/mandos/release : revision 237.7.307

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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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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@fukt.bsnet.se>.

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# Contact the authors at <mandos@recompile.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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str(error))

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

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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401

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

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else:

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

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def activate(self):

255

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

256

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if self.server is None:

260

411

follow_name_owner_changes=True),

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412

avahi.DBUS_INTERFACE_SERVER)

262

413

self.server.connect_to_signal("StateChanged",

263

self.server_state_changed)

414

self.server_state_changed)

264

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

265

416

266

417

418

class AvahiServiceToSyslog(AvahiService):

419

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

420

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

421

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

422

syslogger.setFormatter(logging.Formatter(

423

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

424

.format(self.name)))

425

return ret

426

427

def call_pipe(connection, # : multiprocessing.Connection

428

func, *args, **kwargs):

429

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

430

431

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

432

return value on the provided multiprocessing.Connection.

433

"""

434

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

435

connection.close()

436

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class Client(object):

268

438

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

269

439

270

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Attributes:

271

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

441

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

272

442

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

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443

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

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

281

451

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

282

452

checker_initiator_tag: a gobject event source tag, or None

283

453

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

454

client_structure: Object describing what attributes a client has

455

and is used for storing the client at exit

284

456

current_checker_command: string; current running checker_command

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

286

457

disable_initiator_tag: a gobject event source tag, or None

287

458

enabled: bool()

288

459

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

291

462

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

292

463

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

293

464

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

294

last_enabled: datetime.datetime(); (UTC)

465

last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

467

checker, -2 means no checker completed yet.

468

last_checker_signal: The signal which killed the last checker, if

469

last_checker_status is -1

470

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

295

471

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

296

472

D-Bus identifiers

297

473

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

298

474

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

299

475

until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

301

477

runtime_expansions: Allowed attributes for runtime expansion.

302

478

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

303

479

disabled, or None

480

server_settings: The server_settings dict from main()

304

481

"""

305

482

306

483

runtime_expansions = ("approval_delay", "approval_duration",

307

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

308

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

484

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

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

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"last_approval_request", "last_checked_ok",

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487

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

488

client_defaults = {

489

"timeout": "PT5M",

490

"extended_timeout": "PT15M",

491

"interval": "PT2M",

492

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

493

"host": "",

494

"approval_delay": "PT0S",

495

"approval_duration": "PT1S",

496

"approved_by_default": "True",

497

"enabled": "True",

498

}

310

499

311

500

@staticmethod

312

def _timedelta_to_milliseconds(td):

313

"Convert a datetime.timedelta() to milliseconds"

314

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

315

+ (td.seconds * 1000)

316

+ (td.microseconds // 1000))

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return self._timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return self._timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return self._timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return self._timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

attribute."""

501

def config_parser(config):

502

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

503

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

504

with exceptions for any special settings as defined above.

505

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

506

value given the same arguments.

507

"""

508

settings = {}

509

for client_name in config.sections():

510

section = dict(config.items(client_name))

511

client = settings[client_name] = {}

512

513

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

514

# Reformat values from string types to Python types

515

client["approved_by_default"] = config.getboolean(

516

client_name, "approved_by_default")

517

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

518

"enabled")

519

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

523

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

524

.replace(" ", ""))

525

if "secret" in section:

526

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

527

elif "secfile" in section:

528

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

529

(section["secfile"])),

530

"rb") as secfile:

531

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

532

else:

533

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

534

.format(section))

535

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

536

client["extended_timeout"] = string_to_delta(

537

section["extended_timeout"])

538

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

539

client["approval_delay"] = string_to_delta(

540

section["approval_delay"])

541

client["approval_duration"] = string_to_delta(

542

section["approval_duration"])

543

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

544

client["last_approval_request"] = None

545

client["last_checked_ok"] = None

546

client["last_checker_status"] = -2

547

548

return settings

549

550

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

337

551

self.name = name

338

if config is None:

339

config = {}

552

if server_settings is None:

553

server_settings = {}

554

self.server_settings = server_settings

555

# adding all client settings

556

for setting, value in settings.items():

557

setattr(self, setting, value)

558

559

if self.enabled:

560

if not hasattr(self, "last_enabled"):

561

self.last_enabled = datetime.datetime.utcnow()

562

if not hasattr(self, "expires"):

563

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

564

+ self.timeout)

565

else:

566

self.last_enabled = None

567

self.expires = None

568

340

569

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

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

345

.replace(" ", ""))

346

570

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

571

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

572

datetime.datetime.utcnow())

573

574

# attributes specific for this server instance

367

575

self.checker = None

368

576

self.checker_initiator_tag = None

369

577

self.disable_initiator_tag = None

370

self.expires = None

371

578

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

579

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

580

self.approved = None

378

581

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

586

if not attr.startswith("_")]

587

self.client_structure.append("client_structure")

588

589

for name, t in inspect.getmembers(

590

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

591

if not name.startswith("_"):

592

self.client_structure.append(name)

384

593

594

# Send notice to process children that client state has changed

385

595

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

596

with self.changedstate:

597

self.changedstate.notify_all()

598

390

599

def enable(self):

391

600

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

392

601

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

393

602

# Already enabled

394

603

return

395

self.send_changedstate()

604

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

605

self.enabled = True

396

606

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

401

self.start_checker))

402

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

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

407

self.enabled = True

408

# Also start a new checker *right now*.

409

self.start_checker()

607

self.init_checker()

608

self.send_changedstate()

410

609

411

610

def disable(self, quiet=True):

412

611

"""Disable this client."""

413

612

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

414

613

return False

415

614

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

615

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

419

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

616

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

420

617

gobject.source_remove(self.disable_initiator_tag)

421

618

self.disable_initiator_tag = None

422

619

self.expires = None

423

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

620

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

424

621

gobject.source_remove(self.checker_initiator_tag)

425

622

self.checker_initiator_tag = None

426

623

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

624

self.enabled = False

625

if not quiet:

626

self.send_changedstate()

430

627

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

431

628

return False

432

629

433

630

def __del__(self):

434

self.disable_hook = None

435

631

self.disable()

436

632

437

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

633

def init_checker(self):

634

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

635

# and every interval from then on.

636

if self.checker_initiator_tag is not None:

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

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

640

self.start_checker)

641

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

642

if self.disable_initiator_tag is not None:

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

646

# Also start a new checker *right now*.

647

self.start_checker()

648

649

def checker_callback(self, source, condition, connection,

650

command):

438

651

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

439

652

self.checker_callback_tag = None

440

653

self.checker = None

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

661

if self.last_checker_status == 0:

444

662

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

445

663

vars(self))

446

664

self.checked_ok()

447

665

else:

448

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

449

vars(self))

666

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

450

667

else:

668

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

451

670

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

452

671

vars(self))

453

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

672

return False

673

674

def checked_ok(self):

675

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

676

self.last_checked_ok = datetime.datetime.utcnow()

677

self.last_checker_status = 0

678

self.last_checker_signal = None

679

self.bump_timeout()

680

681

def bump_timeout(self, timeout=None):

682

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

460

683

if timeout is None:

461

684

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

685

if self.disable_initiator_tag is not None:

686

gobject.source_remove(self.disable_initiator_tag)

687

self.disable_initiator_tag = None

688

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

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

691

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

468

692

469

693

def need_approval(self):

470

694

self.last_approval_request = datetime.datetime.utcnow()

475

699

If a checker already exists, leave it running and do

476

700

nothing."""

477

701

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

702

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

703

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

704

# would inevitably timeout, since no checker would get a

705

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

482

706

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

483

707

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

484

708

# should be.

485

709

486

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

487

try:

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

self.current_checker_command)

710

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

711

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

712

self.checker.join()

713

self.checker = None

499

714

# Start a new checker if needed

500

715

if self.checker is None:

716

# Escape attributes for the shell

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

501

720

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

721

command = self.checker_command % escaped_attrs

722

except TypeError as error:

723

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

724

self.checker_command,

725

exc_info=error)

726

return True # Try again later

520

727

self.current_checker_command = command

521

try:

522

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

523

command, self.name)

524

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

525

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

526

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

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

except OSError as error:

542

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

543

error)

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

self.checker_callback, pipe[0], command)

544

753

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

545

754

return True

546

755

552

761

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

553

762

return

554

763

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

555

try:

556

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

557

#time.sleep(0.5)

558

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

559

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

560

except OSError as error:

561

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

562

raise

764

self.checker.terminate()

563

765

self.checker = None

564

766

565

def dbus_service_property(dbus_interface, signature="v",

566

access="readwrite", byte_arrays=False):

767

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

567

772

"""Decorators for marking methods of a DBusObjectWithProperties to

568

773

become properties on the D-Bus.

569

774

578

783

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

579

784

if byte_arrays and signature != "ay":

580

785

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

581

" signature %r" % signature)

786

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

787

582

788

def decorator(func):

583

789

func._dbus_is_property = True

584

790

func._dbus_interface = dbus_interface

589

795

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

590

796

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

591

797

return func

798

799

return decorator

800

801

802

def dbus_interface_annotations(dbus_interface):

803

"""Decorator for marking functions returning interface annotations

804

805

Usage:

806

807

@dbus_interface_annotations("org.example.Interface")

808

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

809

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

810

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

811

"false"}

812

"""

813

814

def decorator(func):

815

func._dbus_is_interface = True

816

func._dbus_interface = dbus_interface

817

func._dbus_name = dbus_interface

818

return func

819

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

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

825

Usage:

826

827

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

828

"org.freedesktop.DBus.Property."

829

"EmitsChangedSignal": "false"})

830

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

831

access="r")

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

836

def decorator(func):

837

func._dbus_annotations = annotations

838

return func

839

592

840

return decorator

593

841

594

842

595

843

class DBusPropertyException(dbus.exceptions.DBusException):

596

844

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

597

845

"""

598

def __unicode__(self):

599

return unicode(str(self))

846

pass

600

847

601

848

602

849

class DBusPropertyAccessException(DBusPropertyException):

613

860

614

861

class DBusObjectWithProperties(dbus.service.Object):

615

862

"""A D-Bus object with properties.

616

863

617

864

Classes inheriting from this can use the dbus_service_property

618

865

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

619

866

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

620

867

"""

621

868

622

869

@staticmethod

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

870

def _is_dbus_thing(thing):

871

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

872

873

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

874

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

875

"""

876

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

877

False)

625

878

626

def _get_all_dbus_properties(self):

879

def _get_all_dbus_things(self, thing):

627

880

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

628

881

"""

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

882

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

883

athing.__get__(self))

884

for cls in self.__class__.__mro__

885

for name, athing in

886

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

632

887

633

888

def _get_dbus_property(self, interface_name, property_name):

634

889

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

635

890

property with the specified name and interface.

636

891

"""

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

895

if (value._dbus_name == property_name

896

and value._dbus_interface == interface_name):

897

return value.__get__(self)

898

647

899

# No such property

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

+ interface_name + "."

650

+ property_name)

900

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

901

self.dbus_object_path, interface_name, property_name))

651

902

652

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

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

653

905

out_signature="v")

654

906

def Get(self, interface_name, property_name):

655

907

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

673

925

# The byte_arrays option is not supported yet on

674

926

# signatures other than "ay".

675

927

if prop._dbus_signature != "ay":

676

raise ValueError

677

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

678

for byte in value))

928

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

929

"'ay' signature {!r}"

930

.format(prop._dbus_signature))

931

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

932

for byte in value))

679

933

prop(value)

680

934

681

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

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

682

937

out_signature="a{sv}")

683

938

def GetAll(self, interface_name):

684

939

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

685

940

standard.

686

941

687

942

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

688

943

"""

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

944

properties = {}

945

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

691

946

if (interface_name

692

947

and interface_name != prop._dbus_interface):

693

948

# Interface non-empty but did not match

697

952

continue

698

953

value = prop()

699

954

if not hasattr(value, "variant_level"):

700

all[name] = value

955

properties[name] = value

701

956

continue

702

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

703

value.variant_level+1)

704

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

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

959

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

960

961

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

962

def PropertiesChanged(self, interface_name, changed_properties,

963

invalidated_properties):

964

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

965

standard.

966

"""

967

pass

705

968

706

969

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

970

out_signature="s",

708

971

path_keyword='object_path',

709

972

connection_keyword='connection')

710

973

def Introspect(self, object_path, connection):

711

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

974

"""Overloading of standard D-Bus method.

975

976

Inserts property tags and interface annotation tags.

712

977

"""

713

978

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

714

979

connection)

715

980

try:

716

981

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

982

717

983

def make_tag(document, name, prop):

718

984

e = document.createElement("property")

719

985

e.setAttribute("name", name)

720

986

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

721

987

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

722

988

return e

989

723

990

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

991

# Add property tags

724

992

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

725

993

for name, prop

726

in self._get_all_dbus_properties()

994

in self._get_all_dbus_things("property")

727

995

if prop._dbus_interface

728

996

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

729

997

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1021

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

1022

)).items():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

730

1027

# Add the names to the return values for the

731

1028

# "org.freedesktop.DBus.Properties" methods

732

1029

if (if_tag.getAttribute("name")

747

1044

except (AttributeError, xml.dom.DOMException,

748

1045

xml.parsers.expat.ExpatError) as error:

749

1046

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

750

error)

1047

exc_info=error)

751

1048

return xmlstring

752

1049

753

1050

1051

def datetime_to_dbus(dt, variant_level=0):

1052

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

1053

if dt is None:

1054

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

1055

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

1056

1057

1058

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

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

1060

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

1061

interface names according to the "alt_interface_names" mapping.

1062

Usage:

1063

1064

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

1065

"net.example.AlternateInterface"})

1066

class SampleDBusObject(dbus.service.Object):

1067

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

1068

def SampleDBusMethod():

1069

pass

1070

1071

The above "SampleDBusMethod" on "SampleDBusObject" will be

1072

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

1073

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

1074

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

1075

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

1076

1077

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

1078

(from DBusObjectWithProperties) and interfaces (from the

1079

dbus_interface_annotations decorator).

1080

"""

1081

1082

def wrapper(cls):

1083

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1085

attr = {}

1086

interface_names = set()

1087

# Go though all attributes of the class

1088

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

1089

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

1090

# with the wrong interface name

1091

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1094

continue

1095

# Create an alternate D-Bus interface name based on

1096

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1099

interface_names.add(alt_interface)

1100

# Is this a D-Bus signal?

1101

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

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1106

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1111

# Create a new, but exactly alike, function

1112

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

1113

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1131

# Copy annotations, if any

1132

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1135

except AttributeError:

1136

pass

1137

# Define a creator of a function to call both the

1138

# original and alternate functions, so both the

1139

# original and alternate signals gets sent when

1140

# the function is called

1141

def fixscope(func1, func2):

1142

"""This function is a scope container to pass

1143

func1 and func2 to the "call_both" function

1144

outside of its arguments"""

1145

1146

def call_both(*args, **kwargs):

1147

"""This function will emit two D-Bus

1148

signals by calling func1 and func2"""

1149

func1(*args, **kwargs)

1150

func2(*args, **kwargs)

1151

1152

return call_both

1153

# Create the "call_both" function and add it to

1154

# the class

1155

attr[attrname] = fixscope(attribute, new_function)

1156

# Is this a D-Bus method?

1157

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

1158

# Create a new, but exactly alike, function

1159

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

1160

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

1161

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1172

# Copy annotations, if any

1173

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1176

except AttributeError:

1177

pass

1178

# Is this a D-Bus property?

1179

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

1180

# Create a new, but exactly alike, function

1181

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

1182

# property with the alternate D-Bus interface

1183

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1195

# Copy annotations, if any

1196

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1199

except AttributeError:

1200

pass

1201

# Is this a D-Bus interface?

1202

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

1203

# Create a new, but exactly alike, function

1204

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

1205

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

1206

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1214

if deprecate:

1215

# Deprecate all alternate interfaces

1216

iname="_AlternateDBusNames_interface_annotation{}"

1217

for interface_name in interface_names:

1218

1219

@dbus_interface_annotations(interface_name)

1220

def func(self):

1221

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

1222

"true" }

1223

# Find an unused name

1224

for aname in (iname.format(i)

1225

for i in itertools.count()):

1226

if aname not in attr:

1227

attr[aname] = func

1228

break

1229

if interface_names:

1230

# Replace the class with a new subclass of it with

1231

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1234

return cls

1235

1236

return wrapper

1237

1238

1239

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

1240

"se.bsnet.fukt.Mandos"})

754

1241

class ClientDBus(Client, DBusObjectWithProperties):

755

1242

"""A Client class using D-Bus

756

1243

760

1247

"""

761

1248

762

1249

runtime_expansions = (Client.runtime_expansions

763

+ ("dbus_object_path",))

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

764

1253

765

1254

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

766

1255

767

1256

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

768

self._approvals_pending = 0

769

1257

self.bus = bus

770

1258

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

771

1259

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

772

1260

# the D-Bus

773

client_object_name = unicode(self.name).translate(

1261

client_object_name = str(self.name).translate(

774

1262

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

775

1263

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

776

self.dbus_object_path = (dbus.ObjectPath

777

("/clients/" + client_object_name))

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

778

1266

DBusObjectWithProperties.__init__(self, self.bus,

779

1267

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

1268

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1274

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

1275

its changes to DBus.

1276

1277

transform_fun: Function that takes a value and a variant_level

1278

and transforms it to a D-Bus type.

1279

dbus_name: D-Bus name of the variable

1280

type_func: Function that transform the value before sending it

1281

to the D-Bus. Default: no transform

1282

variant_level: D-Bus variant level. Default: 1

1283

"""

1284

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

1285

1286

def setter(self, value):

1287

if hasattr(self, "dbus_object_path"):

1288

if (not hasattr(self, attrname) or

1289

type_func(getattr(self, attrname, None))

1290

!= type_func(value)):

1291

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1295

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1299

self.PropertyChanged(dbus.String(dbus_name),

1300

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1306

setattr(self, attrname, value)

1307

1308

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

1309

1310

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1311

approvals_pending = notifychangeproperty(dbus.Boolean,

1312

"ApprovalPending",

1313

type_func = bool)

1314

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

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

"LastCheckedOK")

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1323

"LastCheckerStatus")

1324

last_approval_request = notifychangeproperty(

1325

datetime_to_dbus, "LastApprovalRequest")

1326

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1331

approval_duration = notifychangeproperty(

1332

dbus.UInt64, "ApprovalDuration",

1333

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

1334

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

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1338

extended_timeout = notifychangeproperty(

1339

dbus.UInt64, "ExtendedTimeout",

1340

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

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1344

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

1345

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

1346

invalidate_only=True)

1347

1348

del notifychangeproperty

836

1349

837

1350

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

838

1351

try:

843

1356

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

844

1357

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

845

1358

846

def checker_callback(self, pid, condition, command,

847

*args, **kwargs):

848

self.checker_callback_tag = None

849

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

if os.WIFEXITED(condition):

854

exitstatus = os.WEXITSTATUS(condition)

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

855

1366

# Emit D-Bus signal

856

1367

self.CheckerCompleted(dbus.Int16(exitstatus),

857

dbus.Int64(condition),

1368

dbus.Int64(0),

858

1369

dbus.String(command))

859

1370

else:

860

1371

# Emit D-Bus signal

861

1372

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

862

dbus.Int64(condition),

1373

dbus.Int64(

1374

self.last_checker_signal),

863

1375

dbus.String(command))

864

865

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

866

*args, **kwargs)

867

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

1376

return ret

884

1377

885

1378

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

886

old_checker = self.checker

887

if self.checker is not None:

888

old_checker_pid = self.checker.pid

889

else:

890

old_checker_pid = None

1379

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

891

1380

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

892

1381

# Only if new checker process was started

893

1382

if (self.checker is not None

894

1383

and old_checker_pid != self.checker.pid):

895

1384

# Emit D-Bus signal

896

1385

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1386

return r

901

1387

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1388

def _reset_approved(self):

912

self._approved = None

1389

self.approved = None

913

1390

return False

914

1391

915

1392

def approve(self, value=True):

1393

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

916

1396

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

919

(self.approval_duration),

920

self._reset_approved)

921

922

1397

923

1398

## D-Bus methods, signals & properties

924

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

1399

1400

## Interfaces

925

1401

926

1402

## Signals

927

1403

938

1414

pass

939

1415

940

1416

# PropertyChanged - signal

1417

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

941

1418

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

942

1419

def PropertyChanged(self, property, value):

943

1420

"D-Bus signal"

1007

1484

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

1008

1485

1009

1486

# ApprovedByDefault - property

1010

@dbus_service_property(_interface, signature="b",

1487

@dbus_service_property(_interface,

1488

signature="b",

1011

1489

access="readwrite")

1012

1490

def ApprovedByDefault_dbus_property(self, value=None):

1013

1491

if value is None: # get

1014

1492

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1493

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1494

1022

1495

# ApprovalDelay - property

1023

@dbus_service_property(_interface, signature="t",

1496

@dbus_service_property(_interface,

1497

signature="t",

1024

1498

access="readwrite")

1025

1499

def ApprovalDelay_dbus_property(self, value=None):

1026

1500

if value is None: # get

1027

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1501

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

1502

* 1000)

1029

1503

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1504

1035

1505

# ApprovalDuration - property

1036

@dbus_service_property(_interface, signature="t",

1506

@dbus_service_property(_interface,

1507

signature="t",

1037

1508

access="readwrite")

1038

1509

def ApprovalDuration_dbus_property(self, value=None):

1039

1510

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1041

self.approval_duration))

1042

old_value = self.approval_duration

1511

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

1512

* 1000)

1043

1513

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1514

1049

1515

# Name - property

1050

1516

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

1057

1523

return dbus.String(self.fingerprint)

1058

1524

1059

1525

# Host - property

1060

@dbus_service_property(_interface, signature="s",

1526

@dbus_service_property(_interface,

1527

signature="s",

1061

1528

access="readwrite")

1062

1529

def Host_dbus_property(self, value=None):

1063

1530

if value is None: # get

1064

1531

return dbus.String(self.host)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1532

self.host = str(value)

1071

1533

1072

1534

# Created - property

1073

1535

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

1074

1536

def Created_dbus_property(self):

1075

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

1537

return datetime_to_dbus(self.created)

1076

1538

1077

1539

# LastEnabled - property

1078

1540

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

1079

1541

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1542

return datetime_to_dbus(self.last_enabled)

1081

1543

1082

1544

# Enabled - property

1083

@dbus_service_property(_interface, signature="b",

1545

@dbus_service_property(_interface,

1546

signature="b",

1084

1547

access="readwrite")

1085

1548

def Enabled_dbus_property(self, value=None):

1086

1549

if value is None: # get

1091

1554

self.disable()

1092

1555

1093

1556

# LastCheckedOK - property

1094

@dbus_service_property(_interface, signature="s",

1557

@dbus_service_property(_interface,

1558

signature="s",

1095

1559

access="readwrite")

1096

1560

def LastCheckedOK_dbus_property(self, value=None):

1097

1561

if value is not None:

1098

1562

self.checked_ok()

1099

1563

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

1564

return datetime_to_dbus(self.last_checked_ok)

1565

1566

# LastCheckerStatus - property

1567

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

1568

def LastCheckerStatus_dbus_property(self):

1569

return dbus.Int16(self.last_checker_status)

1101

1570

1102

1571

# Expires - property

1103

1572

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

1104

1573

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

1574

return datetime_to_dbus(self.expires)

1106

1575

1107

1576

# LastApprovalRequest - property

1108

1577

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

1109

1578

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

1579

return datetime_to_dbus(self.last_approval_request)

1111

1580

1112

1581

# Timeout - property

1113

@dbus_service_property(_interface, signature="t",

1582

@dbus_service_property(_interface,

1583

signature="t",

1114

1584

access="readwrite")

1115

1585

def Timeout_dbus_property(self, value=None):

1116

1586

if value is None: # get

1117

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1587

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

1588

old_timeout = self.timeout

1119

1589

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1126

# Reschedule timeout

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

1590

# Reschedule disabling

1591

if self.enabled:

1592

now = datetime.datetime.utcnow()

1593

self.expires += self.timeout - old_timeout

1594

if self.expires <= now:

1595

# The timeout has passed

1596

self.disable()

1597

else:

1598

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

1599

is None):

1600

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1605

1145

1606

# ExtendedTimeout - property

1146

@dbus_service_property(_interface, signature="t",

1607

@dbus_service_property(_interface,

1608

signature="t",

1147

1609

access="readwrite")

1148

1610

def ExtendedTimeout_dbus_property(self, value=None):

1149

1611

if value is None: # get

1150

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1612

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

1613

* 1000)

1152

1614

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1615

1158

1616

# Interval - property

1159

@dbus_service_property(_interface, signature="t",

1617

@dbus_service_property(_interface,

1618

signature="t",

1160

1619

access="readwrite")

1161

1620

def Interval_dbus_property(self, value=None):

1162

1621

if value is None: # get

1163

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1622

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

1165

1623

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

1624

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

1171

1625

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

1626

if self.enabled:

1627

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1632

1178

1633

# Checker - property

1179

@dbus_service_property(_interface, signature="s",

1634

@dbus_service_property(_interface,

1635

signature="s",

1180

1636

access="readwrite")

1181

1637

def Checker_dbus_property(self, value=None):

1182

1638

if value is None: # get

1183

1639

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1640

self.checker_command = str(value)

1191

1641

1192

1642

# CheckerRunning - property

1193

@dbus_service_property(_interface, signature="b",

1643

@dbus_service_property(_interface,

1644

signature="b",

1194

1645

access="readwrite")

1195

1646

def CheckerRunning_dbus_property(self, value=None):

1196

1647

if value is None: # get

1206

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1207

1658

1208

1659

# Secret = property

1209

@dbus_service_property(_interface, signature="ay",

1210

access="write", byte_arrays=True)

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1211

1664

def Secret_dbus_property(self, value):

1212

self.secret = str(value)

1665

self.secret = bytes(value)

1213

1666

1214

1667

del _interface

1215

1668

1219

1672

self._pipe = child_pipe

1220

1673

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

1221

1674

if not self._pipe.recv():

1222

raise KeyError()

1223

1675

raise KeyError(fpr)

1676

1224

1677

def __getattribute__(self, name):

1225

if(name == '_pipe'):

1678

if name == '_pipe':

1226

1679

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

1227

1680

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

1228

1681

data = self._pipe.recv()

1229

1682

if data[0] == 'data':

1230

1683

return data[1]

1231

1684

if data[0] == 'function':

1685

1232

1686

def func(*args, **kwargs):

1233

1687

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

1234

1688

return self._pipe.recv()[1]

1689

1235

1690

return func

1236

1691

1237

1692

def __setattr__(self, name, value):

1238

if(name == '_pipe'):

1693

if name == '_pipe':

1239

1694

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

1240

1695

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

1241

1696

1249

1704

def handle(self):

1250

1705

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

1251

1706

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

1252

unicode(self.client_address))

1707

str(self.client_address))

1253

1708

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

1254

1709

self.server.child_pipe.fileno())

1255

1256

session = (gnutls.connection

1257

.ClientSession(self.request,

1258

gnutls.connection

1259

.X509Credentials()))

1260

1710

1711

session = gnutls.connection.ClientSession(

1712

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

1713

1261

1714

# Note: gnutls.connection.X509Credentials is really a

1262

1715

# generic GnuTLS certificate credentials object so long as

1263

1716

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

1264

1717

# here despite using OpenPGP certificates.

1265

1718

1266

1719

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

1267

1720

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

1268

1721

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

1271

1724

priority = self.server.gnutls_priority

1272

1725

if priority is None:

1273

1726

priority = "NORMAL"

1274

(gnutls.library.functions

1275

.gnutls_priority_set_direct(session._c_object,

1276

priority, None))

1277

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1729

1278

1730

# Start communication using the Mandos protocol

1279

1731

# Get protocol number

1280

1732

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

1281

1733

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

1282

1734

try:

1283

1735

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

1284

raise RuntimeError

1736

raise RuntimeError(line)

1285

1737

except (ValueError, IndexError, RuntimeError) as error:

1286

1738

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

1287

1739

return

1288

1740

1289

1741

# Start GnuTLS connection

1290

1742

try:

1291

1743

session.handshake()

1295

1747

# established. Just abandon the request.

1296

1748

return

1297

1749

logger.debug("Handshake succeeded")

1298

1750

1299

1751

approval_required = False

1300

1752

try:

1301

1753

try:

1302

fpr = self.fingerprint(self.peer_certificate

1303

(session))

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1304

1756

except (TypeError,

1305

1757

gnutls.errors.GNUTLSError) as error:

1306

1758

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

1307

1759

return

1308

1760

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

1309

1761

1310

1762

try:

1311

1763

client = ProxyClient(child_pipe, fpr,

1312

1764

self.client_address)

1321

1773

while True:

1322

1774

if not client.enabled:

1323

1775

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

1324

client.name)

1776

client.name)

1325

1777

if self.server.use_dbus:

1326

1778

# Emit D-Bus signal

1327

client.Rejected("Disabled")

1779

client.Rejected("Disabled")

1328

1780

return

1329

1781

1330

if client._approved or not client.approval_delay:

1782

if client.approved or not client.approval_delay:

1331

1783

#We are approved or approval is disabled

1332

1784

break

1333

elif client._approved is None:

1785

elif client.approved is None:

1334

1786

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

1335

1787

client.name)

1336

1788

if self.server.use_dbus:

1337

1789

# Emit D-Bus signal

1338

1790

client.NeedApproval(

1339

client.approval_delay_milliseconds(),

1340

client.approved_by_default)

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1341

1793

else:

1342

1794

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

1343

1795

client.name)

1347

1799

return

1348

1800

1349

1801

#wait until timeout or approved

1350

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

1351

1802

time = datetime.datetime.now()

1352

1803

client.changedstate.acquire()

1353

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

1804

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

1354

1805

client.changedstate.release()

1355

1806

time2 = datetime.datetime.now()

1356

1807

if (time2 - time) >= delay:

1372

1823

try:

1373

1824

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

1374

1825

except gnutls.errors.GNUTLSError as error:

1375

logger.warning("gnutls send failed")

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1376

1828

return

1377

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

1378

sent, len(client.secret)

1379

- (sent_size + sent))

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1380

1832

sent_size += sent

1381

1833

1382

1834

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

1383

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

1835

# bump the timeout using extended_timeout

1836

client.bump_timeout(client.extended_timeout)

1385

1837

if self.server.use_dbus:

1386

1838

# Emit D-Bus signal

1387

1839

client.GotSecret()

1392

1844

try:

1393

1845

session.bye()

1394

1846

except gnutls.errors.GNUTLSError as error:

1395

logger.warning("GnuTLS bye failed")

1847

logger.warning("GnuTLS bye failed",

1848

exc_info=error)

1396

1849

1397

1850

@staticmethod

1398

1851

def peer_certificate(session):

1399

1852

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

1400

1853

# If not an OpenPGP certificate...

1401

if (gnutls.library.functions

1402

.gnutls_certificate_type_get(session._c_object)

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1403

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1404

1857

# ...do the normal thing

1405

1858

return session.peer_certificate

1419

1872

def fingerprint(openpgp):

1420

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1421

1874

# New GnuTLS "datum" with the OpenPGP public key

1422

datum = (gnutls.library.types

1423

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

1424

ctypes.POINTER

1425

(ctypes.c_ubyte)),

1426

ctypes.c_uint(len(openpgp))))

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1427

1879

# New empty GnuTLS certificate

1428

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1429

(gnutls.library.functions

1430

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1431

1883

# Import the OpenPGP public key into the certificate

1432

(gnutls.library.functions

1433

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

1434

gnutls.library.constants

1435

.GNUTLS_OPENPGP_FMT_RAW))

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1436

1887

# Verify the self signature in the key

1437

1888

crtverify = ctypes.c_uint()

1438

(gnutls.library.functions

1439

.gnutls_openpgp_crt_verify_self(crt, 0,

1440

ctypes.byref(crtverify)))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1441

1891

if crtverify.value != 0:

1442

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1443

raise (gnutls.errors.CertificateSecurityError

1444

("Verify failed"))

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1445

1895

# New buffer for the fingerprint

1446

1896

buf = ctypes.create_string_buffer(20)

1447

1897

buf_len = ctypes.c_size_t()

1448

1898

# Get the fingerprint from the certificate into the buffer

1449

(gnutls.library.functions

1450

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

1451

ctypes.byref(buf_len)))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1452

1901

# Deinit the certificate

1453

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1454

1903

# Convert the buffer to a Python bytestring

1455

1904

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

1456

1905

# Convert the bytestring to hexadecimal notation

1457

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

1906

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

1458

1907

return hex_fpr

1459

1908

1460

1909

1461

1910

class MultiprocessingMixIn(object):

1462

1911

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

1912

1463

1913

def sub_process_main(self, request, address):

1464

1914

try:

1465

1915

self.finish_request(request, address)

1466

except:

1916

except Exception:

1467

1917

self.handle_error(request, address)

1468

1918

self.close_request(request)

1469

1919

1470

1920

def process_request(self, request, address):

1471

1921

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

1922

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

1923

args = (request, address))

1924

proc.start()

1925

return proc

1926

1474

1927

1475

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

1929

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

1930

1477

1931

def process_request(self, request, client_address):

1478

1932

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

1479

1933

1480

1934

This function creates a new pipe in self.pipe

1481

1935

"""

1482

1936

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

1937

1938

proc = MultiprocessingMixIn.process_request(self, request,

1939

client_address)

1486

1940

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

1941

self.add_pipe(parent_pipe, proc)

1942

1943

def add_pipe(self, parent_pipe, proc):

1490

1944

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

1491

raise NotImplementedError

1945

raise NotImplementedError()

1946

1492

1947

1493

1948

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

1949

socketserver.TCPServer, object):

1499

1954

interface: None or a network interface name (string)

1500

1955

use_ipv6: Boolean; to use IPv6 or not

1501

1956

"""

1957

1502

1958

def __init__(self, server_address, RequestHandlerClass,

1503

interface=None, use_ipv6=True):

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1962

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

1963

creating a new one with socket.socket().

1964

"""

1504

1965

self.interface = interface

1505

1966

if use_ipv6:

1506

1967

self.address_family = socket.AF_INET6

1968

if socketfd is not None:

1969

# Save the file descriptor

1970

self.socketfd = socketfd

1971

# Save the original socket.socket() function

1972

self.socket_socket = socket.socket

1973

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

1974

#

1975

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

1976

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

1977

# patching socket.socket.)

1978

#

1979

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

1980

@functools.wraps(socket.socket)

1981

def socket_wrapper(*args, **kwargs):

1982

# Restore original function so subsequent calls are

1983

# not affected.

1984

socket.socket = self.socket_socket

1985

del self.socket_socket

1986

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

1987

# saved file descriptor.

1988

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

1989

# Replace socket.socket() function with wrapper

1990

socket.socket = socket_wrapper

1991

# The socketserver.TCPServer.__init__ will call

1992

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

1993

# socket_wrapper(), if socketfd was set.

1507

1994

socketserver.TCPServer.__init__(self, server_address,

1508

1995

RequestHandlerClass)

1996

1509

1997

def server_bind(self):

1510

1998

"""This overrides the normal server_bind() function

1511

1999

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

1517

2005

self.interface)

1518

2006

else:

1519

2007

try:

1520

self.socket.setsockopt(socket.SOL_SOCKET,

1521

SO_BINDTODEVICE,

1522

str(self.interface

1523

+ '\0'))

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1524

2011

except socket.error as error:

1525

if error[0] == errno.EPERM:

1526

logger.error("No permission to"

1527

" bind to interface %s",

1528

self.interface)

1529

elif error[0] == errno.ENOPROTOOPT:

2012

if error.errno == errno.EPERM:

2013

logger.error("No permission to bind to"

2014

" interface %s", self.interface)

2015

elif error.errno == errno.ENOPROTOOPT:

1530

2016

logger.error("SO_BINDTODEVICE not available;"

1531

2017

" cannot bind to interface %s",

1532

2018

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

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

2021

" cannot bind", self.interface)

1533

2022

else:

1534

2023

raise

1535

2024

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

1538

2027

if self.address_family == socket.AF_INET6:

1539

2028

any_address = "::" # in6addr_any

1540

2029

else:

1541

any_address = socket.INADDR_ANY

2030

any_address = "0.0.0.0" # INADDR_ANY

1542

2031

self.server_address = (any_address,

1543

2032

self.server_address[1])

1544

2033

elif not self.server_address[1]:

1545

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

1546

0)

2034

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

1547

2035

# if self.interface:

1548

2036

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

1549

2037

# 0, # port

1563

2051

1564

2052

Assumes a gobject.MainLoop event loop.

1565

2053

"""

2054

1566

2055

def __init__(self, server_address, RequestHandlerClass,

1567

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

1568

gnutls_priority=None, use_dbus=True):

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

1569

2062

self.enabled = False

1570

2063

self.clients = clients

1571

2064

if self.clients is None:

1572

self.clients = set()

2065

self.clients = {}

1573

2066

self.use_dbus = use_dbus

1574

2067

self.gnutls_priority = gnutls_priority

1575

2068

IPv6_TCPServer.__init__(self, server_address,

1576

2069

RequestHandlerClass,

1577

2070

interface = interface,

1578

use_ipv6 = use_ipv6)

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

1579

2074

def server_activate(self):

1580

2075

if self.enabled:

1581

2076

return socketserver.TCPServer.server_activate(self)

2077

1582

2078

def enable(self):

1583

2079

self.enabled = True

1584

def add_pipe(self, parent_pipe):

2080

2081

def add_pipe(self, parent_pipe, proc):

1585

2082

# Call "handle_ipc" for both data and EOF events

1586

gobject.io_add_watch(parent_pipe.fileno(),

1587

gobject.IO_IN | gobject.IO_HUP,

1588

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

1591

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

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2089

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

1592

2093

client_object=None):

1593

condition_names = {

1594

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

1595

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

1596

# blocking).

1597

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

1598

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

1599

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

1600

# broken, usually for pipes and

1601

# sockets).

1602

}

1603

conditions_string = ' | '.join(name

1604

for cond, name in

1605

condition_names.iteritems()

1606

if cond & condition)

1607

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

1608

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

2094

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

2095

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

2096

# Wait for other process to exit

2097

proc.join()

1609

2098

return False

1610

2099

1611

2100

# Read a request from the child

1616

2105

fpr = request[1]

1617

2106

address = request[2]

1618

2107

1619

for c in self.clients:

2108

for c in self.clients.itervalues():

1620

2109

if c.fingerprint == fpr:

1621

2110

client = c

1622

2111

break

1625

2114

"dress: %s", fpr, address)

1626

2115

if self.use_dbus:

1627

2116

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

2117

mandos_dbus_service.ClientNotFound(fpr,

2118

address[0])

1629

2119

parent_pipe.send(False)

1630

2120

return False

1631

2121

1632

gobject.io_add_watch(parent_pipe.fileno(),

1633

gobject.IO_IN | gobject.IO_HUP,

1634

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

1637

2129

parent_pipe.send(True)

1638

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

2130

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

2131

# same fileno

1639

2132

return False

1640

2133

if command == 'funcall':

1641

2134

funcname = request[1]

1642

2135

args = request[2]

1643

2136

kwargs = request[3]

1644

2137

1645

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

1646

2138

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

2139

funcname)(*args,

2140

**kwargs)))

2141

1647

2142

if command == 'getattr':

1648

2143

attrname = request[1]

1649

if callable(client_object.__getattribute__(attrname)):

1650

parent_pipe.send(('function',))

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

1651

2147

else:

1652

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

2148

parent_pipe.send((

2149

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

1653

2150

1654

2151

if command == 'setattr':

1655

2152

attrname = request[1]

1656

2153

value = request[2]

1657

2154

setattr(client_object, attrname, value)

1658

2155

1659

2156

return True

1660

2157

1661

2158

2159

def rfc3339_duration_to_delta(duration):

2160

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

2161

2162

>>> rfc3339_duration_to_delta("P7D")

2163

datetime.timedelta(7)

2164

>>> rfc3339_duration_to_delta("PT60S")

2165

datetime.timedelta(0, 60)

2166

>>> rfc3339_duration_to_delta("PT60M")

2167

datetime.timedelta(0, 3600)

2168

>>> rfc3339_duration_to_delta("PT24H")

2169

datetime.timedelta(1)

2170

>>> rfc3339_duration_to_delta("P1W")

2171

datetime.timedelta(7)

2172

>>> rfc3339_duration_to_delta("PT5M30S")

2173

datetime.timedelta(0, 330)

2174

>>> rfc3339_duration_to_delta("P1DT3M20S")

2175

datetime.timedelta(1, 200)

2176

"""

2177

2178

# Parsing an RFC 3339 duration with regular expressions is not

2179

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

2180

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

2181

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

2182

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

2183

# avoid excessive use of external libraries.

2184

2185

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2191

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

2192

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

2193

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

2194

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

2195

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2197

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

2198

datetime.timedelta(minutes=1),

2199

frozenset((token_second, token_end)))

2200

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

2201

datetime.timedelta(hours=1),

2202

frozenset((token_minute, token_end)))

2203

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

2204

None,

2205

frozenset((token_hour, token_minute,

2206

token_second)))

2207

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

2208

datetime.timedelta(days=1),

2209

frozenset((token_time, token_end)))

2210

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

2211

datetime.timedelta(weeks=4),

2212

frozenset((token_day, token_end)))

2213

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

2214

datetime.timedelta(weeks=52),

2215

frozenset((token_month, token_end)))

2216

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

2217

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2219

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

2220

frozenset((token_year, token_month,

2221

token_day, token_time,

2222

token_week)))

2223

# Define starting values

2224

value = datetime.timedelta() # Value so far

2225

found_token = None

2226

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

2227

s = duration # String left to parse

2228

# Loop until end token is found

2229

while found_token is not token_end:

2230

# Search for any currently valid tokens

2231

for token in followers:

2232

match = token.regexp.match(s)

2233

if match is not None:

2234

# Token found

2235

if token.value is not None:

2236

# Value found, parse digits

2237

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

2238

# Add to value so far

2239

value += factor * token.value

2240

# Strip token from string

2241

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

2242

# Go to found token

2243

found_token = token

2244

# Set valid next tokens

2245

followers = found_token.followers

2246

break

2247

else:

2248

# No currently valid tokens were found

2249

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

2250

.format(duration))

2251

# End token found

2252

return value

2253

2254

1662

2255

def string_to_delta(interval):

1663

2256

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

1664

2257

1675

2268

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

1676

2269

datetime.timedelta(0, 330)

1677

2270

"""

2271

2272

try:

2273

return rfc3339_duration_to_delta(interval)

2274

except ValueError:

2275

pass

2276

1678

2277

timevalue = datetime.timedelta(0)

1679

2278

for s in interval.split():

1680

2279

try:

1681

suffix = unicode(s[-1])

2280

suffix = s[-1]

1682

2281

value = int(s[:-1])

1683

2282

if suffix == "d":

1684

2283

delta = datetime.timedelta(value)

1691

2290

elif suffix == "w":

1692

2291

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

1693

2292

else:

1694

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

1695

except (ValueError, IndexError) as e:

2293

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

2294

except IndexError as e:

1696

2295

raise ValueError(*(e.args))

1697

2296

timevalue += delta

1698

2297

return timevalue

1699

2298

1700

2299

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

2300

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

1726

2301

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

1727

2302

1735

2310

sys.exit()

1736

2311

if not noclose:

1737

2312

# Close all standard open file descriptors

1738

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

2313

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

1739

2314

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

1740

2315

raise OSError(errno.ENODEV,

1741

"%s not a character device"

1742

% os.path.devnull)

2316

"{} not a character device"

2317

.format(os.devnull))

1743

2318

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

1744

2319

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

1745

2320

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

1754

2329

1755

2330

parser = argparse.ArgumentParser()

1756

2331

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

1757

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

2332

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

1758

2333

help="show version number and exit")

1759

2334

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

1760

2335

help="Bind to interface IF")

1766

2341

help="Run self-test")

1767

2342

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

1768

2343

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

1769

" to terminal")

2344

" to terminal", default=None)

1770

2345

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

1771

2346

help="Debug level for stdout output")

1772

2347

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

1779

2354

" files")

1780

2355

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

1781

2356

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

1782

" system bus interface")

2357

" system bus interface", default=None)

1783

2358

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

1784

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

2359

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

2360

default=None)

2361

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

2362

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

2363

" state", default=None)

2364

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

2365

help="Specify a file descriptor to a network"

2366

" socket to use instead of creating one")

2367

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

2368

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

2369

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

2370

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

2371

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

2372

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

2373

default=None)

2374

1785

2375

options = parser.parse_args()

1786

2376

1787

2377

if options.check:

1788

2378

import doctest

1789

doctest.testmod()

1790

sys.exit()

2379

fail_count, test_count = doctest.testmod()

2380

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

1791

2381

1792

2382

# Default values for config file for server-global settings

1793

2383

server_defaults = { "interface": "",

1795

2385

"port": "",

1796

2386

"debug": "False",

1797

2387

"priority":

1798

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

2388

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

2389

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

1799

2390

"servicename": "Mandos",

1800

2391

"use_dbus": "True",

1801

2392

"use_ipv6": "True",

1802

2393

"debuglevel": "",

1803

}

2394

"restore": "True",

2395

"socket": "",

2396

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

2397

"foreground": "False",

2398

"zeroconf": "True",

2399

}

1804

2400

1805

2401

# Parse config file for server-global settings

1806

2402

server_config = configparser.SafeConfigParser(server_defaults)

1807

2403

del server_defaults

1808

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

1809

"mandos.conf"))

2404

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

1810

2405

# Convert the SafeConfigParser object to a dict

1811

2406

server_settings = server_config.defaults()

1812

2407

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

1813

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

2408

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

1814

2409

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

1815

2410

option)

1816

2411

if server_settings["port"]:

1817

2412

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

1818

2413

"port")

2414

if server_settings["socket"]:

2415

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

2416

"socket")

2417

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

2418

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

2419

# happen with a supplied network socket.

2420

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

2421

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

2422

["socket"])

1819

2423

del server_config

1820

2424

1821

2425

# Override the settings from the config file with command line

1822

2426

# options, if set.

1823

2427

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

1824

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

1825

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

2428

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

2429

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

2430

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

1826

2431

value = getattr(options, option)

1827

2432

if value is not None:

1828

2433

server_settings[option] = value

1829

2434

del options

1830

2435

# Force all strings to be unicode

1831

2436

for option in server_settings.keys():

1832

if type(server_settings[option]) is str:

1833

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

2437

if isinstance(server_settings[option], bytes):

2438

server_settings[option] = (server_settings[option]

2439

.decode("utf-8"))

2440

# Force all boolean options to be boolean

2441

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

2442

"foreground", "zeroconf"):

2443

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

2444

# Debug implies foreground

2445

if server_settings["debug"]:

2446

server_settings["foreground"] = True

1834

2447

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

1835

2448

1836

2449

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

1837

2450

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

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

2454

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

2455

1838

2456

# For convenience

1839

2457

debug = server_settings["debug"]

1840

2458

debuglevel = server_settings["debuglevel"]

1841

2459

use_dbus = server_settings["use_dbus"]

1842

2460

use_ipv6 = server_settings["use_ipv6"]

1843

2461

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

2462

stored_state_file)

2463

foreground = server_settings["foreground"]

2464

zeroconf = server_settings["zeroconf"]

2465

2466

if debug:

2467

initlogger(debug, logging.DEBUG)

2468

else:

2469

if not debuglevel:

2470

initlogger(debug)

2471

else:

2472

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

2473

initlogger(debug, level)

2474

1844

2475

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

1845

syslogger.setFormatter(logging.Formatter

1846

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

1847

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

1848

% server_settings["servicename"]))

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

1849

2480

1850

2481

# Parse config file with clients

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2482

client_config = configparser.SafeConfigParser(Client

2483

.client_defaults)

1860

2484

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

1861

2485

"clients.conf"))

1862

2486

1863

2487

global mandos_dbus_service

1864

2488

mandos_dbus_service = None

1865

2489

1866

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

1867

server_settings["port"]),

1868

ClientHandler,

1869

interface=(server_settings["interface"]

1870

or None),

1871

use_ipv6=use_ipv6,

1872

gnutls_priority=

1873

server_settings["priority"],

1874

use_dbus=use_dbus)

1875

if not debug:

1876

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

2490

socketfd = None

2491

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

2492

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

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

2495

ClientHandler,

2496

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

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2501

if not foreground:

2502

pidfilename = "/run/mandos.pid"

2503

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

2504

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

2505

pidfile = None

1877

2506

try:

1878

pidfile = open(pidfilename, "w")

1879

except IOError:

1880

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

2507

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

2508

except IOError as e:

2509

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

2510

exc_info=e)

1881

2511

1882

try:

1883

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

1884

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

1885

except KeyError:

2512

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

1886

2513

try:

1887

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

1888

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

2514

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

2516

break

1889

2517

except KeyError:

1890

try:

1891

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

1892

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

1893

except KeyError:

1894

uid = 65534

1895

gid = 65534

2518

continue

2519

else:

2520

uid = 65534

2521

gid = 65534

1896

2522

try:

1897

2523

os.setgid(gid)

1898

2524

os.setuid(uid)

1899

2525

except OSError as error:

1900

if error[0] != errno.EPERM:

1901

raise error

2526

if error.errno != errno.EPERM:

2527

raise

1902

2528

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2529

if debug:

1912

2530

# Enable all possible GnuTLS debugging

1913

2531

1919

2537

def debug_gnutls(level, string):

1920

2538

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

1921

2539

1922

(gnutls.library.functions

1923

.gnutls_global_set_log_function(debug_gnutls))

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

1924

2542

1925

2543

# Redirect stdin so all checkers get /dev/null

1926

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

2544

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

1927

2545

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

1928

2546

if null > 2:

1929

2547

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

1933

2548

1934

2549

# Need to fork before connecting to D-Bus

1935

if not debug:

2550

if not foreground:

1936

2551

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

1937

2552

daemon()

1938

2553

2554

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

2555

# need to inform gobject that threads will be used.

2556

gobject.threads_init()

2557

1939

2558

global main_loop

1940

2559

# From the Avahi example code

1941

DBusGMainLoop(set_as_default=True )

2560

DBusGMainLoop(set_as_default=True)

1942

2561

main_loop = gobject.MainLoop()

1943

2562

bus = dbus.SystemBus()

1944

2563

# End of Avahi example code

1945

2564

if use_dbus:

1946

2565

try:

1947

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

1948

bus, do_not_queue=True)

1949

except dbus.exceptions.NameExistsException as e:

1950

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

2566

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

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

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

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2573

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

1951

2574

use_dbus = False

1952

2575

server_settings["use_dbus"] = False

1953

2576

tcp_server.use_dbus = False

1954

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

1958

if server_settings["interface"]:

1959

service.interface = (if_nametoindex

1960

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

2577

if zeroconf:

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2584

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

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

1961

2587

1962

2588

global multiprocessing_manager

1963

2589

multiprocessing_manager = multiprocessing.Manager()

1965

2591

client_class = Client

1966

2592

if use_dbus:

1967

2593

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

2594

2595

client_settings = Client.config_parser(client_config)

2596

old_client_settings = {}

2597

clients_data = {}

2598

2599

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

2600

global wnull

2601

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

2602

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

2603

# mode

2604

if debug or not foreground:

2605

wnull.close()

2606

2607

# Get client data and settings from last running state.

2608

if server_settings["restore"]:

2609

try:

2610

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2613

os.remove(stored_state_path)

2614

except IOError as e:

2615

if e.errno == errno.ENOENT:

2616

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

2617

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

2618

else:

2619

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

2620

exc_info=e)

2621

raise

2622

except EOFError as e:

2623

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

2624

"EOFError:",

2625

exc_info=e)

2626

2627

with PGPEngine() as pgp:

2628

for client_name, client in clients_data.items():

2629

# Skip removed clients

2630

if client_name not in client_settings:

2631

continue

2632

2633

# Decide which value to use after restoring saved state.

2634

# We have three different values: Old config file,

2635

# new config file, and saved state.

2636

# New config value takes precedence if it differs from old

2637

# config value, otherwise use saved state.

2638

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

2639

try:

2640

# For each value in new config, check if it

2641

# differs from the old config value (Except for

2642

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2646

client[name] = value

2647

except KeyError:

2648

pass

2649

2650

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2652

# whose checker succeeded before we stored its state is

2653

# assumed to have successfully run all checkers during

2654

# downtime.

2655

if client["enabled"]:

2656

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

2657

if not client["last_checked_ok"]:

2658

logger.warning(

2659

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2662

client["enabled"] = False

2663

elif client["last_checker_status"] != 0:

2664

logger.warning(

2665

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2670

client["enabled"] = False

2671

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2675

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

1975

2678

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

for section in client_config.sections()))

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2682

except PGPError:

2683

# If decryption fails, we use secret from new settings

2684

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

2685

client_name))

2686

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

2687

["secret"])

2688

2689

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

2690

for client_name in (set(old_client_settings)

2691

- set(client_settings)):

2692

del clients_data[client_name]

2693

for client_name in (set(client_settings)

2694

- set(old_client_settings)):

2695

clients_data[client_name] = client_settings[client_name]

2696

2697

# Create all client objects

2698

for client_name, client in clients_data.items():

2699

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2702

server_settings = server_settings)

2703

1985

2704

if not tcp_server.clients:

1986

2705

logger.warning("No clients defined")

1987

1988

if not debug:

1989

try:

1990

with pidfile:

1991

pid = os.getpid()

1992

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

1993

del pidfile

1994

except IOError:

1995

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

1996

pidfilename, pid)

1997

except NameError:

1998

# "pidfile" was never created

1999

pass

2706

2707

if not foreground:

2708

if pidfile is not None:

2709

pid = os.getpid()

2710

try:

2711

with pidfile:

2712

print(pid, file=pidfile)

2713

except IOError:

2714

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

2715

pidfilename, pid)

2716

del pidfile

2000

2717

del pidfilename

2001

2002

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

2003

2718

2004

2719

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

2005

2720

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

2006

2721

2007

2722

if use_dbus:

2008

class MandosDBusService(dbus.service.Object):

2723

2724

@alternate_dbus_interfaces(

2725

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

2726

class MandosDBusService(DBusObjectWithProperties):

2009

2727

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

2728

2010

2729

def __init__(self):

2011

2730

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

2012

_interface = "se.bsnet.fukt.Mandos"

2731

2732

_interface = "se.recompile.Mandos"

2733

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

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

2738

"false" }

2013

2739

2014

2740

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

2015

2741

def ClientAdded(self, objpath):

2029

2755

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

2030

2756

def GetAllClients(self):

2031

2757

"D-Bus method"

2032

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

2758

return dbus.Array(c.dbus_object_path for c in

2759

tcp_server.clients.itervalues())

2034

2760

2035

2761

@dbus.service.method(_interface,

2036

2762

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

2037

2763

def GetAllClientsWithProperties(self):

2038

2764

"D-Bus method"

2039

2765

return dbus.Dictionary(

2040

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

2041

for c in tcp_server.clients),

2766

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

2767

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

2042

2768

signature="oa{sv}")

2043

2769

2044

2770

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

2045

2771

def RemoveClient(self, object_path):

2046

2772

"D-Bus method"

2047

for c in tcp_server.clients:

2773

for c in tcp_server.clients.itervalues():

2048

2774

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

2775

del tcp_server.clients[c.name]

2050

2776

c.remove_from_connection()

2051

2777

# Don't signal anything except ClientRemoved

2052

2778

c.disable(quiet=True)

2061

2787

2062

2788

def cleanup():

2063

2789

"Cleanup function; run on exit"

2064

service.cleanup()

2065

2790

if zeroconf:

2791

service.cleanup()

2792

2793

multiprocessing.active_children()

2794

wnull.close()

2795

if not (tcp_server.clients or client_settings):

2796

return

2797

2798

# Store client before exiting. Secrets are encrypted with key

2799

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

2800

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

2801

clients = {}

2802

with PGPEngine() as pgp:

2803

for client in tcp_server.clients.itervalues():

2804

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

2805

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

2806

key)

2807

client_dict = {}

2808

2809

# A list of attributes that can not be pickled

2810

# + secret.

2811

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

2812

"checker", "server_settings" }

2813

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

2814

.Object):

2815

exclude.add(name)

2816

2817

client_dict["encrypted_secret"] = (client

2818

.encrypted_secret)

2819

for attr in client.client_structure:

2820

if attr not in exclude:

2821

client_dict[attr] = getattr(client, attr)

2822

2823

clients[client.name] = client_dict

2824

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

2825

2826

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2833

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

2834

tempname = stored_state.name

2835

os.rename(tempname, stored_state_path)

2836

except (IOError, OSError) as e:

2837

if not debug:

2838

try:

2839

os.remove(tempname)

2840

except NameError:

2841

pass

2842

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

2843

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

2844

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

2845

else:

2846

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

2847

exc_info=e)

2848

raise

2849

2850

# Delete all clients, and settings from config

2066

2851

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

2852

name, client = tcp_server.clients.popitem()

2068

2853

if use_dbus:

2069

2854

client.remove_from_connection()

2070

client.disable_hook = None

2071

2855

# Don't signal anything except ClientRemoved

2072

2856

client.disable(quiet=True)

2073

2857

if use_dbus:

2074

2858

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2076

client.name)

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2861

client_settings.clear()

2077

2862

2078

2863

atexit.register(cleanup)

2079

2864

2080

for client in tcp_server.clients:

2865

for client in tcp_server.clients.itervalues():

2081

2866

if use_dbus:

2082

2867

# Emit D-Bus signal

2083

2868

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

2869

# Need to initiate checking of clients

2870

if client.enabled:

2871

client.init_checker()

2085

2872

2086

2873

tcp_server.enable()

2087

2874

tcp_server.server_activate()

2088

2875

2089

2876

# Find out what port we got

2090

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

2877

if zeroconf:

2878

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

2091

2879

if use_ipv6:

2092

2880

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

2093

" flowinfo %d, scope_id %d"

2094

% tcp_server.socket.getsockname())

2881

" flowinfo %d, scope_id %d",

2882

*tcp_server.socket.getsockname())

2095

2883

else: # IPv4

2096

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

2097

% tcp_server.socket.getsockname())

2884

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

2885

*tcp_server.socket.getsockname())

2098

2886

2099

2887

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

2100

2888

2101

2889

try:

2102

# From the Avahi example code

2103

try:

2104

service.activate()

2105

except dbus.exceptions.DBusException as error:

2106

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

2107

cleanup()

2108

sys.exit(1)

2109

# End of Avahi example code

2890

if zeroconf:

2891

# From the Avahi example code

2892

try:

2893

service.activate()

2894

except dbus.exceptions.DBusException as error:

2895

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

2896

cleanup()

2897

sys.exit(1)

2898

# End of Avahi example code

2110

2899

2111

2900

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

2112

2901

lambda *args, **kwargs:

2116

2905

logger.debug("Starting main loop")

2117

2906

main_loop.run()

2118

2907

except AvahiError as error:

2119

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

2908

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

2120

2909

cleanup()

2121

2910

sys.exit(1)

2122

2911

except KeyboardInterrupt:

2127

2916

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

2128

2917

cleanup()

2129

2918

2919

2130

2920

if __name__ == '__main__':

2131

2921

main()