/mandos/release : revision 237.7.317

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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 hashlib

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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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import ctypes.util

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import xml.dom.minidom

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import inspect

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import Crypto.Cipher.AES

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.4.1"

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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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stored_state_path = "/var/lib/mandos/clients.pickle"

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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('%(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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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

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.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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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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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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392

if error is None:

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395

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:

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if (error.get_dbus_name()

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

403

logger.info("Local Zeroconf service name"

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" collision.")

405

return self.rename(remove=False)

406

else:

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

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self.cleanup()

409

os._exit(1)

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410

else:

253

411

if error is None:

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

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413

else:

256

414

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

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def activate(self):

258

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

259

418

if self.server is None:

263

422

follow_name_owner_changes=True),

264

423

avahi.DBUS_INTERFACE_SERVER)

265

424

self.server.connect_to_signal("StateChanged",

266

self.server_state_changed)

425

self.server_state_changed)

267

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

268

427

428

269

429

class AvahiServiceToSyslog(AvahiService):

270

def rename(self):

430

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

271

431

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

272

ret = AvahiService.rename(self)

273

syslogger.setFormatter(logging.Formatter

274

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

275

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

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% self.name))

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

277

436

return ret

278

437

279

def _timedelta_to_milliseconds(td):

280

"Convert a datetime.timedelta() to milliseconds"

281

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

282

+ (td.seconds * 1000)

283

+ (td.microseconds // 1000))

284

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

285

448

class Client(object):

286

449

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

287

450

288

451

Attributes:

289

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

452

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

290

453

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

291

454

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

292

455

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

311

474

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

312

475

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

313

476

last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflect crashed

315

checker, or None.

316

last_enabled: datetime.datetime(); (UTC)

477

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

317

482

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

318

483

D-Bus identifiers

319

484

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

320

485

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

321

486

until this client is disabled

322

extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

323

488

runtime_expansions: Allowed attributes for runtime expansion.

324

489

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

325

490

disabled, or None

491

server_settings: The server_settings dict from main()

326

492

"""

327

493

328

494

runtime_expansions = ("approval_delay", "approval_duration",

329

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

330

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

495

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

496

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

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"last_approval_request", "last_checked_ok",

331

498

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

332

333

def timeout_milliseconds(self):

334

"Return the 'timeout' attribute in milliseconds"

335

return _timedelta_to_milliseconds(self.timeout)

336

337

def extended_timeout_milliseconds(self):

338

"Return the 'extended_timeout' attribute in milliseconds"

339

return _timedelta_to_milliseconds(self.extended_timeout)

340

341

def interval_milliseconds(self):

342

"Return the 'interval' attribute in milliseconds"

343

return _timedelta_to_milliseconds(self.interval)

344

345

def approval_delay_milliseconds(self):

346

return _timedelta_to_milliseconds(self.approval_delay)

347

348

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

349

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

350

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

351

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):

352

562

self.name = name

353

if config is None:

354

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

355

580

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

356

# Uppercase and remove spaces from fingerprint for later

357

# comparison purposes with return value from the fingerprint()

358

# function

359

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

360

.replace(" ", ""))

361

581

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

362

if "secret" in config:

363

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

364

elif "secfile" in config:

365

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

366

(config["secfile"])),

367

"rb") as secfile:

368

self.secret = secfile.read()

369

else:

370

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

371

% self.name)

372

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

373

self.created = datetime.datetime.utcnow()

374

self.enabled = True

375

self.last_approval_request = None

376

self.last_enabled = datetime.datetime.utcnow()

377

self.last_checked_ok = None

378

self.last_checker_status = None

379

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

380

self.extended_timeout = string_to_delta(config

381

["extended_timeout"])

382

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

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

383

586

self.checker = None

384

587

self.checker_initiator_tag = None

385

588

self.disable_initiator_tag = None

386

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

387

589

self.checker_callback_tag = None

388

self.checker_command = config["checker"]

389

590

self.current_checker_command = None

390

self._approved = None

391

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

392

True)

591

self.approved = None

393

592

self.approvals_pending = 0

394

self.approval_delay = string_to_delta(

395

config["approval_delay"])

396

self.approval_duration = string_to_delta(

397

config["approval_duration"])

398

self.changedstate = (multiprocessing_manager

399

.Condition(multiprocessing_manager

400

.Lock()))

401

self.client_structure = [attr for attr

402

in self.__dict__.iterkeys()

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

403

597

if not attr.startswith("_")]

404

598

self.client_structure.append("client_structure")

405

406

407

for name, t in inspect.getmembers(type(self),

408

lambda obj:

409

isinstance(obj,

410

property)):

599

600

for name, t in inspect.getmembers(

601

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

411

602

if not name.startswith("_"):

412

603

self.client_structure.append(name)

413

604

421

612

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

422

613

# Already enabled

423

614

return

424

self.send_changedstate()

425

615

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

426

616

self.enabled = True

427

617

self.last_enabled = datetime.datetime.utcnow()

428

618

self.init_checker()

619

self.send_changedstate()

429

620

430

621

def disable(self, quiet=True):

431

622

"""Disable this client."""

432

623

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

433

624

return False

434

625

if not quiet:

435

self.send_changedstate()

436

if not quiet:

437

626

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

438

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

627

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

439

628

gobject.source_remove(self.disable_initiator_tag)

440

629

self.disable_initiator_tag = None

441

630

self.expires = None

442

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

631

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

443

632

gobject.source_remove(self.checker_initiator_tag)

444

633

self.checker_initiator_tag = None

445

634

self.stop_checker()

446

635

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

447

638

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

448

639

return False

449

640

450

641

def __del__(self):

451

642

self.disable()

452

643

453

644

def init_checker(self):

454

645

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

455

646

# and every interval from then on.

456

self.checker_initiator_tag = (gobject.timeout_add

457

(self.interval_milliseconds(),

458

self.start_checker))

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)

459

652

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

460

self.disable_initiator_tag = (gobject.timeout_add

461

(self.timeout_milliseconds(),

462

self.disable))

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)

463

657

# Also start a new checker *right now*.

464

658

self.start_checker()

465

466

467

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

659

660

def checker_callback(self, source, condition, connection,

661

command):

468

662

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

469

663

self.checker_callback_tag = None

470

664

self.checker = None

471

if os.WIFEXITED(condition):

472

self.last_checker_status = os.WEXITSTATUS(condition)

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

473

672

if self.last_checker_status == 0:

474

673

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

475

674

vars(self))

476

675

self.checked_ok()

477

676

else:

478

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

479

vars(self))

677

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

480

678

else:

481

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

482

681

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

483

682

vars(self))

484

485

def checked_ok(self, timeout=None):

486

"""Bump up the timeout for this client.

487

488

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

489

alive and well.

490

"""

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."""

491

694

if timeout is None:

492

695

timeout = self.timeout

493

self.last_checked_ok = datetime.datetime.utcnow()

494

696

if self.disable_initiator_tag is not None:

495

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

496

699

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

497

self.disable_initiator_tag = (gobject.timeout_add

498

(_timedelta_to_milliseconds

499

(timeout), self.disable))

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

500

702

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

501

703

502

704

def need_approval(self):

508

710

If a checker already exists, leave it running and do

509

711

nothing."""

510

712

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

511

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

512

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

513

# client would inevitably timeout, since no checker would get

514

# 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

515

717

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

516

718

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

517

719

# should be.

518

720

519

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

520

try:

521

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

522

except (AttributeError, OSError) as error:

523

if (isinstance(error, OSError)

524

and error.errno != errno.ECHILD):

525

raise error

526

else:

527

if pid:

528

logger.warning("Checker was a zombie")

529

gobject.source_remove(self.checker_callback_tag)

530

self.checker_callback(pid, status,

531

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

532

725

# Start a new checker if needed

533

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 }

534

731

try:

535

# In case checker_command has exactly one % operator

536

command = self.checker_command % self.host

537

except TypeError:

538

# Escape attributes for the shell

539

escaped_attrs = dict(

540

(attr,

541

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

542

errors=

543

'replace')))

544

for attr in

545

self.runtime_expansions)

546

547

try:

548

command = self.checker_command % escaped_attrs

549

except TypeError as error:

550

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

551

' %s', self.checker_command, error)

552

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

553

738

self.current_checker_command = command

554

try:

555

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

556

command, self.name)

557

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

558

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

559

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

560

# always replaced by /dev/null.)

561

self.checker = subprocess.Popen(command,

562

close_fds=True,

563

shell=True, cwd="/")

564

self.checker_callback_tag = (gobject.child_watch_add

565

(self.checker.pid,

566

self.checker_callback,

567

data=command))

568

# The checker may have completed before the gobject

569

# watch was added. Check for this.

570

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

571

if pid:

572

gobject.source_remove(self.checker_callback_tag)

573

self.checker_callback(pid, status, command)

574

except OSError as error:

575

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

576

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)

577

764

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

578

765

return True

579

766

585

772

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

586

773

return

587

774

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

588

try:

589

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

590

#time.sleep(0.5)

591

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

592

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

593

except OSError as error:

594

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

595

raise

775

self.checker.terminate()

596

776

self.checker = None

597

777

598

# Encrypts a client secret and stores it in a varible

599

# encrypted_secret

600

def encrypt_secret(self, key):

601

# Encryption-key need to be of a specific size, so we hash

602

# supplied key

603

hasheng = hashlib.sha256()

604

hasheng.update(key)

605

encryptionkey = hasheng.digest()

606

607

# Create validation hash so we know at decryption if it was

608

# sucessful

609

hasheng = hashlib.sha256()

610

hasheng.update(self.secret)

611

validationhash = hasheng.digest()

612

613

# Encrypt secret

614

iv = os.urandom(Crypto.Cipher.AES.block_size)

615

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

616

Crypto.Cipher.AES.MODE_CFB, iv)

617

ciphertext = ciphereng.encrypt(validationhash+self.secret)

618

self.encrypted_secret = (ciphertext, iv)

619

620

# Decrypt a encrypted client secret

621

def decrypt_secret(self, key):

622

# Decryption-key need to be of a specific size, so we hash

623

# supplied key

624

hasheng = hashlib.sha256()

625

hasheng.update(key)

626

encryptionkey = hasheng.digest()

627

628

# Decrypt encrypted secret

629

ciphertext, iv = self.encrypted_secret

630

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

631

Crypto.Cipher.AES.MODE_CFB, iv)

632

plain = ciphereng.decrypt(ciphertext)

633

634

# Validate decrypted secret to know if it was succesful

635

hasheng = hashlib.sha256()

636

validationhash = plain[:hasheng.digest_size]

637

secret = plain[hasheng.digest_size:]

638

hasheng.update(secret)

639

640

# If validation fails, we use key as new secret. Otherwise, we

641

# use the decrypted secret

642

if hasheng.digest() == validationhash:

643

self.secret = secret

644

else:

645

self.secret = key

646

del self.encrypted_secret

647

648

649

def dbus_service_property(dbus_interface, signature="v",

650

access="readwrite", byte_arrays=False):

778

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

651

783

"""Decorators for marking methods of a DBusObjectWithProperties to

652

784

become properties on the D-Bus.

653

785

662

794

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

663

795

if byte_arrays and signature != "ay":

664

796

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

665

" signature %r" % signature)

797

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

798

666

799

def decorator(func):

667

800

func._dbus_is_property = True

668

801

func._dbus_interface = dbus_interface

673

806

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

674

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

675

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

676

851

return decorator

677

852

678

853

679

854

class DBusPropertyException(dbus.exceptions.DBusException):

680

855

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

681

856

"""

682

def __unicode__(self):

683

return unicode(str(self))

857

pass

684

858

685

859

686

860

class DBusPropertyAccessException(DBusPropertyException):

704

878

"""

705

879

706

880

@staticmethod

707

def _is_dbus_property(obj):

708

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)

709

889

710

def _get_all_dbus_properties(self):

890

def _get_all_dbus_things(self, thing):

711

891

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

712

892

"""

713

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

893

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

894

athing.__get__(self))

714

895

for cls in self.__class__.__mro__

715

for name, prop in

716

inspect.getmembers(cls, self._is_dbus_property))

896

for name, athing in

897

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

717

898

718

899

def _get_dbus_property(self, interface_name, property_name):

719

900

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

720

901

property with the specified name and interface.

721

902

"""

722

for cls in self.__class__.__mro__:

723

for name, value in (inspect.getmembers

724

(cls, self._is_dbus_property)):

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

725

906

if (value._dbus_name == property_name

726

907

and value._dbus_interface == interface_name):

727

908

return value.__get__(self)

728

909

729

910

# No such property

730

raise DBusPropertyNotFound(self.dbus_object_path + ":"

731

+ interface_name + "."

732

+ property_name)

911

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

912

self.dbus_object_path, interface_name, property_name))

733

913

734

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

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

735

916

out_signature="v")

736

917

def Get(self, interface_name, property_name):

737

918

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

755

936

# The byte_arrays option is not supported yet on

756

937

# signatures other than "ay".

757

938

if prop._dbus_signature != "ay":

758

raise ValueError

759

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

760

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))

761

944

prop(value)

762

945

763

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

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

764

948

out_signature="a{sv}")

765

949

def GetAll(self, interface_name):

766

950

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

768

952

769

953

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

770

954

"""

771

all = {}

772

for name, prop in self._get_all_dbus_properties():

955

properties = {}

956

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

773

957

if (interface_name

774

958

and interface_name != prop._dbus_interface):

775

959

# Interface non-empty but did not match

779

963

continue

780

964

value = prop()

781

965

if not hasattr(value, "variant_level"):

782

all[name] = value

966

properties[name] = value

783

967

continue

784

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

785

value.variant_level+1)

786

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

787

979

788

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

789

981

out_signature="s",

790

982

path_keyword='object_path',

791

983

connection_keyword='connection')

792

984

def Introspect(self, object_path, connection):

793

"""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.

794

988

"""

795

989

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

796

990

connection)

797

991

try:

798

992

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

993

799

994

def make_tag(document, name, prop):

800

995

e = document.createElement("property")

801

996

e.setAttribute("name", name)

802

997

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

803

998

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

804

999

return e

1000

805

1001

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

1002

# Add property tags

806

1003

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

807

1004

for name, prop

808

in self._get_all_dbus_properties()

1005

in self._get_all_dbus_things("property")

809

1006

if prop._dbus_interface

810

1007

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

811

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)

812

1038

# Add the names to the return values for the

813

1039

# "org.freedesktop.DBus.Properties" methods

814

1040

if (if_tag.getAttribute("name")

829

1055

except (AttributeError, xml.dom.DOMException,

830

1056

xml.parsers.expat.ExpatError) as error:

831

1057

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

832

error)

1058

exc_info=error)

833

1059

return xmlstring

834

1060

835

1061

836

def datetime_to_dbus (dt, variant_level=0):

1062

def datetime_to_dbus(dt, variant_level=0):

837

1063

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

838

1064

if dt is None:

839

1065

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

840

return dbus.String(dt.isoformat(),

841

variant_level=variant_level)

842

843

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

844

.__metaclass__):

845

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

846

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).

847

1091

"""

848

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

849

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

850

# methods, signals, or properties in them

851

for base in (b for b in bases

852

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

853

# Go though all attributes of the base class

854

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):

855

1100

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

856

1101

# with the wrong interface name

857

1102

if (not hasattr(attribute, "_dbus_interface")

858

or not attribute._dbus_interface

859

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

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

860

1105

continue

861

1106

# Create an alternate D-Bus interface name based on

862

1107

# the current name

863

alt_interface = (attribute._dbus_interface

864

.replace("se.recompile.Mandos",

865

"se.bsnet.fukt.Mandos"))

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

866

1111

# Is this a D-Bus signal?

867

1112

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

868

# Extract the original non-method function by

869

# black magic

870

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(

871

1117

zip(attribute.func_code.co_freevars,

872

attribute.__closure__))["func"]

873

.cell_contents)

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

874

1122

# Create a new, but exactly alike, function

875

1123

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

876

1124

# with the alternate D-Bus interface name

877

new_function = (dbus.service.signal

878

(alt_interface,

879

attribute._dbus_signature)

880

(types.FunctionType(

881

nonmethod_func.func_code,

882

nonmethod_func.func_globals,

883

nonmethod_func.func_name,

884

nonmethod_func.func_defaults,

885

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

886

1148

# Define a creator of a function to call both the

887

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

888

# 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

889

1152

def fixscope(func1, func2):

890

1153

"""This function is a scope container to pass

891

1154

func1 and func2 to the "call_both" function

892

1155

outside of its arguments"""

1156

893

1157

def call_both(*args, **kwargs):

894

1158

"""This function will emit two D-Bus

895

1159

signals by calling func1 and func2"""

896

1160

func1(*args, **kwargs)

897

1161

func2(*args, **kwargs)

1162

898

1163

return call_both

899

1164

# Create the "call_both" function and add it to

900

1165

# the class

901

attr[attrname] = fixscope(attribute,

902

new_function)

1166

attr[attrname] = fixscope(attribute, new_function)

903

1167

# Is this a D-Bus method?

904

1168

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

905

1169

# Create a new, but exactly alike, function

906

1170

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

907

1171

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

908

1172

# to the class.

909

attr[attrname] = (dbus.service.method

910

(alt_interface,

911

attribute._dbus_in_signature,

912

attribute._dbus_out_signature)

913

(types.FunctionType

914

(attribute.func_code,

915

attribute.func_globals,

916

attribute.func_name,

917

attribute.func_defaults,

918

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

919

1189

# Is this a D-Bus property?

920

1190

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

921

1191

# Create a new, but exactly alike, function

922

1192

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

923

1193

# property with the alternate D-Bus interface

924

1194

# name. Add it to the class.

925

attr[attrname] = (dbus_service_property

926

(alt_interface,

927

attribute._dbus_signature,

928

attribute._dbus_access,

929

attribute

930

._dbus_get_args_options

931

["byte_arrays"])

932

(types.FunctionType

933

(attribute.func_code,

934

attribute.func_globals,

935

attribute.func_name,

936

attribute.func_defaults,

937

attribute.func_closure)))

938

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

939

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"})

940

1252

class ClientDBus(Client, DBusObjectWithProperties):

941

1253

"""A Client class using D-Bus

942

1254

946

1258

"""

947

1259

948

1260

runtime_expansions = (Client.runtime_expansions

949

+ ("dbus_object_path",))

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

950

1264

951

1265

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

952

1266

953

1267

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

954

1268

self.bus = bus

955

self._approvals_pending = 0

956

1269

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

957

self.add_to_dbus()

958

959

def add_to_dbus(self):

960

1270

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

961

1271

# the D-Bus

962

client_object_name = unicode(self.name).translate(

1272

client_object_name = str(self.name).translate(

963

1273

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

964

1274

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

965

self.dbus_object_path = (dbus.ObjectPath

966

("/clients/" + client_object_name))

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

967

1277

DBusObjectWithProperties.__init__(self, self.bus,

968

1278

self.dbus_object_path)

969

970

def notifychangeproperty(transform_func,

971

dbus_name, type_func=lambda x: x,

972

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):

973

1285

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

974

1286

its changes to DBus.

975

1287

976

1288

transform_fun: Function that takes a value and a variant_level

977

1289

and transforms it to a D-Bus type.

978

1290

dbus_name: D-Bus name of the variable

980

1292

to the D-Bus. Default: no transform

981

1293

variant_level: D-Bus variant level. Default: 1

982

1294

"""

983

attrname = "_{0}".format(dbus_name)

1295

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

1296

984

1297

def setter(self, value):

985

1298

if hasattr(self, "dbus_object_path"):

986

1299

if (not hasattr(self, attrname) or

987

1300

type_func(getattr(self, attrname, None))

988

1301

!= type_func(value)):

989

dbus_value = transform_func(type_func(value),

990

variant_level

991

=variant_level)

992

self.PropertyChanged(dbus.String(dbus_name),

993

dbus_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())

994

1317

setattr(self, attrname, value)

995

1318

996

1319

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

997

1320

998

999

1321

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1000

1322

approvals_pending = notifychangeproperty(dbus.Boolean,

1001

1323

"ApprovalPending",

1003

1325

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

1004

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

1005

1327

"LastEnabled")

1006

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

1007

type_func = lambda checker:

1008

checker is not None)

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1009

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1010

1332

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1011

1335

last_approval_request = notifychangeproperty(

1012

1336

datetime_to_dbus, "LastApprovalRequest")

1013

1337

approved_by_default = notifychangeproperty(dbus.Boolean,

1014

1338

"ApprovedByDefault")

1015

approval_delay = notifychangeproperty(dbus.UInt16,

1016

"ApprovalDelay",

1017

type_func =

1018

_timedelta_to_milliseconds)

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1019

1342

approval_duration = notifychangeproperty(

1020

dbus.UInt16, "ApprovalDuration",

1021

type_func = _timedelta_to_milliseconds)

1343

dbus.UInt64, "ApprovalDuration",

1344

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

1022

1345

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

1023

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

1024

type_func =

1025

_timedelta_to_milliseconds)

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1026

1349

extended_timeout = notifychangeproperty(

1027

dbus.UInt16, "ExtendedTimeout",

1028

type_func = _timedelta_to_milliseconds)

1029

interval = notifychangeproperty(dbus.UInt16,

1030

"Interval",

1031

type_func =

1032

_timedelta_to_milliseconds)

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)

1033

1355

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

1356

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

1357

invalidate_only=True)

1034

1358

1035

1359

del notifychangeproperty

1036

1360

1043

1367

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

1044

1368

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

1045

1369

1046

def checker_callback(self, pid, condition, command,

1047

*args, **kwargs):

1048

self.checker_callback_tag = None

1049

self.checker = None

1050

if os.WIFEXITED(condition):

1051

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:

1052

1377

# Emit D-Bus signal

1053

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1054

dbus.Int64(condition),

1379

dbus.Int64(0),

1055

1380

dbus.String(command))

1056

1381

else:

1057

1382

# Emit D-Bus signal

1058

1383

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

1059

dbus.Int64(condition),

1384

dbus.Int64(

1385

self.last_checker_signal),

1060

1386

dbus.String(command))

1061

1062

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

1063

*args, **kwargs)

1387

return ret

1064

1388

1065

1389

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

1066

old_checker = self.checker

1067

if self.checker is not None:

1068

old_checker_pid = self.checker.pid

1069

else:

1070

old_checker_pid = None

1390

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

1071

1391

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

1072

1392

# Only if new checker process was started

1073

1393

if (self.checker is not None

1077

1397

return r

1078

1398

1079

1399

def _reset_approved(self):

1080

self._approved = None

1400

self.approved = None

1081

1401

return False

1082

1402

1083

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)

1084

1407

self.send_changedstate()

1085

self._approved = value

1086

gobject.timeout_add(_timedelta_to_milliseconds

1087

(self.approval_duration),

1088

self._reset_approved)

1089

1090

1408

1091

1409

## D-Bus methods, signals & properties

1092

_interface = "se.recompile.Mandos.Client"

1410

1411

## Interfaces

1093

1412

1094

1413

## Signals

1095

1414

1106

1425

pass

1107

1426

1108

1427

# PropertyChanged - signal

1428

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

1109

1429

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

1110

1430

def PropertyChanged(self, property, value):

1111

1431

"D-Bus signal"

1175

1495

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

1176

1496

1177

1497

# ApprovedByDefault - property

1178

@dbus_service_property(_interface, signature="b",

1498

@dbus_service_property(_interface,

1499

signature="b",

1179

1500

access="readwrite")

1180

1501

def ApprovedByDefault_dbus_property(self, value=None):

1181

1502

if value is None: # get

1183

1504

self.approved_by_default = bool(value)

1184

1505

1185

1506

# ApprovalDelay - property

1186

@dbus_service_property(_interface, signature="t",

1507

@dbus_service_property(_interface,

1508

signature="t",

1187

1509

access="readwrite")

1188

1510

def ApprovalDelay_dbus_property(self, value=None):

1189

1511

if value is None: # get

1190

return dbus.UInt64(self.approval_delay_milliseconds())

1512

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

1513

* 1000)

1191

1514

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

1192

1515

1193

1516

# ApprovalDuration - property

1194

@dbus_service_property(_interface, signature="t",

1517

@dbus_service_property(_interface,

1518

signature="t",

1195

1519

access="readwrite")

1196

1520

def ApprovalDuration_dbus_property(self, value=None):

1197

1521

if value is None: # get

1198

return dbus.UInt64(_timedelta_to_milliseconds(

1199

self.approval_duration))

1522

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

1523

* 1000)

1200

1524

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

1201

1525

1202

1526

# Name - property

1210

1534

return dbus.String(self.fingerprint)

1211

1535

1212

1536

# Host - property

1213

@dbus_service_property(_interface, signature="s",

1537

@dbus_service_property(_interface,

1538

signature="s",

1214

1539

access="readwrite")

1215

1540

def Host_dbus_property(self, value=None):

1216

1541

if value is None: # get

1217

1542

return dbus.String(self.host)

1218

self.host = value

1543

self.host = str(value)

1219

1544

1220

1545

# Created - property

1221

1546

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

1222

1547

def Created_dbus_property(self):

1223

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

1548

return datetime_to_dbus(self.created)

1224

1549

1225

1550

# LastEnabled - property

1226

1551

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

1228

1553

return datetime_to_dbus(self.last_enabled)

1229

1554

1230

1555

# Enabled - property

1231

@dbus_service_property(_interface, signature="b",

1556

@dbus_service_property(_interface,

1557

signature="b",

1232

1558

access="readwrite")

1233

1559

def Enabled_dbus_property(self, value=None):

1234

1560

if value is None: # get

1239

1565

self.disable()

1240

1566

1241

1567

# LastCheckedOK - property

1242

@dbus_service_property(_interface, signature="s",

1568

@dbus_service_property(_interface,

1569

signature="s",

1243

1570

access="readwrite")

1244

1571

def LastCheckedOK_dbus_property(self, value=None):

1245

1572

if value is not None:

1247

1574

return

1248

1575

return datetime_to_dbus(self.last_checked_ok)

1249

1576

1577

# LastCheckerStatus - property

1578

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

1579

def LastCheckerStatus_dbus_property(self):

1580

return dbus.Int16(self.last_checker_status)

1581

1250

1582

# Expires - property

1251

1583

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

1252

1584

def Expires_dbus_property(self):

1258

1590

return datetime_to_dbus(self.last_approval_request)

1259

1591

1260

1592

# Timeout - property

1261

@dbus_service_property(_interface, signature="t",

1593

@dbus_service_property(_interface,

1594

signature="t",

1262

1595

access="readwrite")

1263

1596

def Timeout_dbus_property(self, value=None):

1264

1597

if value is None: # get

1265

return dbus.UInt64(self.timeout_milliseconds())

1598

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

1599

old_timeout = self.timeout

1266

1600

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

1267

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

1268

return

1269

# Reschedule timeout

1270

gobject.source_remove(self.disable_initiator_tag)

1271

self.disable_initiator_tag = None

1272

self.expires = None

1273

time_to_die = _timedelta_to_milliseconds((self

1274

.last_checked_ok

1275

+ self.timeout)

1276

- datetime.datetime

1277

.utcnow())

1278

if time_to_die <= 0:

1279

# The timeout has passed

1280

self.disable()

1281

else:

1282

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

1283

+ datetime.timedelta(milliseconds =

1284

time_to_die))

1285

self.disable_initiator_tag = (gobject.timeout_add

1286

(time_to_die, self.disable))

1601

# Reschedule disabling

1602

if self.enabled:

1603

now = datetime.datetime.utcnow()

1604

self.expires += self.timeout - old_timeout

1605

if self.expires <= now:

1606

# The timeout has passed

1607

self.disable()

1608

else:

1609

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

1610

is None):

1611

return

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

1614

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

1615

self.disable)

1287

1616

1288

1617

# ExtendedTimeout - property

1289

@dbus_service_property(_interface, signature="t",

1618

@dbus_service_property(_interface,

1619

signature="t",

1290

1620

access="readwrite")

1291

1621

def ExtendedTimeout_dbus_property(self, value=None):

1292

1622

if value is None: # get

1293

return dbus.UInt64(self.extended_timeout_milliseconds())

1623

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

1624

* 1000)

1294

1625

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

1295

1626

1296

1627

# Interval - property

1297

@dbus_service_property(_interface, signature="t",

1628

@dbus_service_property(_interface,

1629

signature="t",

1298

1630

access="readwrite")

1299

1631

def Interval_dbus_property(self, value=None):

1300

1632

if value is None: # get

1301

return dbus.UInt64(self.interval_milliseconds())

1633

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

1302

1634

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

1303

1635

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

1304

1636

return

1305

# Reschedule checker run

1306

gobject.source_remove(self.checker_initiator_tag)

1307

self.checker_initiator_tag = (gobject.timeout_add

1308

(value, self.start_checker))

1309

self.start_checker() # Start one now, too

1637

if self.enabled:

1638

# Reschedule checker run

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1310

1643

1311

1644

# Checker - property

1312

@dbus_service_property(_interface, signature="s",

1645

@dbus_service_property(_interface,

1646

signature="s",

1313

1647

access="readwrite")

1314

1648

def Checker_dbus_property(self, value=None):

1315

1649

if value is None: # get

1316

1650

return dbus.String(self.checker_command)

1317

self.checker_command = value

1651

self.checker_command = str(value)

1318

1652

1319

1653

# CheckerRunning - property

1320

@dbus_service_property(_interface, signature="b",

1654

@dbus_service_property(_interface,

1655

signature="b",

1321

1656

access="readwrite")

1322

1657

def CheckerRunning_dbus_property(self, value=None):

1323

1658

if value is None: # get

1333

1668

return self.dbus_object_path # is already a dbus.ObjectPath

1334

1669

1335

1670

# Secret = property

1336

@dbus_service_property(_interface, signature="ay",

1337

access="write", byte_arrays=True)

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1338

1675

def Secret_dbus_property(self, value):

1339

self.secret = str(value)

1676

self.secret = bytes(value)

1340

1677

1341

1678

del _interface

1342

1679

1346

1683

self._pipe = child_pipe

1347

1684

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

1348

1685

if not self._pipe.recv():

1349

raise KeyError()

1686

raise KeyError(fpr)

1350

1687

1351

1688

def __getattribute__(self, name):

1352

if(name == '_pipe'):

1689

if name == '_pipe':

1353

1690

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

1354

1691

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

1355

1692

data = self._pipe.recv()

1356

1693

if data[0] == 'data':

1357

1694

return data[1]

1358

1695

if data[0] == 'function':

1696

1359

1697

def func(*args, **kwargs):

1360

1698

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

1361

1699

return self._pipe.recv()[1]

1700

1362

1701

return func

1363

1702

1364

1703

def __setattr__(self, name, value):

1365

if(name == '_pipe'):

1704

if name == '_pipe':

1366

1705

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

1367

1706

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

1368

1707

1369

class ClientDBusTransitional(ClientDBus):

1370

__metaclass__ = AlternateDBusNamesMetaclass

1371

1708

1372

1709

class ClientHandler(socketserver.BaseRequestHandler, object):

1373

1710

"""A class to handle client connections.

1378

1715

def handle(self):

1379

1716

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

1380

1717

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

1381

unicode(self.client_address))

1718

str(self.client_address))

1382

1719

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

1383

1720

self.server.child_pipe.fileno())

1384

1721

1385

session = (gnutls.connection

1386

.ClientSession(self.request,

1387

gnutls.connection

1388

.X509Credentials()))

1722

session = gnutls.connection.ClientSession(

1723

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

1389

1724

1390

1725

# Note: gnutls.connection.X509Credentials is really a

1391

1726

# generic GnuTLS certificate credentials object so long as

1400

1735

priority = self.server.gnutls_priority

1401

1736

if priority is None:

1402

1737

priority = "NORMAL"

1403

(gnutls.library.functions

1404

.gnutls_priority_set_direct(session._c_object,

1405

priority, None))

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1406

1740

1407

1741

# Start communication using the Mandos protocol

1408

1742

# Get protocol number

1410

1744

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

1411

1745

try:

1412

1746

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

1413

raise RuntimeError

1747

raise RuntimeError(line)

1414

1748

except (ValueError, IndexError, RuntimeError) as error:

1415

1749

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

1416

1750

return

1428

1762

approval_required = False

1429

1763

try:

1430

1764

try:

1431

fpr = self.fingerprint(self.peer_certificate

1432

(session))

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1433

1767

except (TypeError,

1434

1768

gnutls.errors.GNUTLSError) as error:

1435

1769

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

1450

1784

while True:

1451

1785

if not client.enabled:

1452

1786

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

1453

client.name)

1787

client.name)

1454

1788

if self.server.use_dbus:

1455

1789

# Emit D-Bus signal

1456

1790

client.Rejected("Disabled")

1457

1791

return

1458

1792

1459

if client._approved or not client.approval_delay:

1793

if client.approved or not client.approval_delay:

1460

1794

#We are approved or approval is disabled

1461

1795

break

1462

elif client._approved is None:

1796

elif client.approved is None:

1463

1797

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

1464

1798

client.name)

1465

1799

if self.server.use_dbus:

1466

1800

# Emit D-Bus signal

1467

1801

client.NeedApproval(

1468

client.approval_delay_milliseconds(),

1469

client.approved_by_default)

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1470

1804

else:

1471

1805

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

1472

1806

client.name)

1478

1812

#wait until timeout or approved

1479

1813

time = datetime.datetime.now()

1480

1814

client.changedstate.acquire()

1481

(client.changedstate.wait

1482

(float(client._timedelta_to_milliseconds(delay)

1483

/ 1000)))

1815

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

1484

1816

client.changedstate.release()

1485

1817

time2 = datetime.datetime.now()

1486

1818

if (time2 - time) >= delay:

1502

1834

try:

1503

1835

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

1504

1836

except gnutls.errors.GNUTLSError as error:

1505

logger.warning("gnutls send failed")

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1506

1839

return

1507

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

1508

sent, len(client.secret)

1509

- (sent_size + sent))

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1510

1843

sent_size += sent

1511

1844

1512

1845

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

1513

1846

# bump the timeout using extended_timeout

1514

client.checked_ok(client.extended_timeout)

1847

client.bump_timeout(client.extended_timeout)

1515

1848

if self.server.use_dbus:

1516

1849

# Emit D-Bus signal

1517

1850

client.GotSecret()

1522

1855

try:

1523

1856

session.bye()

1524

1857

except gnutls.errors.GNUTLSError as error:

1525

logger.warning("GnuTLS bye failed")

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1526

1860

1527

1861

@staticmethod

1528

1862

def peer_certificate(session):

1529

1863

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

1530

1864

# If not an OpenPGP certificate...

1531

if (gnutls.library.functions

1532

.gnutls_certificate_type_get(session._c_object)

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1533

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1534

1868

# ...do the normal thing

1535

1869

return session.peer_certificate

1549

1883

def fingerprint(openpgp):

1550

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1551

1885

# New GnuTLS "datum" with the OpenPGP public key

1552

datum = (gnutls.library.types

1553

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

1554

ctypes.POINTER

1555

(ctypes.c_ubyte)),

1556

ctypes.c_uint(len(openpgp))))

1886

datum = gnutls.library.types.gnutls_datum_t(

1887

ctypes.cast(ctypes.c_char_p(openpgp),

1888

ctypes.POINTER(ctypes.c_ubyte)),

1889

ctypes.c_uint(len(openpgp)))

1557

1890

# New empty GnuTLS certificate

1558

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1559

(gnutls.library.functions

1560

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1561

1894

# Import the OpenPGP public key into the certificate

1562

(gnutls.library.functions

1563

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

1564

gnutls.library.constants

1565

.GNUTLS_OPENPGP_FMT_RAW))

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1566

1898

# Verify the self signature in the key

1567

1899

crtverify = ctypes.c_uint()

1568

(gnutls.library.functions

1569

.gnutls_openpgp_crt_verify_self(crt, 0,

1570

ctypes.byref(crtverify)))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1571

1902

if crtverify.value != 0:

1572

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1573

raise (gnutls.errors.CertificateSecurityError

1574

("Verify failed"))

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1575

1906

# New buffer for the fingerprint

1576

1907

buf = ctypes.create_string_buffer(20)

1577

1908

buf_len = ctypes.c_size_t()

1578

1909

# Get the fingerprint from the certificate into the buffer

1579

(gnutls.library.functions

1580

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

1581

ctypes.byref(buf_len)))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1582

1912

# Deinit the certificate

1583

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1584

1914

# Convert the buffer to a Python bytestring

1585

1915

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

1586

1916

# Convert the bytestring to hexadecimal notation

1587

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

1917

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

1588

1918

return hex_fpr

1589

1919

1590

1920

1591

1921

class MultiprocessingMixIn(object):

1592

1922

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

1923

1593

1924

def sub_process_main(self, request, address):

1594

1925

try:

1595

1926

self.finish_request(request, address)

1596

except:

1927

except Exception:

1597

1928

self.handle_error(request, address)

1598

1929

self.close_request(request)

1599

1930

1600

1931

def process_request(self, request, address):

1601

1932

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

1602

1933

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

1603

args = (request,

1604

address))

1934

args = (request, address))

1605

1935

proc.start()

1606

1936

return proc

1607

1937

1608

1938

1609

1939

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1610

1940

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

1941

1611

1942

def process_request(self, request, client_address):

1612

1943

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

1613

1944

1622

1953

1623

1954

def add_pipe(self, parent_pipe, proc):

1624

1955

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

1625

raise NotImplementedError

1956

raise NotImplementedError()

1626

1957

1627

1958

1628

1959

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1634

1965

interface: None or a network interface name (string)

1635

1966

use_ipv6: Boolean; to use IPv6 or not

1636

1967

"""

1968

1637

1969

def __init__(self, server_address, RequestHandlerClass,

1638

interface=None, use_ipv6=True):

1970

interface=None,

1971

use_ipv6=True,

1972

socketfd=None):

1973

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

1974

creating a new one with socket.socket().

1975

"""

1639

1976

self.interface = interface

1640

1977

if use_ipv6:

1641

1978

self.address_family = socket.AF_INET6

1979

if socketfd is not None:

1980

# Save the file descriptor

1981

self.socketfd = socketfd

1982

# Save the original socket.socket() function

1983

self.socket_socket = socket.socket

1984

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

1985

#

1986

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

1987

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

1988

# patching socket.socket.)

1989

#

1990

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

1991

@functools.wraps(socket.socket)

1992

def socket_wrapper(*args, **kwargs):

1993

# Restore original function so subsequent calls are

1994

# not affected.

1995

socket.socket = self.socket_socket

1996

del self.socket_socket

1997

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

1998

# saved file descriptor.

1999

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

2000

# Replace socket.socket() function with wrapper

2001

socket.socket = socket_wrapper

2002

# The socketserver.TCPServer.__init__ will call

2003

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

2004

# socket_wrapper(), if socketfd was set.

1642

2005

socketserver.TCPServer.__init__(self, server_address,

1643

2006

RequestHandlerClass)

2007

1644

2008

def server_bind(self):

1645

2009

"""This overrides the normal server_bind() function

1646

2010

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

1652

2016

self.interface)

1653

2017

else:

1654

2018

try:

1655

self.socket.setsockopt(socket.SOL_SOCKET,

1656

SO_BINDTODEVICE,

1657

str(self.interface

1658

+ '\0'))

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1659

2022

except socket.error as error:

1660

if error[0] == errno.EPERM:

1661

logger.error("No permission to"

1662

" bind to interface %s",

1663

self.interface)

1664

elif error[0] == errno.ENOPROTOOPT:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

1665

2027

logger.error("SO_BINDTODEVICE not available;"

1666

2028

" cannot bind to interface %s",

1667

2029

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

1668

2033

else:

1669

2034

raise

1670

2035

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

1673

2038

if self.address_family == socket.AF_INET6:

1674

2039

any_address = "::" # in6addr_any

1675

2040

else:

1676

any_address = socket.INADDR_ANY

2041

any_address = "0.0.0.0" # INADDR_ANY

1677

2042

self.server_address = (any_address,

1678

2043

self.server_address[1])

1679

2044

elif not self.server_address[1]:

1680

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

1681

0)

2045

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

1682

2046

# if self.interface:

1683

2047

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

1684

2048

# 0, # port

1698

2062

1699

2063

Assumes a gobject.MainLoop event loop.

1700

2064

"""

2065

1701

2066

def __init__(self, server_address, RequestHandlerClass,

1702

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

1703

gnutls_priority=None, use_dbus=True):

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

1704

2073

self.enabled = False

1705

2074

self.clients = clients

1706

2075

if self.clients is None:

1710

2079

IPv6_TCPServer.__init__(self, server_address,

1711

2080

RequestHandlerClass,

1712

2081

interface = interface,

1713

use_ipv6 = use_ipv6)

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1714

2085

def server_activate(self):

1715

2086

if self.enabled:

1716

2087

return socketserver.TCPServer.server_activate(self)

1720

2091

1721

2092

def add_pipe(self, parent_pipe, proc):

1722

2093

# Call "handle_ipc" for both data and EOF events

1723

gobject.io_add_watch(parent_pipe.fileno(),

1724

gobject.IO_IN | gobject.IO_HUP,

1725

functools.partial(self.handle_ipc,

1726

parent_pipe =

1727

parent_pipe,

1728

proc = proc))

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2097

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

proc = proc))

1729

2100

1730

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

1731

proc = None, client_object=None):

1732

condition_names = {

1733

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

1734

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

1735

# blocking).

1736

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

1737

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

1738

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

1739

# broken, usually for pipes and

1740

# sockets).

1741

}

1742

conditions_string = ' | '.join(name

1743

for cond, name in

1744

condition_names.iteritems()

1745

if cond & condition)

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

1746

2105

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

1747

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

2106

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

1748

2107

# Wait for other process to exit

1749

2108

proc.join()

1750

2109

return False

1771

2130

parent_pipe.send(False)

1772

2131

return False

1773

2132

1774

gobject.io_add_watch(parent_pipe.fileno(),

1775

gobject.IO_IN | gobject.IO_HUP,

1776

functools.partial(self.handle_ipc,

1777

parent_pipe =

1778

parent_pipe,

1779

proc = proc,

1780

client_object =

1781

client))

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2136

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

1782

2140

parent_pipe.send(True)

1783

2141

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

1784

2142

# same fileno

1790

2148

1791

2149

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

1792

2150

funcname)(*args,

1793

**kwargs)))

2151

**kwargs)))

1794

2152

1795

2153

if command == 'getattr':

1796

2154

attrname = request[1]

1797

if callable(client_object.__getattribute__(attrname)):

1798

parent_pipe.send(('function',))

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1799

2158

else:

1800

parent_pipe.send(('data', client_object

1801

.__getattribute__(attrname)))

2159

parent_pipe.send((

2160

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

1802

2161

1803

2162

if command == 'setattr':

1804

2163

attrname = request[1]

1808

2167

return True

1809

2168

1810

2169

2170

def rfc3339_duration_to_delta(duration):

2171

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

2172

2173

>>> rfc3339_duration_to_delta("P7D")

2174

datetime.timedelta(7)

2175

>>> rfc3339_duration_to_delta("PT60S")

2176

datetime.timedelta(0, 60)

2177

>>> rfc3339_duration_to_delta("PT60M")

2178

datetime.timedelta(0, 3600)

2179

>>> rfc3339_duration_to_delta("PT24H")

2180

datetime.timedelta(1)

2181

>>> rfc3339_duration_to_delta("P1W")

2182

datetime.timedelta(7)

2183

>>> rfc3339_duration_to_delta("PT5M30S")

2184

datetime.timedelta(0, 330)

2185

>>> rfc3339_duration_to_delta("P1DT3M20S")

2186

datetime.timedelta(1, 200)

2187

"""

2188

2189

# Parsing an RFC 3339 duration with regular expressions is not

2190

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

2191

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

2192

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

2193

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

2194

# avoid excessive use of external libraries.

2195

2196

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

2197

Token = collections.namedtuple("Token", (

2198

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

2199

# a "group" containing digits

2200

"value", # datetime.timedelta or None

2201

"followers")) # Tokens valid after this token

2202

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

2203

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

2204

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

2205

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

2206

datetime.timedelta(seconds=1),

2207

frozenset((token_end, )))

2208

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

2209

datetime.timedelta(minutes=1),

2210

frozenset((token_second, token_end)))

2211

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

2212

datetime.timedelta(hours=1),

2213

frozenset((token_minute, token_end)))

2214

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

2215

None,

2216

frozenset((token_hour, token_minute,

2217

token_second)))

2218

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

2219

datetime.timedelta(days=1),

2220

frozenset((token_time, token_end)))

2221

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

2222

datetime.timedelta(weeks=4),

2223

frozenset((token_day, token_end)))

2224

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

2225

datetime.timedelta(weeks=52),

2226

frozenset((token_month, token_end)))

2227

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

2228

datetime.timedelta(weeks=1),

2229

frozenset((token_end, )))

2230

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

2231

frozenset((token_year, token_month,

2232

token_day, token_time,

2233

token_week)))

2234

# Define starting values

2235

value = datetime.timedelta() # Value so far

2236

found_token = None

2237

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

2238

s = duration # String left to parse

2239

# Loop until end token is found

2240

while found_token is not token_end:

2241

# Search for any currently valid tokens

2242

for token in followers:

2243

match = token.regexp.match(s)

2244

if match is not None:

2245

# Token found

2246

if token.value is not None:

2247

# Value found, parse digits

2248

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

2249

# Add to value so far

2250

value += factor * token.value

2251

# Strip token from string

2252

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

2253

# Go to found token

2254

found_token = token

2255

# Set valid next tokens

2256

followers = found_token.followers

2257

break

2258

else:

2259

# No currently valid tokens were found

2260

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

2261

.format(duration))

2262

# End token found

2263

return value

2264

2265

1811

2266

def string_to_delta(interval):

1812

2267

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

1813

2268

1824

2279

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

1825

2280

datetime.timedelta(0, 330)

1826

2281

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

1827

2288

timevalue = datetime.timedelta(0)

1828

2289

for s in interval.split():

1829

2290

try:

1830

suffix = unicode(s[-1])

2291

suffix = s[-1]

1831

2292

value = int(s[:-1])

1832

2293

if suffix == "d":

1833

2294

delta = datetime.timedelta(value)

1840

2301

elif suffix == "w":

1841

2302

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

1842

2303

else:

1843

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

1844

except (ValueError, IndexError) as e:

2304

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

2305

except IndexError as e:

1845

2306

raise ValueError(*(e.args))

1846

2307

timevalue += delta

1847

2308

return timevalue

1848

2309

1849

2310

1850

def if_nametoindex(interface):

1851

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

1852

1853

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

1854

global if_nametoindex

1855

try:

1856

if_nametoindex = (ctypes.cdll.LoadLibrary

1857

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

1858

.if_nametoindex)

1859

except (OSError, AttributeError):

1860

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

1861

def if_nametoindex(interface):

1862

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

1863

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

1864

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

1865

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1866

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

1867

interface))

1868

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

1869

ifreq[16:20])[0]

1870

return interface_index

1871

return if_nametoindex(interface)

1872

1873

1874

2311

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

1875

2312

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

1876

2313

1884

2321

sys.exit()

1885

2322

if not noclose:

1886

2323

# Close all standard open file descriptors

1887

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

2324

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

1888

2325

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

1889

2326

raise OSError(errno.ENODEV,

1890

"%s not a character device"

1891

% os.path.devnull)

2327

"{} not a character device"

2328

.format(os.devnull))

1892

2329

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

1893

2330

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

1894

2331

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

1903

2340

1904

2341

parser = argparse.ArgumentParser()

1905

2342

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

1906

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

2343

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

1907

2344

help="show version number and exit")

1908

2345

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

1909

2346

help="Bind to interface IF")

1915

2352

help="Run self-test")

1916

2353

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

1917

2354

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

1918

" to terminal")

2355

" to terminal", default=None)

1919

2356

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

1920

2357

help="Debug level for stdout output")

1921

2358

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

1928

2365

" files")

1929

2366

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

1930

2367

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

1931

" system bus interface")

2368

" system bus interface", default=None)

1932

2369

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

1933

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

2370

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

2371

default=None)

1934

2372

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

1935

dest="restore",

1936

help="Do not restore stored state",

1937

default=True)

1938

2373

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

2374

" state", default=None)

2375

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

2376

help="Specify a file descriptor to a network"

2377

" socket to use instead of creating one")

2378

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

2379

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

2380

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

2381

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

2382

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

2383

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

2384

default=None)

2385

1939

2386

options = parser.parse_args()

1940

2387

1941

2388

if options.check:

1942

2389

import doctest

1943

doctest.testmod()

1944

sys.exit()

2390

fail_count, test_count = doctest.testmod()

2391

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

1945

2392

1946

2393

# Default values for config file for server-global settings

1947

2394

server_defaults = { "interface": "",

1949

2396

"port": "",

1950

2397

"debug": "False",

1951

2398

"priority":

1952

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

2399

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

2400

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

1953

2401

"servicename": "Mandos",

1954

2402

"use_dbus": "True",

1955

2403

"use_ipv6": "True",

1956

2404

"debuglevel": "",

1957

}

2405

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

1958

2411

1959

2412

# Parse config file for server-global settings

1960

2413

server_config = configparser.SafeConfigParser(server_defaults)

1961

2414

del server_defaults

1962

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

1963

"mandos.conf"))

2415

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

1964

2416

# Convert the SafeConfigParser object to a dict

1965

2417

server_settings = server_config.defaults()

1966

2418

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

1967

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

2419

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

1968

2420

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

1969

2421

option)

1970

2422

if server_settings["port"]:

1971

2423

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

1972

2424

"port")

2425

if server_settings["socket"]:

2426

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

2427

"socket")

2428

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

2429

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

2430

# happen with a supplied network socket.

2431

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

2432

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

2433

["socket"])

1973

2434

del server_config

1974

2435

1975

2436

# Override the settings from the config file with command line

1976

2437

# options, if set.

1977

2438

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

1978

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

1979

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

2439

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

2440

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

2441

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

1980

2442

value = getattr(options, option)

1981

2443

if value is not None:

1982

2444

server_settings[option] = value

1983

2445

del options

1984

2446

# Force all strings to be unicode

1985

2447

for option in server_settings.keys():

1986

if type(server_settings[option]) is str:

1987

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

2448

if isinstance(server_settings[option], bytes):

2449

server_settings[option] = (server_settings[option]

2450

.decode("utf-8"))

2451

# Force all boolean options to be boolean

2452

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

2453

"foreground", "zeroconf"):

2454

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

2455

# Debug implies foreground

2456

if server_settings["debug"]:

2457

server_settings["foreground"] = True

1988

2458

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

1989

2459

1990

2460

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

1991

2461

2462

if (not server_settings["zeroconf"]

2463

and not (server_settings["port"]

2464

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

2465

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

2466

1992

2467

# For convenience

1993

2468

debug = server_settings["debug"]

1994

2469

debuglevel = server_settings["debuglevel"]

1995

2470

use_dbus = server_settings["use_dbus"]

1996

2471

use_ipv6 = server_settings["use_ipv6"]

2472

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

2473

stored_state_file)

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2476

2477

if debug:

2478

initlogger(debug, logging.DEBUG)

2479

else:

2480

if not debuglevel:

2481

initlogger(debug)

2482

else:

2483

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

2484

initlogger(debug, level)

1997

2485

1998

2486

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

1999

syslogger.setFormatter(logging.Formatter

2000

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

2001

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

2002

% server_settings["servicename"]))

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

2003

2491

2004

2492

# Parse config file with clients

2005

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

2006

"extended_timeout": "15m",

2007

"interval": "2m",

2008

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

2009

"host": "",

2010

"approval_delay": "0s",

2011

"approval_duration": "1s",

2012

}

2013

client_config = configparser.SafeConfigParser(client_defaults)

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

2014

2495

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

2015

2496

"clients.conf"))

2016

2497

2017

2498

global mandos_dbus_service

2018

2499

mandos_dbus_service = None

2019

2500

2020

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

2021

server_settings["port"]),

2022

ClientHandler,

2023

interface=(server_settings["interface"]

2024

or None),

2025

use_ipv6=use_ipv6,

2026

gnutls_priority=

2027

server_settings["priority"],

2028

use_dbus=use_dbus)

2029

if not debug:

2030

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

2501

socketfd = None

2502

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

2503

socketfd = server_settings["socket"]

2504

tcp_server = MandosServer(

2505

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

2506

ClientHandler,

2507

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

2508

use_ipv6=use_ipv6,

2509

gnutls_priority=server_settings["priority"],

2510

use_dbus=use_dbus,

2511

socketfd=socketfd)

2512

if not foreground:

2513

pidfilename = "/run/mandos.pid"

2514

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

2515

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

2516

pidfile = None

2031

2517

try:

2032

pidfile = open(pidfilename, "w")

2033

except IOError:

2034

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

2518

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

2519

except IOError as e:

2520

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

2521

exc_info=e)

2035

2522

2036

try:

2037

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

2038

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

2039

except KeyError:

2523

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

2040

2524

try:

2041

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

2042

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

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

2043

2528

except KeyError:

2044

try:

2045

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

2046

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

2047

except KeyError:

2048

uid = 65534

2049

gid = 65534

2529

continue

2530

else:

2531

uid = 65534

2532

gid = 65534

2050

2533

try:

2051

2534

os.setgid(gid)

2052

2535

os.setuid(uid)

2053

2536

except OSError as error:

2054

if error[0] != errno.EPERM:

2055

raise error

2056

2057

if not debug and not debuglevel:

2058

logger.setLevel(logging.WARNING)

2059

if debuglevel:

2060

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

2061

logger.setLevel(level)

2537

if error.errno != errno.EPERM:

2538

raise

2062

2539

2063

2540

if debug:

2064

logger.setLevel(logging.DEBUG)

2065

2541

# Enable all possible GnuTLS debugging

2066

2542

2067

2543

# "Use a log level over 10 to enable all debugging options."

2072

2548

def debug_gnutls(level, string):

2073

2549

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

2074

2550

2075

(gnutls.library.functions

2076

.gnutls_global_set_log_function(debug_gnutls))

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2077

2553

2078

2554

# Redirect stdin so all checkers get /dev/null

2079

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

2555

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

2080

2556

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

2081

2557

if null > 2:

2082

2558

os.close(null)

2083

else:

2084

# No console logging

2085

logger.removeHandler(console)

2086

2559

2087

2560

# Need to fork before connecting to D-Bus

2088

if not debug:

2561

if not foreground:

2089

2562

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

2090

2563

daemon()

2091

2564

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2568

2092

2569

global main_loop

2093

2570

# From the Avahi example code

2094

DBusGMainLoop(set_as_default=True )

2571

DBusGMainLoop(set_as_default=True)

2095

2572

main_loop = gobject.MainLoop()

2096

2573

bus = dbus.SystemBus()

2097

2574

# End of Avahi example code

2098

2575

if use_dbus:

2099

2576

try:

2100

2577

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

2101

bus, do_not_queue=True)

2102

old_bus_name = (dbus.service.BusName

2103

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

2104

do_not_queue=True))

2105

except dbus.exceptions.NameExistsException as e:

2106

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

2578

bus,

2579

do_not_queue=True)

2580

old_bus_name = dbus.service.BusName(

2581

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

2582

do_not_queue=True)

2583

except dbus.exceptions.DBusException as e:

2584

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

2107

2585

use_dbus = False

2108

2586

server_settings["use_dbus"] = False

2109

2587

tcp_server.use_dbus = False

2110

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2111

service = AvahiServiceToSyslog(name =

2112

server_settings["servicename"],

2113

servicetype = "_mandos._tcp",

2114

protocol = protocol, bus = bus)

2115

if server_settings["interface"]:

2116

service.interface = (if_nametoindex

2117

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

2588

if zeroconf:

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

2595

if server_settings["interface"]:

2596

service.interface = if_nametoindex(

2597

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

2118

2598

2119

2599

global multiprocessing_manager

2120

2600

multiprocessing_manager = multiprocessing.Manager()

2121

2601

2122

2602

client_class = Client

2123

2603

if use_dbus:

2124

client_class = functools.partial(ClientDBusTransitional,

2125

bus = bus)

2126

2127

special_settings = {

2128

# Some settings need to be accessd by special methods;

2129

# booleans need .getboolean(), etc. Here is a list of them:

2130

"approved_by_default":

2131

lambda section:

2132

client_config.getboolean(section, "approved_by_default"),

2133

}

2134

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

2135

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

2136

# with exceptions for any special settings as defined above

2137

client_settings = dict((clientname,

2138

dict((setting,

2139

(value if

2140

setting not in special_settings

2141

else special_settings[setting]

2142

(clientname)))

2143

for setting, value

2144

in client_config.items(clientname)))

2145

for clientname in client_config.sections())

2146

2604

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

2605

2606

client_settings = Client.config_parser(client_config)

2147

2607

old_client_settings = {}

2148

clients_data = []

2149

2150

# Get client data and settings from last running state.

2608

clients_data = {}

2609

2610

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

2611

global wnull

2612

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

2613

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

2614

# mode

2615

if debug or not foreground:

2616

wnull.close()

2617

2618

# Get client data and settings from last running state.

2151

2619

if server_settings["restore"]:

2152

2620

try:

2153

2621

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

2154

clients_data, old_client_settings = (

2155

pickle.load(stored_state))

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2156

2624

os.remove(stored_state_path)

2157

2625

except IOError as e:

2158

logger.warning("Could not load persistant state: {0}"

2159

.format(e))

2160

if e.errno != errno.ENOENT:

2626

if e.errno == errno.ENOENT:

2627

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

2628

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

2629

else:

2630

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

2631

exc_info=e)

2161

2632

raise

2162

2163

for client in clients_data:

2164

client_name = client["name"]

2165

2166

# Decide which value to use after restoring saved state.

2167

# We have three different values: Old config file,

2168

# new config file, and saved state.

2169

# New config value takes precedence if it differs from old

2170

# config value, otherwise use saved state.

2171

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

2633

except EOFError as e:

2634

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

2635

"EOFError:",

2636

exc_info=e)

2637

2638

with PGPEngine() as pgp:

2639

for client_name, client in clients_data.items():

2640

# Skip removed clients

2641

if client_name not in client_settings:

2642

continue

2643

2644

# Decide which value to use after restoring saved state.

2645

# We have three different values: Old config file,

2646

# new config file, and saved state.

2647

# New config value takes precedence if it differs from old

2648

# config value, otherwise use saved state.

2649

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

2650

try:

2651

# For each value in new config, check if it

2652

# differs from the old config value (Except for

2653

# the "secret" attribute)

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2657

client[name] = value

2658

except KeyError:

2659

pass

2660

2661

# Clients who has passed its expire date can still be

2662

# enabled if its last checker was successful. A Client

2663

# whose checker succeeded before we stored its state is

2664

# assumed to have successfully run all checkers during

2665

# downtime.

2666

if client["enabled"]:

2667

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

2668

if not client["last_checked_ok"]:

2669

logger.warning(

2670

"disabling client {} - Client never "

2671

"performed a successful checker".format(

2672

client_name))

2673

client["enabled"] = False

2674

elif client["last_checker_status"] != 0:

2675

logger.warning(

2676

"disabling client {} - Client last"

2677

" checker failed with error code"

2678

" {}".format(

2679

client_name,

2680

client["last_checker_status"]))

2681

client["enabled"] = False

2682

else:

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2686

logger.debug("Last checker succeeded,"

2687

" keeping {} enabled".format(

2688

client_name))

2172

2689

try:

2173

# For each value in new config, check if it differs

2174

# from the old config value (Except for the "secret"

2175

# attribute)

2176

if (name != "secret" and

2177

value != old_client_settings[client_name][name]):

2178

setattr(client, name, value)

2179

except KeyError:

2180

pass

2181

2182

# Clients who has passed its expire date, can still be enabled

2183

# if its last checker was sucessful. Clients who checkers

2184

# failed before we stored it state is asumed to had failed

2185

# checker during downtime.

2186

if client["enabled"] and client["last_checked_ok"]:

2187

if ((datetime.datetime.utcnow()

2188

- client["last_checked_ok"]) > client["interval"]):

2189

if client["last_checker_status"] != 0:

2190

client["enabled"] = False

2191

else:

2192

client["expires"] = (datetime.datetime.utcnow()

2193

+ client["timeout"])

2194

2195

client["changedstate"] = (multiprocessing_manager

2196

.Condition(multiprocessing_manager

2197

.Lock()))

2198

if use_dbus:

2199

new_client = ClientDBusTransitional.__new__(

2200

ClientDBusTransitional)

2201

tcp_server.clients[client_name] = new_client

2202

new_client.bus = bus

2203

for name, value in client.iteritems():

2204

setattr(new_client, name, value)

2205

new_client._approvals_pending = 0

2206

new_client.add_to_dbus()

2207

else:

2208

tcp_server.clients[client_name] = Client.__new__(Client)

2209

for name, value in client.iteritems():

2210

setattr(tcp_server.clients[client_name], name, value)

2211

2212

tcp_server.clients[client_name].decrypt_secret(

2213

client_settings[client_name]["secret"])

2214

2215

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

2216

for clientname in set(old_client_settings) - set(client_settings):

2217

del tcp_server.clients[clientname]

2218

for clientname in set(client_settings) - set(old_client_settings):

2219

tcp_server.clients[clientname] = client_class(name

2220

= clientname,

2221

config =

2222

client_settings

2223

[clientname])

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2693

except PGPError:

2694

# If decryption fails, we use secret from new settings

2695

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

2696

client_name))

2697

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

2698

["secret"])

2699

2700

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

2701

for client_name in (set(old_client_settings)

2702

- set(client_settings)):

2703

del clients_data[client_name]

2704

for client_name in (set(client_settings)

2705

- set(old_client_settings)):

2706

clients_data[client_name] = client_settings[client_name]

2707

2708

# Create all client objects

2709

for client_name, client in clients_data.items():

2710

tcp_server.clients[client_name] = client_class(

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2224

2714

2225

2715

if not tcp_server.clients:

2226

2716

logger.warning("No clients defined")

2227

2228

if not debug:

2229

try:

2230

with pidfile:

2231

pid = os.getpid()

2232

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

2233

del pidfile

2234

except IOError:

2235

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

2236

pidfilename, pid)

2237

except NameError:

2238

# "pidfile" was never created

2239

pass

2717

2718

if not foreground:

2719

if pidfile is not None:

2720

pid = os.getpid()

2721

try:

2722

with pidfile:

2723

print(pid, file=pidfile)

2724

except IOError:

2725

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

2726

pidfilename, pid)

2727

del pidfile

2240

2728

del pidfilename

2241

2242

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

2243

2729

2244

2730

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

2245

2731

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

2246

2732

2247

2733

if use_dbus:

2248

class MandosDBusService(dbus.service.Object):

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2249

2738

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

2739

2250

2740

def __init__(self):

2251

2741

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

2742

2252

2743

_interface = "se.recompile.Mandos"

2253

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2254

2751

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

2255

2752

def ClientAdded(self, objpath):

2256

2753

"D-Bus signal"

2269

2766

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

2270

2767

def GetAllClients(self):

2271

2768

"D-Bus method"

2272

return dbus.Array(c.dbus_object_path

2273

for c in

2769

return dbus.Array(c.dbus_object_path for c in

2274

2770

tcp_server.clients.itervalues())

2275

2771

2276

2772

@dbus.service.method(_interface,

2278

2774

def GetAllClientsWithProperties(self):

2279

2775

"D-Bus method"

2280

2776

return dbus.Dictionary(

2281

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

2282

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

2777

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

2778

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

2283

2779

signature="oa{sv}")

2284

2780

2285

2781

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

2298

2794

2299

2795

del _interface

2300

2796

2301

class MandosDBusServiceTransitional(MandosDBusService):

2302

__metaclass__ = AlternateDBusNamesMetaclass

2303

mandos_dbus_service = MandosDBusServiceTransitional()

2797

mandos_dbus_service = MandosDBusService()

2304

2798

2305

2799

def cleanup():

2306

2800

"Cleanup function; run on exit"

2307

service.cleanup()

2801

if zeroconf:

2802

service.cleanup()

2308

2803

2309

2804

multiprocessing.active_children()

2805

wnull.close()

2310

2806

if not (tcp_server.clients or client_settings):

2311

2807

return

2312

2808

2313

2809

# Store client before exiting. Secrets are encrypted with key

2314

2810

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

2315

2811

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

2316

clients = []

2317

for client in tcp_server.clients.itervalues():

2318

client.encrypt_secret(

2319

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

2320

2321

client_dict = {}

2322

2323

# A list of attributes that will not be stored when

2324

# shutting down.

2325

exclude = set(("bus", "changedstate", "secret"))

2326

for name, typ in inspect.getmembers(dbus.service.Object):

2327

exclude.add(name)

2328

2329

client_dict["encrypted_secret"] = client.encrypted_secret

2330

for attr in client.client_structure:

2331

if attr not in exclude:

2332

client_dict[attr] = getattr(client, attr)

2333

2334

clients.append(client_dict)

2335

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

2336

2812

clients = {}

2813

with PGPEngine() as pgp:

2814

for client in tcp_server.clients.itervalues():

2815

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

2816

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

2817

key)

2818

client_dict = {}

2819

2820

# A list of attributes that can not be pickled

2821

# + secret.

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2826

exclude.add(name)

2827

2828

client_dict["encrypted_secret"] = (client

2829

.encrypted_secret)

2830

for attr in client.client_structure:

2831

if attr not in exclude:

2832

client_dict[attr] = getattr(client, attr)

2833

2834

clients[client.name] = client_dict

2835

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

2836

2337

2837

try:

2338

with os.fdopen(os.open(stored_state_path,

2339

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2340

stat.S_IRUSR | stat.S_IWUSR),

2341

"wb") as stored_state:

2838

with tempfile.NamedTemporaryFile(

2839

mode='wb',

2840

suffix=".pickle",

2841

prefix='clients-',

2842

dir=os.path.dirname(stored_state_path),

2843

delete=False) as stored_state:

2342

2844

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

2343

except IOError as e:

2344

logger.warning("Could not save persistant state: {0}"

2345

.format(e))

2346

if e.errno != errno.ENOENT:

2845

tempname = stored_state.name

2846

os.rename(tempname, stored_state_path)

2847

except (IOError, OSError) as e:

2848

if not debug:

2849

try:

2850

os.remove(tempname)

2851

except NameError:

2852

pass

2853

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

2854

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

2855

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

2856

else:

2857

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

2858

exc_info=e)

2347

2859

raise

2348

2860

2349

2861

# Delete all clients, and settings from config

2350

2862

while tcp_server.clients:

2351

2863

name, client = tcp_server.clients.popitem()

2355

2867

client.disable(quiet=True)

2356

2868

if use_dbus:

2357

2869

# Emit D-Bus signal

2358

mandos_dbus_service.ClientRemoved(client

2359

.dbus_object_path,

2360

client.name)

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2361

2872

client_settings.clear()

2362

2873

2363

2874

atexit.register(cleanup)

2369

2880

# Need to initiate checking of clients

2370

2881

if client.enabled:

2371

2882

client.init_checker()

2372

2373

2883

2374

2884

tcp_server.enable()

2375

2885

tcp_server.server_activate()

2376

2886

2377

2887

# Find out what port we got

2378

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

2888

if zeroconf:

2889

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

2379

2890

if use_ipv6:

2380

2891

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

2381

" flowinfo %d, scope_id %d"

2382

% tcp_server.socket.getsockname())

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2383

2894

else: # IPv4

2384

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

2385

% tcp_server.socket.getsockname())

2895

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

2896

*tcp_server.socket.getsockname())

2386

2897

2387

2898

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

2388

2899

2389

2900

try:

2390

# From the Avahi example code

2391

try:

2392

service.activate()

2393

except dbus.exceptions.DBusException as error:

2394

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

2395

cleanup()

2396

sys.exit(1)

2397

# End of Avahi example code

2901

if zeroconf:

2902

# From the Avahi example code

2903

try:

2904

service.activate()

2905

except dbus.exceptions.DBusException as error:

2906

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

2907

cleanup()

2908

sys.exit(1)

2909

# End of Avahi example code

2398

2910

2399

2911

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

2400

2912

lambda *args, **kwargs:

2404

2916

logger.debug("Starting main loop")

2405

2917

main_loop.run()

2406

2918

except AvahiError as error:

2407

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

2919

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

2408

2920

cleanup()

2409

2921

sys.exit(1)

2410

2922

except KeyboardInterrupt: