/mandos/release : revision 237.7.329

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.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):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = 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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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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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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str(error))

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

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def cleanup(self):

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

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if self.group is not None:

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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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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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

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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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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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

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self.cleanup()

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397

elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

logger.info("Local Zeroconf service name"

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" collision.")

405

return self.rename(remove=False)

406

else:

407

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

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self.cleanup()

409

os._exit(1)

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else:

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if error is None:

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412

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

253

413

else:

254

414

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

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416

def activate(self):

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

257

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if self.server is None:

261

422

follow_name_owner_changes=True),

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423

avahi.DBUS_INTERFACE_SERVER)

263

424

self.server.connect_to_signal("StateChanged",

264

self.server_state_changed)

425

self.server_state_changed)

265

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

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427

267

428

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def _timedelta_to_milliseconds(td):

269

"Convert a datetime.timedelta() to milliseconds"

270

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

271

+ (td.seconds * 1000)

272

+ (td.microseconds // 1000))

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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

274

448

class Client(object):

275

449

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

276

450

277

451

Attributes:

278

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

452

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

279

453

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

280

454

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

281

455

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

288

462

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

289

463

checker_initiator_tag: a gobject event source tag, or None

290

464

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

291

467

current_checker_command: string; current running checker_command

292

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

293

468

disable_initiator_tag: a gobject event source tag, or None

294

469

enabled: bool()

295

470

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

298

473

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

299

474

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

300

475

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

301

last_enabled: datetime.datetime(); (UTC)

476

last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

302

482

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

303

483

D-Bus identifiers

304

484

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

305

485

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

306

486

until this client is disabled

307

extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

308

488

runtime_expansions: Allowed attributes for runtime expansion.

309

489

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

310

490

disabled, or None

491

server_settings: The server_settings dict from main()

311

492

"""

312

493

313

494

runtime_expansions = ("approval_delay", "approval_duration",

314

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

315

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

495

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

496

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

497

"last_approval_request", "last_checked_ok",

316

498

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

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return _timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

attribute."""

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

511

@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):

337

562

self.name = name

338

if config is None:

339

config = {}

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

340

580

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

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

345

.replace(" ", ""))

346

581

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

367

586

self.checker = None

368

587

self.checker_initiator_tag = None

369

588

self.disable_initiator_tag = None

370

self.expires = None

371

589

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

590

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

591

self.approved = None

378

592

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

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)

384

604

605

# Send notice to process children that client state has changed

385

606

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

607

with self.changedstate:

608

self.changedstate.notify_all()

609

390

610

def enable(self):

391

611

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

392

612

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

393

613

# Already enabled

394

614

return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

402

615

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

406

616

self.enabled = True

407

617

self.last_enabled = datetime.datetime.utcnow()

408

# Also start a new checker *right now*.

409

self.start_checker()

618

self.init_checker()

619

self.send_changedstate()

410

620

411

621

def disable(self, quiet=True):

412

622

"""Disable this client."""

413

623

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

414

624

return False

415

625

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

626

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

419

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

627

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

420

628

gobject.source_remove(self.disable_initiator_tag)

421

629

self.disable_initiator_tag = None

422

630

self.expires = None

423

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

631

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

424

632

gobject.source_remove(self.checker_initiator_tag)

425

633

self.checker_initiator_tag = None

426

634

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

635

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

430

638

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

431

639

return False

432

640

433

641

def __del__(self):

434

self.disable_hook = None

435

642

self.disable()

436

643

437

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

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):

438

662

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

439

663

self.checker_callback_tag = None

440

664

self.checker = None

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

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:

444

673

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

445

674

vars(self))

446

675

self.checked_ok()

447

676

else:

448

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

449

vars(self))

677

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

450

678

else:

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

451

681

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

452

682

vars(self))

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

683

return False

684

685

def checked_ok(self):

686

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

687

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."""

460

694

if timeout is None:

461

695

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

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

468

703

469

704

def need_approval(self):

470

705

self.last_approval_request = datetime.datetime.utcnow()

475

710

If a checker already exists, leave it running and do

476

711

nothing."""

477

712

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

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

482

717

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

483

718

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

484

719

# should be.

485

720

486

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

487

try:

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

self.current_checker_command)

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

499

725

# Start a new checker if needed

500

726

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 }

501

731

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

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

520

738

self.current_checker_command = command

521

try:

522

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

523

command, self.name)

524

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

525

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

526

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

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

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

543

error)

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)

544

764

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

545

765

return True

546

766

552

772

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

553

773

return

554

774

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

555

try:

556

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

557

#time.sleep(0.5)

558

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

559

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

560

except OSError as error:

561

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

562

raise

775

self.checker.terminate()

563

776

self.checker = None

564

777

565

778

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

568

783

"""Decorators for marking methods of a DBusObjectWithProperties to

569

784

become properties on the D-Bus.

570

785

579

794

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

580

795

if byte_arrays and signature != "ay":

581

796

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

582

" signature %r" % signature)

797

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

798

583

799

def decorator(func):

584

800

func._dbus_is_property = True

585

801

func._dbus_interface = dbus_interface

590

806

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

591

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

592

808

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

593

851

return decorator

594

852

595

853

596

854

class DBusPropertyException(dbus.exceptions.DBusException):

597

855

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

598

856

"""

599

def __unicode__(self):

600

return unicode(str(self))

857

pass

601

858

602

859

603

860

class DBusPropertyAccessException(DBusPropertyException):

621

878

"""

622

879

623

880

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

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)

626

889

627

def _get_all_dbus_properties(self):

890

def _get_all_dbus_things(self, thing):

628

891

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

629

892

"""

630

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

893

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

894

athing.__get__(self))

631

895

for cls in self.__class__.__mro__

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

896

for name, athing in

897

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

633

898

634

899

def _get_dbus_property(self, interface_name, property_name):

635

900

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

636

901

property with the specified name and interface.

637

902

"""

638

for cls in self.__class__.__mro__:

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

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):

641

908

return value.__get__(self)

642

909

643

910

# No such property

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

911

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

912

self.dbus_object_path, interface_name, property_name))

647

913

648

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

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

649

916

out_signature="v")

650

917

def Get(self, interface_name, property_name):

651

918

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

669

936

# The byte_arrays option is not supported yet on

670

937

# signatures other than "ay".

671

938

if prop._dbus_signature != "ay":

672

raise ValueError

673

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

674

for byte in value))

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))

675

944

prop(value)

676

945

677

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

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

678

948

out_signature="a{sv}")

679

949

def GetAll(self, interface_name):

680

950

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

682

952

683

953

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

684

954

"""

685

all = {}

686

for name, prop in self._get_all_dbus_properties():

955

properties = {}

956

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

687

957

if (interface_name

688

958

and interface_name != prop._dbus_interface):

689

959

# Interface non-empty but did not match

693

963

continue

694

964

value = prop()

695

965

if not hasattr(value, "variant_level"):

696

all[name] = value

966

properties[name] = value

697

967

continue

698

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

699

value.variant_level+1)

700

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

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

701

979

702

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

703

981

out_signature="s",

704

982

path_keyword='object_path',

705

983

connection_keyword='connection')

706

984

def Introspect(self, object_path, connection):

707

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

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

708

988

"""

709

989

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

710

990

connection)

711

991

try:

712

992

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

993

713

994

def make_tag(document, name, prop):

714

995

e = document.createElement("property")

715

996

e.setAttribute("name", name)

716

997

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

717

998

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

718

999

return e

1000

719

1001

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

1002

# Add property tags

720

1003

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

721

1004

for name, prop

722

in self._get_all_dbus_properties()

1005

in self._get_all_dbus_things("property")

723

1006

if prop._dbus_interface

724

1007

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

725

1008

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)

726

1038

# Add the names to the return values for the

727

1039

# "org.freedesktop.DBus.Properties" methods

728

1040

if (if_tag.getAttribute("name")

743

1055

except (AttributeError, xml.dom.DOMException,

744

1056

xml.parsers.expat.ExpatError) as error:

745

1057

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

746

error)

1058

exc_info=error)

747

1059

return xmlstring

748

1060

749

1061

750

def datetime_to_dbus (dt, variant_level=0):

1062

def datetime_to_dbus(dt, variant_level=0):

751

1063

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

752

1064

if dt is None:

753

1065

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

754

return dbus.String(dt.isoformat(),

755

variant_level=variant_level)

756

757

class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):

758

"""Applied to an empty subclass of a D-Bus object, this metaclass

759

will add additional D-Bus attributes matching a certain pattern.

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).

760

1091

"""

761

def __new__(mcs, name, bases, attr):

762

# Go through all the base classes which could have D-Bus

763

# methods, signals, or properties in them

764

for base in (b for b in bases

765

if issubclass(b, dbus.service.Object)):

766

# Go though all attributes of the base class

767

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

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):

768

1100

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

769

1101

# with the wrong interface name

770

1102

if (not hasattr(attribute, "_dbus_interface")

771

or not attribute._dbus_interface

772

.startswith("se.recompile.Mandos")):

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

773

1105

continue

774

1106

# Create an alternate D-Bus interface name based on

775

1107

# the current name

776

alt_interface = (attribute._dbus_interface

777

.replace("se.recompile.Mandos",

778

"se.bsnet.fukt.Mandos"))

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

779

1111

# Is this a D-Bus signal?

780

1112

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

781

# Extract the original non-method function by

782

# black magic

783

nonmethod_func = (dict(

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

784

1117

zip(attribute.func_code.co_freevars,

785

attribute.__closure__))["func"]

786

.cell_contents)

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

787

1122

# Create a new, but exactly alike, function

788

1123

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

789

1124

# with the alternate D-Bus interface name

790

new_function = (dbus.service.signal

791

(alt_interface,

792

attribute._dbus_signature)

793

(types.FunctionType(

794

nonmethod_func.func_code,

795

nonmethod_func.func_globals,

796

nonmethod_func.func_name,

797

nonmethod_func.func_defaults,

798

nonmethod_func.func_closure)))

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

799

1148

# Define a creator of a function to call both the

800

# old and new functions, so both the old and new

801

# signals gets sent when the function is called

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

802

1152

def fixscope(func1, func2):

803

1153

"""This function is a scope container to pass

804

1154

func1 and func2 to the "call_both" function

805

1155

outside of its arguments"""

1156

806

1157

def call_both(*args, **kwargs):

807

1158

"""This function will emit two D-Bus

808

1159

signals by calling func1 and func2"""

809

1160

func1(*args, **kwargs)

810

1161

func2(*args, **kwargs)

1162

811

1163

return call_both

812

1164

# Create the "call_both" function and add it to

813

1165

# the class

814

attr[attrname] = fixscope(attribute,

815

new_function)

1166

attr[attrname] = fixscope(attribute, new_function)

816

1167

# Is this a D-Bus method?

817

1168

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

818

1169

# Create a new, but exactly alike, function

819

1170

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

820

1171

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

821

1172

# to the class.

822

attr[attrname] = (dbus.service.method

823

(alt_interface,

824

attribute._dbus_in_signature,

825

attribute._dbus_out_signature)

826

(types.FunctionType

827

(attribute.func_code,

828

attribute.func_globals,

829

attribute.func_name,

830

attribute.func_defaults,

831

attribute.func_closure)))

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

832

1189

# Is this a D-Bus property?

833

1190

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

834

1191

# Create a new, but exactly alike, function

835

1192

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

836

1193

# property with the alternate D-Bus interface

837

1194

# name. Add it to the class.

838

attr[attrname] = (dbus_service_property

839

(alt_interface,

840

attribute._dbus_signature,

841

attribute._dbus_access,

842

attribute

843

._dbus_get_args_options

844

["byte_arrays"])

845

(types.FunctionType

846

(attribute.func_code,

847

attribute.func_globals,

848

attribute.func_name,

849

attribute.func_defaults,

850

attribute.func_closure)))

851

return type.__new__(mcs, name, bases, attr)

852

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"})

853

1252

class ClientDBus(Client, DBusObjectWithProperties):

854

1253

"""A Client class using D-Bus

855

1254

859

1258

"""

860

1259

861

1260

runtime_expansions = (Client.runtime_expansions

862

+ ("dbus_object_path",))

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

863

1264

864

1265

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

865

1266

866

1267

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

867

self._approvals_pending = 0

868

1268

self.bus = bus

869

1269

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

870

1270

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

871

1271

# the D-Bus

872

client_object_name = unicode(self.name).translate(

1272

client_object_name = str(self.name).translate(

873

1273

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

874

1274

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

875

self.dbus_object_path = (dbus.ObjectPath

876

("/clients/" + client_object_name))

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

877

1277

DBusObjectWithProperties.__init__(self, self.bus,

878

1278

self.dbus_object_path)

879

880

def notifychangeproperty(transform_func,

881

dbus_name, type_func=lambda x: x,

882

variant_level=1):

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):

883

1285

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

884

1286

its changes to DBus.

885

886

transform_fun: Function that takes a value and transforms it

887

to a D-Bus type.

1287

1288

transform_fun: Function that takes a value and a variant_level

1289

and transforms it to a D-Bus type.

888

1290

dbus_name: D-Bus name of the variable

889

1291

type_func: Function that transform the value before sending it

890

1292

to the D-Bus. Default: no transform

891

1293

variant_level: D-Bus variant level. Default: 1

892

1294

"""

893

real_value = [None,]

1295

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

1296

894

1297

def setter(self, value):

895

old_value = real_value[0]

896

real_value[0] = value

897

1298

if hasattr(self, "dbus_object_path"):

898

if type_func(old_value) != type_func(real_value[0]):

899

dbus_value = transform_func(type_func(real_value[0]),

900

variant_level)

901

self.PropertyChanged(dbus.String(dbus_name),

902

dbus_value)

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)

903

1318

904

return property(lambda self: real_value[0], setter)

905

1319

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

906

1320

907

1321

expires = notifychangeproperty(datetime_to_dbus, "Expires")

908

1322

approvals_pending = notifychangeproperty(dbus.Boolean,

911

1325

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

912

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

913

1327

"LastEnabled")

914

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

915

type_func = lambda checker: checker is not None)

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

916

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

917

1332

"LastCheckedOK")

918

last_approval_request = notifychangeproperty(datetime_to_dbus,

919

"LastApprovalRequest")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1335

last_approval_request = notifychangeproperty(

1336

datetime_to_dbus, "LastApprovalRequest")

920

1337

approved_by_default = notifychangeproperty(dbus.Boolean,

921

1338

"ApprovedByDefault")

922

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

923

type_func = _timedelta_to_milliseconds)

924

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

925

type_func = _timedelta_to_milliseconds)

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)

926

1345

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

927

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

928

type_func = _timedelta_to_milliseconds)

929

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

930

type_func = _timedelta_to_milliseconds)

931

interval = notifychangeproperty(dbus.UInt16, "Interval",

932

type_func = _timedelta_to_milliseconds)

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)

933

1355

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

1356

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

1357

invalidate_only=True)

934

1358

935

1359

del notifychangeproperty

936

1360

943

1367

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

944

1368

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

945

1369

946

def checker_callback(self, pid, condition, command,

947

*args, **kwargs):

948

self.checker_callback_tag = None

949

self.checker = None

950

if os.WIFEXITED(condition):

951

exitstatus = os.WEXITSTATUS(condition)

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:

952

1377

# Emit D-Bus signal

953

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

954

dbus.Int64(condition),

1379

dbus.Int64(0),

955

1380

dbus.String(command))

956

1381

else:

957

1382

# Emit D-Bus signal

958

1383

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

959

dbus.Int64(condition),

1384

dbus.Int64(

1385

self.last_checker_signal),

960

1386

dbus.String(command))

961

962

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

963

*args, **kwargs)

1387

return ret

964

1388

965

1389

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

966

old_checker = self.checker

967

if self.checker is not None:

968

old_checker_pid = self.checker.pid

969

else:

970

old_checker_pid = None

1390

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

971

1391

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

972

1392

# Only if new checker process was started

973

1393

if (self.checker is not None

977

1397

return r

978

1398

979

1399

def _reset_approved(self):

980

self._approved = None

1400

self.approved = None

981

1401

return False

982

1402

983

1403

def approve(self, value=True):

1404

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

984

1407

self.send_changedstate()

985

self._approved = value

986

gobject.timeout_add(_timedelta_to_milliseconds

987

(self.approval_duration),

988

self._reset_approved)

989

990

1408

991

1409

## D-Bus methods, signals & properties

992

_interface = "se.recompile.Mandos.Client"

1410

1411

## Interfaces

993

1412

994

1413

## Signals

995

1414

1006

1425

pass

1007

1426

1008

1427

# PropertyChanged - signal

1428

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

1009

1429

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

1010

1430

def PropertyChanged(self, property, value):

1011

1431

"D-Bus signal"

1045

1465

self.checked_ok()

1046

1466

1047

1467

# Enable - method

1468

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

1048

1469

@dbus.service.method(_interface)

1049

1470

def Enable(self):

1050

1471

"D-Bus method"

1051

1472

self.enable()

1052

1473

1053

1474

# StartChecker - method

1475

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

1054

1476

@dbus.service.method(_interface)

1055

1477

def StartChecker(self):

1056

1478

"D-Bus method"

1057

1479

self.start_checker()

1058

1480

1059

1481

# Disable - method

1482

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

1060

1483

@dbus.service.method(_interface)

1061

1484

def Disable(self):

1062

1485

"D-Bus method"

1063

1486

self.disable()

1064

1487

1065

1488

# StopChecker - method

1489

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

1066

1490

@dbus.service.method(_interface)

1067

1491

def StopChecker(self):

1068

1492

self.stop_checker()

1075

1499

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

1076

1500

1077

1501

# ApprovedByDefault - property

1078

@dbus_service_property(_interface, signature="b",

1502

@dbus_service_property(_interface,

1503

signature="b",

1079

1504

access="readwrite")

1080

1505

def ApprovedByDefault_dbus_property(self, value=None):

1081

1506

if value is None: # get

1083

1508

self.approved_by_default = bool(value)

1084

1509

1085

1510

# ApprovalDelay - property

1086

@dbus_service_property(_interface, signature="t",

1511

@dbus_service_property(_interface,

1512

signature="t",

1087

1513

access="readwrite")

1088

1514

def ApprovalDelay_dbus_property(self, value=None):

1089

1515

if value is None: # get

1090

return dbus.UInt64(self.approval_delay_milliseconds())

1516

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

1517

* 1000)

1091

1518

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

1092

1519

1093

1520

# ApprovalDuration - property

1094

@dbus_service_property(_interface, signature="t",

1521

@dbus_service_property(_interface,

1522

signature="t",

1095

1523

access="readwrite")

1096

1524

def ApprovalDuration_dbus_property(self, value=None):

1097

1525

if value is None: # get

1098

return dbus.UInt64(_timedelta_to_milliseconds(

1099

self.approval_duration))

1526

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

1527

* 1000)

1100

1528

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

1101

1529

1102

1530

# Name - property

1531

@dbus_annotations(

1532

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1103

1533

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

1104

1534

def Name_dbus_property(self):

1105

1535

return dbus.String(self.name)

1106

1536

1107

1537

# Fingerprint - property

1538

@dbus_annotations(

1539

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1108

1540

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

1109

1541

def Fingerprint_dbus_property(self):

1110

1542

return dbus.String(self.fingerprint)

1111

1543

1112

1544

# Host - property

1113

@dbus_service_property(_interface, signature="s",

1545

@dbus_service_property(_interface,

1546

signature="s",

1114

1547

access="readwrite")

1115

1548

def Host_dbus_property(self, value=None):

1116

1549

if value is None: # get

1117

1550

return dbus.String(self.host)

1118

self.host = value

1551

self.host = str(value)

1119

1552

1120

1553

# Created - property

1554

@dbus_annotations(

1555

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1121

1556

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

1122

1557

def Created_dbus_property(self):

1123

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

1558

return datetime_to_dbus(self.created)

1124

1559

1125

1560

# LastEnabled - property

1126

1561

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

1128

1563

return datetime_to_dbus(self.last_enabled)

1129

1564

1130

1565

# Enabled - property

1131

@dbus_service_property(_interface, signature="b",

1566

@dbus_service_property(_interface,

1567

signature="b",

1132

1568

access="readwrite")

1133

1569

def Enabled_dbus_property(self, value=None):

1134

1570

if value is None: # get

1139

1575

self.disable()

1140

1576

1141

1577

# LastCheckedOK - property

1142

@dbus_service_property(_interface, signature="s",

1578

@dbus_service_property(_interface,

1579

signature="s",

1143

1580

access="readwrite")

1144

1581

def LastCheckedOK_dbus_property(self, value=None):

1145

1582

if value is not None:

1147

1584

return

1148

1585

return datetime_to_dbus(self.last_checked_ok)

1149

1586

1587

# LastCheckerStatus - property

1588

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

1589

def LastCheckerStatus_dbus_property(self):

1590

return dbus.Int16(self.last_checker_status)

1591

1150

1592

# Expires - property

1151

1593

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

1152

1594

def Expires_dbus_property(self):

1158

1600

return datetime_to_dbus(self.last_approval_request)

1159

1601

1160

1602

# Timeout - property

1161

@dbus_service_property(_interface, signature="t",

1603

@dbus_service_property(_interface,

1604

signature="t",

1162

1605

access="readwrite")

1163

1606

def Timeout_dbus_property(self, value=None):

1164

1607

if value is None: # get

1165

return dbus.UInt64(self.timeout_milliseconds())

1608

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

1609

old_timeout = self.timeout

1166

1610

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

1167

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

1168

return

1169

# Reschedule timeout

1170

gobject.source_remove(self.disable_initiator_tag)

1171

self.disable_initiator_tag = None

1172

self.expires = None

1173

time_to_die = (self.

1174

_timedelta_to_milliseconds((self

1175

.last_checked_ok

1176

+ self.timeout)

1177

- datetime.datetime

1178

.utcnow()))

1179

if time_to_die <= 0:

1180

# The timeout has passed

1181

self.disable()

1182

else:

1183

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

1184

+ datetime.timedelta(milliseconds = time_to_die))

1185

self.disable_initiator_tag = (gobject.timeout_add

1186

(time_to_die, self.disable))

1611

# Reschedule disabling

1612

if self.enabled:

1613

now = datetime.datetime.utcnow()

1614

self.expires += self.timeout - old_timeout

1615

if self.expires <= now:

1616

# The timeout has passed

1617

self.disable()

1618

else:

1619

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

1620

is None):

1621

return

1622

gobject.source_remove(self.disable_initiator_tag)

1623

self.disable_initiator_tag = gobject.timeout_add(

1624

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

1625

self.disable)

1187

1626

1188

1627

# ExtendedTimeout - property

1189

@dbus_service_property(_interface, signature="t",

1628

@dbus_service_property(_interface,

1629

signature="t",

1190

1630

access="readwrite")

1191

1631

def ExtendedTimeout_dbus_property(self, value=None):

1192

1632

if value is None: # get

1193

return dbus.UInt64(self.extended_timeout_milliseconds())

1633

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

1634

* 1000)

1194

1635

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

1195

1636

1196

1637

# Interval - property

1197

@dbus_service_property(_interface, signature="t",

1638

@dbus_service_property(_interface,

1639

signature="t",

1198

1640

access="readwrite")

1199

1641

def Interval_dbus_property(self, value=None):

1200

1642

if value is None: # get

1201

return dbus.UInt64(self.interval_milliseconds())

1643

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

1202

1644

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

1203

1645

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

1204

1646

return

1205

# Reschedule checker run

1206

gobject.source_remove(self.checker_initiator_tag)

1207

self.checker_initiator_tag = (gobject.timeout_add

1208

(value, self.start_checker))

1209

self.start_checker() # Start one now, too

1647

if self.enabled:

1648

# Reschedule checker run

1649

gobject.source_remove(self.checker_initiator_tag)

1650

self.checker_initiator_tag = gobject.timeout_add(

1651

value, self.start_checker)

1652

self.start_checker() # Start one now, too

1210

1653

1211

1654

# Checker - property

1212

@dbus_service_property(_interface, signature="s",

1655

@dbus_service_property(_interface,

1656

signature="s",

1213

1657

access="readwrite")

1214

1658

def Checker_dbus_property(self, value=None):

1215

1659

if value is None: # get

1216

1660

return dbus.String(self.checker_command)

1217

self.checker_command = value

1661

self.checker_command = str(value)

1218

1662

1219

1663

# CheckerRunning - property

1220

@dbus_service_property(_interface, signature="b",

1664

@dbus_service_property(_interface,

1665

signature="b",

1221

1666

access="readwrite")

1222

1667

def CheckerRunning_dbus_property(self, value=None):

1223

1668

if value is None: # get

1228

1673

self.stop_checker()

1229

1674

1230

1675

# ObjectPath - property

1676

@dbus_annotations(

1677

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1231

1678

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

1232

1679

def ObjectPath_dbus_property(self):

1233

1680

return self.dbus_object_path # is already a dbus.ObjectPath

1234

1681

1235

1682

# Secret = property

1236

@dbus_service_property(_interface, signature="ay",

1237

access="write", byte_arrays=True)

1683

@dbus_annotations(

1684

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

1685

"invalidates"})

1686

@dbus_service_property(_interface,

1687

signature="ay",

1688

access="write",

1689

byte_arrays=True)

1238

1690

def Secret_dbus_property(self, value):

1239

self.secret = str(value)

1691

self.secret = bytes(value)

1240

1692

1241

1693

del _interface

1242

1694

1246

1698

self._pipe = child_pipe

1247

1699

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

1248

1700

if not self._pipe.recv():

1249

raise KeyError()

1701

raise KeyError(fpr)

1250

1702

1251

1703

def __getattribute__(self, name):

1252

if(name == '_pipe'):

1704

if name == '_pipe':

1253

1705

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

1254

1706

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

1255

1707

data = self._pipe.recv()

1256

1708

if data[0] == 'data':

1257

1709

return data[1]

1258

1710

if data[0] == 'function':

1711

1259

1712

def func(*args, **kwargs):

1260

1713

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

1261

1714

return self._pipe.recv()[1]

1715

1262

1716

return func

1263

1717

1264

1718

def __setattr__(self, name, value):

1265

if(name == '_pipe'):

1719

if name == '_pipe':

1266

1720

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

1267

1721

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

1268

1722

1269

class ClientDBusTransitional(ClientDBus):

1270

__metaclass__ = AlternateDBusNamesMetaclass

1271

1723

1272

1724

class ClientHandler(socketserver.BaseRequestHandler, object):

1273

1725

"""A class to handle client connections.

1278

1730

def handle(self):

1279

1731

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

1280

1732

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

1281

unicode(self.client_address))

1733

str(self.client_address))

1282

1734

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

1283

1735

self.server.child_pipe.fileno())

1284

1736

1285

session = (gnutls.connection

1286

.ClientSession(self.request,

1287

gnutls.connection

1288

.X509Credentials()))

1737

session = gnutls.connection.ClientSession(

1738

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

1289

1739

1290

1740

# Note: gnutls.connection.X509Credentials is really a

1291

1741

# generic GnuTLS certificate credentials object so long as

1300

1750

priority = self.server.gnutls_priority

1301

1751

if priority is None:

1302

1752

priority = "NORMAL"

1303

(gnutls.library.functions

1304

.gnutls_priority_set_direct(session._c_object,

1305

priority, None))

1753

gnutls.library.functions.gnutls_priority_set_direct(

1754

session._c_object, priority, None)

1306

1755

1307

1756

# Start communication using the Mandos protocol

1308

1757

# Get protocol number

1310

1759

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

1311

1760

try:

1312

1761

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

1313

raise RuntimeError

1762

raise RuntimeError(line)

1314

1763

except (ValueError, IndexError, RuntimeError) as error:

1315

1764

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

1316

1765

return

1328

1777

approval_required = False

1329

1778

try:

1330

1779

try:

1331

fpr = self.fingerprint(self.peer_certificate

1332

(session))

1780

fpr = self.fingerprint(

1781

self.peer_certificate(session))

1333

1782

except (TypeError,

1334

1783

gnutls.errors.GNUTLSError) as error:

1335

1784

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

1350

1799

while True:

1351

1800

if not client.enabled:

1352

1801

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

1353

client.name)

1802

client.name)

1354

1803

if self.server.use_dbus:

1355

1804

# Emit D-Bus signal

1356

client.Rejected("Disabled")

1805

client.Rejected("Disabled")

1357

1806

return

1358

1807

1359

if client._approved or not client.approval_delay:

1808

if client.approved or not client.approval_delay:

1360

1809

#We are approved or approval is disabled

1361

1810

break

1362

elif client._approved is None:

1811

elif client.approved is None:

1363

1812

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

1364

1813

client.name)

1365

1814

if self.server.use_dbus:

1366

1815

# Emit D-Bus signal

1367

1816

client.NeedApproval(

1368

client.approval_delay_milliseconds(),

1369

client.approved_by_default)

1817

client.approval_delay.total_seconds()

1818

* 1000, client.approved_by_default)

1370

1819

else:

1371

1820

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

1372

1821

client.name)

1376

1825

return

1377

1826

1378

1827

#wait until timeout or approved

1379

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

1380

1828

time = datetime.datetime.now()

1381

1829

client.changedstate.acquire()

1382

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

1830

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

1383

1831

client.changedstate.release()

1384

1832

time2 = datetime.datetime.now()

1385

1833

if (time2 - time) >= delay:

1401

1849

try:

1402

1850

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

1403

1851

except gnutls.errors.GNUTLSError as error:

1404

logger.warning("gnutls send failed")

1852

logger.warning("gnutls send failed",

1853

exc_info=error)

1405

1854

return

1406

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

1407

sent, len(client.secret)

1408

- (sent_size + sent))

1855

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

1856

len(client.secret) - (sent_size

1857

+ sent))

1409

1858

sent_size += sent

1410

1859

1411

1860

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

1412

# bump the timeout as if seen

1413

client.checked_ok(client.extended_timeout)

1861

# bump the timeout using extended_timeout

1862

client.bump_timeout(client.extended_timeout)

1414

1863

if self.server.use_dbus:

1415

1864

# Emit D-Bus signal

1416

1865

client.GotSecret()

1421

1870

try:

1422

1871

session.bye()

1423

1872

except gnutls.errors.GNUTLSError as error:

1424

logger.warning("GnuTLS bye failed")

1873

logger.warning("GnuTLS bye failed",

1874

exc_info=error)

1425

1875

1426

1876

@staticmethod

1427

1877

def peer_certificate(session):

1428

1878

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

1429

1879

# If not an OpenPGP certificate...

1430

if (gnutls.library.functions

1431

.gnutls_certificate_type_get(session._c_object)

1880

if (gnutls.library.functions.gnutls_certificate_type_get(

1881

session._c_object)

1432

1882

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1433

1883

# ...do the normal thing

1434

1884

return session.peer_certificate

1448

1898

def fingerprint(openpgp):

1449

1899

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1450

1900

# New GnuTLS "datum" with the OpenPGP public key

1451

datum = (gnutls.library.types

1452

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

1453

ctypes.POINTER

1454

(ctypes.c_ubyte)),

1455

ctypes.c_uint(len(openpgp))))

1901

datum = gnutls.library.types.gnutls_datum_t(

1902

ctypes.cast(ctypes.c_char_p(openpgp),

1903

ctypes.POINTER(ctypes.c_ubyte)),

1904

ctypes.c_uint(len(openpgp)))

1456

1905

# New empty GnuTLS certificate

1457

1906

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1458

(gnutls.library.functions

1459

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1907

gnutls.library.functions.gnutls_openpgp_crt_init(

1908

ctypes.byref(crt))

1460

1909

# Import the OpenPGP public key into the certificate

1461

(gnutls.library.functions

1462

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

1463

gnutls.library.constants

1464

.GNUTLS_OPENPGP_FMT_RAW))

1910

gnutls.library.functions.gnutls_openpgp_crt_import(

1911

crt, ctypes.byref(datum),

1912

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1465

1913

# Verify the self signature in the key

1466

1914

crtverify = ctypes.c_uint()

1467

(gnutls.library.functions

1468

.gnutls_openpgp_crt_verify_self(crt, 0,

1469

ctypes.byref(crtverify)))

1915

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1916

crt, 0, ctypes.byref(crtverify))

1470

1917

if crtverify.value != 0:

1471

1918

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1472

raise (gnutls.errors.CertificateSecurityError

1473

("Verify failed"))

1919

raise gnutls.errors.CertificateSecurityError(

1920

"Verify failed")

1474

1921

# New buffer for the fingerprint

1475

1922

buf = ctypes.create_string_buffer(20)

1476

1923

buf_len = ctypes.c_size_t()

1477

1924

# Get the fingerprint from the certificate into the buffer

1478

(gnutls.library.functions

1479

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

1480

ctypes.byref(buf_len)))

1925

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1926

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

1481

1927

# Deinit the certificate

1482

1928

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1483

1929

# Convert the buffer to a Python bytestring

1484

1930

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

1485

1931

# Convert the bytestring to hexadecimal notation

1486

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

1932

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

1487

1933

return hex_fpr

1488

1934

1489

1935

1490

1936

class MultiprocessingMixIn(object):

1491

1937

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

1938

1492

1939

def sub_process_main(self, request, address):

1493

1940

try:

1494

1941

self.finish_request(request, address)

1495

except:

1942

except Exception:

1496

1943

self.handle_error(request, address)

1497

1944

self.close_request(request)

1498

1945

1499

1946

def process_request(self, request, address):

1500

1947

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

1501

multiprocessing.Process(target = self.sub_process_main,

1502

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

1948

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

1949

args = (request, address))

1950

proc.start()

1951

return proc

1503

1952

1504

1953

1505

1954

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1506

1955

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

1956

1507

1957

def process_request(self, request, client_address):

1508

1958

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

1509

1959

1511

1961

"""

1512

1962

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1513

1963

1514

super(MultiprocessingMixInWithPipe,

1515

self).process_request(request, client_address)

1964

proc = MultiprocessingMixIn.process_request(self, request,

1965

client_address)

1516

1966

self.child_pipe.close()

1517

self.add_pipe(parent_pipe)

1967

self.add_pipe(parent_pipe, proc)

1518

1968

1519

def add_pipe(self, parent_pipe):

1969

def add_pipe(self, parent_pipe, proc):

1520

1970

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

1521

raise NotImplementedError

1971

raise NotImplementedError()

1522

1972

1523

1973

1524

1974

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1530

1980

interface: None or a network interface name (string)

1531

1981

use_ipv6: Boolean; to use IPv6 or not

1532

1982

"""

1983

1533

1984

def __init__(self, server_address, RequestHandlerClass,

1534

interface=None, use_ipv6=True):

1985

interface=None,

1986

use_ipv6=True,

1987

socketfd=None):

1988

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

1989

creating a new one with socket.socket().

1990

"""

1535

1991

self.interface = interface

1536

1992

if use_ipv6:

1537

1993

self.address_family = socket.AF_INET6

1994

if socketfd is not None:

1995

# Save the file descriptor

1996

self.socketfd = socketfd

1997

# Save the original socket.socket() function

1998

self.socket_socket = socket.socket

1999

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

2000

#

2001

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

2002

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

2003

# patching socket.socket.)

2004

#

2005

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

2006

@functools.wraps(socket.socket)

2007

def socket_wrapper(*args, **kwargs):

2008

# Restore original function so subsequent calls are

2009

# not affected.

2010

socket.socket = self.socket_socket

2011

del self.socket_socket

2012

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

2013

# saved file descriptor.

2014

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

2015

# Replace socket.socket() function with wrapper

2016

socket.socket = socket_wrapper

2017

# The socketserver.TCPServer.__init__ will call

2018

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

2019

# socket_wrapper(), if socketfd was set.

1538

2020

socketserver.TCPServer.__init__(self, server_address,

1539

2021

RequestHandlerClass)

2022

1540

2023

def server_bind(self):

1541

2024

"""This overrides the normal server_bind() function

1542

2025

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

1548

2031

self.interface)

1549

2032

else:

1550

2033

try:

1551

self.socket.setsockopt(socket.SOL_SOCKET,

1552

SO_BINDTODEVICE,

1553

str(self.interface

1554

+ '\0'))

2034

self.socket.setsockopt(

2035

socket.SOL_SOCKET, SO_BINDTODEVICE,

2036

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

1555

2037

except socket.error as error:

1556

if error[0] == errno.EPERM:

1557

logger.error("No permission to"

1558

" bind to interface %s",

1559

self.interface)

1560

elif error[0] == errno.ENOPROTOOPT:

2038

if error.errno == errno.EPERM:

2039

logger.error("No permission to bind to"

2040

" interface %s", self.interface)

2041

elif error.errno == errno.ENOPROTOOPT:

1561

2042

logger.error("SO_BINDTODEVICE not available;"

1562

2043

" cannot bind to interface %s",

1563

2044

self.interface)

2045

elif error.errno == errno.ENODEV:

2046

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

2047

" cannot bind", self.interface)

1564

2048

else:

1565

2049

raise

1566

2050

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

1569

2053

if self.address_family == socket.AF_INET6:

1570

2054

any_address = "::" # in6addr_any

1571

2055

else:

1572

any_address = socket.INADDR_ANY

2056

any_address = "0.0.0.0" # INADDR_ANY

1573

2057

self.server_address = (any_address,

1574

2058

self.server_address[1])

1575

2059

elif not self.server_address[1]:

1576

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

1577

0)

2060

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

1578

2061

# if self.interface:

1579

2062

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

1580

2063

# 0, # port

1594

2077

1595

2078

Assumes a gobject.MainLoop event loop.

1596

2079

"""

2080

1597

2081

def __init__(self, server_address, RequestHandlerClass,

1598

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

1599

gnutls_priority=None, use_dbus=True):

2082

interface=None,

2083

use_ipv6=True,

2084

clients=None,

2085

gnutls_priority=None,

2086

use_dbus=True,

2087

socketfd=None):

1600

2088

self.enabled = False

1601

2089

self.clients = clients

1602

2090

if self.clients is None:

1603

self.clients = set()

2091

self.clients = {}

1604

2092

self.use_dbus = use_dbus

1605

2093

self.gnutls_priority = gnutls_priority

1606

2094

IPv6_TCPServer.__init__(self, server_address,

1607

2095

RequestHandlerClass,

1608

2096

interface = interface,

1609

use_ipv6 = use_ipv6)

2097

use_ipv6 = use_ipv6,

2098

socketfd = socketfd)

2099

1610

2100

def server_activate(self):

1611

2101

if self.enabled:

1612

2102

return socketserver.TCPServer.server_activate(self)

2103

1613

2104

def enable(self):

1614

2105

self.enabled = True

1615

def add_pipe(self, parent_pipe):

2106

2107

def add_pipe(self, parent_pipe, proc):

1616

2108

# Call "handle_ipc" for both data and EOF events

1617

gobject.io_add_watch(parent_pipe.fileno(),

1618

gobject.IO_IN | gobject.IO_HUP,

1619

functools.partial(self.handle_ipc,

1620

parent_pipe = parent_pipe))

1621

1622

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

2109

gobject.io_add_watch(

2110

parent_pipe.fileno(),

2111

gobject.IO_IN | gobject.IO_HUP,

2112

functools.partial(self.handle_ipc,

2113

parent_pipe = parent_pipe,

2114

proc = proc))

2115

2116

def handle_ipc(self, source, condition,

2117

parent_pipe=None,

2118

proc = None,

1623

2119

client_object=None):

1624

condition_names = {

1625

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

1626

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

1627

# blocking).

1628

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

1629

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

1630

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

1631

# broken, usually for pipes and

1632

# sockets).

1633

}

1634

conditions_string = ' | '.join(name

1635

for cond, name in

1636

condition_names.iteritems()

1637

if cond & condition)

1638

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

1639

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

2120

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

2121

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

2122

# Wait for other process to exit

2123

proc.join()

1640

2124

return False

1641

2125

1642

2126

# Read a request from the child

1647

2131

fpr = request[1]

1648

2132

address = request[2]

1649

2133

1650

for c in self.clients:

2134

for c in self.clients.itervalues():

1651

2135

if c.fingerprint == fpr:

1652

2136

client = c

1653

2137

break

1656

2140

"dress: %s", fpr, address)

1657

2141

if self.use_dbus:

1658

2142

# Emit D-Bus signal

1659

mandos_dbus_service.ClientNotFound(fpr, address[0])

2143

mandos_dbus_service.ClientNotFound(fpr,

2144

address[0])

1660

2145

parent_pipe.send(False)

1661

2146

return False

1662

2147

1663

gobject.io_add_watch(parent_pipe.fileno(),

1664

gobject.IO_IN | gobject.IO_HUP,

1665

functools.partial(self.handle_ipc,

1666

parent_pipe = parent_pipe,

1667

client_object = client))

2148

gobject.io_add_watch(

2149

parent_pipe.fileno(),

2150

gobject.IO_IN | gobject.IO_HUP,

2151

functools.partial(self.handle_ipc,

2152

parent_pipe = parent_pipe,

2153

proc = proc,

2154

client_object = client))

1668

2155

parent_pipe.send(True)

1669

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

2156

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

2157

# same fileno

1670

2158

return False

1671

2159

if command == 'funcall':

1672

2160

funcname = request[1]

1673

2161

args = request[2]

1674

2162

kwargs = request[3]

1675

2163

1676

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

2164

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

2165

funcname)(*args,

2166

**kwargs)))

1677

2167

1678

2168

if command == 'getattr':

1679

2169

attrname = request[1]

1680

if callable(client_object.__getattribute__(attrname)):

1681

parent_pipe.send(('function',))

2170

if isinstance(client_object.__getattribute__(attrname),

2171

collections.Callable):

2172

parent_pipe.send(('function', ))

1682

2173

else:

1683

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

2174

parent_pipe.send((

2175

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

1684

2176

1685

2177

if command == 'setattr':

1686

2178

attrname = request[1]

1690

2182

return True

1691

2183

1692

2184

2185

def rfc3339_duration_to_delta(duration):

2186

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

2187

2188

>>> rfc3339_duration_to_delta("P7D")

2189

datetime.timedelta(7)

2190

>>> rfc3339_duration_to_delta("PT60S")

2191

datetime.timedelta(0, 60)

2192

>>> rfc3339_duration_to_delta("PT60M")

2193

datetime.timedelta(0, 3600)

2194

>>> rfc3339_duration_to_delta("PT24H")

2195

datetime.timedelta(1)

2196

>>> rfc3339_duration_to_delta("P1W")

2197

datetime.timedelta(7)

2198

>>> rfc3339_duration_to_delta("PT5M30S")

2199

datetime.timedelta(0, 330)

2200

>>> rfc3339_duration_to_delta("P1DT3M20S")

2201

datetime.timedelta(1, 200)

2202

"""

2203

2204

# Parsing an RFC 3339 duration with regular expressions is not

2205

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

2206

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

2207

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

2208

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

2209

# avoid excessive use of external libraries.

2210

2211

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

2212

Token = collections.namedtuple("Token", (

2213

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

2214

# a "group" containing digits

2215

"value", # datetime.timedelta or None

2216

"followers")) # Tokens valid after this token

2217

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

2218

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

2219

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

2220

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

2221

datetime.timedelta(seconds=1),

2222

frozenset((token_end, )))

2223

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

2224

datetime.timedelta(minutes=1),

2225

frozenset((token_second, token_end)))

2226

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

2227

datetime.timedelta(hours=1),

2228

frozenset((token_minute, token_end)))

2229

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

2230

None,

2231

frozenset((token_hour, token_minute,

2232

token_second)))

2233

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

2234

datetime.timedelta(days=1),

2235

frozenset((token_time, token_end)))

2236

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

2237

datetime.timedelta(weeks=4),

2238

frozenset((token_day, token_end)))

2239

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

2240

datetime.timedelta(weeks=52),

2241

frozenset((token_month, token_end)))

2242

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

2243

datetime.timedelta(weeks=1),

2244

frozenset((token_end, )))

2245

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

2246

frozenset((token_year, token_month,

2247

token_day, token_time,

2248

token_week)))

2249

# Define starting values

2250

value = datetime.timedelta() # Value so far

2251

found_token = None

2252

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

2253

s = duration # String left to parse

2254

# Loop until end token is found

2255

while found_token is not token_end:

2256

# Search for any currently valid tokens

2257

for token in followers:

2258

match = token.regexp.match(s)

2259

if match is not None:

2260

# Token found

2261

if token.value is not None:

2262

# Value found, parse digits

2263

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

2264

# Add to value so far

2265

value += factor * token.value

2266

# Strip token from string

2267

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

2268

# Go to found token

2269

found_token = token

2270

# Set valid next tokens

2271

followers = found_token.followers

2272

break

2273

else:

2274

# No currently valid tokens were found

2275

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

2276

.format(duration))

2277

# End token found

2278

return value

2279

2280

1693

2281

def string_to_delta(interval):

1694

2282

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

1695

2283

1706

2294

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

1707

2295

datetime.timedelta(0, 330)

1708

2296

"""

2297

2298

try:

2299

return rfc3339_duration_to_delta(interval)

2300

except ValueError:

2301

pass

2302

1709

2303

timevalue = datetime.timedelta(0)

1710

2304

for s in interval.split():

1711

2305

try:

1712

suffix = unicode(s[-1])

2306

suffix = s[-1]

1713

2307

value = int(s[:-1])

1714

2308

if suffix == "d":

1715

2309

delta = datetime.timedelta(value)

1722

2316

elif suffix == "w":

1723

2317

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

1724

2318

else:

1725

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

1726

except (ValueError, IndexError) as e:

2319

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

2320

except IndexError as e:

1727

2321

raise ValueError(*(e.args))

1728

2322

timevalue += delta

1729

2323

return timevalue

1730

2324

1731

2325

1732

def if_nametoindex(interface):

1733

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

1734

1735

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

1736

global if_nametoindex

1737

try:

1738

if_nametoindex = (ctypes.cdll.LoadLibrary

1739

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

1740

.if_nametoindex)

1741

except (OSError, AttributeError):

1742

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

1743

def if_nametoindex(interface):

1744

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

1745

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

1746

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

1747

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1748

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

1749

interface))

1750

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

1751

ifreq[16:20])[0]

1752

return interface_index

1753

return if_nametoindex(interface)

1754

1755

1756

2326

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

1757

2327

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

1758

2328

1766

2336

sys.exit()

1767

2337

if not noclose:

1768

2338

# Close all standard open file descriptors

1769

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

2339

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

1770

2340

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

1771

2341

raise OSError(errno.ENODEV,

1772

"%s not a character device"

1773

% os.path.devnull)

2342

"{} not a character device"

2343

.format(os.devnull))

1774

2344

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

1775

2345

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

1776

2346

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

1785

2355

1786

2356

parser = argparse.ArgumentParser()

1787

2357

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

1788

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

2358

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

1789

2359

help="show version number and exit")

1790

2360

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

1791

2361

help="Bind to interface IF")

1797

2367

help="Run self-test")

1798

2368

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

1799

2369

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

1800

" to terminal")

2370

" to terminal", default=None)

1801

2371

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

1802

2372

help="Debug level for stdout output")

1803

2373

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

1810

2380

" files")

1811

2381

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

1812

2382

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

1813

" system bus interface")

2383

" system bus interface", default=None)

1814

2384

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

1815

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

2385

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

2386

default=None)

2387

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

2388

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

2389

" state", default=None)

2390

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

2391

help="Specify a file descriptor to a network"

2392

" socket to use instead of creating one")

2393

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

2394

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

2395

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

2396

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

2397

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

2398

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

2399

default=None)

2400

1816

2401

options = parser.parse_args()

1817

2402

1818

2403

if options.check:

1819

2404

import doctest

1820

doctest.testmod()

1821

sys.exit()

2405

fail_count, test_count = doctest.testmod()

2406

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

1822

2407

1823

2408

# Default values for config file for server-global settings

1824

2409

server_defaults = { "interface": "",

1826

2411

"port": "",

1827

2412

"debug": "False",

1828

2413

"priority":

1829

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

2414

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

2415

":+SIGN-DSA-SHA256",

1830

2416

"servicename": "Mandos",

1831

2417

"use_dbus": "True",

1832

2418

"use_ipv6": "True",

1833

2419

"debuglevel": "",

1834

}

2420

"restore": "True",

2421

"socket": "",

2422

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

2423

"foreground": "False",

2424

"zeroconf": "True",

2425

}

1835

2426

1836

2427

# Parse config file for server-global settings

1837

2428

server_config = configparser.SafeConfigParser(server_defaults)

1838

2429

del server_defaults

1839

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

1840

"mandos.conf"))

2430

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

1841

2431

# Convert the SafeConfigParser object to a dict

1842

2432

server_settings = server_config.defaults()

1843

2433

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

1844

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

2434

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

1845

2435

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

1846

2436

option)

1847

2437

if server_settings["port"]:

1848

2438

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

1849

2439

"port")

2440

if server_settings["socket"]:

2441

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

2442

"socket")

2443

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

2444

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

2445

# happen with a supplied network socket.

2446

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

2447

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

2448

["socket"])

1850

2449

del server_config

1851

2450

1852

2451

# Override the settings from the config file with command line

1853

2452

# options, if set.

1854

2453

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

1855

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

1856

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

2454

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

2455

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

2456

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

1857

2457

value = getattr(options, option)

1858

2458

if value is not None:

1859

2459

server_settings[option] = value

1860

2460

del options

1861

2461

# Force all strings to be unicode

1862

2462

for option in server_settings.keys():

1863

if type(server_settings[option]) is str:

1864

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

2463

if isinstance(server_settings[option], bytes):

2464

server_settings[option] = (server_settings[option]

2465

.decode("utf-8"))

2466

# Force all boolean options to be boolean

2467

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

2468

"foreground", "zeroconf"):

2469

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

2470

# Debug implies foreground

2471

if server_settings["debug"]:

2472

server_settings["foreground"] = True

1865

2473

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

1866

2474

1867

2475

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

1868

2476

2477

if (not server_settings["zeroconf"]

2478

and not (server_settings["port"]

2479

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

2480

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

2481

1869

2482

# For convenience

1870

2483

debug = server_settings["debug"]

1871

2484

debuglevel = server_settings["debuglevel"]

1872

2485

use_dbus = server_settings["use_dbus"]

1873

2486

use_ipv6 = server_settings["use_ipv6"]

2487

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

2488

stored_state_file)

2489

foreground = server_settings["foreground"]

2490

zeroconf = server_settings["zeroconf"]

2491

2492

if debug:

2493

initlogger(debug, logging.DEBUG)

2494

else:

2495

if not debuglevel:

2496

initlogger(debug)

2497

else:

2498

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

2499

initlogger(debug, level)

1874

2500

1875

2501

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

1876

syslogger.setFormatter(logging.Formatter

1877

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

1878

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

1879

% server_settings["servicename"]))

2502

syslogger.setFormatter(

2503

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

2504

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

2505

server_settings["servicename"])))

1880

2506

1881

2507

# Parse config file with clients

1882

client_defaults = { "timeout": "5m",

1883

"extended_timeout": "15m",

1884

"interval": "2m",

1885

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

1886

"host": "",

1887

"approval_delay": "0s",

1888

"approval_duration": "1s",

1889

}

1890

client_config = configparser.SafeConfigParser(client_defaults)

2508

client_config = configparser.SafeConfigParser(Client

2509

.client_defaults)

1891

2510

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

1892

2511

"clients.conf"))

1893

2512

1894

2513

global mandos_dbus_service

1895

2514

mandos_dbus_service = None

1896

2515

1897

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

1898

server_settings["port"]),

1899

ClientHandler,

1900

interface=(server_settings["interface"]

1901

or None),

1902

use_ipv6=use_ipv6,

1903

gnutls_priority=

1904

server_settings["priority"],

1905

use_dbus=use_dbus)

1906

if not debug:

1907

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

2516

socketfd = None

2517

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

2518

socketfd = server_settings["socket"]

2519

tcp_server = MandosServer(

2520

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

2521

ClientHandler,

2522

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

2523

use_ipv6=use_ipv6,

2524

gnutls_priority=server_settings["priority"],

2525

use_dbus=use_dbus,

2526

socketfd=socketfd)

2527

if not foreground:

2528

pidfilename = "/run/mandos.pid"

2529

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

2530

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

2531

pidfile = None

1908

2532

try:

1909

pidfile = open(pidfilename, "w")

1910

except IOError:

1911

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

2533

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

2534

except IOError as e:

2535

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

2536

exc_info=e)

1912

2537

1913

try:

1914

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

1915

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

1916

except KeyError:

2538

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

1917

2539

try:

1918

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

1919

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

2540

uid = pwd.getpwnam(name).pw_uid

2541

gid = pwd.getpwnam(name).pw_gid

2542

break

1920

2543

except KeyError:

1921

try:

1922

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

1923

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

1924

except KeyError:

1925

uid = 65534

1926

gid = 65534

2544

continue

2545

else:

2546

uid = 65534

2547

gid = 65534

1927

2548

try:

1928

2549

os.setgid(gid)

1929

2550

os.setuid(uid)

1930

2551

except OSError as error:

1931

if error[0] != errno.EPERM:

1932

raise error

1933

1934

if not debug and not debuglevel:

1935

syslogger.setLevel(logging.WARNING)

1936

console.setLevel(logging.WARNING)

1937

if debuglevel:

1938

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

1939

syslogger.setLevel(level)

1940

console.setLevel(level)

2552

if error.errno != errno.EPERM:

2553

raise

1941

2554

1942

2555

if debug:

1943

2556

# Enable all possible GnuTLS debugging

1950

2563

def debug_gnutls(level, string):

1951

2564

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

1952

2565

1953

(gnutls.library.functions

1954

.gnutls_global_set_log_function(debug_gnutls))

2566

gnutls.library.functions.gnutls_global_set_log_function(

2567

debug_gnutls)

1955

2568

1956

2569

# Redirect stdin so all checkers get /dev/null

1957

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

2570

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

1958

2571

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

1959

2572

if null > 2:

1960

2573

os.close(null)

1961

else:

1962

# No console logging

1963

logger.removeHandler(console)

1964

2574

1965

2575

# Need to fork before connecting to D-Bus

1966

if not debug:

2576

if not foreground:

1967

2577

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

1968

2578

daemon()

1969

2579

2580

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

2581

# need to inform gobject that threads will be used.

2582

gobject.threads_init()

2583

1970

2584

global main_loop

1971

2585

# From the Avahi example code

1972

DBusGMainLoop(set_as_default=True )

2586

DBusGMainLoop(set_as_default=True)

1973

2587

main_loop = gobject.MainLoop()

1974

2588

bus = dbus.SystemBus()

1975

2589

# End of Avahi example code

1976

2590

if use_dbus:

1977

2591

try:

1978

2592

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

1979

bus, do_not_queue=True)

1980

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

1981

bus, do_not_queue=True)

1982

except dbus.exceptions.NameExistsException as e:

1983

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

2593

bus,

2594

do_not_queue=True)

2595

old_bus_name = dbus.service.BusName(

2596

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

2597

do_not_queue=True)

2598

except dbus.exceptions.DBusException as e:

2599

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

1984

2600

use_dbus = False

1985

2601

server_settings["use_dbus"] = False

1986

2602

tcp_server.use_dbus = False

1987

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1988

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

1989

servicetype = "_mandos._tcp",

1990

protocol = protocol, bus = bus)

1991

if server_settings["interface"]:

1992

service.interface = (if_nametoindex

1993

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

2603

if zeroconf:

2604

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2605

service = AvahiServiceToSyslog(

2606

name = server_settings["servicename"],

2607

servicetype = "_mandos._tcp",

2608

protocol = protocol,

2609

bus = bus)

2610

if server_settings["interface"]:

2611

service.interface = if_nametoindex(

2612

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

1994

2613

1995

2614

global multiprocessing_manager

1996

2615

multiprocessing_manager = multiprocessing.Manager()

1997

2616

1998

2617

client_class = Client

1999

2618

if use_dbus:

2000

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

2001

def client_config_items(config, section):

2002

special_settings = {

2003

"approved_by_default":

2004

lambda: config.getboolean(section,

2005

"approved_by_default"),

2006

}

2007

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

2619

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

2620

2621

client_settings = Client.config_parser(client_config)

2622

old_client_settings = {}

2623

clients_data = {}

2624

2625

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

2626

global wnull

2627

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

2628

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

2629

# mode

2630

if debug or not foreground:

2631

wnull.close()

2632

2633

# Get client data and settings from last running state.

2634

if server_settings["restore"]:

2635

try:

2636

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

2637

clients_data, old_client_settings = pickle.load(

2638

stored_state)

2639

os.remove(stored_state_path)

2640

except IOError as e:

2641

if e.errno == errno.ENOENT:

2642

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

2643

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

2644

else:

2645

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

2646

exc_info=e)

2647

raise

2648

except EOFError as e:

2649

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

2650

"EOFError:",

2651

exc_info=e)

2652

2653

with PGPEngine() as pgp:

2654

for client_name, client in clients_data.items():

2655

# Skip removed clients

2656

if client_name not in client_settings:

2657

continue

2658

2659

# Decide which value to use after restoring saved state.

2660

# We have three different values: Old config file,

2661

# new config file, and saved state.

2662

# New config value takes precedence if it differs from old

2663

# config value, otherwise use saved state.

2664

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

2665

try:

2666

# For each value in new config, check if it

2667

# differs from the old config value (Except for

2668

# the "secret" attribute)

2669

if (name != "secret"

2670

and (value !=

2671

old_client_settings[client_name][name])):

2672

client[name] = value

2673

except KeyError:

2674

pass

2675

2676

# Clients who has passed its expire date can still be

2677

# enabled if its last checker was successful. A Client

2678

# whose checker succeeded before we stored its state is

2679

# assumed to have successfully run all checkers during

2680

# downtime.

2681

if client["enabled"]:

2682

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

2683

if not client["last_checked_ok"]:

2684

logger.warning(

2685

"disabling client {} - Client never "

2686

"performed a successful checker".format(

2687

client_name))

2688

client["enabled"] = False

2689

elif client["last_checker_status"] != 0:

2690

logger.warning(

2691

"disabling client {} - Client last"

2692

" checker failed with error code"

2693

" {}".format(

2694

client_name,

2695

client["last_checker_status"]))

2696

client["enabled"] = False

2697

else:

2698

client["expires"] = (

2699

datetime.datetime.utcnow()

2700

+ client["timeout"])

2701

logger.debug("Last checker succeeded,"

2702

" keeping {} enabled".format(

2703

client_name))

2008

2704

try:

2009

yield (name, special_settings[name]())

2010

except KeyError:

2011

yield (name, value)

2012

2013

tcp_server.clients.update(set(

2014

client_class(name = section,

2015

config= dict(client_config_items(

2016

client_config, section)))

2017

for section in client_config.sections()))

2705

client["secret"] = pgp.decrypt(

2706

client["encrypted_secret"],

2707

client_settings[client_name]["secret"])

2708

except PGPError:

2709

# If decryption fails, we use secret from new settings

2710

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

2711

client_name))

2712

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

2713

["secret"])

2714

2715

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

2716

for client_name in (set(old_client_settings)

2717

- set(client_settings)):

2718

del clients_data[client_name]

2719

for client_name in (set(client_settings)

2720

- set(old_client_settings)):

2721

clients_data[client_name] = client_settings[client_name]

2722

2723

# Create all client objects

2724

for client_name, client in clients_data.items():

2725

tcp_server.clients[client_name] = client_class(

2726

name = client_name,

2727

settings = client,

2728

server_settings = server_settings)

2729

2018

2730

if not tcp_server.clients:

2019

2731

logger.warning("No clients defined")

2020

2021

if not debug:

2022

try:

2023

with pidfile:

2024

pid = os.getpid()

2025

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

2026

del pidfile

2027

except IOError:

2028

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

2029

pidfilename, pid)

2030

except NameError:

2031

# "pidfile" was never created

2032

pass

2732

2733

if not foreground:

2734

if pidfile is not None:

2735

pid = os.getpid()

2736

try:

2737

with pidfile:

2738

print(pid, file=pidfile)

2739

except IOError:

2740

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

2741

pidfilename, pid)

2742

del pidfile

2033

2743

del pidfilename

2034

2035

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

2036

2744

2037

2745

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

2038

2746

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

2039

2747

2040

2748

if use_dbus:

2041

class MandosDBusService(dbus.service.Object):

2749

2750

@alternate_dbus_interfaces(

2751

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

2752

class MandosDBusService(DBusObjectWithProperties):

2042

2753

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

2754

2043

2755

def __init__(self):

2044

2756

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

2757

2045

2758

_interface = "se.recompile.Mandos"

2046

2759

2760

@dbus_interface_annotations(_interface)

2761

def _foo(self):

2762

return {

2763

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

2764

"false" }

2765

2047

2766

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

2048

2767

def ClientAdded(self, objpath):

2049

2768

"D-Bus signal"

2062

2781

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

2063

2782

def GetAllClients(self):

2064

2783

"D-Bus method"

2065

return dbus.Array(c.dbus_object_path

2066

for c in tcp_server.clients)

2784

return dbus.Array(c.dbus_object_path for c in

2785

tcp_server.clients.itervalues())

2067

2786

2068

2787

@dbus.service.method(_interface,

2069

2788

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

2070

2789

def GetAllClientsWithProperties(self):

2071

2790

"D-Bus method"

2072

2791

return dbus.Dictionary(

2073

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

2074

for c in tcp_server.clients),

2792

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

2793

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

2075

2794

signature="oa{sv}")

2076

2795

2077

2796

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

2078

2797

def RemoveClient(self, object_path):

2079

2798

"D-Bus method"

2080

for c in tcp_server.clients:

2799

for c in tcp_server.clients.itervalues():

2081

2800

if c.dbus_object_path == object_path:

2082

tcp_server.clients.remove(c)

2801

del tcp_server.clients[c.name]

2083

2802

c.remove_from_connection()

2084

2803

# Don't signal anything except ClientRemoved

2085

2804

c.disable(quiet=True)

2090

2809

2091

2810

del _interface

2092

2811

2093

class MandosDBusServiceTransitional(MandosDBusService):

2094

__metaclass__ = AlternateDBusNamesMetaclass

2095

mandos_dbus_service = MandosDBusServiceTransitional()

2812

mandos_dbus_service = MandosDBusService()

2096

2813

2097

2814

def cleanup():

2098

2815

"Cleanup function; run on exit"

2099

service.cleanup()

2100

2816

if zeroconf:

2817

service.cleanup()

2818

2819

multiprocessing.active_children()

2820

wnull.close()

2821

if not (tcp_server.clients or client_settings):

2822

return

2823

2824

# Store client before exiting. Secrets are encrypted with key

2825

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

2826

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

2827

clients = {}

2828

with PGPEngine() as pgp:

2829

for client in tcp_server.clients.itervalues():

2830

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

2831

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

2832

key)

2833

client_dict = {}

2834

2835

# A list of attributes that can not be pickled

2836

# + secret.

2837

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

2838

"checker", "server_settings" }

2839

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

2840

.Object):

2841

exclude.add(name)

2842

2843

client_dict["encrypted_secret"] = (client

2844

.encrypted_secret)

2845

for attr in client.client_structure:

2846

if attr not in exclude:

2847

client_dict[attr] = getattr(client, attr)

2848

2849

clients[client.name] = client_dict

2850

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

2851

2852

try:

2853

with tempfile.NamedTemporaryFile(

2854

mode='wb',

2855

suffix=".pickle",

2856

prefix='clients-',

2857

dir=os.path.dirname(stored_state_path),

2858

delete=False) as stored_state:

2859

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

2860

tempname = stored_state.name

2861

os.rename(tempname, stored_state_path)

2862

except (IOError, OSError) as e:

2863

if not debug:

2864

try:

2865

os.remove(tempname)

2866

except NameError:

2867

pass

2868

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

2869

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

2870

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

2871

else:

2872

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

2873

exc_info=e)

2874

raise

2875

2876

# Delete all clients, and settings from config

2101

2877

while tcp_server.clients:

2102

client = tcp_server.clients.pop()

2878

name, client = tcp_server.clients.popitem()

2103

2879

if use_dbus:

2104

2880

client.remove_from_connection()

2105

client.disable_hook = None

2106

2881

# Don't signal anything except ClientRemoved

2107

2882

client.disable(quiet=True)

2108

2883

if use_dbus:

2109

2884

# Emit D-Bus signal

2110

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2111

client.name)

2885

mandos_dbus_service.ClientRemoved(

2886

client.dbus_object_path, client.name)

2887

client_settings.clear()

2112

2888

2113

2889

atexit.register(cleanup)

2114

2890

2115

for client in tcp_server.clients:

2891

for client in tcp_server.clients.itervalues():

2116

2892

if use_dbus:

2117

2893

# Emit D-Bus signal

2118

2894

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2119

client.enable()

2895

# Need to initiate checking of clients

2896

if client.enabled:

2897

client.init_checker()

2120

2898

2121

2899

tcp_server.enable()

2122

2900

tcp_server.server_activate()

2123

2901

2124

2902

# Find out what port we got

2125

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

2903

if zeroconf:

2904

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

2126

2905

if use_ipv6:

2127

2906

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

2128

" flowinfo %d, scope_id %d"

2129

% tcp_server.socket.getsockname())

2907

" flowinfo %d, scope_id %d",

2908

*tcp_server.socket.getsockname())

2130

2909

else: # IPv4

2131

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

2132

% tcp_server.socket.getsockname())

2910

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

2911

*tcp_server.socket.getsockname())

2133

2912

2134

2913

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

2135

2914

2136

2915

try:

2137

# From the Avahi example code

2138

try:

2139

service.activate()

2140

except dbus.exceptions.DBusException as error:

2141

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

2142

cleanup()

2143

sys.exit(1)

2144

# End of Avahi example code

2916

if zeroconf:

2917

# From the Avahi example code

2918

try:

2919

service.activate()

2920

except dbus.exceptions.DBusException as error:

2921

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

2922

cleanup()

2923

sys.exit(1)

2924

# End of Avahi example code

2145

2925

2146

2926

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

2147

2927

lambda *args, **kwargs:

2151

2931

logger.debug("Starting main loop")

2152

2932

main_loop.run()

2153

2933

except AvahiError as error:

2154

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

2934

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

2155

2935

cleanup()

2156

2936

sys.exit(1)

2157

2937

except KeyboardInterrupt: