/mandos/trunk : revision 822

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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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from gi.repository import GObject

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except ImportError:

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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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if sys.version_info.major == 2:

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str = unicode

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version = "1.4.1"

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

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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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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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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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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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

327

self.cleanup()

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os._exit(1)

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def remove(self):

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331

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

182

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

211

363

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

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369

self.rename()

218

370

elif state == avahi.ENTRY_GROUP_FAILURE:

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371

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

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unicode(error))

221

raise AvahiGroupError("State changed: %s"

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% unicode(error))

372

str(error))

373

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

374

223

375

def cleanup(self):

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376

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

225

377

if self.group is not None:

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378

try:

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379

self.group.Free()

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380

except (dbus.exceptions.UnknownMethodException,

229

dbus.exceptions.DBusException) as e:

381

dbus.exceptions.DBusException):

230

382

pass

231

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self.group = None

232

384

self.remove()

385

233

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

234

387

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

235

388

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

236

bad_states = { avahi.SERVER_INVALID:

237

"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

241

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",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

243

395

if state in bad_states:

244

396

if bad_states[state] is not None:

245

397

if error is None:

248

400

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

249

401

self.cleanup()

250

402

elif state == avahi.SERVER_RUNNING:

251

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)

252

415

else:

253

416

if error is None:

254

417

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

255

418

else:

256

419

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

420

257

421

def activate(self):

258

422

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

259

423

if self.server is None:

263

427

follow_name_owner_changes=True),

264

428

avahi.DBUS_INTERFACE_SERVER)

265

429

self.server.connect_to_signal("StateChanged",

266

self.server_state_changed)

430

self.server_state_changed)

267

431

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

268

432

433

269

434

class AvahiServiceToSyslog(AvahiService):

270

def rename(self):

435

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

271

436

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

272

ret = AvahiService.rename(self)

273

syslogger.setFormatter(logging.Formatter

274

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

275

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

276

% self.name))

437

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

438

syslogger.setFormatter(logging.Formatter(

439

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

440

.format(self.name)))

277

441

return ret

278

442

279

def _timedelta_to_milliseconds(td):

280

"Convert a datetime.timedelta() to milliseconds"

281

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

282

+ (td.seconds * 1000)

283

+ (td.microseconds // 1000))

284

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

285

708

class Client(object):

286

709

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

287

710

288

711

Attributes:

289

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

712

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

290

713

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

291

714

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

292

715

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

293

716

to see if the client lives.

294

717

'None' if no process is running.

295

checker_callback_tag: a gobject event source tag, or None

718

checker_callback_tag: a GObject event source tag, or None

296

719

checker_command: string; External command which is run to check

297

720

if client lives. %() expansions are done at

298

721

runtime with vars(self) as dict, so that for

299

722

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

300

checker_initiator_tag: a gobject event source tag, or None

723

checker_initiator_tag: a GObject event source tag, or None

301

724

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

302

725

client_structure: Object describing what attributes a client has

303

726

and is used for storing the client at exit

304

727

current_checker_command: string; current running checker_command

305

disable_initiator_tag: a gobject event source tag, or None

728

disable_initiator_tag: a GObject event source tag, or None

306

729

enabled: bool()

307

730

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

308

731

uniquely identify the client

310

733

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

311

734

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

312

735

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

313

last_checker_status: integer between 0 and 255 reflecting exit status

314

of last checker. -1 reflect crashed checker,

315

or None.

316

last_enabled: datetime.datetime(); (UTC)

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

317

742

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

318

743

D-Bus identifiers

319

744

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

320

745

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

321

746

until this client is disabled

322

extended_timeout: extra long timeout when password has been sent

747

extended_timeout: extra long timeout when secret has been sent

323

748

runtime_expansions: Allowed attributes for runtime expansion.

324

749

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

325

750

disabled, or None

751

server_settings: The server_settings dict from main()

326

752

"""

327

753

328

754

runtime_expansions = ("approval_delay", "approval_duration",

329

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

330

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

755

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

756

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

757

"last_approval_request", "last_checked_ok",

331

758

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

332

333

def timeout_milliseconds(self):

334

"Return the 'timeout' attribute in milliseconds"

335

return _timedelta_to_milliseconds(self.timeout)

336

337

def extended_timeout_milliseconds(self):

338

"Return the 'extended_timeout' attribute in milliseconds"

339

return _timedelta_to_milliseconds(self.extended_timeout)

340

341

def interval_milliseconds(self):

342

"Return the 'interval' attribute in milliseconds"

343

return _timedelta_to_milliseconds(self.interval)

344

345

def approval_delay_milliseconds(self):

346

return _timedelta_to_milliseconds(self.approval_delay)

347

348

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

349

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

350

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

351

attribute."""

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):

352

822

self.name = name

353

if config is None:

354

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

355

840

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

356

# Uppercase and remove spaces from fingerprint for later

357

# comparison purposes with return value from the fingerprint()

358

# function

359

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

360

.replace(" ", ""))

361

841

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

362

if "secret" in config:

363

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

364

elif "secfile" in config:

365

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

366

(config["secfile"])),

367

"rb") as secfile:

368

self.secret = secfile.read()

369

else:

370

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

371

% self.name)

372

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

373

self.created = datetime.datetime.utcnow()

374

self.enabled = True

375

self.last_approval_request = None

376

self.last_enabled = datetime.datetime.utcnow()

377

self.last_checked_ok = None

378

self.last_checker_status = None

379

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

380

self.extended_timeout = string_to_delta(config

381

["extended_timeout"])

382

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

842

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

843

datetime.datetime.utcnow())

844

845

# attributes specific for this server instance

383

846

self.checker = None

384

847

self.checker_initiator_tag = None

385

848

self.disable_initiator_tag = None

386

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

387

849

self.checker_callback_tag = None

388

self.checker_command = config["checker"]

389

850

self.current_checker_command = None

390

self._approved = None

391

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

392

True)

851

self.approved = None

393

852

self.approvals_pending = 0

394

self.approval_delay = string_to_delta(

395

config["approval_delay"])

396

self.approval_duration = string_to_delta(

397

config["approval_duration"])

398

self.changedstate = (multiprocessing_manager

399

.Condition(multiprocessing_manager

400

.Lock()))

401

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

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("_")]

402

858

self.client_structure.append("client_structure")

403

404

405

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

406

lambda obj: isinstance(obj, property)):

859

860

for name, t in inspect.getmembers(

861

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

407

862

if not name.startswith("_"):

408

863

self.client_structure.append(name)

409

864

417

872

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

418

873

# Already enabled

419

874

return

420

self.send_changedstate()

421

875

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

422

876

self.enabled = True

423

877

self.last_enabled = datetime.datetime.utcnow()

424

878

self.init_checker()

879

self.send_changedstate()

425

880

426

881

def disable(self, quiet=True):

427

882

"""Disable this client."""

428

883

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

429

884

return False

430

885

if not quiet:

431

self.send_changedstate()

432

if not quiet:

433

886

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

434

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

435

gobject.source_remove(self.disable_initiator_tag)

887

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

888

GObject.source_remove(self.disable_initiator_tag)

436

889

self.disable_initiator_tag = None

437

890

self.expires = None

438

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

439

gobject.source_remove(self.checker_initiator_tag)

891

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

892

GObject.source_remove(self.checker_initiator_tag)

440

893

self.checker_initiator_tag = None

441

894

self.stop_checker()

442

895

self.enabled = False

443

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

896

if not quiet:

897

self.send_changedstate()

898

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

444

899

return False

445

900

446

901

def __del__(self):

447

902

self.disable()

448

903

449

904

def init_checker(self):

450

905

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

451

906

# and every interval from then on.

452

self.checker_initiator_tag = (gobject.timeout_add

453

(self.interval_milliseconds(),

454

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)

455

912

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

456

self.disable_initiator_tag = (gobject.timeout_add

457

(self.timeout_milliseconds(),

458

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)

459

917

# Also start a new checker *right now*.

460

918

self.start_checker()

461

462

463

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

919

920

def checker_callback(self, source, condition, connection,

921

command):

464

922

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

465

923

self.checker_callback_tag = None

466

924

self.checker = None

467

if os.WIFEXITED(condition):

468

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

469

932

if self.last_checker_status == 0:

470

933

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

471

934

vars(self))

472

935

self.checked_ok()

473

936

else:

474

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

475

vars(self))

937

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

476

938

else:

477

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

478

941

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

479

942

vars(self))

480

481

def checked_ok(self, timeout=None):

482

"""Bump up the timeout for this client.

483

484

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

485

alive and well.

486

"""

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."""

487

954

if timeout is None:

488

955

timeout = self.timeout

489

self.last_checked_ok = datetime.datetime.utcnow()

490

956

if self.disable_initiator_tag is not None:

491

gobject.source_remove(self.disable_initiator_tag)

957

GObject.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = None

492

959

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

493

self.disable_initiator_tag = (gobject.timeout_add

494

(_timedelta_to_milliseconds

495

(timeout), self.disable))

960

self.disable_initiator_tag = GObject.timeout_add(

961

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

496

962

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

497

963

498

964

def need_approval(self):

504

970

If a checker already exists, leave it running and do

505

971

nothing."""

506

972

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

507

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

508

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

509

# client would inevitably timeout, since no checker would get

510

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

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

511

977

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

512

978

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

513

979

# should be.

514

980

515

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

516

try:

517

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

518

except (AttributeError, OSError) as error:

519

if (isinstance(error, OSError)

520

and error.errno != errno.ECHILD):

521

raise error

522

else:

523

if pid:

524

logger.warning("Checker was a zombie")

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status,

527

self.current_checker_command)

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

528

985

# Start a new checker if needed

529

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 }

530

991

try:

531

# In case checker_command has exactly one % operator

532

command = self.checker_command % self.host

533

except TypeError:

534

# Escape attributes for the shell

535

escaped_attrs = dict(

536

(attr,

537

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

538

errors=

539

'replace')))

540

for attr in

541

self.runtime_expansions)

542

543

try:

544

command = self.checker_command % escaped_attrs

545

except TypeError as error:

546

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

547

' %s', self.checker_command, error)

548

return True # Try again later

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

549

998

self.current_checker_command = command

550

try:

551

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

552

command, self.name)

553

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

554

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

555

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

556

# always replaced by /dev/null.)

557

self.checker = subprocess.Popen(command,

558

close_fds=True,

559

shell=True, cwd="/")

560

self.checker_callback_tag = (gobject.child_watch_add

561

(self.checker.pid,

562

self.checker_callback,

563

data=command))

564

# The checker may have completed before the gobject

565

# watch was added. Check for this.

566

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

567

if pid:

568

gobject.source_remove(self.checker_callback_tag)

569

self.checker_callback(pid, status, command)

570

except OSError as error:

571

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

572

error)

573

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

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)

1024

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

574

1025

return True

575

1026

576

1027

def stop_checker(self):

577

1028

"""Force the checker process, if any, to stop."""

578

1029

if self.checker_callback_tag:

579

gobject.source_remove(self.checker_callback_tag)

1030

GObject.source_remove(self.checker_callback_tag)

580

1031

self.checker_callback_tag = None

581

1032

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

582

1033

return

583

1034

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

584

try:

585

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

586

#time.sleep(0.5)

587

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

588

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

589

except OSError as error:

590

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

591

raise

1035

self.checker.terminate()

592

1036

self.checker = None

593

1037

594

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

595

def encrypt_secret(self, key):

596

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

597

hasheng = hashlib.sha256()

598

hasheng.update(key)

599

encryptionkey = hasheng.digest()

600

601

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

602

hasheng = hashlib.sha256()

603

hasheng.update(self.secret)

604

validationhash = hasheng.digest()

605

606

# Encrypt secret

607

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

608

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

609

Crypto.Cipher.AES.MODE_CFB, iv)

610

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

611

self.encrypted_secret = (ciphertext, iv)

612

613

# Decrypt a encrypted client secret

614

def decrypt_secret(self, key):

615

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

616

hasheng = hashlib.sha256()

617

hasheng.update(key)

618

encryptionkey = hasheng.digest()

619

620

# Decrypt encrypted secret

621

ciphertext, iv = self.encrypted_secret

622

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

623

Crypto.Cipher.AES.MODE_CFB, iv)

624

plain = ciphereng.decrypt(ciphertext)

625

626

# Validate decrypted secret to know if it was succesful

627

hasheng = hashlib.sha256()

628

validationhash = plain[:hasheng.digest_size]

629

secret = plain[hasheng.digest_size:]

630

hasheng.update(secret)

631

632

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

633

# the decrypted secret

634

if hasheng.digest() == validationhash:

635

self.secret = secret

636

else:

637

self.secret = key

638

del self.encrypted_secret

639

640

641

def dbus_service_property(dbus_interface, signature="v",

642

access="readwrite", byte_arrays=False):

1038

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

643

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

644

1044

become properties on the D-Bus.

645

1045

654

1054

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

655

1055

if byte_arrays and signature != "ay":

656

1056

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

657

" signature %r" % signature)

1057

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

1058

658

1059

def decorator(func):

659

1060

func._dbus_is_property = True

660

1061

func._dbus_interface = dbus_interface

665

1066

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

666

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

667

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

668

1113

return decorator

669

1114

670

1115

671

1116

class DBusPropertyException(dbus.exceptions.DBusException):

672

1117

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

673

1118

"""

674

def __unicode__(self):

675

return unicode(str(self))

1119

pass

676

1120

677

1121

678

1122

class DBusPropertyAccessException(DBusPropertyException):

687

1131

pass

688

1132

689

1133

690

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):

691

1224

"""A D-Bus object with properties.

692

1225

693

1226

Classes inheriting from this can use the dbus_service_property

695

1228

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

696

1229

"""

697

1230

698

@staticmethod

699

def _is_dbus_property(obj):

700

return getattr(obj, "_dbus_is_property", False)

701

702

def _get_all_dbus_properties(self):

703

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

704

"""

705

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

706

for cls in self.__class__.__mro__

707

for name, prop in

708

inspect.getmembers(cls, self._is_dbus_property))

709

710

1231

def _get_dbus_property(self, interface_name, property_name):

711

1232

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

712

1233

property with the specified name and interface.

713

1234

"""

714

for cls in self.__class__.__mro__:

715

for name, value in (inspect.getmembers

716

(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")):

717

1238

if (value._dbus_name == property_name

718

1239

and value._dbus_interface == interface_name):

719

1240

return value.__get__(self)

720

1241

721

1242

# No such property

722

raise DBusPropertyNotFound(self.dbus_object_path + ":"

723

+ interface_name + "."

724

+ property_name)

725

726

@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",

727

1257

out_signature="v")

728

1258

def Get(self, interface_name, property_name):

729

1259

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

747

1277

# The byte_arrays option is not supported yet on

748

1278

# signatures other than "ay".

749

1279

if prop._dbus_signature != "ay":

750

raise ValueError

751

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

752

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))

753

1285

prop(value)

754

1286

755

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

756

1289

out_signature="a{sv}")

757

1290

def GetAll(self, interface_name):

758

1291

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

760

1293

761

1294

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

762

1295

"""

763

all = {}

764

for name, prop in self._get_all_dbus_properties():

1296

properties = {}

1297

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

765

1298

if (interface_name

766

1299

and interface_name != prop._dbus_interface):

767

1300

# Interface non-empty but did not match

771

1304

continue

772

1305

value = prop()

773

1306

if not hasattr(value, "variant_level"):

774

all[name] = value

1307

properties[name] = value

775

1308

continue

776

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

777

value.variant_level+1)

778

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

779

1320

780

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

781

1322

out_signature="s",

782

1323

path_keyword='object_path',

783

1324

connection_keyword='connection')

784

1325

def Introspect(self, object_path, connection):

785

"""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.

786

1329

"""

787

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

788

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

789

1333

try:

790

1334

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

1335

791

1336

def make_tag(document, name, prop):

792

1337

e = document.createElement("property")

793

1338

e.setAttribute("name", name)

794

1339

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

795

1340

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

796

1341

return e

1342

797

1343

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

1344

# Add property tags

798

1345

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

799

1346

for name, prop

800

in self._get_all_dbus_properties()

1347

in self._get_all_dbus_things("property")

801

1348

if prop._dbus_interface

802

1349

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

803

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)

804

1367

# Add the names to the return values for the

805

1368

# "org.freedesktop.DBus.Properties" methods

806

1369

if (if_tag.getAttribute("name")

821

1384

except (AttributeError, xml.dom.DOMException,

822

1385

xml.parsers.expat.ExpatError) as error:

823

1386

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

824

error)

825

return xmlstring

826

827

828

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):

829

1460

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

830

1461

if dt is None:

831

1462

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

832

return dbus.String(dt.isoformat(),

833

variant_level=variant_level)

834

835

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

836

.__metaclass__):

837

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

838

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

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).

839

1488

"""

840

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

841

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

842

# methods, signals, or properties in them

843

for base in (b for b in bases

844

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

845

# Go though all attributes of the base class

846

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

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):

847

1497

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

848

1498

# with the wrong interface name

849

1499

if (not hasattr(attribute, "_dbus_interface")

850

or not attribute._dbus_interface

851

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

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

852

1502

continue

853

1503

# Create an alternate D-Bus interface name based on

854

1504

# the current name

855

alt_interface = (attribute._dbus_interface

856

.replace("se.recompile.Mandos",

857

"se.bsnet.fukt.Mandos"))

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1507

interface_names.add(alt_interface)

858

1508

# Is this a D-Bus signal?

859

1509

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

860

# Extract the original non-method function by

861

# black magic

862

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(

863

1514

zip(attribute.func_code.co_freevars,

864

attribute.__closure__))["func"]

865

.cell_contents)

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

866

1519

# Create a new, but exactly alike, function

867

1520

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

868

1521

# with the alternate D-Bus interface name

869

new_function = (dbus.service.signal

870

(alt_interface,

871

attribute._dbus_signature)

872

(types.FunctionType(

873

nonmethod_func.func_code,

874

nonmethod_func.func_globals,

875

nonmethod_func.func_name,

876

nonmethod_func.func_defaults,

877

nonmethod_func.func_closure)))

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

878

1545

# Define a creator of a function to call both the

879

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

880

# 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

881

1549

def fixscope(func1, func2):

882

1550

"""This function is a scope container to pass

883

1551

func1 and func2 to the "call_both" function

884

1552

outside of its arguments"""

1553

1554

@functools.wraps(func2)

885

1555

def call_both(*args, **kwargs):

886

1556

"""This function will emit two D-Bus

887

1557

signals by calling func1 and func2"""

888

1558

func1(*args, **kwargs)

889

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

890

1565

return call_both

891

1566

# Create the "call_both" function and add it to

892

1567

# the class

893

attr[attrname] = fixscope(attribute,

894

new_function)

1568

attr[attrname] = fixscope(attribute, new_function)

895

1569

# Is this a D-Bus method?

896

1570

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

897

1571

# Create a new, but exactly alike, function

898

1572

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

899

1573

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

900

1574

# to the class.

901

attr[attrname] = (dbus.service.method

902

(alt_interface,

903

attribute._dbus_in_signature,

904

attribute._dbus_out_signature)

905

(types.FunctionType

906

(attribute.func_code,

907

attribute.func_globals,

908

attribute.func_name,

909

attribute.func_defaults,

910

attribute.func_closure)))

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

911

1591

# Is this a D-Bus property?

912

1592

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

913

1593

# Create a new, but exactly alike, function

914

1594

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

915

1595

# property with the alternate D-Bus interface

916

1596

# name. Add it to the class.

917

attr[attrname] = (dbus_service_property

918

(alt_interface,

919

attribute._dbus_signature,

920

attribute._dbus_access,

921

attribute

922

._dbus_get_args_options

923

["byte_arrays"])

924

(types.FunctionType

925

(attribute.func_code,

926

attribute.func_globals,

927

attribute.func_name,

928

attribute.func_defaults,

929

attribute.func_closure)))

930

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

931

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"})

932

1654

class ClientDBus(Client, DBusObjectWithProperties):

933

1655

"""A Client class using D-Bus

934

1656

938

1660

"""

939

1661

940

1662

runtime_expansions = (Client.runtime_expansions

941

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

942

1666

943

1667

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

944

1668

945

1669

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

946

1670

self.bus = bus

947

1671

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

948

949

self._approvals_pending = 0

950

1672

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

951

1673

# the D-Bus

952

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

953

1675

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

954

1676

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

955

self.dbus_object_path = (dbus.ObjectPath

956

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

957

1679

DBusObjectWithProperties.__init__(self, self.bus,

958

1680

self.dbus_object_path)

959

960

def notifychangeproperty(transform_func,

961

dbus_name, type_func=lambda x: x,

962

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):

963

1687

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

964

1688

its changes to DBus.

965

1689

966

1690

transform_fun: Function that takes a value and a variant_level

967

1691

and transforms it to a D-Bus type.

968

1692

dbus_name: D-Bus name of the variable

970

1694

to the D-Bus. Default: no transform

971

1695

variant_level: D-Bus variant level. Default: 1

972

1696

"""

973

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

1697

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

1698

974

1699

def setter(self, value):

975

1700

if hasattr(self, "dbus_object_path"):

976

1701

if (not hasattr(self, attrname) or

977

1702

type_func(getattr(self, attrname, None))

978

1703

!= type_func(value)):

979

dbus_value = transform_func(type_func(value),

980

variant_level

981

=variant_level)

982

self.PropertyChanged(dbus.String(dbus_name),

983

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())

984

1719

setattr(self, attrname, value)

985

1720

986

1721

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

987

1722

988

989

1723

expires = notifychangeproperty(datetime_to_dbus, "Expires")

990

1724

approvals_pending = notifychangeproperty(dbus.Boolean,

991

1725

"ApprovalPending",

993

1727

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

994

1728

last_enabled = notifychangeproperty(datetime_to_dbus,

995

1729

"LastEnabled")

996

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

997

type_func = lambda checker:

998

checker is not None)

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

999

1733

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1000

1734

"LastCheckedOK")

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1736

"LastCheckerStatus")

1001

1737

last_approval_request = notifychangeproperty(

1002

1738

datetime_to_dbus, "LastApprovalRequest")

1003

1739

approved_by_default = notifychangeproperty(dbus.Boolean,

1004

1740

"ApprovedByDefault")

1005

approval_delay = notifychangeproperty(dbus.UInt16,

1006

"ApprovalDelay",

1007

type_func =

1008

_timedelta_to_milliseconds)

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1009

1744

approval_duration = notifychangeproperty(

1010

dbus.UInt16, "ApprovalDuration",

1011

type_func = _timedelta_to_milliseconds)

1745

dbus.UInt64, "ApprovalDuration",

1746

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

1012

1747

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

1013

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

1014

type_func =

1015

_timedelta_to_milliseconds)

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1016

1751

extended_timeout = notifychangeproperty(

1017

dbus.UInt16, "ExtendedTimeout",

1018

type_func = _timedelta_to_milliseconds)

1019

interval = notifychangeproperty(dbus.UInt16,

1020

"Interval",

1021

type_func =

1022

_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)

1023

1757

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

1758

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

1759

invalidate_only=True)

1024

1760

1025

1761

del notifychangeproperty

1026

1762

1033

1769

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

1034

1770

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

1035

1771

1036

def checker_callback(self, pid, condition, command,

1037

*args, **kwargs):

1038

self.checker_callback_tag = None

1039

self.checker = None

1040

if os.WIFEXITED(condition):

1041

exitstatus = os.WEXITSTATUS(condition)

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:

1042

1779

# Emit D-Bus signal

1043

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

1044

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

1045

1783

dbus.String(command))

1046

1784

else:

1047

1785

# Emit D-Bus signal

1048

1786

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

1049

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

1050

1791

dbus.String(command))

1051

1052

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

1053

*args, **kwargs)

1792

return ret

1054

1793

1055

1794

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

1056

old_checker = self.checker

1057

if self.checker is not None:

1058

old_checker_pid = self.checker.pid

1059

else:

1060

old_checker_pid = None

1795

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

1061

1796

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

1062

1797

# Only if new checker process was started

1063

1798

if (self.checker is not None

1067

1802

return r

1068

1803

1069

1804

def _reset_approved(self):

1070

self._approved = None

1805

self.approved = None

1071

1806

return False

1072

1807

1073

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)

1074

1812

self.send_changedstate()

1075

self._approved = value

1076

gobject.timeout_add(_timedelta_to_milliseconds

1077

(self.approval_duration),

1078

self._reset_approved)

1079

1080

1813

1081

1814

## D-Bus methods, signals & properties

1082

_interface = "se.recompile.Mandos.Client"

1815

1816

## Interfaces

1083

1817

1084

1818

## Signals

1085

1819

1096

1830

pass

1097

1831

1098

1832

# PropertyChanged - signal

1833

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

1099

1834

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

1100

1835

def PropertyChanged(self, property, value):

1101

1836

"D-Bus signal"

1135

1870

self.checked_ok()

1136

1871

1137

1872

# Enable - method

1873

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

1138

1874

@dbus.service.method(_interface)

1139

1875

def Enable(self):

1140

1876

"D-Bus method"

1141

1877

self.enable()

1142

1878

1143

1879

# StartChecker - method

1880

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

1144

1881

@dbus.service.method(_interface)

1145

1882

def StartChecker(self):

1146

1883

"D-Bus method"

1147

1884

self.start_checker()

1148

1885

1149

1886

# Disable - method

1887

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

1150

1888

@dbus.service.method(_interface)

1151

1889

def Disable(self):

1152

1890

"D-Bus method"

1153

1891

self.disable()

1154

1892

1155

1893

# StopChecker - method

1894

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

1156

1895

@dbus.service.method(_interface)

1157

1896

def StopChecker(self):

1158

1897

self.stop_checker()

1165

1904

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

1166

1905

1167

1906

# ApprovedByDefault - property

1168

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

1169

1909

access="readwrite")

1170

1910

def ApprovedByDefault_dbus_property(self, value=None):

1171

1911

if value is None: # get

1173

1913

self.approved_by_default = bool(value)

1174

1914

1175

1915

# ApprovalDelay - property

1176

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

1177

1918

access="readwrite")

1178

1919

def ApprovalDelay_dbus_property(self, value=None):

1179

1920

if value is None: # get

1180

return dbus.UInt64(self.approval_delay_milliseconds())

1921

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

1922

* 1000)

1181

1923

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

1182

1924

1183

1925

# ApprovalDuration - property

1184

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

1185

1928

access="readwrite")

1186

1929

def ApprovalDuration_dbus_property(self, value=None):

1187

1930

if value is None: # get

1188

return dbus.UInt64(_timedelta_to_milliseconds(

1189

self.approval_duration))

1931

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

1932

* 1000)

1190

1933

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

1191

1934

1192

1935

# Name - property

1936

@dbus_annotations(

1937

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

1193

1938

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

1194

1939

def Name_dbus_property(self):

1195

1940

return dbus.String(self.name)

1196

1941

1197

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1198

1945

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

1199

1946

def Fingerprint_dbus_property(self):

1200

1947

return dbus.String(self.fingerprint)

1201

1948

1202

1949

# Host - property

1203

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1204

1952

access="readwrite")

1205

1953

def Host_dbus_property(self, value=None):

1206

1954

if value is None: # get

1207

1955

return dbus.String(self.host)

1208

self.host = value

1956

self.host = str(value)

1209

1957

1210

1958

# Created - property

1959

@dbus_annotations(

1960

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

1211

1961

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

1212

1962

def Created_dbus_property(self):

1213

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

1963

return datetime_to_dbus(self.created)

1214

1964

1215

1965

# LastEnabled - property

1216

1966

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

1218

1968

return datetime_to_dbus(self.last_enabled)

1219

1969

1220

1970

# Enabled - property

1221

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1222

1973

access="readwrite")

1223

1974

def Enabled_dbus_property(self, value=None):

1224

1975

if value is None: # get

1229

1980

self.disable()

1230

1981

1231

1982

# LastCheckedOK - property

1232

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1233

1985

access="readwrite")

1234

1986

def LastCheckedOK_dbus_property(self, value=None):

1235

1987

if value is not None:

1237

1989

return

1238

1990

return datetime_to_dbus(self.last_checked_ok)

1239

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

1240

1997

# Expires - property

1241

1998

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

1242

1999

def Expires_dbus_property(self):

1248

2005

return datetime_to_dbus(self.last_approval_request)

1249

2006

1250

2007

# Timeout - property

1251

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1252

2010

access="readwrite")

1253

2011

def Timeout_dbus_property(self, value=None):

1254

2012

if value is None: # get

1255

return dbus.UInt64(self.timeout_milliseconds())

2013

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

2014

old_timeout = self.timeout

1256

2015

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

1257

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

1258

return

1259

# Reschedule timeout

1260

gobject.source_remove(self.disable_initiator_tag)

1261

self.disable_initiator_tag = None

1262

self.expires = None

1263

time_to_die = _timedelta_to_milliseconds((self

1264

.last_checked_ok

1265

+ self.timeout)

1266

- datetime.datetime

1267

.utcnow())

1268

if time_to_die <= 0:

1269

# The timeout has passed

1270

self.disable()

1271

else:

1272

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

1273

+ datetime.timedelta(milliseconds =

1274

time_to_die))

1275

self.disable_initiator_tag = (gobject.timeout_add

1276

(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)

1277

2031

1278

2032

# ExtendedTimeout - property

1279

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1280

2035

access="readwrite")

1281

2036

def ExtendedTimeout_dbus_property(self, value=None):

1282

2037

if value is None: # get

1283

return dbus.UInt64(self.extended_timeout_milliseconds())

2038

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

2039

* 1000)

1284

2040

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

1285

2041

1286

2042

# Interval - property

1287

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1288

2045

access="readwrite")

1289

2046

def Interval_dbus_property(self, value=None):

1290

2047

if value is None: # get

1291

return dbus.UInt64(self.interval_milliseconds())

2048

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

1292

2049

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

1293

2050

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

1294

2051

return

1295

# Reschedule checker run

1296

gobject.source_remove(self.checker_initiator_tag)

1297

self.checker_initiator_tag = (gobject.timeout_add

1298

(value, self.start_checker))

1299

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

1300

2058

1301

2059

# Checker - property

1302

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1303

2062

access="readwrite")

1304

2063

def Checker_dbus_property(self, value=None):

1305

2064

if value is None: # get

1306

2065

return dbus.String(self.checker_command)

1307

self.checker_command = value

2066

self.checker_command = str(value)

1308

2067

1309

2068

# CheckerRunning - property

1310

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1311

2071

access="readwrite")

1312

2072

def CheckerRunning_dbus_property(self, value=None):

1313

2073

if value is None: # get

1318

2078

self.stop_checker()

1319

2079

1320

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

1321

2084

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

1322

2085

def ObjectPath_dbus_property(self):

1323

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1324

2087

1325

2088

# Secret = property

1326

@dbus_service_property(_interface, signature="ay",

1327

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)

1328

2096

def Secret_dbus_property(self, value):

1329

self.secret = str(value)

2097

self.secret = bytes(value)

1330

2098

1331

2099

del _interface

1332

2100

1336

2104

self._pipe = child_pipe

1337

2105

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

1338

2106

if not self._pipe.recv():

1339

raise KeyError()

2107

raise KeyError(fpr)

1340

2108

1341

2109

def __getattribute__(self, name):

1342

if(name == '_pipe'):

2110

if name == '_pipe':

1343

2111

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

1344

2112

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

1345

2113

data = self._pipe.recv()

1346

2114

if data[0] == 'data':

1347

2115

return data[1]

1348

2116

if data[0] == 'function':

2117

1349

2118

def func(*args, **kwargs):

1350

2119

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

1351

2120

return self._pipe.recv()[1]

2121

1352

2122

return func

1353

2123

1354

2124

def __setattr__(self, name, value):

1355

if(name == '_pipe'):

2125

if name == '_pipe':

1356

2126

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

1357

2127

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

1358

2128

1359

class ClientDBusTransitional(ClientDBus):

1360

__metaclass__ = AlternateDBusNamesMetaclass

1361

2129

1362

2130

class ClientHandler(socketserver.BaseRequestHandler, object):

1363

2131

"""A class to handle client connections.

1368

2136

def handle(self):

1369

2137

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

1370

2138

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

1371

unicode(self.client_address))

2139

str(self.client_address))

1372

2140

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

1373

2141

self.server.child_pipe.fileno())

1374

2142

1375

session = (gnutls.connection

1376

.ClientSession(self.request,

1377

gnutls.connection

1378

.X509Credentials()))

1379

1380

# Note: gnutls.connection.X509Credentials is really a

1381

# generic GnuTLS certificate credentials object so long as

1382

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

1383

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1384

2144

1385

2145

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

1386

2146

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

1390

2150

priority = self.server.gnutls_priority

1391

2151

if priority is None:

1392

2152

priority = "NORMAL"

1393

(gnutls.library.functions

1394

.gnutls_priority_set_direct(session._c_object,

1395

priority, None))

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1396

2155

1397

2156

# Start communication using the Mandos protocol

1398

2157

# Get protocol number

1400

2159

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

1401

2160

try:

1402

2161

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

1403

raise RuntimeError

2162

raise RuntimeError(line)

1404

2163

except (ValueError, IndexError, RuntimeError) as error:

1405

2164

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

1406

2165

return

1408

2167

# Start GnuTLS connection

1409

2168

try:

1410

2169

session.handshake()

1411

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1412

2171

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

1413

2172

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

1414

2173

# established. Just abandon the request.

1418

2177

approval_required = False

1419

2178

try:

1420

2179

try:

1421

fpr = self.fingerprint(self.peer_certificate

1422

(session))

1423

except (TypeError,

1424

gnutls.errors.GNUTLSError) as error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1425

2183

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

1426

2184

return

1427

2185

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

1440

2198

while True:

1441

2199

if not client.enabled:

1442

2200

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

1443

client.name)

2201

client.name)

1444

2202

if self.server.use_dbus:

1445

2203

# Emit D-Bus signal

1446

2204

client.Rejected("Disabled")

1447

2205

return

1448

2206

1449

if client._approved or not client.approval_delay:

2207

if client.approved or not client.approval_delay:

1450

2208

#We are approved or approval is disabled

1451

2209

break

1452

elif client._approved is None:

2210

elif client.approved is None:

1453

2211

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

1454

2212

client.name)

1455

2213

if self.server.use_dbus:

1456

2214

# Emit D-Bus signal

1457

2215

client.NeedApproval(

1458

client.approval_delay_milliseconds(),

1459

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1460

2218

else:

1461

2219

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

1462

2220

client.name)

1468

2226

#wait until timeout or approved

1469

2227

time = datetime.datetime.now()

1470

2228

client.changedstate.acquire()

1471

(client.changedstate.wait

1472

(float(client._timedelta_to_milliseconds(delay)

1473

/ 1000)))

2229

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

1474

2230

client.changedstate.release()

1475

2231

time2 = datetime.datetime.now()

1476

2232

if (time2 - time) >= delay:

1487

2243

else:

1488

2244

delay -= time2 - time

1489

2245

1490

sent_size = 0

1491

while sent_size < len(client.secret):

1492

try:

1493

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

1494

except gnutls.errors.GNUTLSError as error:

1495

logger.warning("gnutls send failed")

1496

return

1497

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

1498

sent, len(client.secret)

1499

- (sent_size + sent))

1500

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

1501

2252

1502

2253

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

1503

2254

# bump the timeout using extended_timeout

1504

client.checked_ok(client.extended_timeout)

2255

client.bump_timeout(client.extended_timeout)

1505

2256

if self.server.use_dbus:

1506

2257

# Emit D-Bus signal

1507

2258

client.GotSecret()

1511

2262

client.approvals_pending -= 1

1512

2263

try:

1513

2264

session.bye()

1514

except gnutls.errors.GNUTLSError as error:

1515

logger.warning("GnuTLS bye failed")

2265

except gnutls.Error as error:

2266

logger.warning("GnuTLS bye failed",

2267

exc_info=error)

1516

2268

1517

2269

@staticmethod

1518

2270

def peer_certificate(session):

1519

2271

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

1520

2272

# If not an OpenPGP certificate...

1521

if (gnutls.library.functions

1522

.gnutls_certificate_type_get(session._c_object)

1523

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1524

# ...do the normal thing

1525

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1526

2277

list_size = ctypes.c_uint(1)

1527

cert_list = (gnutls.library.functions

1528

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1529

2279

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

1530

2280

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

1531

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

1532

" certificate")

2281

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

1533

2282

if list_size.value == 0:

1534

2283

return None

1535

2284

cert = cert_list[0]

1539

2288

def fingerprint(openpgp):

1540

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1541

2290

# New GnuTLS "datum" with the OpenPGP public key

1542

datum = (gnutls.library.types

1543

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

1544

ctypes.POINTER

1545

(ctypes.c_ubyte)),

1546

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)))

1547

2295

# New empty GnuTLS certificate

1548

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1549

(gnutls.library.functions

1550

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1551

2298

# Import the OpenPGP public key into the certificate

1552

(gnutls.library.functions

1553

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

1554

gnutls.library.constants

1555

.GNUTLS_OPENPGP_FMT_RAW))

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1556

2301

# Verify the self signature in the key

1557

2302

crtverify = ctypes.c_uint()

1558

(gnutls.library.functions

1559

.gnutls_openpgp_crt_verify_self(crt, 0,

1560

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1561

2305

if crtverify.value != 0:

1562

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1563

raise (gnutls.errors.CertificateSecurityError

1564

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1565

2308

# New buffer for the fingerprint

1566

2309

buf = ctypes.create_string_buffer(20)

1567

2310

buf_len = ctypes.c_size_t()

1568

2311

# Get the fingerprint from the certificate into the buffer

1569

(gnutls.library.functions

1570

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

1571

ctypes.byref(buf_len)))

2312

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

2313

ctypes.byref(buf_len))

1572

2314

# Deinit the certificate

1573

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1574

2316

# Convert the buffer to a Python bytestring

1575

2317

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

1576

2318

# Convert the bytestring to hexadecimal notation

1577

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

2319

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

1578

2320

return hex_fpr

1579

2321

1580

2322

1581

2323

class MultiprocessingMixIn(object):

1582

2324

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

2325

1583

2326

def sub_process_main(self, request, address):

1584

2327

try:

1585

2328

self.finish_request(request, address)

1586

except:

2329

except Exception:

1587

2330

self.handle_error(request, address)

1588

2331

self.close_request(request)

1589

2332

1590

2333

def process_request(self, request, address):

1591

2334

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

1592

2335

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

1593

args = (request,

1594

address))

2336

args = (request, address))

1595

2337

proc.start()

1596

2338

return proc

1597

2339

1598

2340

1599

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1600

2342

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

2343

1601

2344

def process_request(self, request, client_address):

1602

2345

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

1603

2346

1612

2355

1613

2356

def add_pipe(self, parent_pipe, proc):

1614

2357

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

1615

raise NotImplementedError

2358

raise NotImplementedError()

1616

2359

1617

2360

1618

2361

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1624

2367

interface: None or a network interface name (string)

1625

2368

use_ipv6: Boolean; to use IPv6 or not

1626

2369

"""

2370

1627

2371

def __init__(self, server_address, RequestHandlerClass,

1628

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

"""

1629

2378

self.interface = interface

1630

2379

if use_ipv6:

1631

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.

1632

2407

socketserver.TCPServer.__init__(self, server_address,

1633

2408

RequestHandlerClass)

2409

1634

2410

def server_bind(self):

1635

2411

"""This overrides the normal server_bind() function

1636

2412

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

1642

2418

self.interface)

1643

2419

else:

1644

2420

try:

1645

self.socket.setsockopt(socket.SOL_SOCKET,

1646

SO_BINDTODEVICE,

1647

str(self.interface

1648

+ '\0'))

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1649

2424

except socket.error as error:

1650

if error[0] == errno.EPERM:

1651

logger.error("No permission to"

1652

" bind to interface %s",

1653

self.interface)

1654

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:

1655

2429

logger.error("SO_BINDTODEVICE not available;"

1656

2430

" cannot bind to interface %s",

1657

2431

self.interface)

2432

elif error.errno == errno.ENODEV:

2433

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

2434

" cannot bind", self.interface)

1658

2435

else:

1659

2436

raise

1660

2437

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

1663

2440

if self.address_family == socket.AF_INET6:

1664

2441

any_address = "::" # in6addr_any

1665

2442

else:

1666

any_address = socket.INADDR_ANY

2443

any_address = "0.0.0.0" # INADDR_ANY

1667

2444

self.server_address = (any_address,

1668

2445

self.server_address[1])

1669

2446

elif not self.server_address[1]:

1670

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

1671

0)

2447

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

1672

2448

# if self.interface:

1673

2449

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

1674

2450

# 0, # port

1686

2462

gnutls_priority GnuTLS priority string

1687

2463

use_dbus: Boolean; to emit D-Bus signals or not

1688

2464

1689

Assumes a gobject.MainLoop event loop.

2465

Assumes a GObject.MainLoop event loop.

1690

2466

"""

2467

1691

2468

def __init__(self, server_address, RequestHandlerClass,

1692

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

1693

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):

1694

2475

self.enabled = False

1695

2476

self.clients = clients

1696

2477

if self.clients is None:

1700

2481

IPv6_TCPServer.__init__(self, server_address,

1701

2482

RequestHandlerClass,

1702

2483

interface = interface,

1703

use_ipv6 = use_ipv6)

2484

use_ipv6 = use_ipv6,

2485

socketfd = socketfd)

2486

1704

2487

def server_activate(self):

1705

2488

if self.enabled:

1706

2489

return socketserver.TCPServer.server_activate(self)

1710

2493

1711

2494

def add_pipe(self, parent_pipe, proc):

1712

2495

# Call "handle_ipc" for both data and EOF events

1713

gobject.io_add_watch(parent_pipe.fileno(),

1714

gobject.IO_IN | gobject.IO_HUP,

1715

functools.partial(self.handle_ipc,

1716

parent_pipe =

1717

parent_pipe,

1718

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))

1719

2502

1720

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

1721

proc = None, client_object=None):

1722

condition_names = {

1723

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

1724

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

1725

# blocking).

1726

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

1727

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

1728

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

1729

# broken, usually for pipes and

1730

# sockets).

1731

}

1732

conditions_string = ' | '.join(name

1733

for cond, name in

1734

condition_names.iteritems()

1735

if cond & condition)

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

2506

client_object=None):

1736

2507

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

1737

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

2508

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

1738

2509

# Wait for other process to exit

1739

2510

proc.join()

1740

2511

return False

1761

2532

parent_pipe.send(False)

1762

2533

return False

1763

2534

1764

gobject.io_add_watch(parent_pipe.fileno(),

1765

gobject.IO_IN | gobject.IO_HUP,

1766

functools.partial(self.handle_ipc,

1767

parent_pipe =

1768

parent_pipe,

1769

proc = proc,

1770

client_object =

1771

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))

1772

2542

parent_pipe.send(True)

1773

2543

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

1774

2544

# same fileno

1780

2550

1781

2551

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

1782

2552

funcname)(*args,

1783

**kwargs)))

2553

**kwargs)))

1784

2554

1785

2555

if command == 'getattr':

1786

2556

attrname = request[1]

1787

if callable(client_object.__getattribute__(attrname)):

1788

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

1789

2560

else:

1790

parent_pipe.send(('data', client_object

1791

.__getattribute__(attrname)))

2561

parent_pipe.send((

2562

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

1792

2563

1793

2564

if command == 'setattr':

1794

2565

attrname = request[1]

1798

2569

return True

1799

2570

1800

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

1801

2668

def string_to_delta(interval):

1802

2669

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

1803

2670

1814

2681

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

1815

2682

datetime.timedelta(0, 330)

1816

2683

"""

2684

2685

try:

2686

return rfc3339_duration_to_delta(interval)

2687

except ValueError:

2688

pass

2689

1817

2690

timevalue = datetime.timedelta(0)

1818

2691

for s in interval.split():

1819

2692

try:

1820

suffix = unicode(s[-1])

2693

suffix = s[-1]

1821

2694

value = int(s[:-1])

1822

2695

if suffix == "d":

1823

2696

delta = datetime.timedelta(value)

1830

2703

elif suffix == "w":

1831

2704

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

1832

2705

else:

1833

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

1834

except (ValueError, IndexError) as e:

2706

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

2707

except IndexError as e:

1835

2708

raise ValueError(*(e.args))

1836

2709

timevalue += delta

1837

2710

return timevalue

1838

2711

1839

2712

1840

def if_nametoindex(interface):

1841

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

1842

1843

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

1844

global if_nametoindex

1845

try:

1846

if_nametoindex = (ctypes.cdll.LoadLibrary

1847

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

1848

.if_nametoindex)

1849

except (OSError, AttributeError):

1850

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

1851

def if_nametoindex(interface):

1852

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

1853

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

1854

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

1855

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1856

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

1857

interface))

1858

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

1859

ifreq[16:20])[0]

1860

return interface_index

1861

return if_nametoindex(interface)

1862

1863

1864

2713

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

1865

2714

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

1866

2715

1874

2723

sys.exit()

1875

2724

if not noclose:

1876

2725

# Close all standard open file descriptors

1877

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

2726

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

1878

2727

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

1879

2728

raise OSError(errno.ENODEV,

1880

"%s not a character device"

1881

% os.path.devnull)

2729

"{} not a character device"

2730

.format(os.devnull))

1882

2731

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

1883

2732

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

1884

2733

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

1893

2742

1894

2743

parser = argparse.ArgumentParser()

1895

2744

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

1896

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

2745

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

1897

2746

help="show version number and exit")

1898

2747

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

1899

2748

help="Bind to interface IF")

1905

2754

help="Run self-test")

1906

2755

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

1907

2756

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

1908

" to terminal")

2757

" to terminal", default=None)

1909

2758

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

1910

2759

help="Debug level for stdout output")

1911

2760

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

1918

2767

" files")

1919

2768

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

1920

2769

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

1921

" system bus interface")

2770

" system bus interface", default=None)

1922

2771

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

1923

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

2772

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

2773

default=None)

1924

2774

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

1925

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

1926

default=True)

1927

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

1928

2788

options = parser.parse_args()

1929

2789

1930

2790

if options.check:

1931

2791

import doctest

1932

doctest.testmod()

1933

sys.exit()

2792

fail_count, test_count = doctest.testmod()

2793

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

1934

2794

1935

2795

# Default values for config file for server-global settings

1936

2796

server_defaults = { "interface": "",

1938

2798

"port": "",

1939

2799

"debug": "False",

1940

2800

"priority":

1941

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

2801

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

2802

":+SIGN-DSA-SHA256",

1942

2803

"servicename": "Mandos",

1943

2804

"use_dbus": "True",

1944

2805

"use_ipv6": "True",

1945

2806

"debuglevel": "",

1946

}

2807

"restore": "True",

2808

"socket": "",

2809

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

2810

"foreground": "False",

2811

"zeroconf": "True",

2812

}

1947

2813

1948

2814

# Parse config file for server-global settings

1949

2815

server_config = configparser.SafeConfigParser(server_defaults)

1950

2816

del server_defaults

1951

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

1952

"mandos.conf"))

2817

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

1953

2818

# Convert the SafeConfigParser object to a dict

1954

2819

server_settings = server_config.defaults()

1955

2820

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

1956

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

2821

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

1957

2822

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

1958

2823

option)

1959

2824

if server_settings["port"]:

1960

2825

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

1961

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"])

1962

2836

del server_config

1963

2837

1964

2838

# Override the settings from the config file with command line

1965

2839

# options, if set.

1966

2840

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

1967

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

1968

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

2841

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

2842

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

2843

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

1969

2844

value = getattr(options, option)

1970

2845

if value is not None:

1971

2846

server_settings[option] = value

1972

2847

del options

1973

2848

# Force all strings to be unicode

1974

2849

for option in server_settings.keys():

1975

if type(server_settings[option]) is str:

1976

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

1977

2860

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

1978

2861

1979

2862

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

1980

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

1981

2869

# For convenience

1982

2870

debug = server_settings["debug"]

1983

2871

debuglevel = server_settings["debuglevel"]

1984

2872

use_dbus = server_settings["use_dbus"]

1985

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)

1986

2887

1987

2888

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

1988

syslogger.setFormatter(logging.Formatter

1989

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

1990

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

1991

% server_settings["servicename"]))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

1992

2893

1993

2894

# Parse config file with clients

1994

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

1995

"extended_timeout": "15m",

1996

"interval": "2m",

1997

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

1998

"host": "",

1999

"approval_delay": "0s",

2000

"approval_duration": "1s",

2001

}

2002

client_config = configparser.SafeConfigParser(client_defaults)

2895

client_config = configparser.SafeConfigParser(Client

2896

.client_defaults)

2003

2897

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

2004

2898

"clients.conf"))

2005

2899

2006

2900

global mandos_dbus_service

2007

2901

mandos_dbus_service = None

2008

2902

2009

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

2010

server_settings["port"]),

2011

ClientHandler,

2012

interface=(server_settings["interface"]

2013

or None),

2014

use_ipv6=use_ipv6,

2015

gnutls_priority=

2016

server_settings["priority"],

2017

use_dbus=use_dbus)

2018

if not debug:

2019

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

2020

2919

try:

2021

pidfile = open(pidfilename, "w")

2022

except IOError:

2023

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)

2024

2924

2025

try:

2026

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

2027

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

2028

except KeyError:

2925

for name, group in (("_mandos", "_mandos"),

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

2029

2928

try:

2030

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

2031

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

2929

uid = pwd.getpwnam(name).pw_uid

2930

gid = pwd.getpwnam(group).pw_gid

2931

break

2032

2932

except KeyError:

2033

try:

2034

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

2035

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

2036

except KeyError:

2037

uid = 65534

2038

gid = 65534

2933

continue

2934

else:

2935

uid = 65534

2936

gid = 65534

2039

2937

try:

2040

2938

os.setgid(gid)

2041

2939

os.setuid(uid)

2042

2940

except OSError as error:

2043

if error[0] != errno.EPERM:

2044

raise error

2045

2046

if not debug and not debuglevel:

2047

logger.setLevel(logging.WARNING)

2048

if debuglevel:

2049

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

2050

logger.setLevel(level)

2941

if error.errno != errno.EPERM:

2942

raise

2051

2943

2052

2944

if debug:

2053

logger.setLevel(logging.DEBUG)

2054

2945

# Enable all possible GnuTLS debugging

2055

2946

2056

2947

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

2057

2948

# - GnuTLS manual

2058

gnutls.library.functions.gnutls_global_set_log_level(11)

2949

gnutls.global_set_log_level(11)

2059

2950

2060

@gnutls.library.types.gnutls_log_func

2951

@gnutls.log_func

2061

2952

def debug_gnutls(level, string):

2062

2953

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

2063

2954

2064

(gnutls.library.functions

2065

.gnutls_global_set_log_function(debug_gnutls))

2955

gnutls.global_set_log_function(debug_gnutls)

2066

2956

2067

2957

# Redirect stdin so all checkers get /dev/null

2068

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

2958

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

2069

2959

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

2070

2960

if null > 2:

2071

2961

os.close(null)

2072

else:

2073

# No console logging

2074

logger.removeHandler(console)

2075

2962

2076

2963

# Need to fork before connecting to D-Bus

2077

if not debug:

2964

if not foreground:

2078

2965

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

2079

2966

daemon()

2080

2967

2968

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

2969

# need to inform GObject that threads will be used.

2970

GObject.threads_init()

2971

2081

2972

global main_loop

2082

2973

# From the Avahi example code

2083

DBusGMainLoop(set_as_default=True )

2084

main_loop = gobject.MainLoop()

2974

DBusGMainLoop(set_as_default=True)

2975

main_loop = GObject.MainLoop()

2085

2976

bus = dbus.SystemBus()

2086

2977

# End of Avahi example code

2087

2978

if use_dbus:

2088

2979

try:

2089

2980

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

2090

bus, do_not_queue=True)

2091

old_bus_name = (dbus.service.BusName

2092

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

2093

do_not_queue=True))

2094

except dbus.exceptions.NameExistsException as e:

2095

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

2981

bus,

2982

do_not_queue=True)

2983

old_bus_name = dbus.service.BusName(

2984

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

2985

do_not_queue=True)

2986

except dbus.exceptions.DBusException as e:

2987

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

2096

2988

use_dbus = False

2097

2989

server_settings["use_dbus"] = False

2098

2990

tcp_server.use_dbus = False

2099

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2100

service = AvahiServiceToSyslog(name =

2101

server_settings["servicename"],

2102

servicetype = "_mandos._tcp",

2103

protocol = protocol, bus = bus)

2104

if server_settings["interface"]:

2105

service.interface = (if_nametoindex

2106

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

2991

if zeroconf:

2992

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2993

service = AvahiServiceToSyslog(

2994

name = server_settings["servicename"],

2995

servicetype = "_mandos._tcp",

2996

protocol = protocol,

2997

bus = bus)

2998

if server_settings["interface"]:

2999

service.interface = if_nametoindex(

3000

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

2107

3001

2108

3002

global multiprocessing_manager

2109

3003

multiprocessing_manager = multiprocessing.Manager()

2110

3004

2111

3005

client_class = Client

2112

3006

if use_dbus:

2113

client_class = functools.partial(ClientDBusTransitional,

2114

bus = bus)

2115

2116

special_settings = {

2117

# Some settings need to be accessd by special methods;

2118

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

2119

"approved_by_default":

2120

lambda section:

2121

client_config.getboolean(section, "approved_by_default"),

2122

}

2123

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

2124

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

2125

# with exceptions for any special settings as defined above

2126

client_settings = dict((clientname,

2127

dict((setting,

2128

(value if setting not in special_settings

2129

else special_settings[setting](clientname)))

2130

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

2131

for clientname in client_config.sections())

2132

3007

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

3008

3009

client_settings = Client.config_parser(client_config)

2133

3010

old_client_settings = {}

2134

clients_data = []

2135

2136

# Get client data and settings from last running state.

3011

clients_data = {}

3012

3013

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

3014

global wnull

3015

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

3016

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

3017

# mode

3018

if debug or not foreground:

3019

wnull.close()

3020

3021

# Get client data and settings from last running state.

2137

3022

if server_settings["restore"]:

2138

3023

try:

2139

3024

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

2140

clients_data, old_client_settings = pickle.load(stored_state)

3025

clients_data, old_client_settings = pickle.load(

3026

stored_state)

2141

3027

os.remove(stored_state_path)

2142

3028

except IOError as e:

2143

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

2144

if e.errno != errno.ENOENT:

3029

if e.errno == errno.ENOENT:

3030

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

3031

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

3032

else:

3033

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

3034

exc_info=e)

2145

3035

raise

2146

2147

for client in clients_data:

2148

client_name = client["name"]

2149

2150

# Decide which value to use after restoring saved state.

2151

# We have three different values: Old config file,

2152

# new config file, and saved state.

2153

# New config value takes precedence if it differs from old

2154

# config value, otherwise use saved state.

2155

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

3036

except EOFError as e:

3037

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

3038

"EOFError:",

3039

exc_info=e)

3040

3041

with PGPEngine() as pgp:

3042

for client_name, client in clients_data.items():

3043

# Skip removed clients

3044

if client_name not in client_settings:

3045

continue

3046

3047

# Decide which value to use after restoring saved state.

3048

# We have three different values: Old config file,

3049

# new config file, and saved state.

3050

# New config value takes precedence if it differs from old

3051

# config value, otherwise use saved state.

3052

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

3053

try:

3054

# For each value in new config, check if it

3055

# differs from the old config value (Except for

3056

# the "secret" attribute)

3057

if (name != "secret"

3058

and (value !=

3059

old_client_settings[client_name][name])):

3060

client[name] = value

3061

except KeyError:

3062

pass

3063

3064

# Clients who has passed its expire date can still be

3065

# enabled if its last checker was successful. A Client

3066

# whose checker succeeded before we stored its state is

3067

# assumed to have successfully run all checkers during

3068

# downtime.

3069

if client["enabled"]:

3070

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

3071

if not client["last_checked_ok"]:

3072

logger.warning(

3073

"disabling client {} - Client never "

3074

"performed a successful checker".format(

3075

client_name))

3076

client["enabled"] = False

3077

elif client["last_checker_status"] != 0:

3078

logger.warning(

3079

"disabling client {} - Client last"

3080

" checker failed with error code"

3081

" {}".format(

3082

client_name,

3083

client["last_checker_status"]))

3084

client["enabled"] = False

3085

else:

3086

client["expires"] = (

3087

datetime.datetime.utcnow()

3088

+ client["timeout"])

3089

logger.debug("Last checker succeeded,"

3090

" keeping {} enabled".format(

3091

client_name))

2156

3092

try:

2157

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

2158

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

2159

# attribute)

2160

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

2161

setattr(client, name, value)

2162

except KeyError:

2163

pass

2164

2165

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

2166

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

2167

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

2168

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

2169

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

2170

> client["interval"]):

2171

if client["last_checker_status"] != 0:

2172

client["enabled"] = False

2173

else:

2174

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

2175

2176

client["changedstate"] = (multiprocessing_manager

2177

.Condition(multiprocessing_manager

2178

.Lock()))

2179

if use_dbus:

2180

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2181

tcp_server.clients[client_name] = new_client

2182

new_client.bus = bus

2183

for name, value in client.iteritems():

2184

setattr(new_client, name, value)

2185

client_object_name = unicode(client_name).translate(

2186

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

2187

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

2188

new_client.dbus_object_path = (dbus.ObjectPath

2189

("/clients/" + client_object_name))

2190

DBusObjectWithProperties.__init__(new_client,

2191

new_client.bus,

2192

new_client.dbus_object_path)

2193

else:

2194

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

2195

for name, value in client.iteritems():

2196

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

2197

2198

tcp_server.clients[client_name].decrypt_secret(

2199

client_settings[client_name]["secret"])

2200

2201

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

2202

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

2203

del tcp_server.clients[clientname]

2204

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

2205

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

2206

config =

2207

client_settings

2208

[clientname]))

2209

2210

3093

client["secret"] = pgp.decrypt(

3094

client["encrypted_secret"],

3095

client_settings[client_name]["secret"])

3096

except PGPError:

3097

# If decryption fails, we use secret from new settings

3098

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

3099

client_name))

3100

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

3101

["secret"])

3102

3103

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

3104

for client_name in (set(old_client_settings)

3105

- set(client_settings)):

3106

del clients_data[client_name]

3107

for client_name in (set(client_settings)

3108

- set(old_client_settings)):

3109

clients_data[client_name] = client_settings[client_name]

3110

3111

# Create all client objects

3112

for client_name, client in clients_data.items():

3113

tcp_server.clients[client_name] = client_class(

3114

name = client_name,

3115

settings = client,

3116

server_settings = server_settings)

3117

2211

3118

if not tcp_server.clients:

2212

3119

logger.warning("No clients defined")

2213

2214

if not debug:

2215

try:

2216

with pidfile:

2217

pid = os.getpid()

2218

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

2219

del pidfile

2220

except IOError:

2221

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

2222

pidfilename, pid)

2223

except NameError:

2224

# "pidfile" was never created

2225

pass

3120

3121

if not foreground:

3122

if pidfile is not None:

3123

pid = os.getpid()

3124

try:

3125

with pidfile:

3126

print(pid, file=pidfile)

3127

except IOError:

3128

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

3129

pidfilename, pid)

3130

del pidfile

2226

3131

del pidfilename

2227

2228

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

2229

3132

2230

3133

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

2231

3134

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

2232

3135

2233

3136

if use_dbus:

2234

class MandosDBusService(dbus.service.Object):

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2235

3141

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

3142

2236

3143

def __init__(self):

2237

3144

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

3145

2238

3146

_interface = "se.recompile.Mandos"

2239

3147

2240

3148

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

2247

3155

"D-Bus signal"

2248

3156

pass

2249

3157

3158

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

3159

"true"})

2250

3160

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

2251

3161

def ClientRemoved(self, objpath, name):

2252

3162

"D-Bus signal"

2253

3163

pass

2254

3164

3165

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

3166

"true"})

2255

3167

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

2256

3168

def GetAllClients(self):

2257

3169

"D-Bus method"

2258

return dbus.Array(c.dbus_object_path

2259

for c in

3170

return dbus.Array(c.dbus_object_path for c in

2260

3171

tcp_server.clients.itervalues())

2261

3172

3173

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

3174

"true"})

2262

3175

@dbus.service.method(_interface,

2263

3176

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

2264

3177

def GetAllClientsWithProperties(self):

2265

3178

"D-Bus method"

2266

3179

return dbus.Dictionary(

2267

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

2268

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

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2269

3183

signature="oa{sv}")

2270

3184

2271

3185

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

2275

3189

if c.dbus_object_path == object_path:

2276

3190

del tcp_server.clients[c.name]

2277

3191

c.remove_from_connection()

2278

# Don't signal anything except ClientRemoved

3192

# Don't signal the disabling

2279

3193

c.disable(quiet=True)

2280

# Emit D-Bus signal

2281

self.ClientRemoved(object_path, c.name)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2282

3196

return

2283

3197

raise KeyError(object_path)

2284

3198

2285

3199

del _interface

3200

3201

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3202

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

3203

def GetManagedObjects(self):

3204

"""D-Bus method"""

3205

return dbus.Dictionary(

3206

{ client.dbus_object_path:

3207

dbus.Dictionary(

3208

{ interface: client.GetAll(interface)

3209

for interface in

3210

client._get_all_interface_names()})

3211

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

3212

3213

def client_added_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesAdded(

3218

client.dbus_object_path,

3219

dbus.Dictionary(

3220

{ interface: client.GetAll(interface)

3221

for interface in

3222

client._get_all_interface_names()}))

3223

# Old signal

3224

self.ClientAdded(client.dbus_object_path)

3225

3226

def client_removed_signal(self, client):

3227

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

3228

if use_dbus:

3229

# New standard signal

3230

self.InterfacesRemoved(

3231

client.dbus_object_path,

3232

client._get_all_interface_names())

3233

# Old signal

3234

self.ClientRemoved(client.dbus_object_path,

3235

client.name)

2286

3236

2287

class MandosDBusServiceTransitional(MandosDBusService):

2288

__metaclass__ = AlternateDBusNamesMetaclass

2289

mandos_dbus_service = MandosDBusServiceTransitional()

3237

mandos_dbus_service = MandosDBusService()

2290

3238

2291

3239

def cleanup():

2292

3240

"Cleanup function; run on exit"

2293

service.cleanup()

3241

if zeroconf:

3242

service.cleanup()

2294

3243

2295

3244

multiprocessing.active_children()

3245

wnull.close()

2296

3246

if not (tcp_server.clients or client_settings):

2297

3247

return

2298

2299

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

2300

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

2301

# secret will thus be unrecovable.

2302

clients = []

2303

for client in tcp_server.clients.itervalues():

2304

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

2305

2306

client_dict = {}

2307

2308

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

2309

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

2310

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

2311

exclude.add(name)

2312

2313

client_dict["encrypted_secret"] = client.encrypted_secret

2314

for attr in client.client_structure:

2315

if attr not in exclude:

2316

client_dict[attr] = getattr(client, attr)

2317

2318

clients.append(client_dict)

2319

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

2320

3248

3249

# Store client before exiting. Secrets are encrypted with key

3250

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

3251

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

3252

clients = {}

3253

with PGPEngine() as pgp:

3254

for client in tcp_server.clients.itervalues():

3255

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

3256

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

3257

key)

3258

client_dict = {}

3259

3260

# A list of attributes that can not be pickled

3261

# + secret.

3262

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

3263

"checker", "server_settings" }

3264

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

3265

.Object):

3266

exclude.add(name)

3267

3268

client_dict["encrypted_secret"] = (client

3269

.encrypted_secret)

3270

for attr in client.client_structure:

3271

if attr not in exclude:

3272

client_dict[attr] = getattr(client, attr)

3273

3274

clients[client.name] = client_dict

3275

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

3276

2321

3277

try:

2322

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

3278

with tempfile.NamedTemporaryFile(

3279

mode='wb',

3280

suffix=".pickle",

3281

prefix='clients-',

3282

dir=os.path.dirname(stored_state_path),

3283

delete=False) as stored_state:

2323

3284

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

2324

except IOError as e:

2325

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

2326

if e.errno != errno.ENOENT:

3285

tempname = stored_state.name

3286

os.rename(tempname, stored_state_path)

3287

except (IOError, OSError) as e:

3288

if not debug:

3289

try:

3290

os.remove(tempname)

3291

except NameError:

3292

pass

3293

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

3294

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

3295

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

3296

else:

3297

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

3298

exc_info=e)

2327

3299

raise

2328

3300

2329

3301

# Delete all clients, and settings from config

2330

3302

while tcp_server.clients:

2331

3303

name, client = tcp_server.clients.popitem()

2332

3304

if use_dbus:

2333

3305

client.remove_from_connection()

2334

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

2335

3307

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

2336

3309

if use_dbus:

2337

# Emit D-Bus signal

2338

mandos_dbus_service.ClientRemoved(client

2339

.dbus_object_path,

2340

client.name)

3310

mandos_dbus_service.client_removed_signal(client)

2341

3311

client_settings.clear()

2342

3312

2343

3313

atexit.register(cleanup)

2344

3314

2345

3315

for client in tcp_server.clients.itervalues():

2346

3316

if use_dbus:

2347

# Emit D-Bus signal

2348

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

2349

3319

# Need to initiate checking of clients

2350

3320

if client.enabled:

2351

3321

client.init_checker()

2352

2353

3322

2354

3323

tcp_server.enable()

2355

3324

tcp_server.server_activate()

2356

3325

2357

3326

# Find out what port we got

2358

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

3327

if zeroconf:

3328

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

2359

3329

if use_ipv6:

2360

3330

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

2361

" flowinfo %d, scope_id %d"

2362

% tcp_server.socket.getsockname())

3331

" flowinfo %d, scope_id %d",

3332

*tcp_server.socket.getsockname())

2363

3333

else: # IPv4

2364

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

2365

% tcp_server.socket.getsockname())

3334

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

3335

*tcp_server.socket.getsockname())

2366

3336

2367

3337

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

2368

3338

2369

3339

try:

2370

# From the Avahi example code

2371

try:

2372

service.activate()

2373

except dbus.exceptions.DBusException as error:

2374

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

2375

cleanup()

2376

sys.exit(1)

2377

# End of Avahi example code

3340

if zeroconf:

3341

# From the Avahi example code

3342

try:

3343

service.activate()

3344

except dbus.exceptions.DBusException as error:

3345

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

3346

cleanup()

3347

sys.exit(1)

3348

# End of Avahi example code

2378

3349

2379

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

3350

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

2380

3351

lambda *args, **kwargs:

2381

3352

(tcp_server.handle_request

2382

3353

(*args[2:], **kwargs) or True))

2384

3355

logger.debug("Starting main loop")

2385

3356

main_loop.run()

2386

3357

except AvahiError as error:

2387

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

3358

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

2388

3359

cleanup()

2389

3360

sys.exit(1)

2390

3361

except KeyboardInterrupt: