/mandos/trunk : revision 778

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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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version = "1.4.1"

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

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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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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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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str(error))

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

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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383

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

239

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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

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self.cleanup()

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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:

407

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

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self.cleanup()

409

os._exit(1)

255

410

else:

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411

if error is None:

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

258

413

else:

259

414

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

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def activate(self):

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

262

418

if self.server is None:

266

422

follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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424

self.server.connect_to_signal("StateChanged",

269

self.server_state_changed)

425

self.server_state_changed)

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

271

427

272

428

273

def _timedelta_to_milliseconds(td):

274

"Convert a datetime.timedelta() to milliseconds"

275

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

276

+ (td.seconds * 1000)

277

+ (td.microseconds // 1000))

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429

class AvahiServiceToSyslog(AvahiService):

430

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

431

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

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

436

return ret

437

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

447

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448

class Client(object):

280

449

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

281

450

282

451

Attributes:

283

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

452

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

284

453

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

285

454

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

286

455

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

304

473

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

305

474

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

306

475

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

307

Last_checker_status: integer between 0 and 255 reflecting exit status

308

of last checker. -1 reflect crashed checker.

309

last_enabled: datetime.datetime(); (UTC)

476

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

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

310

482

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

311

483

D-Bus identifiers

312

484

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

313

485

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

314

486

until this client is disabled

315

extended_timeout: extra long timeout when password has been sent

487

extended_timeout: extra long timeout when secret has been sent

316

488

runtime_expansions: Allowed attributes for runtime expansion.

317

489

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

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490

disabled, or None

491

server_settings: The server_settings dict from main()

319

492

"""

320

493

321

494

runtime_expansions = ("approval_delay", "approval_duration",

322

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

323

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

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

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

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"last_approval_request", "last_checked_ok",

324

498

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

325

326

def timeout_milliseconds(self):

327

"Return the 'timeout' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.timeout)

329

330

def extended_timeout_milliseconds(self):

331

"Return the 'extended_timeout' attribute in milliseconds"

332

return _timedelta_to_milliseconds(self.extended_timeout)

333

334

def interval_milliseconds(self):

335

"Return the 'interval' attribute in milliseconds"

336

return _timedelta_to_milliseconds(self.interval)

337

338

def approval_delay_milliseconds(self):

339

return _timedelta_to_milliseconds(self.approval_delay)

340

341

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

342

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

343

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

344

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):

345

562

self.name = name

346

if config is None:

347

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

348

580

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

349

# Uppercase and remove spaces from fingerprint for later

350

# comparison purposes with return value from the fingerprint()

351

# function

352

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

353

.replace(" ", ""))

354

581

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

355

if "secret" in config:

356

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

357

elif "secfile" in config:

358

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

359

(config["secfile"])),

360

"rb") as secfile:

361

self.secret = secfile.read()

362

else:

363

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

364

% self.name)

365

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

366

self.created = datetime.datetime.utcnow()

367

self.enabled = True

368

self.last_approval_request = None

369

self.last_enabled = datetime.datetime.utcnow()

370

self.last_checked_ok = None

371

self.last_checker_status = 0

372

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

373

self.extended_timeout = string_to_delta(config

374

["extended_timeout"])

375

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

376

586

self.checker = None

377

587

self.checker_initiator_tag = None

378

588

self.disable_initiator_tag = None

379

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

380

589

self.checker_callback_tag = None

381

self.checker_command = config["checker"]

382

590

self.current_checker_command = None

383

self._approved = None

384

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

385

True)

591

self.approved = None

386

592

self.approvals_pending = 0

387

self.approval_delay = string_to_delta(

388

config["approval_delay"])

389

self.approval_duration = string_to_delta(

390

config["approval_duration"])

391

self.changedstate = (multiprocessing_manager

392

.Condition(multiprocessing_manager

393

.Lock()))

394

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("_")]

395

598

self.client_structure.append("client_structure")

396

397

398

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

399

lambda obj: isinstance(obj, property)):

599

600

for name, t in inspect.getmembers(

601

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

400

602

if not name.startswith("_"):

401

603

self.client_structure.append(name)

402

604

403

605

# Send notice to process children that client state has changed

404

606

def send_changedstate(self):

405

self.changedstate.acquire()

406

self.changedstate.notify_all()

407

self.changedstate.release()

607

with self.changedstate:

608

self.changedstate.notify_all()

408

609

409

610

def enable(self):

410

611

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

411

612

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

412

613

# Already enabled

413

614

return

414

self.send_changedstate()

415

615

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

416

616

self.enabled = True

417

617

self.last_enabled = datetime.datetime.utcnow()

418

618

self.init_checker()

619

self.send_changedstate()

419

620

420

621

def disable(self, quiet=True):

421

622

"""Disable this client."""

422

623

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

423

624

return False

424

625

if not quiet:

425

self.send_changedstate()

426

if not quiet:

427

626

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

428

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

627

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

429

628

gobject.source_remove(self.disable_initiator_tag)

430

629

self.disable_initiator_tag = None

431

630

self.expires = None

432

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

631

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

433

632

gobject.source_remove(self.checker_initiator_tag)

434

633

self.checker_initiator_tag = None

435

634

self.stop_checker()

436

635

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

437

638

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

438

639

return False

439

640

440

641

def __del__(self):

441

642

self.disable()

442

643

443

644

def init_checker(self):

444

645

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

445

646

# and every interval from then on.

446

self.checker_initiator_tag = (gobject.timeout_add

447

(self.interval_milliseconds(),

448

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)

449

652

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

450

self.disable_initiator_tag = (gobject.timeout_add

451

(self.timeout_milliseconds(),

452

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)

453

657

# Also start a new checker *right now*.

454

658

self.start_checker()

455

456

457

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

659

660

def checker_callback(self, source, condition, connection,

661

command):

458

662

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

459

663

self.checker_callback_tag = None

460

664

self.checker = None

461

if os.WIFEXITED(condition):

462

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

463

672

if self.last_checker_status == 0:

464

673

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

465

674

vars(self))

466

675

self.checked_ok()

467

676

else:

468

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

469

vars(self))

677

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

470

678

else:

471

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

472

681

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

473

682

vars(self))

474

475

def checked_ok(self, timeout=None):

476

"""Bump up the timeout for this client.

477

478

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

479

alive and well.

480

"""

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."""

481

694

if timeout is None:

482

695

timeout = self.timeout

483

self.last_checked_ok = datetime.datetime.utcnow()

484

696

if self.disable_initiator_tag is not None:

485

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

486

699

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

487

self.disable_initiator_tag = (gobject.timeout_add

488

(_timedelta_to_milliseconds

489

(timeout), self.disable))

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

490

702

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

491

703

492

704

def need_approval(self):

498

710

If a checker already exists, leave it running and do

499

711

nothing."""

500

712

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

501

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

502

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

503

# client would inevitably timeout, since no checker would get

504

# 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

505

717

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

506

718

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

507

719

# should be.

508

720

509

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

510

try:

511

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

512

except (AttributeError, OSError) as error:

513

if (isinstance(error, OSError)

514

and error.errno != errno.ECHILD):

515

raise error

516

else:

517

if pid:

518

logger.warning("Checker was a zombie")

519

gobject.source_remove(self.checker_callback_tag)

520

self.checker_callback(pid, status,

521

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

522

725

# Start a new checker if needed

523

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 }

524

731

try:

525

# In case checker_command has exactly one % operator

526

command = self.checker_command % self.host

527

except TypeError:

528

# Escape attributes for the shell

529

escaped_attrs = dict(

530

(attr,

531

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

532

errors=

533

'replace')))

534

for attr in

535

self.runtime_expansions)

536

537

try:

538

command = self.checker_command % escaped_attrs

539

except TypeError as error:

540

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

541

' %s', self.checker_command, error)

542

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

543

738

self.current_checker_command = command

544

try:

545

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

546

command, self.name)

547

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

548

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

549

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

550

# always replaced by /dev/null.)

551

self.checker = subprocess.Popen(command,

552

close_fds=True,

553

shell=True, cwd="/")

554

self.checker_callback_tag = (gobject.child_watch_add

555

(self.checker.pid,

556

self.checker_callback,

557

data=command))

558

# The checker may have completed before the gobject

559

# watch was added. Check for this.

560

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

561

if pid:

562

gobject.source_remove(self.checker_callback_tag)

563

self.checker_callback(pid, status, command)

564

except OSError as error:

565

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

566

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)

567

764

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

568

765

return True

569

766

575

772

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

576

773

return

577

774

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

578

try:

579

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

580

#time.sleep(0.5)

581

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

582

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

583

except OSError as error:

584

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

585

raise

775

self.checker.terminate()

586

776

self.checker = None

587

777

588

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

589

def encrypt_secret(self, key):

590

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

591

hasheng = hashlib.sha256()

592

hasheng.update(key)

593

encryptionkey = hasheng.digest()

594

595

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

596

hasheng = hashlib.sha256()

597

hasheng.update(self.secret)

598

validationhash = hasheng.digest()

599

600

# Encrypt secret

601

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

602

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

603

Crypto.Cipher.AES.MODE_CFB, iv)

604

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

605

self.encrypted_secret = (ciphertext, iv)

606

607

# Decrypt a encrypted client secret

608

def decrypt_secret(self, key):

609

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

610

hasheng = hashlib.sha256()

611

hasheng.update(key)

612

encryptionkey = hasheng.digest()

613

614

# Decrypt encrypted secret

615

ciphertext, iv = self.encrypted_secret

616

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

617

Crypto.Cipher.AES.MODE_CFB, iv)

618

plain = ciphereng.decrypt(ciphertext)

619

620

# Validate decrypted secret to know if it was succesful

621

hasheng = hashlib.sha256()

622

validationhash = plain[:hasheng.digest_size]

623

secret = plain[hasheng.digest_size:]

624

hasheng.update(secret)

625

626

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

627

# the decrypted secret

628

if hasheng.digest() == validationhash:

629

self.secret = secret

630

else:

631

self.secret = key

632

del self.encrypted_secret

633

634

635

def dbus_service_property(dbus_interface, signature="v",

636

access="readwrite", byte_arrays=False):

778

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

637

783

"""Decorators for marking methods of a DBusObjectWithProperties to

638

784

become properties on the D-Bus.

639

785

648

794

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

649

795

if byte_arrays and signature != "ay":

650

796

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

651

" signature %r" % signature)

797

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

798

652

799

def decorator(func):

653

800

func._dbus_is_property = True

654

801

func._dbus_interface = dbus_interface

659

806

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

660

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

661

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

662

851

return decorator

663

852

664

853

665

854

class DBusPropertyException(dbus.exceptions.DBusException):

666

855

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

667

856

"""

668

def __unicode__(self):

669

return unicode(str(self))

857

pass

670

858

671

859

672

860

class DBusPropertyAccessException(DBusPropertyException):

690

878

"""

691

879

692

880

@staticmethod

693

def _is_dbus_property(obj):

694

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)

695

889

696

def _get_all_dbus_properties(self):

890

def _get_all_dbus_things(self, thing):

697

891

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

698

892

"""

699

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

893

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

894

athing.__get__(self))

700

895

for cls in self.__class__.__mro__

701

for name, prop in

702

inspect.getmembers(cls, self._is_dbus_property))

896

for name, athing in

897

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

703

898

704

899

def _get_dbus_property(self, interface_name, property_name):

705

900

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

706

901

property with the specified name and interface.

707

902

"""

708

for cls in self.__class__.__mro__:

709

for name, value in (inspect.getmembers

710

(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")):

711

906

if (value._dbus_name == property_name

712

907

and value._dbus_interface == interface_name):

713

908

return value.__get__(self)

714

909

715

910

# No such property

716

raise DBusPropertyNotFound(self.dbus_object_path + ":"

717

+ interface_name + "."

718

+ property_name)

911

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

912

self.dbus_object_path, interface_name, property_name))

719

913

720

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

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

721

916

out_signature="v")

722

917

def Get(self, interface_name, property_name):

723

918

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

741

936

# The byte_arrays option is not supported yet on

742

937

# signatures other than "ay".

743

938

if prop._dbus_signature != "ay":

744

raise ValueError

745

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

746

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))

747

944

prop(value)

748

945

749

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

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

750

948

out_signature="a{sv}")

751

949

def GetAll(self, interface_name):

752

950

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

754

952

755

953

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

756

954

"""

757

all = {}

758

for name, prop in self._get_all_dbus_properties():

955

properties = {}

956

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

759

957

if (interface_name

760

958

and interface_name != prop._dbus_interface):

761

959

# Interface non-empty but did not match

765

963

continue

766

964

value = prop()

767

965

if not hasattr(value, "variant_level"):

768

all[name] = value

966

properties[name] = value

769

967

continue

770

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

771

value.variant_level+1)

772

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

773

979

774

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

775

981

out_signature="s",

776

982

path_keyword='object_path',

777

983

connection_keyword='connection')

778

984

def Introspect(self, object_path, connection):

779

"""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.

780

988

"""

781

989

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

782

990

connection)

783

991

try:

784

992

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

993

785

994

def make_tag(document, name, prop):

786

995

e = document.createElement("property")

787

996

e.setAttribute("name", name)

788

997

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

789

998

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

790

999

return e

1000

791

1001

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

1002

# Add property tags

792

1003

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

793

1004

for name, prop

794

in self._get_all_dbus_properties()

1005

in self._get_all_dbus_things("property")

795

1006

if prop._dbus_interface

796

1007

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

797

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)

798

1038

# Add the names to the return values for the

799

1039

# "org.freedesktop.DBus.Properties" methods

800

1040

if (if_tag.getAttribute("name")

815

1055

except (AttributeError, xml.dom.DOMException,

816

1056

xml.parsers.expat.ExpatError) as error:

817

1057

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

818

error)

1058

exc_info=error)

819

1059

return xmlstring

820

1060

821

1061

822

def datetime_to_dbus (dt, variant_level=0):

1062

def datetime_to_dbus(dt, variant_level=0):

823

1063

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

824

1064

if dt is None:

825

1065

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

826

return dbus.String(dt.isoformat(),

827

variant_level=variant_level)

828

829

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

830

.__metaclass__):

831

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

832

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).

833

1091

"""

834

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

835

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

836

# methods, signals, or properties in them

837

for base in (b for b in bases

838

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

839

# Go though all attributes of the base class

840

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):

841

1100

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

842

1101

# with the wrong interface name

843

1102

if (not hasattr(attribute, "_dbus_interface")

844

or not attribute._dbus_interface

845

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

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

846

1105

continue

847

1106

# Create an alternate D-Bus interface name based on

848

1107

# the current name

849

alt_interface = (attribute._dbus_interface

850

.replace("se.recompile.Mandos",

851

"se.bsnet.fukt.Mandos"))

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

852

1111

# Is this a D-Bus signal?

853

1112

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

854

# Extract the original non-method function by

855

# black magic

856

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(

857

1117

zip(attribute.func_code.co_freevars,

858

attribute.__closure__))["func"]

859

.cell_contents)

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

860

1122

# Create a new, but exactly alike, function

861

1123

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

862

1124

# with the alternate D-Bus interface name

863

new_function = (dbus.service.signal

864

(alt_interface,

865

attribute._dbus_signature)

866

(types.FunctionType(

867

nonmethod_func.func_code,

868

nonmethod_func.func_globals,

869

nonmethod_func.func_name,

870

nonmethod_func.func_defaults,

871

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

872

1148

# Define a creator of a function to call both the

873

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

874

# 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

875

1152

def fixscope(func1, func2):

876

1153

"""This function is a scope container to pass

877

1154

func1 and func2 to the "call_both" function

878

1155

outside of its arguments"""

1156

879

1157

def call_both(*args, **kwargs):

880

1158

"""This function will emit two D-Bus

881

1159

signals by calling func1 and func2"""

882

1160

func1(*args, **kwargs)

883

1161

func2(*args, **kwargs)

1162

884

1163

return call_both

885

1164

# Create the "call_both" function and add it to

886

1165

# the class

887

attr[attrname] = fixscope(attribute,

888

new_function)

1166

attr[attrname] = fixscope(attribute, new_function)

889

1167

# Is this a D-Bus method?

890

1168

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

891

1169

# Create a new, but exactly alike, function

892

1170

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

893

1171

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

894

1172

# to the class.

895

attr[attrname] = (dbus.service.method

896

(alt_interface,

897

attribute._dbus_in_signature,

898

attribute._dbus_out_signature)

899

(types.FunctionType

900

(attribute.func_code,

901

attribute.func_globals,

902

attribute.func_name,

903

attribute.func_defaults,

904

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

905

1189

# Is this a D-Bus property?

906

1190

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

907

1191

# Create a new, but exactly alike, function

908

1192

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

909

1193

# property with the alternate D-Bus interface

910

1194

# name. Add it to the class.

911

attr[attrname] = (dbus_service_property

912

(alt_interface,

913

attribute._dbus_signature,

914

attribute._dbus_access,

915

attribute

916

._dbus_get_args_options

917

["byte_arrays"])

918

(types.FunctionType

919

(attribute.func_code,

920

attribute.func_globals,

921

attribute.func_name,

922

attribute.func_defaults,

923

attribute.func_closure)))

924

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

925

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"})

926

1252

class ClientDBus(Client, DBusObjectWithProperties):

927

1253

"""A Client class using D-Bus

928

1254

932

1258

"""

933

1259

934

1260

runtime_expansions = (Client.runtime_expansions

935

+ ("dbus_object_path",))

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

936

1264

937

1265

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

938

1266

939

1267

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

940

1268

self.bus = bus

941

1269

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

942

943

self._approvals_pending = 0

944

1270

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

945

1271

# the D-Bus

946

client_object_name = unicode(self.name).translate(

1272

client_object_name = str(self.name).translate(

947

1273

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

948

1274

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

949

self.dbus_object_path = (dbus.ObjectPath

950

("/clients/" + client_object_name))

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

951

1277

DBusObjectWithProperties.__init__(self, self.bus,

952

1278

self.dbus_object_path)

953

954

def notifychangeproperty(transform_func,

955

dbus_name, type_func=lambda x: x,

956

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):

957

1285

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

958

1286

its changes to DBus.

959

1287

960

1288

transform_fun: Function that takes a value and a variant_level

961

1289

and transforms it to a D-Bus type.

962

1290

dbus_name: D-Bus name of the variable

964

1292

to the D-Bus. Default: no transform

965

1293

variant_level: D-Bus variant level. Default: 1

966

1294

"""

967

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

1295

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

1296

968

1297

def setter(self, value):

969

1298

if hasattr(self, "dbus_object_path"):

970

1299

if (not hasattr(self, attrname) or

971

1300

type_func(getattr(self, attrname, None))

972

1301

!= type_func(value)):

973

dbus_value = transform_func(type_func(value),

974

variant_level

975

=variant_level)

976

self.PropertyChanged(dbus.String(dbus_name),

977

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())

978

1317

setattr(self, attrname, value)

979

1318

980

1319

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

981

1320

982

983

1321

expires = notifychangeproperty(datetime_to_dbus, "Expires")

984

1322

approvals_pending = notifychangeproperty(dbus.Boolean,

985

1323

"ApprovalPending",

987

1325

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

988

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

989

1327

"LastEnabled")

990

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

991

type_func = lambda checker:

992

checker is not None)

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

993

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

994

1332

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

995

1335

last_approval_request = notifychangeproperty(

996

1336

datetime_to_dbus, "LastApprovalRequest")

997

1337

approved_by_default = notifychangeproperty(dbus.Boolean,

998

1338

"ApprovedByDefault")

999

approval_delay = notifychangeproperty(dbus.UInt16,

1000

"ApprovalDelay",

1001

type_func =

1002

_timedelta_to_milliseconds)

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1003

1342

approval_duration = notifychangeproperty(

1004

dbus.UInt16, "ApprovalDuration",

1005

type_func = _timedelta_to_milliseconds)

1343

dbus.UInt64, "ApprovalDuration",

1344

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

1006

1345

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

1007

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

1008

type_func =

1009

_timedelta_to_milliseconds)

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1010

1349

extended_timeout = notifychangeproperty(

1011

dbus.UInt16, "ExtendedTimeout",

1012

type_func = _timedelta_to_milliseconds)

1013

interval = notifychangeproperty(dbus.UInt16,

1014

"Interval",

1015

type_func =

1016

_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)

1017

1355

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

1356

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

1357

invalidate_only=True)

1018

1358

1019

1359

del notifychangeproperty

1020

1360

1027

1367

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

1028

1368

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

1029

1369

1030

def checker_callback(self, pid, condition, command,

1031

*args, **kwargs):

1032

self.checker_callback_tag = None

1033

self.checker = None

1034

if os.WIFEXITED(condition):

1035

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:

1036

1377

# Emit D-Bus signal

1037

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1038

dbus.Int64(condition),

1379

dbus.Int64(0),

1039

1380

dbus.String(command))

1040

1381

else:

1041

1382

# Emit D-Bus signal

1042

1383

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

1043

dbus.Int64(condition),

1384

dbus.Int64(

1385

self.last_checker_signal),

1044

1386

dbus.String(command))

1045

1046

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

1047

*args, **kwargs)

1387

return ret

1048

1388

1049

1389

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

1050

old_checker = self.checker

1051

if self.checker is not None:

1052

old_checker_pid = self.checker.pid

1053

else:

1054

old_checker_pid = None

1390

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

1055

1391

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

1056

1392

# Only if new checker process was started

1057

1393

if (self.checker is not None

1061

1397

return r

1062

1398

1063

1399

def _reset_approved(self):

1064

self._approved = None

1400

self.approved = None

1065

1401

return False

1066

1402

1067

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)

1068

1407

self.send_changedstate()

1069

self._approved = value

1070

gobject.timeout_add(_timedelta_to_milliseconds

1071

(self.approval_duration),

1072

self._reset_approved)

1073

1074

1408

1075

1409

## D-Bus methods, signals & properties

1076

_interface = "se.recompile.Mandos.Client"

1410

1411

## Interfaces

1077

1412

1078

1413

## Signals

1079

1414

1090

1425

pass

1091

1426

1092

1427

# PropertyChanged - signal

1428

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

1093

1429

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

1094

1430

def PropertyChanged(self, property, value):

1095

1431

"D-Bus signal"

1159

1495

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

1160

1496

1161

1497

# ApprovedByDefault - property

1162

@dbus_service_property(_interface, signature="b",

1498

@dbus_service_property(_interface,

1499

signature="b",

1163

1500

access="readwrite")

1164

1501

def ApprovedByDefault_dbus_property(self, value=None):

1165

1502

if value is None: # get

1167

1504

self.approved_by_default = bool(value)

1168

1505

1169

1506

# ApprovalDelay - property

1170

@dbus_service_property(_interface, signature="t",

1507

@dbus_service_property(_interface,

1508

signature="t",

1171

1509

access="readwrite")

1172

1510

def ApprovalDelay_dbus_property(self, value=None):

1173

1511

if value is None: # get

1174

return dbus.UInt64(self.approval_delay_milliseconds())

1512

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

1513

* 1000)

1175

1514

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

1176

1515

1177

1516

# ApprovalDuration - property

1178

@dbus_service_property(_interface, signature="t",

1517

@dbus_service_property(_interface,

1518

signature="t",

1179

1519

access="readwrite")

1180

1520

def ApprovalDuration_dbus_property(self, value=None):

1181

1521

if value is None: # get

1182

return dbus.UInt64(_timedelta_to_milliseconds(

1183

self.approval_duration))

1522

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

1523

* 1000)

1184

1524

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

1185

1525

1186

1526

# Name - property

1194

1534

return dbus.String(self.fingerprint)

1195

1535

1196

1536

# Host - property

1197

@dbus_service_property(_interface, signature="s",

1537

@dbus_service_property(_interface,

1538

signature="s",

1198

1539

access="readwrite")

1199

1540

def Host_dbus_property(self, value=None):

1200

1541

if value is None: # get

1201

1542

return dbus.String(self.host)

1202

self.host = value

1543

self.host = str(value)

1203

1544

1204

1545

# Created - property

1205

1546

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

1206

1547

def Created_dbus_property(self):

1207

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

1548

return datetime_to_dbus(self.created)

1208

1549

1209

1550

# LastEnabled - property

1210

1551

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

1212

1553

return datetime_to_dbus(self.last_enabled)

1213

1554

1214

1555

# Enabled - property

1215

@dbus_service_property(_interface, signature="b",

1556

@dbus_service_property(_interface,

1557

signature="b",

1216

1558

access="readwrite")

1217

1559

def Enabled_dbus_property(self, value=None):

1218

1560

if value is None: # get

1223

1565

self.disable()

1224

1566

1225

1567

# LastCheckedOK - property

1226

@dbus_service_property(_interface, signature="s",

1568

@dbus_service_property(_interface,

1569

signature="s",

1227

1570

access="readwrite")

1228

1571

def LastCheckedOK_dbus_property(self, value=None):

1229

1572

if value is not None:

1231

1574

return

1232

1575

return datetime_to_dbus(self.last_checked_ok)

1233

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

1234

1582

# Expires - property

1235

1583

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

1236

1584

def Expires_dbus_property(self):

1242

1590

return datetime_to_dbus(self.last_approval_request)

1243

1591

1244

1592

# Timeout - property

1245

@dbus_service_property(_interface, signature="t",

1593

@dbus_service_property(_interface,

1594

signature="t",

1246

1595

access="readwrite")

1247

1596

def Timeout_dbus_property(self, value=None):

1248

1597

if value is None: # get

1249

return dbus.UInt64(self.timeout_milliseconds())

1598

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

1599

old_timeout = self.timeout

1250

1600

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

1251

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

1252

return

1253

# Reschedule timeout

1254

gobject.source_remove(self.disable_initiator_tag)

1255

self.disable_initiator_tag = None

1256

self.expires = None

1257

time_to_die = _timedelta_to_milliseconds((self

1258

.last_checked_ok

1259

+ self.timeout)

1260

- datetime.datetime

1261

.utcnow())

1262

if time_to_die <= 0:

1263

# The timeout has passed

1264

self.disable()

1265

else:

1266

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

1267

+ datetime.timedelta(milliseconds =

1268

time_to_die))

1269

self.disable_initiator_tag = (gobject.timeout_add

1270

(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)

1271

1616

1272

1617

# ExtendedTimeout - property

1273

@dbus_service_property(_interface, signature="t",

1618

@dbus_service_property(_interface,

1619

signature="t",

1274

1620

access="readwrite")

1275

1621

def ExtendedTimeout_dbus_property(self, value=None):

1276

1622

if value is None: # get

1277

return dbus.UInt64(self.extended_timeout_milliseconds())

1623

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

1624

* 1000)

1278

1625

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

1279

1626

1280

1627

# Interval - property

1281

@dbus_service_property(_interface, signature="t",

1628

@dbus_service_property(_interface,

1629

signature="t",

1282

1630

access="readwrite")

1283

1631

def Interval_dbus_property(self, value=None):

1284

1632

if value is None: # get

1285

return dbus.UInt64(self.interval_milliseconds())

1633

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

1286

1634

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

1287

1635

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

1288

1636

return

1289

# Reschedule checker run

1290

gobject.source_remove(self.checker_initiator_tag)

1291

self.checker_initiator_tag = (gobject.timeout_add

1292

(value, self.start_checker))

1293

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

1294

1643

1295

1644

# Checker - property

1296

@dbus_service_property(_interface, signature="s",

1645

@dbus_service_property(_interface,

1646

signature="s",

1297

1647

access="readwrite")

1298

1648

def Checker_dbus_property(self, value=None):

1299

1649

if value is None: # get

1300

1650

return dbus.String(self.checker_command)

1301

self.checker_command = value

1651

self.checker_command = str(value)

1302

1652

1303

1653

# CheckerRunning - property

1304

@dbus_service_property(_interface, signature="b",

1654

@dbus_service_property(_interface,

1655

signature="b",

1305

1656

access="readwrite")

1306

1657

def CheckerRunning_dbus_property(self, value=None):

1307

1658

if value is None: # get

1317

1668

return self.dbus_object_path # is already a dbus.ObjectPath

1318

1669

1319

1670

# Secret = property

1320

@dbus_service_property(_interface, signature="ay",

1321

access="write", byte_arrays=True)

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1322

1675

def Secret_dbus_property(self, value):

1323

self.secret = str(value)

1676

self.secret = bytes(value)

1324

1677

1325

1678

del _interface

1326

1679

1330

1683

self._pipe = child_pipe

1331

1684

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

1332

1685

if not self._pipe.recv():

1333

raise KeyError()

1686

raise KeyError(fpr)

1334

1687

1335

1688

def __getattribute__(self, name):

1336

if(name == '_pipe'):

1689

if name == '_pipe':

1337

1690

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

1338

1691

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

1339

1692

data = self._pipe.recv()

1340

1693

if data[0] == 'data':

1341

1694

return data[1]

1342

1695

if data[0] == 'function':

1696

1343

1697

def func(*args, **kwargs):

1344

1698

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

1345

1699

return self._pipe.recv()[1]

1700

1346

1701

return func

1347

1702

1348

1703

def __setattr__(self, name, value):

1349

if(name == '_pipe'):

1704

if name == '_pipe':

1350

1705

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

1351

1706

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

1352

1707

1353

class ClientDBusTransitional(ClientDBus):

1354

__metaclass__ = AlternateDBusNamesMetaclass

1355

1708

1356

1709

class ClientHandler(socketserver.BaseRequestHandler, object):

1357

1710

"""A class to handle client connections.

1362

1715

def handle(self):

1363

1716

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

1364

1717

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

1365

unicode(self.client_address))

1718

str(self.client_address))

1366

1719

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

1367

1720

self.server.child_pipe.fileno())

1368

1721

1369

session = (gnutls.connection

1370

.ClientSession(self.request,

1371

gnutls.connection

1372

.X509Credentials()))

1722

session = gnutls.connection.ClientSession(

1723

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

1373

1724

1374

1725

# Note: gnutls.connection.X509Credentials is really a

1375

1726

# generic GnuTLS certificate credentials object so long as

1384

1735

priority = self.server.gnutls_priority

1385

1736

if priority is None:

1386

1737

priority = "NORMAL"

1387

(gnutls.library.functions

1388

.gnutls_priority_set_direct(session._c_object,

1389

priority, None))

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1390

1740

1391

1741

# Start communication using the Mandos protocol

1392

1742

# Get protocol number

1394

1744

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

1395

1745

try:

1396

1746

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

1397

raise RuntimeError

1747

raise RuntimeError(line)

1398

1748

except (ValueError, IndexError, RuntimeError) as error:

1399

1749

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

1400

1750

return

1412

1762

approval_required = False

1413

1763

try:

1414

1764

try:

1415

fpr = self.fingerprint(self.peer_certificate

1416

(session))

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1417

1767

except (TypeError,

1418

1768

gnutls.errors.GNUTLSError) as error:

1419

1769

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

1434

1784

while True:

1435

1785

if not client.enabled:

1436

1786

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

1437

client.name)

1787

client.name)

1438

1788

if self.server.use_dbus:

1439

1789

# Emit D-Bus signal

1440

1790

client.Rejected("Disabled")

1441

1791

return

1442

1792

1443

if client._approved or not client.approval_delay:

1793

if client.approved or not client.approval_delay:

1444

1794

#We are approved or approval is disabled

1445

1795

break

1446

elif client._approved is None:

1796

elif client.approved is None:

1447

1797

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

1448

1798

client.name)

1449

1799

if self.server.use_dbus:

1450

1800

# Emit D-Bus signal

1451

1801

client.NeedApproval(

1452

client.approval_delay_milliseconds(),

1453

client.approved_by_default)

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1454

1804

else:

1455

1805

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

1456

1806

client.name)

1462

1812

#wait until timeout or approved

1463

1813

time = datetime.datetime.now()

1464

1814

client.changedstate.acquire()

1465

(client.changedstate.wait

1466

(float(client._timedelta_to_milliseconds(delay)

1467

/ 1000)))

1815

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

1468

1816

client.changedstate.release()

1469

1817

time2 = datetime.datetime.now()

1470

1818

if (time2 - time) >= delay:

1486

1834

try:

1487

1835

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

1488

1836

except gnutls.errors.GNUTLSError as error:

1489

logger.warning("gnutls send failed")

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1490

1839

return

1491

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

1492

sent, len(client.secret)

1493

- (sent_size + sent))

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1494

1843

sent_size += sent

1495

1844

1496

1845

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

1497

1846

# bump the timeout using extended_timeout

1498

client.checked_ok(client.extended_timeout)

1847

client.bump_timeout(client.extended_timeout)

1499

1848

if self.server.use_dbus:

1500

1849

# Emit D-Bus signal

1501

1850

client.GotSecret()

1506

1855

try:

1507

1856

session.bye()

1508

1857

except gnutls.errors.GNUTLSError as error:

1509

logger.warning("GnuTLS bye failed")

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1510

1860

1511

1861

@staticmethod

1512

1862

def peer_certificate(session):

1513

1863

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

1514

1864

# If not an OpenPGP certificate...

1515

if (gnutls.library.functions

1516

.gnutls_certificate_type_get(session._c_object)

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1517

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1518

1868

# ...do the normal thing

1519

1869

return session.peer_certificate

1533

1883

def fingerprint(openpgp):

1534

1884

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1535

1885

# New GnuTLS "datum" with the OpenPGP public key

1536

datum = (gnutls.library.types

1537

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

1538

ctypes.POINTER

1539

(ctypes.c_ubyte)),

1540

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)))

1541

1890

# New empty GnuTLS certificate

1542

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1543

(gnutls.library.functions

1544

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1545

1894

# Import the OpenPGP public key into the certificate

1546

(gnutls.library.functions

1547

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

1548

gnutls.library.constants

1549

.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)

1550

1898

# Verify the self signature in the key

1551

1899

crtverify = ctypes.c_uint()

1552

(gnutls.library.functions

1553

.gnutls_openpgp_crt_verify_self(crt, 0,

1554

ctypes.byref(crtverify)))

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1555

1902

if crtverify.value != 0:

1556

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1557

raise (gnutls.errors.CertificateSecurityError

1558

("Verify failed"))

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1559

1906

# New buffer for the fingerprint

1560

1907

buf = ctypes.create_string_buffer(20)

1561

1908

buf_len = ctypes.c_size_t()

1562

1909

# Get the fingerprint from the certificate into the buffer

1563

(gnutls.library.functions

1564

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

1565

ctypes.byref(buf_len)))

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1566

1912

# Deinit the certificate

1567

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1568

1914

# Convert the buffer to a Python bytestring

1569

1915

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

1570

1916

# Convert the bytestring to hexadecimal notation

1571

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

1917

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

1572

1918

return hex_fpr

1573

1919

1574

1920

1575

1921

class MultiprocessingMixIn(object):

1576

1922

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

1923

1577

1924

def sub_process_main(self, request, address):

1578

1925

try:

1579

1926

self.finish_request(request, address)

1580

except:

1927

except Exception:

1581

1928

self.handle_error(request, address)

1582

1929

self.close_request(request)

1583

1930

1584

1931

def process_request(self, request, address):

1585

1932

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

1586

1933

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

1587

args = (request,

1588

address))

1934

args = (request, address))

1589

1935

proc.start()

1590

1936

return proc

1591

1937

1592

1938

1593

1939

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1594

1940

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

1941

1595

1942

def process_request(self, request, client_address):

1596

1943

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

1597

1944

1606

1953

1607

1954

def add_pipe(self, parent_pipe, proc):

1608

1955

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

1609

raise NotImplementedError

1956

raise NotImplementedError()

1610

1957

1611

1958

1612

1959

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1618

1965

interface: None or a network interface name (string)

1619

1966

use_ipv6: Boolean; to use IPv6 or not

1620

1967

"""

1968

1621

1969

def __init__(self, server_address, RequestHandlerClass,

1622

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

"""

1623

1976

self.interface = interface

1624

1977

if use_ipv6:

1625

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.

1626

2005

socketserver.TCPServer.__init__(self, server_address,

1627

2006

RequestHandlerClass)

2007

1628

2008

def server_bind(self):

1629

2009

"""This overrides the normal server_bind() function

1630

2010

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

1636

2016

self.interface)

1637

2017

else:

1638

2018

try:

1639

self.socket.setsockopt(socket.SOL_SOCKET,

1640

SO_BINDTODEVICE,

1641

str(self.interface

1642

+ '\0'))

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1643

2022

except socket.error as error:

1644

if error[0] == errno.EPERM:

1645

logger.error("No permission to"

1646

" bind to interface %s",

1647

self.interface)

1648

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:

1649

2027

logger.error("SO_BINDTODEVICE not available;"

1650

2028

" cannot bind to interface %s",

1651

2029

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

1652

2033

else:

1653

2034

raise

1654

2035

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

1657

2038

if self.address_family == socket.AF_INET6:

1658

2039

any_address = "::" # in6addr_any

1659

2040

else:

1660

any_address = socket.INADDR_ANY

2041

any_address = "0.0.0.0" # INADDR_ANY

1661

2042

self.server_address = (any_address,

1662

2043

self.server_address[1])

1663

2044

elif not self.server_address[1]:

1664

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

1665

0)

2045

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

1666

2046

# if self.interface:

1667

2047

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

1668

2048

# 0, # port

1682

2062

1683

2063

Assumes a gobject.MainLoop event loop.

1684

2064

"""

2065

1685

2066

def __init__(self, server_address, RequestHandlerClass,

1686

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

1687

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):

1688

2073

self.enabled = False

1689

2074

self.clients = clients

1690

2075

if self.clients is None:

1694

2079

IPv6_TCPServer.__init__(self, server_address,

1695

2080

RequestHandlerClass,

1696

2081

interface = interface,

1697

use_ipv6 = use_ipv6)

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1698

2085

def server_activate(self):

1699

2086

if self.enabled:

1700

2087

return socketserver.TCPServer.server_activate(self)

1704

2091

1705

2092

def add_pipe(self, parent_pipe, proc):

1706

2093

# Call "handle_ipc" for both data and EOF events

1707

gobject.io_add_watch(parent_pipe.fileno(),

1708

gobject.IO_IN | gobject.IO_HUP,

1709

functools.partial(self.handle_ipc,

1710

parent_pipe =

1711

parent_pipe,

1712

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))

1713

2100

1714

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

1715

proc = None, client_object=None):

1716

condition_names = {

1717

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

1718

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

1719

# blocking).

1720

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

1721

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

1722

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

1723

# broken, usually for pipes and

1724

# sockets).

1725

}

1726

conditions_string = ' | '.join(name

1727

for cond, name in

1728

condition_names.iteritems()

1729

if cond & condition)

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

1730

2105

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

1731

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

2106

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

1732

2107

# Wait for other process to exit

1733

2108

proc.join()

1734

2109

return False

1755

2130

parent_pipe.send(False)

1756

2131

return False

1757

2132

1758

gobject.io_add_watch(parent_pipe.fileno(),

1759

gobject.IO_IN | gobject.IO_HUP,

1760

functools.partial(self.handle_ipc,

1761

parent_pipe =

1762

parent_pipe,

1763

proc = proc,

1764

client_object =

1765

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))

1766

2140

parent_pipe.send(True)

1767

2141

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

1768

2142

# same fileno

1774

2148

1775

2149

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

1776

2150

funcname)(*args,

1777

**kwargs)))

2151

**kwargs)))

1778

2152

1779

2153

if command == 'getattr':

1780

2154

attrname = request[1]

1781

if callable(client_object.__getattribute__(attrname)):

1782

parent_pipe.send(('function',))

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1783

2158

else:

1784

parent_pipe.send(('data', client_object

1785

.__getattribute__(attrname)))

2159

parent_pipe.send((

2160

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

1786

2161

1787

2162

if command == 'setattr':

1788

2163

attrname = request[1]

1792

2167

return True

1793

2168

1794

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

1795

2266

def string_to_delta(interval):

1796

2267

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

1797

2268

1808

2279

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

1809

2280

datetime.timedelta(0, 330)

1810

2281

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

1811

2288

timevalue = datetime.timedelta(0)

1812

2289

for s in interval.split():

1813

2290

try:

1814

suffix = unicode(s[-1])

2291

suffix = s[-1]

1815

2292

value = int(s[:-1])

1816

2293

if suffix == "d":

1817

2294

delta = datetime.timedelta(value)

1824

2301

elif suffix == "w":

1825

2302

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

1826

2303

else:

1827

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

1828

except (ValueError, IndexError) as e:

2304

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

2305

except IndexError as e:

1829

2306

raise ValueError(*(e.args))

1830

2307

timevalue += delta

1831

2308

return timevalue

1832

2309

1833

2310

1834

def if_nametoindex(interface):

1835

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

1836

1837

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

1838

global if_nametoindex

1839

try:

1840

if_nametoindex = (ctypes.cdll.LoadLibrary

1841

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

1842

.if_nametoindex)

1843

except (OSError, AttributeError):

1844

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

1845

def if_nametoindex(interface):

1846

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

1847

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

1848

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

1849

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1850

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

1851

interface))

1852

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

1853

ifreq[16:20])[0]

1854

return interface_index

1855

return if_nametoindex(interface)

1856

1857

1858

2311

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

1859

2312

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

1860

2313

1868

2321

sys.exit()

1869

2322

if not noclose:

1870

2323

# Close all standard open file descriptors

1871

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

2324

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

1872

2325

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

1873

2326

raise OSError(errno.ENODEV,

1874

"%s not a character device"

1875

% os.path.devnull)

2327

"{} not a character device"

2328

.format(os.devnull))

1876

2329

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

1877

2330

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

1878

2331

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

1887

2340

1888

2341

parser = argparse.ArgumentParser()

1889

2342

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

1890

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

2343

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

1891

2344

help="show version number and exit")

1892

2345

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

1893

2346

help="Bind to interface IF")

1899

2352

help="Run self-test")

1900

2353

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

1901

2354

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

1902

" to terminal")

2355

" to terminal", default=None)

1903

2356

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

1904

2357

help="Debug level for stdout output")

1905

2358

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

1912

2365

" files")

1913

2366

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

1914

2367

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

1915

" system bus interface")

2368

" system bus interface", default=None)

1916

2369

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

1917

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

2370

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

2371

default=None)

1918

2372

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

1919

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

1920

default=True)

1921

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

1922

2386

options = parser.parse_args()

1923

2387

1924

2388

if options.check:

1925

2389

import doctest

1926

doctest.testmod()

1927

sys.exit()

2390

fail_count, test_count = doctest.testmod()

2391

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

1928

2392

1929

2393

# Default values for config file for server-global settings

1930

2394

server_defaults = { "interface": "",

1932

2396

"port": "",

1933

2397

"debug": "False",

1934

2398

"priority":

1935

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

2399

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

2400

":+SIGN-DSA-SHA256",

1936

2401

"servicename": "Mandos",

1937

2402

"use_dbus": "True",

1938

2403

"use_ipv6": "True",

1939

2404

"debuglevel": "",

1940

}

2405

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

1941

2411

1942

2412

# Parse config file for server-global settings

1943

2413

server_config = configparser.SafeConfigParser(server_defaults)

1944

2414

del server_defaults

1945

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

1946

"mandos.conf"))

2415

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

1947

2416

# Convert the SafeConfigParser object to a dict

1948

2417

server_settings = server_config.defaults()

1949

2418

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

1950

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

2419

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

1951

2420

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

1952

2421

option)

1953

2422

if server_settings["port"]:

1954

2423

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

1955

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"])

1956

2434

del server_config

1957

2435

1958

2436

# Override the settings from the config file with command line

1959

2437

# options, if set.

1960

2438

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

1961

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

1962

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

2439

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

2440

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

2441

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

1963

2442

value = getattr(options, option)

1964

2443

if value is not None:

1965

2444

server_settings[option] = value

1966

2445

del options

1967

2446

# Force all strings to be unicode

1968

2447

for option in server_settings.keys():

1969

if type(server_settings[option]) is str:

1970

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

1971

2458

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

1972

2459

1973

2460

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

1974

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

1975

2467

# For convenience

1976

2468

debug = server_settings["debug"]

1977

2469

debuglevel = server_settings["debuglevel"]

1978

2470

use_dbus = server_settings["use_dbus"]

1979

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)

1980

2485

1981

2486

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

1982

syslogger.setFormatter(logging.Formatter

1983

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

1984

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

1985

% server_settings["servicename"]))

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

1986

2491

1987

2492

# Parse config file with clients

1988

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

1989

"extended_timeout": "15m",

1990

"interval": "2m",

1991

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

1992

"host": "",

1993

"approval_delay": "0s",

1994

"approval_duration": "1s",

1995

}

1996

client_config = configparser.SafeConfigParser(client_defaults)

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

1997

2495

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

1998

2496

"clients.conf"))

1999

2497

2000

2498

global mandos_dbus_service

2001

2499

mandos_dbus_service = None

2002

2500

2003

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

2004

server_settings["port"]),

2005

ClientHandler,

2006

interface=(server_settings["interface"]

2007

or None),

2008

use_ipv6=use_ipv6,

2009

gnutls_priority=

2010

server_settings["priority"],

2011

use_dbus=use_dbus)

2012

if not debug:

2013

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

2014

2517

try:

2015

pidfile = open(pidfilename, "w")

2016

except IOError:

2017

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)

2018

2522

2019

try:

2020

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

2021

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

2022

except KeyError:

2523

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

2023

2524

try:

2024

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

2025

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

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

2026

2528

except KeyError:

2027

try:

2028

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

2029

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

2030

except KeyError:

2031

uid = 65534

2032

gid = 65534

2529

continue

2530

else:

2531

uid = 65534

2532

gid = 65534

2033

2533

try:

2034

2534

os.setgid(gid)

2035

2535

os.setuid(uid)

2036

2536

except OSError as error:

2037

if error[0] != errno.EPERM:

2038

raise error

2039

2040

if not debug and not debuglevel:

2041

syslogger.setLevel(logging.WARNING)

2042

console.setLevel(logging.WARNING)

2043

if debuglevel:

2044

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

2045

syslogger.setLevel(level)

2046

console.setLevel(level)

2537

if error.errno != errno.EPERM:

2538

raise

2047

2539

2048

2540

if debug:

2049

2541

# Enable all possible GnuTLS debugging

2056

2548

def debug_gnutls(level, string):

2057

2549

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

2058

2550

2059

(gnutls.library.functions

2060

.gnutls_global_set_log_function(debug_gnutls))

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2061

2553

2062

2554

# Redirect stdin so all checkers get /dev/null

2063

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

2555

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

2064

2556

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

2065

2557

if null > 2:

2066

2558

os.close(null)

2067

else:

2068

# No console logging

2069

logger.removeHandler(console)

2070

2559

2071

2560

# Need to fork before connecting to D-Bus

2072

if not debug:

2561

if not foreground:

2073

2562

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

2074

2563

daemon()

2075

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

2076

2569

global main_loop

2077

2570

# From the Avahi example code

2078

DBusGMainLoop(set_as_default=True )

2571

DBusGMainLoop(set_as_default=True)

2079

2572

main_loop = gobject.MainLoop()

2080

2573

bus = dbus.SystemBus()

2081

2574

# End of Avahi example code

2082

2575

if use_dbus:

2083

2576

try:

2084

2577

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

2085

bus, do_not_queue=True)

2086

old_bus_name = (dbus.service.BusName

2087

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

2088

do_not_queue=True))

2089

except dbus.exceptions.NameExistsException as e:

2090

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)

2091

2585

use_dbus = False

2092

2586

server_settings["use_dbus"] = False

2093

2587

tcp_server.use_dbus = False

2094

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2095

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

2096

servicetype = "_mandos._tcp",

2097

protocol = protocol, bus = bus)

2098

if server_settings["interface"]:

2099

service.interface = (if_nametoindex

2100

(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"))

2101

2598

2102

2599

global multiprocessing_manager

2103

2600

multiprocessing_manager = multiprocessing.Manager()

2104

2601

2105

2602

client_class = Client

2106

2603

if use_dbus:

2107

client_class = functools.partial(ClientDBusTransitional,

2108

bus = bus)

2109

2110

special_settings = {

2111

# Some settings need to be accessd by special methods;

2112

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

2113

"approved_by_default":

2114

lambda section:

2115

client_config.getboolean(section, "approved_by_default"),

2116

}

2117

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

2118

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

2119

# with exceptions for any special settings as defined above

2120

client_settings = dict((clientname,

2121

dict((setting,

2122

(value if setting not in special_settings

2123

else special_settings[setting](clientname)))

2124

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

2125

for clientname in client_config.sections())

2126

2604

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

2605

2606

client_settings = Client.config_parser(client_config)

2127

2607

old_client_settings = {}

2128

clients_data = []

2129

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.

2130

2619

if server_settings["restore"]:

2131

2620

try:

2132

2621

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

2133

clients_data, old_client_settings = pickle.load(stored_state)

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2134

2624

os.remove(stored_state_path)

2135

2625

except IOError as e:

2136

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

2137

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)

2138

2632

raise

2139

2140

for client in clients_data:

2141

client_name = client["name"]

2142

2143

# Decide which value to use after restoring saved state.

2144

# We have three different values: Old config file,

2145

# new config file, and saved state.

2146

# New config value takes precedence if it differs from old

2147

# config value, otherwise use saved state.

2148

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))

2149

2689

try:

2150

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

2151

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

2152

# attribute)

2153

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

2154

setattr(client, name, value)

2155

except KeyError:

2156

pass

2157

2158

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

2159

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

2160

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

2161

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

2162

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

2163

> client["interval"]):

2164

if client["last_checker_status"] != 0:

2165

client["enabled"] = False

2166

else:

2167

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

2168

2169

client["changedstate"] = (multiprocessing_manager

2170

.Condition(multiprocessing_manager

2171

.Lock()))

2172

if use_dbus:

2173

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2174

tcp_server.clients[client_name] = new_client

2175

new_client.bus = bus

2176

for name, value in client.iteritems():

2177

setattr(new_client, name, value)

2178

client_object_name = unicode(client_name).translate(

2179

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

2180

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

2181

new_client.dbus_object_path = (dbus.ObjectPath

2182

("/clients/" + client_object_name))

2183

DBusObjectWithProperties.__init__(new_client,

2184

new_client.bus,

2185

new_client.dbus_object_path)

2186

else:

2187

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

2188

for name, value in client.iteritems():

2189

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

2190

2191

tcp_server.clients[client_name].decrypt_secret(

2192

client_settings[client_name]["secret"])

2193

2194

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

2195

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

2196

del tcp_server.clients[clientname]

2197

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

2198

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

2199

config =

2200

client_settings

2201

[clientname]))

2202

2203

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

2204

2715

if not tcp_server.clients:

2205

2716

logger.warning("No clients defined")

2206

2207

if not debug:

2208

try:

2209

with pidfile:

2210

pid = os.getpid()

2211

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

2212

del pidfile

2213

except IOError:

2214

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

2215

pidfilename, pid)

2216

except NameError:

2217

# "pidfile" was never created

2218

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

2219

2728

del pidfilename

2220

2221

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

2222

2729

2223

2730

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

2224

2731

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

2225

2732

2226

2733

if use_dbus:

2227

class MandosDBusService(dbus.service.Object):

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2228

2738

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

2739

2229

2740

def __init__(self):

2230

2741

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

2742

2231

2743

_interface = "se.recompile.Mandos"

2232

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2233

2751

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

2234

2752

def ClientAdded(self, objpath):

2235

2753

"D-Bus signal"

2248

2766

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

2249

2767

def GetAllClients(self):

2250

2768

"D-Bus method"

2251

return dbus.Array(c.dbus_object_path

2252

for c in

2769

return dbus.Array(c.dbus_object_path for c in

2253

2770

tcp_server.clients.itervalues())

2254

2771

2255

2772

@dbus.service.method(_interface,

2257

2774

def GetAllClientsWithProperties(self):

2258

2775

"D-Bus method"

2259

2776

return dbus.Dictionary(

2260

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

2261

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

2777

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

2778

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

2262

2779

signature="oa{sv}")

2263

2780

2264

2781

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

2277

2794

2278

2795

del _interface

2279

2796

2280

class MandosDBusServiceTransitional(MandosDBusService):

2281

__metaclass__ = AlternateDBusNamesMetaclass

2282

mandos_dbus_service = MandosDBusServiceTransitional()

2797

mandos_dbus_service = MandosDBusService()

2283

2798

2284

2799

def cleanup():

2285

2800

"Cleanup function; run on exit"

2286

service.cleanup()

2801

if zeroconf:

2802

service.cleanup()

2287

2803

2288

2804

multiprocessing.active_children()

2805

wnull.close()

2289

2806

if not (tcp_server.clients or client_settings):

2290

2807

return

2291

2292

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

2293

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

2294

# secret will thus be unrecovable.

2295

clients = []

2296

for client in tcp_server.clients.itervalues():

2297

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

2298

2299

client_dict = {}

2300

2301

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

2302

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

2303

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

2304

exclude.add(name)

2305

2306

client_dict["encrypted_secret"] = client.encrypted_secret

2307

for attr in client.client_structure:

2308

if attr not in exclude:

2309

client_dict[attr] = getattr(client, attr)

2310

2311

clients.append(client_dict)

2312

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

2313

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

2314

2837

try:

2315

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:

2316

2844

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

2317

except IOError as e:

2318

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

2319

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)

2320

2859

raise

2321

2860

2322

2861

# Delete all clients, and settings from config

2323

2862

while tcp_server.clients:

2324

2863

name, client = tcp_server.clients.popitem()

2328

2867

client.disable(quiet=True)

2329

2868

if use_dbus:

2330

2869

# Emit D-Bus signal

2331

mandos_dbus_service.ClientRemoved(client

2332

.dbus_object_path,

2333

client.name)

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2334

2872

client_settings.clear()

2335

2873

2336

2874

atexit.register(cleanup)

2342

2880

# Need to initiate checking of clients

2343

2881

if client.enabled:

2344

2882

client.init_checker()

2345

2346

2883

2347

2884

tcp_server.enable()

2348

2885

tcp_server.server_activate()

2349

2886

2350

2887

# Find out what port we got

2351

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

2888

if zeroconf:

2889

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

2352

2890

if use_ipv6:

2353

2891

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

2354

" flowinfo %d, scope_id %d"

2355

% tcp_server.socket.getsockname())

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2356

2894

else: # IPv4

2357

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

2358

% tcp_server.socket.getsockname())

2895

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

2896

*tcp_server.socket.getsockname())

2359

2897

2360

2898

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

2361

2899

2362

2900

try:

2363

# From the Avahi example code

2364

try:

2365

service.activate()

2366

except dbus.exceptions.DBusException as error:

2367

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

2368

cleanup()

2369

sys.exit(1)

2370

# 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

2371

2910

2372

2911

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

2373

2912

lambda *args, **kwargs:

2377

2916

logger.debug("Starting main loop")

2378

2917

main_loop.run()

2379

2918

except AvahiError as error:

2380

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

2919

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

2381

2920

cleanup()

2382

2921

sys.exit(1)

2383

2922

except KeyboardInterrupt: