/mandos/trunk : revision 474

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#!/usr/bin/python2.7

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#!/usr/bin/python

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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@recompile.se>.

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# Contact the authors at <mandos@fukt.bsnet.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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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 SocketServer as 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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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 ConfigParser as 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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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 cPickle as 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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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 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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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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version = "1.3.0"

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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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class AvahiError(Exception):

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

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self.value = value

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

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**kwargs)

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

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

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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,

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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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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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self.interface = interface

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self.name = name

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self.type = servicetype

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self.group = None # our entry group

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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, remove=True):

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def rename(self):

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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 = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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

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self.name)

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if remove:

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self.remove()

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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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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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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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except dbus.exceptions.DBusException, 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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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.remove()

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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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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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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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self.group.connect_to_signal('StateChanged',

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self

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.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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str(error))

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

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212

unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(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()

375

except (dbus.exceptions.UnknownMethodException,

376

dbus.exceptions.DBusException):

377

pass

218

self.group.Free()

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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):

220

def server_state_changed(self, state):

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

383

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

384

bad_states = {

385

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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}

390

if state in bad_states:

391

if bad_states[state] is not None:

392

if error is None:

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logger.error(bad_states[state])

394

else:

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

396

self.cleanup()

223

if state == avahi.SERVER_COLLISION:

224

logger.error("Zeroconf server name collision")

225

self.remove()

397

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elif state == avahi.SERVER_RUNNING:

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self.add()

399

else:

400

if error is None:

401

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

402

else:

403

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

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405

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def activate(self):

406

229

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

407

230

if self.server is None:

408

231

self.server = dbus.Interface(

409

232

self.bus.get_object(avahi.DBUS_NAME,

410

avahi.DBUS_PATH_SERVER,

411

follow_name_owner_changes=True),

233

avahi.DBUS_PATH_SERVER),

412

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avahi.DBUS_INTERFACE_SERVER)

413

235

self.server.connect_to_signal("StateChanged",

414

self.server_state_changed)

236

self.server_state_changed)

415

237

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

416

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417

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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

437

240

class Client(object):

438

241

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

439

242

440

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Attributes:

441

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

244

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

442

245

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

443

246

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

444

247

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

451

254

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

452

255

checker_initiator_tag: a gobject event source tag, or None

453

256

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

456

257

current_checker_command: string; current running checker_command

258

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

457

259

disable_initiator_tag: a gobject event source tag, or None

458

260

enabled: bool()

459

261

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

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264

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

463

265

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

464

266

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

465

last_checker_status: integer between 0 and 255 reflecting exit

466

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

267

last_enabled: datetime.datetime(); (UTC)

471

268

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

472

269

D-Bus identifiers

473

270

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

474

271

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

475

272

until this client is disabled

476

extended_timeout: extra long timeout when secret has been sent

477

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runtime_expansions: Allowed attributes for runtime expansion.

478

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

479

disabled, or None

480

server_settings: The server_settings dict from main()

481

274

"""

482

275

483

276

runtime_expansions = ("approval_delay", "approval_duration",

484

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

485

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

486

"last_approval_request", "last_checked_ok",

277

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

278

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

487

279

"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

}

499

280

500

281

@staticmethod

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):

282

def _timedelta_to_milliseconds(td):

283

"Convert a datetime.timedelta() to milliseconds"

284

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

285

+ (td.seconds * 1000)

286

+ (td.microseconds // 1000))

287

288

def timeout_milliseconds(self):

289

"Return the 'timeout' attribute in milliseconds"

290

return self._timedelta_to_milliseconds(self.timeout)

291

292

def interval_milliseconds(self):

293

"Return the 'interval' attribute in milliseconds"

294

return self._timedelta_to_milliseconds(self.interval)

295

296

def approval_delay_milliseconds(self):

297

return self._timedelta_to_milliseconds(self.approval_delay)

298

299

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

300

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

301

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

302

attribute."""

551

303

self.name = name

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

304

if config is None:

305

config = {}

569

306

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

307

# Uppercase and remove spaces from fingerprint for later

308

# comparison purposes with return value from the fingerprint()

309

# function

310

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

311

.replace(" ", ""))

570

312

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

571

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

572

datetime.datetime.utcnow())

573

574

# attributes specific for this server instance

313

if "secret" in config:

314

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

315

elif "secfile" in config:

316

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

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

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

322

% self.name)

323

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

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

327

self.last_enabled = None

328

self.last_checked_ok = None

329

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

330

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

331

self.disable_hook = disable_hook

575

332

self.checker = None

576

333

self.checker_initiator_tag = None

577

334

self.disable_initiator_tag = None

578

335

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

579

337

self.current_checker_command = None

580

self.approved = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

581

342

self.approvals_pending = 0

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)

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

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

593

348

594

# Send notice to process children that client state has changed

595

349

def send_changedstate(self):

596

with self.changedstate:

597

self.changedstate.notify_all()

598

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

599

354

def enable(self):

600

355

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

601

356

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

602

357

# Already enabled

603

358

return

604

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

605

self.enabled = True

359

self.send_changedstate()

606

360

self.last_enabled = datetime.datetime.utcnow()

607

self.init_checker()

608

self.send_changedstate()

361

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

362

# and every interval from then on.

363

self.checker_initiator_tag = (gobject.timeout_add

364

(self.interval_milliseconds(),

365

self.start_checker))

366

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

367

self.disable_initiator_tag = (gobject.timeout_add

368

(self.timeout_milliseconds(),

369

self.disable))

370

self.enabled = True

371

# Also start a new checker *right now*.

372

self.start_checker()

609

373

610

374

def disable(self, quiet=True):

611

375

"""Disable this client."""

612

376

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

613

377

return False

614

378

if not quiet:

379

self.send_changedstate()

380

if not quiet:

615

381

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

616

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

382

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

617

383

gobject.source_remove(self.disable_initiator_tag)

618

384

self.disable_initiator_tag = None

619

self.expires = None

620

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

385

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

621

386

gobject.source_remove(self.checker_initiator_tag)

622

387

self.checker_initiator_tag = None

623

388

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

624

391

self.enabled = False

625

if not quiet:

626

self.send_changedstate()

627

392

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

628

393

return False

629

394

630

395

def __del__(self):

396

self.disable_hook = None

631

397

self.disable()

632

398

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):

399

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

651

400

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

652

401

self.checker_callback_tag = None

653

402

self.checker = None

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:

403

if os.WIFEXITED(condition):

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

662

406

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

663

407

vars(self))

664

408

self.checked_ok()

665

409

else:

666

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

410

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

411

vars(self))

667

412

else:

668

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

670

413

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

671

414

vars(self))

672

return False

673

415

674

416

def checked_ok(self):

675

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

417

"""Bump up the timeout for this client.

418

419

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

420

alive and well.

421

"""

676

422

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."""

683

if timeout is None:

684

timeout = self.timeout

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

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

692

427

693

428

def need_approval(self):

694

429

self.last_approval_request = datetime.datetime.utcnow()

699

434

If a checker already exists, leave it running and do

700

435

nothing."""

701

436

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

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

437

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

438

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

439

# client would inevitably timeout, since no checker would get

440

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

706

441

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

707

442

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

708

443

# should be.

709

444

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

445

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

446

try:

447

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

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

452

else:

453

if pid:

454

logger.warning("Checker was a zombie")

455

gobject.source_remove(self.checker_callback_tag)

456

self.checker_callback(pid, status,

457

self.current_checker_command)

714

458

# Start a new checker if needed

715

459

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 }

720

460

try:

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

461

# In case checker_command has exactly one % operator

462

command = self.checker_command % self.host

463

except TypeError:

464

# Escape attributes for the shell

465

escaped_attrs = dict(

466

(attr,

467

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

468

errors=

469

'replace')))

470

for attr in

471

self.runtime_expansions)

472

473

try:

474

command = self.checker_command % escaped_attrs

475

except TypeError, error:

476

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

477

' %s', self.checker_command, error)

478

return True # Try again later

727

479

self.current_checker_command = command

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)

480

try:

481

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

482

command, self.name)

483

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

484

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

485

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

486

# always replaced by /dev/null.)

487

self.checker = subprocess.Popen(command,

488

close_fds=True,

489

shell=True, cwd="/")

490

self.checker_callback_tag = (gobject.child_watch_add

491

(self.checker.pid,

492

self.checker_callback,

493

data=command))

494

# The checker may have completed before the gobject

495

# watch was added. Check for this.

496

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

497

if pid:

498

gobject.source_remove(self.checker_callback_tag)

499

self.checker_callback(pid, status, command)

500

except OSError, error:

501

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

502

error)

753

503

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

754

504

return True

755

505

761

511

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

762

512

return

763

513

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

764

self.checker.terminate()

514

try:

515

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

516

#time.sleep(0.5)

517

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

518

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

519

except OSError, error:

520

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

521

raise

765

522

self.checker = None

766

523

767

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

524

def dbus_service_property(dbus_interface, signature="v",

525

access="readwrite", byte_arrays=False):

772

526

"""Decorators for marking methods of a DBusObjectWithProperties to

773

527

become properties on the D-Bus.

774

528

783

537

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

784

538

if byte_arrays and signature != "ay":

785

539

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

786

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

787

540

" signature %r" % signature)

788

541

def decorator(func):

789

542

func._dbus_is_property = True

790

543

func._dbus_interface = dbus_interface

795

548

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

796

549

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

797

550

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

840

551

return decorator

841

552

842

553

843

554

class DBusPropertyException(dbus.exceptions.DBusException):

844

555

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

845

556

"""

846

pass

557

def __unicode__(self):

558

return unicode(str(self))

847

559

848

560

849

561

class DBusPropertyAccessException(DBusPropertyException):

860

572

861

573

class DBusObjectWithProperties(dbus.service.Object):

862

574

"""A D-Bus object with properties.

863

575

864

576

Classes inheriting from this can use the dbus_service_property

865

577

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

866

578

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

867

579

"""

868

580

869

581

@staticmethod

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)

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

878

584

879

def _get_all_dbus_things(self, thing):

585

def _get_all_dbus_properties(self):

880

586

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

881

587

"""

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)))

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

887

591

888

592

def _get_dbus_property(self, interface_name, property_name):

889

593

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

890

594

property with the specified name and interface.

891

595

"""

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

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

899

606

# No such property

900

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

901

self.dbus_object_path, interface_name, property_name))

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

+ interface_name + "."

609

+ property_name)

902

610

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

611

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

905

612

out_signature="v")

906

613

def Get(self, interface_name, property_name):

907

614

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

925

632

# The byte_arrays option is not supported yet on

926

633

# signatures other than "ay".

927

634

if prop._dbus_signature != "ay":

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))

635

raise ValueError

636

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

637

for byte in value))

933

638

prop(value)

934

639

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

640

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

937

641

out_signature="a{sv}")

938

642

def GetAll(self, interface_name):

939

643

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

940

644

standard.

941

645

942

646

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

943

647

"""

944

properties = {}

945

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

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

946

650

if (interface_name

947

651

and interface_name != prop._dbus_interface):

948

652

# Interface non-empty but did not match

952

656

continue

953

657

value = prop()

954

658

if not hasattr(value, "variant_level"):

955

properties[name] = value

659

all[name] = value

956

660

continue

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

661

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

662

value.variant_level+1)

663

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

968

664

969

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

970

666

out_signature="s",

971

667

path_keyword='object_path',

972

668

connection_keyword='connection')

973

669

def Introspect(self, object_path, connection):

974

"""Overloading of standard D-Bus method.

975

976

Inserts property tags and interface annotation tags.

670

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

977

671

"""

978

672

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

979

673

connection)

980

674

try:

981

675

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

982

983

676

def make_tag(document, name, prop):

984

677

e = document.createElement("property")

985

678

e.setAttribute("name", name)

986

679

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

987

680

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

988

681

return e

989

990

682

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

991

# Add property tags

992

683

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

993

684

for name, prop

994

in self._get_all_dbus_things("property")

685

in self._get_all_dbus_properties()

995

686

if prop._dbus_interface

996

687

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

997

688

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)

1027

689

# Add the names to the return values for the

1028

690

# "org.freedesktop.DBus.Properties" methods

1029

691

if (if_tag.getAttribute("name")

1042

704

xmlstring = document.toxml("utf-8")

1043

705

document.unlink()

1044

706

except (AttributeError, xml.dom.DOMException,

1045

xml.parsers.expat.ExpatError) as error:

707

xml.parsers.expat.ExpatError), error:

1046

708

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

1047

exc_info=error)

709

error)

1048

710

return xmlstring

1049

711

1050

712

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"})

1241

713

class ClientDBus(Client, DBusObjectWithProperties):

1242

714

"""A Client class using D-Bus

1243

715

1247

719

"""

1248

720

1249

721

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

722

+ ("dbus_object_path",))

1253

723

1254

724

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

1255

725

1256

726

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

727

self._approvals_pending = 0

1257

728

self.bus = bus

1258

729

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

1259

730

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

1260

731

# the D-Bus

1261

client_object_name = str(self.name).translate(

732

client_object_name = unicode(self.name).translate(

1262

733

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

1263

734

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

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

735

self.dbus_object_path = (dbus.ObjectPath

736

("/clients/" + client_object_name))

1266

737

DBusObjectWithProperties.__init__(self, self.bus,

1267

738

self.dbus_object_path)

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

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

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

749

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

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

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

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

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

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

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

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

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

777

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

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

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

781

dbus.Boolean(False, variant_level=1))

782

return r

1349

783

1350

784

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

1351

785

try:

1356

790

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

1357

791

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

1358

792

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:

793

def checker_callback(self, pid, condition, command,

794

*args, **kwargs):

795

self.checker_callback_tag = None

796

self.checker = None

797

# Emit D-Bus signal

798

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

799

dbus.Boolean(False, variant_level=1))

800

if os.WIFEXITED(condition):

801

exitstatus = os.WEXITSTATUS(condition)

1366

802

# Emit D-Bus signal

1367

803

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

804

dbus.Int64(condition),

1369

805

dbus.String(command))

1370

806

else:

1371

807

# Emit D-Bus signal

1372

808

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

1373

dbus.Int64(

1374

self.last_checker_signal),

809

dbus.Int64(condition),

1375

810

dbus.String(command))

1376

return ret

811

812

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

813

*args, **kwargs)

814

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

1377

832

1378

833

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

1379

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

834

old_checker = self.checker

835

if self.checker is not None:

836

old_checker_pid = self.checker.pid

837

else:

838

old_checker_pid = None

1380

839

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

1381

840

# Only if new checker process was started

1382

841

if (self.checker is not None

1383

842

and old_checker_pid != self.checker.pid):

1384

843

# Emit D-Bus signal

1385

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1386

848

return r

1387

849

850

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

851

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

852

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

853

if (old_checker is not None

854

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

855

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

856

dbus.Boolean(False, variant_level=1))

857

return r

858

1388

859

def _reset_approved(self):

1389

self.approved = None

860

self._approved = None

1390

861

return False

1391

862

1392

863

def approve(self, value=True):

1393

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1396

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

1397

870

1398

871

## D-Bus methods, signals & properties

1399

1400

## Interfaces

872

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

1401

873

1402

874

## Signals

1403

875

1414

886

pass

1415

887

1416

888

# PropertyChanged - signal

1417

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

1418

889

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

1419

890

def PropertyChanged(self, property, value):

1420

891

"D-Bus signal"

1451

922

# CheckedOK - method

1452

923

@dbus.service.method(_interface)

1453

924

def CheckedOK(self):

1454

self.checked_ok()

925

return self.checked_ok()

1455

926

1456

927

# Enable - method

1457

928

@dbus.service.method(_interface)

1484

955

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

1485

956

1486

957

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

958

@dbus_service_property(_interface, signature="b",

1489

959

access="readwrite")

1490

960

def ApprovedByDefault_dbus_property(self, value=None):

1491

961

if value is None: # get

1492

962

return dbus.Boolean(self.approved_by_default)

1493

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

1494

967

1495

968

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

969

@dbus_service_property(_interface, signature="t",

1498

970

access="readwrite")

1499

971

def ApprovalDelay_dbus_property(self, value=None):

1500

972

if value is None: # get

1501

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

1502

* 1000)

973

return dbus.UInt64(self.approval_delay_milliseconds())

1503

974

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

975

# Emit D-Bus signal

976

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

977

dbus.UInt64(value, variant_level=1))

1504

978

1505

979

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

980

@dbus_service_property(_interface, signature="t",

1508

981

access="readwrite")

1509

982

def ApprovalDuration_dbus_property(self, value=None):

1510

983

if value is None: # get

1511

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

1512

* 1000)

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

1513

986

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

987

# Emit D-Bus signal

988

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

989

dbus.UInt64(value, variant_level=1))

1514

990

1515

991

# Name - property

1516

992

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

1523

999

return dbus.String(self.fingerprint)

1524

1000

1525

1001

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1002

@dbus_service_property(_interface, signature="s",

1528

1003

access="readwrite")

1529

1004

def Host_dbus_property(self, value=None):

1530

1005

if value is None: # get

1531

1006

return dbus.String(self.host)

1532

self.host = str(value)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1533

1011

1534

1012

# Created - property

1535

1013

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

1536

1014

def Created_dbus_property(self):

1537

return datetime_to_dbus(self.created)

1015

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

1538

1016

1539

1017

# LastEnabled - property

1540

1018

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

1541

1019

def LastEnabled_dbus_property(self):

1542

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1543

1023

1544

1024

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1025

@dbus_service_property(_interface, signature="b",

1547

1026

access="readwrite")

1548

1027

def Enabled_dbus_property(self, value=None):

1549

1028

if value is None: # get

1554

1033

self.disable()

1555

1034

1556

1035

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1036

@dbus_service_property(_interface, signature="s",

1559

1037

access="readwrite")

1560

1038

def LastCheckedOK_dbus_property(self, value=None):

1561

1039

if value is not None:

1562

1040

self.checked_ok()

1563

1041

return

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)

1570

1571

# Expires - property

1572

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

1573

def Expires_dbus_property(self):

1574

return datetime_to_dbus(self.expires)

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1575

1046

1576

1047

# LastApprovalRequest - property

1577

1048

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

1578

1049

def LastApprovalRequest_dbus_property(self):

1579

return datetime_to_dbus(self.last_approval_request)

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1580

1055

1581

1056

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1057

@dbus_service_property(_interface, signature="t",

1584

1058

access="readwrite")

1585

1059

def Timeout_dbus_property(self, value=None):

1586

1060

if value is None: # get

1587

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

1588

old_timeout = self.timeout

1061

return dbus.UInt64(self.timeout_milliseconds())

1589

1062

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

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

1606

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1609

access="readwrite")

1610

def ExtendedTimeout_dbus_property(self, value=None):

1611

if value is None: # get

1612

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

1613

* 1000)

1614

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

1063

# Emit D-Bus signal

1064

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

1065

dbus.UInt64(value, variant_level=1))

1066

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

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

1615

1083

1616

1084

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1085

@dbus_service_property(_interface, signature="t",

1619

1086

access="readwrite")

1620

1087

def Interval_dbus_property(self, value=None):

1621

1088

if value is None: # get

1622

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

1089

return dbus.UInt64(self.interval_milliseconds())

1623

1090

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

1091

# Emit D-Bus signal

1092

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

1093

dbus.UInt64(value, variant_level=1))

1624

1094

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

1625

1095

return

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

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

1633

1102

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1103

@dbus_service_property(_interface, signature="s",

1636

1104

access="readwrite")

1637

1105

def Checker_dbus_property(self, value=None):

1638

1106

if value is None: # get

1639

1107

return dbus.String(self.checker_command)

1640

self.checker_command = str(value)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

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

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1641

1113

1642

1114

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1115

@dbus_service_property(_interface, signature="b",

1645

1116

access="readwrite")

1646

1117

def CheckerRunning_dbus_property(self, value=None):

1647

1118

if value is None: # get

1657

1128

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1129

1659

1130

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1131

@dbus_service_property(_interface, signature="ay",

1132

access="write", byte_arrays=True)

1664

1133

def Secret_dbus_property(self, value):

1665

self.secret = bytes(value)

1134

self.secret = str(value)

1666

1135

1667

1136

del _interface

1668

1137

1672

1141

self._pipe = child_pipe

1673

1142

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

1674

1143

if not self._pipe.recv():

1675

raise KeyError(fpr)

1676

1144

raise KeyError()

1145

1677

1146

def __getattribute__(self, name):

1678

if name == '_pipe':

1147

if(name == '_pipe'):

1679

1148

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

1680

1149

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

1681

1150

data = self._pipe.recv()

1682

1151

if data[0] == 'data':

1683

1152

return data[1]

1684

1153

if data[0] == 'function':

1685

1686

1154

def func(*args, **kwargs):

1687

1155

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

1688

1156

return self._pipe.recv()[1]

1689

1690

1157

return func

1691

1158

1692

1159

def __setattr__(self, name, value):

1693

if name == '_pipe':

1160

if(name == '_pipe'):

1694

1161

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

1695

1162

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

1696

1163

1704

1171

def handle(self):

1705

1172

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

1706

1173

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

1707

str(self.client_address))

1174

unicode(self.client_address))

1708

1175

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

1709

1176

self.server.child_pipe.fileno())

1710

1711

session = gnutls.connection.ClientSession(

1712

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

1713

1177

1178

session = (gnutls.connection

1179

.ClientSession(self.request,

1180

gnutls.connection

1181

.X509Credentials()))

1182

1714

1183

# Note: gnutls.connection.X509Credentials is really a

1715

1184

# generic GnuTLS certificate credentials object so long as

1716

1185

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

1717

1186

# here despite using OpenPGP certificates.

1718

1187

1719

1188

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

1720

1189

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

1721

1190

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

1724

1193

priority = self.server.gnutls_priority

1725

1194

if priority is None:

1726

1195

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1729

1196

(gnutls.library.functions

1197

.gnutls_priority_set_direct(session._c_object,

1198

priority, None))

1199

1730

1200

# Start communication using the Mandos protocol

1731

1201

# Get protocol number

1732

1202

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

1733

1203

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

1734

1204

try:

1735

1205

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

1736

raise RuntimeError(line)

1737

except (ValueError, IndexError, RuntimeError) as error:

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1738

1208

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

1739

1209

return

1740

1210

1741

1211

# Start GnuTLS connection

1742

1212

try:

1743

1213

session.handshake()

1744

except gnutls.errors.GNUTLSError as error:

1214

except gnutls.errors.GNUTLSError, error:

1745

1215

logger.warning("Handshake failed: %s", error)

1746

1216

# Do not run session.bye() here: the session is not

1747

1217

# established. Just abandon the request.

1748

1218

return

1749

1219

logger.debug("Handshake succeeded")

1750

1220

1751

1221

approval_required = False

1752

1222

try:

1753

1223

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1756

except (TypeError,

1757

gnutls.errors.GNUTLSError) as error:

1224

fpr = self.fingerprint(self.peer_certificate

1225

(session))

1226

except (TypeError, gnutls.errors.GNUTLSError), error:

1758

1227

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

1759

1228

return

1760

1229

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

1761

1230

1762

1231

try:

1763

1232

client = ProxyClient(child_pipe, fpr,

1764

1233

self.client_address)

1772

1241

1773

1242

while True:

1774

1243

if not client.enabled:

1775

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

1776

client.name)

1244

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

1245

client.name)

1777

1246

if self.server.use_dbus:

1778

1247

# Emit D-Bus signal

1779

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

1780

1249

return

1781

1250

1782

if client.approved or not client.approval_delay:

1251

if client._approved or not client.approval_delay:

1783

1252

#We are approved or approval is disabled

1784

1253

break

1785

elif client.approved is None:

1254

elif client._approved is None:

1786

1255

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

1787

1256

client.name)

1788

1257

if self.server.use_dbus:

1789

1258

# Emit D-Bus signal

1790

1259

client.NeedApproval(

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

1793

1262

else:

1794

1263

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

1795

1264

client.name)

1799

1268

return

1800

1269

1801

1270

#wait until timeout or approved

1271

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

1802

1272

time = datetime.datetime.now()

1803

1273

client.changedstate.acquire()

1804

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

1274

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

1805

1275

client.changedstate.release()

1806

1276

time2 = datetime.datetime.now()

1807

1277

if (time2 - time) >= delay:

1822

1292

while sent_size < len(client.secret):

1823

1293

try:

1824

1294

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

1825

except gnutls.errors.GNUTLSError as error:

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1828

1297

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1298

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

1299

sent, len(client.secret)

1300

- (sent_size + sent))

1832

1301

sent_size += sent

1833

1302

1834

1303

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

1835

# bump the timeout using extended_timeout

1836

client.bump_timeout(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

1837

1306

if self.server.use_dbus:

1838

1307

# Emit D-Bus signal

1839

1308

client.GotSecret()

1843

1312

client.approvals_pending -= 1

1844

1313

try:

1845

1314

session.bye()

1846

except gnutls.errors.GNUTLSError as error:

1847

logger.warning("GnuTLS bye failed",

1848

exc_info=error)

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1849

1317

1850

1318

@staticmethod

1851

1319

def peer_certificate(session):

1852

1320

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

1853

1321

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1322

if (gnutls.library.functions

1323

.gnutls_certificate_type_get(session._c_object)

1856

1324

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1325

# ...do the normal thing

1858

1326

return session.peer_certificate

1872

1340

def fingerprint(openpgp):

1873

1341

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1342

# New GnuTLS "datum" with the OpenPGP public key

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)))

1343

datum = (gnutls.library.types

1344

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

1345

ctypes.POINTER

1346

(ctypes.c_ubyte)),

1347

ctypes.c_uint(len(openpgp))))

1879

1348

# New empty GnuTLS certificate

1880

1349

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1350

(gnutls.library.functions

1351

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1352

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1353

(gnutls.library.functions

1354

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

1355

gnutls.library.constants

1356

.GNUTLS_OPENPGP_FMT_RAW))

1887

1357

# Verify the self signature in the key

1888

1358

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1359

(gnutls.library.functions

1360

.gnutls_openpgp_crt_verify_self(crt, 0,

1361

ctypes.byref(crtverify)))

1891

1362

if crtverify.value != 0:

1892

1363

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1364

raise (gnutls.errors.CertificateSecurityError

1365

("Verify failed"))

1895

1366

# New buffer for the fingerprint

1896

1367

buf = ctypes.create_string_buffer(20)

1897

1368

buf_len = ctypes.c_size_t()

1898

1369

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1370

(gnutls.library.functions

1371

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

1372

ctypes.byref(buf_len)))

1901

1373

# Deinit the certificate

1902

1374

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1375

# Convert the buffer to a Python bytestring

1904

1376

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

1905

1377

# Convert the bytestring to hexadecimal notation

1906

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

1378

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

1907

1379

return hex_fpr

1908

1380

1909

1381

1910

1382

class MultiprocessingMixIn(object):

1911

1383

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

1912

1913

1384

def sub_process_main(self, request, address):

1914

1385

try:

1915

1386

self.finish_request(request, address)

1916

except Exception:

1387

except:

1917

1388

self.handle_error(request, address)

1918

1389

self.close_request(request)

1919

1390

1920

1391

def process_request(self, request, address):

1921

1392

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

1922

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

1923

args = (request, address))

1924

proc.start()

1925

return proc

1926

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1927

1395

1928

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1397

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

1930

1931

1398

def process_request(self, request, client_address):

1932

1399

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

1933

1400

1934

1401

This function creates a new pipe in self.pipe

1935

1402

"""

1936

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1937

1938

proc = MultiprocessingMixIn.process_request(self, request,

1939

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1940

1407

self.child_pipe.close()

1941

self.add_pipe(parent_pipe, proc)

1942

1943

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1944

1411

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

1945

raise NotImplementedError()

1946

1412

raise NotImplementedError

1947

1413

1948

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1949

1415

socketserver.TCPServer, object):

1954

1420

interface: None or a network interface name (string)

1955

1421

use_ipv6: Boolean; to use IPv6 or not

1956

1422

"""

1957

1958

1423

def __init__(self, server_address, RequestHandlerClass,

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

"""

1424

interface=None, use_ipv6=True):

1965

1425

self.interface = interface

1966

1426

if use_ipv6:

1967

1427

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.

1994

1428

socketserver.TCPServer.__init__(self, server_address,

1995

1429

RequestHandlerClass)

1996

1997

1430

def server_bind(self):

1998

1431

"""This overrides the normal server_bind() function

1999

1432

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

2005

1438

self.interface)

2006

1439

else:

2007

1440

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

2011

except socket.error as error:

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:

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1442

SO_BINDTODEVICE,

1443

str(self.interface

1444

+ '\0'))

1445

except socket.error, error:

1446

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

1449

self.interface)

1450

elif error[0] == errno.ENOPROTOOPT:

2016

1451

logger.error("SO_BINDTODEVICE not available;"

2017

1452

" cannot bind to interface %s",

2018

1453

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

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

2021

" cannot bind", self.interface)

2022

1454

else:

2023

1455

raise

2024

1456

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

2027

1459

if self.address_family == socket.AF_INET6:

2028

1460

any_address = "::" # in6addr_any

2029

1461

else:

2030

any_address = "0.0.0.0" # INADDR_ANY

1462

any_address = socket.INADDR_ANY

2031

1463

self.server_address = (any_address,

2032

1464

self.server_address[1])

2033

1465

elif not self.server_address[1]:

2034

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

1466

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

1467

0)

2035

1468

# if self.interface:

2036

1469

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

2037

1470

# 0, # port

2051

1484

2052

1485

Assumes a gobject.MainLoop event loop.

2053

1486

"""

2054

2055

1487

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

1488

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

1489

gnutls_priority=None, use_dbus=True):

2062

1490

self.enabled = False

2063

1491

self.clients = clients

2064

1492

if self.clients is None:

2065

self.clients = {}

1493

self.clients = set()

2066

1494

self.use_dbus = use_dbus

2067

1495

self.gnutls_priority = gnutls_priority

2068

1496

IPv6_TCPServer.__init__(self, server_address,

2069

1497

RequestHandlerClass,

2070

1498

interface = interface,

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

1499

use_ipv6 = use_ipv6)

2074

1500

def server_activate(self):

2075

1501

if self.enabled:

2076

1502

return socketserver.TCPServer.server_activate(self)

2077

2078

1503

def enable(self):

2079

1504

self.enabled = True

2080

2081

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

2082

1506

# Call "handle_ipc" for both data and EOF events

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,

1507

gobject.io_add_watch(parent_pipe.fileno(),

1508

gobject.IO_IN | gobject.IO_HUP,

1509

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

1512

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

2093

1513

client_object=None):

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()

1514

condition_names = {

1515

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

1516

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

1517

# blocking).

1518

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

1519

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

1520

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

1521

# broken, usually for pipes and

1522

# sockets).

1523

}

1524

conditions_string = ' | '.join(name

1525

for cond, name in

1526

condition_names.iteritems()

1527

if cond & condition)

1528

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

1529

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

2098

1530

return False

2099

1531

2100

1532

# Read a request from the child

2105

1537

fpr = request[1]

2106

1538

address = request[2]

2107

1539

2108

for c in self.clients.itervalues():

1540

for c in self.clients:

2109

1541

if c.fingerprint == fpr:

2110

1542

client = c

2111

1543

break

2112

1544

else:

2113

logger.info("Client not found for fingerprint: %s, ad"

2114

"dress: %s", fpr, address)

1545

logger.warning("Client not found for fingerprint: %s, ad"

1546

"dress: %s", fpr, address)

2115

1547

if self.use_dbus:

2116

1548

# Emit D-Bus signal

2117

mandos_dbus_service.ClientNotFound(fpr,

2118

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2119

1550

parent_pipe.send(False)

2120

1551

return False

2121

1552

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))

1553

gobject.io_add_watch(parent_pipe.fileno(),

1554

gobject.IO_IN | gobject.IO_HUP,

1555

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2129

1558

parent_pipe.send(True)

2130

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

2131

# same fileno

1559

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

2132

1560

return False

2133

1561

if command == 'funcall':

2134

1562

funcname = request[1]

2135

1563

args = request[2]

2136

1564

kwargs = request[3]

2137

1565

2138

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

2139

funcname)(*args,

2140

**kwargs)))

2141

1566

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

1567

2142

1568

if command == 'getattr':

2143

1569

attrname = request[1]

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

1570

if callable(client_object.__getattribute__(attrname)):

1571

parent_pipe.send(('function',))

2147

1572

else:

2148

parent_pipe.send((

2149

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

1573

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

2150

1574

2151

1575

if command == 'setattr':

2152

1576

attrname = request[1]

2153

1577

value = request[2]

2154

1578

setattr(client_object, attrname, value)

2155

1579

2156

1580

return True

2157

1581

2158

1582

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

2255

1583

def string_to_delta(interval):

2256

1584

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

2257

1585

2268

1596

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

2269

1597

datetime.timedelta(0, 330)

2270

1598

"""

2271

2272

try:

2273

return rfc3339_duration_to_delta(interval)

2274

except ValueError:

2275

pass

2276

2277

1599

timevalue = datetime.timedelta(0)

2278

1600

for s in interval.split():

2279

1601

try:

2280

suffix = s[-1]

1602

suffix = unicode(s[-1])

2281

1603

value = int(s[:-1])

2282

1604

if suffix == "d":

2283

1605

delta = datetime.timedelta(value)

2290

1612

elif suffix == "w":

2291

1613

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

2292

1614

else:

2293

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

2294

except IndexError as e:

1615

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

1616

except (ValueError, IndexError), e:

2295

1617

raise ValueError(*(e.args))

2296

1618

timevalue += delta

2297

1619

return timevalue

2298

1620

2299

1621

1622

def if_nametoindex(interface):

1623

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

1624

1625

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

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

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

1633

def if_nametoindex(interface):

1634

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

1635

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

1636

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

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1639

interface))

1640

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

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

2300

1646

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

2301

1647

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

2302

1648

2310

1656

sys.exit()

2311

1657

if not noclose:

2312

1658

# Close all standard open file descriptors

2313

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

1659

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

2314

1660

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

2315

1661

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2317

.format(os.devnull))

1662

"%s not a character device"

1663

% os.path.devnull)

2318

1664

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

2319

1665

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

2320

1666

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

2329

1675

2330

1676

parser = argparse.ArgumentParser()

2331

1677

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

2332

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

1678

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

2333

1679

help="show version number and exit")

2334

1680

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

2335

1681

help="Bind to interface IF")

2341

1687

help="Run self-test")

2342

1688

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

2343

1689

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

2344

" to terminal", default=None)

1690

" to terminal")

2345

1691

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

2346

1692

help="Debug level for stdout output")

2347

1693

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

2354

1700

" files")

2355

1701

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

2356

1702

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

2357

" system bus interface", default=None)

1703

" system bus interface")

2358

1704

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

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

1705

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

2375

1706

options = parser.parse_args()

2376

1707

2377

1708

if options.check:

2378

1709

import doctest

2379

fail_count, test_count = doctest.testmod()

2380

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

1710

doctest.testmod()

1711

sys.exit()

2381

1712

2382

1713

# Default values for config file for server-global settings

2383

1714

server_defaults = { "interface": "",

2385

1716

"port": "",

2386

1717

"debug": "False",

2387

1718

"priority":

2388

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

2389

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

1719

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

2390

1720

"servicename": "Mandos",

2391

1721

"use_dbus": "True",

2392

1722

"use_ipv6": "True",

2393

1723

"debuglevel": "",

2394

"restore": "True",

2395

"socket": "",

2396

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

2397

"foreground": "False",

2398

"zeroconf": "True",

2399

}

1724

}

2400

1725

2401

1726

# Parse config file for server-global settings

2402

1727

server_config = configparser.SafeConfigParser(server_defaults)

2403

1728

del server_defaults

2404

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

1729

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

1730

"mandos.conf"))

2405

1731

# Convert the SafeConfigParser object to a dict

2406

1732

server_settings = server_config.defaults()

2407

1733

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

2408

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

1734

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

2409

1735

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

2410

1736

option)

2411

1737

if server_settings["port"]:

2412

1738

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

2413

1739

"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"])

2423

1740

del server_config

2424

1741

2425

1742

# Override the settings from the config file with command line

2426

1743

# options, if set.

2427

1744

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

2428

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

2429

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

2430

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

1745

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

1746

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

2431

1747

value = getattr(options, option)

2432

1748

if value is not None:

2433

1749

server_settings[option] = value

2434

1750

del options

2435

1751

# Force all strings to be unicode

2436

1752

for option in server_settings.keys():

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

1753

if type(server_settings[option]) is str:

1754

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

2447

1755

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

2448

1756

2449

1757

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

2450

1758

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

2456

1759

# For convenience

2457

1760

debug = server_settings["debug"]

2458

1761

debuglevel = server_settings["debuglevel"]

2459

1762

use_dbus = server_settings["use_dbus"]

2460

1763

use_ipv6 = server_settings["use_ipv6"]

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

1764

2475

1765

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

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

1766

syslogger.setFormatter(logging.Formatter

1767

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

1768

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

1769

% server_settings["servicename"]))

2480

1770

2481

1771

# Parse config file with clients

2482

client_config = configparser.SafeConfigParser(Client

2483

.client_defaults)

1772

client_defaults = { "timeout": "1h",

1773

"interval": "5m",

1774

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

1775

"host": "",

1776

"approval_delay": "0s",

1777

"approval_duration": "1s",

1778

}

1779

client_config = configparser.SafeConfigParser(client_defaults)

2484

1780

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

2485

1781

"clients.conf"))

2486

1782

2487

1783

global mandos_dbus_service

2488

1784

mandos_dbus_service = None

2489

1785

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

1786

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

1787

server_settings["port"]),

1788

ClientHandler,

1789

interface=(server_settings["interface"]

1790

or None),

1791

use_ipv6=use_ipv6,

1792

gnutls_priority=

1793

server_settings["priority"],

1794

use_dbus=use_dbus)

1795

if not debug:

1796

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

2506

1797

try:

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)

1798

pidfile = open(pidfilename, "w")

1799

except IOError:

1800

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

2511

1801

2512

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

1802

try:

1803

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

1804

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

1805

except KeyError:

2513

1806

try:

2514

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

2516

break

1807

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

1808

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

2517

1809

except KeyError:

2518

continue

2519

else:

2520

uid = 65534

2521

gid = 65534

1810

try:

1811

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

1812

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

1813

except KeyError:

1814

uid = 65534

1815

gid = 65534

2522

1816

try:

2523

1817

os.setgid(gid)

2524

1818

os.setuid(uid)

2525

except OSError as error:

2526

if error.errno != errno.EPERM:

2527

raise

1819

except OSError, error:

1820

if error[0] != errno.EPERM:

1821

raise error

2528

1822

1823

if not debug and not debuglevel:

1824

syslogger.setLevel(logging.WARNING)

1825

console.setLevel(logging.WARNING)

1826

if debuglevel:

1827

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

1828

syslogger.setLevel(level)

1829

console.setLevel(level)

1830

2529

1831

if debug:

2530

1832

# Enable all possible GnuTLS debugging

2531

1833

2537

1839

def debug_gnutls(level, string):

2538

1840

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

2539

1841

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

1842

(gnutls.library.functions

1843

.gnutls_global_set_log_function(debug_gnutls))

2542

1844

2543

1845

# Redirect stdin so all checkers get /dev/null

2544

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

1846

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

2545

1847

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

2546

1848

if null > 2:

2547

1849

os.close(null)

1850

else:

1851

# No console logging

1852

logger.removeHandler(console)

2548

1853

2549

1854

# Need to fork before connecting to D-Bus

2550

if not foreground:

1855

if not debug:

2551

1856

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

2552

1857

daemon()

2553

1858

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

2558

1859

global main_loop

2559

1860

# From the Avahi example code

2560

DBusGMainLoop(set_as_default=True)

1861

DBusGMainLoop(set_as_default=True )

2561

1862

main_loop = gobject.MainLoop()

2562

1863

bus = dbus.SystemBus()

2563

1864

# End of Avahi example code

2564

1865

if use_dbus:

2565

1866

try:

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)

1867

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

1868

bus, do_not_queue=True)

1869

except dbus.exceptions.NameExistsException, e:

1870

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

2574

1871

use_dbus = False

2575

1872

server_settings["use_dbus"] = False

2576

1873

tcp_server.use_dbus = False

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"))

1874

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1875

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

1876

servicetype = "_mandos._tcp",

1877

protocol = protocol, bus = bus)

1878

if server_settings["interface"]:

1879

service.interface = (if_nametoindex

1880

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

2587

1881

2588

1882

global multiprocessing_manager

2589

1883

multiprocessing_manager = multiprocessing.Manager()

2591

1885

client_class = Client

2592

1886

if use_dbus:

2593

1887

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

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))

1888

def client_config_items(config, section):

1889

special_settings = {

1890

"approved_by_default":

1891

lambda: config.getboolean(section,

1892

"approved_by_default"),

1893

}

1894

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

2678

1895

try:

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

1896

yield (name, special_settings[name]())

1897

except KeyError:

1898

yield (name, value)

1899

1900

tcp_server.clients.update(set(

1901

client_class(name = section,

1902

config= dict(client_config_items(

1903

client_config, section)))

1904

for section in client_config.sections()))

2704

1905

if not tcp_server.clients:

2705

1906

logger.warning("No clients defined")

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

1907

1908

if not debug:

1909

try:

1910

with pidfile:

1911

pid = os.getpid()

1912

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

1913

del pidfile

1914

except IOError:

1915

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

1916

pidfilename, pid)

1917

except NameError:

1918

# "pidfile" was never created

1919

pass

2717

1920

del pidfilename

2718

1921

1922

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

1923

2719

1924

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

2720

1925

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

2721

1926

2722

1927

if use_dbus:

2723

2724

@alternate_dbus_interfaces(

2725

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

2726

class MandosDBusService(DBusObjectWithProperties):

1928

class MandosDBusService(dbus.service.Object):

2727

1929

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

2728

2729

1930

def __init__(self):

2730

1931

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

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" }

1932

_interface = "se.bsnet.fukt.Mandos"

2739

1933

2740

1934

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

2741

1935

def ClientAdded(self, objpath):

2755

1949

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

2756

1950

def GetAllClients(self):

2757

1951

"D-Bus method"

2758

return dbus.Array(c.dbus_object_path for c in

2759

tcp_server.clients.itervalues())

1952

return dbus.Array(c.dbus_object_path

1953

for c in tcp_server.clients)

2760

1954

2761

1955

@dbus.service.method(_interface,

2762

1956

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

2763

1957

def GetAllClientsWithProperties(self):

2764

1958

"D-Bus method"

2765

1959

return dbus.Dictionary(

2766

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

2767

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

1960

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

1961

for c in tcp_server.clients),

2768

1962

signature="oa{sv}")

2769

1963

2770

1964

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

2771

1965

def RemoveClient(self, object_path):

2772

1966

"D-Bus method"

2773

for c in tcp_server.clients.itervalues():

1967

for c in tcp_server.clients:

2774

1968

if c.dbus_object_path == object_path:

2775

del tcp_server.clients[c.name]

1969

tcp_server.clients.remove(c)

2776

1970

c.remove_from_connection()

2777

1971

# Don't signal anything except ClientRemoved

2778

1972

c.disable(quiet=True)

2787

1981

2788

1982

def cleanup():

2789

1983

"Cleanup function; run on exit"

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

1984

service.cleanup()

1985

2851

1986

while tcp_server.clients:

2852

name, client = tcp_server.clients.popitem()

1987

client = tcp_server.clients.pop()

2853

1988

if use_dbus:

2854

1989

client.remove_from_connection()

1990

client.disable_hook = None

2855

1991

# Don't signal anything except ClientRemoved

2856

1992

client.disable(quiet=True)

2857

1993

if use_dbus:

2858

1994

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2861

client_settings.clear()

1995

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

1996

client.name)

2862

1997

2863

1998

atexit.register(cleanup)

2864

1999

2865

for client in tcp_server.clients.itervalues():

2000

for client in tcp_server.clients:

2866

2001

if use_dbus:

2867

2002

# Emit D-Bus signal

2868

2003

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2869

# Need to initiate checking of clients

2870

if client.enabled:

2871

client.init_checker()

2004

client.enable()

2872

2005

2873

2006

tcp_server.enable()

2874

2007

tcp_server.server_activate()

2875

2008

2876

2009

# Find out what port we got

2877

if zeroconf:

2878

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

2010

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

2879

2011

if use_ipv6:

2880

2012

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

2881

" flowinfo %d, scope_id %d",

2882

*tcp_server.socket.getsockname())

2013

" flowinfo %d, scope_id %d"

2014

% tcp_server.socket.getsockname())

2883

2015

else: # IPv4

2884

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

2885

*tcp_server.socket.getsockname())

2016

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

2017

% tcp_server.socket.getsockname())

2886

2018

2887

2019

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

2888

2020

2889

2021

try:

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

2022

# From the Avahi example code

2023

try:

2024

service.activate()

2025

except dbus.exceptions.DBusException, error:

2026

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

2027

cleanup()

2028

sys.exit(1)

2029

# End of Avahi example code

2899

2030

2900

2031

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

2901

2032

lambda *args, **kwargs:

2904

2035

2905

2036

logger.debug("Starting main loop")

2906

2037

main_loop.run()

2907

except AvahiError as error:

2908

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

2038

except AvahiError, error:

2039

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

2909

2040

cleanup()

2910

2041

sys.exit(1)

2911

2042

except KeyboardInterrupt:

2916

2047

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

2917

2048

cleanup()

2918

2049

2919

2920

2050

if __name__ == '__main__':

2921

2051

main()