/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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396

self.cleanup()

250

397

elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

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

408

self.cleanup()

409

os._exit(1)

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else:

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411

if error is None:

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412

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

255

413

else:

256

414

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

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257

416

def activate(self):

258

417

"""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

426

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

268

427

428

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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'

276

% 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

310

473

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

311

474

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

312

475

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

313

last_checker_status: integer between 0 and 255 reflecting exit status

314

of last checker. -1 reflect crashed checker,

315

or None.

316

last_enabled: datetime.datetime(); (UTC)

476

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

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

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

487

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",

497

"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 in self.__dict__.iterkeys() if not attr.startswith("_")]

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

597

if not attr.startswith("_")]

402

598

self.client_structure.append("client_structure")

403

404

405

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

406

lambda obj: isinstance(obj, property)):

599

600

for name, t in inspect.getmembers(

601

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

407

602

if not name.startswith("_"):

408

603

self.client_structure.append(name)

409

604

417

612

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

418

613

# Already enabled

419

614

return

420

self.send_changedstate()

421

615

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

422

616

self.enabled = True

423

617

self.last_enabled = datetime.datetime.utcnow()

424

618

self.init_checker()

619

self.send_changedstate()

425

620

426

621

def disable(self, quiet=True):

427

622

"""Disable this client."""

428

623

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

429

624

return False

430

625

if not quiet:

431

self.send_changedstate()

432

if not quiet:

433

626

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

434

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

627

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

435

628

gobject.source_remove(self.disable_initiator_tag)

436

629

self.disable_initiator_tag = None

437

630

self.expires = None

438

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

631

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

439

632

gobject.source_remove(self.checker_initiator_tag)

440

633

self.checker_initiator_tag = None

441

634

self.stop_checker()

442

635

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

443

638

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

444

639

return False

445

640

446

641

def __del__(self):

447

642

self.disable()

448

643

449

644

def init_checker(self):

450

645

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

451

646

# and every interval from then on.

452

self.checker_initiator_tag = (gobject.timeout_add

453

(self.interval_milliseconds(),

454

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)

455

652

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

456

self.disable_initiator_tag = (gobject.timeout_add

457

(self.timeout_milliseconds(),

458

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)

459

657

# Also start a new checker *right now*.

460

658

self.start_checker()

461

462

463

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

659

660

def checker_callback(self, source, condition, connection,

661

command):

464

662

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

465

663

self.checker_callback_tag = None

466

664

self.checker = None

467

if os.WIFEXITED(condition):

468

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

469

672

if self.last_checker_status == 0:

470

673

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

471

674

vars(self))

472

675

self.checked_ok()

473

676

else:

474

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

475

vars(self))

677

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

476

678

else:

477

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

478

681

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

479

682

vars(self))

480

481

def checked_ok(self, timeout=None):

482

"""Bump up the timeout for this client.

483

484

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

485

alive and well.

486

"""

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."""

487

694

if timeout is None:

488

695

timeout = self.timeout

489

self.last_checked_ok = datetime.datetime.utcnow()

490

696

if self.disable_initiator_tag is not None:

491

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

492

699

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

493

self.disable_initiator_tag = (gobject.timeout_add

494

(_timedelta_to_milliseconds

495

(timeout), self.disable))

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

496

702

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

497

703

498

704

def need_approval(self):

504

710

If a checker already exists, leave it running and do

505

711

nothing."""

506

712

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

507

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

508

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

509

# client would inevitably timeout, since no checker would get

510

# 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

511

717

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

512

718

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

513

719

# should be.

514

720

515

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

516

try:

517

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

518

except (AttributeError, OSError) as error:

519

if (isinstance(error, OSError)

520

and error.errno != errno.ECHILD):

521

raise error

522

else:

523

if pid:

524

logger.warning("Checker was a zombie")

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status,

527

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

528

725

# Start a new checker if needed

529

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 }

530

731

try:

531

# In case checker_command has exactly one % operator

532

command = self.checker_command % self.host

533

except TypeError:

534

# Escape attributes for the shell

535

escaped_attrs = dict(

536

(attr,

537

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

538

errors=

539

'replace')))

540

for attr in

541

self.runtime_expansions)

542

543

try:

544

command = self.checker_command % escaped_attrs

545

except TypeError as error:

546

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

547

' %s', self.checker_command, error)

548

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

549

738

self.current_checker_command = command

550

try:

551

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

552

command, self.name)

553

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

554

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

555

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

556

# always replaced by /dev/null.)

557

self.checker = subprocess.Popen(command,

558

close_fds=True,

559

shell=True, cwd="/")

560

self.checker_callback_tag = (gobject.child_watch_add

561

(self.checker.pid,

562

self.checker_callback,

563

data=command))

564

# The checker may have completed before the gobject

565

# watch was added. Check for this.

566

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

567

if pid:

568

gobject.source_remove(self.checker_callback_tag)

569

self.checker_callback(pid, status, command)

570

except OSError as error:

571

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

572

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)

573

764

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

574

765

return True

575

766

581

772

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

582

773

return

583

774

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

584

try:

585

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

586

#time.sleep(0.5)

587

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

588

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

589

except OSError as error:

590

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

591

raise

775

self.checker.terminate()

592

776

self.checker = None

593

777

594

# Encrypts a client secret and stores it in a varible encrypted_secret

595

def encrypt_secret(self, key):

596

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

597

hasheng = hashlib.sha256()

598

hasheng.update(key)

599

encryptionkey = hasheng.digest()

600

601

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

602

hasheng = hashlib.sha256()

603

hasheng.update(self.secret)

604

validationhash = hasheng.digest()

605

606

# Encrypt secret

607

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

608

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

609

Crypto.Cipher.AES.MODE_CFB, iv)

610

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

611

self.encrypted_secret = (ciphertext, iv)

612

613

# Decrypt a encrypted client secret

614

def decrypt_secret(self, key):

615

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

616

hasheng = hashlib.sha256()

617

hasheng.update(key)

618

encryptionkey = hasheng.digest()

619

620

# Decrypt encrypted secret

621

ciphertext, iv = self.encrypted_secret

622

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

623

Crypto.Cipher.AES.MODE_CFB, iv)

624

plain = ciphereng.decrypt(ciphertext)

625

626

# Validate decrypted secret to know if it was succesful

627

hasheng = hashlib.sha256()

628

validationhash = plain[:hasheng.digest_size]

629

secret = plain[hasheng.digest_size:]

630

hasheng.update(secret)

631

632

# if validation fails, we use key as new secret. Otherwhise, we use

633

# the decrypted secret

634

if hasheng.digest() == validationhash:

635

self.secret = secret

636

else:

637

self.secret = key

638

del self.encrypted_secret

639

640

641

def dbus_service_property(dbus_interface, signature="v",

642

access="readwrite", byte_arrays=False):

778

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

643

783

"""Decorators for marking methods of a DBusObjectWithProperties to

644

784

become properties on the D-Bus.

645

785

654

794

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

655

795

if byte_arrays and signature != "ay":

656

796

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

657

" signature %r" % signature)

797

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

798

658

799

def decorator(func):

659

800

func._dbus_is_property = True

660

801

func._dbus_interface = dbus_interface

665

806

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

666

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

667

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

668

851

return decorator

669

852

670

853

671

854

class DBusPropertyException(dbus.exceptions.DBusException):

672

855

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

673

856

"""

674

def __unicode__(self):

675

return unicode(str(self))

857

pass

676

858

677

859

678

860

class DBusPropertyAccessException(DBusPropertyException):

696

878

"""

697

879

698

880

@staticmethod

699

def _is_dbus_property(obj):

700

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)

701

889

702

def _get_all_dbus_properties(self):

890

def _get_all_dbus_things(self, thing):

703

891

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

704

892

"""

705

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

893

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

894

athing.__get__(self))

706

895

for cls in self.__class__.__mro__

707

for name, prop in

708

inspect.getmembers(cls, self._is_dbus_property))

896

for name, athing in

897

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

709

898

710

899

def _get_dbus_property(self, interface_name, property_name):

711

900

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

712

901

property with the specified name and interface.

713

902

"""

714

for cls in self.__class__.__mro__:

715

for name, value in (inspect.getmembers

716

(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")):

717

906

if (value._dbus_name == property_name

718

907

and value._dbus_interface == interface_name):

719

908

return value.__get__(self)

720

909

721

910

# No such property

722

raise DBusPropertyNotFound(self.dbus_object_path + ":"

723

+ interface_name + "."

724

+ property_name)

911

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

912

self.dbus_object_path, interface_name, property_name))

725

913

726

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

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

727

916

out_signature="v")

728

917

def Get(self, interface_name, property_name):

729

918

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

747

936

# The byte_arrays option is not supported yet on

748

937

# signatures other than "ay".

749

938

if prop._dbus_signature != "ay":

750

raise ValueError

751

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

752

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))

753

944

prop(value)

754

945

755

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

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

756

948

out_signature="a{sv}")

757

949

def GetAll(self, interface_name):

758

950

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

760

952

761

953

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

762

954

"""

763

all = {}

764

for name, prop in self._get_all_dbus_properties():

955

properties = {}

956

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

765

957

if (interface_name

766

958

and interface_name != prop._dbus_interface):

767

959

# Interface non-empty but did not match

771

963

continue

772

964

value = prop()

773

965

if not hasattr(value, "variant_level"):

774

all[name] = value

966

properties[name] = value

775

967

continue

776

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

777

value.variant_level+1)

778

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

779

979

780

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

781

981

out_signature="s",

782

982

path_keyword='object_path',

783

983

connection_keyword='connection')

784

984

def Introspect(self, object_path, connection):

785

"""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.

786

988

"""

787

989

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

788

990

connection)

789

991

try:

790

992

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

993

791

994

def make_tag(document, name, prop):

792

995

e = document.createElement("property")

793

996

e.setAttribute("name", name)

794

997

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

795

998

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

796

999

return e

1000

797

1001

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

1002

# Add property tags

798

1003

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

799

1004

for name, prop

800

in self._get_all_dbus_properties()

1005

in self._get_all_dbus_things("property")

801

1006

if prop._dbus_interface

802

1007

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

803

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)

804

1038

# Add the names to the return values for the

805

1039

# "org.freedesktop.DBus.Properties" methods

806

1040

if (if_tag.getAttribute("name")

821

1055

except (AttributeError, xml.dom.DOMException,

822

1056

xml.parsers.expat.ExpatError) as error:

823

1057

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

824

error)

1058

exc_info=error)

825

1059

return xmlstring

826

1060

827

1061

828

def datetime_to_dbus (dt, variant_level=0):

1062

def datetime_to_dbus(dt, variant_level=0):

829

1063

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

830

1064

if dt is None:

831

1065

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

832

return dbus.String(dt.isoformat(),

833

variant_level=variant_level)

834

835

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

836

.__metaclass__):

837

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

838

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).

839

1091

"""

840

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

841

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

842

# methods, signals, or properties in them

843

for base in (b for b in bases

844

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

845

# Go though all attributes of the base class

846

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):

847

1100

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

848

1101

# with the wrong interface name

849

1102

if (not hasattr(attribute, "_dbus_interface")

850

or not attribute._dbus_interface

851

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

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

852

1105

continue

853

1106

# Create an alternate D-Bus interface name based on

854

1107

# the current name

855

alt_interface = (attribute._dbus_interface

856

.replace("se.recompile.Mandos",

857

"se.bsnet.fukt.Mandos"))

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

858

1111

# Is this a D-Bus signal?

859

1112

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

860

# Extract the original non-method function by

861

# black magic

862

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(

863

1117

zip(attribute.func_code.co_freevars,

864

attribute.__closure__))["func"]

865

.cell_contents)

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

866

1122

# Create a new, but exactly alike, function

867

1123

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

868

1124

# with the alternate D-Bus interface name

869

new_function = (dbus.service.signal

870

(alt_interface,

871

attribute._dbus_signature)

872

(types.FunctionType(

873

nonmethod_func.func_code,

874

nonmethod_func.func_globals,

875

nonmethod_func.func_name,

876

nonmethod_func.func_defaults,

877

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

878

1148

# Define a creator of a function to call both the

879

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

880

# 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

881

1152

def fixscope(func1, func2):

882

1153

"""This function is a scope container to pass

883

1154

func1 and func2 to the "call_both" function

884

1155

outside of its arguments"""

1156

885

1157

def call_both(*args, **kwargs):

886

1158

"""This function will emit two D-Bus

887

1159

signals by calling func1 and func2"""

888

1160

func1(*args, **kwargs)

889

1161

func2(*args, **kwargs)

1162

890

1163

return call_both

891

1164

# Create the "call_both" function and add it to

892

1165

# the class

893

attr[attrname] = fixscope(attribute,

894

new_function)

1166

attr[attrname] = fixscope(attribute, new_function)

895

1167

# Is this a D-Bus method?

896

1168

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

897

1169

# Create a new, but exactly alike, function

898

1170

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

899

1171

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

900

1172

# to the class.

901

attr[attrname] = (dbus.service.method

902

(alt_interface,

903

attribute._dbus_in_signature,

904

attribute._dbus_out_signature)

905

(types.FunctionType

906

(attribute.func_code,

907

attribute.func_globals,

908

attribute.func_name,

909

attribute.func_defaults,

910

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

911

1189

# Is this a D-Bus property?

912

1190

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

913

1191

# Create a new, but exactly alike, function

914

1192

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

915

1193

# property with the alternate D-Bus interface

916

1194

# name. Add it to the class.

917

attr[attrname] = (dbus_service_property

918

(alt_interface,

919

attribute._dbus_signature,

920

attribute._dbus_access,

921

attribute

922

._dbus_get_args_options

923

["byte_arrays"])

924

(types.FunctionType

925

(attribute.func_code,

926

attribute.func_globals,

927

attribute.func_name,

928

attribute.func_defaults,

929

attribute.func_closure)))

930

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

931

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"})

932

1252

class ClientDBus(Client, DBusObjectWithProperties):

933

1253

"""A Client class using D-Bus

934

1254

938

1258

"""

939

1259

940

1260

runtime_expansions = (Client.runtime_expansions

941

+ ("dbus_object_path",))

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

942

1264

943

1265

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

944

1266

945

1267

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

946

1268

self.bus = bus

947

1269

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

948

949

self._approvals_pending = 0

950

1270

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

951

1271

# the D-Bus

952

client_object_name = unicode(self.name).translate(

1272

client_object_name = str(self.name).translate(

953

1273

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

954

1274

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

955

self.dbus_object_path = (dbus.ObjectPath

956

("/clients/" + client_object_name))

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

957

1277

DBusObjectWithProperties.__init__(self, self.bus,

958

1278

self.dbus_object_path)

959

960

def notifychangeproperty(transform_func,

961

dbus_name, type_func=lambda x: x,

962

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):

963

1285

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

964

1286

its changes to DBus.

965

1287

966

1288

transform_fun: Function that takes a value and a variant_level

967

1289

and transforms it to a D-Bus type.

968

1290

dbus_name: D-Bus name of the variable

970

1292

to the D-Bus. Default: no transform

971

1293

variant_level: D-Bus variant level. Default: 1

972

1294

"""

973

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

1295

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

1296

974

1297

def setter(self, value):

975

1298

if hasattr(self, "dbus_object_path"):

976

1299

if (not hasattr(self, attrname) or

977

1300

type_func(getattr(self, attrname, None))

978

1301

!= type_func(value)):

979

dbus_value = transform_func(type_func(value),

980

variant_level

981

=variant_level)

982

self.PropertyChanged(dbus.String(dbus_name),

983

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())

984

1317

setattr(self, attrname, value)

985

1318

986

1319

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

987

1320

988

989

1321

expires = notifychangeproperty(datetime_to_dbus, "Expires")

990

1322

approvals_pending = notifychangeproperty(dbus.Boolean,

991

1323

"ApprovalPending",

993

1325

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

994

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

995

1327

"LastEnabled")

996

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

997

type_func = lambda checker:

998

checker is not None)

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

999

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1000

1332

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1001

1335

last_approval_request = notifychangeproperty(

1002

1336

datetime_to_dbus, "LastApprovalRequest")

1003

1337

approved_by_default = notifychangeproperty(dbus.Boolean,

1004

1338

"ApprovedByDefault")

1005

approval_delay = notifychangeproperty(dbus.UInt16,

1006

"ApprovalDelay",

1007

type_func =

1008

_timedelta_to_milliseconds)

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1009

1342

approval_duration = notifychangeproperty(

1010

dbus.UInt16, "ApprovalDuration",

1011

type_func = _timedelta_to_milliseconds)

1343

dbus.UInt64, "ApprovalDuration",

1344

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

1012

1345

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

1013

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

1014

type_func =

1015

_timedelta_to_milliseconds)

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1016

1349

extended_timeout = notifychangeproperty(

1017

dbus.UInt16, "ExtendedTimeout",

1018

type_func = _timedelta_to_milliseconds)

1019

interval = notifychangeproperty(dbus.UInt16,

1020

"Interval",

1021

type_func =

1022

_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)

1023

1355

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

1356

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

1357

invalidate_only=True)

1024

1358

1025

1359

del notifychangeproperty

1026

1360

1033

1367

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

1034

1368

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

1035

1369

1036

def checker_callback(self, pid, condition, command,

1037

*args, **kwargs):

1038

self.checker_callback_tag = None

1039

self.checker = None

1040

if os.WIFEXITED(condition):

1041

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:

1042

1377

# Emit D-Bus signal

1043

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1044

dbus.Int64(condition),

1379

dbus.Int64(0),

1045

1380

dbus.String(command))

1046

1381

else:

1047

1382

# Emit D-Bus signal

1048

1383

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

1049

dbus.Int64(condition),

1384

dbus.Int64(

1385

self.last_checker_signal),

1050

1386

dbus.String(command))

1051

1052

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

1053

*args, **kwargs)

1387

return ret

1054

1388

1055

1389

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

1056

old_checker = self.checker

1057

if self.checker is not None:

1058

old_checker_pid = self.checker.pid

1059

else:

1060

old_checker_pid = None

1390

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

1061

1391

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

1062

1392

# Only if new checker process was started

1063

1393

if (self.checker is not None

1067

1397

return r

1068

1398

1069

1399

def _reset_approved(self):

1070

self._approved = None

1400

self.approved = None

1071

1401

return False

1072

1402

1073

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)

1074

1407

self.send_changedstate()

1075

self._approved = value

1076

gobject.timeout_add(_timedelta_to_milliseconds

1077

(self.approval_duration),

1078

self._reset_approved)

1079

1080

1408

1081

1409

## D-Bus methods, signals & properties

1082

_interface = "se.recompile.Mandos.Client"

1410

1411

## Interfaces

1083

1412

1084

1413

## Signals

1085

1414

1096

1425

pass

1097

1426

1098

1427

# PropertyChanged - signal

1428

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

1099

1429

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

1100

1430

def PropertyChanged(self, property, value):

1101

1431

"D-Bus signal"

1165

1495

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

1166

1496

1167

1497

# ApprovedByDefault - property

1168

@dbus_service_property(_interface, signature="b",

1498

@dbus_service_property(_interface,

1499

signature="b",

1169

1500

access="readwrite")

1170

1501

def ApprovedByDefault_dbus_property(self, value=None):

1171

1502

if value is None: # get

1173

1504

self.approved_by_default = bool(value)

1174

1505

1175

1506

# ApprovalDelay - property

1176

@dbus_service_property(_interface, signature="t",

1507

@dbus_service_property(_interface,

1508

signature="t",

1177

1509

access="readwrite")

1178

1510

def ApprovalDelay_dbus_property(self, value=None):

1179

1511

if value is None: # get

1180

return dbus.UInt64(self.approval_delay_milliseconds())

1512

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

1513

* 1000)

1181

1514

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

1182

1515

1183

1516

# ApprovalDuration - property

1184

@dbus_service_property(_interface, signature="t",

1517

@dbus_service_property(_interface,

1518

signature="t",

1185

1519

access="readwrite")

1186

1520

def ApprovalDuration_dbus_property(self, value=None):

1187

1521

if value is None: # get

1188

return dbus.UInt64(_timedelta_to_milliseconds(

1189

self.approval_duration))

1522

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

1523

* 1000)

1190

1524

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

1191

1525

1192

1526

# Name - property

1200

1534

return dbus.String(self.fingerprint)

1201

1535

1202

1536

# Host - property

1203

@dbus_service_property(_interface, signature="s",

1537

@dbus_service_property(_interface,

1538

signature="s",

1204

1539

access="readwrite")

1205

1540

def Host_dbus_property(self, value=None):

1206

1541

if value is None: # get

1207

1542

return dbus.String(self.host)

1208

self.host = value

1543

self.host = str(value)

1209

1544

1210

1545

# Created - property

1211

1546

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

1212

1547

def Created_dbus_property(self):

1213

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

1548

return datetime_to_dbus(self.created)

1214

1549

1215

1550

# LastEnabled - property

1216

1551

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

1218

1553

return datetime_to_dbus(self.last_enabled)

1219

1554

1220

1555

# Enabled - property

1221

@dbus_service_property(_interface, signature="b",

1556

@dbus_service_property(_interface,

1557

signature="b",

1222

1558

access="readwrite")

1223

1559

def Enabled_dbus_property(self, value=None):

1224

1560

if value is None: # get

1229

1565

self.disable()

1230

1566

1231

1567

# LastCheckedOK - property

1232

@dbus_service_property(_interface, signature="s",

1568

@dbus_service_property(_interface,

1569

signature="s",

1233

1570

access="readwrite")

1234

1571

def LastCheckedOK_dbus_property(self, value=None):

1235

1572

if value is not None:

1237

1574

return

1238

1575

return datetime_to_dbus(self.last_checked_ok)

1239

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

1240

1582

# Expires - property

1241

1583

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

1242

1584

def Expires_dbus_property(self):

1248

1590

return datetime_to_dbus(self.last_approval_request)

1249

1591

1250

1592

# Timeout - property

1251

@dbus_service_property(_interface, signature="t",

1593

@dbus_service_property(_interface,

1594

signature="t",

1252

1595

access="readwrite")

1253

1596

def Timeout_dbus_property(self, value=None):

1254

1597

if value is None: # get

1255

return dbus.UInt64(self.timeout_milliseconds())

1598

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

1599

old_timeout = self.timeout

1256

1600

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

1257

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

1258

return

1259

# Reschedule timeout

1260

gobject.source_remove(self.disable_initiator_tag)

1261

self.disable_initiator_tag = None

1262

self.expires = None

1263

time_to_die = _timedelta_to_milliseconds((self

1264

.last_checked_ok

1265

+ self.timeout)

1266

- datetime.datetime

1267

.utcnow())

1268

if time_to_die <= 0:

1269

# The timeout has passed

1270

self.disable()

1271

else:

1272

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

1273

+ datetime.timedelta(milliseconds =

1274

time_to_die))

1275

self.disable_initiator_tag = (gobject.timeout_add

1276

(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)

1277

1616

1278

1617

# ExtendedTimeout - property

1279

@dbus_service_property(_interface, signature="t",

1618

@dbus_service_property(_interface,

1619

signature="t",

1280

1620

access="readwrite")

1281

1621

def ExtendedTimeout_dbus_property(self, value=None):

1282

1622

if value is None: # get

1283

return dbus.UInt64(self.extended_timeout_milliseconds())

1623

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

1624

* 1000)

1284

1625

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

1285

1626

1286

1627

# Interval - property

1287

@dbus_service_property(_interface, signature="t",

1628

@dbus_service_property(_interface,

1629

signature="t",

1288

1630

access="readwrite")

1289

1631

def Interval_dbus_property(self, value=None):

1290

1632

if value is None: # get

1291

return dbus.UInt64(self.interval_milliseconds())

1633

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

1292

1634

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

1293

1635

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

1294

1636

return

1295

# Reschedule checker run

1296

gobject.source_remove(self.checker_initiator_tag)

1297

self.checker_initiator_tag = (gobject.timeout_add

1298

(value, self.start_checker))

1299

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

1300

1643

1301

1644

# Checker - property

1302

@dbus_service_property(_interface, signature="s",

1645

@dbus_service_property(_interface,

1646

signature="s",

1303

1647

access="readwrite")

1304

1648

def Checker_dbus_property(self, value=None):

1305

1649

if value is None: # get

1306

1650

return dbus.String(self.checker_command)

1307

self.checker_command = value

1651

self.checker_command = str(value)

1308

1652

1309

1653

# CheckerRunning - property

1310

@dbus_service_property(_interface, signature="b",

1654

@dbus_service_property(_interface,

1655

signature="b",

1311

1656

access="readwrite")

1312

1657

def CheckerRunning_dbus_property(self, value=None):

1313

1658

if value is None: # get

1323

1668

return self.dbus_object_path # is already a dbus.ObjectPath

1324

1669

1325

1670

# Secret = property

1326

@dbus_service_property(_interface, signature="ay",

1327

access="write", byte_arrays=True)

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1328

1675

def Secret_dbus_property(self, value):

1329

self.secret = str(value)

1676

self.secret = bytes(value)

1330

1677

1331

1678

del _interface

1332

1679

1336

1683

self._pipe = child_pipe

1337

1684

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

1338

1685

if not self._pipe.recv():

1339

raise KeyError()

1686

raise KeyError(fpr)

1340

1687

1341

1688

def __getattribute__(self, name):

1342

if(name == '_pipe'):

1689

if name == '_pipe':

1343

1690

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

1344

1691

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

1345

1692

data = self._pipe.recv()

1346

1693

if data[0] == 'data':

1347

1694

return data[1]

1348

1695

if data[0] == 'function':

1696

1349

1697

def func(*args, **kwargs):

1350

1698

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

1351

1699

return self._pipe.recv()[1]

1700

1352

1701

return func

1353

1702

1354

1703

def __setattr__(self, name, value):

1355

if(name == '_pipe'):

1704

if name == '_pipe':

1356

1705

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

1357

1706

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

1358

1707

1359

class ClientDBusTransitional(ClientDBus):

1360

__metaclass__ = AlternateDBusNamesMetaclass

1361

1708

1362

1709

class ClientHandler(socketserver.BaseRequestHandler, object):

1363

1710

"""A class to handle client connections.

1368

1715

def handle(self):

1369

1716

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

1370

1717

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

1371

unicode(self.client_address))

1718

str(self.client_address))

1372

1719

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

1373

1720

self.server.child_pipe.fileno())

1374

1721

1375

session = (gnutls.connection

1376

.ClientSession(self.request,

1377

gnutls.connection

1378

.X509Credentials()))

1722

session = gnutls.connection.ClientSession(

1723

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

1379

1724

1380

1725

# Note: gnutls.connection.X509Credentials is really a

1381

1726

# generic GnuTLS certificate credentials object so long as

1390

1735

priority = self.server.gnutls_priority

1391

1736

if priority is None:

1392

1737

priority = "NORMAL"

1393

(gnutls.library.functions

1394

.gnutls_priority_set_direct(session._c_object,

1395

priority, None))

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1396

1740

1397

1741

# Start communication using the Mandos protocol

1398

1742

# Get protocol number

1400

1744

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

1401

1745

try:

1402

1746

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

1403

raise RuntimeError

1747

raise RuntimeError(line)

1404

1748

except (ValueError, IndexError, RuntimeError) as error:

1405

1749

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

1406

1750

return

1418

1762

approval_required = False

1419

1763

try:

1420

1764

try:

1421

fpr = self.fingerprint(self.peer_certificate

1422

(session))

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1423

1767

except (TypeError,

1424

1768

gnutls.errors.GNUTLSError) as error:

1425

1769

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

1440

1784

while True:

1441

1785

if not client.enabled:

1442

1786

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

1443

client.name)

1787

client.name)

1444

1788

if self.server.use_dbus:

1445

1789

# Emit D-Bus signal

1446

1790

client.Rejected("Disabled")

1447

1791

return

1448

1792

1449

if client._approved or not client.approval_delay:

1793

if client.approved or not client.approval_delay:

1450

1794

#We are approved or approval is disabled

1451

1795

break

1452

elif client._approved is None:

1796

elif client.approved is None:

1453

1797

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

1454

1798

client.name)

1455

1799

if self.server.use_dbus:

1456

1800

# Emit D-Bus signal

1457

1801

client.NeedApproval(

1458

client.approval_delay_milliseconds(),

1459

client.approved_by_default)

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1460

1804

else:

1461

1805

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

1462

1806

client.name)

1468

1812

#wait until timeout or approved

1469

1813

time = datetime.datetime.now()

1470

1814

client.changedstate.acquire()

1471

(client.changedstate.wait

1472

(float(client._timedelta_to_milliseconds(delay)

1473

/ 1000)))

1815

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

1474

1816

client.changedstate.release()

1475

1817

time2 = datetime.datetime.now()

1476

1818

if (time2 - time) >= delay:

1492

1834

try:

1493

1835

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

1494

1836

except gnutls.errors.GNUTLSError as error:

1495

logger.warning("gnutls send failed")

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1496

1839

return

1497

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

1498

sent, len(client.secret)

1499

- (sent_size + sent))

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1500

1843

sent_size += sent

1501

1844

1502

1845

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

1503

1846

# bump the timeout using extended_timeout

1504

client.checked_ok(client.extended_timeout)

1847

client.bump_timeout(client.extended_timeout)

1505

1848

if self.server.use_dbus:

1506

1849

# Emit D-Bus signal

1507

1850

client.GotSecret()

1512

1855

try:

1513

1856

session.bye()

1514

1857

except gnutls.errors.GNUTLSError as error:

1515

logger.warning("GnuTLS bye failed")

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1516

1860

1517

1861

@staticmethod

1518

1862

def peer_certificate(session):

1519

1863

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

1520

1864

# If not an OpenPGP certificate...

1521

if (gnutls.library.functions

1522

.gnutls_certificate_type_get(session._c_object)

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1523

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1524

1868

# ...do the normal thing

1525

1869

return session.peer_certificate

1539

1883

def fingerprint(openpgp):

1540

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1541

1885

# New GnuTLS "datum" with the OpenPGP public key

1542

datum = (gnutls.library.types

1543

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

1544

ctypes.POINTER

1545

(ctypes.c_ubyte)),

1546

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)))

1547

1890

# New empty GnuTLS certificate

1548

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1549

(gnutls.library.functions

1550

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1551

1894

# Import the OpenPGP public key into the certificate

1552

(gnutls.library.functions

1553

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

1554

gnutls.library.constants

1555

.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)

1556

1898

# Verify the self signature in the key

1557

1899

crtverify = ctypes.c_uint()

1558

(gnutls.library.functions

1559

.gnutls_openpgp_crt_verify_self(crt, 0,

1560

ctypes.byref(crtverify)))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1561

1902

if crtverify.value != 0:

1562

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1563

raise (gnutls.errors.CertificateSecurityError

1564

("Verify failed"))

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1565

1906

# New buffer for the fingerprint

1566

1907

buf = ctypes.create_string_buffer(20)

1567

1908

buf_len = ctypes.c_size_t()

1568

1909

# Get the fingerprint from the certificate into the buffer

1569

(gnutls.library.functions

1570

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

1571

ctypes.byref(buf_len)))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1572

1912

# Deinit the certificate

1573

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1574

1914

# Convert the buffer to a Python bytestring

1575

1915

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

1576

1916

# Convert the bytestring to hexadecimal notation

1577

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

1917

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

1578

1918

return hex_fpr

1579

1919

1580

1920

1581

1921

class MultiprocessingMixIn(object):

1582

1922

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

1923

1583

1924

def sub_process_main(self, request, address):

1584

1925

try:

1585

1926

self.finish_request(request, address)

1586

except:

1927

except Exception:

1587

1928

self.handle_error(request, address)

1588

1929

self.close_request(request)

1589

1930

1590

1931

def process_request(self, request, address):

1591

1932

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

1592

1933

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

1593

args = (request,

1594

address))

1934

args = (request, address))

1595

1935

proc.start()

1596

1936

return proc

1597

1937

1598

1938

1599

1939

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1600

1940

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

1941

1601

1942

def process_request(self, request, client_address):

1602

1943

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

1603

1944

1612

1953

1613

1954

def add_pipe(self, parent_pipe, proc):

1614

1955

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

1615

raise NotImplementedError

1956

raise NotImplementedError()

1616

1957

1617

1958

1618

1959

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1624

1965

interface: None or a network interface name (string)

1625

1966

use_ipv6: Boolean; to use IPv6 or not

1626

1967

"""

1968

1627

1969

def __init__(self, server_address, RequestHandlerClass,

1628

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

"""

1629

1976

self.interface = interface

1630

1977

if use_ipv6:

1631

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.

1632

2005

socketserver.TCPServer.__init__(self, server_address,

1633

2006

RequestHandlerClass)

2007

1634

2008

def server_bind(self):

1635

2009

"""This overrides the normal server_bind() function

1636

2010

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

1642

2016

self.interface)

1643

2017

else:

1644

2018

try:

1645

self.socket.setsockopt(socket.SOL_SOCKET,

1646

SO_BINDTODEVICE,

1647

str(self.interface

1648

+ '\0'))

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1649

2022

except socket.error as error:

1650

if error[0] == errno.EPERM:

1651

logger.error("No permission to"

1652

" bind to interface %s",

1653

self.interface)

1654

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:

1655

2027

logger.error("SO_BINDTODEVICE not available;"

1656

2028

" cannot bind to interface %s",

1657

2029

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

1658

2033

else:

1659

2034

raise

1660

2035

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

1663

2038

if self.address_family == socket.AF_INET6:

1664

2039

any_address = "::" # in6addr_any

1665

2040

else:

1666

any_address = socket.INADDR_ANY

2041

any_address = "0.0.0.0" # INADDR_ANY

1667

2042

self.server_address = (any_address,

1668

2043

self.server_address[1])

1669

2044

elif not self.server_address[1]:

1670

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

1671

0)

2045

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

1672

2046

# if self.interface:

1673

2047

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

1674

2048

# 0, # port

1688

2062

1689

2063

Assumes a gobject.MainLoop event loop.

1690

2064

"""

2065

1691

2066

def __init__(self, server_address, RequestHandlerClass,

1692

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

1693

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):

1694

2073

self.enabled = False

1695

2074

self.clients = clients

1696

2075

if self.clients is None:

1700

2079

IPv6_TCPServer.__init__(self, server_address,

1701

2080

RequestHandlerClass,

1702

2081

interface = interface,

1703

use_ipv6 = use_ipv6)

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1704

2085

def server_activate(self):

1705

2086

if self.enabled:

1706

2087

return socketserver.TCPServer.server_activate(self)

1710

2091

1711

2092

def add_pipe(self, parent_pipe, proc):

1712

2093

# Call "handle_ipc" for both data and EOF events

1713

gobject.io_add_watch(parent_pipe.fileno(),

1714

gobject.IO_IN | gobject.IO_HUP,

1715

functools.partial(self.handle_ipc,

1716

parent_pipe =

1717

parent_pipe,

1718

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))

1719

2100

1720

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

1721

proc = None, client_object=None):

1722

condition_names = {

1723

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

1724

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

1725

# blocking).

1726

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

1727

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

1728

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

1729

# broken, usually for pipes and

1730

# sockets).

1731

}

1732

conditions_string = ' | '.join(name

1733

for cond, name in

1734

condition_names.iteritems()

1735

if cond & condition)

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

1736

2105

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

1737

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

2106

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

1738

2107

# Wait for other process to exit

1739

2108

proc.join()

1740

2109

return False

1761

2130

parent_pipe.send(False)

1762

2131

return False

1763

2132

1764

gobject.io_add_watch(parent_pipe.fileno(),

1765

gobject.IO_IN | gobject.IO_HUP,

1766

functools.partial(self.handle_ipc,

1767

parent_pipe =

1768

parent_pipe,

1769

proc = proc,

1770

client_object =

1771

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))

1772

2140

parent_pipe.send(True)

1773

2141

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

1774

2142

# same fileno

1780

2148

1781

2149

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

1782

2150

funcname)(*args,

1783

**kwargs)))

2151

**kwargs)))

1784

2152

1785

2153

if command == 'getattr':

1786

2154

attrname = request[1]

1787

if callable(client_object.__getattribute__(attrname)):

1788

parent_pipe.send(('function',))

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1789

2158

else:

1790

parent_pipe.send(('data', client_object

1791

.__getattribute__(attrname)))

2159

parent_pipe.send((

2160

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

1792

2161

1793

2162

if command == 'setattr':

1794

2163

attrname = request[1]

1798

2167

return True

1799

2168

1800

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

1801

2266

def string_to_delta(interval):

1802

2267

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

1803

2268

1814

2279

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

1815

2280

datetime.timedelta(0, 330)

1816

2281

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

1817

2288

timevalue = datetime.timedelta(0)

1818

2289

for s in interval.split():

1819

2290

try:

1820

suffix = unicode(s[-1])

2291

suffix = s[-1]

1821

2292

value = int(s[:-1])

1822

2293

if suffix == "d":

1823

2294

delta = datetime.timedelta(value)

1830

2301

elif suffix == "w":

1831

2302

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

1832

2303

else:

1833

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

1834

except (ValueError, IndexError) as e:

2304

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

2305

except IndexError as e:

1835

2306

raise ValueError(*(e.args))

1836

2307

timevalue += delta

1837

2308

return timevalue

1838

2309

1839

2310

1840

def if_nametoindex(interface):

1841

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

1842

1843

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

1844

global if_nametoindex

1845

try:

1846

if_nametoindex = (ctypes.cdll.LoadLibrary

1847

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

1848

.if_nametoindex)

1849

except (OSError, AttributeError):

1850

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

1851

def if_nametoindex(interface):

1852

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

1853

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

1854

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

1855

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1856

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

1857

interface))

1858

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

1859

ifreq[16:20])[0]

1860

return interface_index

1861

return if_nametoindex(interface)

1862

1863

1864

2311

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

1865

2312

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

1866

2313

1874

2321

sys.exit()

1875

2322

if not noclose:

1876

2323

# Close all standard open file descriptors

1877

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

2324

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

1878

2325

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

1879

2326

raise OSError(errno.ENODEV,

1880

"%s not a character device"

1881

% os.path.devnull)

2327

"{} not a character device"

2328

.format(os.devnull))

1882

2329

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

1883

2330

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

1884

2331

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

1893

2340

1894

2341

parser = argparse.ArgumentParser()

1895

2342

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

1896

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

2343

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

1897

2344

help="show version number and exit")

1898

2345

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

1899

2346

help="Bind to interface IF")

1905

2352

help="Run self-test")

1906

2353

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

1907

2354

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

1908

" to terminal")

2355

" to terminal", default=None)

1909

2356

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

1910

2357

help="Debug level for stdout output")

1911

2358

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

1918

2365

" files")

1919

2366

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

1920

2367

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

1921

" system bus interface")

2368

" system bus interface", default=None)

1922

2369

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

1923

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

2370

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

2371

default=None)

1924

2372

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

1925

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

1926

default=True)

1927

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

1928

2386

options = parser.parse_args()

1929

2387

1930

2388

if options.check:

1931

2389

import doctest

1932

doctest.testmod()

1933

sys.exit()

2390

fail_count, test_count = doctest.testmod()

2391

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

1934

2392

1935

2393

# Default values for config file for server-global settings

1936

2394

server_defaults = { "interface": "",

1938

2396

"port": "",

1939

2397

"debug": "False",

1940

2398

"priority":

1941

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

2399

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

2400

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

1942

2401

"servicename": "Mandos",

1943

2402

"use_dbus": "True",

1944

2403

"use_ipv6": "True",

1945

2404

"debuglevel": "",

1946

}

2405

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

1947

2411

1948

2412

# Parse config file for server-global settings

1949

2413

server_config = configparser.SafeConfigParser(server_defaults)

1950

2414

del server_defaults

1951

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

1952

"mandos.conf"))

2415

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

1953

2416

# Convert the SafeConfigParser object to a dict

1954

2417

server_settings = server_config.defaults()

1955

2418

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

1956

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

2419

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

1957

2420

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

1958

2421

option)

1959

2422

if server_settings["port"]:

1960

2423

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

1961

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"])

1962

2434

del server_config

1963

2435

1964

2436

# Override the settings from the config file with command line

1965

2437

# options, if set.

1966

2438

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

1967

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

1968

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

2439

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

2440

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

2441

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

1969

2442

value = getattr(options, option)

1970

2443

if value is not None:

1971

2444

server_settings[option] = value

1972

2445

del options

1973

2446

# Force all strings to be unicode

1974

2447

for option in server_settings.keys():

1975

if type(server_settings[option]) is str:

1976

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

1977

2458

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

1978

2459

1979

2460

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

1980

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

1981

2467

# For convenience

1982

2468

debug = server_settings["debug"]

1983

2469

debuglevel = server_settings["debuglevel"]

1984

2470

use_dbus = server_settings["use_dbus"]

1985

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)

1986

2485

1987

2486

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

1988

syslogger.setFormatter(logging.Formatter

1989

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

1990

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

1991

% server_settings["servicename"]))

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

1992

2491

1993

2492

# Parse config file with clients

1994

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

1995

"extended_timeout": "15m",

1996

"interval": "2m",

1997

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

1998

"host": "",

1999

"approval_delay": "0s",

2000

"approval_duration": "1s",

2001

}

2002

client_config = configparser.SafeConfigParser(client_defaults)

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

2003

2495

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

2004

2496

"clients.conf"))

2005

2497

2006

2498

global mandos_dbus_service

2007

2499

mandos_dbus_service = None

2008

2500

2009

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

2010

server_settings["port"]),

2011

ClientHandler,

2012

interface=(server_settings["interface"]

2013

or None),

2014

use_ipv6=use_ipv6,

2015

gnutls_priority=

2016

server_settings["priority"],

2017

use_dbus=use_dbus)

2018

if not debug:

2019

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

2020

2517

try:

2021

pidfile = open(pidfilename, "w")

2022

except IOError:

2023

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)

2024

2522

2025

try:

2026

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

2027

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

2028

except KeyError:

2523

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

2029

2524

try:

2030

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

2031

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

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

2032

2528

except KeyError:

2033

try:

2034

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

2035

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

2036

except KeyError:

2037

uid = 65534

2038

gid = 65534

2529

continue

2530

else:

2531

uid = 65534

2532

gid = 65534

2039

2533

try:

2040

2534

os.setgid(gid)

2041

2535

os.setuid(uid)

2042

2536

except OSError as error:

2043

if error[0] != errno.EPERM:

2044

raise error

2045

2046

if not debug and not debuglevel:

2047

logger.setLevel(logging.WARNING)

2048

if debuglevel:

2049

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

2050

logger.setLevel(level)

2537

if error.errno != errno.EPERM:

2538

raise

2051

2539

2052

2540

if debug:

2053

logger.setLevel(logging.DEBUG)

2054

2541

# Enable all possible GnuTLS debugging

2055

2542

2056

2543

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

2061

2548

def debug_gnutls(level, string):

2062

2549

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

2063

2550

2064

(gnutls.library.functions

2065

.gnutls_global_set_log_function(debug_gnutls))

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2066

2553

2067

2554

# Redirect stdin so all checkers get /dev/null

2068

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

2555

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

2069

2556

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

2070

2557

if null > 2:

2071

2558

os.close(null)

2072

else:

2073

# No console logging

2074

logger.removeHandler(console)

2075

2559

2076

2560

# Need to fork before connecting to D-Bus

2077

if not debug:

2561

if not foreground:

2078

2562

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

2079

2563

daemon()

2080

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

2081

2569

global main_loop

2082

2570

# From the Avahi example code

2083

DBusGMainLoop(set_as_default=True )

2571

DBusGMainLoop(set_as_default=True)

2084

2572

main_loop = gobject.MainLoop()

2085

2573

bus = dbus.SystemBus()

2086

2574

# End of Avahi example code

2087

2575

if use_dbus:

2088

2576

try:

2089

2577

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

2090

bus, do_not_queue=True)

2091

old_bus_name = (dbus.service.BusName

2092

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

2093

do_not_queue=True))

2094

except dbus.exceptions.NameExistsException as e:

2095

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)

2096

2585

use_dbus = False

2097

2586

server_settings["use_dbus"] = False

2098

2587

tcp_server.use_dbus = False

2099

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2100

service = AvahiServiceToSyslog(name =

2101

server_settings["servicename"],

2102

servicetype = "_mandos._tcp",

2103

protocol = protocol, bus = bus)

2104

if server_settings["interface"]:

2105

service.interface = (if_nametoindex

2106

(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"))

2107

2598

2108

2599

global multiprocessing_manager

2109

2600

multiprocessing_manager = multiprocessing.Manager()

2110

2601

2111

2602

client_class = Client

2112

2603

if use_dbus:

2113

client_class = functools.partial(ClientDBusTransitional,

2114

bus = bus)

2115

2116

special_settings = {

2117

# Some settings need to be accessd by special methods;

2118

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

2119

"approved_by_default":

2120

lambda section:

2121

client_config.getboolean(section, "approved_by_default"),

2122

}

2123

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

2124

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

2125

# with exceptions for any special settings as defined above

2126

client_settings = dict((clientname,

2127

dict((setting,

2128

(value if setting not in special_settings

2129

else special_settings[setting](clientname)))

2130

for setting, value in client_config.items(clientname)))

2131

for clientname in client_config.sections())

2132

2604

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

2605

2606

client_settings = Client.config_parser(client_config)

2133

2607

old_client_settings = {}

2134

clients_data = []

2135

2136

# 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.

2137

2619

if server_settings["restore"]:

2138

2620

try:

2139

2621

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

2140

clients_data, old_client_settings = pickle.load(stored_state)

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2141

2624

os.remove(stored_state_path)

2142

2625

except IOError as e:

2143

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

2144

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)

2145

2632

raise

2146

2147

for client in clients_data:

2148

client_name = client["name"]

2149

2150

# Decide which value to use after restoring saved state.

2151

# We have three different values: Old config file,

2152

# new config file, and saved state.

2153

# New config value takes precedence if it differs from old

2154

# config value, otherwise use saved state.

2155

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))

2156

2689

try:

2157

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

2158

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

2159

# attribute)

2160

if name != "secret" and value != old_client_settings[client_name][name]:

2161

setattr(client, name, value)

2162

except KeyError:

2163

pass

2164

2165

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

2166

# last checker was sucessful. Clients who checkers failed before we

2167

# stored it state is asumed to had failed checker during downtime.

2168

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

2169

if ((datetime.datetime.utcnow() - client["last_checked_ok"])

2170

> client["interval"]):

2171

if client["last_checker_status"] != 0:

2172

client["enabled"] = False

2173

else:

2174

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

2175

2176

client["changedstate"] = (multiprocessing_manager

2177

.Condition(multiprocessing_manager

2178

.Lock()))

2179

if use_dbus:

2180

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2181

tcp_server.clients[client_name] = new_client

2182

new_client.bus = bus

2183

for name, value in client.iteritems():

2184

setattr(new_client, name, value)

2185

client_object_name = unicode(client_name).translate(

2186

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

2187

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

2188

new_client.dbus_object_path = (dbus.ObjectPath

2189

("/clients/" + client_object_name))

2190

DBusObjectWithProperties.__init__(new_client,

2191

new_client.bus,

2192

new_client.dbus_object_path)

2193

else:

2194

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

2195

for name, value in client.iteritems():

2196

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

2197

2198

tcp_server.clients[client_name].decrypt_secret(

2199

client_settings[client_name]["secret"])

2200

2201

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

2202

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

2203

del tcp_server.clients[clientname]

2204

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

2205

tcp_server.clients[clientname] = (client_class(name = clientname,

2206

config =

2207

client_settings

2208

[clientname]))

2209

2210

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2693

except PGPError:

2694

# If decryption fails, we use secret from new settings

2695

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

2696

client_name))

2697

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

2698

["secret"])

2699

2700

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

2701

for client_name in (set(old_client_settings)

2702

- set(client_settings)):

2703

del clients_data[client_name]

2704

for client_name in (set(client_settings)

2705

- set(old_client_settings)):

2706

clients_data[client_name] = client_settings[client_name]

2707

2708

# Create all client objects

2709

for client_name, client in clients_data.items():

2710

tcp_server.clients[client_name] = client_class(

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2714

2211

2715

if not tcp_server.clients:

2212

2716

logger.warning("No clients defined")

2213

2214

if not debug:

2215

try:

2216

with pidfile:

2217

pid = os.getpid()

2218

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

2219

del pidfile

2220

except IOError:

2221

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

2222

pidfilename, pid)

2223

except NameError:

2224

# "pidfile" was never created

2225

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

2226

2728

del pidfilename

2227

2228

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

2229

2729

2230

2730

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

2231

2731

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

2232

2732

2233

2733

if use_dbus:

2234

class MandosDBusService(dbus.service.Object):

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2235

2738

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

2739

2236

2740

def __init__(self):

2237

2741

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

2742

2238

2743

_interface = "se.recompile.Mandos"

2239

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2240

2751

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

2241

2752

def ClientAdded(self, objpath):

2242

2753

"D-Bus signal"

2255

2766

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

2256

2767

def GetAllClients(self):

2257

2768

"D-Bus method"

2258

return dbus.Array(c.dbus_object_path

2259

for c in

2769

return dbus.Array(c.dbus_object_path for c in

2260

2770

tcp_server.clients.itervalues())

2261

2771

2262

2772

@dbus.service.method(_interface,

2264

2774

def GetAllClientsWithProperties(self):

2265

2775

"D-Bus method"

2266

2776

return dbus.Dictionary(

2267

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

2268

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

2777

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

2778

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

2269

2779

signature="oa{sv}")

2270

2780

2271

2781

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

2284

2794

2285

2795

del _interface

2286

2796

2287

class MandosDBusServiceTransitional(MandosDBusService):

2288

__metaclass__ = AlternateDBusNamesMetaclass

2289

mandos_dbus_service = MandosDBusServiceTransitional()

2797

mandos_dbus_service = MandosDBusService()

2290

2798

2291

2799

def cleanup():

2292

2800

"Cleanup function; run on exit"

2293

service.cleanup()

2801

if zeroconf:

2802

service.cleanup()

2294

2803

2295

2804

multiprocessing.active_children()

2805

wnull.close()

2296

2806

if not (tcp_server.clients or client_settings):

2297

2807

return

2298

2299

# Store client before exiting. Secrets are encrypted with key based

2300

# on what config file has. If config file is removed/edited, old

2301

# secret will thus be unrecovable.

2302

clients = []

2303

for client in tcp_server.clients.itervalues():

2304

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

2305

2306

client_dict = {}

2307

2308

# A list of attributes that will not be stored when shuting down.

2309

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

2310

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

2311

exclude.add(name)

2312

2313

client_dict["encrypted_secret"] = client.encrypted_secret

2314

for attr in client.client_structure:

2315

if attr not in exclude:

2316

client_dict[attr] = getattr(client, attr)

2317

2318

clients.append(client_dict)

2319

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

2320

2808

2809

# Store client before exiting. Secrets are encrypted with key

2810

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

2811

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

2812

clients = {}

2813

with PGPEngine() as pgp:

2814

for client in tcp_server.clients.itervalues():

2815

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

2816

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

2817

key)

2818

client_dict = {}

2819

2820

# A list of attributes that can not be pickled

2821

# + secret.

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2826

exclude.add(name)

2827

2828

client_dict["encrypted_secret"] = (client

2829

.encrypted_secret)

2830

for attr in client.client_structure:

2831

if attr not in exclude:

2832

client_dict[attr] = getattr(client, attr)

2833

2834

clients[client.name] = client_dict

2835

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

2836

2321

2837

try:

2322

with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "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:

2323

2844

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

2324

except IOError as e:

2325

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

2326

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)

2327

2859

raise

2328

2860

2329

2861

# Delete all clients, and settings from config

2330

2862

while tcp_server.clients:

2331

2863

name, client = tcp_server.clients.popitem()

2335

2867

client.disable(quiet=True)

2336

2868

if use_dbus:

2337

2869

# Emit D-Bus signal

2338

mandos_dbus_service.ClientRemoved(client

2339

.dbus_object_path,

2340

client.name)

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2341

2872

client_settings.clear()

2342

2873

2343

2874

atexit.register(cleanup)

2349

2880

# Need to initiate checking of clients

2350

2881

if client.enabled:

2351

2882

client.init_checker()

2352

2353

2883

2354

2884

tcp_server.enable()

2355

2885

tcp_server.server_activate()

2356

2886

2357

2887

# Find out what port we got

2358

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

2888

if zeroconf:

2889

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

2359

2890

if use_ipv6:

2360

2891

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

2361

" flowinfo %d, scope_id %d"

2362

% tcp_server.socket.getsockname())

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2363

2894

else: # IPv4

2364

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

2365

% tcp_server.socket.getsockname())

2895

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

2896

*tcp_server.socket.getsockname())

2366

2897

2367

2898

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

2368

2899

2369

2900

try:

2370

# From the Avahi example code

2371

try:

2372

service.activate()

2373

except dbus.exceptions.DBusException as error:

2374

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

2375

cleanup()

2376

sys.exit(1)

2377

# 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

2378

2910

2379

2911

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

2380

2912

lambda *args, **kwargs:

2384

2916

logger.debug("Starting main loop")

2385

2917

main_loop.run()

2386

2918

except AvahiError as error:

2387

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

2919

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

2388

2920

cleanup()

2389

2921

sys.exit(1)

2390

2922

except KeyboardInterrupt: