/mandos/trunk : revision 521.1.1

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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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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 hashlib

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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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import ctypes.util

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import xml.dom.minidom

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import inspect

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import Crypto.Cipher.AES

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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version = "1.4.1"

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

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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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.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"""

301

163

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

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.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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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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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 = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

229

dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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381

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

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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 = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

390

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if state in bad_states:

391

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if bad_states[state] is not None:

392

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if error is None:

395

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

396

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self.cleanup()

397

250

elif state == avahi.SERVER_RUNNING:

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

251

self.add()

410

252

else:

411

253

if error is None:

412

254

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

413

255

else:

414

256

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

415

416

257

def activate(self):

417

258

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

418

259

if self.server is None:

422

263

follow_name_owner_changes=True),

423

264

avahi.DBUS_INTERFACE_SERVER)

424

265

self.server.connect_to_signal("StateChanged",

425

self.server_state_changed)

266

self.server_state_changed)

426

267

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

427

268

428

429

269

class AvahiServiceToSyslog(AvahiService):

430

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

270

def rename(self):

431

271

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

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

272

ret = AvahiService.rename(self)

273

syslogger.setFormatter(logging.Formatter

274

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

275

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

276

% self.name))

436

277

return ret

437

278

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

447

279

def _timedelta_to_milliseconds(td):

280

"Convert a datetime.timedelta() to milliseconds"

281

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

282

+ (td.seconds * 1000)

283

+ (td.microseconds // 1000))

284

448

285

class Client(object):

449

286

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

450

287

451

288

Attributes:

452

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

289

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

453

290

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

454

291

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

455

292

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

474

311

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

475

312

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

476

313

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

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

314

status of last checker. -1 reflect crashed

315

checker, or None.

316

last_enabled: datetime.datetime(); (UTC)

482

317

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

483

318

D-Bus identifiers

484

319

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

485

320

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

486

321

until this client is disabled

487

extended_timeout: extra long timeout when secret has been sent

322

extended_timeout: extra long timeout when password has been sent

488

323

runtime_expansions: Allowed attributes for runtime expansion.

489

324

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

490

325

disabled, or None

491

server_settings: The server_settings dict from main()

492

326

"""

493

327

494

328

runtime_expansions = ("approval_delay", "approval_duration",

495

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

496

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

497

"last_approval_request", "last_checked_ok",

329

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

330

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

498

331

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

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

510

511

@staticmethod

512

def config_parser(config):

513

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

514

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

515

with exceptions for any special settings as defined above.

516

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

517

value given the same arguments.

518

"""

519

settings = {}

520

for client_name in config.sections():

521

section = dict(config.items(client_name))

522

client = settings[client_name] = {}

523

524

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

525

# Reformat values from string types to Python types

526

client["approved_by_default"] = config.getboolean(

527

client_name, "approved_by_default")

528

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

529

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

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

535

.replace(" ", ""))

536

if "secret" in section:

537

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

538

elif "secfile" in section:

539

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

540

(section["secfile"])),

541

"rb") as secfile:

542

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

543

else:

544

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

545

.format(section))

546

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

547

client["extended_timeout"] = string_to_delta(

548

section["extended_timeout"])

549

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

550

client["approval_delay"] = string_to_delta(

551

section["approval_delay"])

552

client["approval_duration"] = string_to_delta(

553

section["approval_duration"])

554

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

555

client["last_approval_request"] = None

556

client["last_checked_ok"] = None

557

client["last_checker_status"] = -2

558

559

return settings

560

561

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

332

333

def timeout_milliseconds(self):

334

"Return the 'timeout' attribute in milliseconds"

335

return _timedelta_to_milliseconds(self.timeout)

336

337

def extended_timeout_milliseconds(self):

338

"Return the 'extended_timeout' attribute in milliseconds"

339

return _timedelta_to_milliseconds(self.extended_timeout)

340

341

def interval_milliseconds(self):

342

"Return the 'interval' attribute in milliseconds"

343

return _timedelta_to_milliseconds(self.interval)

344

345

def approval_delay_milliseconds(self):

346

return _timedelta_to_milliseconds(self.approval_delay)

347

348

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

349

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

350

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

351

attribute."""

562

352

self.name = name

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

566

# adding all client settings

567

for setting, value in settings.items():

568

setattr(self, setting, value)

569

570

if self.enabled:

571

if not hasattr(self, "last_enabled"):

572

self.last_enabled = datetime.datetime.utcnow()

573

if not hasattr(self, "expires"):

574

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

575

+ self.timeout)

576

else:

577

self.last_enabled = None

578

self.expires = None

579

353

if config is None:

354

config = {}

580

355

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

356

# Uppercase and remove spaces from fingerprint for later

357

# comparison purposes with return value from the fingerprint()

358

# function

359

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

360

.replace(" ", ""))

581

361

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

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

362

if "secret" in config:

363

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

364

elif "secfile" in config:

365

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

366

(config["secfile"])),

367

"rb") as secfile:

368

self.secret = secfile.read()

369

else:

370

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

371

% self.name)

372

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

373

self.created = datetime.datetime.utcnow()

374

self.enabled = True

375

self.last_approval_request = None

376

self.last_enabled = datetime.datetime.utcnow()

377

self.last_checked_ok = None

378

self.last_checker_status = None

379

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

380

self.extended_timeout = string_to_delta(config

381

["extended_timeout"])

382

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

586

383

self.checker = None

587

384

self.checker_initiator_tag = None

588

385

self.disable_initiator_tag = None

386

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

589

387

self.checker_callback_tag = None

388

self.checker_command = config["checker"]

590

389

self.current_checker_command = None

591

self.approved = None

390

self._approved = None

391

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

392

True)

592

393

self.approvals_pending = 0

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

394

self.approval_delay = string_to_delta(

395

config["approval_delay"])

396

self.approval_duration = string_to_delta(

397

config["approval_duration"])

398

self.changedstate = (multiprocessing_manager

399

.Condition(multiprocessing_manager

400

.Lock()))

401

self.client_structure = [attr for attr

402

in self.__dict__.iterkeys()

597

403

if not attr.startswith("_")]

598

404

self.client_structure.append("client_structure")

599

600

for name, t in inspect.getmembers(

601

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

405

406

407

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

408

lambda obj:

409

isinstance(obj,

410

property)):

602

411

if not name.startswith("_"):

603

412

self.client_structure.append(name)

604

413

612

421

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

613

422

# Already enabled

614

423

return

424

self.send_changedstate()

615

425

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

616

426

self.enabled = True

617

427

self.last_enabled = datetime.datetime.utcnow()

618

428

self.init_checker()

619

self.send_changedstate()

620

429

621

430

def disable(self, quiet=True):

622

431

"""Disable this client."""

623

432

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

624

433

return False

625

434

if not quiet:

435

self.send_changedstate()

436

if not quiet:

626

437

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

627

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

438

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

628

439

gobject.source_remove(self.disable_initiator_tag)

629

440

self.disable_initiator_tag = None

630

441

self.expires = None

631

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

442

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

632

443

gobject.source_remove(self.checker_initiator_tag)

633

444

self.checker_initiator_tag = None

634

445

self.stop_checker()

635

446

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

638

447

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

639

448

return False

640

449

641

450

def __del__(self):

642

451

self.disable()

643

452

644

453

def init_checker(self):

645

454

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

646

455

# and every interval from then on.

647

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

456

self.checker_initiator_tag = (gobject.timeout_add

457

(self.interval_milliseconds(),

458

self.start_checker))

652

459

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

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

460

self.disable_initiator_tag = (gobject.timeout_add

461

(self.timeout_milliseconds(),

462

self.disable))

657

463

# Also start a new checker *right now*.

658

464

self.start_checker()

659

660

def checker_callback(self, source, condition, connection,

661

command):

465

466

467

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

662

468

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

663

469

self.checker_callback_tag = None

664

470

self.checker = None

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

471

if os.WIFEXITED(condition):

472

self.last_checker_status = os.WEXITSTATUS(condition)

672

473

if self.last_checker_status == 0:

673

474

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

674

475

vars(self))

675

476

self.checked_ok()

676

477

else:

677

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

478

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

479

vars(self))

678

480

else:

679

481

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

681

482

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

682

483

vars(self))

683

return False

684

685

def checked_ok(self):

686

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

687

self.last_checked_ok = datetime.datetime.utcnow()

688

self.last_checker_status = 0

689

self.last_checker_signal = None

690

self.bump_timeout()

691

692

def bump_timeout(self, timeout=None):

693

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

484

485

def checked_ok(self, timeout=None):

486

"""Bump up the timeout for this client.

487

488

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

489

alive and well.

490

"""

694

491

if timeout is None:

695

492

timeout = self.timeout

493

self.last_checked_ok = datetime.datetime.utcnow()

696

494

if self.disable_initiator_tag is not None:

697

495

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

496

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

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

497

self.disable_initiator_tag = (gobject.timeout_add

498

(_timedelta_to_milliseconds

499

(timeout), self.disable))

702

500

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

703

501

704

502

def need_approval(self):

710

508

If a checker already exists, leave it running and do

711

509

nothing."""

712

510

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

713

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

714

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

715

# would inevitably timeout, since no checker would get a

716

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

511

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

512

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

513

# client would inevitably timeout, since no checker would get

514

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

717

515

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

718

516

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

719

517

# should be.

720

518

721

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

722

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

723

self.checker.join()

724

self.checker = None

519

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

520

try:

521

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

522

except (AttributeError, OSError) as error:

523

if (isinstance(error, OSError)

524

and error.errno != errno.ECHILD):

525

raise error

526

else:

527

if pid:

528

logger.warning("Checker was a zombie")

529

gobject.source_remove(self.checker_callback_tag)

530

self.checker_callback(pid, status,

531

self.current_checker_command)

725

532

# Start a new checker if needed

726

533

if self.checker is None:

727

# Escape attributes for the shell

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

731

534

try:

732

command = self.checker_command % escaped_attrs

733

except TypeError as error:

734

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

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

535

# In case checker_command has exactly one % operator

536

command = self.checker_command % self.host

537

except TypeError:

538

# Escape attributes for the shell

539

escaped_attrs = dict(

540

(attr,

541

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

542

errors=

543

'replace')))

544

for attr in

545

self.runtime_expansions)

546

547

try:

548

command = self.checker_command % escaped_attrs

549

except TypeError as error:

550

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

551

' %s', self.checker_command, error)

552

return True # Try again later

738

553

self.current_checker_command = command

739

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

740

self.name)

741

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

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

763

self.checker_callback, pipe[0], command)

554

try:

555

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

556

command, self.name)

557

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

558

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

559

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

560

# always replaced by /dev/null.)

561

self.checker = subprocess.Popen(command,

562

close_fds=True,

563

shell=True, cwd="/")

564

self.checker_callback_tag = (gobject.child_watch_add

565

(self.checker.pid,

566

self.checker_callback,

567

data=command))

568

# The checker may have completed before the gobject

569

# watch was added. Check for this.

570

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

571

if pid:

572

gobject.source_remove(self.checker_callback_tag)

573

self.checker_callback(pid, status, command)

574

except OSError as error:

575

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

576

error)

764

577

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

765

578

return True

766

579

772

585

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

773

586

return

774

587

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

775

self.checker.terminate()

588

try:

589

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

590

#time.sleep(0.5)

591

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

592

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

593

except OSError as error:

594

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

595

raise

776

596

self.checker = None

777

597

778

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

598

# Encrypts a client secret and stores it in a varible

599

# encrypted_secret

600

def encrypt_secret(self, key):

601

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

602

# supplied key

603

hasheng = hashlib.sha256()

604

hasheng.update(key)

605

encryptionkey = hasheng.digest()

606

607

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

608

# sucessful

609

hasheng = hashlib.sha256()

610

hasheng.update(self.secret)

611

validationhash = hasheng.digest()

612

613

# Encrypt secret

614

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

615

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

616

Crypto.Cipher.AES.MODE_CFB, iv)

617

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

618

self.encrypted_secret = (ciphertext, iv)

619

620

# Decrypt a encrypted client secret

621

def decrypt_secret(self, key):

622

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

623

# supplied key

624

hasheng = hashlib.sha256()

625

hasheng.update(key)

626

encryptionkey = hasheng.digest()

627

628

# Decrypt encrypted secret

629

ciphertext, iv = self.encrypted_secret

630

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

631

Crypto.Cipher.AES.MODE_CFB, iv)

632

plain = ciphereng.decrypt(ciphertext)

633

634

# Validate decrypted secret to know if it was succesful

635

hasheng = hashlib.sha256()

636

validationhash = plain[:hasheng.digest_size]

637

secret = plain[hasheng.digest_size:]

638

hasheng.update(secret)

639

640

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

641

# use the decrypted secret

642

if hasheng.digest() == validationhash:

643

self.secret = secret

644

else:

645

self.secret = key

646

del self.encrypted_secret

647

648

649

def dbus_service_property(dbus_interface, signature="v",

650

access="readwrite", byte_arrays=False):

783

651

"""Decorators for marking methods of a DBusObjectWithProperties to

784

652

become properties on the D-Bus.

785

653

794

662

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

795

663

if byte_arrays and signature != "ay":

796

664

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

797

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

798

665

" signature %r" % signature)

799

666

def decorator(func):

800

667

func._dbus_is_property = True

801

668

func._dbus_interface = dbus_interface

806

673

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

807

674

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

808

675

return func

809

810

return decorator

811

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

831

return decorator

832

833

834

def dbus_annotations(annotations):

835

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

836

Usage:

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

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

842

access="r")

843

def Property_dbus_property(self):

844

return dbus.Boolean(False)

845

"""

846

847

def decorator(func):

848

func._dbus_annotations = annotations

849

return func

850

851

676

return decorator

852

677

853

678

854

679

class DBusPropertyException(dbus.exceptions.DBusException):

855

680

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

856

681

"""

857

pass

682

def __unicode__(self):

683

return unicode(str(self))

858

684

859

685

860

686

class DBusPropertyAccessException(DBusPropertyException):

878

704

"""

879

705

880

706

@staticmethod

881

def _is_dbus_thing(thing):

882

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

883

884

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

885

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

886

"""

887

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

888

False)

707

def _is_dbus_property(obj):

708

return getattr(obj, "_dbus_is_property", False)

889

709

890

def _get_all_dbus_things(self, thing):

710

def _get_all_dbus_properties(self):

891

711

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

892

712

"""

893

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

894

athing.__get__(self))

713

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

895

714

for cls in self.__class__.__mro__

896

for name, athing in

897

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

715

for name, prop in

716

inspect.getmembers(cls, self._is_dbus_property))

898

717

899

718

def _get_dbus_property(self, interface_name, property_name):

900

719

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

901

720

property with the specified name and interface.

902

721

"""

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

722

for cls in self.__class__.__mro__:

723

for name, value in (inspect.getmembers

724

(cls, self._is_dbus_property)):

906

725

if (value._dbus_name == property_name

907

726

and value._dbus_interface == interface_name):

908

727

return value.__get__(self)

909

728

910

729

# No such property

911

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

912

self.dbus_object_path, interface_name, property_name))

730

raise DBusPropertyNotFound(self.dbus_object_path + ":"

731

+ interface_name + "."

732

+ property_name)

913

733

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

734

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

916

735

out_signature="v")

917

736

def Get(self, interface_name, property_name):

918

737

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

936

755

# The byte_arrays option is not supported yet on

937

756

# signatures other than "ay".

938

757

if prop._dbus_signature != "ay":

939

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

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

758

raise ValueError

759

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

760

for byte in value))

944

761

prop(value)

945

762

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

763

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

948

764

out_signature="a{sv}")

949

765

def GetAll(self, interface_name):

950

766

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

952

768

953

769

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

954

770

"""

955

properties = {}

956

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

771

all = {}

772

for name, prop in self._get_all_dbus_properties():

957

773

if (interface_name

958

774

and interface_name != prop._dbus_interface):

959

775

# Interface non-empty but did not match

963

779

continue

964

780

value = prop()

965

781

if not hasattr(value, "variant_level"):

966

properties[name] = value

782

all[name] = value

967

783

continue

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

970

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

971

972

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

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

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

976

standard.

977

"""

978

pass

784

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

785

value.variant_level+1)

786

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

979

787

980

788

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

789

out_signature="s",

982

790

path_keyword='object_path',

983

791

connection_keyword='connection')

984

792

def Introspect(self, object_path, connection):

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

793

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

988

794

"""

989

795

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

990

796

connection)

991

797

try:

992

798

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

993

994

799

def make_tag(document, name, prop):

995

800

e = document.createElement("property")

996

801

e.setAttribute("name", name)

997

802

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

998

803

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

999

804

return e

1000

1001

805

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

1002

# Add property tags

1003

806

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

1004

807

for name, prop

1005

in self._get_all_dbus_things("property")

808

in self._get_all_dbus_properties()

1006

809

if prop._dbus_interface

1007

810

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

1008

811

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1038

812

# Add the names to the return values for the

1039

813

# "org.freedesktop.DBus.Properties" methods

1040

814

if (if_tag.getAttribute("name")

1055

829

except (AttributeError, xml.dom.DOMException,

1056

830

xml.parsers.expat.ExpatError) as error:

1057

831

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

1058

exc_info=error)

832

error)

1059

833

return xmlstring

1060

834

1061

835

1062

def datetime_to_dbus(dt, variant_level=0):

836

def datetime_to_dbus (dt, variant_level=0):

1063

837

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

1064

838

if dt is None:

1065

839

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

1066

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

1067

1068

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1070

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

1071

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

1072

interface names according to the "alt_interface_names" mapping.

1073

Usage:

1074

1075

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

1076

"net.example.AlternateInterface"})

1077

class SampleDBusObject(dbus.service.Object):

1078

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

1079

def SampleDBusMethod():

1080

pass

1081

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

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

1084

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

1085

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

1086

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

1087

1088

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

1089

(from DBusObjectWithProperties) and interfaces (from the

1090

dbus_interface_annotations decorator).

840

return dbus.String(dt.isoformat(),

841

variant_level=variant_level)

842

843

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

844

.__metaclass__):

845

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

846

will add additional D-Bus attributes matching a certain pattern.

1091

847

"""

1092

1093

def wrapper(cls):

1094

for orig_interface_name, alt_interface_name in (

1095

alt_interface_names.items()):

1096

attr = {}

1097

interface_names = set()

1098

# Go though all attributes of the class

1099

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

848

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

849

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

850

# methods, signals, or properties in them

851

for base in (b for b in bases

852

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

853

# Go though all attributes of the base class

854

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

1100

855

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

1101

856

# with the wrong interface name

1102

857

if (not hasattr(attribute, "_dbus_interface")

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

858

or not attribute._dbus_interface

859

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

1105

860

continue

1106

861

# Create an alternate D-Bus interface name based on

1107

862

# the current name

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

863

alt_interface = (attribute._dbus_interface

864

.replace("se.recompile.Mandos",

865

"se.bsnet.fukt.Mandos"))

1111

866

# Is this a D-Bus signal?

1112

867

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

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

868

# Extract the original non-method function by

869

# black magic

870

nonmethod_func = (dict(

1117

871

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

872

attribute.__closure__))["func"]

873

.cell_contents)

1122

874

# Create a new, but exactly alike, function

1123

875

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

1124

876

# with the alternate D-Bus interface name

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1142

# Copy annotations, if any

1143

try:

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1146

except AttributeError:

1147

pass

877

new_function = (dbus.service.signal

878

(alt_interface,

879

attribute._dbus_signature)

880

(types.FunctionType(

881

nonmethod_func.func_code,

882

nonmethod_func.func_globals,

883

nonmethod_func.func_name,

884

nonmethod_func.func_defaults,

885

nonmethod_func.func_closure)))

1148

886

# Define a creator of a function to call both the

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

887

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

888

# signals gets sent when the function is called

1152

889

def fixscope(func1, func2):

1153

890

"""This function is a scope container to pass

1154

891

func1 and func2 to the "call_both" function

1155

892

outside of its arguments"""

1156

1157

893

def call_both(*args, **kwargs):

1158

894

"""This function will emit two D-Bus

1159

895

signals by calling func1 and func2"""

1160

896

func1(*args, **kwargs)

1161

897

func2(*args, **kwargs)

1162

1163

898

return call_both

1164

899

# Create the "call_both" function and add it to

1165

900

# the class

1166

attr[attrname] = fixscope(attribute, new_function)

901

attr[attrname] = fixscope(attribute,

902

new_function)

1167

903

# Is this a D-Bus method?

1168

904

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

1169

905

# Create a new, but exactly alike, function

1170

906

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

1171

907

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

1172

908

# to the class.

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1187

except AttributeError:

1188

pass

909

attr[attrname] = (dbus.service.method

910

(alt_interface,

911

attribute._dbus_in_signature,

912

attribute._dbus_out_signature)

913

(types.FunctionType

914

(attribute.func_code,

915

attribute.func_globals,

916

attribute.func_name,

917

attribute.func_defaults,

918

attribute.func_closure)))

1189

919

# Is this a D-Bus property?

1190

920

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

1191

921

# Create a new, but exactly alike, function

1192

922

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

1193

923

# property with the alternate D-Bus interface

1194

924

# name. Add it to the class.

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1206

# Copy annotations, if any

1207

try:

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1210

except AttributeError:

1211

pass

1212

# Is this a D-Bus interface?

1213

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

1214

# Create a new, but exactly alike, function

1215

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

1216

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

1217

# to the class.

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1225

if deprecate:

1226

# Deprecate all alternate interfaces

1227

iname="_AlternateDBusNames_interface_annotation{}"

1228

for interface_name in interface_names:

1229

1230

@dbus_interface_annotations(interface_name)

1231

def func(self):

1232

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

1233

"true" }

1234

# Find an unused name

1235

for aname in (iname.format(i)

1236

for i in itertools.count()):

1237

if aname not in attr:

1238

attr[aname] = func

1239

break

1240

if interface_names:

1241

# Replace the class with a new subclass of it with

1242

# methods, signals, etc. as created above.

1243

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

1244

(cls, ), attr)

1245

return cls

1246

1247

return wrapper

1248

1249

1250

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

1251

"se.bsnet.fukt.Mandos"})

925

attr[attrname] = (dbus_service_property

926

(alt_interface,

927

attribute._dbus_signature,

928

attribute._dbus_access,

929

attribute

930

._dbus_get_args_options

931

["byte_arrays"])

932

(types.FunctionType

933

(attribute.func_code,

934

attribute.func_globals,

935

attribute.func_name,

936

attribute.func_defaults,

937

attribute.func_closure)))

938

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

939

1252

940

class ClientDBus(Client, DBusObjectWithProperties):

1253

941

"""A Client class using D-Bus

1254

942

1258

946

"""

1259

947

1260

948

runtime_expansions = (Client.runtime_expansions

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

949

+ ("dbus_object_path",))

1264

950

1265

951

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

1266

952

1267

953

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

1268

954

self.bus = bus

955

self._approvals_pending = 0

1269

956

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

957

self.add_to_dbus()

958

959

def add_to_dbus(self):

1270

960

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

1271

961

# the D-Bus

1272

client_object_name = str(self.name).translate(

962

client_object_name = unicode(self.name).translate(

1273

963

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

1274

964

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

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

965

self.dbus_object_path = (dbus.ObjectPath

966

("/clients/" + client_object_name))

1277

967

DBusObjectWithProperties.__init__(self, self.bus,

1278

968

self.dbus_object_path)

1279

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

969

970

def notifychangeproperty(transform_func,

971

dbus_name, type_func=lambda x: x,

972

variant_level=1):

1285

973

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

1286

974

its changes to DBus.

1287

975

1288

976

transform_fun: Function that takes a value and a variant_level

1289

977

and transforms it to a D-Bus type.

1290

978

dbus_name: D-Bus name of the variable

1292

980

to the D-Bus. Default: no transform

1293

981

variant_level: D-Bus variant level. Default: 1

1294

982

"""

1295

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

1296

983

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

1297

984

def setter(self, value):

1298

985

if hasattr(self, "dbus_object_path"):

1299

986

if (not hasattr(self, attrname) or

1300

987

type_func(getattr(self, attrname, None))

1301

988

!= type_func(value)):

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

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

1315

dbus_value }),

1316

dbus.Array())

989

dbus_value = transform_func(type_func(value),

990

variant_level

991

=variant_level)

992

self.PropertyChanged(dbus.String(dbus_name),

993

dbus_value)

1317

994

setattr(self, attrname, value)

1318

995

1319

996

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

1320

997

998

1321

999

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

1000

approvals_pending = notifychangeproperty(dbus.Boolean,

1323

1001

"ApprovalPending",

1325

1003

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

1326

1004

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

1005

"LastEnabled")

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1006

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

1007

type_func = lambda checker:

1008

checker is not None)

1331

1009

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

1010

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1335

1011

last_approval_request = notifychangeproperty(

1336

1012

datetime_to_dbus, "LastApprovalRequest")

1337

1013

approved_by_default = notifychangeproperty(dbus.Boolean,

1338

1014

"ApprovedByDefault")

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1015

approval_delay = notifychangeproperty(dbus.UInt16,

1016

"ApprovalDelay",

1017

type_func =

1018

_timedelta_to_milliseconds)

1342

1019

approval_duration = notifychangeproperty(

1343

dbus.UInt64, "ApprovalDuration",

1344

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

1020

dbus.UInt16, "ApprovalDuration",

1021

type_func = _timedelta_to_milliseconds)

1345

1022

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

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1023

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

1024

type_func =

1025

_timedelta_to_milliseconds)

1349

1026

extended_timeout = notifychangeproperty(

1350

dbus.UInt64, "ExtendedTimeout",

1351

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

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

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

1027

dbus.UInt16, "ExtendedTimeout",

1028

type_func = _timedelta_to_milliseconds)

1029

interval = notifychangeproperty(dbus.UInt16,

1030

"Interval",

1031

type_func =

1032

_timedelta_to_milliseconds)

1355

1033

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

1356

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

1357

invalidate_only=True)

1358

1034

1359

1035

del notifychangeproperty

1360

1036

1367

1043

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

1368

1044

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

1369

1045

1370

def checker_callback(self, source, condition,

1371

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

1372

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

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

1046

def checker_callback(self, pid, condition, command,

1047

*args, **kwargs):

1048

self.checker_callback_tag = None

1049

self.checker = None

1050

if os.WIFEXITED(condition):

1051

exitstatus = os.WEXITSTATUS(condition)

1377

1052

# Emit D-Bus signal

1378

1053

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

1054

dbus.Int64(condition),

1380

1055

dbus.String(command))

1381

1056

else:

1382

1057

# Emit D-Bus signal

1383

1058

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

1384

dbus.Int64(

1385

self.last_checker_signal),

1059

dbus.Int64(condition),

1386

1060

dbus.String(command))

1387

return ret

1061

1062

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

1063

*args, **kwargs)

1388

1064

1389

1065

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

1390

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

1066

old_checker = self.checker

1067

if self.checker is not None:

1068

old_checker_pid = self.checker.pid

1069

else:

1070

old_checker_pid = None

1391

1071

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

1392

1072

# Only if new checker process was started

1393

1073

if (self.checker is not None

1397

1077

return r

1398

1078

1399

1079

def _reset_approved(self):

1400

self.approved = None

1080

self._approved = None

1401

1081

return False

1402

1082

1403

1083

def approve(self, value=True):

1404

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

1407

1084

self.send_changedstate()

1085

self._approved = value

1086

gobject.timeout_add(_timedelta_to_milliseconds

1087

(self.approval_duration),

1088

self._reset_approved)

1089

1408

1090

1409

1091

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1092

_interface = "se.recompile.Mandos.Client"

1412

1093

1413

1094

## Signals

1414

1095

1425

1106

pass

1426

1107

1427

1108

# PropertyChanged - signal

1428

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

1429

1109

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

1430

1110

def PropertyChanged(self, property, value):

1431

1111

"D-Bus signal"

1495

1175

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

1496

1176

1497

1177

# ApprovedByDefault - property

1498

@dbus_service_property(_interface,

1499

signature="b",

1178

@dbus_service_property(_interface, signature="b",

1500

1179

access="readwrite")

1501

1180

def ApprovedByDefault_dbus_property(self, value=None):

1502

1181

if value is None: # get

1504

1183

self.approved_by_default = bool(value)

1505

1184

1506

1185

# ApprovalDelay - property

1507

@dbus_service_property(_interface,

1508

signature="t",

1186

@dbus_service_property(_interface, signature="t",

1509

1187

access="readwrite")

1510

1188

def ApprovalDelay_dbus_property(self, value=None):

1511

1189

if value is None: # get

1512

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

1513

* 1000)

1190

return dbus.UInt64(self.approval_delay_milliseconds())

1514

1191

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

1515

1192

1516

1193

# ApprovalDuration - property

1517

@dbus_service_property(_interface,

1518

signature="t",

1194

@dbus_service_property(_interface, signature="t",

1519

1195

access="readwrite")

1520

1196

def ApprovalDuration_dbus_property(self, value=None):

1521

1197

if value is None: # get

1522

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

1523

* 1000)

1198

return dbus.UInt64(_timedelta_to_milliseconds(

1199

self.approval_duration))

1524

1200

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

1525

1201

1526

1202

# Name - property

1534

1210

return dbus.String(self.fingerprint)

1535

1211

1536

1212

# Host - property

1537

@dbus_service_property(_interface,

1538

signature="s",

1213

@dbus_service_property(_interface, signature="s",

1539

1214

access="readwrite")

1540

1215

def Host_dbus_property(self, value=None):

1541

1216

if value is None: # get

1542

1217

return dbus.String(self.host)

1543

self.host = str(value)

1218

self.host = value

1544

1219

1545

1220

# Created - property

1546

1221

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

1547

1222

def Created_dbus_property(self):

1548

return datetime_to_dbus(self.created)

1223

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

1549

1224

1550

1225

# LastEnabled - property

1551

1226

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

1553

1228

return datetime_to_dbus(self.last_enabled)

1554

1229

1555

1230

# Enabled - property

1556

@dbus_service_property(_interface,

1557

signature="b",

1231

@dbus_service_property(_interface, signature="b",

1558

1232

access="readwrite")

1559

1233

def Enabled_dbus_property(self, value=None):

1560

1234

if value is None: # get

1565

1239

self.disable()

1566

1240

1567

1241

# LastCheckedOK - property

1568

@dbus_service_property(_interface,

1569

signature="s",

1242

@dbus_service_property(_interface, signature="s",

1570

1243

access="readwrite")

1571

1244

def LastCheckedOK_dbus_property(self, value=None):

1572

1245

if value is not None:

1574

1247

return

1575

1248

return datetime_to_dbus(self.last_checked_ok)

1576

1249

1577

# LastCheckerStatus - property

1578

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

1579

def LastCheckerStatus_dbus_property(self):

1580

return dbus.Int16(self.last_checker_status)

1581

1582

1250

# Expires - property

1583

1251

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

1584

1252

def Expires_dbus_property(self):

1590

1258

return datetime_to_dbus(self.last_approval_request)

1591

1259

1592

1260

# Timeout - property

1593

@dbus_service_property(_interface,

1594

signature="t",

1261

@dbus_service_property(_interface, signature="t",

1595

1262

access="readwrite")

1596

1263

def Timeout_dbus_property(self, value=None):

1597

1264

if value is None: # get

1598

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

1599

old_timeout = self.timeout

1265

return dbus.UInt64(self.timeout_milliseconds())

1600

1266

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

1601

# Reschedule disabling

1602

if self.enabled:

1603

now = datetime.datetime.utcnow()

1604

self.expires += self.timeout - old_timeout

1605

if self.expires <= now:

1606

# The timeout has passed

1607

self.disable()

1608

else:

1609

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

1610

is None):

1611

return

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

1614

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

1615

self.disable)

1267

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

1268

return

1269

# Reschedule timeout

1270

gobject.source_remove(self.disable_initiator_tag)

1271

self.disable_initiator_tag = None

1272

self.expires = None

1273

time_to_die = _timedelta_to_milliseconds((self

1274

.last_checked_ok

1275

+ self.timeout)

1276

- datetime.datetime

1277

.utcnow())

1278

if time_to_die <= 0:

1279

# The timeout has passed

1280

self.disable()

1281

else:

1282

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

1283

+ datetime.timedelta(milliseconds =

1284

time_to_die))

1285

self.disable_initiator_tag = (gobject.timeout_add

1286

(time_to_die, self.disable))

1616

1287

1617

1288

# ExtendedTimeout - property

1618

@dbus_service_property(_interface,

1619

signature="t",

1289

@dbus_service_property(_interface, signature="t",

1620

1290

access="readwrite")

1621

1291

def ExtendedTimeout_dbus_property(self, value=None):

1622

1292

if value is None: # get

1623

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

1624

* 1000)

1293

return dbus.UInt64(self.extended_timeout_milliseconds())

1625

1294

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

1626

1295

1627

1296

# Interval - property

1628

@dbus_service_property(_interface,

1629

signature="t",

1297

@dbus_service_property(_interface, signature="t",

1630

1298

access="readwrite")

1631

1299

def Interval_dbus_property(self, value=None):

1632

1300

if value is None: # get

1633

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

1301

return dbus.UInt64(self.interval_milliseconds())

1634

1302

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

1635

1303

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

1636

1304

return

1637

if self.enabled:

1638

# Reschedule checker run

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1305

# Reschedule checker run

1306

gobject.source_remove(self.checker_initiator_tag)

1307

self.checker_initiator_tag = (gobject.timeout_add

1308

(value, self.start_checker))

1309

self.start_checker() # Start one now, too

1643

1310

1644

1311

# Checker - property

1645

@dbus_service_property(_interface,

1646

signature="s",

1312

@dbus_service_property(_interface, signature="s",

1647

1313

access="readwrite")

1648

1314

def Checker_dbus_property(self, value=None):

1649

1315

if value is None: # get

1650

1316

return dbus.String(self.checker_command)

1651

self.checker_command = str(value)

1317

self.checker_command = value

1652

1318

1653

1319

# CheckerRunning - property

1654

@dbus_service_property(_interface,

1655

signature="b",

1320

@dbus_service_property(_interface, signature="b",

1656

1321

access="readwrite")

1657

1322

def CheckerRunning_dbus_property(self, value=None):

1658

1323

if value is None: # get

1668

1333

return self.dbus_object_path # is already a dbus.ObjectPath

1669

1334

1670

1335

# Secret = property

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1336

@dbus_service_property(_interface, signature="ay",

1337

access="write", byte_arrays=True)

1675

1338

def Secret_dbus_property(self, value):

1676

self.secret = bytes(value)

1339

self.secret = str(value)

1677

1340

1678

1341

del _interface

1679

1342

1683

1346

self._pipe = child_pipe

1684

1347

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

1685

1348

if not self._pipe.recv():

1686

raise KeyError(fpr)

1349

raise KeyError()

1687

1350

1688

1351

def __getattribute__(self, name):

1689

if name == '_pipe':

1352

if(name == '_pipe'):

1690

1353

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

1691

1354

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

1692

1355

data = self._pipe.recv()

1693

1356

if data[0] == 'data':

1694

1357

return data[1]

1695

1358

if data[0] == 'function':

1696

1697

1359

def func(*args, **kwargs):

1698

1360

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

1699

1361

return self._pipe.recv()[1]

1700

1701

1362

return func

1702

1363

1703

1364

def __setattr__(self, name, value):

1704

if name == '_pipe':

1365

if(name == '_pipe'):

1705

1366

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

1706

1367

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

1707

1368

1369

class ClientDBusTransitional(ClientDBus):

1370

__metaclass__ = AlternateDBusNamesMetaclass

1708

1371

1709

1372

class ClientHandler(socketserver.BaseRequestHandler, object):

1710

1373

"""A class to handle client connections.

1715

1378

def handle(self):

1716

1379

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

1717

1380

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

1718

str(self.client_address))

1381

unicode(self.client_address))

1719

1382

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

1720

1383

self.server.child_pipe.fileno())

1721

1384

1722

session = gnutls.connection.ClientSession(

1723

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

1385

session = (gnutls.connection

1386

.ClientSession(self.request,

1387

gnutls.connection

1388

.X509Credentials()))

1724

1389

1725

1390

# Note: gnutls.connection.X509Credentials is really a

1726

1391

# generic GnuTLS certificate credentials object so long as

1735

1400

priority = self.server.gnutls_priority

1736

1401

if priority is None:

1737

1402

priority = "NORMAL"

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1403

(gnutls.library.functions

1404

.gnutls_priority_set_direct(session._c_object,

1405

priority, None))

1740

1406

1741

1407

# Start communication using the Mandos protocol

1742

1408

# Get protocol number

1744

1410

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

1745

1411

try:

1746

1412

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

1747

raise RuntimeError(line)

1413

raise RuntimeError

1748

1414

except (ValueError, IndexError, RuntimeError) as error:

1749

1415

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

1750

1416

return

1762

1428

approval_required = False

1763

1429

try:

1764

1430

try:

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1431

fpr = self.fingerprint(self.peer_certificate

1432

(session))

1767

1433

except (TypeError,

1768

1434

gnutls.errors.GNUTLSError) as error:

1769

1435

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

1784

1450

while True:

1785

1451

if not client.enabled:

1786

1452

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

1787

client.name)

1453

client.name)

1788

1454

if self.server.use_dbus:

1789

1455

# Emit D-Bus signal

1790

1456

client.Rejected("Disabled")

1791

1457

return

1792

1458

1793

if client.approved or not client.approval_delay:

1459

if client._approved or not client.approval_delay:

1794

1460

#We are approved or approval is disabled

1795

1461

break

1796

elif client.approved is None:

1462

elif client._approved is None:

1797

1463

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

1798

1464

client.name)

1799

1465

if self.server.use_dbus:

1800

1466

# Emit D-Bus signal

1801

1467

client.NeedApproval(

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1468

client.approval_delay_milliseconds(),

1469

client.approved_by_default)

1804

1470

else:

1805

1471

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

1806

1472

client.name)

1812

1478

#wait until timeout or approved

1813

1479

time = datetime.datetime.now()

1814

1480

client.changedstate.acquire()

1815

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

1481

(client.changedstate.wait

1482

(float(client._timedelta_to_milliseconds(delay)

1483

/ 1000)))

1816

1484

client.changedstate.release()

1817

1485

time2 = datetime.datetime.now()

1818

1486

if (time2 - time) >= delay:

1834

1502

try:

1835

1503

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

1836

1504

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1505

logger.warning("gnutls send failed")

1839

1506

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1507

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

1508

sent, len(client.secret)

1509

- (sent_size + sent))

1843

1510

sent_size += sent

1844

1511

1845

1512

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

1846

1513

# bump the timeout using extended_timeout

1847

client.bump_timeout(client.extended_timeout)

1514

client.checked_ok(client.extended_timeout)

1848

1515

if self.server.use_dbus:

1849

1516

# Emit D-Bus signal

1850

1517

client.GotSecret()

1855

1522

try:

1856

1523

session.bye()

1857

1524

except gnutls.errors.GNUTLSError as error:

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1525

logger.warning("GnuTLS bye failed")

1860

1526

1861

1527

@staticmethod

1862

1528

def peer_certificate(session):

1863

1529

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

1864

1530

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1531

if (gnutls.library.functions

1532

.gnutls_certificate_type_get(session._c_object)

1867

1533

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

1534

# ...do the normal thing

1869

1535

return session.peer_certificate

1883

1549

def fingerprint(openpgp):

1884

1550

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1885

1551

# New GnuTLS "datum" with the OpenPGP public key

1886

datum = gnutls.library.types.gnutls_datum_t(

1887

ctypes.cast(ctypes.c_char_p(openpgp),

1888

ctypes.POINTER(ctypes.c_ubyte)),

1889

ctypes.c_uint(len(openpgp)))

1552

datum = (gnutls.library.types

1553

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

1554

ctypes.POINTER

1555

(ctypes.c_ubyte)),

1556

ctypes.c_uint(len(openpgp))))

1890

1557

# New empty GnuTLS certificate

1891

1558

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1559

(gnutls.library.functions

1560

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1894

1561

# Import the OpenPGP public key into the certificate

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1562

(gnutls.library.functions

1563

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

1564

gnutls.library.constants

1565

.GNUTLS_OPENPGP_FMT_RAW))

1898

1566

# Verify the self signature in the key

1899

1567

crtverify = ctypes.c_uint()

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1568

(gnutls.library.functions

1569

.gnutls_openpgp_crt_verify_self(crt, 0,

1570

ctypes.byref(crtverify)))

1902

1571

if crtverify.value != 0:

1903

1572

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1573

raise (gnutls.errors.CertificateSecurityError

1574

("Verify failed"))

1906

1575

# New buffer for the fingerprint

1907

1576

buf = ctypes.create_string_buffer(20)

1908

1577

buf_len = ctypes.c_size_t()

1909

1578

# Get the fingerprint from the certificate into the buffer

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

1579

(gnutls.library.functions

1580

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

1581

ctypes.byref(buf_len)))

1912

1582

# Deinit the certificate

1913

1583

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1914

1584

# Convert the buffer to a Python bytestring

1915

1585

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

1916

1586

# Convert the bytestring to hexadecimal notation

1917

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

1587

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

1918

1588

return hex_fpr

1919

1589

1920

1590

1921

1591

class MultiprocessingMixIn(object):

1922

1592

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

1923

1924

1593

def sub_process_main(self, request, address):

1925

1594

try:

1926

1595

self.finish_request(request, address)

1927

except Exception:

1596

except:

1928

1597

self.handle_error(request, address)

1929

1598

self.close_request(request)

1930

1599

1931

1600

def process_request(self, request, address):

1932

1601

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

1933

1602

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

1934

args = (request, address))

1603

args = (request,

1604

address))

1935

1605

proc.start()

1936

1606

return proc

1937

1607

1938

1608

1939

1609

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1940

1610

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

1941

1942

1611

def process_request(self, request, client_address):

1943

1612

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

1944

1613

1953

1622

1954

1623

def add_pipe(self, parent_pipe, proc):

1955

1624

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

1956

raise NotImplementedError()

1625

raise NotImplementedError

1957

1626

1958

1627

1959

1628

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1965

1634

interface: None or a network interface name (string)

1966

1635

use_ipv6: Boolean; to use IPv6 or not

1967

1636

"""

1968

1969

1637

def __init__(self, server_address, RequestHandlerClass,

1970

interface=None,

1971

use_ipv6=True,

1972

socketfd=None):

1973

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

1974

creating a new one with socket.socket().

1975

"""

1638

interface=None, use_ipv6=True):

1976

1639

self.interface = interface

1977

1640

if use_ipv6:

1978

1641

self.address_family = socket.AF_INET6

1979

if socketfd is not None:

1980

# Save the file descriptor

1981

self.socketfd = socketfd

1982

# Save the original socket.socket() function

1983

self.socket_socket = socket.socket

1984

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

1985

#

1986

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

1987

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

1988

# patching socket.socket.)

1989

#

1990

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

1991

@functools.wraps(socket.socket)

1992

def socket_wrapper(*args, **kwargs):

1993

# Restore original function so subsequent calls are

1994

# not affected.

1995

socket.socket = self.socket_socket

1996

del self.socket_socket

1997

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

1998

# saved file descriptor.

1999

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

2000

# Replace socket.socket() function with wrapper

2001

socket.socket = socket_wrapper

2002

# The socketserver.TCPServer.__init__ will call

2003

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

2004

# socket_wrapper(), if socketfd was set.

2005

1642

socketserver.TCPServer.__init__(self, server_address,

2006

1643

RequestHandlerClass)

2007

2008

1644

def server_bind(self):

2009

1645

"""This overrides the normal server_bind() function

2010

1646

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

2016

1652

self.interface)

2017

1653

else:

2018

1654

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1655

self.socket.setsockopt(socket.SOL_SOCKET,

1656

SO_BINDTODEVICE,

1657

str(self.interface

1658

+ '\0'))

2022

1659

except socket.error as error:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

1660

if error[0] == errno.EPERM:

1661

logger.error("No permission to"

1662

" bind to interface %s",

1663

self.interface)

1664

elif error[0] == errno.ENOPROTOOPT:

2027

1665

logger.error("SO_BINDTODEVICE not available;"

2028

1666

" cannot bind to interface %s",

2029

1667

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

1668

else:

2034

1669

raise

2035

1670

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

2038

1673

if self.address_family == socket.AF_INET6:

2039

1674

any_address = "::" # in6addr_any

2040

1675

else:

2041

any_address = "0.0.0.0" # INADDR_ANY

1676

any_address = socket.INADDR_ANY

2042

1677

self.server_address = (any_address,

2043

1678

self.server_address[1])

2044

1679

elif not self.server_address[1]:

2045

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

1680

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

1681

0)

2046

1682

# if self.interface:

2047

1683

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

2048

1684

# 0, # port

2062

1698

2063

1699

Assumes a gobject.MainLoop event loop.

2064

1700

"""

2065

2066

1701

def __init__(self, server_address, RequestHandlerClass,

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

1702

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

1703

gnutls_priority=None, use_dbus=True):

2073

1704

self.enabled = False

2074

1705

self.clients = clients

2075

1706

if self.clients is None:

2079

1710

IPv6_TCPServer.__init__(self, server_address,

2080

1711

RequestHandlerClass,

2081

1712

interface = interface,

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1713

use_ipv6 = use_ipv6)

2085

1714

def server_activate(self):

2086

1715

if self.enabled:

2087

1716

return socketserver.TCPServer.server_activate(self)

2091

1720

2092

1721

def add_pipe(self, parent_pipe, proc):

2093

1722

# Call "handle_ipc" for both data and EOF events

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2097

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

proc = proc))

1723

gobject.io_add_watch(parent_pipe.fileno(),

1724

gobject.IO_IN | gobject.IO_HUP,

1725

functools.partial(self.handle_ipc,

1726

parent_pipe =

1727

parent_pipe,

1728

proc = proc))

2100

1729

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

1730

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

1731

proc = None, client_object=None):

1732

condition_names = {

1733

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

1734

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

1735

# blocking).

1736

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

1737

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

1738

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

1739

# broken, usually for pipes and

1740

# sockets).

1741

}

1742

conditions_string = ' | '.join(name

1743

for cond, name in

1744

condition_names.iteritems()

1745

if cond & condition)

2105

1746

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

2106

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

1747

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

2107

1748

# Wait for other process to exit

2108

1749

proc.join()

2109

1750

return False

2130

1771

parent_pipe.send(False)

2131

1772

return False

2132

1773

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2136

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

1774

gobject.io_add_watch(parent_pipe.fileno(),

1775

gobject.IO_IN | gobject.IO_HUP,

1776

functools.partial(self.handle_ipc,

1777

parent_pipe =

1778

parent_pipe,

1779

proc = proc,

1780

client_object =

1781

client))

2140

1782

parent_pipe.send(True)

2141

1783

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

2142

1784

# same fileno

2148

1790

2149

1791

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

2150

1792

funcname)(*args,

2151

**kwargs)))

1793

**kwargs)))

2152

1794

2153

1795

if command == 'getattr':

2154

1796

attrname = request[1]

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1797

if callable(client_object.__getattribute__(attrname)):

1798

parent_pipe.send(('function',))

2158

1799

else:

2159

parent_pipe.send((

2160

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

1800

parent_pipe.send(('data', client_object

1801

.__getattribute__(attrname)))

2161

1802

2162

1803

if command == 'setattr':

2163

1804

attrname = request[1]

2167

1808

return True

2168

1809

2169

1810

2170

def rfc3339_duration_to_delta(duration):

2171

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

2172

2173

>>> rfc3339_duration_to_delta("P7D")

2174

datetime.timedelta(7)

2175

>>> rfc3339_duration_to_delta("PT60S")

2176

datetime.timedelta(0, 60)

2177

>>> rfc3339_duration_to_delta("PT60M")

2178

datetime.timedelta(0, 3600)

2179

>>> rfc3339_duration_to_delta("PT24H")

2180

datetime.timedelta(1)

2181

>>> rfc3339_duration_to_delta("P1W")

2182

datetime.timedelta(7)

2183

>>> rfc3339_duration_to_delta("PT5M30S")

2184

datetime.timedelta(0, 330)

2185

>>> rfc3339_duration_to_delta("P1DT3M20S")

2186

datetime.timedelta(1, 200)

2187

"""

2188

2189

# Parsing an RFC 3339 duration with regular expressions is not

2190

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

2191

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

2192

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

2193

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

2194

# avoid excessive use of external libraries.

2195

2196

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

2197

Token = collections.namedtuple("Token", (

2198

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

2199

# a "group" containing digits

2200

"value", # datetime.timedelta or None

2201

"followers")) # Tokens valid after this token

2202

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

2203

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

2204

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

2205

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

2206

datetime.timedelta(seconds=1),

2207

frozenset((token_end, )))

2208

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

2209

datetime.timedelta(minutes=1),

2210

frozenset((token_second, token_end)))

2211

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

2212

datetime.timedelta(hours=1),

2213

frozenset((token_minute, token_end)))

2214

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

2215

None,

2216

frozenset((token_hour, token_minute,

2217

token_second)))

2218

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

2219

datetime.timedelta(days=1),

2220

frozenset((token_time, token_end)))

2221

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

2222

datetime.timedelta(weeks=4),

2223

frozenset((token_day, token_end)))

2224

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

2225

datetime.timedelta(weeks=52),

2226

frozenset((token_month, token_end)))

2227

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

2228

datetime.timedelta(weeks=1),

2229

frozenset((token_end, )))

2230

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

2231

frozenset((token_year, token_month,

2232

token_day, token_time,

2233

token_week)))

2234

# Define starting values

2235

value = datetime.timedelta() # Value so far

2236

found_token = None

2237

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

2238

s = duration # String left to parse

2239

# Loop until end token is found

2240

while found_token is not token_end:

2241

# Search for any currently valid tokens

2242

for token in followers:

2243

match = token.regexp.match(s)

2244

if match is not None:

2245

# Token found

2246

if token.value is not None:

2247

# Value found, parse digits

2248

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

2249

# Add to value so far

2250

value += factor * token.value

2251

# Strip token from string

2252

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

2253

# Go to found token

2254

found_token = token

2255

# Set valid next tokens

2256

followers = found_token.followers

2257

break

2258

else:

2259

# No currently valid tokens were found

2260

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

2261

.format(duration))

2262

# End token found

2263

return value

2264

2265

2266

1811

def string_to_delta(interval):

2267

1812

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

2268

1813

2279

1824

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

2280

1825

datetime.timedelta(0, 330)

2281

1826

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

2288

1827

timevalue = datetime.timedelta(0)

2289

1828

for s in interval.split():

2290

1829

try:

2291

suffix = s[-1]

1830

suffix = unicode(s[-1])

2292

1831

value = int(s[:-1])

2293

1832

if suffix == "d":

2294

1833

delta = datetime.timedelta(value)

2301

1840

elif suffix == "w":

2302

1841

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

2303

1842

else:

2304

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

2305

except IndexError as e:

1843

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

1844

except (ValueError, IndexError) as e:

2306

1845

raise ValueError(*(e.args))

2307

1846

timevalue += delta

2308

1847

return timevalue

2309

1848

2310

1849

1850

def if_nametoindex(interface):

1851

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

1852

1853

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

1854

global if_nametoindex

1855

try:

1856

if_nametoindex = (ctypes.cdll.LoadLibrary

1857

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

1858

.if_nametoindex)

1859

except (OSError, AttributeError):

1860

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

1861

def if_nametoindex(interface):

1862

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

1863

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

1864

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

1865

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1866

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

1867

interface))

1868

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

1869

ifreq[16:20])[0]

1870

return interface_index

1871

return if_nametoindex(interface)

1872

1873

2311

1874

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

2312

1875

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

2313

1876

2321

1884

sys.exit()

2322

1885

if not noclose:

2323

1886

# Close all standard open file descriptors

2324

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

1887

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

2325

1888

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

2326

1889

raise OSError(errno.ENODEV,

2327

"{} not a character device"

2328

.format(os.devnull))

1890

"%s not a character device"

1891

% os.path.devnull)

2329

1892

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

2330

1893

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

2331

1894

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

2340

1903

2341

1904

parser = argparse.ArgumentParser()

2342

1905

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

2343

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

1906

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

2344

1907

help="show version number and exit")

2345

1908

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

2346

1909

help="Bind to interface IF")

2352

1915

help="Run self-test")

2353

1916

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

2354

1917

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

2355

" to terminal", default=None)

1918

" to terminal")

2356

1919

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

2357

1920

help="Debug level for stdout output")

2358

1921

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

2365

1928

" files")

2366

1929

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

2367

1930

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

2368

" system bus interface", default=None)

1931

" system bus interface")

2369

1932

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

2370

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

2371

default=None)

1933

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

2372

1934

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

2373

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

2374

" state", default=None)

2375

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

2376

help="Specify a file descriptor to a network"

2377

" socket to use instead of creating one")

2378

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

2379

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

2380

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

2381

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

2382

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

2383

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

2384

default=None)

2385

1935

dest="restore",

1936

help="Do not restore stored state",

1937

default=True)

1938

2386

1939

options = parser.parse_args()

2387

1940

2388

1941

if options.check:

2389

1942

import doctest

2390

fail_count, test_count = doctest.testmod()

2391

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

1943

doctest.testmod()

1944

sys.exit()

2392

1945

2393

1946

# Default values for config file for server-global settings

2394

1947

server_defaults = { "interface": "",

2396

1949

"port": "",

2397

1950

"debug": "False",

2398

1951

"priority":

2399

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

2400

":+SIGN-DSA-SHA256",

1952

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

2401

1953

"servicename": "Mandos",

2402

1954

"use_dbus": "True",

2403

1955

"use_ipv6": "True",

2404

1956

"debuglevel": "",

2405

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

1957

}

2411

1958

2412

1959

# Parse config file for server-global settings

2413

1960

server_config = configparser.SafeConfigParser(server_defaults)

2414

1961

del server_defaults

2415

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

1962

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

1963

"mandos.conf"))

2416

1964

# Convert the SafeConfigParser object to a dict

2417

1965

server_settings = server_config.defaults()

2418

1966

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

2419

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

1967

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

2420

1968

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

2421

1969

option)

2422

1970

if server_settings["port"]:

2423

1971

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

2424

1972

"port")

2425

if server_settings["socket"]:

2426

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

2427

"socket")

2428

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

2429

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

2430

# happen with a supplied network socket.

2431

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

2432

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

2433

["socket"])

2434

1973

del server_config

2435

1974

2436

1975

# Override the settings from the config file with command line

2437

1976

# options, if set.

2438

1977

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

2439

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

2440

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

2441

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

1978

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

1979

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

2442

1980

value = getattr(options, option)

2443

1981

if value is not None:

2444

1982

server_settings[option] = value

2445

1983

del options

2446

1984

# Force all strings to be unicode

2447

1985

for option in server_settings.keys():

2448

if isinstance(server_settings[option], bytes):

2449

server_settings[option] = (server_settings[option]

2450

.decode("utf-8"))

2451

# Force all boolean options to be boolean

2452

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

2453

"foreground", "zeroconf"):

2454

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

2455

# Debug implies foreground

2456

if server_settings["debug"]:

2457

server_settings["foreground"] = True

1986

if type(server_settings[option]) is str:

1987

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

2458

1988

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

2459

1989

2460

1990

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

2461

1991

2462

if (not server_settings["zeroconf"]

2463

and not (server_settings["port"]

2464

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

2465

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

2466

2467

1992

# For convenience

2468

1993

debug = server_settings["debug"]

2469

1994

debuglevel = server_settings["debuglevel"]

2470

1995

use_dbus = server_settings["use_dbus"]

2471

1996

use_ipv6 = server_settings["use_ipv6"]

2472

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

2473

stored_state_file)

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2476

2477

if debug:

2478

initlogger(debug, logging.DEBUG)

2479

else:

2480

if not debuglevel:

2481

initlogger(debug)

2482

else:

2483

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

2484

initlogger(debug, level)

2485

1997

2486

1998

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

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

1999

syslogger.setFormatter(logging.Formatter

2000

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

2001

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

2002

% server_settings["servicename"]))

2491

2003

2492

2004

# Parse config file with clients

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

2005

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

2006

"extended_timeout": "15m",

2007

"interval": "2m",

2008

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

2009

"host": "",

2010

"approval_delay": "0s",

2011

"approval_duration": "1s",

2012

}

2013

client_config = configparser.SafeConfigParser(client_defaults)

2495

2014

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

2496

2015

"clients.conf"))

2497

2016

2498

2017

global mandos_dbus_service

2499

2018

mandos_dbus_service = None

2500

2019

2501

socketfd = None

2502

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

2503

socketfd = server_settings["socket"]

2504

tcp_server = MandosServer(

2505

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

2506

ClientHandler,

2507

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

2508

use_ipv6=use_ipv6,

2509

gnutls_priority=server_settings["priority"],

2510

use_dbus=use_dbus,

2511

socketfd=socketfd)

2512

if not foreground:

2513

pidfilename = "/run/mandos.pid"

2514

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

2515

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

2516

pidfile = None

2020

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

2021

server_settings["port"]),

2022

ClientHandler,

2023

interface=(server_settings["interface"]

2024

or None),

2025

use_ipv6=use_ipv6,

2026

gnutls_priority=

2027

server_settings["priority"],

2028

use_dbus=use_dbus)

2029

if not debug:

2030

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

2517

2031

try:

2518

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

2519

except IOError as e:

2520

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

2521

exc_info=e)

2032

pidfile = open(pidfilename, "w")

2033

except IOError:

2034

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

2522

2035

2523

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

2036

try:

2037

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

2038

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

2039

except KeyError:

2524

2040

try:

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

2041

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

2042

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

2528

2043

except KeyError:

2529

continue

2530

else:

2531

uid = 65534

2532

gid = 65534

2044

try:

2045

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

2046

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

2047

except KeyError:

2048

uid = 65534

2049

gid = 65534

2533

2050

try:

2534

2051

os.setgid(gid)

2535

2052

os.setuid(uid)

2536

2053

except OSError as error:

2537

if error.errno != errno.EPERM:

2538

raise

2054

if error[0] != errno.EPERM:

2055

raise error

2056

2057

if not debug and not debuglevel:

2058

logger.setLevel(logging.WARNING)

2059

if debuglevel:

2060

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

2061

logger.setLevel(level)

2539

2062

2540

2063

if debug:

2064

logger.setLevel(logging.DEBUG)

2541

2065

# Enable all possible GnuTLS debugging

2542

2066

2543

2067

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

2548

2072

def debug_gnutls(level, string):

2549

2073

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

2550

2074

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2075

(gnutls.library.functions

2076

.gnutls_global_set_log_function(debug_gnutls))

2553

2077

2554

2078

# Redirect stdin so all checkers get /dev/null

2555

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

2079

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

2556

2080

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

2557

2081

if null > 2:

2558

2082

os.close(null)

2083

else:

2084

# No console logging

2085

logger.removeHandler(console)

2559

2086

2560

2087

# Need to fork before connecting to D-Bus

2561

if not foreground:

2088

if not debug:

2562

2089

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

2563

2090

daemon()

2564

2091

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2568

2569

2092

global main_loop

2570

2093

# From the Avahi example code

2571

DBusGMainLoop(set_as_default=True)

2094

DBusGMainLoop(set_as_default=True )

2572

2095

main_loop = gobject.MainLoop()

2573

2096

bus = dbus.SystemBus()

2574

2097

# End of Avahi example code

2575

2098

if use_dbus:

2576

2099

try:

2577

2100

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

2578

bus,

2579

do_not_queue=True)

2580

old_bus_name = dbus.service.BusName(

2581

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

2582

do_not_queue=True)

2583

except dbus.exceptions.DBusException as e:

2584

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

2101

bus, do_not_queue=True)

2102

old_bus_name = (dbus.service.BusName

2103

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

2104

do_not_queue=True))

2105

except dbus.exceptions.NameExistsException as e:

2106

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

2585

2107

use_dbus = False

2586

2108

server_settings["use_dbus"] = False

2587

2109

tcp_server.use_dbus = False

2588

if zeroconf:

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

2595

if server_settings["interface"]:

2596

service.interface = if_nametoindex(

2597

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

2110

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2111

service = AvahiServiceToSyslog(name =

2112

server_settings["servicename"],

2113

servicetype = "_mandos._tcp",

2114

protocol = protocol, bus = bus)

2115

if server_settings["interface"]:

2116

service.interface = (if_nametoindex

2117

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

2598

2118

2599

2119

global multiprocessing_manager

2600

2120

multiprocessing_manager = multiprocessing.Manager()

2601

2121

2602

2122

client_class = Client

2603

2123

if use_dbus:

2604

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

2605

2606

client_settings = Client.config_parser(client_config)

2124

client_class = functools.partial(ClientDBusTransitional,

2125

bus = bus)

2126

2127

special_settings = {

2128

# Some settings need to be accessd by special methods;

2129

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

2130

"approved_by_default":

2131

lambda section:

2132

client_config.getboolean(section, "approved_by_default"),

2133

}

2134

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

2135

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

2136

# with exceptions for any special settings as defined above

2137

client_settings = dict((clientname,

2138

dict((setting,

2139

(value if

2140

setting not in special_settings

2141

else special_settings[setting]

2142

(clientname)))

2143

for setting, value

2144

in client_config.items(clientname)))

2145

for clientname in client_config.sections())

2146

2607

2147

old_client_settings = {}

2608

clients_data = {}

2609

2610

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

2611

global wnull

2612

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

2613

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

2614

# mode

2615

if debug or not foreground:

2616

wnull.close()

2617

2618

# Get client data and settings from last running state.

2148

clients_data = []

2149

2150

# Get client data and settings from last running state.

2619

2151

if server_settings["restore"]:

2620

2152

try:

2621

2153

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2154

clients_data, old_client_settings = (

2155

pickle.load(stored_state))

2624

2156

os.remove(stored_state_path)

2625

2157

except IOError as e:

2626

if e.errno == errno.ENOENT:

2627

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

2628

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

2629

else:

2630

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

2631

exc_info=e)

2158

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

2159

.format(e))

2160

if e.errno != errno.ENOENT:

2632

2161

raise

2633

except EOFError as e:

2634

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

2635

"EOFError:",

2636

exc_info=e)

2637

2638

with PGPEngine() as pgp:

2639

for client_name, client in clients_data.items():

2640

# Skip removed clients

2641

if client_name not in client_settings:

2642

continue

2643

2644

# Decide which value to use after restoring saved state.

2645

# We have three different values: Old config file,

2646

# new config file, and saved state.

2647

# New config value takes precedence if it differs from old

2648

# config value, otherwise use saved state.

2649

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

2650

try:

2651

# For each value in new config, check if it

2652

# differs from the old config value (Except for

2653

# the "secret" attribute)

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2657

client[name] = value

2658

except KeyError:

2659

pass

2660

2661

# Clients who has passed its expire date can still be

2662

# enabled if its last checker was successful. A Client

2663

# whose checker succeeded before we stored its state is

2664

# assumed to have successfully run all checkers during

2665

# downtime.

2666

if client["enabled"]:

2667

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

2668

if not client["last_checked_ok"]:

2669

logger.warning(

2670

"disabling client {} - Client never "

2671

"performed a successful checker".format(

2672

client_name))

2673

client["enabled"] = False

2674

elif client["last_checker_status"] != 0:

2675

logger.warning(

2676

"disabling client {} - Client last"

2677

" checker failed with error code"

2678

" {}".format(

2679

client_name,

2680

client["last_checker_status"]))

2681

client["enabled"] = False

2682

else:

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2686

logger.debug("Last checker succeeded,"

2687

" keeping {} enabled".format(

2688

client_name))

2162

2163

for client in clients_data:

2164

client_name = client["name"]

2165

2166

# Decide which value to use after restoring saved state.

2167

# We have three different values: Old config file,

2168

# new config file, and saved state.

2169

# New config value takes precedence if it differs from old

2170

# config value, otherwise use saved state.

2171

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

2689

2172

try:

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2693

except PGPError:

2694

# If decryption fails, we use secret from new settings

2695

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

2696

client_name))

2697

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

2698

["secret"])

2699

2700

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

2701

for client_name in (set(old_client_settings)

2702

- set(client_settings)):

2703

del clients_data[client_name]

2704

for client_name in (set(client_settings)

2705

- set(old_client_settings)):

2706

clients_data[client_name] = client_settings[client_name]

2707

2708

# Create all client objects

2709

for client_name, client in clients_data.items():

2710

tcp_server.clients[client_name] = client_class(

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2173

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

2174

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

2175

# attribute)

2176

if (name != "secret" and

2177

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

2178

setattr(client, name, value)

2179

except KeyError:

2180

pass

2181

2182

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

2183

# if its last checker was sucessful. Clients who checkers

2184

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

2185

# checker during downtime.

2186

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

2187

if ((datetime.datetime.utcnow()

2188

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

2189

if client["last_checker_status"] != 0:

2190

client["enabled"] = False

2191

else:

2192

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

2193

+ client["timeout"])

2194

2195

client["changedstate"] = (multiprocessing_manager

2196

.Condition(multiprocessing_manager

2197

.Lock()))

2198

if use_dbus:

2199

new_client = ClientDBusTransitional.__new__(

2200

ClientDBusTransitional)

2201

tcp_server.clients[client_name] = new_client

2202

new_client.bus = bus

2203

for name, value in client.iteritems():

2204

setattr(new_client, name, value)

2205

new_client._approvals_pending = 0

2206

new_client.add_to_dbus()

2207

else:

2208

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

2209

for name, value in client.iteritems():

2210

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

2211

2212

tcp_server.clients[client_name].decrypt_secret(

2213

client_settings[client_name]["secret"])

2214

2215

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

2216

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

2217

del tcp_server.clients[clientname]

2218

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

2219

tcp_server.clients[clientname] = client_class(name

2220

= clientname,

2221

config =

2222

client_settings

2223

[clientname])

2714

2224

2715

2225

if not tcp_server.clients:

2716

2226

logger.warning("No clients defined")

2717

2718

if not foreground:

2719

if pidfile is not None:

2720

pid = os.getpid()

2721

try:

2722

with pidfile:

2723

print(pid, file=pidfile)

2724

except IOError:

2725

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

2726

pidfilename, pid)

2727

del pidfile

2227

2228

if not debug:

2229

try:

2230

with pidfile:

2231

pid = os.getpid()

2232

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

2233

del pidfile

2234

except IOError:

2235

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

2236

pidfilename, pid)

2237

except NameError:

2238

# "pidfile" was never created

2239

pass

2728

2240

del pidfilename

2241

2242

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

2729

2243

2730

2244

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

2731

2245

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

2732

2246

2733

2247

if use_dbus:

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2248

class MandosDBusService(dbus.service.Object):

2738

2249

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

2739

2740

2250

def __init__(self):

2741

2251

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

2742

2743

2252

_interface = "se.recompile.Mandos"

2744

2253

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2751

2254

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

2752

2255

def ClientAdded(self, objpath):

2753

2256

"D-Bus signal"

2766

2269

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

2767

2270

def GetAllClients(self):

2768

2271

"D-Bus method"

2769

return dbus.Array(c.dbus_object_path for c in

2272

return dbus.Array(c.dbus_object_path

2273

for c in

2770

2274

tcp_server.clients.itervalues())

2771

2275

2772

2276

@dbus.service.method(_interface,

2774

2278

def GetAllClientsWithProperties(self):

2775

2279

"D-Bus method"

2776

2280

return dbus.Dictionary(

2777

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

2778

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

2281

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

2282

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

2779

2283

signature="oa{sv}")

2780

2284

2781

2285

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

2794

2298

2795

2299

del _interface

2796

2300

2797

mandos_dbus_service = MandosDBusService()

2301

class MandosDBusServiceTransitional(MandosDBusService):

2302

__metaclass__ = AlternateDBusNamesMetaclass

2303

mandos_dbus_service = MandosDBusServiceTransitional()

2798

2304

2799

2305

def cleanup():

2800

2306

"Cleanup function; run on exit"

2801

if zeroconf:

2802

service.cleanup()

2307

service.cleanup()

2803

2308

2804

2309

multiprocessing.active_children()

2805

wnull.close()

2806

2310

if not (tcp_server.clients or client_settings):

2807

2311

return

2808

2312

2809

2313

# Store client before exiting. Secrets are encrypted with key

2810

2314

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

2811

2315

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

2812

clients = {}

2813

with PGPEngine() as pgp:

2814

for client in tcp_server.clients.itervalues():

2815

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

2816

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

2817

key)

2818

client_dict = {}

2819

2820

# A list of attributes that can not be pickled

2821

# + secret.

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2826

exclude.add(name)

2827

2828

client_dict["encrypted_secret"] = (client

2829

.encrypted_secret)

2830

for attr in client.client_structure:

2831

if attr not in exclude:

2832

client_dict[attr] = getattr(client, attr)

2833

2834

clients[client.name] = client_dict

2835

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

2836

2316

clients = []

2317

for client in tcp_server.clients.itervalues():

2318

client.encrypt_secret(

2319

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

2320

2321

client_dict = {}

2322

2323

# A list of attributes that will not be stored when

2324

# shutting down.

2325

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

2326

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

2327

exclude.add(name)

2328

2329

client_dict["encrypted_secret"] = client.encrypted_secret

2330

for attr in client.client_structure:

2331

if attr not in exclude:

2332

client_dict[attr] = getattr(client, attr)

2333

2334

clients.append(client_dict)

2335

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

2336

2837

2337

try:

2838

with tempfile.NamedTemporaryFile(

2839

mode='wb',

2840

suffix=".pickle",

2841

prefix='clients-',

2842

dir=os.path.dirname(stored_state_path),

2843

delete=False) as stored_state:

2338

with os.fdopen(os.open(stored_state_path,

2339

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

2340

stat.S_IRUSR | stat.S_IWUSR),

2341

"wb") as stored_state:

2844

2342

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

2845

tempname = stored_state.name

2846

os.rename(tempname, stored_state_path)

2847

except (IOError, OSError) as e:

2848

if not debug:

2849

try:

2850

os.remove(tempname)

2851

except NameError:

2852

pass

2853

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

2854

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

2855

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

2856

else:

2857

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

2858

exc_info=e)

2343

except IOError as e:

2344

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

2345

.format(e))

2346

if e.errno != errno.ENOENT:

2859

2347

raise

2860

2348

2861

2349

# Delete all clients, and settings from config

2862

2350

while tcp_server.clients:

2863

2351

name, client = tcp_server.clients.popitem()

2867

2355

client.disable(quiet=True)

2868

2356

if use_dbus:

2869

2357

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2358

mandos_dbus_service.ClientRemoved(client

2359

.dbus_object_path,

2360

client.name)

2872

2361

client_settings.clear()

2873

2362

2874

2363

atexit.register(cleanup)

2880

2369

# Need to initiate checking of clients

2881

2370

if client.enabled:

2882

2371

client.init_checker()

2372

2883

2373

2884

2374

tcp_server.enable()

2885

2375

tcp_server.server_activate()

2886

2376

2887

2377

# Find out what port we got

2888

if zeroconf:

2889

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

2378

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

2890

2379

if use_ipv6:

2891

2380

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

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2381

" flowinfo %d, scope_id %d"

2382

% tcp_server.socket.getsockname())

2894

2383

else: # IPv4

2895

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

2896

*tcp_server.socket.getsockname())

2384

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

2385

% tcp_server.socket.getsockname())

2897

2386

2898

2387

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

2899

2388

2900

2389

try:

2901

if zeroconf:

2902

# From the Avahi example code

2903

try:

2904

service.activate()

2905

except dbus.exceptions.DBusException as error:

2906

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

2907

cleanup()

2908

sys.exit(1)

2909

# End of Avahi example code

2390

# From the Avahi example code

2391

try:

2392

service.activate()

2393

except dbus.exceptions.DBusException as error:

2394

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

2395

cleanup()

2396

sys.exit(1)

2397

# End of Avahi example code

2910

2398

2911

2399

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

2912

2400

lambda *args, **kwargs:

2916

2404

logger.debug("Starting main loop")

2917

2405

main_loop.run()

2918

2406

except AvahiError as error:

2919

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

2407

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

2920

2408

cleanup()

2921

2409

sys.exit(1)

2922

2410

except KeyboardInterrupt: