/mandos/release : revision 237.7.362

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import hashlib

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import Crypto.Cipher.AES

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.4.1"

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

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', 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([self.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([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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254

pass

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127

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

322

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

323

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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335

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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345

avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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359

self.group.Commit()

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def entry_group_state_changed(self, state, error):

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362

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

214

363

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

220

369

self.rename()

221

370

elif state == avahi.ENTRY_GROUP_FAILURE:

222

371

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

223

unicode(error))

224

raise AvahiGroupError("State changed: %s"

225

% unicode(error))

372

str(error))

373

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

374

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375

def cleanup(self):

227

376

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

228

377

if self.group is not None:

229

378

try:

230

379

self.group.Free()

231

380

except (dbus.exceptions.UnknownMethodException,

232

dbus.exceptions.DBusException) as e:

381

dbus.exceptions.DBusException):

233

382

pass

234

383

self.group = None

235

384

self.remove()

385

236

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

237

387

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

238

388

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

239

bad_states = { avahi.SERVER_INVALID:

240

"Zeroconf server invalid",

241

avahi.SERVER_REGISTERING: None,

242

avahi.SERVER_COLLISION:

243

"Zeroconf server name collision",

244

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

389

bad_states = {

390

avahi.SERVER_INVALID: "Zeroconf server invalid",

391

avahi.SERVER_REGISTERING: None,

392

avahi.SERVER_COLLISION: "Zeroconf server name collision",

393

avahi.SERVER_FAILURE: "Zeroconf server failure",

394

}

246

395

if state in bad_states:

247

396

if bad_states[state] is not None:

248

397

if error is None:

251

400

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

252

401

self.cleanup()

253

402

elif state == avahi.SERVER_RUNNING:

254

self.add()

403

try:

404

self.add()

405

except dbus.exceptions.DBusException as error:

406

if (error.get_dbus_name()

407

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

408

logger.info("Local Zeroconf service name"

409

" collision.")

410

return self.rename(remove=False)

411

else:

412

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

413

self.cleanup()

414

os._exit(1)

255

415

else:

256

416

if error is None:

257

417

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

258

418

else:

259

419

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

420

260

421

def activate(self):

261

422

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

262

423

if self.server is None:

266

427

follow_name_owner_changes=True),

267

428

avahi.DBUS_INTERFACE_SERVER)

268

429

self.server.connect_to_signal("StateChanged",

269

self.server_state_changed)

430

self.server_state_changed)

270

431

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

271

432

272

433

273

def _timedelta_to_milliseconds(td):

274

"Convert a datetime.timedelta() to milliseconds"

275

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

276

+ (td.seconds * 1000)

277

+ (td.microseconds // 1000))

278

434

class AvahiServiceToSyslog(AvahiService):

435

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

436

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

437

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

438

syslogger.setFormatter(logging.Formatter(

439

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

440

.format(self.name)))

441

return ret

442

443

# Pretend that we have a GnuTLS module

444

class GnuTLS(object):

445

"""This isn't so much a class as it is a module-like namespace.

446

It is instantiated once, and simulates having a GnuTLS module."""

447

448

_library = ctypes.cdll.LoadLibrary(

449

ctypes.util.find_library("gnutls"))

450

_need_version = "3.3.0"

451

def __init__(self):

452

# Need to use class name "GnuTLS" here, since this method is

453

# called before the assignment to the "gnutls" global variable

454

# happens.

455

if GnuTLS.check_version(self._need_version) is None:

456

raise GnuTLS.Error("Needs GnuTLS {} or later"

457

.format(self._need_version))

458

459

# Unless otherwise indicated, the constants and types below are

460

# all from the gnutls/gnutls.h C header file.

461

462

# Constants

463

E_SUCCESS = 0

464

E_INTERRUPTED = -52

465

E_AGAIN = -28

466

CRT_OPENPGP = 2

467

CLIENT = 2

468

SHUT_RDWR = 0

469

CRD_CERTIFICATE = 1

470

E_NO_CERTIFICATE_FOUND = -49

471

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

472

473

# Types

474

class session_int(ctypes.Structure):

475

_fields_ = []

476

session_t = ctypes.POINTER(session_int)

477

class certificate_credentials_st(ctypes.Structure):

478

_fields_ = []

479

certificate_credentials_t = ctypes.POINTER(

480

certificate_credentials_st)

481

certificate_type_t = ctypes.c_int

482

class datum_t(ctypes.Structure):

483

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

484

('size', ctypes.c_uint)]

485

class openpgp_crt_int(ctypes.Structure):

486

_fields_ = []

487

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

488

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

489

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

490

credentials_type_t = ctypes.c_int #

491

transport_ptr_t = ctypes.c_void_p

492

close_request_t = ctypes.c_int

493

494

# Exceptions

495

class Error(Exception):

496

# We need to use the class name "GnuTLS" here, since this

497

# exception might be raised from within GnuTLS.__init__,

498

# which is called before the assignment to the "gnutls"

499

# global variable has happened.

500

def __init__(self, message = None, code = None, args=()):

501

# Default usage is by a message string, but if a return

502

# code is passed, convert it to a string with

503

# gnutls.strerror()

504

self.code = code

505

if message is None and code is not None:

506

message = GnuTLS.strerror(code)

507

return super(GnuTLS.Error, self).__init__(

508

message, *args)

509

510

class CertificateSecurityError(Error):

511

pass

512

513

# Classes

514

class Credentials(object):

515

def __init__(self):

516

self._c_object = gnutls.certificate_credentials_t()

517

gnutls.certificate_allocate_credentials(

518

ctypes.byref(self._c_object))

519

self.type = gnutls.CRD_CERTIFICATE

520

521

def __del__(self):

522

gnutls.certificate_free_credentials(self._c_object)

523

524

class ClientSession(object):

525

def __init__(self, socket, credentials = None):

526

self._c_object = gnutls.session_t()

527

gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

528

gnutls.set_default_priority(self._c_object)

529

gnutls.transport_set_ptr(self._c_object, socket.fileno())

530

gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

535

gnutls.credentials_set(self._c_object, credentials.type,

536

ctypes.cast(credentials._c_object,

537

ctypes.c_void_p))

538

self.credentials = credentials

539

540

def __del__(self):

541

gnutls.deinit(self._c_object)

542

543

def handshake(self):

544

return gnutls.handshake(self._c_object)

545

546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

551

data[-data_len:],

552

data_len)

553

554

def bye(self):

555

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

556

557

# Error handling functions

558

def _error_code(result):

559

"""A function to raise exceptions on errors, suitable

560

for the 'restype' attribute on ctypes functions"""

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

566

567

def _retry_on_error(result, func, arguments):

568

"""A function to retry on some errors, suitable

569

for the 'errcheck' attribute on ctypes functions"""

570

while result < 0:

571

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

572

return _error_code(result)

573

result = func(*arguments)

574

return result

575

576

# Unless otherwise indicated, the function declarations below are

577

# all from the gnutls/gnutls.h C header file.

578

579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

582

ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

584

585

init = _library.gnutls_init

586

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

587

init.restype = _error_code

588

589

set_default_priority = _library.gnutls_set_default_priority

590

set_default_priority.argtypes = [session_t]

591

set_default_priority.restype = _error_code

592

593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

598

599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

601

certificate_allocate_credentials.argtypes = [

602

ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

604

605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

613

ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

618

ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

624

625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

633

634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

# All the function declarations below are from gnutls/openpgp.h

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

# Create the global "gnutls" object, simulating a module

696

gnutls = GnuTLS()

697

698

def call_pipe(connection, # : multiprocessing.Connection

699

func, *args, **kwargs):

700

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

701

702

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

703

return value on the provided multiprocessing.Connection.

704

"""

705

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

706

connection.close()

707

279

708

class Client(object):

280

709

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

281

710

282

711

Attributes:

283

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

712

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

284

713

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

285

714

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

286

715

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

304

733

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

305

734

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

306

735

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

307

Last_checker_status: integer between 0 and 255 reflecting exit status

308

of last checker. -1 reflect crashed checker.

309

last_enabled: datetime.datetime(); (UTC)

736

last_checker_status: integer between 0 and 255 reflecting exit

737

status of last checker. -1 reflects crashed

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

741

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

310

742

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

311

743

D-Bus identifiers

312

744

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

313

745

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

314

746

until this client is disabled

315

extended_timeout: extra long timeout when password has been sent

747

extended_timeout: extra long timeout when secret has been sent

316

748

runtime_expansions: Allowed attributes for runtime expansion.

317

749

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

318

750

disabled, or None

751

server_settings: The server_settings dict from main()

319

752

"""

320

753

321

754

runtime_expansions = ("approval_delay", "approval_duration",

322

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

323

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

755

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

756

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

757

"last_approval_request", "last_checked_ok",

324

758

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

325

326

def timeout_milliseconds(self):

327

"Return the 'timeout' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.timeout)

329

330

def extended_timeout_milliseconds(self):

331

"Return the 'extended_timeout' attribute in milliseconds"

332

return _timedelta_to_milliseconds(self.extended_timeout)

333

334

def interval_milliseconds(self):

335

"Return the 'interval' attribute in milliseconds"

336

return _timedelta_to_milliseconds(self.interval)

337

338

def approval_delay_milliseconds(self):

339

return _timedelta_to_milliseconds(self.approval_delay)

340

341

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

342

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

343

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

344

attribute."""

759

client_defaults = {

760

"timeout": "PT5M",

761

"extended_timeout": "PT15M",

762

"interval": "PT2M",

763

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

764

"host": "",

765

"approval_delay": "PT0S",

766

"approval_duration": "PT1S",

767

"approved_by_default": "True",

768

"enabled": "True",

769

}

770

771

@staticmethod

772

def config_parser(config):

773

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

774

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

775

with exceptions for any special settings as defined above.

776

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

777

value given the same arguments.

778

"""

779

settings = {}

780

for client_name in config.sections():

781

section = dict(config.items(client_name))

782

client = settings[client_name] = {}

783

784

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

785

# Reformat values from string types to Python types

786

client["approved_by_default"] = config.getboolean(

787

client_name, "approved_by_default")

788

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

789

"enabled")

790

791

# Uppercase and remove spaces from fingerprint for later

792

# comparison purposes with return value from the

793

# fingerprint() function

794

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

795

.replace(" ", ""))

796

if "secret" in section:

797

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

798

elif "secfile" in section:

799

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

800

(section["secfile"])),

801

"rb") as secfile:

802

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

803

else:

804

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

805

.format(section))

806

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

807

client["extended_timeout"] = string_to_delta(

808

section["extended_timeout"])

809

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

810

client["approval_delay"] = string_to_delta(

811

section["approval_delay"])

812

client["approval_duration"] = string_to_delta(

813

section["approval_duration"])

814

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

815

client["last_approval_request"] = None

816

client["last_checked_ok"] = None

817

client["last_checker_status"] = -2

818

819

return settings

820

821

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

345

822

self.name = name

346

if config is None:

347

config = {}

823

if server_settings is None:

824

server_settings = {}

825

self.server_settings = server_settings

826

# adding all client settings

827

for setting, value in settings.items():

828

setattr(self, setting, value)

829

830

if self.enabled:

831

if not hasattr(self, "last_enabled"):

832

self.last_enabled = datetime.datetime.utcnow()

833

if not hasattr(self, "expires"):

834

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

835

+ self.timeout)

836

else:

837

self.last_enabled = None

838

self.expires = None

839

348

840

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

349

# Uppercase and remove spaces from fingerprint for later

350

# comparison purposes with return value from the fingerprint()

351

# function

352

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

353

.replace(" ", ""))

354

841

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

355

if "secret" in config:

356

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

357

elif "secfile" in config:

358

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

359

(config["secfile"])),

360

"rb") as secfile:

361

self.secret = secfile.read()

362

else:

363

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

364

% self.name)

365

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

366

self.created = datetime.datetime.utcnow()

367

self.enabled = True

368

self.last_approval_request = None

369

self.last_enabled = datetime.datetime.utcnow()

370

self.last_checked_ok = None

371

self.last_checker_status = 0

372

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

373

self.extended_timeout = string_to_delta(config

374

["extended_timeout"])

375

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

376

846

self.checker = None

377

847

self.checker_initiator_tag = None

378

848

self.disable_initiator_tag = None

379

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

380

849

self.checker_callback_tag = None

381

self.checker_command = config["checker"]

382

850

self.current_checker_command = None

383

self._approved = None

384

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

385

True)

851

self.approved = None

386

852

self.approvals_pending = 0

387

self.approval_delay = string_to_delta(

388

config["approval_delay"])

389

self.approval_duration = string_to_delta(

390

config["approval_duration"])

391

self.changedstate = (multiprocessing_manager

392

.Condition(multiprocessing_manager

393

.Lock()))

394

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

853

self.changedstate = multiprocessing_manager.Condition(

854

multiprocessing_manager.Lock())

855

self.client_structure = [attr

856

for attr in self.__dict__.iterkeys()

857

if not attr.startswith("_")]

395

858

self.client_structure.append("client_structure")

396

397

398

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

399

lambda obj: isinstance(obj, property)):

859

860

for name, t in inspect.getmembers(

861

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

400

862

if not name.startswith("_"):

401

863

self.client_structure.append(name)

402

864

403

865

# Send notice to process children that client state has changed

404

866

def send_changedstate(self):

405

self.changedstate.acquire()

406

self.changedstate.notify_all()

407

self.changedstate.release()

867

with self.changedstate:

868

self.changedstate.notify_all()

408

869

409

870

def enable(self):

410

871

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

411

872

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

412

873

# Already enabled

413

874

return

414

self.send_changedstate()

415

875

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

416

876

self.enabled = True

417

877

self.last_enabled = datetime.datetime.utcnow()

418

878

self.init_checker()

879

self.send_changedstate()

419

880

420

881

def disable(self, quiet=True):

421

882

"""Disable this client."""

422

883

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

423

884

return False

424

885

if not quiet:

425

self.send_changedstate()

426

if not quiet:

427

886

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

428

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

887

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

429

888

gobject.source_remove(self.disable_initiator_tag)

430

889

self.disable_initiator_tag = None

431

890

self.expires = None

432

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

891

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

433

892

gobject.source_remove(self.checker_initiator_tag)

434

893

self.checker_initiator_tag = None

435

894

self.stop_checker()

436

895

self.enabled = False

896

if not quiet:

897

self.send_changedstate()

437

898

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

438

899

return False

439

900

440

901

def __del__(self):

441

902

self.disable()

442

903

443

904

def init_checker(self):

444

905

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

445

906

# and every interval from then on.

446

self.checker_initiator_tag = (gobject.timeout_add

447

(self.interval_milliseconds(),

448

self.start_checker))

907

if self.checker_initiator_tag is not None:

908

gobject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = gobject.timeout_add(

910

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

911

self.start_checker)

449

912

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

450

self.disable_initiator_tag = (gobject.timeout_add

451

(self.timeout_milliseconds(),

452

self.disable))

913

if self.disable_initiator_tag is not None:

914

gobject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = gobject.timeout_add(

916

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

453

917

# Also start a new checker *right now*.

454

918

self.start_checker()

455

456

457

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

919

920

def checker_callback(self, source, condition, connection,

921

command):

458

922

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

459

923

self.checker_callback_tag = None

460

924

self.checker = None

461

if os.WIFEXITED(condition):

462

self.last_checker_status = os.WEXITSTATUS(condition)

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

463

932

if self.last_checker_status == 0:

464

933

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

465

934

vars(self))

466

935

self.checked_ok()

467

936

else:

468

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

469

vars(self))

937

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

470

938

else:

471

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

472

941

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

473

942

vars(self))

474

475

def checked_ok(self, timeout=None):

476

"""Bump up the timeout for this client.

477

478

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

479

alive and well.

480

"""

943

return False

944

945

def checked_ok(self):

946

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

947

self.last_checked_ok = datetime.datetime.utcnow()

948

self.last_checker_status = 0

949

self.last_checker_signal = None

950

self.bump_timeout()

951

952

def bump_timeout(self, timeout=None):

953

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

481

954

if timeout is None:

482

955

timeout = self.timeout

483

self.last_checked_ok = datetime.datetime.utcnow()

484

956

if self.disable_initiator_tag is not None:

485

957

gobject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

486

959

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

487

self.disable_initiator_tag = (gobject.timeout_add

488

(_timedelta_to_milliseconds

489

(timeout), self.disable))

960

self.disable_initiator_tag = gobject.timeout_add(

961

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

490

962

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

491

963

492

964

def need_approval(self):

498

970

If a checker already exists, leave it running and do

499

971

nothing."""

500

972

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

501

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

502

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

503

# client would inevitably timeout, since no checker would get

504

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

973

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

974

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

975

# would inevitably timeout, since no checker would get a

976

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

505

977

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

506

978

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

507

979

# should be.

508

980

509

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

510

try:

511

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

512

except (AttributeError, OSError) as error:

513

if (isinstance(error, OSError)

514

and error.errno != errno.ECHILD):

515

raise error

516

else:

517

if pid:

518

logger.warning("Checker was a zombie")

519

gobject.source_remove(self.checker_callback_tag)

520

self.checker_callback(pid, status,

521

self.current_checker_command)

981

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

982

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

983

self.checker.join()

984

self.checker = None

522

985

# Start a new checker if needed

523

986

if self.checker is None:

987

# Escape attributes for the shell

988

escaped_attrs = {

989

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

990

for attr in self.runtime_expansions }

524

991

try:

525

# In case checker_command has exactly one % operator

526

command = self.checker_command % self.host

527

except TypeError:

528

# Escape attributes for the shell

529

escaped_attrs = dict(

530

(attr,

531

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

532

errors=

533

'replace')))

534

for attr in

535

self.runtime_expansions)

536

537

try:

538

command = self.checker_command % escaped_attrs

539

except TypeError as error:

540

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

541

' %s', self.checker_command, error)

542

return True # Try again later

992

command = self.checker_command % escaped_attrs

993

except TypeError as error:

994

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

995

self.checker_command,

996

exc_info=error)

997

return True # Try again later

543

998

self.current_checker_command = command

544

try:

545

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

546

command, self.name)

547

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

548

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

549

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

550

# always replaced by /dev/null.)

551

self.checker = subprocess.Popen(command,

552

close_fds=True,

553

shell=True, cwd="/")

554

self.checker_callback_tag = (gobject.child_watch_add

555

(self.checker.pid,

556

self.checker_callback,

557

data=command))

558

# The checker may have completed before the gobject

559

# watch was added. Check for this.

560

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

561

if pid:

562

gobject.source_remove(self.checker_callback_tag)

563

self.checker_callback(pid, status, command)

564

except OSError as error:

565

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

566

error)

999

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

1000

self.name)

1001

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

1002

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

1003

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

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

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

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = gobject.io_add_watch(

1022

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

1023

self.checker_callback, pipe[0], command)

567

1024

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

568

1025

return True

569

1026

575

1032

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

576

1033

return

577

1034

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

578

try:

579

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

580

#time.sleep(0.5)

581

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

582

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

583

except OSError as error:

584

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

585

raise

1035

self.checker.terminate()

586

1036

self.checker = None

587

1037

588

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

589

def encrypt_secret(self, key):

590

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

591

hasheng = hashlib.sha256()

592

hasheng.update(key)

593

encryptionkey = hasheng.digest()

594

595

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

596

hasheng = hashlib.sha256()

597

hasheng.update(self.secret)

598

validationhash = hasheng.digest()

599

600

# Encrypt secret

601

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

602

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

603

Crypto.Cipher.AES.MODE_CFB, iv)

604

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

605

self.encrypted_secret = (ciphertext, iv)

606

607

# Decrypt a encrypted client secret

608

def decrypt_secret(self, key):

609

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

610

hasheng = hashlib.sha256()

611

hasheng.update(key)

612

encryptionkey = hasheng.digest()

613

614

# Decrypt encrypted secret

615

ciphertext, iv = self.encrypted_secret

616

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

617

Crypto.Cipher.AES.MODE_CFB, iv)

618

plain = ciphereng.decrypt(ciphertext)

619

620

# Validate decrypted secret to know if it was succesful

621

hasheng = hashlib.sha256()

622

validationhash = plain[:hasheng.digest_size]

623

secret = plain[hasheng.digest_size:]

624

hasheng.update(secret)

625

626

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

627

# the decrypted secret

628

if hasheng.digest() == validationhash:

629

self.secret = secret

630

else:

631

self.secret = key

632

del self.encrypted_secret

633

634

635

def dbus_service_property(dbus_interface, signature="v",

636

access="readwrite", byte_arrays=False):

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

637

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

638

1044

become properties on the D-Bus.

639

1045

648

1054

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

649

1055

if byte_arrays and signature != "ay":

650

1056

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

651

" signature %r" % signature)

1057

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

1058

652

1059

def decorator(func):

653

1060

func._dbus_is_property = True

654

1061

func._dbus_interface = dbus_interface

659

1066

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

660

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

661

1068

return func

1069

1070

return decorator

1071

1072

1073

def dbus_interface_annotations(dbus_interface):

1074

"""Decorator for marking functions returning interface annotations

1075

1076

Usage:

1077

1078

@dbus_interface_annotations("org.example.Interface")

1079

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

1080

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

1081

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

1082

"false"}

1083

"""

1084

1085

def decorator(func):

1086

func._dbus_is_interface = True

1087

func._dbus_interface = dbus_interface

1088

func._dbus_name = dbus_interface

1089

return func

1090

1091

return decorator

1092

1093

1094

def dbus_annotations(annotations):

1095

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

1096

Usage:

1097

1098

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

1099

"org.freedesktop.DBus.Property."

1100

"EmitsChangedSignal": "false"})

1101

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

1102

access="r")

1103

def Property_dbus_property(self):

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

1107

"""

1108

1109

def decorator(func):

1110

func._dbus_annotations = annotations

1111

return func

1112

662

1113

return decorator

663

1114

664

1115

665

1116

class DBusPropertyException(dbus.exceptions.DBusException):

666

1117

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

667

1118

"""

668

def __unicode__(self):

669

return unicode(str(self))

1119

pass

670

1120

671

1121

672

1122

class DBusPropertyAccessException(DBusPropertyException):

681

1131

pass

682

1132

683

1133

684

class DBusObjectWithProperties(dbus.service.Object):

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

1136

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

1139

"""

1140

1141

@staticmethod

1142

def _is_dbus_thing(thing):

1143

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

1144

1145

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

1146

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

1147

"""

1148

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

1149

False)

1150

1151

def _get_all_dbus_things(self, thing):

1152

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

1153

"""

1154

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

1155

athing.__get__(self))

1156

for cls in self.__class__.__mro__

1157

for name, athing in

1158

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

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

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

1170

connection)

1171

try:

1172

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

1173

1174

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

1175

# Add annotation tags

1176

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

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

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

1182

and prop._dbus_interface

1183

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

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

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

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

for cn in if_tag.getElementsByTagName("method"):

1208

if cn.getAttribute("name") == "Introspect":

1209

for arg in cn.getElementsByTagName("arg"):

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

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

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

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

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

685

1224

"""A D-Bus object with properties.

686

1225

687

1226

Classes inheriting from this can use the dbus_service_property

689

1228

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

690

1229

"""

691

1230

692

@staticmethod

693

def _is_dbus_property(obj):

694

return getattr(obj, "_dbus_is_property", False)

695

696

def _get_all_dbus_properties(self):

697

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

698

"""

699

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

700

for cls in self.__class__.__mro__

701

for name, prop in

702

inspect.getmembers(cls, self._is_dbus_property))

703

704

1231

def _get_dbus_property(self, interface_name, property_name):

705

1232

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

706

1233

property with the specified name and interface.

707

1234

"""

708

for cls in self.__class__.__mro__:

709

for name, value in (inspect.getmembers

710

(cls, self._is_dbus_property)):

1235

for cls in self.__class__.__mro__:

1236

for name, value in inspect.getmembers(

1237

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

711

1238

if (value._dbus_name == property_name

712

1239

and value._dbus_interface == interface_name):

713

1240

return value.__get__(self)

714

1241

715

1242

# No such property

716

raise DBusPropertyNotFound(self.dbus_object_path + ":"

717

+ interface_name + "."

718

+ property_name)

719

720

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

1243

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

1244

self.dbus_object_path, interface_name, property_name))

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

"""Get a sequence of all interfaces supported by an object"""

1249

return (name for name in set(getattr(getattr(x, attr),

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

1256

in_signature="ss",

721

1257

out_signature="v")

722

1258

def Get(self, interface_name, property_name):

723

1259

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

741

1277

# The byte_arrays option is not supported yet on

742

1278

# signatures other than "ay".

743

1279

if prop._dbus_signature != "ay":

744

raise ValueError

745

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

746

for byte in value))

1280

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

1281

"'ay' signature {!r}"

1282

.format(prop._dbus_signature))

1283

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

1284

for byte in value))

747

1285

prop(value)

748

1286

749

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

750

1289

out_signature="a{sv}")

751

1290

def GetAll(self, interface_name):

752

1291

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

754

1293

755

1294

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

756

1295

"""

757

all = {}

758

for name, prop in self._get_all_dbus_properties():

1296

properties = {}

1297

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

759

1298

if (interface_name

760

1299

and interface_name != prop._dbus_interface):

761

1300

# Interface non-empty but did not match

765

1304

continue

766

1305

value = prop()

767

1306

if not hasattr(value, "variant_level"):

768

all[name] = value

1307

properties[name] = value

769

1308

continue

770

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

771

value.variant_level+1)

772

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

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

1311

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

1312

1313

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

1314

def PropertiesChanged(self, interface_name, changed_properties,

1315

invalidated_properties):

1316

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

1317

standard.

1318

"""

1319

pass

773

1320

774

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

775

1322

out_signature="s",

776

1323

path_keyword='object_path',

777

1324

connection_keyword='connection')

778

1325

def Introspect(self, object_path, connection):

779

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

1326

"""Overloading of standard D-Bus method.

1327

1328

Inserts property tags and interface annotation tags.

780

1329

"""

781

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

782

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

783

1333

try:

784

1334

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

1335

785

1336

def make_tag(document, name, prop):

786

1337

e = document.createElement("property")

787

1338

e.setAttribute("name", name)

788

1339

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

789

1340

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

790

1341

return e

1342

791

1343

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

1344

# Add property tags

792

1345

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

793

1346

for name, prop

794

in self._get_all_dbus_properties()

1347

in self._get_all_dbus_things("property")

795

1348

if prop._dbus_interface

796

1349

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

797

1350

if_tag.appendChild(tag)

1351

# Add annotation tags for properties

1352

for tag in if_tag.getElementsByTagName("property"):

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

798

1367

# Add the names to the return values for the

799

1368

# "org.freedesktop.DBus.Properties" methods

800

1369

if (if_tag.getAttribute("name")

815

1384

except (AttributeError, xml.dom.DOMException,

816

1385

xml.parsers.expat.ExpatError) as error:

817

1386

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

818

error)

819

return xmlstring

820

821

822

def datetime_to_dbus (dt, variant_level=0):

1387

exc_info=error)

1388

return xmlstring

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

"""A D-Bus object with an ObjectManager.

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

Note: No signals are sent automatically; they must be sent

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

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

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

signature = "oa{sa{sv}}")

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

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

1436

1437

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

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

for cn in if_tag.getElementsByTagName("method"):

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

for arg in cn.getElementsByTagName("arg"):

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

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

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

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

1456

exc_info = error)

1457

return xmlstring

1458

1459

def datetime_to_dbus(dt, variant_level=0):

823

1460

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

824

1461

if dt is None:

825

1462

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

826

return dbus.String(dt.isoformat(),

827

variant_level=variant_level)

828

829

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

830

.__metaclass__):

831

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

832

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

1463

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

1464

1465

1466

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1467

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

1468

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

1469

interface names according to the "alt_interface_names" mapping.

1470

Usage:

1471

1472

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

1473

"net.example.AlternateInterface"})

1474

class SampleDBusObject(dbus.service.Object):

1475

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

1476

def SampleDBusMethod():

1477

pass

1478

1479

The above "SampleDBusMethod" on "SampleDBusObject" will be

1480

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

1481

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

1482

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

1483

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

1484

1485

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

1486

(from DBusObjectWithProperties) and interfaces (from the

1487

dbus_interface_annotations decorator).

833

1488

"""

834

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

835

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

836

# methods, signals, or properties in them

837

for base in (b for b in bases

838

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

839

# Go though all attributes of the base class

840

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

1489

1490

def wrapper(cls):

1491

for orig_interface_name, alt_interface_name in (

1492

alt_interface_names.items()):

1493

attr = {}

1494

interface_names = set()

1495

# Go though all attributes of the class

1496

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

841

1497

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

842

1498

# with the wrong interface name

843

1499

if (not hasattr(attribute, "_dbus_interface")

844

or not attribute._dbus_interface

845

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

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

846

1502

continue

847

1503

# Create an alternate D-Bus interface name based on

848

1504

# the current name

849

alt_interface = (attribute._dbus_interface

850

.replace("se.recompile.Mandos",

851

"se.bsnet.fukt.Mandos"))

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

852

1508

# Is this a D-Bus signal?

853

1509

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

854

# Extract the original non-method function by

855

# black magic

856

nonmethod_func = (dict(

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

857

1514

zip(attribute.func_code.co_freevars,

858

attribute.__closure__))["func"]

859

.cell_contents)

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

860

1519

# Create a new, but exactly alike, function

861

1520

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

862

1521

# with the alternate D-Bus interface name

863

new_function = (dbus.service.signal

864

(alt_interface,

865

attribute._dbus_signature)

866

(types.FunctionType(

867

nonmethod_func.func_code,

868

nonmethod_func.func_globals,

869

nonmethod_func.func_name,

870

nonmethod_func.func_defaults,

871

nonmethod_func.func_closure)))

1522

if sys.version_info.major == 2:

1523

new_function = types.FunctionType(

1524

nonmethod_func.func_code,

1525

nonmethod_func.func_globals,

1526

nonmethod_func.func_name,

1527

nonmethod_func.func_defaults,

1528

nonmethod_func.func_closure)

1529

else:

1530

new_function = types.FunctionType(

1531

nonmethod_func.__code__,

1532

nonmethod_func.__globals__,

1533

nonmethod_func.__name__,

1534

nonmethod_func.__defaults__,

1535

nonmethod_func.__closure__)

1536

new_function = (dbus.service.signal(

1537

alt_interface,

1538

attribute._dbus_signature)(new_function))

1539

# Copy annotations, if any

1540

try:

1541

new_function._dbus_annotations = dict(

1542

attribute._dbus_annotations)

1543

except AttributeError:

1544

pass

872

1545

# Define a creator of a function to call both the

873

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

874

# signals gets sent when the function is called

1546

# original and alternate functions, so both the

1547

# original and alternate signals gets sent when

1548

# the function is called

875

1549

def fixscope(func1, func2):

876

1550

"""This function is a scope container to pass

877

1551

func1 and func2 to the "call_both" function

878

1552

outside of its arguments"""

1553

1554

@functools.wraps(func2)

879

1555

def call_both(*args, **kwargs):

880

1556

"""This function will emit two D-Bus

881

1557

signals by calling func1 and func2"""

882

1558

func1(*args, **kwargs)

883

1559

func2(*args, **kwargs)

1560

# Make wrapper function look like a D-Bus signal

1561

for name, attr in inspect.getmembers(func2):

1562

if name.startswith("_dbus_"):

1563

setattr(call_both, name, attr)

1564

884

1565

return call_both

885

1566

# Create the "call_both" function and add it to

886

1567

# the class

887

attr[attrname] = fixscope(attribute,

888

new_function)

1568

attr[attrname] = fixscope(attribute, new_function)

889

1569

# Is this a D-Bus method?

890

1570

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

891

1571

# Create a new, but exactly alike, function

892

1572

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

893

1573

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

894

1574

# to the class.

895

attr[attrname] = (dbus.service.method

896

(alt_interface,

897

attribute._dbus_in_signature,

898

attribute._dbus_out_signature)

899

(types.FunctionType

900

(attribute.func_code,

901

attribute.func_globals,

902

attribute.func_name,

903

attribute.func_defaults,

904

attribute.func_closure)))

1575

attr[attrname] = (

1576

dbus.service.method(

1577

alt_interface,

1578

attribute._dbus_in_signature,

1579

attribute._dbus_out_signature)

1580

(types.FunctionType(attribute.func_code,

1581

attribute.func_globals,

1582

attribute.func_name,

1583

attribute.func_defaults,

1584

attribute.func_closure)))

1585

# Copy annotations, if any

1586

try:

1587

attr[attrname]._dbus_annotations = dict(

1588

attribute._dbus_annotations)

1589

except AttributeError:

1590

pass

905

1591

# Is this a D-Bus property?

906

1592

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

907

1593

# Create a new, but exactly alike, function

908

1594

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

909

1595

# property with the alternate D-Bus interface

910

1596

# name. Add it to the class.

911

attr[attrname] = (dbus_service_property

912

(alt_interface,

913

attribute._dbus_signature,

914

attribute._dbus_access,

915

attribute

916

._dbus_get_args_options

917

["byte_arrays"])

918

(types.FunctionType

919

(attribute.func_code,

920

attribute.func_globals,

921

attribute.func_name,

922

attribute.func_defaults,

923

attribute.func_closure)))

924

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

925

1597

attr[attrname] = (dbus_service_property(

1598

alt_interface, attribute._dbus_signature,

1599

attribute._dbus_access,

1600

attribute._dbus_get_args_options

1601

["byte_arrays"])

1602

(types.FunctionType(

1603

attribute.func_code,

1604

attribute.func_globals,

1605

attribute.func_name,

1606

attribute.func_defaults,

1607

attribute.func_closure)))

1608

# Copy annotations, if any

1609

try:

1610

attr[attrname]._dbus_annotations = dict(

1611

attribute._dbus_annotations)

1612

except AttributeError:

1613

pass

1614

# Is this a D-Bus interface?

1615

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

1616

# Create a new, but exactly alike, function

1617

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

1618

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

1619

# to the class.

1620

attr[attrname] = (

1621

dbus_interface_annotations(alt_interface)

1622

(types.FunctionType(attribute.func_code,

1623

attribute.func_globals,

1624

attribute.func_name,

1625

attribute.func_defaults,

1626

attribute.func_closure)))

1627

if deprecate:

1628

# Deprecate all alternate interfaces

1629

iname="_AlternateDBusNames_interface_annotation{}"

1630

for interface_name in interface_names:

1631

1632

@dbus_interface_annotations(interface_name)

1633

def func(self):

1634

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

1635

"true" }

1636

# Find an unused name

1637

for aname in (iname.format(i)

1638

for i in itertools.count()):

1639

if aname not in attr:

1640

attr[aname] = func

1641

break

1642

if interface_names:

1643

# Replace the class with a new subclass of it with

1644

# methods, signals, etc. as created above.

1645

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

1646

(cls, ), attr)

1647

return cls

1648

1649

return wrapper

1650

1651

1652

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

1653

"se.bsnet.fukt.Mandos"})

926

1654

class ClientDBus(Client, DBusObjectWithProperties):

927

1655

"""A Client class using D-Bus

928

1656

932

1660

"""

933

1661

934

1662

runtime_expansions = (Client.runtime_expansions

935

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

936

1666

937

1667

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

938

1668

939

1669

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

940

1670

self.bus = bus

941

1671

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

942

943

self._approvals_pending = 0

944

1672

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

945

1673

# the D-Bus

946

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

947

1675

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

948

1676

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

949

self.dbus_object_path = (dbus.ObjectPath

950

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

951

1679

DBusObjectWithProperties.__init__(self, self.bus,

952

1680

self.dbus_object_path)

953

954

def notifychangeproperty(transform_func,

955

dbus_name, type_func=lambda x: x,

956

variant_level=1):

1681

1682

def notifychangeproperty(transform_func, dbus_name,

1683

type_func=lambda x: x,

1684

variant_level=1,

1685

invalidate_only=False,

1686

_interface=_interface):

957

1687

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

958

1688

its changes to DBus.

959

1689

960

1690

transform_fun: Function that takes a value and a variant_level

961

1691

and transforms it to a D-Bus type.

962

1692

dbus_name: D-Bus name of the variable

964

1694

to the D-Bus. Default: no transform

965

1695

variant_level: D-Bus variant level. Default: 1

966

1696

"""

967

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

1697

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

1698

968

1699

def setter(self, value):

969

1700

if hasattr(self, "dbus_object_path"):

970

1701

if (not hasattr(self, attrname) or

971

1702

type_func(getattr(self, attrname, None))

972

1703

!= type_func(value)):

973

dbus_value = transform_func(type_func(value),

974

variant_level

975

=variant_level)

976

self.PropertyChanged(dbus.String(dbus_name),

977

dbus_value)

1704

if invalidate_only:

1705

self.PropertiesChanged(

1706

_interface, dbus.Dictionary(),

1707

dbus.Array((dbus_name, )))

1708

else:

1709

dbus_value = transform_func(

1710

type_func(value),

1711

variant_level = variant_level)

1712

self.PropertyChanged(dbus.String(dbus_name),

1713

dbus_value)

1714

self.PropertiesChanged(

1715

_interface,

1716

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

1717

dbus_value }),

1718

dbus.Array())

978

1719

setattr(self, attrname, value)

979

1720

980

1721

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

981

1722

982

983

1723

expires = notifychangeproperty(datetime_to_dbus, "Expires")

984

1724

approvals_pending = notifychangeproperty(dbus.Boolean,

985

1725

"ApprovalPending",

987

1727

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

988

1728

last_enabled = notifychangeproperty(datetime_to_dbus,

989

1729

"LastEnabled")

990

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

991

type_func = lambda checker:

992

checker is not None)

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

993

1733

last_checked_ok = notifychangeproperty(datetime_to_dbus,

994

1734

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

995

1737

last_approval_request = notifychangeproperty(

996

1738

datetime_to_dbus, "LastApprovalRequest")

997

1739

approved_by_default = notifychangeproperty(dbus.Boolean,

998

1740

"ApprovedByDefault")

999

approval_delay = notifychangeproperty(dbus.UInt16,

1000

"ApprovalDelay",

1001

type_func =

1002

_timedelta_to_milliseconds)

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1003

1744

approval_duration = notifychangeproperty(

1004

dbus.UInt16, "ApprovalDuration",

1005

type_func = _timedelta_to_milliseconds)

1745

dbus.UInt64, "ApprovalDuration",

1746

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

1006

1747

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

1007

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

1008

type_func =

1009

_timedelta_to_milliseconds)

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1010

1751

extended_timeout = notifychangeproperty(

1011

dbus.UInt16, "ExtendedTimeout",

1012

type_func = _timedelta_to_milliseconds)

1013

interval = notifychangeproperty(dbus.UInt16,

1014

"Interval",

1015

type_func =

1016

_timedelta_to_milliseconds)

1752

dbus.UInt64, "ExtendedTimeout",

1753

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

1754

interval = notifychangeproperty(

1755

dbus.UInt64, "Interval",

1756

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

1017

1757

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

1758

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

1759

invalidate_only=True)

1018

1760

1019

1761

del notifychangeproperty

1020

1762

1027

1769

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

1028

1770

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

1029

1771

1030

def checker_callback(self, pid, condition, command,

1031

*args, **kwargs):

1032

self.checker_callback_tag = None

1033

self.checker = None

1034

if os.WIFEXITED(condition):

1035

exitstatus = os.WEXITSTATUS(condition)

1772

def checker_callback(self, source, condition,

1773

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

1774

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

1775

connection, command, *args,

1776

**kwargs)

1777

exitstatus = self.last_checker_status

1778

if exitstatus >= 0:

1036

1779

# Emit D-Bus signal

1037

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

1038

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

1039

1783

dbus.String(command))

1040

1784

else:

1041

1785

# Emit D-Bus signal

1042

1786

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

1043

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

1044

1791

dbus.String(command))

1045

1046

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

1047

*args, **kwargs)

1792

return ret

1048

1793

1049

1794

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

1050

old_checker = self.checker

1051

if self.checker is not None:

1052

old_checker_pid = self.checker.pid

1053

else:

1054

old_checker_pid = None

1795

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

1055

1796

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

1056

1797

# Only if new checker process was started

1057

1798

if (self.checker is not None

1061

1802

return r

1062

1803

1063

1804

def _reset_approved(self):

1064

self._approved = None

1805

self.approved = None

1065

1806

return False

1066

1807

1067

1808

def approve(self, value=True):

1809

self.approved = value

1810

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

1811

* 1000), self._reset_approved)

1068

1812

self.send_changedstate()

1069

self._approved = value

1070

gobject.timeout_add(_timedelta_to_milliseconds

1071

(self.approval_duration),

1072

self._reset_approved)

1073

1074

1813

1075

1814

## D-Bus methods, signals & properties

1076

_interface = "se.recompile.Mandos.Client"

1815

1816

## Interfaces

1077

1817

1078

1818

## Signals

1079

1819

1090

1830

pass

1091

1831

1092

1832

# PropertyChanged - signal

1833

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

1093

1834

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

1094

1835

def PropertyChanged(self, property, value):

1095

1836

"D-Bus signal"

1129

1870

self.checked_ok()

1130

1871

1131

1872

# Enable - method

1873

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

1132

1874

@dbus.service.method(_interface)

1133

1875

def Enable(self):

1134

1876

"D-Bus method"

1135

1877

self.enable()

1136

1878

1137

1879

# StartChecker - method

1880

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

1138

1881

@dbus.service.method(_interface)

1139

1882

def StartChecker(self):

1140

1883

"D-Bus method"

1141

1884

self.start_checker()

1142

1885

1143

1886

# Disable - method

1887

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

1144

1888

@dbus.service.method(_interface)

1145

1889

def Disable(self):

1146

1890

"D-Bus method"

1147

1891

self.disable()

1148

1892

1149

1893

# StopChecker - method

1894

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

1150

1895

@dbus.service.method(_interface)

1151

1896

def StopChecker(self):

1152

1897

self.stop_checker()

1159

1904

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

1160

1905

1161

1906

# ApprovedByDefault - property

1162

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

1163

1909

access="readwrite")

1164

1910

def ApprovedByDefault_dbus_property(self, value=None):

1165

1911

if value is None: # get

1167

1913

self.approved_by_default = bool(value)

1168

1914

1169

1915

# ApprovalDelay - property

1170

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

1171

1918

access="readwrite")

1172

1919

def ApprovalDelay_dbus_property(self, value=None):

1173

1920

if value is None: # get

1174

return dbus.UInt64(self.approval_delay_milliseconds())

1921

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

1922

* 1000)

1175

1923

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

1176

1924

1177

1925

# ApprovalDuration - property

1178

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

1179

1928

access="readwrite")

1180

1929

def ApprovalDuration_dbus_property(self, value=None):

1181

1930

if value is None: # get

1182

return dbus.UInt64(_timedelta_to_milliseconds(

1183

self.approval_duration))

1931

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

1932

* 1000)

1184

1933

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

1185

1934

1186

1935

# Name - property

1936

@dbus_annotations(

1937

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1187

1938

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

1188

1939

def Name_dbus_property(self):

1189

1940

return dbus.String(self.name)

1190

1941

1191

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1192

1945

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

1193

1946

def Fingerprint_dbus_property(self):

1194

1947

return dbus.String(self.fingerprint)

1195

1948

1196

1949

# Host - property

1197

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1198

1952

access="readwrite")

1199

1953

def Host_dbus_property(self, value=None):

1200

1954

if value is None: # get

1201

1955

return dbus.String(self.host)

1202

self.host = value

1956

self.host = str(value)

1203

1957

1204

1958

# Created - property

1959

@dbus_annotations(

1960

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1205

1961

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

1206

1962

def Created_dbus_property(self):

1207

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

1963

return datetime_to_dbus(self.created)

1208

1964

1209

1965

# LastEnabled - property

1210

1966

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

1212

1968

return datetime_to_dbus(self.last_enabled)

1213

1969

1214

1970

# Enabled - property

1215

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1216

1973

access="readwrite")

1217

1974

def Enabled_dbus_property(self, value=None):

1218

1975

if value is None: # get

1223

1980

self.disable()

1224

1981

1225

1982

# LastCheckedOK - property

1226

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1227

1985

access="readwrite")

1228

1986

def LastCheckedOK_dbus_property(self, value=None):

1229

1987

if value is not None:

1231

1989

return

1232

1990

return datetime_to_dbus(self.last_checked_ok)

1233

1991

1992

# LastCheckerStatus - property

1993

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

1994

def LastCheckerStatus_dbus_property(self):

1995

return dbus.Int16(self.last_checker_status)

1996

1234

1997

# Expires - property

1235

1998

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

1236

1999

def Expires_dbus_property(self):

1242

2005

return datetime_to_dbus(self.last_approval_request)

1243

2006

1244

2007

# Timeout - property

1245

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1246

2010

access="readwrite")

1247

2011

def Timeout_dbus_property(self, value=None):

1248

2012

if value is None: # get

1249

return dbus.UInt64(self.timeout_milliseconds())

2013

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

2014

old_timeout = self.timeout

1250

2015

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

1251

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

1252

return

1253

# Reschedule timeout

1254

gobject.source_remove(self.disable_initiator_tag)

1255

self.disable_initiator_tag = None

1256

self.expires = None

1257

time_to_die = _timedelta_to_milliseconds((self

1258

.last_checked_ok

1259

+ self.timeout)

1260

- datetime.datetime

1261

.utcnow())

1262

if time_to_die <= 0:

1263

# The timeout has passed

1264

self.disable()

1265

else:

1266

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

1267

+ datetime.timedelta(milliseconds =

1268

time_to_die))

1269

self.disable_initiator_tag = (gobject.timeout_add

1270

(time_to_die, self.disable))

2016

# Reschedule disabling

2017

if self.enabled:

2018

now = datetime.datetime.utcnow()

2019

self.expires += self.timeout - old_timeout

2020

if self.expires <= now:

2021

# The timeout has passed

2022

self.disable()

2023

else:

2024

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

2025

is None):

2026

return

2027

gobject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = gobject.timeout_add(

2029

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

2030

self.disable)

1271

2031

1272

2032

# ExtendedTimeout - property

1273

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1274

2035

access="readwrite")

1275

2036

def ExtendedTimeout_dbus_property(self, value=None):

1276

2037

if value is None: # get

1277

return dbus.UInt64(self.extended_timeout_milliseconds())

2038

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

2039

* 1000)

1278

2040

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

1279

2041

1280

2042

# Interval - property

1281

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1282

2045

access="readwrite")

1283

2046

def Interval_dbus_property(self, value=None):

1284

2047

if value is None: # get

1285

return dbus.UInt64(self.interval_milliseconds())

2048

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

1286

2049

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

1287

2050

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

1288

2051

return

1289

# Reschedule checker run

1290

gobject.source_remove(self.checker_initiator_tag)

1291

self.checker_initiator_tag = (gobject.timeout_add

1292

(value, self.start_checker))

1293

self.start_checker() # Start one now, too

2052

if self.enabled:

2053

# Reschedule checker run

2054

gobject.source_remove(self.checker_initiator_tag)

2055

self.checker_initiator_tag = gobject.timeout_add(

2056

value, self.start_checker)

2057

self.start_checker() # Start one now, too

1294

2058

1295

2059

# Checker - property

1296

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1297

2062

access="readwrite")

1298

2063

def Checker_dbus_property(self, value=None):

1299

2064

if value is None: # get

1300

2065

return dbus.String(self.checker_command)

1301

self.checker_command = value

2066

self.checker_command = str(value)

1302

2067

1303

2068

# CheckerRunning - property

1304

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1305

2071

access="readwrite")

1306

2072

def CheckerRunning_dbus_property(self, value=None):

1307

2073

if value is None: # get

1312

2078

self.stop_checker()

1313

2079

1314

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2083

"org.freedesktop.DBus.Deprecated": "true"})

1315

2084

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

1316

2085

def ObjectPath_dbus_property(self):

1317

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1318

2087

1319

2088

# Secret = property

1320

@dbus_service_property(_interface, signature="ay",

1321

access="write", byte_arrays=True)

2089

@dbus_annotations(

2090

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

2091

"invalidates"})

2092

@dbus_service_property(_interface,

2093

signature="ay",

2094

access="write",

2095

byte_arrays=True)

1322

2096

def Secret_dbus_property(self, value):

1323

self.secret = str(value)

2097

self.secret = bytes(value)

1324

2098

1325

2099

del _interface

1326

2100

1330

2104

self._pipe = child_pipe

1331

2105

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

1332

2106

if not self._pipe.recv():

1333

raise KeyError()

2107

raise KeyError(fpr)

1334

2108

1335

2109

def __getattribute__(self, name):

1336

if(name == '_pipe'):

2110

if name == '_pipe':

1337

2111

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

1338

2112

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

1339

2113

data = self._pipe.recv()

1340

2114

if data[0] == 'data':

1341

2115

return data[1]

1342

2116

if data[0] == 'function':

2117

1343

2118

def func(*args, **kwargs):

1344

2119

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

1345

2120

return self._pipe.recv()[1]

2121

1346

2122

return func

1347

2123

1348

2124

def __setattr__(self, name, value):

1349

if(name == '_pipe'):

2125

if name == '_pipe':

1350

2126

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

1351

2127

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

1352

2128

1353

class ClientDBusTransitional(ClientDBus):

1354

__metaclass__ = AlternateDBusNamesMetaclass

1355

2129

1356

2130

class ClientHandler(socketserver.BaseRequestHandler, object):

1357

2131

"""A class to handle client connections.

1362

2136

def handle(self):

1363

2137

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

1364

2138

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

1365

unicode(self.client_address))

2139

str(self.client_address))

1366

2140

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

1367

2141

self.server.child_pipe.fileno())

1368

2142

1369

session = (gnutls.connection

1370

.ClientSession(self.request,

1371

gnutls.connection

1372

.X509Credentials()))

1373

1374

# Note: gnutls.connection.X509Credentials is really a

1375

# generic GnuTLS certificate credentials object so long as

1376

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

1377

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1378

2144

1379

2145

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

1380

2146

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

1384

2150

priority = self.server.gnutls_priority

1385

2151

if priority is None:

1386

2152

priority = "NORMAL"

1387

(gnutls.library.functions

1388

.gnutls_priority_set_direct(session._c_object,

1389

priority, None))

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1390

2155

1391

2156

# Start communication using the Mandos protocol

1392

2157

# Get protocol number

1394

2159

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

1395

2160

try:

1396

2161

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

1397

raise RuntimeError

2162

raise RuntimeError(line)

1398

2163

except (ValueError, IndexError, RuntimeError) as error:

1399

2164

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

1400

2165

return

1402

2167

# Start GnuTLS connection

1403

2168

try:

1404

2169

session.handshake()

1405

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1406

2171

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

1407

2172

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

1408

2173

# established. Just abandon the request.

1412

2177

approval_required = False

1413

2178

try:

1414

2179

try:

1415

fpr = self.fingerprint(self.peer_certificate

1416

(session))

1417

except (TypeError,

1418

gnutls.errors.GNUTLSError) as error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1419

2183

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

1420

2184

return

1421

2185

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

1434

2198

while True:

1435

2199

if not client.enabled:

1436

2200

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

1437

client.name)

2201

client.name)

1438

2202

if self.server.use_dbus:

1439

2203

# Emit D-Bus signal

1440

2204

client.Rejected("Disabled")

1441

2205

return

1442

2206

1443

if client._approved or not client.approval_delay:

2207

if client.approved or not client.approval_delay:

1444

2208

#We are approved or approval is disabled

1445

2209

break

1446

elif client._approved is None:

2210

elif client.approved is None:

1447

2211

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

1448

2212

client.name)

1449

2213

if self.server.use_dbus:

1450

2214

# Emit D-Bus signal

1451

2215

client.NeedApproval(

1452

client.approval_delay_milliseconds(),

1453

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1454

2218

else:

1455

2219

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

1456

2220

client.name)

1462

2226

#wait until timeout or approved

1463

2227

time = datetime.datetime.now()

1464

2228

client.changedstate.acquire()

1465

(client.changedstate.wait

1466

(float(client._timedelta_to_milliseconds(delay)

1467

/ 1000)))

2229

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

1468

2230

client.changedstate.release()

1469

2231

time2 = datetime.datetime.now()

1470

2232

if (time2 - time) >= delay:

1481

2243

else:

1482

2244

delay -= time2 - time

1483

2245

1484

sent_size = 0

1485

while sent_size < len(client.secret):

1486

try:

1487

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

1488

except gnutls.errors.GNUTLSError as error:

1489

logger.warning("gnutls send failed")

1490

return

1491

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

1492

sent, len(client.secret)

1493

- (sent_size + sent))

1494

sent_size += sent

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

1495

2252

1496

2253

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

1497

2254

# bump the timeout using extended_timeout

1498

client.checked_ok(client.extended_timeout)

2255

client.bump_timeout(client.extended_timeout)

1499

2256

if self.server.use_dbus:

1500

2257

# Emit D-Bus signal

1501

2258

client.GotSecret()

1505

2262

client.approvals_pending -= 1

1506

2263

try:

1507

2264

session.bye()

1508

except gnutls.errors.GNUTLSError as error:

1509

logger.warning("GnuTLS bye failed")

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1510

2268

1511

2269

@staticmethod

1512

2270

def peer_certificate(session):

1513

2271

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

1514

2272

# If not an OpenPGP certificate...

1515

if (gnutls.library.functions

1516

.gnutls_certificate_type_get(session._c_object)

1517

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1518

# ...do the normal thing

1519

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1520

2277

list_size = ctypes.c_uint(1)

1521

cert_list = (gnutls.library.functions

1522

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1523

2279

(session._c_object, ctypes.byref(list_size)))

1524

2280

if not bool(cert_list) and list_size.value != 0:

1525

raise gnutls.errors.GNUTLSError("error getting peer"

1526

" certificate")

2281

raise gnutls.Error("error getting peer certificate")

1527

2282

if list_size.value == 0:

1528

2283

return None

1529

2284

cert = cert_list[0]

1533

2288

def fingerprint(openpgp):

1534

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1535

2290

# New GnuTLS "datum" with the OpenPGP public key

1536

datum = (gnutls.library.types

1537

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

1538

ctypes.POINTER

1539

(ctypes.c_ubyte)),

1540

ctypes.c_uint(len(openpgp))))

2291

datum = gnutls.datum_t(

2292

ctypes.cast(ctypes.c_char_p(openpgp),

2293

ctypes.POINTER(ctypes.c_ubyte)),

2294

ctypes.c_uint(len(openpgp)))

1541

2295

# New empty GnuTLS certificate

1542

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1543

(gnutls.library.functions

1544

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1545

2298

# Import the OpenPGP public key into the certificate

1546

(gnutls.library.functions

1547

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

1548

gnutls.library.constants

1549

.GNUTLS_OPENPGP_FMT_RAW))

2299

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2300

gnutls.OPENPGP_FMT_RAW)

1550

2301

# Verify the self signature in the key

1551

2302

crtverify = ctypes.c_uint()

1552

(gnutls.library.functions

1553

.gnutls_openpgp_crt_verify_self(crt, 0,

1554

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1555

2305

if crtverify.value != 0:

1556

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1557

raise (gnutls.errors.CertificateSecurityError

1558

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1559

2308

# New buffer for the fingerprint

1560

2309

buf = ctypes.create_string_buffer(20)

1561

2310

buf_len = ctypes.c_size_t()

1562

2311

# Get the fingerprint from the certificate into the buffer

1563

(gnutls.library.functions

1564

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

1565

ctypes.byref(buf_len)))

2312

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2313

ctypes.byref(buf_len))

1566

2314

# Deinit the certificate

1567

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1568

2316

# Convert the buffer to a Python bytestring

1569

2317

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

1570

2318

# Convert the bytestring to hexadecimal notation

1571

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

2319

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

1572

2320

return hex_fpr

1573

2321

1574

2322

1575

2323

class MultiprocessingMixIn(object):

1576

2324

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

2325

1577

2326

def sub_process_main(self, request, address):

1578

2327

try:

1579

2328

self.finish_request(request, address)

1580

except:

2329

except Exception:

1581

2330

self.handle_error(request, address)

1582

2331

self.close_request(request)

1583

2332

1584

2333

def process_request(self, request, address):

1585

2334

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

1586

2335

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

1587

args = (request,

1588

address))

2336

args = (request, address))

1589

2337

proc.start()

1590

2338

return proc

1591

2339

1592

2340

1593

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1594

2342

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

2343

1595

2344

def process_request(self, request, client_address):

1596

2345

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

1597

2346

1606

2355

1607

2356

def add_pipe(self, parent_pipe, proc):

1608

2357

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

1609

raise NotImplementedError

2358

raise NotImplementedError()

1610

2359

1611

2360

1612

2361

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1618

2367

interface: None or a network interface name (string)

1619

2368

use_ipv6: Boolean; to use IPv6 or not

1620

2369

"""

2370

1621

2371

def __init__(self, server_address, RequestHandlerClass,

1622

interface=None, use_ipv6=True):

2372

interface=None,

2373

use_ipv6=True,

2374

socketfd=None):

2375

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

2376

creating a new one with socket.socket().

2377

"""

1623

2378

self.interface = interface

1624

2379

if use_ipv6:

1625

2380

self.address_family = socket.AF_INET6

2381

if socketfd is not None:

2382

# Save the file descriptor

2383

self.socketfd = socketfd

2384

# Save the original socket.socket() function

2385

self.socket_socket = socket.socket

2386

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

2387

#

2388

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

2389

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

2390

# patching socket.socket.)

2391

#

2392

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

2393

@functools.wraps(socket.socket)

2394

def socket_wrapper(*args, **kwargs):

2395

# Restore original function so subsequent calls are

2396

# not affected.

2397

socket.socket = self.socket_socket

2398

del self.socket_socket

2399

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

2400

# saved file descriptor.

2401

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

2402

# Replace socket.socket() function with wrapper

2403

socket.socket = socket_wrapper

2404

# The socketserver.TCPServer.__init__ will call

2405

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

2406

# socket_wrapper(), if socketfd was set.

1626

2407

socketserver.TCPServer.__init__(self, server_address,

1627

2408

RequestHandlerClass)

2409

1628

2410

def server_bind(self):

1629

2411

"""This overrides the normal server_bind() function

1630

2412

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

1636

2418

self.interface)

1637

2419

else:

1638

2420

try:

1639

self.socket.setsockopt(socket.SOL_SOCKET,

1640

SO_BINDTODEVICE,

1641

str(self.interface

1642

+ '\0'))

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1643

2424

except socket.error as error:

1644

if error[0] == errno.EPERM:

1645

logger.error("No permission to"

1646

" bind to interface %s",

1647

self.interface)

1648

elif error[0] == errno.ENOPROTOOPT:

2425

if error.errno == errno.EPERM:

2426

logger.error("No permission to bind to"

2427

" interface %s", self.interface)

2428

elif error.errno == errno.ENOPROTOOPT:

1649

2429

logger.error("SO_BINDTODEVICE not available;"

1650

2430

" cannot bind to interface %s",

1651

2431

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

1652

2435

else:

1653

2436

raise

1654

2437

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

1657

2440

if self.address_family == socket.AF_INET6:

1658

2441

any_address = "::" # in6addr_any

1659

2442

else:

1660

any_address = socket.INADDR_ANY

2443

any_address = "0.0.0.0" # INADDR_ANY

1661

2444

self.server_address = (any_address,

1662

2445

self.server_address[1])

1663

2446

elif not self.server_address[1]:

1664

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

1665

0)

2447

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

1666

2448

# if self.interface:

1667

2449

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

1668

2450

# 0, # port

1682

2464

1683

2465

Assumes a gobject.MainLoop event loop.

1684

2466

"""

2467

1685

2468

def __init__(self, server_address, RequestHandlerClass,

1686

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

1687

gnutls_priority=None, use_dbus=True):

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

1688

2475

self.enabled = False

1689

2476

self.clients = clients

1690

2477

if self.clients is None:

1694

2481

IPv6_TCPServer.__init__(self, server_address,

1695

2482

RequestHandlerClass,

1696

2483

interface = interface,

1697

use_ipv6 = use_ipv6)

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1698

2487

def server_activate(self):

1699

2488

if self.enabled:

1700

2489

return socketserver.TCPServer.server_activate(self)

1704

2493

1705

2494

def add_pipe(self, parent_pipe, proc):

1706

2495

# Call "handle_ipc" for both data and EOF events

1707

gobject.io_add_watch(parent_pipe.fileno(),

1708

gobject.IO_IN | gobject.IO_HUP,

1709

functools.partial(self.handle_ipc,

1710

parent_pipe =

1711

parent_pipe,

1712

proc = proc))

2496

gobject.io_add_watch(

2497

parent_pipe.fileno(),

2498

gobject.IO_IN | gobject.IO_HUP,

2499

functools.partial(self.handle_ipc,

2500

parent_pipe = parent_pipe,

2501

proc = proc))

1713

2502

1714

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

1715

proc = None, client_object=None):

1716

condition_names = {

1717

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

1718

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

1719

# blocking).

1720

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

1721

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

1722

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

1723

# broken, usually for pipes and

1724

# sockets).

1725

}

1726

conditions_string = ' | '.join(name

1727

for cond, name in

1728

condition_names.iteritems()

1729

if cond & condition)

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

2506

client_object=None):

1730

2507

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

1731

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

2508

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

1732

2509

# Wait for other process to exit

1733

2510

proc.join()

1734

2511

return False

1755

2532

parent_pipe.send(False)

1756

2533

return False

1757

2534

1758

gobject.io_add_watch(parent_pipe.fileno(),

1759

gobject.IO_IN | gobject.IO_HUP,

1760

functools.partial(self.handle_ipc,

1761

parent_pipe =

1762

parent_pipe,

1763

proc = proc,

1764

client_object =

1765

client))

2535

gobject.io_add_watch(

2536

parent_pipe.fileno(),

2537

gobject.IO_IN | gobject.IO_HUP,

2538

functools.partial(self.handle_ipc,

2539

parent_pipe = parent_pipe,

2540

proc = proc,

2541

client_object = client))

1766

2542

parent_pipe.send(True)

1767

2543

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

1768

2544

# same fileno

1774

2550

1775

2551

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

1776

2552

funcname)(*args,

1777

**kwargs)))

2553

**kwargs)))

1778

2554

1779

2555

if command == 'getattr':

1780

2556

attrname = request[1]

1781

if callable(client_object.__getattribute__(attrname)):

1782

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1783

2560

else:

1784

parent_pipe.send(('data', client_object

1785

.__getattribute__(attrname)))

2561

parent_pipe.send((

2562

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

1786

2563

1787

2564

if command == 'setattr':

1788

2565

attrname = request[1]

1792

2569

return True

1793

2570

1794

2571

2572

def rfc3339_duration_to_delta(duration):

2573

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

2574

2575

>>> rfc3339_duration_to_delta("P7D")

2576

datetime.timedelta(7)

2577

>>> rfc3339_duration_to_delta("PT60S")

2578

datetime.timedelta(0, 60)

2579

>>> rfc3339_duration_to_delta("PT60M")

2580

datetime.timedelta(0, 3600)

2581

>>> rfc3339_duration_to_delta("PT24H")

2582

datetime.timedelta(1)

2583

>>> rfc3339_duration_to_delta("P1W")

2584

datetime.timedelta(7)

2585

>>> rfc3339_duration_to_delta("PT5M30S")

2586

datetime.timedelta(0, 330)

2587

>>> rfc3339_duration_to_delta("P1DT3M20S")

2588

datetime.timedelta(1, 200)

2589

"""

2590

2591

# Parsing an RFC 3339 duration with regular expressions is not

2592

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

2593

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

2594

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

2595

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

2596

# avoid excessive use of external libraries.

2597

2598

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

2599

Token = collections.namedtuple("Token", (

2600

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

2601

# a "group" containing digits

2602

"value", # datetime.timedelta or None

2603

"followers")) # Tokens valid after this token

2604

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

2605

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

2606

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

2607

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

2608

datetime.timedelta(seconds=1),

2609

frozenset((token_end, )))

2610

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

2611

datetime.timedelta(minutes=1),

2612

frozenset((token_second, token_end)))

2613

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

2614

datetime.timedelta(hours=1),

2615

frozenset((token_minute, token_end)))

2616

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

2617

None,

2618

frozenset((token_hour, token_minute,

2619

token_second)))

2620

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

2621

datetime.timedelta(days=1),

2622

frozenset((token_time, token_end)))

2623

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

2624

datetime.timedelta(weeks=4),

2625

frozenset((token_day, token_end)))

2626

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

2627

datetime.timedelta(weeks=52),

2628

frozenset((token_month, token_end)))

2629

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

2630

datetime.timedelta(weeks=1),

2631

frozenset((token_end, )))

2632

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

2633

frozenset((token_year, token_month,

2634

token_day, token_time,

2635

token_week)))

2636

# Define starting values

2637

value = datetime.timedelta() # Value so far

2638

found_token = None

2639

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

2640

s = duration # String left to parse

2641

# Loop until end token is found

2642

while found_token is not token_end:

2643

# Search for any currently valid tokens

2644

for token in followers:

2645

match = token.regexp.match(s)

2646

if match is not None:

2647

# Token found

2648

if token.value is not None:

2649

# Value found, parse digits

2650

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

2651

# Add to value so far

2652

value += factor * token.value

2653

# Strip token from string

2654

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

2655

# Go to found token

2656

found_token = token

2657

# Set valid next tokens

2658

followers = found_token.followers

2659

break

2660

else:

2661

# No currently valid tokens were found

2662

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

2663

.format(duration))

2664

# End token found

2665

return value

2666

2667

1795

2668

def string_to_delta(interval):

1796

2669

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

1797

2670

1808

2681

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

1809

2682

datetime.timedelta(0, 330)

1810

2683

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

1811

2690

timevalue = datetime.timedelta(0)

1812

2691

for s in interval.split():

1813

2692

try:

1814

suffix = unicode(s[-1])

2693

suffix = s[-1]

1815

2694

value = int(s[:-1])

1816

2695

if suffix == "d":

1817

2696

delta = datetime.timedelta(value)

1824

2703

elif suffix == "w":

1825

2704

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

1826

2705

else:

1827

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

1828

except (ValueError, IndexError) as e:

2706

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

2707

except IndexError as e:

1829

2708

raise ValueError(*(e.args))

1830

2709

timevalue += delta

1831

2710

return timevalue

1832

2711

1833

2712

1834

def if_nametoindex(interface):

1835

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

1836

1837

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

1838

global if_nametoindex

1839

try:

1840

if_nametoindex = (ctypes.cdll.LoadLibrary

1841

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

1842

.if_nametoindex)

1843

except (OSError, AttributeError):

1844

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

1845

def if_nametoindex(interface):

1846

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

1847

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

1848

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

1849

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1850

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

1851

interface))

1852

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

1853

ifreq[16:20])[0]

1854

return interface_index

1855

return if_nametoindex(interface)

1856

1857

1858

2713

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

1859

2714

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

1860

2715

1868

2723

sys.exit()

1869

2724

if not noclose:

1870

2725

# Close all standard open file descriptors

1871

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

2726

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

1872

2727

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

1873

2728

raise OSError(errno.ENODEV,

1874

"%s not a character device"

1875

% os.path.devnull)

2729

"{} not a character device"

2730

.format(os.devnull))

1876

2731

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

1877

2732

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

1878

2733

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

1887

2742

1888

2743

parser = argparse.ArgumentParser()

1889

2744

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

1890

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

2745

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

1891

2746

help="show version number and exit")

1892

2747

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

1893

2748

help="Bind to interface IF")

1899

2754

help="Run self-test")

1900

2755

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

1901

2756

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

1902

" to terminal")

2757

" to terminal", default=None)

1903

2758

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

1904

2759

help="Debug level for stdout output")

1905

2760

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

1912

2767

" files")

1913

2768

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

1914

2769

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

1915

" system bus interface")

2770

" system bus interface", default=None)

1916

2771

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

1917

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

2772

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

2773

default=None)

1918

2774

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

1919

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

1920

default=True)

1921

2775

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

2776

" state", default=None)

2777

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

2778

help="Specify a file descriptor to a network"

2779

" socket to use instead of creating one")

2780

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

2781

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

2782

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

2783

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

2784

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

2785

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

2786

default=None)

2787

1922

2788

options = parser.parse_args()

1923

2789

1924

2790

if options.check:

1925

2791

import doctest

1926

doctest.testmod()

1927

sys.exit()

2792

fail_count, test_count = doctest.testmod()

2793

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

1928

2794

1929

2795

# Default values for config file for server-global settings

1930

2796

server_defaults = { "interface": "",

1932

2798

"port": "",

1933

2799

"debug": "False",

1934

2800

"priority":

1935

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

2801

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

2802

":+SIGN-DSA-SHA256",

1936

2803

"servicename": "Mandos",

1937

2804

"use_dbus": "True",

1938

2805

"use_ipv6": "True",

1939

2806

"debuglevel": "",

1940

}

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1941

2813

1942

2814

# Parse config file for server-global settings

1943

2815

server_config = configparser.SafeConfigParser(server_defaults)

1944

2816

del server_defaults

1945

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

1946

"mandos.conf"))

2817

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

1947

2818

# Convert the SafeConfigParser object to a dict

1948

2819

server_settings = server_config.defaults()

1949

2820

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

1950

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

2821

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

1951

2822

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

1952

2823

option)

1953

2824

if server_settings["port"]:

1954

2825

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

1955

2826

"port")

2827

if server_settings["socket"]:

2828

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

2829

"socket")

2830

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

2831

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

2832

# happen with a supplied network socket.

2833

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

2834

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

2835

["socket"])

1956

2836

del server_config

1957

2837

1958

2838

# Override the settings from the config file with command line

1959

2839

# options, if set.

1960

2840

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

1961

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

1962

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

2841

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

2842

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

2843

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

1963

2844

value = getattr(options, option)

1964

2845

if value is not None:

1965

2846

server_settings[option] = value

1966

2847

del options

1967

2848

# Force all strings to be unicode

1968

2849

for option in server_settings.keys():

1969

if type(server_settings[option]) is str:

1970

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

2850

if isinstance(server_settings[option], bytes):

2851

server_settings[option] = (server_settings[option]

2852

.decode("utf-8"))

2853

# Force all boolean options to be boolean

2854

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

2855

"foreground", "zeroconf"):

2856

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

2857

# Debug implies foreground

2858

if server_settings["debug"]:

2859

server_settings["foreground"] = True

1971

2860

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

1972

2861

1973

2862

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

1974

2863

2864

if (not server_settings["zeroconf"]

2865

and not (server_settings["port"]

2866

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

2867

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

2868

1975

2869

# For convenience

1976

2870

debug = server_settings["debug"]

1977

2871

debuglevel = server_settings["debuglevel"]

1978

2872

use_dbus = server_settings["use_dbus"]

1979

2873

use_ipv6 = server_settings["use_ipv6"]

2874

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

2875

stored_state_file)

2876

foreground = server_settings["foreground"]

2877

zeroconf = server_settings["zeroconf"]

2878

2879

if debug:

2880

initlogger(debug, logging.DEBUG)

2881

else:

2882

if not debuglevel:

2883

initlogger(debug)

2884

else:

2885

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

2886

initlogger(debug, level)

1980

2887

1981

2888

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

1982

syslogger.setFormatter(logging.Formatter

1983

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

1984

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

1985

% server_settings["servicename"]))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1986

2893

1987

2894

# Parse config file with clients

1988

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

1989

"extended_timeout": "15m",

1990

"interval": "2m",

1991

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

1992

"host": "",

1993

"approval_delay": "0s",

1994

"approval_duration": "1s",

1995

}

1996

client_config = configparser.SafeConfigParser(client_defaults)

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

1997

2897

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

1998

2898

"clients.conf"))

1999

2899

2000

2900

global mandos_dbus_service

2001

2901

mandos_dbus_service = None

2002

2902

2003

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

2004

server_settings["port"]),

2005

ClientHandler,

2006

interface=(server_settings["interface"]

2007

or None),

2008

use_ipv6=use_ipv6,

2009

gnutls_priority=

2010

server_settings["priority"],

2011

use_dbus=use_dbus)

2012

if not debug:

2013

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

2903

socketfd = None

2904

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

2905

socketfd = server_settings["socket"]

2906

tcp_server = MandosServer(

2907

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

2908

ClientHandler,

2909

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

2910

use_ipv6=use_ipv6,

2911

gnutls_priority=server_settings["priority"],

2912

use_dbus=use_dbus,

2913

socketfd=socketfd)

2914

if not foreground:

2915

pidfilename = "/run/mandos.pid"

2916

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

2917

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

2918

pidfile = None

2014

2919

try:

2015

pidfile = open(pidfilename, "w")

2016

except IOError:

2017

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

2920

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

2921

except IOError as e:

2922

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

2923

exc_info=e)

2018

2924

2019

try:

2020

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

2021

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

2022

except KeyError:

2925

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

2023

2926

try:

2024

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

2025

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

2927

uid = pwd.getpwnam(name).pw_uid

2928

gid = pwd.getpwnam(name).pw_gid

2929

break

2026

2930

except KeyError:

2027

try:

2028

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

2029

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

2030

except KeyError:

2031

uid = 65534

2032

gid = 65534

2931

continue

2932

else:

2933

uid = 65534

2934

gid = 65534

2033

2935

try:

2034

2936

os.setgid(gid)

2035

2937

os.setuid(uid)

2036

2938

except OSError as error:

2037

if error[0] != errno.EPERM:

2038

raise error

2039

2040

if not debug and not debuglevel:

2041

syslogger.setLevel(logging.WARNING)

2042

console.setLevel(logging.WARNING)

2043

if debuglevel:

2044

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

2045

syslogger.setLevel(level)

2046

console.setLevel(level)

2939

if error.errno != errno.EPERM:

2940

raise

2047

2941

2048

2942

if debug:

2049

2943

# Enable all possible GnuTLS debugging

2050

2944

2051

2945

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

2052

2946

# - GnuTLS manual

2053

gnutls.library.functions.gnutls_global_set_log_level(11)

2947

gnutls.global_set_log_level(11)

2054

2948

2055

@gnutls.library.types.gnutls_log_func

2949

@gnutls.log_func

2056

2950

def debug_gnutls(level, string):

2057

2951

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

2058

2952

2059

(gnutls.library.functions

2060

.gnutls_global_set_log_function(debug_gnutls))

2953

gnutls.global_set_log_function(debug_gnutls)

2061

2954

2062

2955

# Redirect stdin so all checkers get /dev/null

2063

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

2956

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

2064

2957

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

2065

2958

if null > 2:

2066

2959

os.close(null)

2067

else:

2068

# No console logging

2069

logger.removeHandler(console)

2070

2960

2071

2961

# Need to fork before connecting to D-Bus

2072

if not debug:

2962

if not foreground:

2073

2963

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

2074

2964

daemon()

2075

2965

2966

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

2967

# need to inform gobject that threads will be used.

2968

gobject.threads_init()

2969

2076

2970

global main_loop

2077

2971

# From the Avahi example code

2078

DBusGMainLoop(set_as_default=True )

2972

DBusGMainLoop(set_as_default=True)

2079

2973

main_loop = gobject.MainLoop()

2080

2974

bus = dbus.SystemBus()

2081

2975

# End of Avahi example code

2082

2976

if use_dbus:

2083

2977

try:

2084

2978

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

2085

bus, do_not_queue=True)

2086

old_bus_name = (dbus.service.BusName

2087

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

2088

do_not_queue=True))

2089

except dbus.exceptions.NameExistsException as e:

2090

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

2979

bus,

2980

do_not_queue=True)

2981

old_bus_name = dbus.service.BusName(

2982

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

2983

do_not_queue=True)

2984

except dbus.exceptions.DBusException as e:

2985

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

2091

2986

use_dbus = False

2092

2987

server_settings["use_dbus"] = False

2093

2988

tcp_server.use_dbus = False

2094

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2095

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

2096

servicetype = "_mandos._tcp",

2097

protocol = protocol, bus = bus)

2098

if server_settings["interface"]:

2099

service.interface = (if_nametoindex

2100

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

2989

if zeroconf:

2990

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2991

service = AvahiServiceToSyslog(

2992

name = server_settings["servicename"],

2993

servicetype = "_mandos._tcp",

2994

protocol = protocol,

2995

bus = bus)

2996

if server_settings["interface"]:

2997

service.interface = if_nametoindex(

2998

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

2101

2999

2102

3000

global multiprocessing_manager

2103

3001

multiprocessing_manager = multiprocessing.Manager()

2104

3002

2105

3003

client_class = Client

2106

3004

if use_dbus:

2107

client_class = functools.partial(ClientDBusTransitional,

2108

bus = bus)

2109

2110

special_settings = {

2111

# Some settings need to be accessd by special methods;

2112

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

2113

"approved_by_default":

2114

lambda section:

2115

client_config.getboolean(section, "approved_by_default"),

2116

}

2117

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

2118

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

2119

# with exceptions for any special settings as defined above

2120

client_settings = dict((clientname,

2121

dict((setting,

2122

(value if setting not in special_settings

2123

else special_settings[setting](clientname)))

2124

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

2125

for clientname in client_config.sections())

2126

3005

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

3006

3007

client_settings = Client.config_parser(client_config)

2127

3008

old_client_settings = {}

2128

clients_data = []

2129

3009

clients_data = {}

3010

3011

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

3012

global wnull

3013

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

3014

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

3015

# mode

3016

if debug or not foreground:

3017

wnull.close()

3018

3019

# Get client data and settings from last running state.

2130

3020

if server_settings["restore"]:

2131

3021

try:

2132

3022

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

2133

clients_data, old_client_settings = pickle.load(stored_state)

3023

clients_data, old_client_settings = pickle.load(

3024

stored_state)

2134

3025

os.remove(stored_state_path)

2135

3026

except IOError as e:

2136

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

2137

if e.errno != errno.ENOENT:

3027

if e.errno == errno.ENOENT:

3028

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

3029

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

3030

else:

3031

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

3032

exc_info=e)

2138

3033

raise

2139

2140

for client in clients_data:

2141

client_name = client["name"]

2142

2143

# Decide which value to use after restoring saved state.

2144

# We have three different values: Old config file,

2145

# new config file, and saved state.

2146

# New config value takes precedence if it differs from old

2147

# config value, otherwise use saved state.

2148

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

3034

except EOFError as e:

3035

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

3036

"EOFError:",

3037

exc_info=e)

3038

3039

with PGPEngine() as pgp:

3040

for client_name, client in clients_data.items():

3041

# Skip removed clients

3042

if client_name not in client_settings:

3043

continue

3044

3045

# Decide which value to use after restoring saved state.

3046

# We have three different values: Old config file,

3047

# new config file, and saved state.

3048

# New config value takes precedence if it differs from old

3049

# config value, otherwise use saved state.

3050

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

3051

try:

3052

# For each value in new config, check if it

3053

# differs from the old config value (Except for

3054

# the "secret" attribute)

3055

if (name != "secret"

3056

and (value !=

3057

old_client_settings[client_name][name])):

3058

client[name] = value

3059

except KeyError:

3060

pass

3061

3062

# Clients who has passed its expire date can still be

3063

# enabled if its last checker was successful. A Client

3064

# whose checker succeeded before we stored its state is

3065

# assumed to have successfully run all checkers during

3066

# downtime.

3067

if client["enabled"]:

3068

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

3069

if not client["last_checked_ok"]:

3070

logger.warning(

3071

"disabling client {} - Client never "

3072

"performed a successful checker".format(

3073

client_name))

3074

client["enabled"] = False

3075

elif client["last_checker_status"] != 0:

3076

logger.warning(

3077

"disabling client {} - Client last"

3078

" checker failed with error code"

3079

" {}".format(

3080

client_name,

3081

client["last_checker_status"]))

3082

client["enabled"] = False

3083

else:

3084

client["expires"] = (

3085

datetime.datetime.utcnow()

3086

+ client["timeout"])

3087

logger.debug("Last checker succeeded,"

3088

" keeping {} enabled".format(

3089

client_name))

2149

3090

try:

2150

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

2151

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

2152

# attribute)

2153

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

2154

setattr(client, name, value)

2155

except KeyError:

2156

pass

2157

2158

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

2159

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

2160

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

2161

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

2162

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

2163

> client["interval"]):

2164

if client["last_checker_status"] != 0:

2165

client["enabled"] = False

2166

else:

2167

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

2168

2169

client["changedstate"] = (multiprocessing_manager

2170

.Condition(multiprocessing_manager

2171

.Lock()))

2172

if use_dbus:

2173

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2174

tcp_server.clients[client_name] = new_client

2175

new_client.bus = bus

2176

for name, value in client.iteritems():

2177

setattr(new_client, name, value)

2178

client_object_name = unicode(client_name).translate(

2179

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

2180

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

2181

new_client.dbus_object_path = (dbus.ObjectPath

2182

("/clients/" + client_object_name))

2183

DBusObjectWithProperties.__init__(new_client,

2184

new_client.bus,

2185

new_client.dbus_object_path)

2186

else:

2187

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

2188

for name, value in client.iteritems():

2189

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

2190

2191

tcp_server.clients[client_name].decrypt_secret(

2192

client_settings[client_name]["secret"])

2193

2194

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

2195

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

2196

del tcp_server.clients[clientname]

2197

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

2198

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

2199

config =

2200

client_settings

2201

[clientname]))

2202

2203

3091

client["secret"] = pgp.decrypt(

3092

client["encrypted_secret"],

3093

client_settings[client_name]["secret"])

3094

except PGPError:

3095

# If decryption fails, we use secret from new settings

3096

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

3097

client_name))

3098

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

3099

["secret"])

3100

3101

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

3102

for client_name in (set(old_client_settings)

3103

- set(client_settings)):

3104

del clients_data[client_name]

3105

for client_name in (set(client_settings)

3106

- set(old_client_settings)):

3107

clients_data[client_name] = client_settings[client_name]

3108

3109

# Create all client objects

3110

for client_name, client in clients_data.items():

3111

tcp_server.clients[client_name] = client_class(

3112

name = client_name,

3113

settings = client,

3114

server_settings = server_settings)

3115

2204

3116

if not tcp_server.clients:

2205

3117

logger.warning("No clients defined")

2206

2207

if not debug:

2208

try:

2209

with pidfile:

2210

pid = os.getpid()

2211

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

2212

del pidfile

2213

except IOError:

2214

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

2215

pidfilename, pid)

2216

except NameError:

2217

# "pidfile" was never created

2218

pass

3118

3119

if not foreground:

3120

if pidfile is not None:

3121

pid = os.getpid()

3122

try:

3123

with pidfile:

3124

print(pid, file=pidfile)

3125

except IOError:

3126

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

3127

pidfilename, pid)

3128

del pidfile

2219

3129

del pidfilename

2220

2221

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

2222

3130

2223

3131

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

2224

3132

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

2225

3133

2226

3134

if use_dbus:

2227

class MandosDBusService(dbus.service.Object):

3135

3136

@alternate_dbus_interfaces(

3137

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

3138

class MandosDBusService(DBusObjectWithObjectManager):

2228

3139

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

3140

2229

3141

def __init__(self):

2230

3142

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

3143

2231

3144

_interface = "se.recompile.Mandos"

2232

3145

2233

3146

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

2240

3153

"D-Bus signal"

2241

3154

pass

2242

3155

3156

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

3157

"true"})

2243

3158

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

2244

3159

def ClientRemoved(self, objpath, name):

2245

3160

"D-Bus signal"

2246

3161

pass

2247

3162

3163

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

3164

"true"})

2248

3165

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

2249

3166

def GetAllClients(self):

2250

3167

"D-Bus method"

2251

return dbus.Array(c.dbus_object_path

2252

for c in

3168

return dbus.Array(c.dbus_object_path for c in

2253

3169

tcp_server.clients.itervalues())

2254

3170

3171

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

3172

"true"})

2255

3173

@dbus.service.method(_interface,

2256

3174

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

2257

3175

def GetAllClientsWithProperties(self):

2258

3176

"D-Bus method"

2259

3177

return dbus.Dictionary(

2260

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

2261

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

3178

{ c.dbus_object_path: c.GetAll(

3179

"se.recompile.Mandos.Client")

3180

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

2262

3181

signature="oa{sv}")

2263

3182

2264

3183

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

2268

3187

if c.dbus_object_path == object_path:

2269

3188

del tcp_server.clients[c.name]

2270

3189

c.remove_from_connection()

2271

# Don't signal anything except ClientRemoved

3190

# Don't signal the disabling

2272

3191

c.disable(quiet=True)

2273

# Emit D-Bus signal

2274

self.ClientRemoved(object_path, c.name)

3192

# Emit D-Bus signal for removal

3193

self.client_removed_signal(c)

2275

3194

return

2276

3195

raise KeyError(object_path)

2277

3196

2278

3197

del _interface

3198

3199

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3200

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

3201

def GetManagedObjects(self):

3202

"""D-Bus method"""

3203

return dbus.Dictionary(

3204

{ client.dbus_object_path:

3205

dbus.Dictionary(

3206

{ interface: client.GetAll(interface)

3207

for interface in

3208

client._get_all_interface_names()})

3209

for client in tcp_server.clients.values()})

3210

3211

def client_added_signal(self, client):

3212

"""Send the new standard signal and the old signal"""

3213

if use_dbus:

3214

# New standard signal

3215

self.InterfacesAdded(

3216

client.dbus_object_path,

3217

dbus.Dictionary(

3218

{ interface: client.GetAll(interface)

3219

for interface in

3220

client._get_all_interface_names()}))

3221

# Old signal

3222

self.ClientAdded(client.dbus_object_path)

3223

3224

def client_removed_signal(self, client):

3225

"""Send the new standard signal and the old signal"""

3226

if use_dbus:

3227

# New standard signal

3228

self.InterfacesRemoved(

3229

client.dbus_object_path,

3230

client._get_all_interface_names())

3231

# Old signal

3232

self.ClientRemoved(client.dbus_object_path,

3233

client.name)

2279

3234

2280

class MandosDBusServiceTransitional(MandosDBusService):

2281

__metaclass__ = AlternateDBusNamesMetaclass

2282

mandos_dbus_service = MandosDBusServiceTransitional()

3235

mandos_dbus_service = MandosDBusService()

2283

3236

2284

3237

def cleanup():

2285

3238

"Cleanup function; run on exit"

2286

service.cleanup()

3239

if zeroconf:

3240

service.cleanup()

2287

3241

2288

3242

multiprocessing.active_children()

3243

wnull.close()

2289

3244

if not (tcp_server.clients or client_settings):

2290

3245

return

2291

2292

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

2293

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

2294

# secret will thus be unrecovable.

2295

clients = []

2296

for client in tcp_server.clients.itervalues():

2297

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

2298

2299

client_dict = {}

2300

2301

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

2302

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

2303

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

2304

exclude.add(name)

2305

2306

client_dict["encrypted_secret"] = client.encrypted_secret

2307

for attr in client.client_structure:

2308

if attr not in exclude:

2309

client_dict[attr] = getattr(client, attr)

2310

2311

clients.append(client_dict)

2312

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

2313

3246

3247

# Store client before exiting. Secrets are encrypted with key

3248

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

3249

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

3250

clients = {}

3251

with PGPEngine() as pgp:

3252

for client in tcp_server.clients.itervalues():

3253

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

3254

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

3255

key)

3256

client_dict = {}

3257

3258

# A list of attributes that can not be pickled

3259

# + secret.

3260

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

3261

"checker", "server_settings" }

3262

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

3263

.Object):

3264

exclude.add(name)

3265

3266

client_dict["encrypted_secret"] = (client

3267

.encrypted_secret)

3268

for attr in client.client_structure:

3269

if attr not in exclude:

3270

client_dict[attr] = getattr(client, attr)

3271

3272

clients[client.name] = client_dict

3273

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

3274

2314

3275

try:

2315

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

3276

with tempfile.NamedTemporaryFile(

3277

mode='wb',

3278

suffix=".pickle",

3279

prefix='clients-',

3280

dir=os.path.dirname(stored_state_path),

3281

delete=False) as stored_state:

2316

3282

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

2317

except IOError as e:

2318

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

2319

if e.errno != errno.ENOENT:

3283

tempname = stored_state.name

3284

os.rename(tempname, stored_state_path)

3285

except (IOError, OSError) as e:

3286

if not debug:

3287

try:

3288

os.remove(tempname)

3289

except NameError:

3290

pass

3291

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

3292

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

3293

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

3294

else:

3295

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

3296

exc_info=e)

2320

3297

raise

2321

3298

2322

3299

# Delete all clients, and settings from config

2323

3300

while tcp_server.clients:

2324

3301

name, client = tcp_server.clients.popitem()

2325

3302

if use_dbus:

2326

3303

client.remove_from_connection()

2327

# Don't signal anything except ClientRemoved

3304

# Don't signal the disabling

2328

3305

client.disable(quiet=True)

3306

# Emit D-Bus signal for removal

2329

3307

if use_dbus:

2330

# Emit D-Bus signal

2331

mandos_dbus_service.ClientRemoved(client

2332

.dbus_object_path,

2333

client.name)

3308

mandos_dbus_service.client_removed_signal(client)

2334

3309

client_settings.clear()

2335

3310

2336

3311

atexit.register(cleanup)

2337

3312

2338

3313

for client in tcp_server.clients.itervalues():

2339

3314

if use_dbus:

2340

# Emit D-Bus signal

2341

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3315

# Emit D-Bus signal for adding

3316

mandos_dbus_service.client_added_signal(client)

2342

3317

# Need to initiate checking of clients

2343

3318

if client.enabled:

2344

3319

client.init_checker()

2345

2346

3320

2347

3321

tcp_server.enable()

2348

3322

tcp_server.server_activate()

2349

3323

2350

3324

# Find out what port we got

2351

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

3325

if zeroconf:

3326

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

2352

3327

if use_ipv6:

2353

3328

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

2354

" flowinfo %d, scope_id %d"

2355

% tcp_server.socket.getsockname())

3329

" flowinfo %d, scope_id %d",

3330

*tcp_server.socket.getsockname())

2356

3331

else: # IPv4

2357

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

2358

% tcp_server.socket.getsockname())

3332

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

3333

*tcp_server.socket.getsockname())

2359

3334

2360

3335

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

2361

3336

2362

3337

try:

2363

# From the Avahi example code

2364

try:

2365

service.activate()

2366

except dbus.exceptions.DBusException as error:

2367

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

2368

cleanup()

2369

sys.exit(1)

2370

# End of Avahi example code

3338

if zeroconf:

3339

# From the Avahi example code

3340

try:

3341

service.activate()

3342

except dbus.exceptions.DBusException as error:

3343

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

3344

cleanup()

3345

sys.exit(1)

3346

# End of Avahi example code

2371

3347

2372

3348

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

2373

3349

lambda *args, **kwargs:

2377

3353

logger.debug("Starting main loop")

2378

3354

main_loop.run()

2379

3355

except AvahiError as error:

2380

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

3356

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

2381

3357

cleanup()

2382

3358

sys.exit(1)

2383

3359

except KeyboardInterrupt: