/mandos/trunk : revision 518.1.3

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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):

239

111

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")

306

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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170

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,

376

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

243

if state in bad_states:

391

244

if bad_states[state] is not None:

392

245

if error is None:

395

248

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

473

310

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

474

311

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

475

312

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

476

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

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

313

last_checker_status: integer between 0 and 255 reflecting exit status

314

of last checker. -1 reflect crashed checker,

315

or None.

316

last_enabled: datetime.datetime(); (UTC)

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()

597

if not attr.startswith("_")]

394

self.approval_delay = string_to_delta(

395

config["approval_delay"])

396

self.approval_duration = string_to_delta(

397

config["approval_duration"])

398

self.changedstate = (multiprocessing_manager

399

.Condition(multiprocessing_manager

400

.Lock()))

401

self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]

598

402

self.client_structure.append("client_structure")

599

600

for name, t in inspect.getmembers(

601

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

403

404

405

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

406

lambda obj: isinstance(obj, property)):

602

407

if not name.startswith("_"):

603

408

self.client_structure.append(name)

604

409

612

417

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

613

418

# Already enabled

614

419

return

420

self.send_changedstate()

615

421

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

616

422

self.enabled = True

617

423

self.last_enabled = datetime.datetime.utcnow()

618

424

self.init_checker()

619

self.send_changedstate()

620

425

621

426

def disable(self, quiet=True):

622

427

"""Disable this client."""

623

428

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

624

429

return False

625

430

if not quiet:

431

self.send_changedstate()

432

if not quiet:

626

433

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

627

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

434

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

628

435

gobject.source_remove(self.disable_initiator_tag)

629

436

self.disable_initiator_tag = None

630

437

self.expires = None

631

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

438

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

632

439

gobject.source_remove(self.checker_initiator_tag)

633

440

self.checker_initiator_tag = None

634

441

self.stop_checker()

635

442

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

638

443

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

639

444

return False

640

445

641

446

def __del__(self):

642

447

self.disable()

643

448

644

449

def init_checker(self):

645

450

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

646

451

# 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)

452

self.checker_initiator_tag = (gobject.timeout_add

453

(self.interval_milliseconds(),

454

self.start_checker))

652

455

# 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)

456

self.disable_initiator_tag = (gobject.timeout_add

457

(self.timeout_milliseconds(),

458

self.disable))

657

459

# Also start a new checker *right now*.

658

460

self.start_checker()

659

660

def checker_callback(self, source, condition, connection,

661

command):

461

462

463

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

662

464

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

663

465

self.checker_callback_tag = None

664

466

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

467

if os.WIFEXITED(condition):

468

self.last_checker_status = os.WEXITSTATUS(condition)

672

469

if self.last_checker_status == 0:

673

470

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

674

471

vars(self))

675

472

self.checked_ok()

676

473

else:

677

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

474

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

475

vars(self))

678

476

else:

679

477

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

681

478

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

682

479

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."""

480

481

def checked_ok(self, timeout=None):

482

"""Bump up the timeout for this client.

483

484

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

485

alive and well.

486

"""

694

487

if timeout is None:

695

488

timeout = self.timeout

489

self.last_checked_ok = datetime.datetime.utcnow()

696

490

if self.disable_initiator_tag is not None:

697

491

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

492

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

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

493

self.disable_initiator_tag = (gobject.timeout_add

494

(_timedelta_to_milliseconds

495

(timeout), self.disable))

702

496

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

703

497

704

498

def need_approval(self):

710

504

If a checker already exists, leave it running and do

711

505

nothing."""

712

506

# 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

507

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

508

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

509

# client would inevitably timeout, since no checker would get

510

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

717

511

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

718

512

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

719

513

# should be.

720

514

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

515

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

516

try:

517

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

518

except (AttributeError, OSError) as error:

519

if (isinstance(error, OSError)

520

and error.errno != errno.ECHILD):

521

raise error

522

else:

523

if pid:

524

logger.warning("Checker was a zombie")

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status,

527

self.current_checker_command)

725

528

# Start a new checker if needed

726

529

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

530

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

531

# In case checker_command has exactly one % operator

532

command = self.checker_command % self.host

533

except TypeError:

534

# Escape attributes for the shell

535

escaped_attrs = dict(

536

(attr,

537

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

538

errors=

539

'replace')))

540

for attr in

541

self.runtime_expansions)

542

543

try:

544

command = self.checker_command % escaped_attrs

545

except TypeError as error:

546

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

547

' %s', self.checker_command, error)

548

return True # Try again later

738

549

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)

550

try:

551

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

552

command, self.name)

553

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

554

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

555

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

556

# always replaced by /dev/null.)

557

self.checker = subprocess.Popen(command,

558

close_fds=True,

559

shell=True, cwd="/")

560

self.checker_callback_tag = (gobject.child_watch_add

561

(self.checker.pid,

562

self.checker_callback,

563

data=command))

564

# The checker may have completed before the gobject

565

# watch was added. Check for this.

566

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

567

if pid:

568

gobject.source_remove(self.checker_callback_tag)

569

self.checker_callback(pid, status, command)

570

except OSError as error:

571

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

572

error)

764

573

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

765

574

return True

766

575

772

581

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

773

582

return

774

583

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

775

self.checker.terminate()

584

try:

585

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

586

#time.sleep(0.5)

587

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

588

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

589

except OSError as error:

590

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

591

raise

776

592

self.checker = None

777

593

778

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

594

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

595

def encrypt_secret(self, key):

596

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

597

hasheng = hashlib.sha256()

598

hasheng.update(key)

599

encryptionkey = hasheng.digest()

600

601

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

602

hasheng = hashlib.sha256()

603

hasheng.update(self.secret)

604

validationhash = hasheng.digest()

605

606

# Encrypt secret

607

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

608

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

609

Crypto.Cipher.AES.MODE_CFB, iv)

610

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

611

self.encrypted_secret = (ciphertext, iv)

612

613

# Decrypt a encrypted client secret

614

def decrypt_secret(self, key):

615

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

616

hasheng = hashlib.sha256()

617

hasheng.update(key)

618

encryptionkey = hasheng.digest()

619

620

# Decrypt encrypted secret

621

ciphertext, iv = self.encrypted_secret

622

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

623

Crypto.Cipher.AES.MODE_CFB, iv)

624

plain = ciphereng.decrypt(ciphertext)

625

626

# Validate decrypted secret to know if it was succesful

627

hasheng = hashlib.sha256()

628

validationhash = plain[:hasheng.digest_size]

629

secret = plain[hasheng.digest_size:]

630

hasheng.update(secret)

631

632

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

633

# the decrypted secret

634

if hasheng.digest() == validationhash:

635

self.secret = secret

636

else:

637

self.secret = key

638

del self.encrypted_secret

639

640

641

def dbus_service_property(dbus_interface, signature="v",

642

access="readwrite", byte_arrays=False):

783

643

"""Decorators for marking methods of a DBusObjectWithProperties to

784

644

become properties on the D-Bus.

785

645

794

654

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

795

655

if byte_arrays and signature != "ay":

796

656

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

797

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

798

657

" signature %r" % signature)

799

658

def decorator(func):

800

659

func._dbus_is_property = True

801

660

func._dbus_interface = dbus_interface

806

665

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

807

666

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

808

667

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

668

return decorator

852

669

853

670

854

671

class DBusPropertyException(dbus.exceptions.DBusException):

855

672

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

856

673

"""

857

pass

674

def __unicode__(self):

675

return unicode(str(self))

858

676

859

677

860

678

class DBusPropertyAccessException(DBusPropertyException):

878

696

"""

879

697

880

698

@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)

699

def _is_dbus_property(obj):

700

return getattr(obj, "_dbus_is_property", False)

889

701

890

def _get_all_dbus_things(self, thing):

702

def _get_all_dbus_properties(self):

891

703

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

892

704

"""

893

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

894

athing.__get__(self))

705

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

895

706

for cls in self.__class__.__mro__

896

for name, athing in

897

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

707

for name, prop in

708

inspect.getmembers(cls, self._is_dbus_property))

898

709

899

710

def _get_dbus_property(self, interface_name, property_name):

900

711

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

901

712

property with the specified name and interface.

902

713

"""

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

714

for cls in self.__class__.__mro__:

715

for name, value in (inspect.getmembers

716

(cls, self._is_dbus_property)):

906

717

if (value._dbus_name == property_name

907

718

and value._dbus_interface == interface_name):

908

719

return value.__get__(self)

909

720

910

721

# No such property

911

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

912

self.dbus_object_path, interface_name, property_name))

722

raise DBusPropertyNotFound(self.dbus_object_path + ":"

723

+ interface_name + "."

724

+ property_name)

913

725

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

726

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

916

727

out_signature="v")

917

728

def Get(self, interface_name, property_name):

918

729

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

936

747

# The byte_arrays option is not supported yet on

937

748

# signatures other than "ay".

938

749

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))

750

raise ValueError

751

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

752

for byte in value))

944

753

prop(value)

945

754

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

755

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

948

756

out_signature="a{sv}")

949

757

def GetAll(self, interface_name):

950

758

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

952

760

953

761

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

954

762

"""

955

properties = {}

956

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

763

all = {}

764

for name, prop in self._get_all_dbus_properties():

957

765

if (interface_name

958

766

and interface_name != prop._dbus_interface):

959

767

# Interface non-empty but did not match

963

771

continue

964

772

value = prop()

965

773

if not hasattr(value, "variant_level"):

966

properties[name] = value

774

all[name] = value

967

775

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

776

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

777

value.variant_level+1)

778

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

979

779

980

780

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

781

out_signature="s",

982

782

path_keyword='object_path',

983

783

connection_keyword='connection')

984

784

def Introspect(self, object_path, connection):

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

785

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

988

786

"""

989

787

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

990

788

connection)

991

789

try:

992

790

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

993

994

791

def make_tag(document, name, prop):

995

792

e = document.createElement("property")

996

793

e.setAttribute("name", name)

997

794

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

998

795

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

999

796

return e

1000

1001

797

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

1002

# Add property tags

1003

798

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

1004

799

for name, prop

1005

in self._get_all_dbus_things("property")

800

in self._get_all_dbus_properties()

1006

801

if prop._dbus_interface

1007

802

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

1008

803

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

804

# Add the names to the return values for the

1039

805

# "org.freedesktop.DBus.Properties" methods

1040

806

if (if_tag.getAttribute("name")

1055

821

except (AttributeError, xml.dom.DOMException,

1056

822

xml.parsers.expat.ExpatError) as error:

1057

823

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

1058

exc_info=error)

824

error)

1059

825

return xmlstring

1060

826

1061

827

1062

def datetime_to_dbus(dt, variant_level=0):

828

def datetime_to_dbus (dt, variant_level=0):

1063

829

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

1064

830

if dt is None:

1065

831

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).

832

return dbus.String(dt.isoformat(),

833

variant_level=variant_level)

834

835

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

836

.__metaclass__):

837

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

838

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

1091

839

"""

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):

840

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

841

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

842

# methods, signals, or properties in them

843

for base in (b for b in bases

844

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

845

# Go though all attributes of the base class

846

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

1100

847

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

1101

848

# with the wrong interface name

1102

849

if (not hasattr(attribute, "_dbus_interface")

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

850

or not attribute._dbus_interface

851

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

1105

852

continue

1106

853

# Create an alternate D-Bus interface name based on

1107

854

# the current name

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

855

alt_interface = (attribute._dbus_interface

856

.replace("se.recompile.Mandos",

857

"se.bsnet.fukt.Mandos"))

1111

858

# Is this a D-Bus signal?

1112

859

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(

860

# Extract the original non-method function by

861

# black magic

862

nonmethod_func = (dict(

1117

863

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

864

attribute.__closure__))["func"]

865

.cell_contents)

1122

866

# Create a new, but exactly alike, function

1123

867

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

1124

868

# 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

869

new_function = (dbus.service.signal

870

(alt_interface,

871

attribute._dbus_signature)

872

(types.FunctionType(

873

nonmethod_func.func_code,

874

nonmethod_func.func_globals,

875

nonmethod_func.func_name,

876

nonmethod_func.func_defaults,

877

nonmethod_func.func_closure)))

1148

878

# 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

879

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

880

# signals gets sent when the function is called

1152

881

def fixscope(func1, func2):

1153

882

"""This function is a scope container to pass

1154

883

func1 and func2 to the "call_both" function

1155

884

outside of its arguments"""

1156

1157

885

def call_both(*args, **kwargs):

1158

886

"""This function will emit two D-Bus

1159

887

signals by calling func1 and func2"""

1160

888

func1(*args, **kwargs)

1161

889

func2(*args, **kwargs)

1162

1163

890

return call_both

1164

891

# Create the "call_both" function and add it to

1165

892

# the class

1166

attr[attrname] = fixscope(attribute, new_function)

893

attr[attrname] = fixscope(attribute,

894

new_function)

1167

895

# Is this a D-Bus method?

1168

896

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

1169

897

# Create a new, but exactly alike, function

1170

898

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

1171

899

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

1172

900

# 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

901

attr[attrname] = (dbus.service.method

902

(alt_interface,

903

attribute._dbus_in_signature,

904

attribute._dbus_out_signature)

905

(types.FunctionType

906

(attribute.func_code,

907

attribute.func_globals,

908

attribute.func_name,

909

attribute.func_defaults,

910

attribute.func_closure)))

1189

911

# Is this a D-Bus property?

1190

912

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

1191

913

# Create a new, but exactly alike, function

1192

914

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

1193

915

# property with the alternate D-Bus interface

1194

916

# 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"})

917

attr[attrname] = (dbus_service_property

918

(alt_interface,

919

attribute._dbus_signature,

920

attribute._dbus_access,

921

attribute

922

._dbus_get_args_options

923

["byte_arrays"])

924

(types.FunctionType

925

(attribute.func_code,

926

attribute.func_globals,

927

attribute.func_name,

928

attribute.func_defaults,

929

attribute.func_closure)))

930

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

931

1252

932

class ClientDBus(Client, DBusObjectWithProperties):

1253

933

"""A Client class using D-Bus

1254

934

1258

938

"""

1259

939

1260

940

runtime_expansions = (Client.runtime_expansions

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

941

+ ("dbus_object_path",))

1264

942

1265

943

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

1266

944

1267

945

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

1268

946

self.bus = bus

1269

947

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

948

949

self._approvals_pending = 0

1270

950

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

1271

951

# the D-Bus

1272

client_object_name = str(self.name).translate(

952

client_object_name = unicode(self.name).translate(

1273

953

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

1274

954

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

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

955

self.dbus_object_path = (dbus.ObjectPath

956

("/clients/" + client_object_name))

1277

957

DBusObjectWithProperties.__init__(self, self.bus,

1278

958

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):

959

960

def notifychangeproperty(transform_func,

961

dbus_name, type_func=lambda x: x,

962

variant_level=1):

1285

963

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

1286

964

its changes to DBus.

1287

965

1288

966

transform_fun: Function that takes a value and a variant_level

1289

967

and transforms it to a D-Bus type.

1290

968

dbus_name: D-Bus name of the variable

1292

970

to the D-Bus. Default: no transform

1293

971

variant_level: D-Bus variant level. Default: 1

1294

972

"""

1295

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

1296

973

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

1297

974

def setter(self, value):

1298

975

if hasattr(self, "dbus_object_path"):

1299

976

if (not hasattr(self, attrname) or

1300

977

type_func(getattr(self, attrname, None))

1301

978

!= 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())

979

dbus_value = transform_func(type_func(value),

980

variant_level

981

=variant_level)

982

self.PropertyChanged(dbus.String(dbus_name),

983

dbus_value)

1317

984

setattr(self, attrname, value)

1318

985

1319

986

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

1320

987

988

1321

989

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

990

approvals_pending = notifychangeproperty(dbus.Boolean,

1323

991

"ApprovalPending",

1325

993

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

1326

994

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

995

"LastEnabled")

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

996

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

997

type_func = lambda checker:

998

checker is not None)

1331

999

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

1000

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1335

1001

last_approval_request = notifychangeproperty(

1336

1002

datetime_to_dbus, "LastApprovalRequest")

1337

1003

approved_by_default = notifychangeproperty(dbus.Boolean,

1338

1004

"ApprovedByDefault")

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

1005

approval_delay = notifychangeproperty(dbus.UInt16,

1006

"ApprovalDelay",

1007

type_func =

1008

_timedelta_to_milliseconds)

1342

1009

approval_duration = notifychangeproperty(

1343

dbus.UInt64, "ApprovalDuration",

1344

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

1010

dbus.UInt16, "ApprovalDuration",

1011

type_func = _timedelta_to_milliseconds)

1345

1012

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

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

1013

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

1014

type_func =

1015

_timedelta_to_milliseconds)

1349

1016

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)

1017

dbus.UInt16, "ExtendedTimeout",

1018

type_func = _timedelta_to_milliseconds)

1019

interval = notifychangeproperty(dbus.UInt16,

1020

"Interval",

1021

type_func =

1022

_timedelta_to_milliseconds)

1355

1023

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

1356

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

1357

invalidate_only=True)

1358

1024

1359

1025

del notifychangeproperty

1360

1026

1367

1033

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

1368

1034

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

1369

1035

1370

def checker_callback(self, source, condition,

1371

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

1372

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

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

1036

def checker_callback(self, pid, condition, command,

1037

*args, **kwargs):

1038

self.checker_callback_tag = None

1039

self.checker = None

1040

if os.WIFEXITED(condition):

1041

exitstatus = os.WEXITSTATUS(condition)

1377

1042

# Emit D-Bus signal

1378

1043

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

1044

dbus.Int64(condition),

1380

1045

dbus.String(command))

1381

1046

else:

1382

1047

# Emit D-Bus signal

1383

1048

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

1384

dbus.Int64(

1385

self.last_checker_signal),

1049

dbus.Int64(condition),

1386

1050

dbus.String(command))

1387

return ret

1051

1052

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

1053

*args, **kwargs)

1388

1054

1389

1055

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

1390

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

1056

old_checker = self.checker

1057

if self.checker is not None:

1058

old_checker_pid = self.checker.pid

1059

else:

1060

old_checker_pid = None

1391

1061

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

1392

1062

# Only if new checker process was started

1393

1063

if (self.checker is not None

1397

1067

return r

1398

1068

1399

1069

def _reset_approved(self):

1400

self.approved = None

1070

self._approved = None

1401

1071

return False

1402

1072

1403

1073

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

1074

self.send_changedstate()

1075

self._approved = value

1076

gobject.timeout_add(_timedelta_to_milliseconds

1077

(self.approval_duration),

1078

self._reset_approved)

1079

1408

1080

1409

1081

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1082

_interface = "se.recompile.Mandos.Client"

1412

1083

1413

1084

## Signals

1414

1085

1425

1096

pass

1426

1097

1427

1098

# PropertyChanged - signal

1428

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

1429

1099

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

1430

1100

def PropertyChanged(self, property, value):

1431

1101

"D-Bus signal"

1452

1122

"D-Bus signal"

1453

1123

return self.need_approval()

1454

1124

1125

# NeRwequest - signal

1126

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

1127

def NewRequest(self, ip):

1128

"""D-Bus signal

1129

Is sent after a client request a password.

1130

"""

1131

pass

1132

1455

1133

## Methods

1456

1134

1457

1135

# Approve - method

1495

1173

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

1496

1174

1497

1175

# ApprovedByDefault - property

1498

@dbus_service_property(_interface,

1499

signature="b",

1176

@dbus_service_property(_interface, signature="b",

1500

1177

access="readwrite")

1501

1178

def ApprovedByDefault_dbus_property(self, value=None):

1502

1179

if value is None: # get

1504

1181

self.approved_by_default = bool(value)

1505

1182

1506

1183

# ApprovalDelay - property

1507

@dbus_service_property(_interface,

1508

signature="t",

1184

@dbus_service_property(_interface, signature="t",

1509

1185

access="readwrite")

1510

1186

def ApprovalDelay_dbus_property(self, value=None):

1511

1187

if value is None: # get

1512

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

1513

* 1000)

1188

return dbus.UInt64(self.approval_delay_milliseconds())

1514

1189

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

1515

1190

1516

1191

# ApprovalDuration - property

1517

@dbus_service_property(_interface,

1518

signature="t",

1192

@dbus_service_property(_interface, signature="t",

1519

1193

access="readwrite")

1520

1194

def ApprovalDuration_dbus_property(self, value=None):

1521

1195

if value is None: # get

1522

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

1523

* 1000)

1196

return dbus.UInt64(_timedelta_to_milliseconds(

1197

self.approval_duration))

1524

1198

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

1525

1199

1526

1200

# Name - property

1534

1208

return dbus.String(self.fingerprint)

1535

1209

1536

1210

# Host - property

1537

@dbus_service_property(_interface,

1538

signature="s",

1211

@dbus_service_property(_interface, signature="s",

1539

1212

access="readwrite")

1540

1213

def Host_dbus_property(self, value=None):

1541

1214

if value is None: # get

1542

1215

return dbus.String(self.host)

1543

self.host = str(value)

1216

self.host = value

1544

1217

1545

1218

# Created - property

1546

1219

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

1547

1220

def Created_dbus_property(self):

1548

return datetime_to_dbus(self.created)

1221

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

1549

1222

1550

1223

# LastEnabled - property

1551

1224

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

1553

1226

return datetime_to_dbus(self.last_enabled)

1554

1227

1555

1228

# Enabled - property

1556

@dbus_service_property(_interface,

1557

signature="b",

1229

@dbus_service_property(_interface, signature="b",

1558

1230

access="readwrite")

1559

1231

def Enabled_dbus_property(self, value=None):

1560

1232

if value is None: # get

1565

1237

self.disable()

1566

1238

1567

1239

# LastCheckedOK - property

1568

@dbus_service_property(_interface,

1569

signature="s",

1240

@dbus_service_property(_interface, signature="s",

1570

1241

access="readwrite")

1571

1242

def LastCheckedOK_dbus_property(self, value=None):

1572

1243

if value is not None:

1574

1245

return

1575

1246

return datetime_to_dbus(self.last_checked_ok)

1576

1247

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

1248

# Expires - property

1583

1249

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

1584

1250

def Expires_dbus_property(self):

1590

1256

return datetime_to_dbus(self.last_approval_request)

1591

1257

1592

1258

# Timeout - property

1593

@dbus_service_property(_interface,

1594

signature="t",

1259

@dbus_service_property(_interface, signature="t",

1595

1260

access="readwrite")

1596

1261

def Timeout_dbus_property(self, value=None):

1597

1262

if value is None: # get

1598

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

1599

old_timeout = self.timeout

1263

return dbus.UInt64(self.timeout_milliseconds())

1600

1264

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)

1265

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

1266

return

1267

# Reschedule timeout

1268

gobject.source_remove(self.disable_initiator_tag)

1269

self.disable_initiator_tag = None

1270

self.expires = None

1271

time_to_die = _timedelta_to_milliseconds((self

1272

.last_checked_ok

1273

+ self.timeout)

1274

- datetime.datetime

1275

.utcnow())

1276

if time_to_die <= 0:

1277

# The timeout has passed

1278

self.disable()

1279

else:

1280

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

1281

+ datetime.timedelta(milliseconds =

1282

time_to_die))

1283

self.disable_initiator_tag = (gobject.timeout_add

1284

(time_to_die, self.disable))

1616

1285

1617

1286

# ExtendedTimeout - property

1618

@dbus_service_property(_interface,

1619

signature="t",

1287

@dbus_service_property(_interface, signature="t",

1620

1288

access="readwrite")

1621

1289

def ExtendedTimeout_dbus_property(self, value=None):

1622

1290

if value is None: # get

1623

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

1624

* 1000)

1291

return dbus.UInt64(self.extended_timeout_milliseconds())

1625

1292

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

1626

1293

1627

1294

# Interval - property

1628

@dbus_service_property(_interface,

1629

signature="t",

1295

@dbus_service_property(_interface, signature="t",

1630

1296

access="readwrite")

1631

1297

def Interval_dbus_property(self, value=None):

1632

1298

if value is None: # get

1633

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

1299

return dbus.UInt64(self.interval_milliseconds())

1634

1300

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

1635

1301

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

1636

1302

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

1303

# Reschedule checker run

1304

gobject.source_remove(self.checker_initiator_tag)

1305

self.checker_initiator_tag = (gobject.timeout_add

1306

(value, self.start_checker))

1307

self.start_checker() # Start one now, too

1643

1308

1644

1309

# Checker - property

1645

@dbus_service_property(_interface,

1646

signature="s",

1310

@dbus_service_property(_interface, signature="s",

1647

1311

access="readwrite")

1648

1312

def Checker_dbus_property(self, value=None):

1649

1313

if value is None: # get

1650

1314

return dbus.String(self.checker_command)

1651

self.checker_command = str(value)

1315

self.checker_command = value

1652

1316

1653

1317

# CheckerRunning - property

1654

@dbus_service_property(_interface,

1655

signature="b",

1318

@dbus_service_property(_interface, signature="b",

1656

1319

access="readwrite")

1657

1320

def CheckerRunning_dbus_property(self, value=None):

1658

1321

if value is None: # get

1668

1331

return self.dbus_object_path # is already a dbus.ObjectPath

1669

1332

1670

1333

# Secret = property

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1334

@dbus_service_property(_interface, signature="ay",

1335

access="write", byte_arrays=True)

1675

1336

def Secret_dbus_property(self, value):

1676

self.secret = bytes(value)

1337

self.secret = str(value)

1677

1338

1678

1339

del _interface

1679

1340

1683

1344

self._pipe = child_pipe

1684

1345

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

1685

1346

if not self._pipe.recv():

1686

raise KeyError(fpr)

1347

raise KeyError()

1687

1348

1688

1349

def __getattribute__(self, name):

1689

if name == '_pipe':

1350

if(name == '_pipe'):

1690

1351

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

1691

1352

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

1692

1353

data = self._pipe.recv()

1693

1354

if data[0] == 'data':

1694

1355

return data[1]

1695

1356

if data[0] == 'function':

1696

1697

1357

def func(*args, **kwargs):

1698

1358

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

1699

1359

return self._pipe.recv()[1]

1700

1701

1360

return func

1702

1361

1703

1362

def __setattr__(self, name, value):

1704

if name == '_pipe':

1363

if(name == '_pipe'):

1705

1364

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

1706

1365

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

1707

1366

1367

class ClientDBusTransitional(ClientDBus):

1368

__metaclass__ = AlternateDBusNamesMetaclass

1708

1369

1709

1370

class ClientHandler(socketserver.BaseRequestHandler, object):

1710

1371

"""A class to handle client connections.

1715

1376

def handle(self):

1716

1377

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

1717

1378

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

1718

str(self.client_address))

1379

unicode(self.client_address))

1719

1380

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

1720

1381

self.server.child_pipe.fileno())

1721

1382

1722

session = gnutls.connection.ClientSession(

1723

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

1383

session = (gnutls.connection

1384

.ClientSession(self.request,

1385

gnutls.connection

1386

.X509Credentials()))

1724

1387

1725

1388

# Note: gnutls.connection.X509Credentials is really a

1726

1389

# generic GnuTLS certificate credentials object so long as

1735

1398

priority = self.server.gnutls_priority

1736

1399

if priority is None:

1737

1400

priority = "NORMAL"

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1401

(gnutls.library.functions

1402

.gnutls_priority_set_direct(session._c_object,

1403

priority, None))

1740

1404

1741

1405

# Start communication using the Mandos protocol

1742

1406

# Get protocol number

1744

1408

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

1745

1409

try:

1746

1410

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

1747

raise RuntimeError(line)

1411

raise RuntimeError

1748

1412

except (ValueError, IndexError, RuntimeError) as error:

1749

1413

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

1750

1414

return

1762

1426

approval_required = False

1763

1427

try:

1764

1428

try:

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1429

fpr = self.fingerprint(self.peer_certificate

1430

(session))

1767

1431

except (TypeError,

1768

1432

gnutls.errors.GNUTLSError) as error:

1769

1433

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

1770

1434

return

1771

1435

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

1436

if self.server.use_dbus:

1437

# Emit D-Bus signal

1438

client.NewRequest(str(self.client_address))

1772

1439

1773

1440

try:

1774

1441

client = ProxyClient(child_pipe, fpr,

1784

1451

while True:

1785

1452

if not client.enabled:

1786

1453

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

1787

client.name)

1454

client.name)

1788

1455

if self.server.use_dbus:

1789

1456

# Emit D-Bus signal

1790

1457

client.Rejected("Disabled")

1791

1458

return

1792

1459

1793

if client.approved or not client.approval_delay:

1460

if client._approved or not client.approval_delay:

1794

1461

#We are approved or approval is disabled

1795

1462

break

1796

elif client.approved is None:

1463

elif client._approved is None:

1797

1464

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

1798

1465

client.name)

1799

1466

if self.server.use_dbus:

1800

1467

# Emit D-Bus signal

1801

1468

client.NeedApproval(

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1469

client.approval_delay_milliseconds(),

1470

client.approved_by_default)

1804

1471

else:

1805

1472

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

1806

1473

client.name)

1812

1479

#wait until timeout or approved

1813

1480

time = datetime.datetime.now()

1814

1481

client.changedstate.acquire()

1815

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

1482

(client.changedstate.wait

1483

(float(client._timedelta_to_milliseconds(delay)

1484

/ 1000)))

1816

1485

client.changedstate.release()

1817

1486

time2 = datetime.datetime.now()

1818

1487

if (time2 - time) >= delay:

1834

1503

try:

1835

1504

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

1836

1505

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1506

logger.warning("gnutls send failed")

1839

1507

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1508

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

1509

sent, len(client.secret)

1510

- (sent_size + sent))

1843

1511

sent_size += sent

1844

1512

1845

1513

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

1846

1514

# bump the timeout using extended_timeout

1847

client.bump_timeout(client.extended_timeout)

1515

client.checked_ok(client.extended_timeout)

1848

1516

if self.server.use_dbus:

1849

1517

# Emit D-Bus signal

1850

1518

client.GotSecret()

1855

1523

try:

1856

1524

session.bye()

1857

1525

except gnutls.errors.GNUTLSError as error:

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1526

logger.warning("GnuTLS bye failed")

1860

1527

1861

1528

@staticmethod

1862

1529

def peer_certificate(session):

1863

1530

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

1864

1531

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1532

if (gnutls.library.functions

1533

.gnutls_certificate_type_get(session._c_object)

1867

1534

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

1535

# ...do the normal thing

1869

1536

return session.peer_certificate

1883

1550

def fingerprint(openpgp):

1884

1551

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1885

1552

# 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)))

1553

datum = (gnutls.library.types

1554

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

1555

ctypes.POINTER

1556

(ctypes.c_ubyte)),

1557

ctypes.c_uint(len(openpgp))))

1890

1558

# New empty GnuTLS certificate

1891

1559

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1560

(gnutls.library.functions

1561

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1894

1562

# 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)

1563

(gnutls.library.functions

1564

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

1565

gnutls.library.constants

1566

.GNUTLS_OPENPGP_FMT_RAW))

1898

1567

# Verify the self signature in the key

1899

1568

crtverify = ctypes.c_uint()

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1569

(gnutls.library.functions

1570

.gnutls_openpgp_crt_verify_self(crt, 0,

1571

ctypes.byref(crtverify)))

1902

1572

if crtverify.value != 0:

1903

1573

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1574

raise (gnutls.errors.CertificateSecurityError

1575

("Verify failed"))

1906

1576

# New buffer for the fingerprint

1907

1577

buf = ctypes.create_string_buffer(20)

1908

1578

buf_len = ctypes.c_size_t()

1909

1579

# 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))

1580

(gnutls.library.functions

1581

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

1582

ctypes.byref(buf_len)))

1912

1583

# Deinit the certificate

1913

1584

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1914

1585

# Convert the buffer to a Python bytestring

1915

1586

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

1916

1587

# Convert the bytestring to hexadecimal notation

1917

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

1588

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

1918

1589

return hex_fpr

1919

1590

1920

1591

1921

1592

class MultiprocessingMixIn(object):

1922

1593

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

1923

1924

1594

def sub_process_main(self, request, address):

1925

1595

try:

1926

1596

self.finish_request(request, address)

1927

except Exception:

1597

except:

1928

1598

self.handle_error(request, address)

1929

1599

self.close_request(request)

1930

1600

1931

1601

def process_request(self, request, address):

1932

1602

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

1933

1603

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

1934

args = (request, address))

1604

args = (request,

1605

address))

1935

1606

proc.start()

1936

1607

return proc

1937

1608

1938

1609

1939

1610

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1940

1611

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

1941

1942

1612

def process_request(self, request, client_address):

1943

1613

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

1944

1614

1953

1623

1954

1624

def add_pipe(self, parent_pipe, proc):

1955

1625

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

1956

raise NotImplementedError()

1626

raise NotImplementedError

1957

1627

1958

1628

1959

1629

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1965

1635

interface: None or a network interface name (string)

1966

1636

use_ipv6: Boolean; to use IPv6 or not

1967

1637

"""

1968

1969

1638

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

"""

1639

interface=None, use_ipv6=True):

1976

1640

self.interface = interface

1977

1641

if use_ipv6:

1978

1642

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

1643

socketserver.TCPServer.__init__(self, server_address,

2006

1644

RequestHandlerClass)

2007

2008

1645

def server_bind(self):

2009

1646

"""This overrides the normal server_bind() function

2010

1647

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

2016

1653

self.interface)

2017

1654

else:

2018

1655

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1656

self.socket.setsockopt(socket.SOL_SOCKET,

1657

SO_BINDTODEVICE,

1658

str(self.interface

1659

+ '\0'))

2022

1660

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:

1661

if error[0] == errno.EPERM:

1662

logger.error("No permission to"

1663

" bind to interface %s",

1664

self.interface)

1665

elif error[0] == errno.ENOPROTOOPT:

2027

1666

logger.error("SO_BINDTODEVICE not available;"

2028

1667

" cannot bind to interface %s",

2029

1668

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

1669

else:

2034

1670

raise

2035

1671

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

2038

1674

if self.address_family == socket.AF_INET6:

2039

1675

any_address = "::" # in6addr_any

2040

1676

else:

2041

any_address = "0.0.0.0" # INADDR_ANY

1677

any_address = socket.INADDR_ANY

2042

1678

self.server_address = (any_address,

2043

1679

self.server_address[1])

2044

1680

elif not self.server_address[1]:

2045

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

1681

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

1682

0)

2046

1683

# if self.interface:

2047

1684

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

2048

1685

# 0, # port

2062

1699

2063

1700

Assumes a gobject.MainLoop event loop.

2064

1701

"""

2065

2066

1702

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):

1703

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

1704

gnutls_priority=None, use_dbus=True):

2073

1705

self.enabled = False

2074

1706

self.clients = clients

2075

1707

if self.clients is None:

2079

1711

IPv6_TCPServer.__init__(self, server_address,

2080

1712

RequestHandlerClass,

2081

1713

interface = interface,

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1714

use_ipv6 = use_ipv6)

2085

1715

def server_activate(self):

2086

1716

if self.enabled:

2087

1717

return socketserver.TCPServer.server_activate(self)

2091

1721

2092

1722

def add_pipe(self, parent_pipe, proc):

2093

1723

# 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))

1724

gobject.io_add_watch(parent_pipe.fileno(),

1725

gobject.IO_IN | gobject.IO_HUP,

1726

functools.partial(self.handle_ipc,

1727

parent_pipe =

1728

parent_pipe,

1729

proc = proc))

2100

1730

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

client_object=None):

1731

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

1732

proc = None, client_object=None):

1733

condition_names = {

1734

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

1735

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

1736

# blocking).

1737

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

1738

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

1739

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

1740

# broken, usually for pipes and

1741

# sockets).

1742

}

1743

conditions_string = ' | '.join(name

1744

for cond, name in

1745

condition_names.iteritems()

1746

if cond & condition)

2105

1747

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

2106

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

1748

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

2107

1749

# Wait for other process to exit

2108

1750

proc.join()

2109

1751

return False

2130

1772

parent_pipe.send(False)

2131

1773

return False

2132

1774

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))

1775

gobject.io_add_watch(parent_pipe.fileno(),

1776

gobject.IO_IN | gobject.IO_HUP,

1777

functools.partial(self.handle_ipc,

1778

parent_pipe =

1779

parent_pipe,

1780

proc = proc,

1781

client_object =

1782

client))

2140

1783

parent_pipe.send(True)

2141

1784

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

2142

1785

# same fileno

2148

1791

2149

1792

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

2150

1793

funcname)(*args,

2151

**kwargs)))

1794

**kwargs)))

2152

1795

2153

1796

if command == 'getattr':

2154

1797

attrname = request[1]

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1798

if callable(client_object.__getattribute__(attrname)):

1799

parent_pipe.send(('function',))

2158

1800

else:

2159

parent_pipe.send((

2160

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

1801

parent_pipe.send(('data', client_object

1802

.__getattribute__(attrname)))

2161

1803

2162

1804

if command == 'setattr':

2163

1805

attrname = request[1]

2167

1809

return True

2168

1810

2169

1811

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

1812

def string_to_delta(interval):

2267

1813

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

2268

1814

2279

1825

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

2280

1826

datetime.timedelta(0, 330)

2281

1827

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

2288

1828

timevalue = datetime.timedelta(0)

2289

1829

for s in interval.split():

2290

1830

try:

2291

suffix = s[-1]

1831

suffix = unicode(s[-1])

2292

1832

value = int(s[:-1])

2293

1833

if suffix == "d":

2294

1834

delta = datetime.timedelta(value)

2301

1841

elif suffix == "w":

2302

1842

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

2303

1843

else:

2304

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

2305

except IndexError as e:

1844

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

1845

except (ValueError, IndexError) as e:

2306

1846

raise ValueError(*(e.args))

2307

1847

timevalue += delta

2308

1848

return timevalue

2309

1849

2310

1850

1851

def if_nametoindex(interface):

1852

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

1853

1854

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

1855

global if_nametoindex

1856

try:

1857

if_nametoindex = (ctypes.cdll.LoadLibrary

1858

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

1859

.if_nametoindex)

1860

except (OSError, AttributeError):

1861

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

1862

def if_nametoindex(interface):

1863

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

1864

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

1865

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

1866

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1867

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

1868

interface))

1869

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

1870

ifreq[16:20])[0]

1871

return interface_index

1872

return if_nametoindex(interface)

1873

1874

2311

1875

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

2312

1876

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

2313

1877

2321

1885

sys.exit()

2322

1886

if not noclose:

2323

1887

# Close all standard open file descriptors

2324

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

1888

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

2325

1889

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

2326

1890

raise OSError(errno.ENODEV,

2327

"{} not a character device"

2328

.format(os.devnull))

1891

"%s not a character device"

1892

% os.path.devnull)

2329

1893

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

2330

1894

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

2331

1895

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

2340

1904

2341

1905

parser = argparse.ArgumentParser()

2342

1906

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

2343

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

1907

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

2344

1908

help="show version number and exit")

2345

1909

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

2346

1910

help="Bind to interface IF")

2352

1916

help="Run self-test")

2353

1917

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

2354

1918

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

2355

" to terminal", default=None)

1919

" to terminal")

2356

1920

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

2357

1921

help="Debug level for stdout output")

2358

1922

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

2365

1929

" files")

2366

1930

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

2367

1931

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

2368

" system bus interface", default=None)

1932

" system bus interface")

2369

1933

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

2370

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

2371

default=None)

1934

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

2372

1935

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

1936

dest="restore", 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 setting not in special_settings

2140

else special_settings[setting](clientname)))

2141

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

2142

for clientname in client_config.sections())

2143

2607

2144

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.

2145

clients_data = []

2146

2147

# Get client data and settings from last running state.

2619

2148

if server_settings["restore"]:

2620

2149

try:

2621

2150

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2151

clients_data, old_client_settings = pickle.load(stored_state)

2624

2152

os.remove(stored_state_path)

2625

2153

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)

2154

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

2155

if e.errno != errno.ENOENT:

2632

2156

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))

2157

2158

for client in clients_data:

2159

client_name = client["name"]

2160

2161

# Decide which value to use after restoring saved state.

2162

# We have three different values: Old config file,

2163

# new config file, and saved state.

2164

# New config value takes precedence if it differs from old

2165

# config value, otherwise use saved state.

2166

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

2689

2167

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)

2714

2168

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

2169

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

2170

# attribute)

2171

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

2172

setattr(client, name, value)

2173

except KeyError:

2174

pass

2175

2176

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

2177

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

2178

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

2179

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

2180

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

2181

> client["interval"]):

2182

if client["last_checker_status"] != 0:

2183

client["enabled"] = False

2184

else:

2185

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

2186

2187

client["changedstate"] = (multiprocessing_manager

2188

.Condition(multiprocessing_manager

2189

.Lock()))

2190

if use_dbus:

2191

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2192

tcp_server.clients[client_name] = new_client

2193

new_client.bus = bus

2194

for name, value in client.iteritems():

2195

setattr(new_client, name, value)

2196

client_object_name = unicode(client_name).translate(

2197

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

2198

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

2199

new_client.dbus_object_path = (dbus.ObjectPath

2200

("/clients/" + client_object_name))

2201

DBusObjectWithProperties.__init__(new_client,

2202

new_client.bus,

2203

new_client.dbus_object_path)

2204

else:

2205

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

2206

for name, value in client.iteritems():

2207

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

2208

2209

tcp_server.clients[client_name].decrypt_secret(

2210

client_settings[client_name]["secret"])

2211

2212

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

2213

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

2214

del tcp_server.clients[clientname]

2215

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

2216

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

2217

config =

2218

client_settings

2219

[clientname]))

2220

2221

2715

2222

if not tcp_server.clients:

2716

2223

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

2224

2225

if not debug:

2226

try:

2227

with pidfile:

2228

pid = os.getpid()

2229

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

2230

del pidfile

2231

except IOError:

2232

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

2233

pidfilename, pid)

2234

except NameError:

2235

# "pidfile" was never created

2236

pass

2728

2237

del pidfilename

2238

2239

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

2729

2240

2730

2241

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

2731

2242

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

2732

2243

2733

2244

if use_dbus:

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2245

class MandosDBusService(dbus.service.Object):

2738

2246

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

2739

2740

2247

def __init__(self):

2741

2248

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

2742

2743

2249

_interface = "se.recompile.Mandos"

2744

2250

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2751

2251

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

2752

2252

def ClientAdded(self, objpath):

2753

2253

"D-Bus signal"

2766

2266

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

2767

2267

def GetAllClients(self):

2768

2268

"D-Bus method"

2769

return dbus.Array(c.dbus_object_path for c in

2269

return dbus.Array(c.dbus_object_path

2270

for c in

2770

2271

tcp_server.clients.itervalues())

2771

2272

2772

2273

@dbus.service.method(_interface,

2774

2275

def GetAllClientsWithProperties(self):

2775

2276

"D-Bus method"

2776

2277

return dbus.Dictionary(

2777

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

2778

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

2278

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

2279

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

2779

2280

signature="oa{sv}")

2780

2281

2781

2282

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

2794

2295

2795

2296

del _interface

2796

2297

2797

mandos_dbus_service = MandosDBusService()

2298

class MandosDBusServiceTransitional(MandosDBusService):

2299

__metaclass__ = AlternateDBusNamesMetaclass

2300

mandos_dbus_service = MandosDBusServiceTransitional()

2798

2301

2799

2302

def cleanup():

2800

2303

"Cleanup function; run on exit"

2801

if zeroconf:

2802

service.cleanup()

2304

service.cleanup()

2803

2305

2804

2306

multiprocessing.active_children()

2805

wnull.close()

2806

2307

if not (tcp_server.clients or client_settings):

2807

2308

return

2808

2809

# Store client before exiting. Secrets are encrypted with key

2810

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

2811

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

2812

clients = {}

2813

with PGPEngine() as pgp:

2814

for client in tcp_server.clients.itervalues():

2815

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

2816

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

2817

key)

2818

client_dict = {}

2819

2820

# A list of attributes that can not be pickled

2821

# + secret.

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2826

exclude.add(name)

2827

2828

client_dict["encrypted_secret"] = (client

2829

.encrypted_secret)

2830

for attr in client.client_structure:

2831

if attr not in exclude:

2832

client_dict[attr] = getattr(client, attr)

2833

2834

clients[client.name] = client_dict

2835

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

2836

2309

2310

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

2311

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

2312

# secret will thus be unrecovable.

2313

clients = []

2314

for client in tcp_server.clients.itervalues():

2315

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

2316

2317

client_dict = {}

2318

2319

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

2320

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

2321

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

2322

exclude.add(name)

2323

2324

client_dict["encrypted_secret"] = client.encrypted_secret

2325

for attr in client.client_structure:

2326

if attr not in exclude:

2327

client_dict[attr] = getattr(client, attr)

2328

2329

clients.append(client_dict)

2330

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

2331

2837

2332

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:

2333

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

2844

2334

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)

2335

except IOError as e:

2336

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

2337

if e.errno != errno.ENOENT:

2859

2338

raise

2860

2339

2861

2340

# Delete all clients, and settings from config

2862

2341

while tcp_server.clients:

2863

2342

name, client = tcp_server.clients.popitem()

2867

2346

client.disable(quiet=True)

2868

2347

if use_dbus:

2869

2348

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2349

mandos_dbus_service.ClientRemoved(client

2350

.dbus_object_path,

2351

client.name)

2872

2352

client_settings.clear()

2873

2353

2874

2354

atexit.register(cleanup)

2880

2360

# Need to initiate checking of clients

2881

2361

if client.enabled:

2882

2362

client.init_checker()

2363

2883

2364

2884

2365

tcp_server.enable()

2885

2366

tcp_server.server_activate()

2886

2367

2887

2368

# Find out what port we got

2888

if zeroconf:

2889

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

2369

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

2890

2370

if use_ipv6:

2891

2371

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

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2372

" flowinfo %d, scope_id %d"

2373

% tcp_server.socket.getsockname())

2894

2374

else: # IPv4

2895

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

2896

*tcp_server.socket.getsockname())

2375

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

2376

% tcp_server.socket.getsockname())

2897

2377

2898

2378

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

2899

2379

2900

2380

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

2381

# From the Avahi example code

2382

try:

2383

service.activate()

2384

except dbus.exceptions.DBusException as error:

2385

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

2386

cleanup()

2387

sys.exit(1)

2388

# End of Avahi example code

2910

2389

2911

2390

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

2912

2391

lambda *args, **kwargs:

2916

2395

logger.debug("Starting main loop")

2917

2396

main_loop.run()

2918

2397

except AvahiError as error:

2919

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

2398

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

2920

2399

cleanup()

2921

2400

sys.exit(1)

2922

2401

except KeyboardInterrupt: