/mandos/trunk : revision 482

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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 datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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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 = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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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.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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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.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew(),

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follow_name_owner_changes=True),

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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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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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220

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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222

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"""

372

if self.group is not None:

373

try:

374

self.group.Free()

375

except (dbus.exceptions.UnknownMethodException,

376

dbus.exceptions.DBusException):

377

pass

378

self.group = None

379

227

self.remove()

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381

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

382

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

383

230

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

384

bad_states = {

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

392

if error is None:

393

logger.error(bad_states[state])

394

else:

395

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

396

self.cleanup()

239

if bad_states[state]:

240

logger.error(bad_states[state])

241

self.remove()

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elif state == avahi.SERVER_RUNNING:

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

243

self.add()

410

244

else:

411

if error is None:

412

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

413

else:

414

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

415

245

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

416

246

def activate(self):

417

247

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

418

248

if self.server is None:

422

252

follow_name_owner_changes=True),

423

253

avahi.DBUS_INTERFACE_SERVER)

424

254

self.server.connect_to_signal("StateChanged",

425

self.server_state_changed)

255

self.server_state_changed)

426

256

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

427

257

428

258

429

class AvahiServiceToSyslog(AvahiService):

430

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

431

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

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

436

return ret

437

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

447

448

259

class Client(object):

449

260

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

450

261

451

262

Attributes:

452

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

263

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

453

264

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

454

265

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

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

462

273

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

463

274

checker_initiator_tag: a gobject event source tag, or None

464

275

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

465

client_structure: Object describing what attributes a client has

466

and is used for storing the client at exit

467

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current_checker_command: string; current running checker_command

277

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

468

278

disable_initiator_tag: a gobject event source tag, or None

469

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enabled: bool()

470

280

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

473

283

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

474

284

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

475

285

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

476

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

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

286

last_enabled: datetime.datetime(); (UTC)

482

287

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

483

288

D-Bus identifiers

484

289

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

485

290

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

486

291

until this client is disabled

487

extended_timeout: extra long timeout when secret has been sent

488

292

runtime_expansions: Allowed attributes for runtime expansion.

489

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

490

disabled, or None

491

server_settings: The server_settings dict from main()

492

293

"""

493

294

494

295

runtime_expansions = ("approval_delay", "approval_duration",

495

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

496

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

497

"last_approval_request", "last_checked_ok",

296

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

297

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

498

298

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

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

510

299

511

300

@staticmethod

512

def config_parser(config):

513

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

514

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

515

with exceptions for any special settings as defined above.

516

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

517

value given the same arguments.

518

"""

519

settings = {}

520

for client_name in config.sections():

521

section = dict(config.items(client_name))

522

client = settings[client_name] = {}

523

524

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

525

# Reformat values from string types to Python types

526

client["approved_by_default"] = config.getboolean(

527

client_name, "approved_by_default")

528

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

529

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

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

535

.replace(" ", ""))

536

if "secret" in section:

537

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

538

elif "secfile" in section:

539

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

540

(section["secfile"])),

541

"rb") as secfile:

542

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

543

else:

544

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

545

.format(section))

546

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

547

client["extended_timeout"] = string_to_delta(

548

section["extended_timeout"])

549

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

550

client["approval_delay"] = string_to_delta(

551

section["approval_delay"])

552

client["approval_duration"] = string_to_delta(

553

section["approval_duration"])

554

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

555

client["last_approval_request"] = None

556

client["last_checked_ok"] = None

557

client["last_checker_status"] = -2

558

559

return settings

560

561

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

301

def _timedelta_to_milliseconds(td):

302

"Convert a datetime.timedelta() to milliseconds"

303

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

304

+ (td.seconds * 1000)

305

+ (td.microseconds // 1000))

306

307

def timeout_milliseconds(self):

308

"Return the 'timeout' attribute in milliseconds"

309

return self._timedelta_to_milliseconds(self.timeout)

310

311

def interval_milliseconds(self):

312

"Return the 'interval' attribute in milliseconds"

313

return self._timedelta_to_milliseconds(self.interval)

314

315

def approval_delay_milliseconds(self):

316

return self._timedelta_to_milliseconds(self.approval_delay)

317

318

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

319

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

320

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

321

attribute."""

562

322

self.name = name

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

566

# adding all client settings

567

for setting, value in settings.items():

568

setattr(self, setting, value)

569

570

if self.enabled:

571

if not hasattr(self, "last_enabled"):

572

self.last_enabled = datetime.datetime.utcnow()

573

if not hasattr(self, "expires"):

574

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

575

+ self.timeout)

576

else:

577

self.last_enabled = None

578

self.expires = None

579

323

if config is None:

324

config = {}

580

325

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

326

# Uppercase and remove spaces from fingerprint for later

327

# comparison purposes with return value from the fingerprint()

328

# function

329

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

330

.replace(" ", ""))

581

331

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

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

341

% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

346

self.last_enabled = None

347

self.last_checked_ok = None

348

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

349

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

350

self.disable_hook = disable_hook

586

351

self.checker = None

587

352

self.checker_initiator_tag = None

588

353

self.disable_initiator_tag = None

589

354

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

590

356

self.current_checker_command = None

591

self.approved = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

592

361

self.approvals_pending = 0

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

597

if not attr.startswith("_")]

598

self.client_structure.append("client_structure")

599

600

for name, t in inspect.getmembers(

601

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

602

if not name.startswith("_"):

603

self.client_structure.append(name)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

365

config["approval_duration"])

366

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

604

367

605

# Send notice to process children that client state has changed

606

368

def send_changedstate(self):

607

with self.changedstate:

608

self.changedstate.notify_all()

609

369

self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

372

610

373

def enable(self):

611

374

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

612

375

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

613

376

# Already enabled

614

377

return

615

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

616

self.enabled = True

378

self.send_changedstate()

617

379

self.last_enabled = datetime.datetime.utcnow()

618

self.init_checker()

619

self.send_changedstate()

380

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

381

# and every interval from then on.

382

self.checker_initiator_tag = (gobject.timeout_add

383

(self.interval_milliseconds(),

384

self.start_checker))

385

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

386

self.disable_initiator_tag = (gobject.timeout_add

387

(self.timeout_milliseconds(),

388

self.disable))

389

self.enabled = True

390

# Also start a new checker *right now*.

391

self.start_checker()

620

392

621

393

def disable(self, quiet=True):

622

394

"""Disable this client."""

623

395

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

624

396

return False

625

397

if not quiet:

398

self.send_changedstate()

399

if not quiet:

626

400

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

627

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

401

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

628

402

gobject.source_remove(self.disable_initiator_tag)

629

403

self.disable_initiator_tag = None

630

self.expires = None

631

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

404

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

632

405

gobject.source_remove(self.checker_initiator_tag)

633

406

self.checker_initiator_tag = None

634

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

635

410

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

638

411

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

639

412

return False

640

413

641

414

def __del__(self):

415

self.disable_hook = None

642

416

self.disable()

643

417

644

def init_checker(self):

645

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

646

# and every interval from then on.

647

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

652

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

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

657

# Also start a new checker *right now*.

658

self.start_checker()

659

660

def checker_callback(self, source, condition, connection,

661

command):

418

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

662

419

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

663

420

self.checker_callback_tag = None

664

421

self.checker = None

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

672

if self.last_checker_status == 0:

422

if os.WIFEXITED(condition):

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

673

425

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

674

426

vars(self))

675

427

self.checked_ok()

676

428

else:

677

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

429

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

430

vars(self))

678

431

else:

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

681

432

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

682

433

vars(self))

683

return False

684

434

685

435

def checked_ok(self):

686

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

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

687

441

self.last_checked_ok = datetime.datetime.utcnow()

688

self.last_checker_status = 0

689

self.last_checker_signal = None

690

self.bump_timeout()

691

692

def bump_timeout(self, timeout=None):

693

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

694

if timeout is None:

695

timeout = self.timeout

696

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

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

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

702

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

703

446

704

447

def need_approval(self):

705

448

self.last_approval_request = datetime.datetime.utcnow()

710

453

If a checker already exists, leave it running and do

711

454

nothing."""

712

455

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

713

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

714

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

715

# would inevitably timeout, since no checker would get a

716

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

456

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

457

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

458

# client would inevitably timeout, since no checker would get

459

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

717

460

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

718

461

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

719

462

# should be.

720

463

721

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

722

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

723

self.checker.join()

724

self.checker = None

464

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

465

try:

466

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

467

except (AttributeError, OSError) as error:

468

if (isinstance(error, OSError)

469

and error.errno != errno.ECHILD):

470

raise error

471

else:

472

if pid:

473

logger.warning("Checker was a zombie")

474

gobject.source_remove(self.checker_callback_tag)

475

self.checker_callback(pid, status,

476

self.current_checker_command)

725

477

# Start a new checker if needed

726

478

if self.checker is None:

727

# Escape attributes for the shell

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

731

479

try:

732

command = self.checker_command % escaped_attrs

733

except TypeError as error:

734

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

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

480

# In case checker_command has exactly one % operator

481

command = self.checker_command % self.host

482

except TypeError:

483

# Escape attributes for the shell

484

escaped_attrs = dict(

485

(attr,

486

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

487

errors=

488

'replace')))

489

for attr in

490

self.runtime_expansions)

491

492

try:

493

command = self.checker_command % escaped_attrs

494

except TypeError as error:

495

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

496

' %s', self.checker_command, error)

497

return True # Try again later

738

498

self.current_checker_command = command

739

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

740

self.name)

741

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

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

763

self.checker_callback, pipe[0], command)

499

try:

500

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

501

command, self.name)

502

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

503

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

504

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

505

# always replaced by /dev/null.)

506

self.checker = subprocess.Popen(command,

507

close_fds=True,

508

shell=True, cwd="/")

509

self.checker_callback_tag = (gobject.child_watch_add

510

(self.checker.pid,

511

self.checker_callback,

512

data=command))

513

# The checker may have completed before the gobject

514

# watch was added. Check for this.

515

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

516

if pid:

517

gobject.source_remove(self.checker_callback_tag)

518

self.checker_callback(pid, status, command)

519

except OSError as error:

520

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

521

error)

764

522

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

765

523

return True

766

524

772

530

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

773

531

return

774

532

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

775

self.checker.terminate()

533

try:

534

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

535

#time.sleep(0.5)

536

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

537

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

538

except OSError as error:

539

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

540

raise

776

541

self.checker = None

777

542

778

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

543

def dbus_service_property(dbus_interface, signature="v",

544

access="readwrite", byte_arrays=False):

783

545

"""Decorators for marking methods of a DBusObjectWithProperties to

784

546

become properties on the D-Bus.

785

547

794

556

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

795

557

if byte_arrays and signature != "ay":

796

558

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

797

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

798

559

" signature %r" % signature)

799

560

def decorator(func):

800

561

func._dbus_is_property = True

801

562

func._dbus_interface = dbus_interface

806

567

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

807

568

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

808

569

return func

809

810

return decorator

811

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

831

return decorator

832

833

834

def dbus_annotations(annotations):

835

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

836

Usage:

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

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

842

access="r")

843

def Property_dbus_property(self):

844

return dbus.Boolean(False)

845

"""

846

847

def decorator(func):

848

func._dbus_annotations = annotations

849

return func

850

851

570

return decorator

852

571

853

572

854

573

class DBusPropertyException(dbus.exceptions.DBusException):

855

574

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

856

575

"""

857

pass

576

def __unicode__(self):

577

return unicode(str(self))

858

578

859

579

860

580

class DBusPropertyAccessException(DBusPropertyException):

871

591

872

592

class DBusObjectWithProperties(dbus.service.Object):

873

593

"""A D-Bus object with properties.

874

594

875

595

Classes inheriting from this can use the dbus_service_property

876

596

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

877

597

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

878

598

"""

879

599

880

600

@staticmethod

881

def _is_dbus_thing(thing):

882

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

883

884

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

885

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

886

"""

887

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

888

False)

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

889

603

890

def _get_all_dbus_things(self, thing):

604

def _get_all_dbus_properties(self):

891

605

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

892

606

"""

893

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

894

athing.__get__(self))

895

for cls in self.__class__.__mro__

896

for name, athing in

897

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

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

898

610

899

611

def _get_dbus_property(self, interface_name, property_name):

900

612

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

901

613

property with the specified name and interface.

902

614

"""

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

906

if (value._dbus_name == property_name

907

and value._dbus_interface == interface_name):

908

return value.__get__(self)

909

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

910

625

# No such property

911

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

912

self.dbus_object_path, interface_name, property_name))

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

627

+ interface_name + "."

628

+ property_name)

913

629

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

630

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

916

631

out_signature="v")

917

632

def Get(self, interface_name, property_name):

918

633

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

936

651

# The byte_arrays option is not supported yet on

937

652

# signatures other than "ay".

938

653

if prop._dbus_signature != "ay":

939

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

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

654

raise ValueError

655

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

656

for byte in value))

944

657

prop(value)

945

658

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

659

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

948

660

out_signature="a{sv}")

949

661

def GetAll(self, interface_name):

950

662

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

951

663

standard.

952

664

953

665

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

954

666

"""

955

properties = {}

956

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

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

957

669

if (interface_name

958

670

and interface_name != prop._dbus_interface):

959

671

# Interface non-empty but did not match

963

675

continue

964

676

value = prop()

965

677

if not hasattr(value, "variant_level"):

966

properties[name] = value

678

all[name] = value

967

679

continue

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

970

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

971

972

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

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

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

976

standard.

977

"""

978

pass

680

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

681

value.variant_level+1)

682

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

979

683

980

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

685

out_signature="s",

982

686

path_keyword='object_path',

983

687

connection_keyword='connection')

984

688

def Introspect(self, object_path, connection):

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

689

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

988

690

"""

989

691

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

990

692

connection)

991

693

try:

992

694

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

993

994

695

def make_tag(document, name, prop):

995

696

e = document.createElement("property")

996

697

e.setAttribute("name", name)

997

698

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

998

699

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

999

700

return e

1000

1001

701

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

1002

# Add property tags

1003

702

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

1004

703

for name, prop

1005

in self._get_all_dbus_things("property")

704

in self._get_all_dbus_properties()

1006

705

if prop._dbus_interface

1007

706

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

1008

707

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1038

708

# Add the names to the return values for the

1039

709

# "org.freedesktop.DBus.Properties" methods

1040

710

if (if_tag.getAttribute("name")

1055

725

except (AttributeError, xml.dom.DOMException,

1056

726

xml.parsers.expat.ExpatError) as error:

1057

727

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

1058

exc_info=error)

728

error)

1059

729

return xmlstring

1060

730

1061

731

1062

def datetime_to_dbus(dt, variant_level=0):

1063

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

1064

if dt is None:

1065

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

1066

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

1067

1068

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1070

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

1071

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

1072

interface names according to the "alt_interface_names" mapping.

1073

Usage:

1074

1075

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

1076

"net.example.AlternateInterface"})

1077

class SampleDBusObject(dbus.service.Object):

1078

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

1079

def SampleDBusMethod():

1080

pass

1081

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

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

1084

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

1085

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

1086

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

1087

1088

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

1089

(from DBusObjectWithProperties) and interfaces (from the

1090

dbus_interface_annotations decorator).

1091

"""

1092

1093

def wrapper(cls):

1094

for orig_interface_name, alt_interface_name in (

1095

alt_interface_names.items()):

1096

attr = {}

1097

interface_names = set()

1098

# Go though all attributes of the class

1099

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

1100

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

1101

# with the wrong interface name

1102

if (not hasattr(attribute, "_dbus_interface")

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

1105

continue

1106

# Create an alternate D-Bus interface name based on

1107

# the current name

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

1111

# Is this a D-Bus signal?

1112

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

1113

if sys.version_info.major == 2:

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

else:

1121

nonmethod_func = attribute

1122

# Create a new, but exactly alike, function

1123

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

1124

# with the alternate D-Bus interface name

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1142

# Copy annotations, if any

1143

try:

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1146

except AttributeError:

1147

pass

1148

# Define a creator of a function to call both the

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

1152

def fixscope(func1, func2):

1153

"""This function is a scope container to pass

1154

func1 and func2 to the "call_both" function

1155

outside of its arguments"""

1156

1157

def call_both(*args, **kwargs):

1158

"""This function will emit two D-Bus

1159

signals by calling func1 and func2"""

1160

func1(*args, **kwargs)

1161

func2(*args, **kwargs)

1162

1163

return call_both

1164

# Create the "call_both" function and add it to

1165

# the class

1166

attr[attrname] = fixscope(attribute, new_function)

1167

# Is this a D-Bus method?

1168

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

1169

# Create a new, but exactly alike, function

1170

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

1171

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

1172

# to the class.

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1187

except AttributeError:

1188

pass

1189

# Is this a D-Bus property?

1190

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

1191

# Create a new, but exactly alike, function

1192

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

1193

# property with the alternate D-Bus interface

1194

# name. Add it to the class.

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1206

# Copy annotations, if any

1207

try:

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1210

except AttributeError:

1211

pass

1212

# Is this a D-Bus interface?

1213

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

1214

# Create a new, but exactly alike, function

1215

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

1216

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

1217

# to the class.

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1225

if deprecate:

1226

# Deprecate all alternate interfaces

1227

iname="_AlternateDBusNames_interface_annotation{}"

1228

for interface_name in interface_names:

1229

1230

@dbus_interface_annotations(interface_name)

1231

def func(self):

1232

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

1233

"true" }

1234

# Find an unused name

1235

for aname in (iname.format(i)

1236

for i in itertools.count()):

1237

if aname not in attr:

1238

attr[aname] = func

1239

break

1240

if interface_names:

1241

# Replace the class with a new subclass of it with

1242

# methods, signals, etc. as created above.

1243

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

1244

(cls, ), attr)

1245

return cls

1246

1247

return wrapper

1248

1249

1250

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

1251

"se.bsnet.fukt.Mandos"})

1252

732

class ClientDBus(Client, DBusObjectWithProperties):

1253

733

"""A Client class using D-Bus

1254

734

1258

738

"""

1259

739

1260

740

runtime_expansions = (Client.runtime_expansions

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

741

+ ("dbus_object_path",))

1264

742

1265

743

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

1266

744

1267

745

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

746

self._approvals_pending = 0

1268

747

self.bus = bus

1269

748

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

1270

749

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

1271

750

# the D-Bus

1272

client_object_name = str(self.name).translate(

751

client_object_name = unicode(self.name).translate(

1273

752

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

1274

753

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

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

754

self.dbus_object_path = (dbus.ObjectPath

755

("/clients/" + client_object_name))

1277

756

DBusObjectWithProperties.__init__(self, self.bus,

1278

757

self.dbus_object_path)

1279

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

1285

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

1286

its changes to DBus.

1287

1288

transform_fun: Function that takes a value and a variant_level

1289

and transforms it to a D-Bus type.

1290

dbus_name: D-Bus name of the variable

1291

type_func: Function that transform the value before sending it

1292

to the D-Bus. Default: no transform

1293

variant_level: D-Bus variant level. Default: 1

1294

"""

1295

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

1296

1297

def setter(self, value):

1298

if hasattr(self, "dbus_object_path"):

1299

if (not hasattr(self, attrname) or

1300

type_func(getattr(self, attrname, None))

1301

!= type_func(value)):

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

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

1315

dbus_value }),

1316

dbus.Array())

1317

setattr(self, attrname, value)

1318

1319

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

1320

1321

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

approvals_pending = notifychangeproperty(dbus.Boolean,

1323

"ApprovalPending",

1324

type_func = bool)

1325

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

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

"LastEnabled")

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1335

last_approval_request = notifychangeproperty(

1336

datetime_to_dbus, "LastApprovalRequest")

1337

approved_by_default = notifychangeproperty(dbus.Boolean,

1338

"ApprovedByDefault")

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1342

approval_duration = notifychangeproperty(

1343

dbus.UInt64, "ApprovalDuration",

1344

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

1345

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

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1349

extended_timeout = notifychangeproperty(

1350

dbus.UInt64, "ExtendedTimeout",

1351

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

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

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

1355

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

1356

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

1357

invalidate_only=True)

1358

1359

del notifychangeproperty

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1360

802

1361

803

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

1362

804

try:

1367

809

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

1368

810

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

1369

811

1370

def checker_callback(self, source, condition,

1371

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

1372

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

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

812

def checker_callback(self, pid, condition, command,

813

*args, **kwargs):

814

self.checker_callback_tag = None

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

819

if os.WIFEXITED(condition):

820

exitstatus = os.WEXITSTATUS(condition)

1377

821

# Emit D-Bus signal

1378

822

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

823

dbus.Int64(condition),

1380

824

dbus.String(command))

1381

825

else:

1382

826

# Emit D-Bus signal

1383

827

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

1384

dbus.Int64(

1385

self.last_checker_signal),

828

dbus.Int64(condition),

1386

829

dbus.String(command))

1387

return ret

830

831

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

832

*args, **kwargs)

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

1388

850

1389

851

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

1390

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

852

old_checker = self.checker

853

if self.checker is not None:

854

old_checker_pid = self.checker.pid

855

else:

856

old_checker_pid = None

1391

857

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

1392

858

# Only if new checker process was started

1393

859

if (self.checker is not None

1394

860

and old_checker_pid != self.checker.pid):

1395

861

# Emit D-Bus signal

1396

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1397

866

return r

1398

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1399

877

def _reset_approved(self):

1400

self.approved = None

878

self._approved = None

1401

879

return False

1402

880

1403

881

def approve(self, value=True):

1404

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

1407

882

self.send_changedstate()

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

885

(self.approval_duration),

886

self._reset_approved)

887

1408

888

1409

889

## D-Bus methods, signals & properties

1410

1411

## Interfaces

890

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

1412

891

1413

892

## Signals

1414

893

1425

904

pass

1426

905

1427

906

# PropertyChanged - signal

1428

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

1429

907

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

1430

908

def PropertyChanged(self, property, value):

1431

909

"D-Bus signal"

1495

973

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

1496

974

1497

975

# ApprovedByDefault - property

1498

@dbus_service_property(_interface,

1499

signature="b",

976

@dbus_service_property(_interface, signature="b",

1500

977

access="readwrite")

1501

978

def ApprovedByDefault_dbus_property(self, value=None):

1502

979

if value is None: # get

1503

980

return dbus.Boolean(self.approved_by_default)

1504

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1505

985

1506

986

# ApprovalDelay - property

1507

@dbus_service_property(_interface,

1508

signature="t",

987

@dbus_service_property(_interface, signature="t",

1509

988

access="readwrite")

1510

989

def ApprovalDelay_dbus_property(self, value=None):

1511

990

if value is None: # get

1512

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

1513

* 1000)

991

return dbus.UInt64(self.approval_delay_milliseconds())

1514

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1515

996

1516

997

# ApprovalDuration - property

1517

@dbus_service_property(_interface,

1518

signature="t",

998

@dbus_service_property(_interface, signature="t",

1519

999

access="readwrite")

1520

1000

def ApprovalDuration_dbus_property(self, value=None):

1521

1001

if value is None: # get

1522

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

1523

* 1000)

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1003

self.approval_duration))

1524

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1525

1008

1526

1009

# Name - property

1527

1010

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

1534

1017

return dbus.String(self.fingerprint)

1535

1018

1536

1019

# Host - property

1537

@dbus_service_property(_interface,

1538

signature="s",

1020

@dbus_service_property(_interface, signature="s",

1539

1021

access="readwrite")

1540

1022

def Host_dbus_property(self, value=None):

1541

1023

if value is None: # get

1542

1024

return dbus.String(self.host)

1543

self.host = str(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1544

1029

1545

1030

# Created - property

1546

1031

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

1547

1032

def Created_dbus_property(self):

1548

return datetime_to_dbus(self.created)

1033

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

1549

1034

1550

1035

# LastEnabled - property

1551

1036

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

1552

1037

def LastEnabled_dbus_property(self):

1553

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1554

1041

1555

1042

# Enabled - property

1556

@dbus_service_property(_interface,

1557

signature="b",

1043

@dbus_service_property(_interface, signature="b",

1558

1044

access="readwrite")

1559

1045

def Enabled_dbus_property(self, value=None):

1560

1046

if value is None: # get

1565

1051

self.disable()

1566

1052

1567

1053

# LastCheckedOK - property

1568

@dbus_service_property(_interface,

1569

signature="s",

1054

@dbus_service_property(_interface, signature="s",

1570

1055

access="readwrite")

1571

1056

def LastCheckedOK_dbus_property(self, value=None):

1572

1057

if value is not None:

1573

1058

self.checked_ok()

1574

1059

return

1575

return datetime_to_dbus(self.last_checked_ok)

1576

1577

# LastCheckerStatus - property

1578

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

1579

def LastCheckerStatus_dbus_property(self):

1580

return dbus.Int16(self.last_checker_status)

1581

1582

# Expires - property

1583

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

1584

def Expires_dbus_property(self):

1585

return datetime_to_dbus(self.expires)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1586

1064

1587

1065

# LastApprovalRequest - property

1588

1066

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

1589

1067

def LastApprovalRequest_dbus_property(self):

1590

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1591

1073

1592

1074

# Timeout - property

1593

@dbus_service_property(_interface,

1594

signature="t",

1075

@dbus_service_property(_interface, signature="t",

1595

1076

access="readwrite")

1596

1077

def Timeout_dbus_property(self, value=None):

1597

1078

if value is None: # get

1598

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

1599

old_timeout = self.timeout

1079

return dbus.UInt64(self.timeout_milliseconds())

1600

1080

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

1601

# Reschedule disabling

1602

if self.enabled:

1603

now = datetime.datetime.utcnow()

1604

self.expires += self.timeout - old_timeout

1605

if self.expires <= now:

1606

# The timeout has passed

1607

self.disable()

1608

else:

1609

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

1610

is None):

1611

return

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

1614

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

1615

self.disable)

1616

1617

# ExtendedTimeout - property

1618

@dbus_service_property(_interface,

1619

signature="t",

1620

access="readwrite")

1621

def ExtendedTimeout_dbus_property(self, value=None):

1622

if value is None: # get

1623

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

1624

* 1000)

1625

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1086

# Reschedule timeout

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

1626

1101

1627

1102

# Interval - property

1628

@dbus_service_property(_interface,

1629

signature="t",

1103

@dbus_service_property(_interface, signature="t",

1630

1104

access="readwrite")

1631

1105

def Interval_dbus_property(self, value=None):

1632

1106

if value is None: # get

1633

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

1107

return dbus.UInt64(self.interval_milliseconds())

1634

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1635

1112

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

1636

1113

return

1637

if self.enabled:

1638

# Reschedule checker run

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1643

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

1644

1120

# Checker - property

1645

@dbus_service_property(_interface,

1646

signature="s",

1121

@dbus_service_property(_interface, signature="s",

1647

1122

access="readwrite")

1648

1123

def Checker_dbus_property(self, value=None):

1649

1124

if value is None: # get

1650

1125

return dbus.String(self.checker_command)

1651

self.checker_command = str(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1652

1131

1653

1132

# CheckerRunning - property

1654

@dbus_service_property(_interface,

1655

signature="b",

1133

@dbus_service_property(_interface, signature="b",

1656

1134

access="readwrite")

1657

1135

def CheckerRunning_dbus_property(self, value=None):

1658

1136

if value is None: # get

1668

1146

return self.dbus_object_path # is already a dbus.ObjectPath

1669

1147

1670

1148

# Secret = property

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1149

@dbus_service_property(_interface, signature="ay",

1150

access="write", byte_arrays=True)

1675

1151

def Secret_dbus_property(self, value):

1676

self.secret = bytes(value)

1152

self.secret = str(value)

1677

1153

1678

1154

del _interface

1679

1155

1683

1159

self._pipe = child_pipe

1684

1160

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

1685

1161

if not self._pipe.recv():

1686

raise KeyError(fpr)

1687

1162

raise KeyError()

1163

1688

1164

def __getattribute__(self, name):

1689

if name == '_pipe':

1165

if(name == '_pipe'):

1690

1166

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

1691

1167

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

1692

1168

data = self._pipe.recv()

1693

1169

if data[0] == 'data':

1694

1170

return data[1]

1695

1171

if data[0] == 'function':

1696

1697

1172

def func(*args, **kwargs):

1698

1173

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

1699

1174

return self._pipe.recv()[1]

1700

1701

1175

return func

1702

1176

1703

1177

def __setattr__(self, name, value):

1704

if name == '_pipe':

1178

if(name == '_pipe'):

1705

1179

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

1706

1180

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

1707

1181

1715

1189

def handle(self):

1716

1190

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

1717

1191

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

1718

str(self.client_address))

1192

unicode(self.client_address))

1719

1193

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

1720

1194

self.server.child_pipe.fileno())

1721

1722

session = gnutls.connection.ClientSession(

1723

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

1724

1195

1196

session = (gnutls.connection

1197

.ClientSession(self.request,

1198

gnutls.connection

1199

.X509Credentials()))

1200

1725

1201

# Note: gnutls.connection.X509Credentials is really a

1726

1202

# generic GnuTLS certificate credentials object so long as

1727

1203

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

1728

1204

# here despite using OpenPGP certificates.

1729

1205

1730

1206

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

1731

1207

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

1732

1208

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

1735

1211

priority = self.server.gnutls_priority

1736

1212

if priority is None:

1737

1213

priority = "NORMAL"

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1740

1214

(gnutls.library.functions

1215

.gnutls_priority_set_direct(session._c_object,

1216

priority, None))

1217

1741

1218

# Start communication using the Mandos protocol

1742

1219

# Get protocol number

1743

1220

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

1744

1221

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

1745

1222

try:

1746

1223

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

1747

raise RuntimeError(line)

1224

raise RuntimeError

1748

1225

except (ValueError, IndexError, RuntimeError) as error:

1749

1226

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

1750

1227

return

1751

1228

1752

1229

# Start GnuTLS connection

1753

1230

try:

1754

1231

session.handshake()

1758

1235

# established. Just abandon the request.

1759

1236

return

1760

1237

logger.debug("Handshake succeeded")

1761

1238

1762

1239

approval_required = False

1763

1240

try:

1764

1241

try:

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1242

fpr = self.fingerprint(self.peer_certificate

1243

(session))

1767

1244

except (TypeError,

1768

1245

gnutls.errors.GNUTLSError) as error:

1769

1246

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

1770

1247

return

1771

1248

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

1772

1249

1773

1250

try:

1774

1251

client = ProxyClient(child_pipe, fpr,

1775

1252

self.client_address)

1783

1260

1784

1261

while True:

1785

1262

if not client.enabled:

1786

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

1787

client.name)

1263

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

1264

client.name)

1788

1265

if self.server.use_dbus:

1789

1266

# Emit D-Bus signal

1790

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

1791

1268

return

1792

1269

1793

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

1794

1271

#We are approved or approval is disabled

1795

1272

break

1796

elif client.approved is None:

1273

elif client._approved is None:

1797

1274

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

1798

1275

client.name)

1799

1276

if self.server.use_dbus:

1800

1277

# Emit D-Bus signal

1801

1278

client.NeedApproval(

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1279

client.approval_delay_milliseconds(),

1280

client.approved_by_default)

1804

1281

else:

1805

1282

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

1806

1283

client.name)

1810

1287

return

1811

1288

1812

1289

#wait until timeout or approved

1290

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

1813

1291

time = datetime.datetime.now()

1814

1292

client.changedstate.acquire()

1815

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

1293

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

1816

1294

client.changedstate.release()

1817

1295

time2 = datetime.datetime.now()

1818

1296

if (time2 - time) >= delay:

1834

1312

try:

1835

1313

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

1836

1314

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1315

logger.warning("gnutls send failed")

1839

1316

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1317

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

1318

sent, len(client.secret)

1319

- (sent_size + sent))

1843

1320

sent_size += sent

1844

1321

1845

1322

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

1846

# bump the timeout using extended_timeout

1847

client.bump_timeout(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

1848

1325

if self.server.use_dbus:

1849

1326

# Emit D-Bus signal

1850

1327

client.GotSecret()

1855

1332

try:

1856

1333

session.bye()

1857

1334

except gnutls.errors.GNUTLSError as error:

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1335

logger.warning("GnuTLS bye failed")

1860

1336

1861

1337

@staticmethod

1862

1338

def peer_certificate(session):

1863

1339

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

1864

1340

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1341

if (gnutls.library.functions

1342

.gnutls_certificate_type_get(session._c_object)

1867

1343

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

1344

# ...do the normal thing

1869

1345

return session.peer_certificate

1883

1359

def fingerprint(openpgp):

1884

1360

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1885

1361

# New GnuTLS "datum" with the OpenPGP public key

1886

datum = gnutls.library.types.gnutls_datum_t(

1887

ctypes.cast(ctypes.c_char_p(openpgp),

1888

ctypes.POINTER(ctypes.c_ubyte)),

1889

ctypes.c_uint(len(openpgp)))

1362

datum = (gnutls.library.types

1363

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

1364

ctypes.POINTER

1365

(ctypes.c_ubyte)),

1366

ctypes.c_uint(len(openpgp))))

1890

1367

# New empty GnuTLS certificate

1891

1368

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1369

(gnutls.library.functions

1370

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1894

1371

# Import the OpenPGP public key into the certificate

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1372

(gnutls.library.functions

1373

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

1374

gnutls.library.constants

1375

.GNUTLS_OPENPGP_FMT_RAW))

1898

1376

# Verify the self signature in the key

1899

1377

crtverify = ctypes.c_uint()

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1378

(gnutls.library.functions

1379

.gnutls_openpgp_crt_verify_self(crt, 0,

1380

ctypes.byref(crtverify)))

1902

1381

if crtverify.value != 0:

1903

1382

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1383

raise (gnutls.errors.CertificateSecurityError

1384

("Verify failed"))

1906

1385

# New buffer for the fingerprint

1907

1386

buf = ctypes.create_string_buffer(20)

1908

1387

buf_len = ctypes.c_size_t()

1909

1388

# Get the fingerprint from the certificate into the buffer

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1389

(gnutls.library.functions

1390

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

1391

ctypes.byref(buf_len)))

1912

1392

# Deinit the certificate

1913

1393

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1914

1394

# Convert the buffer to a Python bytestring

1915

1395

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

1916

1396

# Convert the bytestring to hexadecimal notation

1917

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

1397

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

1918

1398

return hex_fpr

1919

1399

1920

1400

1921

1401

class MultiprocessingMixIn(object):

1922

1402

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

1923

1924

1403

def sub_process_main(self, request, address):

1925

1404

try:

1926

1405

self.finish_request(request, address)

1927

except Exception:

1406

except:

1928

1407

self.handle_error(request, address)

1929

1408

self.close_request(request)

1930

1409

1931

1410

def process_request(self, request, address):

1932

1411

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

1933

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

1934

args = (request, address))

1935

proc.start()

1936

return proc

1937

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1938

1414

1939

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1940

1416

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

1941

1942

1417

def process_request(self, request, client_address):

1943

1418

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

1944

1419

1945

1420

This function creates a new pipe in self.pipe

1946

1421

"""

1947

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1948

1949

proc = MultiprocessingMixIn.process_request(self, request,

1950

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1951

1426

self.child_pipe.close()

1952

self.add_pipe(parent_pipe, proc)

1953

1954

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1955

1430

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

1956

raise NotImplementedError()

1957

1431

raise NotImplementedError

1958

1432

1959

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1960

1434

socketserver.TCPServer, object):

1965

1439

interface: None or a network interface name (string)

1966

1440

use_ipv6: Boolean; to use IPv6 or not

1967

1441

"""

1968

1969

1442

def __init__(self, server_address, RequestHandlerClass,

1970

interface=None,

1971

use_ipv6=True,

1972

socketfd=None):

1973

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

1974

creating a new one with socket.socket().

1975

"""

1443

interface=None, use_ipv6=True):

1976

1444

self.interface = interface

1977

1445

if use_ipv6:

1978

1446

self.address_family = socket.AF_INET6

1979

if socketfd is not None:

1980

# Save the file descriptor

1981

self.socketfd = socketfd

1982

# Save the original socket.socket() function

1983

self.socket_socket = socket.socket

1984

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

1985

#

1986

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

1987

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

1988

# patching socket.socket.)

1989

#

1990

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

1991

@functools.wraps(socket.socket)

1992

def socket_wrapper(*args, **kwargs):

1993

# Restore original function so subsequent calls are

1994

# not affected.

1995

socket.socket = self.socket_socket

1996

del self.socket_socket

1997

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

1998

# saved file descriptor.

1999

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

2000

# Replace socket.socket() function with wrapper

2001

socket.socket = socket_wrapper

2002

# The socketserver.TCPServer.__init__ will call

2003

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

2004

# socket_wrapper(), if socketfd was set.

2005

1447

socketserver.TCPServer.__init__(self, server_address,

2006

1448

RequestHandlerClass)

2007

2008

1449

def server_bind(self):

2009

1450

"""This overrides the normal server_bind() function

2010

1451

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

2016

1457

self.interface)

2017

1458

else:

2018

1459

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1460

self.socket.setsockopt(socket.SOL_SOCKET,

1461

SO_BINDTODEVICE,

1462

str(self.interface

1463

+ '\0'))

2022

1464

except socket.error as error:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

1465

if error[0] == errno.EPERM:

1466

logger.error("No permission to"

1467

" bind to interface %s",

1468

self.interface)

1469

elif error[0] == errno.ENOPROTOOPT:

2027

1470

logger.error("SO_BINDTODEVICE not available;"

2028

1471

" cannot bind to interface %s",

2029

1472

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

1473

else:

2034

1474

raise

2035

1475

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

2038

1478

if self.address_family == socket.AF_INET6:

2039

1479

any_address = "::" # in6addr_any

2040

1480

else:

2041

any_address = "0.0.0.0" # INADDR_ANY

1481

any_address = socket.INADDR_ANY

2042

1482

self.server_address = (any_address,

2043

1483

self.server_address[1])

2044

1484

elif not self.server_address[1]:

2045

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

1485

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

1486

0)

2046

1487

# if self.interface:

2047

1488

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

2048

1489

# 0, # port

2062

1503

2063

1504

Assumes a gobject.MainLoop event loop.

2064

1505

"""

2065

2066

1506

def __init__(self, server_address, RequestHandlerClass,

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

1507

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

1508

gnutls_priority=None, use_dbus=True):

2073

1509

self.enabled = False

2074

1510

self.clients = clients

2075

1511

if self.clients is None:

2076

self.clients = {}

1512

self.clients = set()

2077

1513

self.use_dbus = use_dbus

2078

1514

self.gnutls_priority = gnutls_priority

2079

1515

IPv6_TCPServer.__init__(self, server_address,

2080

1516

RequestHandlerClass,

2081

1517

interface = interface,

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1518

use_ipv6 = use_ipv6)

2085

1519

def server_activate(self):

2086

1520

if self.enabled:

2087

1521

return socketserver.TCPServer.server_activate(self)

2088

2089

1522

def enable(self):

2090

1523

self.enabled = True

2091

2092

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

2093

1525

# Call "handle_ipc" for both data and EOF events

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2097

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

proc = proc))

2100

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

1526

gobject.io_add_watch(parent_pipe.fileno(),

1527

gobject.IO_IN | gobject.IO_HUP,

1528

functools.partial(self.handle_ipc,

1529

parent_pipe = parent_pipe))

1530

1531

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

2104

1532

client_object=None):

2105

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

2106

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

2107

# Wait for other process to exit

2108

proc.join()

1533

condition_names = {

1534

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

1535

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

1536

# blocking).

1537

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

1538

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

1539

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

1540

# broken, usually for pipes and

1541

# sockets).

1542

}

1543

conditions_string = ' | '.join(name

1544

for cond, name in

1545

condition_names.iteritems()

1546

if cond & condition)

1547

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

1548

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

2109

1549

return False

2110

1550

2111

1551

# Read a request from the child

2116

1556

fpr = request[1]

2117

1557

address = request[2]

2118

1558

2119

for c in self.clients.itervalues():

1559

for c in self.clients:

2120

1560

if c.fingerprint == fpr:

2121

1561

client = c

2122

1562

break

2123

1563

else:

2124

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

2125

"dress: %s", fpr, address)

1564

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

1565

"dress: %s", fpr, address)

2126

1566

if self.use_dbus:

2127

1567

# Emit D-Bus signal

2128

mandos_dbus_service.ClientNotFound(fpr,

2129

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2130

1569

parent_pipe.send(False)

2131

1570

return False

2132

1571

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2136

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

1572

gobject.io_add_watch(parent_pipe.fileno(),

1573

gobject.IO_IN | gobject.IO_HUP,

1574

functools.partial(self.handle_ipc,

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2140

1577

parent_pipe.send(True)

2141

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

2142

# same fileno

1578

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

2143

1579

return False

2144

1580

if command == 'funcall':

2145

1581

funcname = request[1]

2146

1582

args = request[2]

2147

1583

kwargs = request[3]

2148

1584

2149

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

2150

funcname)(*args,

2151

**kwargs)))

2152

1585

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

1586

2153

1587

if command == 'getattr':

2154

1588

attrname = request[1]

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1589

if callable(client_object.__getattribute__(attrname)):

1590

parent_pipe.send(('function',))

2158

1591

else:

2159

parent_pipe.send((

2160

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

1592

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

2161

1593

2162

1594

if command == 'setattr':

2163

1595

attrname = request[1]

2164

1596

value = request[2]

2165

1597

setattr(client_object, attrname, value)

2166

1598

2167

1599

return True

2168

1600

2169

1601

2170

def rfc3339_duration_to_delta(duration):

2171

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

2172

2173

>>> rfc3339_duration_to_delta("P7D")

2174

datetime.timedelta(7)

2175

>>> rfc3339_duration_to_delta("PT60S")

2176

datetime.timedelta(0, 60)

2177

>>> rfc3339_duration_to_delta("PT60M")

2178

datetime.timedelta(0, 3600)

2179

>>> rfc3339_duration_to_delta("PT24H")

2180

datetime.timedelta(1)

2181

>>> rfc3339_duration_to_delta("P1W")

2182

datetime.timedelta(7)

2183

>>> rfc3339_duration_to_delta("PT5M30S")

2184

datetime.timedelta(0, 330)

2185

>>> rfc3339_duration_to_delta("P1DT3M20S")

2186

datetime.timedelta(1, 200)

2187

"""

2188

2189

# Parsing an RFC 3339 duration with regular expressions is not

2190

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

2191

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

2192

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

2193

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

2194

# avoid excessive use of external libraries.

2195

2196

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

2197

Token = collections.namedtuple("Token", (

2198

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

2199

# a "group" containing digits

2200

"value", # datetime.timedelta or None

2201

"followers")) # Tokens valid after this token

2202

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

2203

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

2204

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

2205

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

2206

datetime.timedelta(seconds=1),

2207

frozenset((token_end, )))

2208

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

2209

datetime.timedelta(minutes=1),

2210

frozenset((token_second, token_end)))

2211

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

2212

datetime.timedelta(hours=1),

2213

frozenset((token_minute, token_end)))

2214

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

2215

None,

2216

frozenset((token_hour, token_minute,

2217

token_second)))

2218

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

2219

datetime.timedelta(days=1),

2220

frozenset((token_time, token_end)))

2221

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

2222

datetime.timedelta(weeks=4),

2223

frozenset((token_day, token_end)))

2224

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

2225

datetime.timedelta(weeks=52),

2226

frozenset((token_month, token_end)))

2227

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

2228

datetime.timedelta(weeks=1),

2229

frozenset((token_end, )))

2230

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

2231

frozenset((token_year, token_month,

2232

token_day, token_time,

2233

token_week)))

2234

# Define starting values

2235

value = datetime.timedelta() # Value so far

2236

found_token = None

2237

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

2238

s = duration # String left to parse

2239

# Loop until end token is found

2240

while found_token is not token_end:

2241

# Search for any currently valid tokens

2242

for token in followers:

2243

match = token.regexp.match(s)

2244

if match is not None:

2245

# Token found

2246

if token.value is not None:

2247

# Value found, parse digits

2248

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

2249

# Add to value so far

2250

value += factor * token.value

2251

# Strip token from string

2252

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

2253

# Go to found token

2254

found_token = token

2255

# Set valid next tokens

2256

followers = found_token.followers

2257

break

2258

else:

2259

# No currently valid tokens were found

2260

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

2261

.format(duration))

2262

# End token found

2263

return value

2264

2265

2266

1602

def string_to_delta(interval):

2267

1603

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

2268

1604

2279

1615

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

2280

1616

datetime.timedelta(0, 330)

2281

1617

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

2288

1618

timevalue = datetime.timedelta(0)

2289

1619

for s in interval.split():

2290

1620

try:

2291

suffix = s[-1]

1621

suffix = unicode(s[-1])

2292

1622

value = int(s[:-1])

2293

1623

if suffix == "d":

2294

1624

delta = datetime.timedelta(value)

2301

1631

elif suffix == "w":

2302

1632

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

2303

1633

else:

2304

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

2305

except IndexError as e:

1634

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

1635

except (ValueError, IndexError) as e:

2306

1636

raise ValueError(*(e.args))

2307

1637

timevalue += delta

2308

1638

return timevalue

2309

1639

2310

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

2311

1665

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

2312

1666

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

2313

1667

2321

1675

sys.exit()

2322

1676

if not noclose:

2323

1677

# Close all standard open file descriptors

2324

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

1678

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

2325

1679

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

2326

1680

raise OSError(errno.ENODEV,

2327

"{} not a character device"

2328

.format(os.devnull))

1681

"%s not a character device"

1682

% os.path.devnull)

2329

1683

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

2330

1684

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

2331

1685

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

2340

1694

2341

1695

parser = argparse.ArgumentParser()

2342

1696

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

2343

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

1697

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

2344

1698

help="show version number and exit")

2345

1699

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

2346

1700

help="Bind to interface IF")

2352

1706

help="Run self-test")

2353

1707

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

2354

1708

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

2355

" to terminal", default=None)

1709

" to terminal")

2356

1710

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

2357

1711

help="Debug level for stdout output")

2358

1712

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

2365

1719

" files")

2366

1720

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

2367

1721

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

2368

" system bus interface", default=None)

1722

" system bus interface")

2369

1723

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

2370

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

2371

default=None)

2372

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

2373

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

2374

" state", default=None)

2375

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

2376

help="Specify a file descriptor to a network"

2377

" socket to use instead of creating one")

2378

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

2379

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

2380

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

2381

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

2382

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

2383

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

2384

default=None)

2385

1724

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

2386

1725

options = parser.parse_args()

2387

1726

2388

1727

if options.check:

2389

1728

import doctest

2390

fail_count, test_count = doctest.testmod()

2391

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

1729

doctest.testmod()

1730

sys.exit()

2392

1731

2393

1732

# Default values for config file for server-global settings

2394

1733

server_defaults = { "interface": "",

2396

1735

"port": "",

2397

1736

"debug": "False",

2398

1737

"priority":

2399

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

2400

":+SIGN-DSA-SHA256",

1738

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

2401

1739

"servicename": "Mandos",

2402

1740

"use_dbus": "True",

2403

1741

"use_ipv6": "True",

2404

1742

"debuglevel": "",

2405

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

1743

}

2411

1744

2412

1745

# Parse config file for server-global settings

2413

1746

server_config = configparser.SafeConfigParser(server_defaults)

2414

1747

del server_defaults

2415

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

1748

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

1749

"mandos.conf"))

2416

1750

# Convert the SafeConfigParser object to a dict

2417

1751

server_settings = server_config.defaults()

2418

1752

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

2419

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

1753

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

2420

1754

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

2421

1755

option)

2422

1756

if server_settings["port"]:

2423

1757

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

2424

1758

"port")

2425

if server_settings["socket"]:

2426

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

2427

"socket")

2428

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

2429

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

2430

# happen with a supplied network socket.

2431

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

2432

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

2433

["socket"])

2434

1759

del server_config

2435

1760

2436

1761

# Override the settings from the config file with command line

2437

1762

# options, if set.

2438

1763

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

2439

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

2440

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

2441

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

1764

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

1765

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

2442

1766

value = getattr(options, option)

2443

1767

if value is not None:

2444

1768

server_settings[option] = value

2445

1769

del options

2446

1770

# Force all strings to be unicode

2447

1771

for option in server_settings.keys():

2448

if isinstance(server_settings[option], bytes):

2449

server_settings[option] = (server_settings[option]

2450

.decode("utf-8"))

2451

# Force all boolean options to be boolean

2452

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

2453

"foreground", "zeroconf"):

2454

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

2455

# Debug implies foreground

2456

if server_settings["debug"]:

2457

server_settings["foreground"] = True

1772

if type(server_settings[option]) is str:

1773

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

2458

1774

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

2459

1775

2460

1776

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

2461

1777

2462

if (not server_settings["zeroconf"]

2463

and not (server_settings["port"]

2464

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

2465

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

2466

2467

1778

# For convenience

2468

1779

debug = server_settings["debug"]

2469

1780

debuglevel = server_settings["debuglevel"]

2470

1781

use_dbus = server_settings["use_dbus"]

2471

1782

use_ipv6 = server_settings["use_ipv6"]

2472

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

2473

stored_state_file)

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2476

2477

if debug:

2478

initlogger(debug, logging.DEBUG)

2479

else:

2480

if not debuglevel:

2481

initlogger(debug)

2482

else:

2483

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

2484

initlogger(debug, level)

2485

1783

2486

1784

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

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

1785

syslogger.setFormatter(logging.Formatter

1786

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

1787

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

1788

% server_settings["servicename"]))

2491

1789

2492

1790

# Parse config file with clients

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2495

1799

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

2496

1800

"clients.conf"))

2497

1801

2498

1802

global mandos_dbus_service

2499

1803

mandos_dbus_service = None

2500

1804

2501

socketfd = None

2502

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

2503

socketfd = server_settings["socket"]

2504

tcp_server = MandosServer(

2505

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

2506

ClientHandler,

2507

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

2508

use_ipv6=use_ipv6,

2509

gnutls_priority=server_settings["priority"],

2510

use_dbus=use_dbus,

2511

socketfd=socketfd)

2512

if not foreground:

2513

pidfilename = "/run/mandos.pid"

2514

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

2515

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

2516

pidfile = None

1805

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

1806

server_settings["port"]),

1807

ClientHandler,

1808

interface=(server_settings["interface"]

1809

or None),

1810

use_ipv6=use_ipv6,

1811

gnutls_priority=

1812

server_settings["priority"],

1813

use_dbus=use_dbus)

1814

if not debug:

1815

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

2517

1816

try:

2518

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

2519

except IOError as e:

2520

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

2521

exc_info=e)

1817

pidfile = open(pidfilename, "w")

1818

except IOError:

1819

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

2522

1820

2523

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

1821

try:

1822

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

1823

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

1824

except KeyError:

2524

1825

try:

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

1826

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

1827

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

2528

1828

except KeyError:

2529

continue

2530

else:

2531

uid = 65534

2532

gid = 65534

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2533

1835

try:

2534

1836

os.setgid(gid)

2535

1837

os.setuid(uid)

2536

1838

except OSError as error:

2537

if error.errno != errno.EPERM:

2538

raise

1839

if error[0] != errno.EPERM:

1840

raise error

2539

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2540

1850

if debug:

2541

1851

# Enable all possible GnuTLS debugging

2542

1852

2548

1858

def debug_gnutls(level, string):

2549

1859

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

2550

1860

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

1861

(gnutls.library.functions

1862

.gnutls_global_set_log_function(debug_gnutls))

2553

1863

2554

1864

# Redirect stdin so all checkers get /dev/null

2555

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

1865

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

2556

1866

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

2557

1867

if null > 2:

2558

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

2559

1872

2560

1873

# Need to fork before connecting to D-Bus

2561

if not foreground:

1874

if not debug:

2562

1875

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

2563

1876

daemon()

2564

1877

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2568

2569

1878

global main_loop

2570

1879

# From the Avahi example code

2571

DBusGMainLoop(set_as_default=True)

1880

DBusGMainLoop(set_as_default=True )

2572

1881

main_loop = gobject.MainLoop()

2573

1882

bus = dbus.SystemBus()

2574

1883

# End of Avahi example code

2575

1884

if use_dbus:

2576

1885

try:

2577

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

2578

bus,

2579

do_not_queue=True)

2580

old_bus_name = dbus.service.BusName(

2581

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

2582

do_not_queue=True)

2583

except dbus.exceptions.DBusException as e:

2584

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

1886

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

1887

bus, do_not_queue=True)

1888

except dbus.exceptions.NameExistsException as e:

1889

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

2585

1890

use_dbus = False

2586

1891

server_settings["use_dbus"] = False

2587

1892

tcp_server.use_dbus = False

2588

if zeroconf:

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

2595

if server_settings["interface"]:

2596

service.interface = if_nametoindex(

2597

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

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

1897

if server_settings["interface"]:

1898

service.interface = (if_nametoindex

1899

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

2598

1900

2599

1901

global multiprocessing_manager

2600

1902

multiprocessing_manager = multiprocessing.Manager()

2602

1904

client_class = Client

2603

1905

if use_dbus:

2604

1906

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

2605

2606

client_settings = Client.config_parser(client_config)

2607

old_client_settings = {}

2608

clients_data = {}

2609

2610

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

2611

global wnull

2612

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

2613

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

2614

# mode

2615

if debug or not foreground:

2616

wnull.close()

2617

2618

# Get client data and settings from last running state.

2619

if server_settings["restore"]:

2620

try:

2621

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2624

os.remove(stored_state_path)

2625

except IOError as e:

2626

if e.errno == errno.ENOENT:

2627

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

2628

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

2629

else:

2630

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

2631

exc_info=e)

2632

raise

2633

except EOFError as e:

2634

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

2635

"EOFError:",

2636

exc_info=e)

2637

2638

with PGPEngine() as pgp:

2639

for client_name, client in clients_data.items():

2640

# Skip removed clients

2641

if client_name not in client_settings:

2642

continue

2643

2644

# Decide which value to use after restoring saved state.

2645

# We have three different values: Old config file,

2646

# new config file, and saved state.

2647

# New config value takes precedence if it differs from old

2648

# config value, otherwise use saved state.

2649

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

2650

try:

2651

# For each value in new config, check if it

2652

# differs from the old config value (Except for

2653

# the "secret" attribute)

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2657

client[name] = value

2658

except KeyError:

2659

pass

2660

2661

# Clients who has passed its expire date can still be

2662

# enabled if its last checker was successful. A Client

2663

# whose checker succeeded before we stored its state is

2664

# assumed to have successfully run all checkers during

2665

# downtime.

2666

if client["enabled"]:

2667

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

2668

if not client["last_checked_ok"]:

2669

logger.warning(

2670

"disabling client {} - Client never "

2671

"performed a successful checker".format(

2672

client_name))

2673

client["enabled"] = False

2674

elif client["last_checker_status"] != 0:

2675

logger.warning(

2676

"disabling client {} - Client last"

2677

" checker failed with error code"

2678

" {}".format(

2679

client_name,

2680

client["last_checker_status"]))

2681

client["enabled"] = False

2682

else:

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2686

logger.debug("Last checker succeeded,"

2687

" keeping {} enabled".format(

2688

client_name))

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

2689

1914

try:

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2693

except PGPError:

2694

# If decryption fails, we use secret from new settings

2695

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

2696

client_name))

2697

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

2698

["secret"])

2699

2700

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

2701

for client_name in (set(old_client_settings)

2702

- set(client_settings)):

2703

del clients_data[client_name]

2704

for client_name in (set(client_settings)

2705

- set(old_client_settings)):

2706

clients_data[client_name] = client_settings[client_name]

2707

2708

# Create all client objects

2709

for client_name, client in clients_data.items():

2710

tcp_server.clients[client_name] = client_class(

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2714

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

2715

1924

if not tcp_server.clients:

2716

1925

logger.warning("No clients defined")

2717

2718

if not foreground:

2719

if pidfile is not None:

2720

pid = os.getpid()

2721

try:

2722

with pidfile:

2723

print(pid, file=pidfile)

2724

except IOError:

2725

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

2726

pidfilename, pid)

2727

del pidfile

1926

1927

if not debug:

1928

try:

1929

with pidfile:

1930

pid = os.getpid()

1931

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

1932

del pidfile

1933

except IOError:

1934

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

1935

pidfilename, pid)

1936

except NameError:

1937

# "pidfile" was never created

1938

pass

2728

1939

del pidfilename

2729

1940

1941

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

1942

2730

1943

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

2731

1944

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

2732

1945

2733

1946

if use_dbus:

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

1947

class MandosDBusService(dbus.service.Object):

2738

1948

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

2739

2740

1949

def __init__(self):

2741

1950

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

2742

2743

_interface = "se.recompile.Mandos"

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

1951

_interface = "se.bsnet.fukt.Mandos"

2750

1952

2751

1953

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

2752

1954

def ClientAdded(self, objpath):

2766

1968

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

2767

1969

def GetAllClients(self):

2768

1970

"D-Bus method"

2769

return dbus.Array(c.dbus_object_path for c in

2770

tcp_server.clients.itervalues())

1971

return dbus.Array(c.dbus_object_path

1972

for c in tcp_server.clients)

2771

1973

2772

1974

@dbus.service.method(_interface,

2773

1975

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

2774

1976

def GetAllClientsWithProperties(self):

2775

1977

"D-Bus method"

2776

1978

return dbus.Dictionary(

2777

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

2778

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

1979

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

1980

for c in tcp_server.clients),

2779

1981

signature="oa{sv}")

2780

1982

2781

1983

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

2782

1984

def RemoveClient(self, object_path):

2783

1985

"D-Bus method"

2784

for c in tcp_server.clients.itervalues():

1986

for c in tcp_server.clients:

2785

1987

if c.dbus_object_path == object_path:

2786

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

2787

1989

c.remove_from_connection()

2788

1990

# Don't signal anything except ClientRemoved

2789

1991

c.disable(quiet=True)

2798

2000

2799

2001

def cleanup():

2800

2002

"Cleanup function; run on exit"

2801

if zeroconf:

2802

service.cleanup()

2803

2804

multiprocessing.active_children()

2805

wnull.close()

2806

if not (tcp_server.clients or client_settings):

2807

return

2808

2809

# Store client before exiting. Secrets are encrypted with key

2810

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

2811

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

2812

clients = {}

2813

with PGPEngine() as pgp:

2814

for client in tcp_server.clients.itervalues():

2815

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

2816

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

2817

key)

2818

client_dict = {}

2819

2820

# A list of attributes that can not be pickled

2821

# + secret.

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2826

exclude.add(name)

2827

2828

client_dict["encrypted_secret"] = (client

2829

.encrypted_secret)

2830

for attr in client.client_structure:

2831

if attr not in exclude:

2832

client_dict[attr] = getattr(client, attr)

2833

2834

clients[client.name] = client_dict

2835

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

2836

2837

try:

2838

with tempfile.NamedTemporaryFile(

2839

mode='wb',

2840

suffix=".pickle",

2841

prefix='clients-',

2842

dir=os.path.dirname(stored_state_path),

2843

delete=False) as stored_state:

2844

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

2845

tempname = stored_state.name

2846

os.rename(tempname, stored_state_path)

2847

except (IOError, OSError) as e:

2848

if not debug:

2849

try:

2850

os.remove(tempname)

2851

except NameError:

2852

pass

2853

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

2854

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

2855

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

2856

else:

2857

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

2858

exc_info=e)

2859

raise

2860

2861

# Delete all clients, and settings from config

2003

service.cleanup()

2004

2862

2005

while tcp_server.clients:

2863

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

2864

2007

if use_dbus:

2865

2008

client.remove_from_connection()

2009

client.disable_hook = None

2866

2010

# Don't signal anything except ClientRemoved

2867

2011

client.disable(quiet=True)

2868

2012

if use_dbus:

2869

2013

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2872

client_settings.clear()

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2015

client.name)

2873

2016

2874

2017

atexit.register(cleanup)

2875

2018

2876

for client in tcp_server.clients.itervalues():

2019

for client in tcp_server.clients:

2877

2020

if use_dbus:

2878

2021

# Emit D-Bus signal

2879

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2880

# Need to initiate checking of clients

2881

if client.enabled:

2882

client.init_checker()

2023

client.enable()

2883

2024

2884

2025

tcp_server.enable()

2885

2026

tcp_server.server_activate()

2886

2027

2887

2028

# Find out what port we got

2888

if zeroconf:

2889

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

2029

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

2890

2030

if use_ipv6:

2891

2031

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

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

2894

2034

else: # IPv4

2895

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

2896

*tcp_server.socket.getsockname())

2035

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

2036

% tcp_server.socket.getsockname())

2897

2037

2898

2038

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

2899

2039

2900

2040

try:

2901

if zeroconf:

2902

# From the Avahi example code

2903

try:

2904

service.activate()

2905

except dbus.exceptions.DBusException as error:

2906

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

2907

cleanup()

2908

sys.exit(1)

2909

# End of Avahi example code

2041

# From the Avahi example code

2042

try:

2043

service.activate()

2044

except dbus.exceptions.DBusException as error:

2045

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

2046

cleanup()

2047

sys.exit(1)

2048

# End of Avahi example code

2910

2049

2911

2050

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

2912

2051

lambda *args, **kwargs:

2916

2055

logger.debug("Starting main loop")

2917

2056

main_loop.run()

2918

2057

except AvahiError as error:

2919

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

2058

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

2920

2059

cleanup()

2921

2060

sys.exit(1)

2922

2061

except KeyboardInterrupt:

2927

2066

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

2928

2067

cleanup()

2929

2068

2930

2931

2069

if __name__ == '__main__':

2932

2070

main()