attributes a client has

455

and is used for storing the client at exit

257

456

current_checker_command: string; current running checker_command

258

disable_hook: If set, called by disable() as disable_hook(self)

259

457

disable_initiator_tag: a gobject event source tag, or None

260

458

enabled: bool()

261

459

fingerprint: string (40 or 32 hexadecimal digits); used to

264

462

interval: datetime.timedelta(); How often to start a new checker

265

463

last_approval_request: datetime.datetime(); (UTC) or None

266

464

last_checked_ok: datetime.datetime(); (UTC) or None

267

last_enabled: datetime.datetime(); (UTC)

465

last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

468

last_checker_signal: The signal which killed the last checker, if

469

last_checker_status is -1

470

last_enabled: datetime.datetime(); (UTC) or None

268

471

name: string; from the config file, used in log messages and

269

472

D-Bus identifiers

270

473

secret: bytestring; sent verbatim (over TLS) to client

271

474

timeout: datetime.timedelta(); How long from last_checked_ok

272

475

until this client is disabled

476

extended_timeout: extra long timeout when secret has been sent

273

477

runtime_expansions: Allowed attributes for runtime expansion.

478

expires: datetime.datetime(); time (UTC) when a client will be

479

disabled, or None

480

server_settings: The server_settings dict from main()

274

481

"""

275

482

276

483

runtime_expansions = ("approval_delay", "approval_duration",

277

"created", "enabled", "fingerprint",

278

"host", "interval", "last_checked_ok",

484

"created", "enabled", "expires",

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"fingerprint", "host", "interval",

486

"last_approval_request", "last_checked_ok",

279

487

"last_enabled", "name", "timeout")

488

client_defaults = {

489

"timeout": "PT5M",

490

"extended_timeout": "PT15M",

491

"interval": "PT2M",

492

"checker": "fping -q -- %%(host)s",

493

"host": "",

494

"approval_delay": "PT0S",

495

"approval_duration": "PT1S",

496

"approved_by_default": "True",

497

"enabled": "True",

498

}

280

499

281

500

@staticmethod

282

def _timedelta_to_milliseconds(td):

283

"Convert a datetime.timedelta() to milliseconds"

284

return ((td.days * 24 * 60 * 60 * 1000)

285

+ (td.seconds * 1000)

286

+ (td.microseconds // 1000))

287

288

def timeout_milliseconds(self):

289

"Return the 'timeout' attribute in milliseconds"

290

return self._timedelta_to_milliseconds(self.timeout)

291

292

def interval_milliseconds(self):

293

"Return the 'interval' attribute in milliseconds"

294

return self._timedelta_to_milliseconds(self.interval)

295

296

def approval_delay_milliseconds(self):

297

return self._timedelta_to_milliseconds(self.approval_delay)

298

299

def __init__(self, name = None, disable_hook=None, config=None):

300

"""Note: the 'checker' key in 'config' sets the

301

'checker_command' attribute and *not* the 'checker'

302

attribute."""

501

def config_parser(config):

502

"""Construct a new dict of client settings of this form:

503

{ client_name: {setting_name: value, ...}, ...}

504

with exceptions for any special settings as defined above.

505

NOTE: Must be a pure function. Must return the same result

506

value given the same arguments.

507

"""

508

settings = {}

509

for client_name in config.sections():

510

section = dict(config.items(client_name))

511

client = settings[client_name] = {}

512

513

client["host"] = section["host"]

514

# Reformat values from string types to Python types

515

client["approved_by_default"] = config.getboolean(

516

client_name, "approved_by_default")

517

client["enabled"] = config.getboolean(client_name,

518

"enabled")

519

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

523

client["fingerprint"] = (section["fingerprint"].upper()

524

.replace(" ", ""))

525

if "secret" in section:

526

client["secret"] = section["secret"].decode("base64")

527

elif "secfile" in section:

528

with open(os.path.expanduser(os.path.expandvars

529

(section["secfile"])),

530

"rb") as secfile:

531

client["secret"] = secfile.read()

532

else:

533

raise TypeError("No secret or secfile for section {}"

534

.format(section))

535

client["timeout"] = string_to_delta(section["timeout"])

536

client["extended_timeout"] = string_to_delta(

537

section["extended_timeout"])

538

client["interval"] = string_to_delta(section["interval"])

539

client["approval_delay"] = string_to_delta(

540

section["approval_delay"])

541

client["approval_duration"] = string_to_delta(

542

section["approval_duration"])

543

client["checker_command"] = section["checker"]

544

client["last_approval_request"] = None

545

client["last_checked_ok"] = None

546

client["last_checker_status"] = -2

547

548

return settings

549

550

def __init__(self, settings, name = None, server_settings=None):

303

551

self.name = name

304

if config is None:

305

config = {}

552

if server_settings is None:

553

server_settings = {}

554

self.server_settings = server_settings

555

# adding all client settings

556

for setting, value in settings.items():

557

setattr(self, setting, value)

558

559

if self.enabled:

560

if not hasattr(self, "last_enabled"):

561

self.last_enabled = datetime.datetime.utcnow()

562

if not hasattr(self, "expires"):

563

self.expires = (datetime.datetime.utcnow()

564

+ self.timeout)

565

else:

566

self.last_enabled = None

567

self.expires = None

568

306

569

logger.debug("Creating client %r", self.name)

307

# Uppercase and remove spaces from fingerprint for later

308

# comparison purposes with return value from the fingerprint()

309

# function

310

self.fingerprint = (config["fingerprint"].upper()

311

.replace(" ", ""))

312

570

logger.debug(" Fingerprint: %s", self.fingerprint)

313

if "secret" in config:

314

self.secret = config["secret"].decode("base64")

315

elif "secfile" in config:

316

with open(os.path.expanduser(os.path.expandvars

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

raise TypeError("No secret or secfile for client %s"

322

% self.name)

323

self.host = config.get("host", "")

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

327

self.last_enabled = None

328

self.last_checked_ok = None

329

self.timeout = string_to_delta(config["timeout"])

330

self.interval = string_to_delta(config["interval"])

331

self.disable_hook = disable_hook

571

self.created = settings.get("created",

572

datetime.datetime.utcnow())

573

574

# attributes specific for this server instance

332

575

self.checker = None

333

576

self.checker_initiator_tag = None

334

577

self.disable_initiator_tag = None

335

578

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

337

579

self.current_checker_command = None

338

self.last_connect = None

339

self._approved = None

340

self.approved_by_default = config.get("approved_by_default",

341

True)

580

self.approved = None

342

581

self.approvals_pending = 0

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

586

if not attr.startswith("_")]

587

self.client_structure.append("client_structure")

588

589

for name, t in inspect.getmembers(

590

type(self), lambda obj: isinstance(obj, property)):

591

if not name.startswith("_"):

592

self.client_structure.append(name)

348

593

594

# Send notice to process children that client state has changed

349

595

def send_changedstate(self):

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

596

with self.changedstate:

597

self.changedstate.notify_all()

598

354

599

def enable(self):

355

600

"""Start this client's checker and timeout hooks"""

356

601

if getattr(self, "enabled", False):

357

602

# Already enabled

358

603

return

359

self.send_changedstate()

604

self.expires = datetime.datetime.utcnow() + self.timeout

605

self.enabled = True

360

606

self.last_enabled = datetime.datetime.utcnow()

361

# Schedule a new checker to be started an 'interval' from now,

362

# and every interval from then on.

363

self.checker_initiator_tag = (gobject.timeout_add

364

(self.interval_milliseconds(),

365

self.start_checker))

366

# Schedule a disable() when 'timeout' has passed

367

self.disable_initiator_tag = (gobject.timeout_add

368

(self.timeout_milliseconds(),

369

self.disable))

370

self.enabled = True

371

# Also start a new checker *right now*.

372

self.start_checker()

607

self.init_checker()

608

self.send_changedstate()

373

609

374

610

def disable(self, quiet=True):

375

611

"""Disable this client."""

376

612

if not getattr(self, "enabled", False):

377

613

return False

378

614

if not quiet:

379

self.send_changedstate()

380

if not quiet:

381

615

logger.info("Disabling client %s", self.name)

382

if getattr(self, "disable_initiator_tag", False):

616

if getattr(self, "disable_initiator_tag", None) is not None:

383

617

gobject.source_remove(self.disable_initiator_tag)

384

618

self.disable_initiator_tag = None

385

if getattr(self, "checker_initiator_tag", False):

619

self.expires = None

620

if getattr(self, "checker_initiator_tag", None) is not None:

386

621

gobject.source_remove(self.checker_initiator_tag)

387

622

self.checker_initiator_tag = None

388

623

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

391

624

self.enabled = False

625

if not quiet:

626

self.send_changedstate()

392

627

# Do not run this again if called by a gobject.timeout_add

393

628

return False

394

629

395

630

def __del__(self):

396

self.disable_hook = None

397

631

self.disable()

398

632

399

def checker_callback(self, pid, condition, command):

633

def init_checker(self):

634

# Schedule a new checker to be started an 'interval' from now,

635

# and every interval from then on.

636

if self.checker_initiator_tag is not None:

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

int(self.interval.total_seconds() * 1000),

640

self.start_checker)

641

# Schedule a disable() when 'timeout' has passed

642

if self.disable_initiator_tag is not None:

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

int(self.timeout.total_seconds() * 1000), self.disable)

646

# Also start a new checker *right now*.

647

self.start_checker()

648

649

def checker_callback(self, source, condition, connection,

650

command):

400

651

"""The checker has completed, so take appropriate actions."""

401

652

self.checker_callback_tag = None

402

653

self.checker = None

403

if os.WIFEXITED(condition):

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

661

if self.last_checker_status == 0:

406

662

logger.info("Checker for %(name)s succeeded",

407

663

vars(self))

408

664

self.checked_ok()

409

665

else:

410

logger.info("Checker for %(name)s failed",

411

vars(self))

666

logger.info("Checker for %(name)s failed", vars(self))

412

667

else:

668

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

413

670

logger.warning("Checker for %(name)s crashed?",

414

671

vars(self))

672

return False

415

673

416

674

def checked_ok(self):

417

"""Bump up the timeout for this client.

418

419

This should only be called when the client has been seen,

420

alive and well.

421

"""

675

"""Assert that the client has been seen, alive and well."""

422

676

self.last_checked_ok = datetime.datetime.utcnow()

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

677

self.last_checker_status = 0

678

self.last_checker_signal = None

679

self.bump_timeout()

680

681

def bump_timeout(self, timeout=None):

682

"""Bump up the timeout for this client."""

683

if timeout is None:

684

timeout = self.timeout

685

if self.disable_initiator_tag is not None:

686

gobject.source_remove(self.disable_initiator_tag)

687

self.disable_initiator_tag = None

688

if getattr(self, "enabled", False):

689

self.disable_initiator_tag = gobject.timeout_add(

690

int(timeout.total_seconds() * 1000), self.disable)

691

self.expires = datetime.datetime.utcnow() + timeout

427

692

428

693

def need_approval(self):

429

694

self.last_approval_request = datetime.datetime.utcnow()

434

699

If a checker already exists, leave it running and do

435

700

nothing."""

436

701

# The reason for not killing a running checker is that if we

437

# did that, then if a checker (for some reason) started

438

# running slowly and taking more than 'interval' time, the

439

# client would inevitably timeout, since no checker would get

440

# a chance to run to completion. If we instead leave running

702

# did that, and if a checker (for some reason) started running

703

# slowly and taking more than 'interval' time, then the client

704

# would inevitably timeout, since no checker would get a

705

# chance to run to completion. If we instead leave running

441

706

# checkers alone, the checker would have to take more time

442

707

# than 'timeout' for the client to be disabled, which is as it

443

708

# should be.

444

709

445

# If a checker exists, make sure it is not a zombie

446

try:

447

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

452

else:

453

if pid:

454

logger.warning("Checker was a zombie")

455

gobject.source_remove(self.checker_callback_tag)

456

self.checker_callback(pid, status,

457

self.current_checker_command)

710

if self.checker is not None and not self.checker.is_alive():

711

logger.warning("Checker was not alive; joining")

712

self.checker.join()

713

self.checker = None

458

714

# Start a new checker if needed

459

715

if self.checker is None:

716

# Escape attributes for the shell

717

escaped_attrs = {

718

attr: re.escape(str(getattr(self, attr)))

719

for attr in self.runtime_expansions }

460

720

try:

461

# In case checker_command has exactly one % operator

462

command = self.checker_command % self.host

463

except TypeError:

464

# Escape attributes for the shell

465

escaped_attrs = dict(

466

(attr,

467

re.escape(unicode(str(getattr(self, attr, "")),

468

errors=

469

'replace')))

470

for attr in

471

self.runtime_expansions)

472

473

try:

474

command = self.checker_command % escaped_attrs

475

except TypeError, error:

476

logger.error('Could not format string "%s":'

477

' %s', self.checker_command, error)

478

return True # Try again later

721

command = self.checker_command % escaped_attrs

722

except TypeError as error:

723

logger.error('Could not format string "%s"',

724

self.checker_command,

725

exc_info=error)

726

return True # Try again later

479

727

self.current_checker_command = command

480

try:

481

logger.info("Starting checker %r for %s",

482

command, self.name)

483

# We don't need to redirect stdout and stderr, since

484

# in normal mode, that is already done by daemon(),

485

# and in debug mode we don't want to. (Stdin is

486

# always replaced by /dev/null.)

487

self.checker = subprocess.Popen(command,

488

close_fds=True,

489

shell=True, cwd="/")

490

self.checker_callback_tag = (gobject.child_watch_add

491

(self.checker.pid,

492

self.checker_callback,

493

data=command))

494

# The checker may have completed before the gobject

495

# watch was added. Check for this.

496

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

497

if pid:

498

gobject.source_remove(self.checker_callback_tag)

499

self.checker_callback(pid, status, command)

500

except OSError, error:

501

logger.error("Failed to start subprocess: %s",

502

error)

728

logger.info("Starting checker %r for %s", command,

729

self.name)

730

# We don't need to redirect stdout and stderr, since

731

# in normal mode, that is already done by daemon(),

732

# and in debug mode we don't want to. (Stdin is

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

args = (pipe[1], subprocess.call, command),

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

pipe[0].fileno(), gobject.IO_IN,

752

self.checker_callback, pipe[0], command)

503

753

# Re-run this periodically if run by gobject.timeout_add

504

754

return True

505

755

511

761

if getattr(self, "checker", None) is None:

512

762

return

513

763

logger.debug("Stopping checker for %(name)s", vars(self))

514

try:

515

os.kill(self.checker.pid, signal.SIGTERM)

516

#time.sleep(0.5)

517

#if self.checker.poll() is None:

518

# os.kill(self.checker.pid, signal.SIGKILL)

519

except OSError, error:

520

if error.errno != errno.ESRCH: # No such process

521

raise

764

self.checker.terminate()

522

765

self.checker = None

523

766

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

767

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

526

772

"""Decorators for marking methods of a DBusObjectWithProperties to

527

773

become properties on the D-Bus.

528

774

537

783

# "Set" method, so we fail early here:

538

784

if byte_arrays and signature != "ay":

539

785

raise ValueError("Byte arrays not supported for non-'ay'"

540

" signature %r" % signature)

786

" signature {!r}".format(signature))

787

541

788

def decorator(func):

542

789

func._dbus_is_property = True

543

790

func._dbus_interface = dbus_interface

548

795

func._dbus_name = func._dbus_name[:-14]

549

796

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

550

797

return func

798

799

return decorator

800

801

802

def dbus_interface_annotations(dbus_interface):

803

"""Decorator for marking functions returning interface annotations

804

805

Usage:

806

807

@dbus_interface_annotations("org.example.Interface")

808

def _foo(self): # Function name does not matter

809

return {"org.freedesktop.DBus.Deprecated": "true",

810

"org.freedesktop.DBus.Property.EmitsChangedSignal":

811

"false"}

812

"""

813

814

def decorator(func):

815

func._dbus_is_interface = True

816

func._dbus_interface = dbus_interface

817

func._dbus_name = dbus_interface

818

return func

819

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

"""Decorator to annotate D-Bus methods, signals or properties

825

Usage:

826

827

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

828

"org.freedesktop.DBus.Property."

829

"EmitsChangedSignal": "false"})

830

@dbus_service_property("org.example.Interface", signature="b",

831

access="r")

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

836

def decorator(func):

837

func._dbus_annotations = annotations

838

return func

839

551

840

return decorator

552

841

553

842

554

843

class DBusPropertyException(dbus.exceptions.DBusException):

555

844

"""A base class for D-Bus property-related exceptions

556

845

"""

557

def __unicode__(self):

558

return unicode(str(self))

846

pass

559

847

560

848

561

849

class DBusPropertyAccessException(DBusPropertyException):

572

860

573

861

class DBusObjectWithProperties(dbus.service.Object):

574

862

"""A D-Bus object with properties.

575

863

576

864

Classes inheriting from this can use the dbus_service_property

577

865

decorator to expose methods as D-Bus properties. It exposes the

578

866

standard Get(), Set(), and GetAll() methods on the D-Bus.

579

867

"""

580

868

581

869

@staticmethod

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

870

def _is_dbus_thing(thing):

871

"""Returns a function testing if an attribute is a D-Bus thing

872

873

If called like _is_dbus_thing("method") it returns a function

874

suitable for use as predicate to inspect.getmembers().

875

"""

876

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

877

False)

584

878

585

def _get_all_dbus_properties(self):

879

def _get_all_dbus_things(self, thing):

586

880

"""Returns a generator of (name, attribute) pairs

587

881

"""

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

882

return ((getattr(athing.__get__(self), "_dbus_name", name),

883

athing.__get__(self))

884

for cls in self.__class__.__mro__

885

for name, athing in

886

inspect.getmembers(cls, self._is_dbus_thing(thing)))

591

887

592

888

def _get_dbus_property(self, interface_name, property_name):

593

889

"""Returns a bound method if one exists which is a D-Bus

594

890

property with the specified name and interface.

595

891

"""

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

cls, self._is_dbus_thing("property")):

895

if (value._dbus_name == property_name

896

and value._dbus_interface == interface_name):

897

return value.__get__(self)

898

606

899

# No such property

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

900

raise DBusPropertyNotFound("{}:{}.{}".format(

901

self.dbus_object_path, interface_name, property_name))

610

902

611

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

612

905

out_signature="v")

613

906

def Get(self, interface_name, property_name):

614

907

"""Standard D-Bus property Get() method, see D-Bus standard.

632

925

# The byte_arrays option is not supported yet on

633

926

# signatures other than "ay".

634

927

if prop._dbus_signature != "ay":

635

raise ValueError

636

value = dbus.ByteArray(''.join(unichr(byte)

637

for byte in value))

928

raise ValueError("Byte arrays not supported for non-"

929

"'ay' signature {!r}"

930

.format(prop._dbus_signature))

931

value = dbus.ByteArray(b''.join(chr(byte)

932

for byte in value))

638

933

prop(value)

639

934

640

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

641

937

out_signature="a{sv}")

642

938

def GetAll(self, interface_name):

643

939

"""Standard D-Bus property GetAll() method, see D-Bus

644

940

standard.

645

941

646

942

Note: Will not include properties with access="write".

647

943

"""

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

944

properties = {}

945

for name, prop in self._get_all_dbus_things("property"):

650

946

if (interface_name

651

947

and interface_name != prop._dbus_interface):

652

948

# Interface non-empty but did not match

656

952

continue

657

953

value = prop()

658

954

if not hasattr(value, "variant_level"):

659

all[name] = value

955

properties[name] = value

660

956

continue

661

all[name] = type(value)(value, variant_level=

662

value.variant_level+1)

663

return dbus.Dictionary(all, signature="sv")

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

959

return dbus.Dictionary(properties, signature="sv")

960

961

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

962

def PropertiesChanged(self, interface_name, changed_properties,

963

invalidated_properties):

964

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

965

standard.

966

"""

967

pass

664

968

665

969

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

666

970

out_signature="s",

667

971

path_keyword='object_path',

668

972

connection_keyword='connection')

669

973

def Introspect(self, object_path, connection):

670

"""Standard D-Bus method, overloaded to insert property tags.

974

"""Overloading of standard D-Bus method.

975

976

Inserts property tags and interface annotation tags.

671

977

"""

672

978

xmlstring = dbus.service.Object.Introspect(self, object_path,

673

979

connection)

674

980

try:

675

981

document = xml.dom.minidom.parseString(xmlstring)

982

676

983

def make_tag(document, name, prop):

677

984

e = document.createElement("property")

678

985

e.setAttribute("name", name)

679

986

e.setAttribute("type", prop._dbus_signature)

680

987

e.setAttribute("access", prop._dbus_access)

681

988

return e

989

682

990

for if_tag in document.getElementsByTagName("interface"):

991

# Add property tags

683

992

for tag in (make_tag(document, name, prop)

684

993

for name, prop

685

in self._get_all_dbus_properties()

994

in self._get_all_dbus_things("property")

686

995

if prop._dbus_interface

687

996

== if_tag.getAttribute("name")):

688

997

if_tag.appendChild(tag)

998

# Add annotation tags

999

for typ in ("method", "signal", "property"):

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

if (name == tag.getAttribute("name")

1005

and prop._dbus_interface

1006

== if_tag.getAttribute("name")):

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1021

if name == if_tag.getAttribute("name")

1022

)).items():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

689

1027

# Add the names to the return values for the

690

1028

# "org.freedesktop.DBus.Properties" methods

691

1029

if (if_tag.getAttribute("name")

704

1042

xmlstring = document.toxml("utf-8")

705

1043

document.unlink()

706

1044

except (AttributeError, xml.dom.DOMException,

707

xml.parsers.expat.ExpatError), error:

1045

xml.parsers.expat.ExpatError) as error:

708

1046

logger.error("Failed to override Introspection method",

709

error)

1047

exc_info=error)

710

1048

return xmlstring

711

1049

712

1050

1051

def datetime_to_dbus(dt, variant_level=0):

1052

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1053

if dt is None:

1054

return dbus.String("", variant_level = variant_level)

1055

return dbus.String(dt.isoformat(), variant_level=variant_level)

1056

1057

1058

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

"""A class decorator; applied to a subclass of

1060

dbus.service.Object, it will add alternate D-Bus attributes with

1061

interface names according to the "alt_interface_names" mapping.

1062

Usage:

1063

1064

@alternate_dbus_interfaces({"org.example.Interface":

1065

"net.example.AlternateInterface"})

1066

class SampleDBusObject(dbus.service.Object):

1067

@dbus.service.method("org.example.Interface")

1068

def SampleDBusMethod():

1069

pass

1070

1071

The above "SampleDBusMethod" on "SampleDBusObject" will be

1072

reachable via two interfaces: "org.example.Interface" and

1073

"net.example.AlternateInterface", the latter of which will have

1074

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1075

"true", unless "deprecate" is passed with a False value.

1076

1077

This works for methods and signals, and also for D-Bus properties

1078

(from DBusObjectWithProperties) and interfaces (from the

1079

dbus_interface_annotations decorator).

1080

"""

1081

1082

def wrapper(cls):

1083

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1085

attr = {}

1086

interface_names = set()

1087

# Go though all attributes of the class

1088

for attrname, attribute in inspect.getmembers(cls):

1089

# Ignore non-D-Bus attributes, and D-Bus attributes

1090

# with the wrong interface name

1091

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1094

continue

1095

# Create an alternate D-Bus interface name based on

1096

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1099

interface_names.add(alt_interface)

1100

# Is this a D-Bus signal?

1101

if getattr(attribute, "_dbus_is_signal", False):

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1106

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1111

# Create a new, but exactly alike, function

1112

# object, and decorate it to be a new D-Bus signal

1113

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1131

# Copy annotations, if any

1132

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1135

except AttributeError:

1136

pass

1137

# Define a creator of a function to call both the

1138

# original and alternate functions, so both the

1139

# original and alternate signals gets sent when

1140

# the function is called

1141

def fixscope(func1, func2):

1142

"""This function is a scope container to pass

1143

func1 and func2 to the "call_both" function

1144

outside of its arguments"""

1145

1146

def call_both(*args, **kwargs):

1147

"""This function will emit two D-Bus

1148

signals by calling func1 and func2"""

1149

func1(*args, **kwargs)

1150

func2(*args, **kwargs)

1151

1152

return call_both

1153

# Create the "call_both" function and add it to

1154

# the class

1155

attr[attrname] = fixscope(attribute, new_function)

1156

# Is this a D-Bus method?

1157

elif getattr(attribute, "_dbus_is_method", False):

1158

# Create a new, but exactly alike, function

1159

# object. Decorate it to be a new D-Bus method

1160

# with the alternate D-Bus interface name. Add it

1161

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1172

# Copy annotations, if any

1173

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1176

except AttributeError:

1177

pass

1178

# Is this a D-Bus property?

1179

elif getattr(attribute, "_dbus_is_property", False):

1180

# Create a new, but exactly alike, function

1181

# object, and decorate it to be a new D-Bus

1182

# property with the alternate D-Bus interface

1183

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1195

# Copy annotations, if any

1196

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1199

except AttributeError:

1200

pass

1201

# Is this a D-Bus interface?

1202

elif getattr(attribute, "_dbus_is_interface", False):

1203

# Create a new, but exactly alike, function

1204

# object. Decorate it to be a new D-Bus interface

1205

# with the alternate D-Bus interface name. Add it

1206

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1214

if deprecate:

1215

# Deprecate all alternate interfaces

1216

iname="_AlternateDBusNames_interface_annotation{}"

1217

for interface_name in interface_names:

1218

1219

@dbus_interface_annotations(interface_name)

1220

def func(self):

1221

return { "org.freedesktop.DBus.Deprecated":

1222

"true" }

1223

# Find an unused name

1224

for aname in (iname.format(i)

1225

for i in itertools.count()):

1226

if aname not in attr:

1227

attr[aname] = func

1228

break

1229

if interface_names:

1230

# Replace the class with a new subclass of it with

1231

# methods, signals, etc. as created above.

1232

cls = type(b"{}Alternate".format(cls.__name__),

1233

(cls, ), attr)

1234

return cls

1235

1236

return wrapper

1237

1238

1239

@alternate_dbus_interfaces({"se.recompile.Mandos":

1240

"se.bsnet.fukt.Mandos"})

713

1241

class ClientDBus(Client, DBusObjectWithProperties):

714

1242

"""A Client class using D-Bus

715

1243

719

1247

"""

720

1248

721

1249

runtime_expansions = (Client.runtime_expansions

722

+ ("dbus_object_path",))

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

723

1253

724

1254

# dbus.service.Object doesn't use super(), so we can't either.

725

1255

726

1256

def __init__(self, bus = None, *args, **kwargs):

727

self._approvals_pending = 0

728

1257

self.bus = bus

729

1258

Client.__init__(self, *args, **kwargs)

730

1259

# Only now, when this client is initialized, can it show up on

731

1260

# the D-Bus

732

client_object_name = unicode(self.name).translate(

1261

client_object_name = str(self.name).translate(

733

1262

{ord("."): ord("_"),

734

1263

ord("-"): ord("_")})

735

self.dbus_object_path = (dbus.ObjectPath

736

("/clients/" + client_object_name))

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

737

1266

DBusObjectWithProperties.__init__(self, self.bus,

738

1267

self.dbus_object_path)

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

dbus_bool = dbus.Boolean(bval, variant_level=1)

749

self.PropertyChanged(dbus.String("ApprovalPending"),

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

"""Convert a UTC datetime.datetime() to a D-Bus type."""

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

oldstate = getattr(self, "enabled", False)

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

self.PropertyChanged(dbus.String("Enabled"),

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

oldstate = getattr(self, "enabled", False)

777

r = Client.disable(self, quiet=quiet)

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

self.PropertyChanged(dbus.String("Enabled"),

781

dbus.Boolean(False, variant_level=1))

782

return r

1268

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1274

""" Modify a variable so that it's a property which announces

1275

its changes to DBus.

1276

1277

transform_fun: Function that takes a value and a variant_level

1278

and transforms it to a D-Bus type.

1279

dbus_name: D-Bus name of the variable

1280

type_func: Function that transform the value before sending it

1281

to the D-Bus. Default: no transform

1282

variant_level: D-Bus variant level. Default: 1

1283

"""

1284

attrname = "_{}".format(dbus_name)

1285

1286

def setter(self, value):

1287

if hasattr(self, "dbus_object_path"):

1288

if (not hasattr(self, attrname) or

1289

type_func(getattr(self, attrname, None))

1290

!= type_func(value)):

1291

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1295

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1299

self.PropertyChanged(dbus.String(dbus_name),

1300

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

dbus.Dictionary({ dbus.String(dbus_name):

1304

dbus_value }),

1305

dbus.Array())

1306

setattr(self, attrname, value)

1307

1308

return property(lambda self: getattr(self, attrname), setter)

1309

1310

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1311

approvals_pending = notifychangeproperty(dbus.Boolean,

1312

"ApprovalPending",

1313

type_func = bool)

1314

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

"LastCheckedOK")

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1323

"LastCheckerStatus")

1324

last_approval_request = notifychangeproperty(

1325

datetime_to_dbus, "LastApprovalRequest")

1326

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

type_func = lambda td: td.total_seconds() * 1000)

1331

approval_duration = notifychangeproperty(

1332

dbus.UInt64, "ApprovalDuration",

1333

type_func = lambda td: td.total_seconds() * 1000)

1334

host = notifychangeproperty(dbus.String, "Host")

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

type_func = lambda td: td.total_seconds() * 1000)

1338

extended_timeout = notifychangeproperty(

1339

dbus.UInt64, "ExtendedTimeout",

1340

type_func = lambda td: td.total_seconds() * 1000)

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

type_func = lambda td: td.total_seconds() * 1000)

1344

checker_command = notifychangeproperty(dbus.String, "Checker")

1345

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1346

invalidate_only=True)

1347

1348

del notifychangeproperty

783

1349

784

1350

def __del__(self, *args, **kwargs):

785

1351

try:

790

1356

DBusObjectWithProperties.__del__(self, *args, **kwargs)

791

1357

Client.__del__(self, *args, **kwargs)

792

1358

793

def checker_callback(self, pid, condition, command,

794

*args, **kwargs):

795

self.checker_callback_tag = None

796

self.checker = None

797

# Emit D-Bus signal

798

self.PropertyChanged(dbus.String("CheckerRunning"),

799

dbus.Boolean(False, variant_level=1))

800

if os.WIFEXITED(condition):

801

exitstatus = os.WEXITSTATUS(condition)

1359

def checker_callback(self, source, condition,

1360

connection, command, *args, **kwargs):

1361

ret = Client.checker_callback(self, source, condition,

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

802

1366

# Emit D-Bus signal

803

1367

self.CheckerCompleted(dbus.Int16(exitstatus),

804

dbus.Int64(condition),

1368

dbus.Int64(0),

805

1369

dbus.String(command))

806

1370

else:

807

1371

# Emit D-Bus signal

808

1372

self.CheckerCompleted(dbus.Int16(-1),

809

dbus.Int64(condition),

1373

dbus.Int64(

1374

self.last_checker_signal),

810

1375

dbus.String(command))

811

812

return Client.checker_callback(self, pid, condition, command,

813

*args, **kwargs)

814

815

def checked_ok(self, *args, **kwargs):

816

r = Client.checked_ok(self, *args, **kwargs)

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

def need_approval(self, *args, **kwargs):

825

r = Client.need_approval(self, *args, **kwargs)

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

1376

return ret

832

1377

833

1378

def start_checker(self, *args, **kwargs):

834

old_checker = self.checker

835

if self.checker is not None:

836

old_checker_pid = self.checker.pid

837

else:

838

old_checker_pid = None

1379

old_checker_pid = getattr(self.checker, "pid", None)

839

1380

r = Client.start_checker(self, *args, **kwargs)

840

1381

# Only if new checker process was started

841

1382

if (self.checker is not None

842

1383

and old_checker_pid != self.checker.pid):

843

1384

# Emit D-Bus signal

844

1385

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

848

1386

return r

849

1387

850

def stop_checker(self, *args, **kwargs):

851

old_checker = getattr(self, "checker", None)

852

r = Client.stop_checker(self, *args, **kwargs)

853

if (old_checker is not None

854

and getattr(self, "checker", None) is None):

855

self.PropertyChanged(dbus.String("CheckerRunning"),

856

dbus.Boolean(False, variant_level=1))

857

return r

858

859

1388

def _reset_approved(self):

860

self._approved = None

1389

self.approved = None

861

1390

return False

862

1391

863

1392

def approve(self, value=True):

1393

self.approved = value

1394

gobject.timeout_add(int(self.approval_duration.total_seconds()

1395

* 1000), self._reset_approved)

864

1396

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

870

1397

871

1398

## D-Bus methods, signals & properties

872

_interface = "se.bsnet.fukt.Mandos.Client"

1399

1400

## Interfaces

873

1401

874

1402

## Signals

875

1403

886

1414

pass

887

1415

888

1416

# PropertyChanged - signal

1417

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

889

1418

@dbus.service.signal(_interface, signature="sv")

890

1419

def PropertyChanged(self, property, value):

891

1420

"D-Bus signal"

922

1451

# CheckedOK - method

923

1452

@dbus.service.method(_interface)

924

1453

def CheckedOK(self):

925

return self.checked_ok()

1454

self.checked_ok()

926

1455

927

1456

# Enable - method

928

1457

@dbus.service.method(_interface)

955

1484

return dbus.Boolean(bool(self.approvals_pending))

956

1485

957

1486

# ApprovedByDefault - property

958

@dbus_service_property(_interface, signature="b",

1487

@dbus_service_property(_interface,

1488

signature="b",

959

1489

access="readwrite")

960

1490

def ApprovedByDefault_dbus_property(self, value=None):

961

1491

if value is None: # get

962

1492

return dbus.Boolean(self.approved_by_default)

963

1493

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

self.PropertyChanged(dbus.String("ApprovedByDefault"),

966

dbus.Boolean(value, variant_level=1))

967

1494

968

1495

# ApprovalDelay - property

969

@dbus_service_property(_interface, signature="t",

1496

@dbus_service_property(_interface,

1497

signature="t",

970

1498

access="readwrite")

971

1499

def ApprovalDelay_dbus_property(self, value=None):

972

1500

if value is None: # get

973

return dbus.UInt64(self.approval_delay_milliseconds())

1501

return dbus.UInt64(self.approval_delay.total_seconds()

1502

* 1000)

974

1503

self.approval_delay = datetime.timedelta(0, 0, 0, value)

975

# Emit D-Bus signal

976

self.PropertyChanged(dbus.String("ApprovalDelay"),

977

dbus.UInt64(value, variant_level=1))

978

1504

979

1505

# ApprovalDuration - property

980

@dbus_service_property(_interface, signature="t",

1506

@dbus_service_property(_interface,

1507

signature="t",

981

1508

access="readwrite")

982

1509

def ApprovalDuration_dbus_property(self, value=None):

983

1510

if value is None: # get

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

1511

return dbus.UInt64(self.approval_duration.total_seconds()

1512

* 1000)

986

1513

self.approval_duration = datetime.timedelta(0, 0, 0, value)

987

# Emit D-Bus signal

988

self.PropertyChanged(dbus.String("ApprovalDuration"),

989

dbus.UInt64(value, variant_level=1))

990

1514

991

1515

# Name - property

992

1516

@dbus_service_property(_interface, signature="s", access="read")

999

1523

return dbus.String(self.fingerprint)

1000

1524

1001

1525

# Host - property

1002

@dbus_service_property(_interface, signature="s",

1526

@dbus_service_property(_interface,

1527

signature="s",

1003

1528

access="readwrite")

1004

1529

def Host_dbus_property(self, value=None):

1005

1530

if value is None: # get

1006

1531

return dbus.String(self.host)

1007

self.host = value

1008

# Emit D-Bus signal

1009

self.PropertyChanged(dbus.String("Host"),

1010

dbus.String(value, variant_level=1))

1532

self.host = str(value)

1011

1533

1012

1534

# Created - property

1013

1535

@dbus_service_property(_interface, signature="s", access="read")

1014

1536

def Created_dbus_property(self):

1015

return dbus.String(self._datetime_to_dbus(self.created))

1537

return datetime_to_dbus(self.created)

1016

1538

1017

1539

# LastEnabled - property

1018

1540

@dbus_service_property(_interface, signature="s", access="read")

1019

1541

def LastEnabled_dbus_property(self):

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1542

return datetime_to_dbus(self.last_enabled)

1023

1543

1024

1544

# Enabled - property

1025

@dbus_service_property(_interface, signature="b",

1545

@dbus_service_property(_interface,

1546

signature="b",

1026

1547

access="readwrite")

1027

1548

def Enabled_dbus_property(self, value=None):

1028

1549

if value is None: # get

1033

1554

self.disable()

1034

1555

1035

1556

# LastCheckedOK - property

1036

@dbus_service_property(_interface, signature="s",

1557

@dbus_service_property(_interface,

1558

signature="s",

1037

1559

access="readwrite")

1038

1560

def LastCheckedOK_dbus_property(self, value=None):

1039

1561

if value is not None:

1040

1562

self.checked_ok()

1041

1563

return

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1564

return datetime_to_dbus(self.last_checked_ok)

1565

1566

# LastCheckerStatus - property

1567

@dbus_service_property(_interface, signature="n", access="read")

1568

def LastCheckerStatus_dbus_property(self):

1569

return dbus.Int16(self.last_checker_status)

1570

1571

# Expires - property

1572

@dbus_service_property(_interface, signature="s", access="read")

1573

def Expires_dbus_property(self):

1574

return datetime_to_dbus(self.expires)

1046

1575

1047

1576

# LastApprovalRequest - property

1048

1577

@dbus_service_property(_interface, signature="s", access="read")

1049

1578

def LastApprovalRequest_dbus_property(self):

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1579

return datetime_to_dbus(self.last_approval_request)

1055

1580

1056

1581

# Timeout - property

1057

@dbus_service_property(_interface, signature="t",

1582

@dbus_service_property(_interface,

1583

signature="t",

1058

1584

access="readwrite")

1059

1585

def Timeout_dbus_property(self, value=None):

1060

1586

if value is None: # get

1061

return dbus.UInt64(self.timeout_milliseconds())

1587

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1588

old_timeout = self.timeout

1062

1589

self.timeout = datetime.timedelta(0, 0, 0, value)

1063

# Emit D-Bus signal

1064

self.PropertyChanged(dbus.String("Timeout"),

1065

dbus.UInt64(value, variant_level=1))

1066

if getattr(self, "disable_initiator_tag", None) is None:

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

1590

# Reschedule disabling

1591

if self.enabled:

1592

now = datetime.datetime.utcnow()

1593

self.expires += self.timeout - old_timeout

1594

if self.expires <= now:

1595

# The timeout has passed

1596

self.disable()

1597

else:

1598

if (getattr(self, "disable_initiator_tag", None)

1599

is None):

1600

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

int((self.expires - now).total_seconds() * 1000),

1604

self.disable)

1605

1606

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1609

access="readwrite")

1610

def ExtendedTimeout_dbus_property(self, value=None):

1611

if value is None: # get

1612

return dbus.UInt64(self.extended_timeout.total_seconds()

1613

* 1000)

1614

self.extended_timeout = datetime.timedelta(0, 0, 0, value)

1083

1615

1084

1616

# Interval - property

1085

@dbus_service_property(_interface, signature="t",

1617

@dbus_service_property(_interface,

1618

signature="t",

1086

1619

access="readwrite")

1087

1620

def Interval_dbus_property(self, value=None):

1088

1621

if value is None: # get

1089

return dbus.UInt64(self.interval_milliseconds())

1622

return dbus.UInt64(self.interval.total_seconds() * 1000)

1090

1623

self.interval = datetime.timedelta(0, 0, 0, value)

1091

# Emit D-Bus signal

1092

self.PropertyChanged(dbus.String("Interval"),

1093

dbus.UInt64(value, variant_level=1))

1094

1624

if getattr(self, "checker_initiator_tag", None) is None:

1095

1625

return

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

1626

if self.enabled:

1627

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1632

1102

1633

# Checker - property

1103

@dbus_service_property(_interface, signature="s",

1634

@dbus_service_property(_interface,

1635

signature="s",

1104

1636

access="readwrite")

1105

1637

def Checker_dbus_property(self, value=None):

1106

1638

if value is None: # get

1107

1639

return dbus.String(self.checker_command)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

self.PropertyChanged(dbus.String("Checker"),

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1640

self.checker_command = str(value)

1113

1641

1114

1642

# CheckerRunning - property

1115

@dbus_service_property(_interface, signature="b",

1643

@dbus_service_property(_interface,

1644

signature="b",

1116

1645

access="readwrite")

1117

1646

def CheckerRunning_dbus_property(self, value=None):

1118

1647

if value is None: # get

1128

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1129

1658

1130

1659

# Secret = property

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1133

1664

def Secret_dbus_property(self, value):

1134

self.secret = str(value)

1665

self.secret = bytes(value)

1135

1666

1136

1667

del _interface

1137

1668

1141

1672

self._pipe = child_pipe

1142

1673

self._pipe.send(('init', fpr, address))

1143

1674

if not self._pipe.recv():

1144

raise KeyError()

1145

1675

raise KeyError(fpr)

1676

1146

1677

def __getattribute__(self, name):

1147

if(name == '_pipe'):

1678

if name == '_pipe':

1148

1679

return super(ProxyClient, self).__getattribute__(name)

1149

1680

self._pipe.send(('getattr', name))

1150

1681

data = self._pipe.recv()

1151

1682

if data[0] == 'data':

1152

1683

return data[1]

1153

1684

if data[0] == 'function':

1685

1154

1686

def func(*args, **kwargs):

1155

1687

self._pipe.send(('funcall', name, args, kwargs))

1156

1688

return self._pipe.recv()[1]

1689

1157

1690

return func

1158

1691

1159

1692

def __setattr__(self, name, value):

1160

if(name == '_pipe'):

1693

if name == '_pipe':

1161

1694

return super(ProxyClient, self).__setattr__(name, value)

1162

1695

self._pipe.send(('setattr', name, value))

1163

1696

1171

1704

def handle(self):

1172

1705

with contextlib.closing(self.server.child_pipe) as child_pipe:

1173

1706

logger.info("TCP connection from: %s",

1174

unicode(self.client_address))

1707

str(self.client_address))

1175

1708

logger.debug("Pipe FD: %d",

1176

1709

self.server.child_pipe.fileno())

1177

1178

session = (gnutls.connection

1179

.ClientSession(self.request,

1180

gnutls.connection

1181

.X509Credentials()))

1182

1710

1711

session = gnutls.connection.ClientSession(

1712

self.request, gnutls.connection .X509Credentials())

1713

1183

1714

# Note: gnutls.connection.X509Credentials is really a

1184

1715

# generic GnuTLS certificate credentials object so long as

1185

1716

# no X.509 keys are added to it. Therefore, we can use it

1186

1717

# here despite using OpenPGP certificates.

1187

1718

1188

1719

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1189

1720

# "+AES-256-CBC", "+SHA1",

1190

1721

# "+COMP-NULL", "+CTYPE-OPENPGP",

1193

1724

priority = self.server.gnutls_priority

1194

1725

if priority is None:

1195

1726

priority = "NORMAL"

1196

(gnutls.library.functions

1197

.gnutls_priority_set_direct(session._c_object,

1198

priority, None))

1199

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1729

1200

1730

# Start communication using the Mandos protocol

1201

1731

# Get protocol number

1202

1732

line = self.request.makefile().readline()

1203

1733

logger.debug("Protocol version: %r", line)

1204

1734

try:

1205

1735

if int(line.strip().split()[0]) > 1:

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1736

raise RuntimeError(line)

1737

except (ValueError, IndexError, RuntimeError) as error:

1208

1738

logger.error("Unknown protocol version: %s", error)

1209

1739

return

1210

1740

1211

1741

# Start GnuTLS connection

1212

1742

try:

1213

1743

session.handshake()

1214

except gnutls.errors.GNUTLSError, error:

1744

except gnutls.errors.GNUTLSError as error:

1215

1745

logger.warning("Handshake failed: %s", error)

1216

1746

# Do not run session.bye() here: the session is not

1217

1747

# established. Just abandon the request.

1218

1748

return

1219

1749

logger.debug("Handshake succeeded")

1220

1750

1221

1751

approval_required = False

1222

1752

try:

1223

1753

try:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

except (TypeError, gnutls.errors.GNUTLSError), error:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

1227

1758

logger.warning("Bad certificate: %s", error)

1228

1759

return

1229

1760

logger.debug("Fingerprint: %s", fpr)

1230

1761

1231

1762

try:

1232

1763

client = ProxyClient(child_pipe, fpr,

1233

1764

self.client_address)

1241

1772

1242

1773

while True:

1243

1774

if not client.enabled:

1244

logger.warning("Client %s is disabled",

1245

client.name)

1775

logger.info("Client %s is disabled",

1776

client.name)

1246

1777

if self.server.use_dbus:

1247

1778

# Emit D-Bus signal

1248

client.Rejected("Disabled")

1779

client.Rejected("Disabled")

1249

1780

return

1250

1781

1251

if client._approved or not client.approval_delay:

1782

if client.approved or not client.approval_delay:

1252

1783

#We are approved or approval is disabled

1253

1784

break

1254

elif client._approved is None:

1785

elif client.approved is None:

1255

1786

logger.info("Client %s needs approval",

1256

1787

client.name)

1257

1788

if self.server.use_dbus:

1258

1789

# Emit D-Bus signal

1259

1790

client.NeedApproval(

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1262

1793

else:

1263

1794

logger.warning("Client %s was not approved",

1264

1795

client.name)

1268

1799

return

1269

1800

1270

1801

#wait until timeout or approved

1271

#x = float(client._timedelta_to_milliseconds(delay))

1272

1802

time = datetime.datetime.now()

1273

1803

client.changedstate.acquire()

1274

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1804

client.changedstate.wait(delay.total_seconds())

1275

1805

client.changedstate.release()

1276

1806

time2 = datetime.datetime.now()

1277

1807

if (time2 - time) >= delay:

1292

1822

while sent_size < len(client.secret):

1293

1823

try:

1294

1824

sent = session.send(client.secret[sent_size:])

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1825

except gnutls.errors.GNUTLSError as error:

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1297

1828

return

1298

logger.debug("Sent: %d, remaining: %d",

1299

sent, len(client.secret)

1300

- (sent_size + sent))

1829

logger.debug("Sent: %d, remaining: %d", sent,

1830

len(client.secret) - (sent_size

1831

+ sent))

1301

1832

sent_size += sent

1302

1833

1303

1834

logger.info("Sending secret to %s", client.name)

1304

# bump the timeout as if seen

1305

client.checked_ok()

1835

# bump the timeout using extended_timeout

1836

client.bump_timeout(client.extended_timeout)

1306

1837

if self.server.use_dbus:

1307

1838

# Emit D-Bus signal

1308

1839

client.GotSecret()

1312

1843

client.approvals_pending -= 1

1313

1844

try:

1314

1845

session.bye()

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1846

except gnutls.errors.GNUTLSError as error:

1847

logger.warning("GnuTLS bye failed",

1848

exc_info=error)

1317

1849

1318

1850

@staticmethod

1319

1851

def peer_certificate(session):

1320

1852

"Return the peer's OpenPGP certificate as a bytestring"

1321

1853

# If not an OpenPGP certificate...

1322

if (gnutls.library.functions

1323

.gnutls_certificate_type_get(session._c_object)

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1324

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1325

1857

# ...do the normal thing

1326

1858

return session.peer_certificate

1340

1872

def fingerprint(openpgp):

1341

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1342

1874

# New GnuTLS "datum" with the OpenPGP public key

1343

datum = (gnutls.library.types

1344

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1345

ctypes.POINTER

1346

(ctypes.c_ubyte)),

1347

ctypes.c_uint(len(openpgp))))

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1348

1879

# New empty GnuTLS certificate

1349

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1350

(gnutls.library.functions

1351

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1352

1883

# Import the OpenPGP public key into the certificate

1353

(gnutls.library.functions

1354

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1355

gnutls.library.constants

1356

.GNUTLS_OPENPGP_FMT_RAW))

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1357

1887

# Verify the self signature in the key

1358

1888

crtverify = ctypes.c_uint()

1359

(gnutls.library.functions

1360

.gnutls_openpgp_crt_verify_self(crt, 0,

1361

ctypes.byref(crtverify)))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1362

1891

if crtverify.value != 0:

1363

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1364

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1366

1895

# New buffer for the fingerprint

1367

1896

buf = ctypes.create_string_buffer(20)

1368

1897

buf_len = ctypes.c_size_t()

1369

1898

# Get the fingerprint from the certificate into the buffer

1370

(gnutls.library.functions

1371

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1372

ctypes.byref(buf_len)))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

crt, ctypes.byref(buf), ctypes.byref(buf_len))

1373

1901

# Deinit the certificate

1374

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1375

1903

# Convert the buffer to a Python bytestring

1376

1904

fpr = ctypes.string_at(buf, buf_len.value)

1377

1905

# Convert the bytestring to hexadecimal notation

1378

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1906

hex_fpr = binascii.hexlify(fpr).upper()

1379

1907

return hex_fpr

1380

1908

1381

1909

1382

1910

class MultiprocessingMixIn(object):

1383

1911

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

1912

1384

1913

def sub_process_main(self, request, address):

1385

1914

try:

1386

1915

self.finish_request(request, address)

1387

except:

1916

except Exception:

1388

1917

self.handle_error(request, address)

1389

1918

self.close_request(request)

1390

1919

1391

1920

def process_request(self, request, address):

1392

1921

"""Start a new process to process the request."""

1393

multiprocessing.Process(target = self.sub_process_main,

1394

args = (request, address)).start()

1922

proc = multiprocessing.Process(target = self.sub_process_main,

1923

args = (request, address))

1924

proc.start()

1925

return proc

1926

1395

1927

1396

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1397

1929

""" adds a pipe to the MixIn """

1930

1398

1931

def process_request(self, request, client_address):

1399

1932

"""Overrides and wraps the original process_request().

1400

1933

1401

1934

This function creates a new pipe in self.pipe

1402

1935

"""

1403

1936

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1937

1938

proc = MultiprocessingMixIn.process_request(self, request,

1939

client_address)

1407

1940

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1941

self.add_pipe(parent_pipe, proc)

1942

1943

def add_pipe(self, parent_pipe, proc):

1411

1944

"""Dummy function; override as necessary"""

1412

raise NotImplementedError

1945

raise NotImplementedError()

1946

1413

1947

1414

1948

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1415

1949

socketserver.TCPServer, object):

1420

1954

interface: None or a network interface name (string)

1421

1955

use_ipv6: Boolean; to use IPv6 or not

1422

1956

"""

1957

1423

1958

def __init__(self, server_address, RequestHandlerClass,

1424

interface=None, use_ipv6=True):

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1962

"""If socketfd is set, use that file descriptor instead of

1963

creating a new one with socket.socket().

1964

"""

1425

1965

self.interface = interface

1426

1966

if use_ipv6:

1427

1967

self.address_family = socket.AF_INET6

1968

if socketfd is not None:

1969

# Save the file descriptor

1970

self.socketfd = socketfd

1971

# Save the original socket.socket() function

1972

self.socket_socket = socket.socket

1973

# To implement --socket, we monkey patch socket.socket.

1974

#

1975

# (When socketserver.TCPServer is a new-style class, we

1976

# could make self.socket into a property instead of monkey

1977

# patching socket.socket.)

1978

#

1979

# Create a one-time-only replacement for socket.socket()

1980

@functools.wraps(socket.socket)

1981

def socket_wrapper(*args, **kwargs):

1982

# Restore original function so subsequent calls are

1983

# not affected.

1984

socket.socket = self.socket_socket

1985

del self.socket_socket

1986

# This time only, return a new socket object from the

1987

# saved file descriptor.

1988

return socket.fromfd(self.socketfd, *args, **kwargs)

1989

# Replace socket.socket() function with wrapper

1990

socket.socket = socket_wrapper

1991

# The socketserver.TCPServer.__init__ will call

1992

# socket.socket(), which might be our replacement,

1993

# socket_wrapper(), if socketfd was set.

1428

1994

socketserver.TCPServer.__init__(self, server_address,

1429

1995

RequestHandlerClass)

1996

1430

1997

def server_bind(self):

1431

1998

"""This overrides the normal server_bind() function

1432

1999

to bind to an interface if one was specified, and also NOT to

1438

2005

self.interface)

1439

2006

else:

1440

2007

try:

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1442

SO_BINDTODEVICE,

1443

str(self.interface

1444

+ '\0'))

1445

except socket.error, error:

1446

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

1449

self.interface)

1450

elif error[0] == errno.ENOPROTOOPT:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

(self.interface + "\0").encode("utf-8"))

2011

except socket.error as error:

2012

if error.errno == errno.EPERM:

2013

logger.error("No permission to bind to"

2014

" interface %s", self.interface)

2015

elif error.errno == errno.ENOPROTOOPT:

1451

2016

logger.error("SO_BINDTODEVICE not available;"

1452

2017

" cannot bind to interface %s",

1453

2018

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

logger.error("Interface %s does not exist,"

2021

" cannot bind", self.interface)

1454

2022

else:

1455

2023

raise

1456

2024

# Only bind(2) the socket if we really need to.

1459

2027

if self.address_family == socket.AF_INET6:

1460

2028

any_address = "::" # in6addr_any

1461

2029

else:

1462

any_address = socket.INADDR_ANY

2030

any_address = "0.0.0.0" # INADDR_ANY

1463

2031

self.server_address = (any_address,

1464

2032

self.server_address[1])

1465

2033

elif not self.server_address[1]:

1466

self.server_address = (self.server_address[0],

1467

0)

2034

self.server_address = (self.server_address[0], 0)

1468

2035

# if self.interface:

1469

2036

# self.server_address = (self.server_address[0],

1470

2037

# 0, # port

1484

2051

1485

2052

Assumes a gobject.MainLoop event loop.

1486

2053

"""

2054

1487

2055

def __init__(self, server_address, RequestHandlerClass,

1488

interface=None, use_ipv6=True, clients=None,

1489

gnutls_priority=None, use_dbus=True):

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

1490

2062

self.enabled = False

1491

2063

self.clients = clients

1492

2064

if self.clients is None:

1493

self.clients = set()

2065

self.clients = {}

1494

2066

self.use_dbus = use_dbus

1495

2067

self.gnutls_priority = gnutls_priority

1496

2068

IPv6_TCPServer.__init__(self, server_address,

1497

2069

RequestHandlerClass,

1498

2070

interface = interface,

1499

use_ipv6 = use_ipv6)

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

1500

2074

def server_activate(self):

1501

2075

if self.enabled:

1502

2076

return socketserver.TCPServer.server_activate(self)

2077

1503

2078

def enable(self):

1504

2079

self.enabled = True

1505

def add_pipe(self, parent_pipe):

2080

2081

def add_pipe(self, parent_pipe, proc):

1506

2082

# Call "handle_ipc" for both data and EOF events

1507

gobject.io_add_watch(parent_pipe.fileno(),

1508

gobject.IO_IN | gobject.IO_HUP,

1509

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

1512

def handle_ipc(self, source, condition, parent_pipe=None,

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2089

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

1513

2093

client_object=None):

1514

condition_names = {

1515

gobject.IO_IN: "IN", # There is data to read.

1516

gobject.IO_OUT: "OUT", # Data can be written (without

1517

# blocking).

1518

gobject.IO_PRI: "PRI", # There is urgent data to read.

1519

gobject.IO_ERR: "ERR", # Error condition.

1520

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1521

# broken, usually for pipes and

1522

# sockets).

1523

}

1524

conditions_string = ' | '.join(name

1525

for cond, name in

1526

condition_names.iteritems()

1527

if cond & condition)

1528

# error or the other end of multiprocessing.Pipe has closed

1529

if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):

2094

# error, or the other end of multiprocessing.Pipe has closed

2095

if condition & (gobject.IO_ERR | gobject.IO_HUP):

2096

# Wait for other process to exit

2097

proc.join()

1530

2098

return False

1531

2099

1532

2100

# Read a request from the child

1537

2105

fpr = request[1]

1538

2106

address = request[2]

1539

2107

1540

for c in self.clients:

2108

for c in self.clients.itervalues():

1541

2109

if c.fingerprint == fpr:

1542

2110

client = c

1543

2111

break

1544

2112

else:

1545

logger.warning("Client not found for fingerprint: %s, ad"

1546

"dress: %s", fpr, address)

2113

logger.info("Client not found for fingerprint: %s, ad"

2114

"dress: %s", fpr, address)

1547

2115

if self.use_dbus:

1548

2116

# Emit D-Bus signal

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2117

mandos_dbus_service.ClientNotFound(fpr,

2118

address[0])

1550

2119

parent_pipe.send(False)

1551

2120

return False

1552

2121

1553

gobject.io_add_watch(parent_pipe.fileno(),

1554

gobject.IO_IN | gobject.IO_HUP,

1555

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

1558

2129

parent_pipe.send(True)

1559

# remove the old hook in favor of the new above hook on same fileno

2130

# remove the old hook in favor of the new above hook on

2131

# same fileno

1560

2132

return False

1561

2133

if command == 'funcall':

1562

2134

funcname = request[1]

1563

2135

args = request[2]

1564

2136

kwargs = request[3]

1565

2137

1566

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

1567

2138

parent_pipe.send(('data', getattr(client_object,

2139

funcname)(*args,

2140

**kwargs)))

2141

1568

2142

if command == 'getattr':

1569

2143

attrname = request[1]

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

1572

2147

else:

1573

parent_pipe.send(('data', client_object.__getattribute__(attrname)))

2148

parent_pipe.send((

2149

'data', client_object.__getattribute__(attrname)))

1574

2150

1575

2151

if command == 'setattr':

1576

2152

attrname = request[1]

1577

2153

value = request[2]

1578

2154

setattr(client_object, attrname, value)

1579

2155

1580

2156

return True

1581

2157

1582

2158

2159

def rfc3339_duration_to_delta(duration):

2160

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2161

2162

>>> rfc3339_duration_to_delta("P7D")

2163

datetime.timedelta(7)

2164

>>> rfc3339_duration_to_delta("PT60S")

2165

datetime.timedelta(0, 60)

2166

>>> rfc3339_duration_to_delta("PT60M")

2167

datetime.timedelta(0, 3600)

2168

>>> rfc3339_duration_to_delta("PT24H")

2169

datetime.timedelta(1)

2170

>>> rfc3339_duration_to_delta("P1W")

2171

datetime.timedelta(7)

2172

>>> rfc3339_duration_to_delta("PT5M30S")

2173

datetime.timedelta(0, 330)

2174

>>> rfc3339_duration_to_delta("P1DT3M20S")

2175

datetime.timedelta(1, 200)

2176

"""

2177

2178

# Parsing an RFC 3339 duration with regular expressions is not

2179

# possible - there would have to be multiple places for the same

2180

# values, like seconds. The current code, while more esoteric, is

2181

# cleaner without depending on a parsing library. If Python had a

2182

# built-in library for parsing we would use it, but we'd like to

2183

# avoid excessive use of external libraries.

2184

2185

# New type for defining tokens, syntax, and semantics all-in-one

2186

Token = collections.namedtuple("Token", (

2187

"regexp", # To match token; if "value" is not None, must have

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2191

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2192

# the "duration" ABNF definition in RFC 3339, Appendix A.

2193

token_end = Token(re.compile(r"$"), None, frozenset())

2194

token_second = Token(re.compile(r"(\d+)S"),

2195

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2197

token_minute = Token(re.compile(r"(\d+)M"),

2198

datetime.timedelta(minutes=1),

2199

frozenset((token_second, token_end)))

2200

token_hour = Token(re.compile(r"(\d+)H"),

2201

datetime.timedelta(hours=1),

2202

frozenset((token_minute, token_end)))

2203

token_time = Token(re.compile(r"T"),

2204

None,

2205

frozenset((token_hour, token_minute,

2206

token_second)))

2207

token_day = Token(re.compile(r"(\d+)D"),

2208

datetime.timedelta(days=1),

2209

frozenset((token_time, token_end)))

2210

token_month = Token(re.compile(r"(\d+)M"),

2211

datetime.timedelta(weeks=4),

2212

frozenset((token_day, token_end)))

2213

token_year = Token(re.compile(r"(\d+)Y"),

2214

datetime.timedelta(weeks=52),

2215

frozenset((token_month, token_end)))

2216

token_week = Token(re.compile(r"(\d+)W"),

2217

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2219

token_duration = Token(re.compile(r"P"), None,

2220

frozenset((token_year, token_month,

2221

token_day, token_time,

2222

token_week)))

2223

# Define starting values

2224

value = datetime.timedelta() # Value so far

2225

found_token = None

2226

followers = frozenset((token_duration, )) # Following valid tokens

2227

s = duration # String left to parse

2228

# Loop until end token is found

2229

while found_token is not token_end:

2230

# Search for any currently valid tokens

2231

for token in followers:

2232

match = token.regexp.match(s)

2233

if match is not None:

2234

# Token found

2235

if token.value is not None:

2236

# Value found, parse digits

2237

factor = int(match.group(1), 10)

2238

# Add to value so far

2239

value += factor * token.value

2240

# Strip token from string

2241

s = token.regexp.sub("", s, 1)

2242

# Go to found token

2243

found_token = token

2244

# Set valid next tokens

2245

followers = found_token.followers

2246

break

2247

else:

2248

# No currently valid tokens were found

2249

raise ValueError("Invalid RFC 3339 duration: {!r}"

2250

.format(duration))

2251

# End token found

2252

return value

2253

2254

1583

2255

def string_to_delta(interval):

1584

2256

"""Parse a string and return a datetime.timedelta

1585

2257

1596

2268

>>> string_to_delta('5m 30s')

1597

2269

datetime.timedelta(0, 330)

1598

2270

"""

2271

2272

try:

2273

return rfc3339_duration_to_delta(interval)

2274

except ValueError:

2275

pass

2276

1599

2277

timevalue = datetime.timedelta(0)

1600

2278

for s in interval.split():

1601

2279

try:

1602

suffix = unicode(s[-1])

2280

suffix = s[-1]

1603

2281

value = int(s[:-1])

1604

2282

if suffix == "d":

1605

2283

delta = datetime.timedelta(value)

1612

2290

elif suffix == "w":

1613

2291

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

1614

2292

else:

1615

raise ValueError("Unknown suffix %r" % suffix)

1616

except (ValueError, IndexError), e:

2293

raise ValueError("Unknown suffix {!r}".format(suffix))

2294

except IndexError as e:

1617

2295

raise ValueError(*(e.args))

1618

2296

timevalue += delta

1619

2297

return timevalue

1620

2298

1621

2299

1622

def if_nametoindex(interface):

1623

"""Call the C function if_nametoindex(), or equivalent

1624

1625

Note: This function cannot accept a unicode string."""

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

(ctypes.util.find_library("c"))

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

logger.warning("Doing if_nametoindex the hard way")

1633

def if_nametoindex(interface):

1634

"Get an interface index the hard way, i.e. using fcntl()"

1635

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

1636

with contextlib.closing(socket.socket()) as s:

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

struct.pack(str("16s16x"),

1639

interface))

1640

interface_index = struct.unpack(str("I"),

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

1646

2300

def daemon(nochdir = False, noclose = False):

1647

2301

"""See daemon(3). Standard BSD Unix function.

1648

2302

1656

2310

sys.exit()

1657

2311

if not noclose:

1658

2312

# Close all standard open file descriptors

1659

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2313

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1660

2314

if not stat.S_ISCHR(os.fstat(null).st_mode):

1661

2315

raise OSError(errno.ENODEV,

1662

"%s not a character device"

1663

% os.path.devnull)

2316

"{} not a character device"

2317

.format(os.devnull))

1664

2318

os.dup2(null, sys.stdin.fileno())

1665

2319

os.dup2(null, sys.stdout.fileno())

1666

2320

os.dup2(null, sys.stderr.fileno())

1675

2329

1676

2330

parser = argparse.ArgumentParser()

1677

2331

parser.add_argument("-v", "--version", action="version",

1678

version = "%%(prog)s %s" % version,

2332

version = "%(prog)s {}".format(version),

1679

2333

help="show version number and exit")

1680

2334

parser.add_argument("-i", "--interface", metavar="IF",

1681

2335

help="Bind to interface IF")

1687

2341

help="Run self-test")

1688

2342

parser.add_argument("--debug", action="store_true",

1689

2343

help="Debug mode; run in foreground and log"

1690

" to terminal")

2344

" to terminal", default=None)

1691

2345

parser.add_argument("--debuglevel", metavar="LEVEL",

1692

2346

help="Debug level for stdout output")

1693

2347

parser.add_argument("--priority", help="GnuTLS"

1700

2354

" files")

1701

2355

parser.add_argument("--no-dbus", action="store_false",

1702

2356

dest="use_dbus", help="Do not provide D-Bus"

1703

" system bus interface")

2357

" system bus interface", default=None)

1704

2358

parser.add_argument("--no-ipv6", action="store_false",

1705

dest="use_ipv6", help="Do not use IPv6")

2359

dest="use_ipv6", help="Do not use IPv6",

2360

default=None)

2361

parser.add_argument("--no-restore", action="store_false",

2362

dest="restore", help="Do not restore stored"

2363

" state", default=None)

2364

parser.add_argument("--socket", type=int,

2365

help="Specify a file descriptor to a network"

2366

" socket to use instead of creating one")

2367

parser.add_argument("--statedir", metavar="DIR",

2368

help="Directory to save/restore state in")

2369

parser.add_argument("--foreground", action="store_true",

2370

help="Run in foreground", default=None)

2371

parser.add_argument("--no-zeroconf", action="store_false",

2372

dest="zeroconf", help="Do not use Zeroconf",

2373

default=None)

2374

1706

2375

options = parser.parse_args()

1707

2376

1708

2377

if options.check:

1709

2378

import doctest

1710

doctest.testmod()

1711

sys.exit()

2379

fail_count, test_count = doctest.testmod()

2380

sys.exit(os.EX_OK if fail_count == 0 else 1)

1712

2381

1713

2382

# Default values for config file for server-global settings

1714

2383

server_defaults = { "interface": "",

1716

2385

"port": "",

1717

2386

"debug": "False",

1718

2387

"priority":

1719

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2388

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

2389

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

1720

2390

"servicename": "Mandos",

1721

2391

"use_dbus": "True",

1722

2392

"use_ipv6": "True",

1723

2393

"debuglevel": "",

1724

}

2394

"restore": "True",

2395

"socket": "",

2396

"statedir": "/var/lib/mandos",

2397

"foreground": "False",

2398

"zeroconf": "True",

2399

}

1725

2400

1726

2401

# Parse config file for server-global settings

1727

2402

server_config = configparser.SafeConfigParser(server_defaults)

1728

2403

del server_defaults

1729

server_config.read(os.path.join(options.configdir,

1730

"mandos.conf"))

2404

server_config.read(os.path.join(options.configdir, "mandos.conf"))

1731

2405

# Convert the SafeConfigParser object to a dict

1732

2406

server_settings = server_config.defaults()

1733

2407

# Use the appropriate methods on the non-string config options

1734

for option in ("debug", "use_dbus", "use_ipv6"):

2408

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

1735

2409

server_settings[option] = server_config.getboolean("DEFAULT",

1736

2410

option)

1737

2411

if server_settings["port"]:

1738

2412

server_settings["port"] = server_config.getint("DEFAULT",

1739

2413

"port")

2414

if server_settings["socket"]:

2415

server_settings["socket"] = server_config.getint("DEFAULT",

2416

"socket")

2417

# Later, stdin will, and stdout and stderr might, be dup'ed

2418

# over with an opened os.devnull. But we don't want this to

2419

# happen with a supplied network socket.

2420

if 0 <= server_settings["socket"] <= 2:

2421

server_settings["socket"] = os.dup(server_settings

2422

["socket"])

1740

2423

del server_config

1741

2424

1742

2425

# Override the settings from the config file with command line

1743

2426

# options, if set.

1744

2427

for option in ("interface", "address", "port", "debug",

1745

"priority", "servicename", "configdir",

1746

"use_dbus", "use_ipv6", "debuglevel"):

2428

"priority", "servicename", "configdir", "use_dbus",

2429

"use_ipv6", "debuglevel", "restore", "statedir",

2430

"socket", "foreground", "zeroconf"):

1747

2431

value = getattr(options, option)

1748

2432

if value is not None:

1749

2433

server_settings[option] = value

1750

2434

del options

1751

2435

# Force all strings to be unicode

1752

2436

for option in server_settings.keys():

1753

if type(server_settings[option]) is str:

1754

server_settings[option] = unicode(server_settings[option])

2437

if isinstance(server_settings[option], bytes):

2438

server_settings[option] = (server_settings[option]

2439

.decode("utf-8"))

2440

# Force all boolean options to be boolean

2441

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2442

"foreground", "zeroconf"):

2443

server_settings[option] = bool(server_settings[option])

2444

# Debug implies foreground

2445

if server_settings["debug"]:

2446

server_settings["foreground"] = True

1755

2447

# Now we have our good server settings in "server_settings"

1756

2448

1757

2449

##################################################################

1758

2450

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

or server_settings["socket"] != "")):

2454

parser.error("Needs port or socket to work without Zeroconf")

2455

1759

2456

# For convenience

1760

2457

debug = server_settings["debug"]

1761

2458

debuglevel = server_settings["debuglevel"]

1762

2459

use_dbus = server_settings["use_dbus"]

1763

2460

use_ipv6 = server_settings["use_ipv6"]

1764

2461

stored_state_path = os.path.join(server_settings["statedir"],

2462

stored_state_file)

2463

foreground = server_settings["foreground"]

2464

zeroconf = server_settings["zeroconf"]

2465

2466

if debug:

2467

initlogger(debug, logging.DEBUG)

2468

else:

2469

if not debuglevel:

2470

initlogger(debug)

2471

else:

2472

level = getattr(logging, debuglevel.upper())

2473

initlogger(debug, level)

2474

1765

2475

if server_settings["servicename"] != "Mandos":

1766

syslogger.setFormatter(logging.Formatter

1767

('Mandos (%s) [%%(process)d]:'

1768

' %%(levelname)s: %%(message)s'

1769

% server_settings["servicename"]))

2476

syslogger.setFormatter(

2477

logging.Formatter('Mandos ({}) [%(process)d]:'

2478

' %(levelname)s: %(message)s'.format(

2479

server_settings["servicename"])))

1770

2480

1771

2481

# Parse config file with clients

1772

client_defaults = { "timeout": "1h",

1773

"interval": "5m",

1774

"checker": "fping -q -- %%(host)s",

1775

"host": "",

1776

"approval_delay": "0s",

1777

"approval_duration": "1s",

1778

}

1779

client_config = configparser.SafeConfigParser(client_defaults)

2482

client_config = configparser.SafeConfigParser(Client

2483

.client_defaults)

1780

2484

client_config.read(os.path.join(server_settings["configdir"],

1781

2485

"clients.conf"))

1782

2486

1783

2487

global mandos_dbus_service

1784

2488

mandos_dbus_service = None

1785

2489

1786

tcp_server = MandosServer((server_settings["address"],

1787

server_settings["port"]),

1788

ClientHandler,

1789

interface=(server_settings["interface"]

1790

or None),

1791

use_ipv6=use_ipv6,

1792

gnutls_priority=

1793

server_settings["priority"],

1794

use_dbus=use_dbus)

1795

if not debug:

1796

pidfilename = "/var/run/mandos.pid"

2490

socketfd = None

2491

if server_settings["socket"] != "":

2492

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

(server_settings["address"], server_settings["port"]),

2495

ClientHandler,

2496

interface=(server_settings["interface"] or None),

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2501

if not foreground:

2502

pidfilename = "/run/mandos.pid"

2503

if not os.path.isdir("/run/."):

2504

pidfilename = "/var/run/mandos.pid"

2505

pidfile = None

1797

2506

try:

1798

pidfile = open(pidfilename, "w")

1799

except IOError:

1800

logger.error("Could not open file %r", pidfilename)

2507

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2508

except IOError as e:

2509

logger.error("Could not open file %r", pidfilename,

2510

exc_info=e)

1801

2511

1802

try:

1803

uid = pwd.getpwnam("_mandos").pw_uid

1804

gid = pwd.getpwnam("_mandos").pw_gid

1805

except KeyError:

2512

for name in ("_mandos", "mandos", "nobody"):

1806

2513

try:

1807

uid = pwd.getpwnam("mandos").pw_uid

1808

gid = pwd.getpwnam("mandos").pw_gid

2514

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

2516

break

1809

2517

except KeyError:

1810

try:

1811

uid = pwd.getpwnam("nobody").pw_uid

1812

gid = pwd.getpwnam("nobody").pw_gid

1813

except KeyError:

1814

uid = 65534

1815

gid = 65534

2518

continue

2519

else:

2520

uid = 65534

2521

gid = 65534

1816

2522

try:

1817

2523

os.setgid(gid)

1818

2524

os.setuid(uid)

1819

except OSError, error:

1820

if error[0] != errno.EPERM:

1821

raise error

2525

except OSError as error:

2526

if error.errno != errno.EPERM:

2527

raise

1822

2528

1823

if not debug and not debuglevel:

1824

syslogger.setLevel(logging.WARNING)

1825

console.setLevel(logging.WARNING)

1826

if debuglevel:

1827

level = getattr(logging, debuglevel.upper())

1828

syslogger.setLevel(level)

1829

console.setLevel(level)

1830

1831

2529

if debug:

1832

2530

# Enable all possible GnuTLS debugging

1833

2531

1839

2537

def debug_gnutls(level, string):

1840

2538

logger.debug("GnuTLS: %s", string[:-1])

1841

2539

1842

(gnutls.library.functions

1843

.gnutls_global_set_log_function(debug_gnutls))

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

1844

2542

1845

2543

# Redirect stdin so all checkers get /dev/null

1846

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2544

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1847

2545

os.dup2(null, sys.stdin.fileno())

1848

2546

if null > 2:

1849

2547

os.close(null)

1850

else:

1851

# No console logging

1852

logger.removeHandler(console)

1853

2548

1854

2549

# Need to fork before connecting to D-Bus

1855

if not debug:

2550

if not foreground:

1856

2551

# Close all input and output, do double fork, etc.

1857

2552

daemon()

1858

2553

2554

# multiprocessing will use threads, so before we use gobject we

2555

# need to inform gobject that threads will be used.

2556

gobject.threads_init()

2557

1859

2558

global main_loop

1860

2559

# From the Avahi example code

1861

DBusGMainLoop(set_as_default=True )

2560

DBusGMainLoop(set_as_default=True)

1862

2561

main_loop = gobject.MainLoop()

1863

2562

bus = dbus.SystemBus()

1864

2563

# End of Avahi example code

1865

2564

if use_dbus:

1866

2565

try:

1867

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1868

bus, do_not_queue=True)

1869

except dbus.exceptions.NameExistsException, e:

1870

logger.error(unicode(e) + ", disabling D-Bus")

2566

bus_name = dbus.service.BusName("se.recompile.Mandos",

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

"se.bsnet.fukt.Mandos", bus,

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2573

logger.error("Disabling D-Bus:", exc_info=e)

1871

2574

use_dbus = False

1872

2575

server_settings["use_dbus"] = False

1873

2576

tcp_server.use_dbus = False

1874

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1875

service = AvahiService(name = server_settings["servicename"],

1876

servicetype = "_mandos._tcp",

1877

protocol = protocol, bus = bus)

1878

if server_settings["interface"]:

1879

service.interface = (if_nametoindex

1880

(str(server_settings["interface"])))

2577

if zeroconf:

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2584

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

server_settings["interface"].encode("utf-8"))

1881

2587

1882

2588

global multiprocessing_manager

1883

2589

multiprocessing_manager = multiprocessing.Manager()

1885

2591

client_class = Client

1886

2592

if use_dbus:

1887

2593

client_class = functools.partial(ClientDBus, bus = bus)

1888

def client_config_items(config, section):

1889

special_settings = {

1890

"approved_by_default":

1891

lambda: config.getboolean(section,

1892

"approved_by_default"),

1893

}

1894

for name, value in config.items(section):

2594

2595

client_settings = Client.config_parser(client_config)

2596

old_client_settings = {}

2597

clients_data = {}

2598

2599

# This is used to redirect stdout and stderr for checker processes

2600

global wnull

2601

wnull = open(os.devnull, "w") # A writable /dev/null

2602

# Only used if server is running in foreground but not in debug

2603

# mode

2604

if debug or not foreground:

2605

wnull.close()

2606

2607

# Get client data and settings from last running state.

2608

if server_settings["restore"]:

2609

try:

2610

with open(stored_state_path, "rb") as stored_state:

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2613

os.remove(stored_state_path)

2614

except IOError as e:

2615

if e.errno == errno.ENOENT:

2616

logger.warning("Could not load persistent state:"

2617

" {}".format(os.strerror(e.errno)))

2618

else:

2619

logger.critical("Could not load persistent state:",

2620

exc_info=e)

2621

raise

2622

except EOFError as e:

2623

logger.warning("Could not load persistent state: "

2624

"EOFError:",

2625

exc_info=e)

2626

2627

with PGPEngine() as pgp:

2628

for client_name, client in clients_data.items():

2629

# Skip removed clients

2630

if client_name not in client_settings:

2631

continue

2632

2633

# Decide which value to use after restoring saved state.

2634

# We have three different values: Old config file,

2635

# new config file, and saved state.

2636

# New config value takes precedence if it differs from old

2637

# config value, otherwise use saved state.

2638

for name, value in client_settings[client_name].items():

2639

try:

2640

# For each value in new config, check if it

2641

# differs from the old config value (Except for

2642

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2646

client[name] = value

2647

except KeyError:

2648

pass

2649

2650

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2652

# whose checker succeeded before we stored its state is

2653

# assumed to have successfully run all checkers during

2654

# downtime.

2655

if client["enabled"]:

2656

if datetime.datetime.utcnow() >= client["expires"]:

2657

if not client["last_checked_ok"]:

2658

logger.warning(

2659

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2662

client["enabled"] = False

2663

elif client["last_checker_status"] != 0:

2664

logger.warning(

2665

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2670

client["enabled"] = False

2671

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2675

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

1895

2678

try:

1896

yield (name, special_settings[name]())

1897

except KeyError:

1898

yield (name, value)

1899

1900

tcp_server.clients.update(set(

1901

client_class(name = section,

1902

config= dict(client_config_items(

1903

client_config, section)))

1904

for section in client_config.sections()))

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2682

except PGPError:

2683

# If decryption fails, we use secret from new settings

2684

logger.debug("Failed to decrypt {} old secret".format(

2685

client_name))

2686

client["secret"] = (client_settings[client_name]

2687

["secret"])

2688

2689

# Add/remove clients based on new changes made to config

2690

for client_name in (set(old_client_settings)

2691

- set(client_settings)):

2692

del clients_data[client_name]

2693

for client_name in (set(client_settings)

2694

- set(old_client_settings)):

2695

clients_data[client_name] = client_settings[client_name]

2696

2697

# Create all client objects

2698

for client_name, client in clients_data.items():

2699

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2702

server_settings = server_settings)

2703

1905

2704

if not tcp_server.clients:

1906

2705

logger.warning("No clients defined")

1907

1908

if not debug:

1909

try:

1910

with pidfile:

1911

pid = os.getpid()

1912

pidfile.write(str(pid) + "\n".encode("utf-8"))

1913

del pidfile

1914

except IOError:

1915

logger.error("Could not write to file %r with PID %d",

1916

pidfilename, pid)

1917

except NameError:

1918

# "pidfile" was never created

1919

pass

2706

2707

if not foreground:

2708

if pidfile is not None:

2709

pid = os.getpid()

2710

try:

2711

with pidfile:

2712

print(pid, file=pidfile)

2713

except IOError:

2714

logger.error("Could not write to file %r with PID %d",

2715

pidfilename, pid)

2716

del pidfile

1920

2717

del pidfilename

1921

1922

signal.signal(signal.SIGINT, signal.SIG_IGN)

1923

2718

1924

2719

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

1925

2720

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

1926

2721

1927

2722

if use_dbus:

1928

class MandosDBusService(dbus.service.Object):

2723

2724

@alternate_dbus_interfaces(

2725

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2726

class MandosDBusService(DBusObjectWithProperties):

1929

2727

"""A D-Bus proxy object"""

2728

1930

2729

def __init__(self):

1931

2730

dbus.service.Object.__init__(self, bus, "/")

1932

_interface = "se.bsnet.fukt.Mandos"

2731

2732

_interface = "se.recompile.Mandos"

2733

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

"org.freedesktop.DBus.Property.EmitsChangedSignal":

2738

"false" }

1933

2739

1934

2740

@dbus.service.signal(_interface, signature="o")

1935

2741

def ClientAdded(self, objpath):

1949

2755

@dbus.service.method(_interface, out_signature="ao")

1950

2756

def GetAllClients(self):

1951

2757

"D-Bus method"

1952

return dbus.Array(c.dbus_object_path

1953

for c in tcp_server.clients)

2758

return dbus.Array(c.dbus_object_path for c in

2759

tcp_server.clients.itervalues())

1954

2760

1955

2761

@dbus.service.method(_interface,

1956

2762

out_signature="a{oa{sv}}")

1957

2763

def GetAllClientsWithProperties(self):

1958

2764

"D-Bus method"

1959

2765

return dbus.Dictionary(

1960

((c.dbus_object_path, c.GetAll(""))

1961

for c in tcp_server.clients),

2766

{ c.dbus_object_path: c.GetAll("")

2767

for c in tcp_server.clients.itervalues() },

1962

2768

signature="oa{sv}")

1963

2769

1964

2770

@dbus.service.method(_interface, in_signature="o")

1965

2771

def RemoveClient(self, object_path):

1966

2772

"D-Bus method"

1967

for c in tcp_server.clients:

2773

for c in tcp_server.clients.itervalues():

1968

2774

if c.dbus_object_path == object_path:

1969

tcp_server.clients.remove(c)

2775

del tcp_server.clients[c.name]

1970

2776

c.remove_from_connection()

1971

2777

# Don't signal anything except ClientRemoved

1972

2778

c.disable(quiet=True)

1981

2787

1982

2788

def cleanup():

1983

2789

"Cleanup function; run on exit"

1984

service.cleanup()

1985

2790

if zeroconf:

2791

service.cleanup()

2792

2793

multiprocessing.active_children()

2794

wnull.close()

2795

if not (tcp_server.clients or client_settings):

2796

return

2797

2798

# Store client before exiting. Secrets are encrypted with key

2799

# based on what config file has. If config file is

2800

# removed/edited, old secret will thus be unrecovable.

2801

clients = {}

2802

with PGPEngine() as pgp:

2803

for client in tcp_server.clients.itervalues():

2804

key = client_settings[client.name]["secret"]

2805

client.encrypted_secret = pgp.encrypt(client.secret,

2806

key)

2807

client_dict = {}

2808

2809

# A list of attributes that can not be pickled

2810

# + secret.

2811

exclude = { "bus", "changedstate", "secret",

2812

"checker", "server_settings" }

2813

for name, typ in inspect.getmembers(dbus.service

2814

.Object):

2815

exclude.add(name)

2816

2817

client_dict["encrypted_secret"] = (client

2818

.encrypted_secret)

2819

for attr in client.client_structure:

2820

if attr not in exclude:

2821

client_dict[attr] = getattr(client, attr)

2822

2823

clients[client.name] = client_dict

2824

del client_settings[client.name]["secret"]

2825

2826

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2833

pickle.dump((clients, client_settings), stored_state)

2834

tempname = stored_state.name

2835

os.rename(tempname, stored_state_path)

2836

except (IOError, OSError) as e:

2837

if not debug:

2838

try:

2839

os.remove(tempname)

2840

except NameError:

2841

pass

2842

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2843

logger.warning("Could not save persistent state: {}"

2844

.format(os.strerror(e.errno)))

2845

else:

2846

logger.warning("Could not save persistent state:",

2847

exc_info=e)

2848

raise

2849

2850

# Delete all clients, and settings from config

1986

2851

while tcp_server.clients:

1987

client = tcp_server.clients.pop()

2852

name, client = tcp_server.clients.popitem()

1988

2853

if use_dbus:

1989

2854

client.remove_from_connection()

1990

client.disable_hook = None

1991

2855

# Don't signal anything except ClientRemoved

1992

2856

client.disable(quiet=True)

1993

2857

if use_dbus:

1994

2858

# Emit D-Bus signal

1995

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1996

client.name)

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2861

client_settings.clear()

1997

2862

1998

2863

atexit.register(cleanup)

1999

2864

2000

for client in tcp_server.clients:

2865

for client in tcp_server.clients.itervalues():

2001

2866

if use_dbus:

2002

2867

# Emit D-Bus signal

2003

2868

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2004

client.enable()

2869

# Need to initiate checking of clients

2870

if client.enabled:

2871

client.init_checker()

2005

2872

2006

2873

tcp_server.enable()

2007

2874

tcp_server.server_activate()

2008

2875

2009

2876

# Find out what port we got

2010

service.port = tcp_server.socket.getsockname()[1]

2877

if zeroconf:

2878

service.port = tcp_server.socket.getsockname()[1]

2011

2879

if use_ipv6:

2012

2880

logger.info("Now listening on address %r, port %d,"

2013

" flowinfo %d, scope_id %d"

2014

% tcp_server.socket.getsockname())

2881

" flowinfo %d, scope_id %d",

2882

*tcp_server.socket.getsockname())

2015

2883

else: # IPv4

2016

logger.info("Now listening on address %r, port %d"

2017

% tcp_server.socket.getsockname())

2884

logger.info("Now listening on address %r, port %d",

2885

*tcp_server.socket.getsockname())

2018

2886

2019

2887

#service.interface = tcp_server.socket.getsockname()[3]

2020

2888

2021

2889

try:

2022

# From the Avahi example code

2023

try:

2024

service.activate()

2025

except dbus.exceptions.DBusException, error:

2026

logger.critical("DBusException: %s", error)

2027

cleanup()

2028

sys.exit(1)

2029

# End of Avahi example code

2890

if zeroconf:

2891

# From the Avahi example code

2892

try:

2893

service.activate()

2894

except dbus.exceptions.DBusException as error:

2895

logger.critical("D-Bus Exception", exc_info=error)

2896

cleanup()

2897

sys.exit(1)

2898

# End of Avahi example code

2030

2899

2031

2900

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2032

2901

lambda *args, **kwargs:

2035

2904

2036

2905

logger.debug("Starting main loop")

2037

2906

main_loop.run()

2038

except AvahiError, error:

2039

logger.critical("AvahiError: %s", error)

2907

except AvahiError as error:

2908

logger.critical("Avahi Error", exc_info=error)

2040

2909

cleanup()

2041

2910

sys.exit(1)

2042

2911

except KeyboardInterrupt:

2047

2916

# Must run before the D-Bus bus name gets deregistered

2048

2917

cleanup()

2049

2918

2919

2050

2920

if __name__ == '__main__':

2051

2921

main()