/mandos/trunk : revision 466

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#!/usr/bin/python2.7

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#!/usr/bin/python

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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@recompile.se>.

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# Contact the authors at <mandos@fukt.bsnet.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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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 SocketServer as socketserver

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import socket

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import argparse

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import optparse

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import datetime

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import errno

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import gnutls.crypto

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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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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 ConfigParser as 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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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 cPickle as 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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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 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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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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version = "1.2.3"

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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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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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

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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,

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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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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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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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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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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 = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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

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self.name)

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if remove:

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self.remove()

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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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try:

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self.add()

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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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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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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.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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self.group.connect_to_signal('StateChanged',

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self

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.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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str(error))

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

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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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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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try:

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self.group.Free()

375

except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group.Free()

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self.group = None

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self.remove()

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

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def server_state_changed(self, state):

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

383

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

384

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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}

390

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])

394

else:

395

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

396

self.cleanup()

223

if state == avahi.SERVER_COLLISION:

224

logger.error("Zeroconf server name collision")

225

self.remove()

397

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elif state == avahi.SERVER_RUNNING:

398

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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"""

407

230

if self.server is None:

408

231

self.server = dbus.Interface(

409

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self.bus.get_object(avahi.DBUS_NAME,

410

avahi.DBUS_PATH_SERVER,

411

follow_name_owner_changes=True),

233

avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

413

235

self.server.connect_to_signal("StateChanged",

414

self.server_state_changed)

236

self.server_state_changed)

415

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

416

238

417

239

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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

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427

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class Client(object):

429

241

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

430

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431

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Attributes:

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

244

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

433

245

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

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

435

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

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

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checker_initiator_tag: a gobject event source tag, or None

444

256

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

445

client_structure: Object describing what attributes a client has

446

and is used for storing the client at exit

447

257

current_checker_command: string; current running checker_command

258

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

448

259

disable_initiator_tag: a gobject event source tag, or None

449

260

enabled: bool()

450

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

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

454

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

455

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

456

last_checker_status: integer between 0 and 255 reflecting exit

457

status of last checker. -1 reflects crashed

458

checker, -2 means no checker completed yet.

459

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

267

last_enabled: datetime.datetime(); (UTC)

460

268

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

461

269

D-Bus identifiers

462

270

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

463

271

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

464

272

until this client is disabled

465

extended_timeout: extra long timeout when secret has been sent

466

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runtime_expansions: Allowed attributes for runtime expansion.

467

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

468

disabled, or None

469

server_settings: The server_settings dict from main()

470

274

"""

471

275

472

276

runtime_expansions = ("approval_delay", "approval_duration",

473

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

474

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

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"last_approval_request", "last_checked_ok",

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

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

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

477

client_defaults = {

478

"timeout": "PT5M",

479

"extended_timeout": "PT15M",

480

"interval": "PT2M",

481

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

482

"host": "",

483

"approval_delay": "PT0S",

484

"approval_duration": "PT1S",

485

"approved_by_default": "True",

486

"enabled": "True",

487

}

488

280

489

281

@staticmethod

490

def config_parser(config):

491

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

492

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

493

with exceptions for any special settings as defined above.

494

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

495

value given the same arguments.

496

"""

497

settings = {}

498

for client_name in config.sections():

499

section = dict(config.items(client_name))

500

client = settings[client_name] = {}

501

502

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

503

# Reformat values from string types to Python types

504

client["approved_by_default"] = config.getboolean(

505

client_name, "approved_by_default")

506

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

507

"enabled")

508

509

# Uppercase and remove spaces from fingerprint for later

510

# comparison purposes with return value from the

511

# fingerprint() function

512

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

513

.replace(" ", ""))

514

if "secret" in section:

515

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

516

elif "secfile" in section:

517

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

518

(section["secfile"])),

519

"rb") as secfile:

520

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

521

else:

522

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

523

.format(section))

524

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

525

client["extended_timeout"] = string_to_delta(

526

section["extended_timeout"])

527

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

528

client["approval_delay"] = string_to_delta(

529

section["approval_delay"])

530

client["approval_duration"] = string_to_delta(

531

section["approval_duration"])

532

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

533

client["last_approval_request"] = None

534

client["last_checked_ok"] = None

535

client["last_checker_status"] = -2

536

537

return settings

538

539

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

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."""

540

303

self.name = name

541

if server_settings is None:

542

server_settings = {}

543

self.server_settings = server_settings

544

# adding all client settings

545

for setting, value in settings.items():

546

setattr(self, setting, value)

547

548

if self.enabled:

549

if not hasattr(self, "last_enabled"):

550

self.last_enabled = datetime.datetime.utcnow()

551

if not hasattr(self, "expires"):

552

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

553

+ self.timeout)

554

else:

555

self.last_enabled = None

556

self.expires = None

557

304

if config is None:

305

config = {}

558

306

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(" ", ""))

559

312

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

560

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

561

datetime.datetime.utcnow())

562

563

# attributes specific for this server instance

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

564

332

self.checker = None

565

333

self.checker_initiator_tag = None

566

334

self.disable_initiator_tag = None

567

335

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

568

337

self.current_checker_command = None

569

self.approved = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

570

342

self.approvals_pending = 0

571

self.changedstate = multiprocessing_manager.Condition(

572

multiprocessing_manager.Lock())

573

self.client_structure = [attr

574

for attr in self.__dict__.iterkeys()

575

if not attr.startswith("_")]

576

self.client_structure.append("client_structure")

577

578

for name, t in inspect.getmembers(

579

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

580

if not name.startswith("_"):

581

self.client_structure.append(name)

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

348

583

# Send notice to process children that client state has changed

584

349

def send_changedstate(self):

585

with self.changedstate:

586

self.changedstate.notify_all()

587

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

588

354

def enable(self):

589

355

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

590

356

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

591

357

# Already enabled

592

358

return

593

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

594

self.enabled = True

359

self.send_changedstate()

595

360

self.last_enabled = datetime.datetime.utcnow()

596

self.init_checker()

597

self.send_changedstate()

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()

598

373

599

374

def disable(self, quiet=True):

600

375

"""Disable this client."""

601

376

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

602

377

return False

603

378

if not quiet:

379

self.send_changedstate()

380

if not quiet:

604

381

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

605

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

382

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

606

383

gobject.source_remove(self.disable_initiator_tag)

607

384

self.disable_initiator_tag = None

608

self.expires = None

609

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

385

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

610

386

gobject.source_remove(self.checker_initiator_tag)

611

387

self.checker_initiator_tag = None

612

388

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

613

391

self.enabled = False

614

if not quiet:

615

self.send_changedstate()

616

392

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

617

393

return False

618

394

619

395

def __del__(self):

396

self.disable_hook = None

620

397

self.disable()

621

398

622

def init_checker(self):

623

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

624

# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

self.checker_initiator_tag = gobject.timeout_add(

628

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

629

self.start_checker)

630

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

631

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

self.disable_initiator_tag = gobject.timeout_add(

634

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

635

# Also start a new checker *right now*.

636

self.start_checker()

637

638

399

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

639

400

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

640

401

self.checker_callback_tag = None

641

402

self.checker = None

642

403

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

644

if self.last_checker_status == 0:

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

645

406

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

646

407

vars(self))

647

408

self.checked_ok()

648

409

else:

649

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

410

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

411

vars(self))

650

412

else:

651

self.last_checker_status = -1

652

413

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

653

414

vars(self))

654

415

655

416

def checked_ok(self):

656

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

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

"""

657

422

self.last_checked_ok = datetime.datetime.utcnow()

658

self.last_checker_status = 0

659

self.bump_timeout()

660

661

def bump_timeout(self, timeout=None):

662

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

663

if timeout is None:

664

timeout = self.timeout

665

if self.disable_initiator_tag is not None:

666

gobject.source_remove(self.disable_initiator_tag)

667

self.disable_initiator_tag = None

668

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

669

self.disable_initiator_tag = gobject.timeout_add(

670

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

671

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

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

672

427

673

428

def need_approval(self):

674

429

self.last_approval_request = datetime.datetime.utcnow()

679

434

If a checker already exists, leave it running and do

680

435

nothing."""

681

436

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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

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

686

441

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

687

442

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

688

443

# should be.

690

445

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

691

446

try:

692

447

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

698

452

else:

699

453

if pid:

700

454

logger.warning("Checker was a zombie")

703

457

self.current_checker_command)

704

458

# Start a new checker if needed

705

459

if self.checker is None:

706

# Escape attributes for the shell

707

escaped_attrs = {

708

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

709

for attr in self.runtime_expansions }

710

460

try:

711

command = self.checker_command % escaped_attrs

712

except TypeError as error:

713

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

714

self.checker_command,

715

exc_info=error)

716

return True # Try again later

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

717

479

self.current_checker_command = command

718

480

try:

719

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

720

self.name)

481

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

482

command, self.name)

721

483

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

722

484

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

723

485

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

724

486

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

487

self.checker = subprocess.Popen(command,

734

488

close_fds=True,

735

shell=True,

736

cwd="/",

737

**popen_args)

738

except OSError as error:

739

logger.error("Failed to start subprocess",

740

exc_info=error)

741

return True

742

self.checker_callback_tag = gobject.child_watch_add(

743

self.checker.pid, self.checker_callback, data=command)

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

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.

747

496

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

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)

758

503

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

759

504

return True

760

505

767

512

return

768

513

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

769

514

try:

770

self.checker.terminate()

515

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

771

516

#time.sleep(0.5)

772

517

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

773

# self.checker.kill()

774

except OSError as error:

518

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

519

except OSError, error:

775

520

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

776

521

raise

777

522

self.checker = None

778

523

779

780

def dbus_service_property(dbus_interface,

781

signature="v",

782

access="readwrite",

783

byte_arrays=False):

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

784

526

"""Decorators for marking methods of a DBusObjectWithProperties to

785

527

become properties on the D-Bus.

786

528

795

537

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

796

538

if byte_arrays and signature != "ay":

797

539

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

798

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

799

540

" signature %r" % signature)

800

541

def decorator(func):

801

542

func._dbus_is_property = True

802

543

func._dbus_interface = dbus_interface

807

548

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

808

549

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

809

550

return func

810

811

return decorator

812

813

814

def dbus_interface_annotations(dbus_interface):

815

"""Decorator for marking functions returning interface annotations

816

817

Usage:

818

819

@dbus_interface_annotations("org.example.Interface")

820

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

821

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

822

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

823

"false"}

824

"""

825

826

def decorator(func):

827

func._dbus_is_interface = True

828

func._dbus_interface = dbus_interface

829

func._dbus_name = dbus_interface

830

return func

831

832

return decorator

833

834

835

def dbus_annotations(annotations):

836

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

837

Usage:

838

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

842

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

843

access="r")

844

def Property_dbus_property(self):

845

return dbus.Boolean(False)

846

"""

847

848

def decorator(func):

849

func._dbus_annotations = annotations

850

return func

851

852

551

return decorator

853

552

854

553

855

554

class DBusPropertyException(dbus.exceptions.DBusException):

856

555

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

857

556

"""

858

pass

557

def __unicode__(self):

558

return unicode(str(self))

859

559

860

560

861

561

class DBusPropertyAccessException(DBusPropertyException):

872

572

873

573

class DBusObjectWithProperties(dbus.service.Object):

874

574

"""A D-Bus object with properties.

875

575

876

576

Classes inheriting from this can use the dbus_service_property

877

577

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

878

578

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

879

579

"""

880

580

881

581

@staticmethod

882

def _is_dbus_thing(thing):

883

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

884

885

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

886

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

887

"""

888

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

889

False)

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

890

584

891

def _get_all_dbus_things(self, thing):

585

def _get_all_dbus_properties(self):

892

586

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

893

587

"""

894

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

895

athing.__get__(self))

896

for cls in self.__class__.__mro__

897

for name, athing in

898

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

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

899

591

900

592

def _get_dbus_property(self, interface_name, property_name):

901

593

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

902

594

property with the specified name and interface.

903

595

"""

904

for cls in self.__class__.__mro__:

905

for name, value in inspect.getmembers(

906

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

907

if (value._dbus_name == property_name

908

and value._dbus_interface == interface_name):

909

return value.__get__(self)

910

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

911

606

# No such property

912

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

913

self.dbus_object_path, interface_name, property_name))

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

914

610

915

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

in_signature="ss",

611

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

917

612

out_signature="v")

918

613

def Get(self, interface_name, property_name):

919

614

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

937

632

# The byte_arrays option is not supported yet on

938

633

# signatures other than "ay".

939

634

if prop._dbus_signature != "ay":

940

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

941

"'ay' signature {!r}"

942

.format(prop._dbus_signature))

943

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

944

for byte in value))

635

raise ValueError

636

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

637

for byte in value))

945

638

prop(value)

946

639

947

@dbus.service.method(dbus.PROPERTIES_IFACE,

948

in_signature="s",

640

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

949

641

out_signature="a{sv}")

950

642

def GetAll(self, interface_name):

951

643

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

952

644

standard.

953

645

954

646

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

955

647

"""

956

properties = {}

957

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

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

958

650

if (interface_name

959

651

and interface_name != prop._dbus_interface):

960

652

# Interface non-empty but did not match

964

656

continue

965

657

value = prop()

966

658

if not hasattr(value, "variant_level"):

967

properties[name] = value

659

all[name] = value

968

660

continue

969

properties[name] = type(value)(

970

value, variant_level = value.variant_level + 1)

971

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

972

973

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

974

def PropertiesChanged(self, interface_name, changed_properties,

975

invalidated_properties):

976

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

977

standard.

978

"""

979

pass

661

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

662

value.variant_level+1)

663

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

980

664

981

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

982

666

out_signature="s",

983

667

path_keyword='object_path',

984

668

connection_keyword='connection')

985

669

def Introspect(self, object_path, connection):

986

"""Overloading of standard D-Bus method.

987

988

Inserts property tags and interface annotation tags.

670

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

989

671

"""

990

672

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

991

673

connection)

992

674

try:

993

675

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

994

995

676

def make_tag(document, name, prop):

996

677

e = document.createElement("property")

997

678

e.setAttribute("name", name)

998

679

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

999

680

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

1000

681

return e

1001

1002

682

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

1003

# Add property tags

1004

683

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

1005

684

for name, prop

1006

in self._get_all_dbus_things("property")

685

in self._get_all_dbus_properties()

1007

686

if prop._dbus_interface

1008

687

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

1009

688

if_tag.appendChild(tag)

1010

# Add annotation tags

1011

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

1012

for tag in if_tag.getElementsByTagName(typ):

1013

annots = dict()

1014

for name, prop in (self.

1015

_get_all_dbus_things(typ)):

1016

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

1017

and prop._dbus_interface

1018

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

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

1021

for name, value in annots.items():

1022

ann_tag = document.createElement(

1023

"annotation")

1024

ann_tag.setAttribute("name", name)

1025

ann_tag.setAttribute("value", value)

1026

tag.appendChild(ann_tag)

1027

# Add interface annotation tags

1028

for annotation, value in dict(

1029

itertools.chain.from_iterable(

1030

annotations().items()

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

1033

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

1034

)).items():

1035

ann_tag = document.createElement("annotation")

1036

ann_tag.setAttribute("name", annotation)

1037

ann_tag.setAttribute("value", value)

1038

if_tag.appendChild(ann_tag)

1039

689

# Add the names to the return values for the

1040

690

# "org.freedesktop.DBus.Properties" methods

1041

691

if (if_tag.getAttribute("name")

1054

704

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

1055

705

document.unlink()

1056

706

except (AttributeError, xml.dom.DOMException,

1057

xml.parsers.expat.ExpatError) as error:

707

xml.parsers.expat.ExpatError), error:

1058

708

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

1059

exc_info=error)

709

error)

1060

710

return xmlstring

1061

711

1062

712

1063

def datetime_to_dbus(dt, variant_level=0):

1064

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

1065

if dt is None:

1066

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

1067

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

1068

1069

1070

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1071

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

1072

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

1073

interface names according to the "alt_interface_names" mapping.

1074

Usage:

1075

1076

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

1077

"net.example.AlternateInterface"})

1078

class SampleDBusObject(dbus.service.Object):

1079

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

1080

def SampleDBusMethod():

1081

pass

1082

1083

The above "SampleDBusMethod" on "SampleDBusObject" will be

1084

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

1085

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

1086

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

1087

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

1088

1089

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

1090

(from DBusObjectWithProperties) and interfaces (from the

1091

dbus_interface_annotations decorator).

1092

"""

1093

1094

def wrapper(cls):

1095

for orig_interface_name, alt_interface_name in (

1096

alt_interface_names.items()):

1097

attr = {}

1098

interface_names = set()

1099

# Go though all attributes of the class

1100

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

1101

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

1102

# with the wrong interface name

1103

if (not hasattr(attribute, "_dbus_interface")

1104

or not attribute._dbus_interface.startswith(

1105

orig_interface_name)):

1106

continue

1107

# Create an alternate D-Bus interface name based on

1108

# the current name

1109

alt_interface = attribute._dbus_interface.replace(

1110

orig_interface_name, alt_interface_name)

1111

interface_names.add(alt_interface)

1112

# Is this a D-Bus signal?

1113

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

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

# Create a new, but exactly alike, function

1121

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

1122

# with the alternate D-Bus interface name

1123

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1125

(types.FunctionType(

1126

nonmethod_func.func_code,

1127

nonmethod_func.func_globals,

1128

nonmethod_func.func_name,

1129

nonmethod_func.func_defaults,

1130

nonmethod_func.func_closure)))

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"})

1241

713

class ClientDBus(Client, DBusObjectWithProperties):

1242

714

"""A Client class using D-Bus

1243

715

1247

719

"""

1248

720

1249

721

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

722

+ ("dbus_object_path",))

1253

723

1254

724

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

1255

725

1256

726

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

727

self._approvals_pending = 0

1257

728

self.bus = bus

1258

729

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

1259

730

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

1260

731

# the D-Bus

1261

client_object_name = str(self.name).translate(

732

client_object_name = unicode(self.name).translate(

1262

733

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

1263

734

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

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

735

self.dbus_object_path = (dbus.ObjectPath

736

("/clients/" + client_object_name))

1266

737

DBusObjectWithProperties.__init__(self, self.bus,

1267

738

self.dbus_object_path)

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

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

1349

783

1350

784

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

1351

785

try:

1360

794

*args, **kwargs):

1361

795

self.checker_callback_tag = None

1362

796

self.checker = None

797

# Emit D-Bus signal

798

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

799

dbus.Boolean(False, variant_level=1))

1363

800

if os.WIFEXITED(condition):

1364

801

exitstatus = os.WEXITSTATUS(condition)

1365

802

# Emit D-Bus signal

1375

812

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

1376

813

*args, **kwargs)

1377

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

832

1378

833

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

1379

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

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

1380

839

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

1381

840

# Only if new checker process was started

1382

841

if (self.checker is not None

1383

842

and old_checker_pid != self.checker.pid):

1384

843

# Emit D-Bus signal

1385

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1386

848

return r

1387

849

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

1388

859

def _reset_approved(self):

1389

self.approved = None

860

self._approved = None

1390

861

return False

1391

862

1392

863

def approve(self, value=True):

1393

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1396

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

1397

870

1398

871

## D-Bus methods, signals & properties

1399

1400

## Interfaces

872

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

1401

873

1402

874

## Signals

1403

875

1414

886

pass

1415

887

1416

888

# PropertyChanged - signal

1417

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

1418

889

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

1419

890

def PropertyChanged(self, property, value):

1420

891

"D-Bus signal"

1451

922

# CheckedOK - method

1452

923

@dbus.service.method(_interface)

1453

924

def CheckedOK(self):

1454

self.checked_ok()

925

return self.checked_ok()

1455

926

1456

927

# Enable - method

1457

928

@dbus.service.method(_interface)

1484

955

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

1485

956

1486

957

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

958

@dbus_service_property(_interface, signature="b",

1489

959

access="readwrite")

1490

960

def ApprovedByDefault_dbus_property(self, value=None):

1491

961

if value is None: # get

1492

962

return dbus.Boolean(self.approved_by_default)

1493

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

1494

967

1495

968

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

969

@dbus_service_property(_interface, signature="t",

1498

970

access="readwrite")

1499

971

def ApprovalDelay_dbus_property(self, value=None):

1500

972

if value is None: # get

1501

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

1502

* 1000)

973

return dbus.UInt64(self.approval_delay_milliseconds())

1503

974

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))

1504

978

1505

979

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

980

@dbus_service_property(_interface, signature="t",

1508

981

access="readwrite")

1509

982

def ApprovalDuration_dbus_property(self, value=None):

1510

983

if value is None: # get

1511

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

1512

* 1000)

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

1513

986

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))

1514

990

1515

991

# Name - property

1516

992

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

1523

999

return dbus.String(self.fingerprint)

1524

1000

1525

1001

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1002

@dbus_service_property(_interface, signature="s",

1528

1003

access="readwrite")

1529

1004

def Host_dbus_property(self, value=None):

1530

1005

if value is None: # get

1531

1006

return dbus.String(self.host)

1532

self.host = str(value)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1533

1011

1534

1012

# Created - property

1535

1013

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

1536

1014

def Created_dbus_property(self):

1537

return datetime_to_dbus(self.created)

1015

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

1538

1016

1539

1017

# LastEnabled - property

1540

1018

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

1541

1019

def LastEnabled_dbus_property(self):

1542

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1543

1023

1544

1024

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1025

@dbus_service_property(_interface, signature="b",

1547

1026

access="readwrite")

1548

1027

def Enabled_dbus_property(self, value=None):

1549

1028

if value is None: # get

1554

1033

self.disable()

1555

1034

1556

1035

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1036

@dbus_service_property(_interface, signature="s",

1559

1037

access="readwrite")

1560

1038

def LastCheckedOK_dbus_property(self, value=None):

1561

1039

if value is not None:

1562

1040

self.checked_ok()

1563

1041

return

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)

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))

1575

1046

1576

1047

# LastApprovalRequest - property

1577

1048

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

1578

1049

def LastApprovalRequest_dbus_property(self):

1579

return datetime_to_dbus(self.last_approval_request)

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))

1580

1055

1581

1056

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1057

@dbus_service_property(_interface, signature="t",

1584

1058

access="readwrite")

1585

1059

def Timeout_dbus_property(self, value=None):

1586

1060

if value is None: # get

1587

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

1588

old_timeout = self.timeout

1061

return dbus.UInt64(self.timeout_milliseconds())

1589

1062

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

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)

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))

1615

1083

1616

1084

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1085

@dbus_service_property(_interface, signature="t",

1619

1086

access="readwrite")

1620

1087

def Interval_dbus_property(self, value=None):

1621

1088

if value is None: # get

1622

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

1089

return dbus.UInt64(self.interval_milliseconds())

1623

1090

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))

1624

1094

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

1625

1095

return

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

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

1633

1102

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1103

@dbus_service_property(_interface, signature="s",

1636

1104

access="readwrite")

1637

1105

def Checker_dbus_property(self, value=None):

1638

1106

if value is None: # get

1639

1107

return dbus.String(self.checker_command)

1640

self.checker_command = str(value)

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))

1641

1113

1642

1114

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1115

@dbus_service_property(_interface, signature="b",

1645

1116

access="readwrite")

1646

1117

def CheckerRunning_dbus_property(self, value=None):

1647

1118

if value is None: # get

1657

1128

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1129

1659

1130

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

1664

1133

def Secret_dbus_property(self, value):

1665

self.secret = bytes(value)

1134

self.secret = str(value)

1666

1135

1667

1136

del _interface

1668

1137

1672

1141

self._pipe = child_pipe

1673

1142

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

1674

1143

if not self._pipe.recv():

1675

raise KeyError(fpr)

1676

1144

raise KeyError()

1145

1677

1146

def __getattribute__(self, name):

1678

if name == '_pipe':

1147

if(name == '_pipe'):

1679

1148

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

1680

1149

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

1681

1150

data = self._pipe.recv()

1682

1151

if data[0] == 'data':

1683

1152

return data[1]

1684

1153

if data[0] == 'function':

1685

1686

1154

def func(*args, **kwargs):

1687

1155

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

1688

1156

return self._pipe.recv()[1]

1689

1690

1157

return func

1691

1158

1692

1159

def __setattr__(self, name, value):

1693

if name == '_pipe':

1160

if(name == '_pipe'):

1694

1161

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

1695

1162

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

1696

1163

1704

1171

def handle(self):

1705

1172

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

1706

1173

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

1707

str(self.client_address))

1174

unicode(self.client_address))

1708

1175

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

1709

1176

self.server.child_pipe.fileno())

1710

1711

session = gnutls.connection.ClientSession(

1712

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

1713

1177

1178

session = (gnutls.connection

1179

.ClientSession(self.request,

1180

gnutls.connection

1181

.X509Credentials()))

1182

1714

1183

# Note: gnutls.connection.X509Credentials is really a

1715

1184

# generic GnuTLS certificate credentials object so long as

1716

1185

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

1717

1186

# here despite using OpenPGP certificates.

1718

1187

1719

1188

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

1720

1189

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

1721

1190

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

1724

1193

priority = self.server.gnutls_priority

1725

1194

if priority is None:

1726

1195

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1729

1196

(gnutls.library.functions

1197

.gnutls_priority_set_direct(session._c_object,

1198

priority, None))

1199

1730

1200

# Start communication using the Mandos protocol

1731

1201

# Get protocol number

1732

1202

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

1733

1203

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

1734

1204

try:

1735

1205

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

1736

raise RuntimeError(line)

1737

except (ValueError, IndexError, RuntimeError) as error:

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1738

1208

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

1739

1209

return

1740

1210

1741

1211

# Start GnuTLS connection

1742

1212

try:

1743

1213

session.handshake()

1744

except gnutls.errors.GNUTLSError as error:

1214

except gnutls.errors.GNUTLSError, error:

1745

1215

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

1746

1216

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

1747

1217

# established. Just abandon the request.

1748

1218

return

1749

1219

logger.debug("Handshake succeeded")

1750

1220

1751

1221

approval_required = False

1752

1222

try:

1753

1223

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

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

1758

1227

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

1759

1228

return

1760

1229

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

1761

1230

1762

1231

try:

1763

1232

client = ProxyClient(child_pipe, fpr,

1764

1233

self.client_address)

1772

1241

1773

1242

while True:

1774

1243

if not client.enabled:

1775

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

1776

client.name)

1244

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

1245

client.name)

1777

1246

if self.server.use_dbus:

1778

1247

# Emit D-Bus signal

1779

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

1780

1249

return

1781

1250

1782

if client.approved or not client.approval_delay:

1251

if client._approved or not client.approval_delay:

1783

1252

#We are approved or approval is disabled

1784

1253

break

1785

elif client.approved is None:

1254

elif client._approved is None:

1786

1255

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

1787

1256

client.name)

1788

1257

if self.server.use_dbus:

1789

1258

# Emit D-Bus signal

1790

1259

client.NeedApproval(

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

1793

1262

else:

1794

1263

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

1795

1264

client.name)

1799

1268

return

1800

1269

1801

1270

#wait until timeout or approved

1271

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

1802

1272

time = datetime.datetime.now()

1803

1273

client.changedstate.acquire()

1804

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

1274

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

1805

1275

client.changedstate.release()

1806

1276

time2 = datetime.datetime.now()

1807

1277

if (time2 - time) >= delay:

1822

1292

while sent_size < len(client.secret):

1823

1293

try:

1824

1294

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

1825

except gnutls.errors.GNUTLSError as error:

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1828

1297

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1298

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

1299

sent, len(client.secret)

1300

- (sent_size + sent))

1832

1301

sent_size += sent

1833

1302

1834

1303

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

1835

# bump the timeout using extended_timeout

1836

client.bump_timeout(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

1837

1306

if self.server.use_dbus:

1838

1307

# Emit D-Bus signal

1839

1308

client.GotSecret()

1843

1312

client.approvals_pending -= 1

1844

1313

try:

1845

1314

session.bye()

1846

except gnutls.errors.GNUTLSError as error:

1847

logger.warning("GnuTLS bye failed",

1848

exc_info=error)

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1849

1317

1850

1318

@staticmethod

1851

1319

def peer_certificate(session):

1852

1320

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

1853

1321

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1322

if (gnutls.library.functions

1323

.gnutls_certificate_type_get(session._c_object)

1856

1324

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1325

# ...do the normal thing

1858

1326

return session.peer_certificate

1872

1340

def fingerprint(openpgp):

1873

1341

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1342

# New GnuTLS "datum" with the OpenPGP public key

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)))

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))))

1879

1348

# New empty GnuTLS certificate

1880

1349

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1350

(gnutls.library.functions

1351

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1352

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1353

(gnutls.library.functions

1354

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

1355

gnutls.library.constants

1356

.GNUTLS_OPENPGP_FMT_RAW))

1887

1357

# Verify the self signature in the key

1888

1358

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1359

(gnutls.library.functions

1360

.gnutls_openpgp_crt_verify_self(crt, 0,

1361

ctypes.byref(crtverify)))

1891

1362

if crtverify.value != 0:

1892

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1364

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

1895

1366

# New buffer for the fingerprint

1896

1367

buf = ctypes.create_string_buffer(20)

1897

1368

buf_len = ctypes.c_size_t()

1898

1369

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1370

(gnutls.library.functions

1371

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

1372

ctypes.byref(buf_len)))

1901

1373

# Deinit the certificate

1902

1374

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1375

# Convert the buffer to a Python bytestring

1904

1376

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

1905

1377

# Convert the bytestring to hexadecimal notation

1906

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

1378

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

1907

1379

return hex_fpr

1908

1380

1909

1381

1910

1382

class MultiprocessingMixIn(object):

1911

1383

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

1912

1913

1384

def sub_process_main(self, request, address):

1914

1385

try:

1915

1386

self.finish_request(request, address)

1916

except Exception:

1387

except:

1917

1388

self.handle_error(request, address)

1918

1389

self.close_request(request)

1919

1390

1920

1391

def process_request(self, request, address):

1921

1392

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

1922

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

1923

args = (request, address))

1924

proc.start()

1925

return proc

1926

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1927

1395

1928

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1397

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

1930

1931

1398

def process_request(self, request, client_address):

1932

1399

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

1933

1400

1934

1401

This function creates a new pipe in self.pipe

1935

1402

"""

1936

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1937

1938

proc = MultiprocessingMixIn.process_request(self, request,

1939

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1940

1407

self.child_pipe.close()

1941

self.add_pipe(parent_pipe, proc)

1942

1943

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1944

1411

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

1945

raise NotImplementedError()

1946

1412

raise NotImplementedError

1947

1413

1948

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1949

1415

socketserver.TCPServer, object):

1954

1420

interface: None or a network interface name (string)

1955

1421

use_ipv6: Boolean; to use IPv6 or not

1956

1422

"""

1957

1958

1423

def __init__(self, server_address, RequestHandlerClass,

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

"""

1424

interface=None, use_ipv6=True):

1965

1425

self.interface = interface

1966

1426

if use_ipv6:

1967

1427

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.

1994

1428

socketserver.TCPServer.__init__(self, server_address,

1995

1429

RequestHandlerClass)

1996

1997

1430

def server_bind(self):

1998

1431

"""This overrides the normal server_bind() function

1999

1432

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

2005

1438

self.interface)

2006

1439

else:

2007

1440

try:

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:

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:

2016

1451

logger.error("SO_BINDTODEVICE not available;"

2017

1452

" cannot bind to interface %s",

2018

1453

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

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

2021

" cannot bind", self.interface)

2022

1454

else:

2023

1455

raise

2024

1456

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

2027

1459

if self.address_family == socket.AF_INET6:

2028

1460

any_address = "::" # in6addr_any

2029

1461

else:

2030

any_address = "0.0.0.0" # INADDR_ANY

1462

any_address = socket.INADDR_ANY

2031

1463

self.server_address = (any_address,

2032

1464

self.server_address[1])

2033

1465

elif not self.server_address[1]:

2034

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

1466

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

1467

0)

2035

1468

# if self.interface:

2036

1469

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

2037

1470

# 0, # port

2051

1484

2052

1485

Assumes a gobject.MainLoop event loop.

2053

1486

"""

2054

2055

1487

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

1488

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

1489

gnutls_priority=None, use_dbus=True):

2062

1490

self.enabled = False

2063

1491

self.clients = clients

2064

1492

if self.clients is None:

2065

self.clients = {}

1493

self.clients = set()

2066

1494

self.use_dbus = use_dbus

2067

1495

self.gnutls_priority = gnutls_priority

2068

1496

IPv6_TCPServer.__init__(self, server_address,

2069

1497

RequestHandlerClass,

2070

1498

interface = interface,

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

1499

use_ipv6 = use_ipv6)

2074

1500

def server_activate(self):

2075

1501

if self.enabled:

2076

1502

return socketserver.TCPServer.server_activate(self)

2077

2078

1503

def enable(self):

2079

1504

self.enabled = True

2080

2081

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

2082

1506

# Call "handle_ipc" for both data and EOF events

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,

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,

2093

1513

client_object=None):

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()

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):

2098

1530

return False

2099

1531

2100

1532

# Read a request from the child

2105

1537

fpr = request[1]

2106

1538

address = request[2]

2107

1539

2108

for c in self.clients.itervalues():

1540

for c in self.clients:

2109

1541

if c.fingerprint == fpr:

2110

1542

client = c

2111

1543

break

2112

1544

else:

2113

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

2114

"dress: %s", fpr, address)

1545

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

1546

"dress: %s", fpr, address)

2115

1547

if self.use_dbus:

2116

1548

# Emit D-Bus signal

2117

mandos_dbus_service.ClientNotFound(fpr,

2118

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2119

1550

parent_pipe.send(False)

2120

1551

return False

2121

1552

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))

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))

2129

1558

parent_pipe.send(True)

2130

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

2131

# same fileno

1559

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

2132

1560

return False

2133

1561

if command == 'funcall':

2134

1562

funcname = request[1]

2135

1563

args = request[2]

2136

1564

kwargs = request[3]

2137

1565

2138

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

2139

funcname)(*args,

2140

**kwargs)))

2141

1566

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

1567

2142

1568

if command == 'getattr':

2143

1569

attrname = request[1]

2144

1570

if callable(client_object.__getattribute__(attrname)):

2145

parent_pipe.send(('function', ))

1571

parent_pipe.send(('function',))

2146

1572

else:

2147

parent_pipe.send((

2148

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

1573

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

2149

1574

2150

1575

if command == 'setattr':

2151

1576

attrname = request[1]

2152

1577

value = request[2]

2153

1578

setattr(client_object, attrname, value)

2154

1579

2155

1580

return True

2156

1581

2157

1582

2158

def rfc3339_duration_to_delta(duration):

2159

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

2160

2161

>>> rfc3339_duration_to_delta("P7D")

2162

datetime.timedelta(7)

2163

>>> rfc3339_duration_to_delta("PT60S")

2164

datetime.timedelta(0, 60)

2165

>>> rfc3339_duration_to_delta("PT60M")

2166

datetime.timedelta(0, 3600)

2167

>>> rfc3339_duration_to_delta("PT24H")

2168

datetime.timedelta(1)

2169

>>> rfc3339_duration_to_delta("P1W")

2170

datetime.timedelta(7)

2171

>>> rfc3339_duration_to_delta("PT5M30S")

2172

datetime.timedelta(0, 330)

2173

>>> rfc3339_duration_to_delta("P1DT3M20S")

2174

datetime.timedelta(1, 200)

2175

"""

2176

2177

# Parsing an RFC 3339 duration with regular expressions is not

2178

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

2179

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

2180

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

2181

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

2182

# avoid excessive use of external libraries.

2183

2184

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

2185

Token = collections.namedtuple("Token",

2186

("regexp", # To match token; if

2187

# "value" is not None,

2188

# must have a "group"

2189

# containing digits

2190

"value", # datetime.timedelta or

2191

# None

2192

"followers")) # Tokens valid after

2193

# this token

2194

Token = collections.namedtuple("Token", (

2195

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

2196

# a "group" containing digits

2197

"value", # datetime.timedelta or None

2198

"followers")) # Tokens valid after this token

2199

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

2200

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

2201

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

2202

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

2203

datetime.timedelta(seconds=1),

2204

frozenset((token_end, )))

2205

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

2206

datetime.timedelta(minutes=1),

2207

frozenset((token_second, token_end)))

2208

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

2209

datetime.timedelta(hours=1),

2210

frozenset((token_minute, token_end)))

2211

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

2212

None,

2213

frozenset((token_hour, token_minute,

2214

token_second)))

2215

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

2216

datetime.timedelta(days=1),

2217

frozenset((token_time, token_end)))

2218

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

2219

datetime.timedelta(weeks=4),

2220

frozenset((token_day, token_end)))

2221

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

2222

datetime.timedelta(weeks=52),

2223

frozenset((token_month, token_end)))

2224

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

2225

datetime.timedelta(weeks=1),

2226

frozenset((token_end, )))

2227

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

2228

frozenset((token_year, token_month,

2229

token_day, token_time,

2230

token_week)))

2231

# Define starting values

2232

value = datetime.timedelta() # Value so far

2233

found_token = None

2234

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

2235

s = duration # String left to parse

2236

# Loop until end token is found

2237

while found_token is not token_end:

2238

# Search for any currently valid tokens

2239

for token in followers:

2240

match = token.regexp.match(s)

2241

if match is not None:

2242

# Token found

2243

if token.value is not None:

2244

# Value found, parse digits

2245

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

2246

# Add to value so far

2247

value += factor * token.value

2248

# Strip token from string

2249

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

2250

# Go to found token

2251

found_token = token

2252

# Set valid next tokens

2253

followers = found_token.followers

2254

break

2255

else:

2256

# No currently valid tokens were found

2257

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

2258

.format(duration))

2259

# End token found

2260

return value

2261

2262

2263

1583

def string_to_delta(interval):

2264

1584

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

2265

1585

2276

1596

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

2277

1597

datetime.timedelta(0, 330)

2278

1598

"""

2279

2280

try:

2281

return rfc3339_duration_to_delta(interval)

2282

except ValueError:

2283

pass

2284

2285

1599

timevalue = datetime.timedelta(0)

2286

1600

for s in interval.split():

2287

1601

try:

2288

suffix = s[-1]

1602

suffix = unicode(s[-1])

2289

1603

value = int(s[:-1])

2290

1604

if suffix == "d":

2291

1605

delta = datetime.timedelta(value)

2298

1612

elif suffix == "w":

2299

1613

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

2300

1614

else:

2301

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

2302

except IndexError as e:

1615

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

1616

except (ValueError, IndexError), e:

2303

1617

raise ValueError(*(e.args))

2304

1618

timevalue += delta

2305

1619

return timevalue

2306

1620

2307

1621

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

2308

1646

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

2309

1647

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

2310

1648

2318

1656

sys.exit()

2319

1657

if not noclose:

2320

1658

# Close all standard open file descriptors

2321

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

1659

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

2322

1660

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

2323

1661

raise OSError(errno.ENODEV,

2324

"{} not a character device"

2325

.format(os.devnull))

1662

"%s not a character device"

1663

% os.path.devnull)

2326

1664

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

2327

1665

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

2328

1666

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

2335

1673

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

2336

1674

# Parsing of options, both command line and config file

2337

1675

2338

parser = argparse.ArgumentParser()

2339

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

2340

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

2341

help="show version number and exit")

2342

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

2343

help="Bind to interface IF")

2344

parser.add_argument("-a", "--address",

2345

help="Address to listen for requests on")

2346

parser.add_argument("-p", "--port", type=int,

2347

help="Port number to receive requests on")

2348

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

2349

help="Run self-test")

2350

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

2351

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

2352

" to terminal", default=None)

2353

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

2354

help="Debug level for stdout output")

2355

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

2356

" priority string (see GnuTLS documentation)")

2357

parser.add_argument("--servicename",

2358

metavar="NAME", help="Zeroconf service name")

2359

parser.add_argument("--configdir",

2360

default="/etc/mandos", metavar="DIR",

2361

help="Directory to search for configuration"

2362

" files")

2363

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

2364

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

2365

" system bus interface", default=None)

2366

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

2367

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

2368

default=None)

2369

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

2370

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

2371

" state", default=None)

2372

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

2373

help="Specify a file descriptor to a network"

2374

" socket to use instead of creating one")

2375

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

2376

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

2377

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

2378

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

2379

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

2380

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

2381

default=None)

2382

2383

options = parser.parse_args()

1676

parser = optparse.OptionParser(version = "%%prog %s" % version)

1677

parser.add_option("-i", "--interface", type="string",

1678

metavar="IF", help="Bind to interface IF")

1679

parser.add_option("-a", "--address", type="string",

1680

help="Address to listen for requests on")

1681

parser.add_option("-p", "--port", type="int",

1682

help="Port number to receive requests on")

1683

parser.add_option("--check", action="store_true",

1684

help="Run self-test")

1685

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

1686

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

1687

" terminal")

1688

parser.add_option("--debuglevel", type="string", metavar="LEVEL",

1689

help="Debug level for stdout output")

1690

parser.add_option("--priority", type="string", help="GnuTLS"

1691

" priority string (see GnuTLS documentation)")

1692

parser.add_option("--servicename", type="string",

1693

metavar="NAME", help="Zeroconf service name")

1694

parser.add_option("--configdir", type="string",

1695

default="/etc/mandos", metavar="DIR",

1696

help="Directory to search for configuration"

1697

" files")

1698

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

1699

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

1700

" system bus interface")

1701

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

1702

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

1703

options = parser.parse_args()[0]

2384

1704

2385

1705

if options.check:

2386

1706

import doctest

2387

fail_count, test_count = doctest.testmod()

2388

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

1707

doctest.testmod()

1708

sys.exit()

2389

1709

2390

1710

# Default values for config file for server-global settings

2391

1711

server_defaults = { "interface": "",

2393

1713

"port": "",

2394

1714

"debug": "False",

2395

1715

"priority":

2396

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

2397

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

1716

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

2398

1717

"servicename": "Mandos",

2399

1718

"use_dbus": "True",

2400

1719

"use_ipv6": "True",

2401

1720

"debuglevel": "",

2402

"restore": "True",

2403

"socket": "",

2404

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

2405

"foreground": "False",

2406

"zeroconf": "True",

2407

}

1721

}

2408

1722

2409

1723

# Parse config file for server-global settings

2410

1724

server_config = configparser.SafeConfigParser(server_defaults)

2411

1725

del server_defaults

2412

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

1726

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

1727

"mandos.conf"))

2413

1728

# Convert the SafeConfigParser object to a dict

2414

1729

server_settings = server_config.defaults()

2415

1730

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

2416

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

1731

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

2417

1732

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

2418

1733

option)

2419

1734

if server_settings["port"]:

2420

1735

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

2421

1736

"port")

2422

if server_settings["socket"]:

2423

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

2424

"socket")

2425

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

2426

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

2427

# happen with a supplied network socket.

2428

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

2429

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

2430

["socket"])

2431

1737

del server_config

2432

1738

2433

1739

# Override the settings from the config file with command line

2434

1740

# options, if set.

2435

1741

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

2436

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

2437

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

2438

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

1742

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

1743

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

2439

1744

value = getattr(options, option)

2440

1745

if value is not None:

2441

1746

server_settings[option] = value

2442

1747

del options

2443

1748

# Force all strings to be unicode

2444

1749

for option in server_settings.keys():

2445

if isinstance(server_settings[option], bytes):

2446

server_settings[option] = (server_settings[option]

2447

.decode("utf-8"))

2448

# Force all boolean options to be boolean

2449

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

2450

"foreground", "zeroconf"):

2451

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

2452

# Debug implies foreground

2453

if server_settings["debug"]:

2454

server_settings["foreground"] = True

1750

if type(server_settings[option]) is str:

1751

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

2455

1752

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

2456

1753

2457

1754

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

2458

1755

2459

if (not server_settings["zeroconf"]

2460

and not (server_settings["port"]

2461

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

2462

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

2463

2464

1756

# For convenience

2465

1757

debug = server_settings["debug"]

2466

1758

debuglevel = server_settings["debuglevel"]

2467

1759

use_dbus = server_settings["use_dbus"]

2468

1760

use_ipv6 = server_settings["use_ipv6"]

2469

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

2470

stored_state_file)

2471

foreground = server_settings["foreground"]

2472

zeroconf = server_settings["zeroconf"]

2473

2474

if debug:

2475

initlogger(debug, logging.DEBUG)

2476

else:

2477

if not debuglevel:

2478

initlogger(debug)

2479

else:

2480

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

2481

initlogger(debug, level)

2482

1761

2483

1762

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

2484

syslogger.setFormatter(

2485

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

2486

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

2487

server_settings["servicename"])))

1763

syslogger.setFormatter(logging.Formatter

1764

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

1765

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

1766

% server_settings["servicename"]))

2488

1767

2489

1768

# Parse config file with clients

2490

client_config = configparser.SafeConfigParser(Client

2491

.client_defaults)

1769

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

1770

"interval": "5m",

1771

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

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1775

}

1776

client_config = configparser.SafeConfigParser(client_defaults)

2492

1777

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

2493

1778

"clients.conf"))

2494

1779

2495

1780

global mandos_dbus_service

2496

1781

mandos_dbus_service = None

2497

1782

2498

socketfd = None

2499

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

2500

socketfd = server_settings["socket"]

2501

tcp_server = MandosServer(

2502

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

2503

ClientHandler,

2504

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

2505

use_ipv6=use_ipv6,

2506

gnutls_priority=server_settings["priority"],

2507

use_dbus=use_dbus,

2508

socketfd=socketfd)

2509

if not foreground:

2510

pidfilename = "/run/mandos.pid"

2511

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

2512

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

2513

pidfile = None

1783

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

1784

server_settings["port"]),

1785

ClientHandler,

1786

interface=(server_settings["interface"]

1787

or None),

1788

use_ipv6=use_ipv6,

1789

gnutls_priority=

1790

server_settings["priority"],

1791

use_dbus=use_dbus)

1792

if not debug:

1793

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

2514

1794

try:

2515

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

2516

except IOError as e:

2517

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

2518

exc_info=e)

1795

pidfile = open(pidfilename, "w")

1796

except IOError:

1797

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

2519

1798

2520

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

1799

try:

1800

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

1801

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

1802

except KeyError:

2521

1803

try:

2522

uid = pwd.getpwnam(name).pw_uid

2523

gid = pwd.getpwnam(name).pw_gid

2524

break

1804

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

1805

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

2525

1806

except KeyError:

2526

continue

2527

else:

2528

uid = 65534

2529

gid = 65534

1807

try:

1808

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

1809

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

1810

except KeyError:

1811

uid = 65534

1812

gid = 65534

2530

1813

try:

2531

1814

os.setgid(gid)

2532

1815

os.setuid(uid)

2533

except OSError as error:

2534

if error.errno != errno.EPERM:

2535

raise

1816

except OSError, error:

1817

if error[0] != errno.EPERM:

1818

raise error

2536

1819

1820

if not debug and not debuglevel:

1821

syslogger.setLevel(logging.WARNING)

1822

console.setLevel(logging.WARNING)

1823

if debuglevel:

1824

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

1825

syslogger.setLevel(level)

1826

console.setLevel(level)

1827

2537

1828

if debug:

2538

1829

# Enable all possible GnuTLS debugging

2539

1830

2545

1836

def debug_gnutls(level, string):

2546

1837

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

2547

1838

2548

gnutls.library.functions.gnutls_global_set_log_function(

2549

debug_gnutls)

1839

(gnutls.library.functions

1840

.gnutls_global_set_log_function(debug_gnutls))

2550

1841

2551

1842

# Redirect stdin so all checkers get /dev/null

2552

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

1843

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

2553

1844

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

2554

1845

if null > 2:

2555

1846

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

2556

1850

2557

1851

# Need to fork before connecting to D-Bus

2558

if not foreground:

1852

if not debug:

2559

1853

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

2560

1854

daemon()

2561

1855

2562

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

2563

# need to inform gobject that threads will be used.

2564

gobject.threads_init()

2565

2566

1856

global main_loop

2567

1857

# From the Avahi example code

2568

DBusGMainLoop(set_as_default=True)

1858

DBusGMainLoop(set_as_default=True )

2569

1859

main_loop = gobject.MainLoop()

2570

1860

bus = dbus.SystemBus()

2571

1861

# End of Avahi example code

2572

1862

if use_dbus:

2573

1863

try:

2574

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

2575

bus,

2576

do_not_queue=True)

2577

old_bus_name = dbus.service.BusName(

2578

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

2579

do_not_queue=True)

2580

except dbus.exceptions.DBusException as e:

2581

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

1864

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

1865

bus, do_not_queue=True)

1866

except dbus.exceptions.NameExistsException, e:

1867

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

2582

1868

use_dbus = False

2583

1869

server_settings["use_dbus"] = False

2584

1870

tcp_server.use_dbus = False

2585

if zeroconf:

2586

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2587

service = AvahiServiceToSyslog(

2588

name = server_settings["servicename"],

2589

servicetype = "_mandos._tcp",

2590

protocol = protocol,

2591

bus = bus)

2592

if server_settings["interface"]:

2593

service.interface = if_nametoindex(

2594

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

1871

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1872

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

1873

servicetype = "_mandos._tcp",

1874

protocol = protocol, bus = bus)

1875

if server_settings["interface"]:

1876

service.interface = (if_nametoindex

1877

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

2595

1878

2596

1879

global multiprocessing_manager

2597

1880

multiprocessing_manager = multiprocessing.Manager()

2599

1882

client_class = Client

2600

1883

if use_dbus:

2601

1884

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

2602

2603

client_settings = Client.config_parser(client_config)

2604

old_client_settings = {}

2605

clients_data = {}

2606

2607

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

2608

global wnull

2609

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

2610

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

2611

# mode

2612

if debug or not foreground:

2613

wnull.close()

2614

2615

# Get client data and settings from last running state.

2616

if server_settings["restore"]:

2617

try:

2618

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

2619

clients_data, old_client_settings = pickle.load(

2620

stored_state)

2621

os.remove(stored_state_path)

2622

except IOError as e:

2623

if e.errno == errno.ENOENT:

2624

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

2625

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

2626

else:

2627

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

2628

exc_info=e)

2629

raise

2630

except EOFError as e:

2631

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

2632

"EOFError:",

2633

exc_info=e)

2634

2635

with PGPEngine() as pgp:

2636

for client_name, client in clients_data.items():

2637

# Skip removed clients

2638

if client_name not in client_settings:

2639

continue

2640

2641

# Decide which value to use after restoring saved state.

2642

# We have three different values: Old config file,

2643

# new config file, and saved state.

2644

# New config value takes precedence if it differs from old

2645

# config value, otherwise use saved state.

2646

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

2647

try:

2648

# For each value in new config, check if it

2649

# differs from the old config value (Except for

2650

# the "secret" attribute)

2651

if (name != "secret"

2652

and (value !=

2653

old_client_settings[client_name][name])):

2654

client[name] = value

2655

except KeyError:

2656

pass

2657

2658

# Clients who has passed its expire date can still be

2659

# enabled if its last checker was successful. Clients

2660

# whose checker succeeded before we stored its state is

2661

# assumed to have successfully run all checkers during

2662

# downtime.

2663

if client["enabled"]:

2664

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

2665

if not client["last_checked_ok"]:

2666

logger.warning(

2667

"disabling client {} - Client never "

2668

"performed a successful checker".format(

2669

client_name))

2670

client["enabled"] = False

2671

elif client["last_checker_status"] != 0:

2672

logger.warning(

2673

"disabling client {} - Client last"

2674

" checker failed with error code"

2675

" {}".format(

2676

client_name,

2677

client["last_checker_status"]))

2678

client["enabled"] = False

2679

else:

2680

client["expires"] = (

2681

datetime.datetime.utcnow()

2682

+ client["timeout"])

2683

logger.debug("Last checker succeeded,"

2684

" keeping {} enabled".format(

2685

client_name))

1885

def client_config_items(config, section):

1886

special_settings = {

1887

"approved_by_default":

1888

lambda: config.getboolean(section,

1889

"approved_by_default"),

1890

}

1891

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

2686

1892

try:

2687

client["secret"] = pgp.decrypt(

2688

client["encrypted_secret"],

2689

client_settings[client_name]["secret"])

2690

except PGPError:

2691

# If decryption fails, we use secret from new settings

2692

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

2693

client_name))

2694

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

2695

["secret"])

2696

2697

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

2698

for client_name in (set(old_client_settings)

2699

- set(client_settings)):

2700

del clients_data[client_name]

2701

for client_name in (set(client_settings)

2702

- set(old_client_settings)):

2703

clients_data[client_name] = client_settings[client_name]

2704

2705

# Create all client objects

2706

for client_name, client in clients_data.items():

2707

tcp_server.clients[client_name] = client_class(

2708

name = client_name,

2709

settings = client,

2710

server_settings = server_settings)

2711

1893

yield (name, special_settings[name]())

1894

except KeyError:

1895

yield (name, value)

1896

1897

tcp_server.clients.update(set(

1898

client_class(name = section,

1899

config= dict(client_config_items(

1900

client_config, section)))

1901

for section in client_config.sections()))

2712

1902

if not tcp_server.clients:

2713

1903

logger.warning("No clients defined")

2714

2715

if not foreground:

2716

if pidfile is not None:

2717

pid = os.getpid()

2718

try:

2719

with pidfile:

2720

print(pid, file=pidfile)

2721

except IOError:

2722

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

2723

pidfilename, pid)

2724

del pidfile

1904

1905

if not debug:

1906

try:

1907

with pidfile:

1908

pid = os.getpid()

1909

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

1910

del pidfile

1911

except IOError:

1912

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

1913

pidfilename, pid)

1914

except NameError:

1915

# "pidfile" was never created

1916

pass

2725

1917

del pidfilename

2726

1918

1919

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

1920

2727

1921

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

2728

1922

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

2729

1923

2730

1924

if use_dbus:

2731

2732

@alternate_dbus_interfaces(

2733

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

2734

class MandosDBusService(DBusObjectWithProperties):

1925

class MandosDBusService(dbus.service.Object):

2735

1926

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

2736

2737

1927

def __init__(self):

2738

1928

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

2739

2740

_interface = "se.recompile.Mandos"

2741

2742

@dbus_interface_annotations(_interface)

2743

def _foo(self):

2744

return {

2745

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

2746

"false" }

1929

_interface = "se.bsnet.fukt.Mandos"

2747

1930

2748

1931

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

2749

1932

def ClientAdded(self, objpath):

2763

1946

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

2764

1947

def GetAllClients(self):

2765

1948

"D-Bus method"

2766

return dbus.Array(c.dbus_object_path for c in

2767

tcp_server.clients.itervalues())

1949

return dbus.Array(c.dbus_object_path

1950

for c in tcp_server.clients)

2768

1951

2769

1952

@dbus.service.method(_interface,

2770

1953

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

2771

1954

def GetAllClientsWithProperties(self):

2772

1955

"D-Bus method"

2773

1956

return dbus.Dictionary(

2774

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

2775

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

1957

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

1958

for c in tcp_server.clients),

2776

1959

signature="oa{sv}")

2777

1960

2778

1961

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

2779

1962

def RemoveClient(self, object_path):

2780

1963

"D-Bus method"

2781

for c in tcp_server.clients.itervalues():

1964

for c in tcp_server.clients:

2782

1965

if c.dbus_object_path == object_path:

2783

del tcp_server.clients[c.name]

1966

tcp_server.clients.remove(c)

2784

1967

c.remove_from_connection()

2785

1968

# Don't signal anything except ClientRemoved

2786

1969

c.disable(quiet=True)

2795

1978

2796

1979

def cleanup():

2797

1980

"Cleanup function; run on exit"

2798

if zeroconf:

2799

service.cleanup()

2800

2801

multiprocessing.active_children()

2802

wnull.close()

2803

if not (tcp_server.clients or client_settings):

2804

return

2805

2806

# Store client before exiting. Secrets are encrypted with key

2807

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

2808

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

2809

clients = {}

2810

with PGPEngine() as pgp:

2811

for client in tcp_server.clients.itervalues():

2812

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

2813

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

2814

key)

2815

client_dict = {}

2816

2817

# A list of attributes that can not be pickled

2818

# + secret.

2819

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

2820

"checker", "server_settings" }

2821

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

2822

.Object):

2823

exclude.add(name)

2824

2825

client_dict["encrypted_secret"] = (client

2826

.encrypted_secret)

2827

for attr in client.client_structure:

2828

if attr not in exclude:

2829

client_dict[attr] = getattr(client, attr)

2830

2831

clients[client.name] = client_dict

2832

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

2833

2834

try:

2835

with tempfile.NamedTemporaryFile(

2836

mode='wb',

2837

suffix=".pickle",

2838

prefix='clients-',

2839

dir=os.path.dirname(stored_state_path),

2840

delete=False) as stored_state:

2841

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

2842

tempname = stored_state.name

2843

os.rename(tempname, stored_state_path)

2844

except (IOError, OSError) as e:

2845

if not debug:

2846

try:

2847

os.remove(tempname)

2848

except NameError:

2849

pass

2850

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

2851

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

2852

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

2853

else:

2854

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

2855

exc_info=e)

2856

raise

2857

2858

# Delete all clients, and settings from config

1981

service.cleanup()

1982

2859

1983

while tcp_server.clients:

2860

name, client = tcp_server.clients.popitem()

1984

client = tcp_server.clients.pop()

2861

1985

if use_dbus:

2862

1986

client.remove_from_connection()

1987

client.disable_hook = None

2863

1988

# Don't signal anything except ClientRemoved

2864

1989

client.disable(quiet=True)

2865

1990

if use_dbus:

2866

1991

# Emit D-Bus signal

2867

mandos_dbus_service.ClientRemoved(

2868

client.dbus_object_path, client.name)

2869

client_settings.clear()

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1993

client.name)

2870

1994

2871

1995

atexit.register(cleanup)

2872

1996

2873

for client in tcp_server.clients.itervalues():

1997

for client in tcp_server.clients:

2874

1998

if use_dbus:

2875

1999

# Emit D-Bus signal

2876

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2877

# Need to initiate checking of clients

2878

if client.enabled:

2879

client.init_checker()

2001

client.enable()

2880

2002

2881

2003

tcp_server.enable()

2882

2004

tcp_server.server_activate()

2883

2005

2884

2006

# Find out what port we got

2885

if zeroconf:

2886

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

2007

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

2887

2008

if use_ipv6:

2888

2009

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

2889

" flowinfo %d, scope_id %d",

2890

*tcp_server.socket.getsockname())

2010

" flowinfo %d, scope_id %d"

2011

% tcp_server.socket.getsockname())

2891

2012

else: # IPv4

2892

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

2893

*tcp_server.socket.getsockname())

2013

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

2014

% tcp_server.socket.getsockname())

2894

2015

2895

2016

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

2896

2017

2897

2018

try:

2898

if zeroconf:

2899

# From the Avahi example code

2900

try:

2901

service.activate()

2902

except dbus.exceptions.DBusException as error:

2903

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

2904

cleanup()

2905

sys.exit(1)

2906

# End of Avahi example code

2019

# From the Avahi example code

2020

try:

2021

service.activate()

2022

except dbus.exceptions.DBusException, error:

2023

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

2024

cleanup()

2025

sys.exit(1)

2026

# End of Avahi example code

2907

2027

2908

2028

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

2909

2029

lambda *args, **kwargs:

2912

2032

2913

2033

logger.debug("Starting main loop")

2914

2034

main_loop.run()

2915

except AvahiError as error:

2916

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

2035

except AvahiError, error:

2036

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

2917

2037

cleanup()

2918

2038

sys.exit(1)

2919

2039

except KeyboardInterrupt:

2924

2044

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

2925

2045

cleanup()

2926

2046

2927

2928

2047

if __name__ == '__main__':

2929

2048

main()