/mandos/trunk : revision 885

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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#

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# Mandos server - give out binary blobs to connecting clients.

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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# <http://avahi.org/wiki/PythonPublishExample>. This includes the

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# methods "add", "remove", "server_state_changed",

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# "entry_group_state_changed", "cleanup", and "activate" in the

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

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#

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#

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# Everything else is

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#

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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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# the Free Software Foundation, either version 3 of the License, or

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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#

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# Contact the authors at <mandos@recompile.se>.

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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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 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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import avahi

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from gi.repository import GLib

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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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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.5"

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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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 = "1.7.13"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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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(str("16s16x"),

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interface))

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

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ifreq[16:20])[0]

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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 copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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

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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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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(b":")

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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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'--home', self.tempdir,

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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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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--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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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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# 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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.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(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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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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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(dir = self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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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

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= data)

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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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# Pretend that we have an Avahi module

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class Avahi(object):

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

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It is instantiated once, and simulates having an Avahi module."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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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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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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Used to optionally bind to the specified interface.

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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"""

279

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if self.rename_count >= self.max_renames:

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

281

369

" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

284

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()

377

if remove:

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self.remove()

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try:

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self.add()

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381

except dbus.exceptions.DBusException as error:

292

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

293

self.cleanup()

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os._exit(1)

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self.rename_count += 1

296

382

if (error.get_dbus_name()

383

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

384

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

385

return self.rename(remove=False)

386

else:

387

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

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self.cleanup()

389

os._exit(1)

390

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def remove(self):

298

392

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

299

393

if self.entry_group_state_changed_match is not None:

301

395

self.entry_group_state_changed_match = None

302

396

if self.group is not None:

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397

self.group.Reset()

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398

305

399

def add(self):

306

400

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

307

401

self.remove()

324

418

dbus.UInt16(self.port),

325

419

avahi.string_array_to_txt_array(self.TXT))

326

420

self.group.Commit()

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421

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def entry_group_state_changed(self, state, error):

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423

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

330

424

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

331

425

332

426

if state == avahi.ENTRY_GROUP_ESTABLISHED:

333

427

logger.debug("Zeroconf service established.")

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428

elif state == avahi.ENTRY_GROUP_COLLISION:

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430

self.rename()

337

431

elif state == avahi.ENTRY_GROUP_FAILURE:

338

432

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

339

unicode(error))

340

raise AvahiGroupError("State changed: {0!s}"

341

.format(error))

342

433

str(error))

434

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

435

343

436

def cleanup(self):

344

437

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

345

438

if self.group is not None:

350

443

pass

351

444

self.group = None

352

445

self.remove()

353

446

354

447

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

355

448

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

356

449

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

357

bad_states = { avahi.SERVER_INVALID:

358

"Zeroconf server invalid",

359

avahi.SERVER_REGISTERING: None,

360

avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

362

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

364

456

if state in bad_states:

365

457

if bad_states[state] is not None:

366

458

if error is None:

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461

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

370

462

self.cleanup()

371

463

elif state == avahi.SERVER_RUNNING:

372

self.add()

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

373

476

else:

374

477

if error is None:

375

478

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

376

479

else:

377

480

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

378

481

379

482

def activate(self):

380

483

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

381

484

if self.server is None:

385

488

follow_name_owner_changes=True),

386

489

avahi.DBUS_INTERFACE_SERVER)

387

490

self.server.connect_to_signal("StateChanged",

388

self.server_state_changed)

491

self.server_state_changed)

389

492

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

390

493

391

494

392

495

class AvahiServiceToSyslog(AvahiService):

393

def rename(self):

496

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

394

497

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

395

ret = AvahiService.rename(self)

396

syslogger.setFormatter(logging.Formatter

397

('Mandos ({0}) [%(process)d]:'

398

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

399

.format(self.name)))

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

400

502

return ret

401

503

402

504

403

def timedelta_to_milliseconds(td):

404

"Convert a datetime.timedelta() to milliseconds"

405

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

406

+ (td.seconds * 1000)

407

+ (td.microseconds // 1000))

505

# Pretend that we have a GnuTLS module

506

class GnuTLS(object):

507

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

508

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

509

510

library = ctypes.util.find_library("gnutls")

511

if library is None:

512

library = ctypes.util.find_library("gnutls-deb0")

513

_library = ctypes.cdll.LoadLibrary(library)

514

del library

515

_need_version = b"3.3.0"

516

517

def __init__(self):

518

# Need to use "self" here, since this method is called before

519

# the assignment to the "gnutls" global variable happens.

520

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

521

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

522

.format(self._need_version))

523

524

# Unless otherwise indicated, the constants and types below are

525

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

526

527

# Constants

528

E_SUCCESS = 0

529

E_INTERRUPTED = -52

530

E_AGAIN = -28

531

CRT_OPENPGP = 2

532

CLIENT = 2

533

SHUT_RDWR = 0

534

CRD_CERTIFICATE = 1

535

E_NO_CERTIFICATE_FOUND = -49

536

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

537

538

# Types

539

class session_int(ctypes.Structure):

540

_fields_ = []

541

session_t = ctypes.POINTER(session_int)

542

543

class certificate_credentials_st(ctypes.Structure):

544

_fields_ = []

545

certificate_credentials_t = ctypes.POINTER(

546

certificate_credentials_st)

547

certificate_type_t = ctypes.c_int

548

549

class datum_t(ctypes.Structure):

550

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

551

('size', ctypes.c_uint)]

552

553

class openpgp_crt_int(ctypes.Structure):

554

_fields_ = []

555

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

556

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

557

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

558

credentials_type_t = ctypes.c_int

559

transport_ptr_t = ctypes.c_void_p

560

close_request_t = ctypes.c_int

561

562

# Exceptions

563

class Error(Exception):

564

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

565

# exception might be raised from within GnuTLS.__init__,

566

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

567

# global variable has happened.

568

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

569

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

570

# code is passed, convert it to a string with

571

# gnutls.strerror()

572

self.code = code

573

if message is None and code is not None:

574

message = GnuTLS.strerror(code)

575

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

576

message, *args)

577

578

class CertificateSecurityError(Error):

579

pass

580

581

# Classes

582

class Credentials(object):

583

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

587

self.type = gnutls.CRD_CERTIFICATE

588

589

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

591

592

class ClientSession(object):

593

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

594

self._c_object = gnutls.session_t()

595

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

596

gnutls.set_default_priority(self._c_object)

597

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

598

gnutls.handshake_set_private_extensions(self._c_object,

599

True)

600

self.socket = socket

601

if credentials is None:

602

credentials = gnutls.Credentials()

603

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

604

ctypes.cast(credentials._c_object,

605

ctypes.c_void_p))

606

self.credentials = credentials

607

608

def __del__(self):

609

gnutls.deinit(self._c_object)

610

611

def handshake(self):

612

return gnutls.handshake(self._c_object)

613

614

def send(self, data):

615

data = bytes(data)

616

data_len = len(data)

617

while data_len > 0:

618

data_len -= gnutls.record_send(self._c_object,

619

data[-data_len:],

620

data_len)

621

622

def bye(self):

623

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

624

625

# Error handling functions

626

def _error_code(result):

627

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

628

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

629

if result >= 0:

630

return result

631

if result == gnutls.E_NO_CERTIFICATE_FOUND:

632

raise gnutls.CertificateSecurityError(code=result)

633

raise gnutls.Error(code=result)

634

635

def _retry_on_error(result, func, arguments):

636

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

637

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

638

while result < 0:

639

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

640

return _error_code(result)

641

result = func(*arguments)

642

return result

643

644

# Unless otherwise indicated, the function declarations below are

645

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

646

647

# Functions

648

priority_set_direct = _library.gnutls_priority_set_direct

649

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

650

ctypes.POINTER(ctypes.c_char_p)]

651

priority_set_direct.restype = _error_code

652

653

init = _library.gnutls_init

654

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

655

init.restype = _error_code

656

657

set_default_priority = _library.gnutls_set_default_priority

658

set_default_priority.argtypes = [session_t]

659

set_default_priority.restype = _error_code

660

661

record_send = _library.gnutls_record_send

662

record_send.argtypes = [session_t, ctypes.c_void_p,

663

ctypes.c_size_t]

664

record_send.restype = ctypes.c_ssize_t

665

record_send.errcheck = _retry_on_error

666

667

certificate_allocate_credentials = (

668

_library.gnutls_certificate_allocate_credentials)

669

certificate_allocate_credentials.argtypes = [

670

ctypes.POINTER(certificate_credentials_t)]

671

certificate_allocate_credentials.restype = _error_code

672

673

certificate_free_credentials = (

674

_library.gnutls_certificate_free_credentials)

675

certificate_free_credentials.argtypes = [

676

certificate_credentials_t]

677

certificate_free_credentials.restype = None

678

679

handshake_set_private_extensions = (

680

_library.gnutls_handshake_set_private_extensions)

681

handshake_set_private_extensions.argtypes = [session_t,

682

ctypes.c_int]

683

handshake_set_private_extensions.restype = None

684

685

credentials_set = _library.gnutls_credentials_set

686

credentials_set.argtypes = [session_t, credentials_type_t,

687

ctypes.c_void_p]

688

credentials_set.restype = _error_code

689

690

strerror = _library.gnutls_strerror

691

strerror.argtypes = [ctypes.c_int]

692

strerror.restype = ctypes.c_char_p

693

694

certificate_type_get = _library.gnutls_certificate_type_get

695

certificate_type_get.argtypes = [session_t]

696

certificate_type_get.restype = _error_code

697

698

certificate_get_peers = _library.gnutls_certificate_get_peers

699

certificate_get_peers.argtypes = [session_t,

700

ctypes.POINTER(ctypes.c_uint)]

701

certificate_get_peers.restype = ctypes.POINTER(datum_t)

702

703

global_set_log_level = _library.gnutls_global_set_log_level

704

global_set_log_level.argtypes = [ctypes.c_int]

705

global_set_log_level.restype = None

706

707

global_set_log_function = _library.gnutls_global_set_log_function

708

global_set_log_function.argtypes = [log_func]

709

global_set_log_function.restype = None

710

711

deinit = _library.gnutls_deinit

712

deinit.argtypes = [session_t]

713

deinit.restype = None

714

715

handshake = _library.gnutls_handshake

716

handshake.argtypes = [session_t]

717

handshake.restype = _error_code

718

handshake.errcheck = _retry_on_error

719

720

transport_set_ptr = _library.gnutls_transport_set_ptr

721

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

722

transport_set_ptr.restype = None

723

724

bye = _library.gnutls_bye

725

bye.argtypes = [session_t, close_request_t]

726

bye.restype = _error_code

727

bye.errcheck = _retry_on_error

728

729

check_version = _library.gnutls_check_version

730

check_version.argtypes = [ctypes.c_char_p]

731

check_version.restype = ctypes.c_char_p

732

733

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

734

735

openpgp_crt_init = _library.gnutls_openpgp_crt_init

736

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

737

openpgp_crt_init.restype = _error_code

738

739

openpgp_crt_import = _library.gnutls_openpgp_crt_import

740

openpgp_crt_import.argtypes = [openpgp_crt_t,

741

ctypes.POINTER(datum_t),

742

openpgp_crt_fmt_t]

743

openpgp_crt_import.restype = _error_code

744

745

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

746

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

747

ctypes.POINTER(ctypes.c_uint)]

748

openpgp_crt_verify_self.restype = _error_code

749

750

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

751

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

752

openpgp_crt_deinit.restype = None

753

754

openpgp_crt_get_fingerprint = (

755

_library.gnutls_openpgp_crt_get_fingerprint)

756

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

757

ctypes.c_void_p,

758

ctypes.POINTER(

759

ctypes.c_size_t)]

760

openpgp_crt_get_fingerprint.restype = _error_code

761

762

# Remove non-public functions

763

del _error_code, _retry_on_error

764

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

765

gnutls = GnuTLS()

766

767

768

def call_pipe(connection, # : multiprocessing.Connection

769

func, *args, **kwargs):

770

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

771

772

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

773

return value on the provided multiprocessing.Connection.

774

"""

775

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

776

connection.close()

408

777

409

778

410

779

class Client(object):

411

780

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

412

781

413

782

Attributes:

414

783

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

415

784

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

417

786

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

418

787

to see if the client lives.

419

788

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

789

checker_callback_tag: a GLib event source tag, or None

421

790

checker_command: string; External command which is run to check

422

791

if client lives. %() expansions are done at

423

792

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

424

793

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

425

checker_initiator_tag: a gobject event source tag, or None

794

checker_initiator_tag: a GLib event source tag, or None

426

795

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

427

796

client_structure: Object describing what attributes a client has

428

797

and is used for storing the client at exit

429

798

current_checker_command: string; current running checker_command

430

disable_initiator_tag: a gobject event source tag, or None

799

disable_initiator_tag: a GLib event source tag, or None

431

800

enabled: bool()

432

801

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

433

802

uniquely identify the client

438

807

last_checker_status: integer between 0 and 255 reflecting exit

439

808

status of last checker. -1 reflects crashed

440

809

checker, -2 means no checker completed yet.

810

last_checker_signal: The signal which killed the last checker, if

811

last_checker_status is -1

441

812

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

442

813

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

443

814

D-Bus identifiers

450

821

disabled, or None

451

822

server_settings: The server_settings dict from main()

452

823

"""

453

824

454

825

runtime_expansions = ("approval_delay", "approval_duration",

455

826

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

456

827

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

457

828

"last_approval_request", "last_checked_ok",

458

829

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

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

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

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

469

470

def timeout_milliseconds(self):

471

"Return the 'timeout' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.timeout)

473

474

def extended_timeout_milliseconds(self):

475

"Return the 'extended_timeout' attribute in milliseconds"

476

return timedelta_to_milliseconds(self.extended_timeout)

477

478

def interval_milliseconds(self):

479

"Return the 'interval' attribute in milliseconds"

480

return timedelta_to_milliseconds(self.interval)

481

482

def approval_delay_milliseconds(self):

483

return timedelta_to_milliseconds(self.approval_delay)

484

830

client_defaults = {

831

"timeout": "PT5M",

832

"extended_timeout": "PT15M",

833

"interval": "PT2M",

834

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

835

"host": "",

836

"approval_delay": "PT0S",

837

"approval_duration": "PT1S",

838

"approved_by_default": "True",

839

"enabled": "True",

840

}

841

485

842

@staticmethod

486

843

def config_parser(config):

487

844

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

494

851

for client_name in config.sections():

495

852

section = dict(config.items(client_name))

496

853

client = settings[client_name] = {}

497

854

498

855

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

499

856

# Reformat values from string types to Python types

500

857

client["approved_by_default"] = config.getboolean(

501

858

client_name, "approved_by_default")

502

859

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

503

860

"enabled")

504

861

862

# Uppercase and remove spaces from fingerprint for later

863

# comparison purposes with return value from the

864

# fingerprint() function

505

865

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

506

866

.replace(" ", ""))

507

867

if "secret" in section:

508

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

868

client["secret"] = codecs.decode(section["secret"]

869

.encode("utf-8"),

870

"base64")

509

871

elif "secfile" in section:

510

872

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

511

873

(section["secfile"])),

512

874

"rb") as secfile:

513

875

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

514

876

else:

515

raise TypeError("No secret or secfile for section {0}"

877

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

516

878

.format(section))

517

879

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

518

880

client["extended_timeout"] = string_to_delta(

526

888

client["last_approval_request"] = None

527

889

client["last_checked_ok"] = None

528

890

client["last_checker_status"] = -2

529

891

530

892

return settings

531

532

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

893

894

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

533

895

self.name = name

534

896

if server_settings is None:

535

897

server_settings = {}

536

898

self.server_settings = server_settings

537

899

# adding all client settings

538

for setting, value in settings.iteritems():

900

for setting, value in settings.items():

539

901

setattr(self, setting, value)

540

902

541

903

if self.enabled:

542

904

if not hasattr(self, "last_enabled"):

543

905

self.last_enabled = datetime.datetime.utcnow()

547

909

else:

548

910

self.last_enabled = None

549

911

self.expires = None

550

912

551

913

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

552

# Uppercase and remove spaces from fingerprint for later

553

# comparison purposes with return value from the fingerprint()

554

# function

555

914

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

556

915

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

557

916

datetime.datetime.utcnow())

558

917

559

918

# attributes specific for this server instance

560

919

self.checker = None

561

920

self.checker_initiator_tag = None

564

923

self.current_checker_command = None

565

924

self.approved = None

566

925

self.approvals_pending = 0

567

self.changedstate = (multiprocessing_manager

568

.Condition(multiprocessing_manager

569

.Lock()))

570

self.client_structure = [attr for attr in

571

self.__dict__.iterkeys()

926

self.changedstate = multiprocessing_manager.Condition(

927

multiprocessing_manager.Lock())

928

self.client_structure = [attr

929

for attr in self.__dict__.keys()

572

930

if not attr.startswith("_")]

573

931

self.client_structure.append("client_structure")

574

575

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

576

lambda obj:

577

isinstance(obj,

578

property)):

932

933

for name, t in inspect.getmembers(

934

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

579

935

if not name.startswith("_"):

580

936

self.client_structure.append(name)

581

937

582

938

# Send notice to process children that client state has changed

583

939

def send_changedstate(self):

584

940

with self.changedstate:

585

941

self.changedstate.notify_all()

586

942

587

943

def enable(self):

588

944

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

589

945

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

594

950

self.last_enabled = datetime.datetime.utcnow()

595

951

self.init_checker()

596

952

self.send_changedstate()

597

953

598

954

def disable(self, quiet=True):

599

955

"""Disable this client."""

600

956

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

602

958

if not quiet:

603

959

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

604

960

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

605

gobject.source_remove(self.disable_initiator_tag)

961

GLib.source_remove(self.disable_initiator_tag)

606

962

self.disable_initiator_tag = None

607

963

self.expires = None

608

964

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

609

gobject.source_remove(self.checker_initiator_tag)

965

GLib.source_remove(self.checker_initiator_tag)

610

966

self.checker_initiator_tag = None

611

967

self.stop_checker()

612

968

self.enabled = False

613

969

if not quiet:

614

970

self.send_changedstate()

615

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

971

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

616

972

return False

617

973

618

974

def __del__(self):

619

975

self.disable()

620

976

621

977

def init_checker(self):

622

978

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

623

979

# and every interval from then on.

624

980

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

self.checker_initiator_tag = (gobject.timeout_add

627

(self.interval_milliseconds(),

628

self.start_checker))

981

GLib.source_remove(self.checker_initiator_tag)

982

self.checker_initiator_tag = GLib.timeout_add(

983

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

984

self.start_checker)

629

985

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

630

986

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

self.disable_initiator_tag = (gobject.timeout_add

633

(self.timeout_milliseconds(),

634

self.disable))

987

GLib.source_remove(self.disable_initiator_tag)

988

self.disable_initiator_tag = GLib.timeout_add(

989

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

635

990

# Also start a new checker *right now*.

636

991

self.start_checker()

637

638

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

992

993

def checker_callback(self, source, condition, connection,

994

command):

639

995

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

640

996

self.checker_callback_tag = None

641

997

self.checker = None

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

998

# Read return code from connection (see call_pipe)

999

returncode = connection.recv()

1000

connection.close()

1001

1002

if returncode >= 0:

1003

self.last_checker_status = returncode

1004

self.last_checker_signal = None

644

1005

if self.last_checker_status == 0:

645

1006

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

646

1007

vars(self))

647

1008

self.checked_ok()

648

1009

else:

649

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

650

vars(self))

1010

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

651

1011

else:

652

1012

self.last_checker_status = -1

1013

self.last_checker_signal = -returncode

653

1014

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

654

1015

vars(self))

655

1016

return False

1017

656

1018

def checked_ok(self):

657

1019

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

658

1020

self.last_checked_ok = datetime.datetime.utcnow()

659

1021

self.last_checker_status = 0

1022

self.last_checker_signal = None

660

1023

self.bump_timeout()

661

1024

662

1025

def bump_timeout(self, timeout=None):

663

1026

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

664

1027

if timeout is None:

665

1028

timeout = self.timeout

666

1029

if self.disable_initiator_tag is not None:

667

gobject.source_remove(self.disable_initiator_tag)

1030

GLib.source_remove(self.disable_initiator_tag)

668

1031

self.disable_initiator_tag = None

669

1032

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

1033

self.disable_initiator_tag = GLib.timeout_add(

1034

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

673

1035

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

674

1036

675

1037

def need_approval(self):

676

1038

self.last_approval_request = datetime.datetime.utcnow()

677

1039

678

1040

def start_checker(self):

679

1041

"""Start a new checker subprocess if one is not running.

680

1042

681

1043

If a checker already exists, leave it running and do

682

1044

nothing."""

683

1045

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

688

1050

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

689

1051

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

690

1052

# should be.

691

692

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

693

try:

694

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

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

700

else:

701

if pid:

702

logger.warning("Checker was a zombie")

703

gobject.source_remove(self.checker_callback_tag)

704

self.checker_callback(pid, status,

705

self.current_checker_command)

1053

1054

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

1055

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

1056

self.checker.join()

1057

self.checker = None

706

1058

# Start a new checker if needed

707

1059

if self.checker is None:

708

1060

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

1061

escaped_attrs = {

1062

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

1063

for attr in self.runtime_expansions}

713

1064

try:

714

1065

command = self.checker_command % escaped_attrs

715

1066

except TypeError as error:

716

1067

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

1068

self.checker_command,

1069

exc_info=error)

1070

return True # Try again later

719

1071

self.current_checker_command = command

720

try:

721

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

722

command, self.name)

723

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

724

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

725

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

726

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

735

self.checker = subprocess.Popen(command,

736

close_fds=True,

737

shell=True, cwd="/",

738

**popen_args)

739

except OSError as error:

740

logger.error("Failed to start subprocess",

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

750

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

751

except OSError as error:

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

761

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

1072

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

1073

self.name)

1074

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

1075

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

1076

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

1077

# always replaced by /dev/null.)

1078

# The exception is when not debugging but nevertheless

1079

# running in the foreground; use the previously

1080

# created wnull.

1081

popen_args = {"close_fds": True,

1082

"shell": True,

1083

"cwd": "/"}

1084

if (not self.server_settings["debug"]

1085

and self.server_settings["foreground"]):

1086

popen_args.update({"stdout": wnull,

1087

"stderr": wnull})

1088

pipe = multiprocessing.Pipe(duplex=False)

1089

self.checker = multiprocessing.Process(

1090

target=call_pipe,

1091

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

1092

kwargs=popen_args)

1093

self.checker.start()

1094

self.checker_callback_tag = GLib.io_add_watch(

1095

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

1096

self.checker_callback, pipe[0], command)

1097

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

762

1098

return True

763

1099

764

1100

def stop_checker(self):

765

1101

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

766

1102

if self.checker_callback_tag:

767

gobject.source_remove(self.checker_callback_tag)

1103

GLib.source_remove(self.checker_callback_tag)

768

1104

self.checker_callback_tag = None

769

1105

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

770

1106

return

771

1107

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

772

try:

773

self.checker.terminate()

774

#time.sleep(0.5)

775

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

776

# self.checker.kill()

777

except OSError as error:

778

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

779

raise

1108

self.checker.terminate()

780

1109

self.checker = None

781

1110

782

1111

783

def dbus_service_property(dbus_interface, signature="v",

784

access="readwrite", byte_arrays=False):

1112

def dbus_service_property(dbus_interface,

1113

signature="v",

1114

access="readwrite",

1115

byte_arrays=False):

785

1116

"""Decorators for marking methods of a DBusObjectWithProperties to

786

1117

become properties on the D-Bus.

787

1118

788

1119

The decorated method will be called with no arguments by "Get"

789

1120

and with one argument by "Set".

790

1121

791

1122

The parameters, where they are supported, are the same as

792

1123

dbus.service.method, except there is only "signature", since the

793

1124

type from Get() and the type sent to Set() is the same.

796

1127

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

797

1128

if byte_arrays and signature != "ay":

798

1129

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

799

" signature {0!r}".format(signature))

1130

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

1131

800

1132

def decorator(func):

801

1133

func._dbus_is_property = True

802

1134

func._dbus_interface = dbus_interface

805

1137

func._dbus_name = func.__name__

806

1138

if func._dbus_name.endswith("_dbus_property"):

807

1139

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

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1140

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

809

1141

return func

1142

810

1143

return decorator

811

1144

812

1145

813

1146

def dbus_interface_annotations(dbus_interface):

814

1147

"""Decorator for marking functions returning interface annotations

815

1148

816

1149

Usage:

817

1150

818

1151

@dbus_interface_annotations("org.example.Interface")

819

1152

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

820

1153

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

821

1154

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

822

1155

"false"}

823

1156

"""

1157

824

1158

def decorator(func):

825

1159

func._dbus_is_interface = True

826

1160

func._dbus_interface = dbus_interface

827

1161

func._dbus_name = dbus_interface

828

1162

return func

1163

829

1164

return decorator

830

1165

831

1166

832

1167

def dbus_annotations(annotations):

833

1168

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

834

1169

Usage:

835

1170

1171

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

1172

"org.freedesktop.DBus.Property."

1173

"EmitsChangedSignal": "false"})

836

1174

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

837

1175

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

1176

def Property_dbus_property(self):

842

1177

return dbus.Boolean(False)

1178

1179

See also the DBusObjectWithAnnotations class.

843

1180

"""

1181

844

1182

def decorator(func):

845

1183

func._dbus_annotations = annotations

846

1184

return func

1185

847

1186

return decorator

848

1187

849

1188

850

1189

class DBusPropertyException(dbus.exceptions.DBusException):

851

1190

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

852

1191

"""

853

def __unicode__(self):

854

return unicode(str(self))

1192

pass

855

1193

856

1194

857

1195

class DBusPropertyAccessException(DBusPropertyException):

866

1204

pass

867

1205

868

1206

869

class DBusObjectWithProperties(dbus.service.Object):

870

"""A D-Bus object with properties.

871

872

Classes inheriting from this can use the dbus_service_property

873

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

874

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

1207

class DBusObjectWithAnnotations(dbus.service.Object):

1208

"""A D-Bus object with annotations.

1209

1210

Classes inheriting from this can use the dbus_annotations

1211

decorator to add annotations to methods or signals.

875

1212

"""

876

1213

877

1214

@staticmethod

878

1215

def _is_dbus_thing(thing):

879

1216

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

880

1217

881

1218

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

882

1219

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

883

1220

"""

884

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

1221

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

885

1222

False)

886

1223

887

1224

def _get_all_dbus_things(self, thing):

888

1225

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

889

1226

"""

890

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

891

name),

1227

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

892

1228

athing.__get__(self))

893

1229

for cls in self.__class__.__mro__

894

1230

for name, athing in

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

897

1231

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

1232

1233

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1234

out_signature="s",

1235

path_keyword='object_path',

1236

connection_keyword='connection')

1237

def Introspect(self, object_path, connection):

1238

"""Overloading of standard D-Bus method.

1239

1240

Inserts annotation tags on methods and signals.

1241

"""

1242

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

1243

connection)

1244

try:

1245

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

1246

1247

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

1248

# Add annotation tags

1249

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

1250

for tag in if_tag.getElementsByTagName(typ):

1251

annots = dict()

1252

for name, prop in (self.

1253

_get_all_dbus_things(typ)):

1254

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

1255

and prop._dbus_interface

1256

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

1257

annots.update(getattr(

1258

prop, "_dbus_annotations", {}))

1259

for name, value in annots.items():

1260

ann_tag = document.createElement(

1261

"annotation")

1262

ann_tag.setAttribute("name", name)

1263

ann_tag.setAttribute("value", value)

1264

tag.appendChild(ann_tag)

1265

# Add interface annotation tags

1266

for annotation, value in dict(

1267

itertools.chain.from_iterable(

1268

annotations().items()

1269

for name, annotations

1270

in self._get_all_dbus_things("interface")

1271

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

1272

)).items():

1273

ann_tag = document.createElement("annotation")

1274

ann_tag.setAttribute("name", annotation)

1275

ann_tag.setAttribute("value", value)

1276

if_tag.appendChild(ann_tag)

1277

# Fix argument name for the Introspect method itself

1278

if (if_tag.getAttribute("name")

1279

== dbus.INTROSPECTABLE_IFACE):

1280

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

1281

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

1282

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

1283

if (arg.getAttribute("direction")

1284

== "out"):

1285

arg.setAttribute("name",

1286

"xml_data")

1287

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

1288

document.unlink()

1289

except (AttributeError, xml.dom.DOMException,

1290

xml.parsers.expat.ExpatError) as error:

1291

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

1292

exc_info=error)

1293

return xmlstring

1294

1295

1296

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1297

"""A D-Bus object with properties.

1298

1299

Classes inheriting from this can use the dbus_service_property

1300

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

1301

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

1302

"""

1303

898

1304

def _get_dbus_property(self, interface_name, property_name):

899

1305

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

900

1306

property with the specified name and interface.

901

1307

"""

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

1308

for cls in self.__class__.__mro__:

1309

for name, value in inspect.getmembers(

1310

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

906

1311

if (value._dbus_name == property_name

907

1312

and value._dbus_interface == interface_name):

908

1313

return value.__get__(self)

909

1314

910

1315

# No such property

911

raise DBusPropertyNotFound(self.dbus_object_path + ":"

912

+ interface_name + "."

913

+ property_name)

914

915

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

1316

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

1317

self.dbus_object_path, interface_name, property_name))

1318

1319

@classmethod

1320

def _get_all_interface_names(cls):

1321

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

1322

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

1323

"_dbus_interface", None)

1324

for x in (inspect.getmro(cls))

1325

for attr in dir(x))

1326

if name is not None)

1327

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="ss",

916

1330

out_signature="v")

917

1331

def Get(self, interface_name, property_name):

918

1332

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

924

1338

if not hasattr(value, "variant_level"):

925

1339

return value

926

1340

return type(value)(value, variant_level=value.variant_level+1)

927

1341

928

1342

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

929

1343

def Set(self, interface_name, property_name, value):

930

1344

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

937

1351

# signatures other than "ay".

938

1352

if prop._dbus_signature != "ay":

939

1353

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

940

"'ay' signature {0!r}"

1354

"'ay' signature {!r}"

941

1355

.format(prop._dbus_signature))

942

1356

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

943

1357

for byte in value))

944

1358

prop(value)

945

946

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

1359

1360

@dbus.service.method(dbus.PROPERTIES_IFACE,

1361

in_signature="s",

947

1362

out_signature="a{sv}")

948

1363

def GetAll(self, interface_name):

949

1364

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

950

1365

standard.

951

1366

952

1367

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

953

1368

"""

954

1369

properties = {}

964

1379

if not hasattr(value, "variant_level"):

965

1380

properties[name] = value

966

1381

continue

967

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

968

value.variant_level+1)

1382

properties[name] = type(value)(

1383

value, variant_level=value.variant_level + 1)

969

1384

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

970

1385

1386

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

1387

def PropertiesChanged(self, interface_name, changed_properties,

1388

invalidated_properties):

1389

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

1390

standard.

1391

"""

1392

pass

1393

971

1394

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

972

1395

out_signature="s",

973

1396

path_keyword='object_path',

974

1397

connection_keyword='connection')

975

1398

def Introspect(self, object_path, connection):

976

1399

"""Overloading of standard D-Bus method.

977

1400

978

1401

Inserts property tags and interface annotation tags.

979

1402

"""

980

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

981

connection)

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

982

1406

try:

983

1407

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

1408

984

1409

def make_tag(document, name, prop):

985

1410

e = document.createElement("property")

986

1411

e.setAttribute("name", name)

987

1412

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

988

1413

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

989

1414

return e

1415

990

1416

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

991

1417

# Add property tags

992

1418

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

995

1421

if prop._dbus_interface

996

1422

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

997

1423

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr

1008

(prop,

1009

"_dbus_annotations",

1010

{}))

1011

for name, value in annots.iteritems():

1012

ann_tag = document.createElement(

1013

"annotation")

1014

ann_tag.setAttribute("name", name)

1015

ann_tag.setAttribute("value", value)

1016

tag.appendChild(ann_tag)

1017

# Add interface annotation tags

1018

for annotation, value in dict(

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

1025

ann_tag = document.createElement("annotation")

1026

ann_tag.setAttribute("name", annotation)

1027

ann_tag.setAttribute("value", value)

1028

if_tag.appendChild(ann_tag)

1424

# Add annotation tags for properties

1425

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

1426

annots = dict()

1427

for name, prop in self._get_all_dbus_things(

1428

"property"):

1429

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

1430

and prop._dbus_interface

1431

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

1432

annots.update(getattr(

1433

prop, "_dbus_annotations", {}))

1434

for name, value in annots.items():

1435

ann_tag = document.createElement(

1436

"annotation")

1437

ann_tag.setAttribute("name", name)

1438

ann_tag.setAttribute("value", value)

1439

tag.appendChild(ann_tag)

1029

1440

# Add the names to the return values for the

1030

1441

# "org.freedesktop.DBus.Properties" methods

1031

1442

if (if_tag.getAttribute("name")

1049

1460

exc_info=error)

1050

1461

return xmlstring

1051

1462

1463

try:

1464

dbus.OBJECT_MANAGER_IFACE

1465

except AttributeError:

1466

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

1467

1468

1469

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1470

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

1471

1472

Classes inheriting from this exposes the standard

1473

GetManagedObjects call and the InterfacesAdded and

1474

InterfacesRemoved signals on the standard

1475

"org.freedesktop.DBus.ObjectManager" interface.

1476

1477

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

1478

manually.

1479

"""

1480

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1481

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

1482

def GetManagedObjects(self):

1483

"""This function must be overridden"""

1484

raise NotImplementedError()

1485

1486

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1487

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

1488

def InterfacesAdded(self, object_path, interfaces_and_properties):

1489

pass

1490

1491

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

1492

def InterfacesRemoved(self, object_path, interfaces):

1493

pass

1494

1495

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1496

out_signature="s",

1497

path_keyword='object_path',

1498

connection_keyword='connection')

1499

def Introspect(self, object_path, connection):

1500

"""Overloading of standard D-Bus method.

1501

1502

Override return argument name of GetManagedObjects to be

1503

"objpath_interfaces_and_properties"

1504

"""

1505

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1506

object_path,

1507

connection)

1508

try:

1509

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

1510

1511

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

1512

# Fix argument name for the GetManagedObjects method

1513

if (if_tag.getAttribute("name")

1514

== dbus.OBJECT_MANAGER_IFACE):

1515

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

1516

if (cn.getAttribute("name")

1517

== "GetManagedObjects"):

1518

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

1519

if (arg.getAttribute("direction")

1520

== "out"):

1521

arg.setAttribute(

1522

"name",

1523

"objpath_interfaces"

1524

"_and_properties")

1525

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

1526

document.unlink()

1527

except (AttributeError, xml.dom.DOMException,

1528

xml.parsers.expat.ExpatError) as error:

1529

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

1530

exc_info=error)

1531

return xmlstring

1532

1052

1533

1053

1534

def datetime_to_dbus(dt, variant_level=0):

1054

1535

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

1055

1536

if dt is None:

1056

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

1057

return dbus.String(dt.isoformat(),

1058

variant_level=variant_level)

1537

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

1538

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

1059

1539

1060

1540

1061

1541

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1063

1543

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

1064

1544

interface names according to the "alt_interface_names" mapping.

1065

1545

Usage:

1066

1546

1067

1547

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

1068

1548

"net.example.AlternateInterface"})

1069

1549

class SampleDBusObject(dbus.service.Object):

1070

1550

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

1071

1551

def SampleDBusMethod():

1072

1552

pass

1073

1553

1074

1554

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

1555

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

1076

1556

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

1077

1557

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

1078

1558

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

1079

1559

1080

1560

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

1081

1561

(from DBusObjectWithProperties) and interfaces (from the

1082

1562

dbus_interface_annotations decorator).

1083

1563

"""

1564

1084

1565

def wrapper(cls):

1085

1566

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1567

alt_interface_names.items()):

1087

1568

attr = {}

1088

1569

interface_names = set()

1089

1570

# Go though all attributes of the class

1091

1572

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

1092

1573

# with the wrong interface name

1093

1574

if (not hasattr(attribute, "_dbus_interface")

1094

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

1575

or not attribute._dbus_interface.startswith(

1576

orig_interface_name)):

1096

1577

continue

1097

1578

# Create an alternate D-Bus interface name based on

1098

1579

# the current name

1099

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1580

alt_interface = attribute._dbus_interface.replace(

1581

orig_interface_name, alt_interface_name)

1102

1582

interface_names.add(alt_interface)

1103

1583

# Is this a D-Bus signal?

1104

1584

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

1105

1585

# Extract the original non-method undecorated

1106

1586

# function by black magic

1107

nonmethod_func = (dict(

1587

if sys.version_info.major == 2:

1588

nonmethod_func = (dict(

1108

1589

zip(attribute.func_code.co_freevars,

1109

attribute.__closure__))["func"]

1110

.cell_contents)

1590

attribute.__closure__))

1591

["func"].cell_contents)

1592

else:

1593

nonmethod_func = (dict(

1594

zip(attribute.__code__.co_freevars,

1595

attribute.__closure__))

1596

["func"].cell_contents)

1111

1597

# Create a new, but exactly alike, function

1112

1598

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

1113

1599

# with the alternate D-Bus interface name

1114

new_function = (dbus.service.signal

1115

(alt_interface,

1116

attribute._dbus_signature)

1117

(types.FunctionType(

1118

nonmethod_func.func_code,

1119

nonmethod_func.func_globals,

1120

nonmethod_func.func_name,

1121

nonmethod_func.func_defaults,

1122

nonmethod_func.func_closure)))

1600

new_function = copy_function(nonmethod_func)

1601

new_function = (dbus.service.signal(

1602

alt_interface,

1603

attribute._dbus_signature)(new_function))

1123

1604

# Copy annotations, if any

1124

1605

try:

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1606

new_function._dbus_annotations = dict(

1607

attribute._dbus_annotations)

1127

1608

except AttributeError:

1128

1609

pass

1610

1129

1611

# Define a creator of a function to call both the

1130

1612

# original and alternate functions, so both the

1131

1613

# original and alternate signals gets sent when

1134

1616

"""This function is a scope container to pass

1135

1617

func1 and func2 to the "call_both" function

1136

1618

outside of its arguments"""

1619

1620

@functools.wraps(func2)

1137

1621

def call_both(*args, **kwargs):

1138

1622

"""This function will emit two D-Bus

1139

1623

signals by calling func1 and func2"""

1140

1624

func1(*args, **kwargs)

1141

1625

func2(*args, **kwargs)

1626

# Make wrapper function look like a D-Bus

1627

# signal

1628

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

1629

if name.startswith("_dbus_"):

1630

setattr(call_both, name, attr)

1631

1142

1632

return call_both

1143

1633

# Create the "call_both" function and add it to

1144

1634

# the class

1149

1639

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

1150

1640

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

1151

1641

# to the class.

1152

attr[attrname] = (dbus.service.method

1153

(alt_interface,

1154

attribute._dbus_in_signature,

1155

attribute._dbus_out_signature)

1156

(types.FunctionType

1157

(attribute.func_code,

1158

attribute.func_globals,

1159

attribute.func_name,

1160

attribute.func_defaults,

1161

attribute.func_closure)))

1642

attr[attrname] = (

1643

dbus.service.method(

1644

alt_interface,

1645

attribute._dbus_in_signature,

1646

attribute._dbus_out_signature)

1647

(copy_function(attribute)))

1162

1648

# Copy annotations, if any

1163

1649

try:

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1650

attr[attrname]._dbus_annotations = dict(

1651

attribute._dbus_annotations)

1166

1652

except AttributeError:

1167

1653

pass

1168

1654

# Is this a D-Bus property?

1171

1657

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

1172

1658

# property with the alternate D-Bus interface

1173

1659

# name. Add it to the class.

1174

attr[attrname] = (dbus_service_property

1175

(alt_interface,

1176

attribute._dbus_signature,

1177

attribute._dbus_access,

1178

attribute

1179

._dbus_get_args_options

1180

["byte_arrays"])

1181

(types.FunctionType

1182

(attribute.func_code,

1183

attribute.func_globals,

1184

attribute.func_name,

1185

attribute.func_defaults,

1186

attribute.func_closure)))

1660

attr[attrname] = (dbus_service_property(

1661

alt_interface, attribute._dbus_signature,

1662

attribute._dbus_access,

1663

attribute._dbus_get_args_options

1664

["byte_arrays"])

1665

(copy_function(attribute)))

1187

1666

# Copy annotations, if any

1188

1667

try:

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1668

attr[attrname]._dbus_annotations = dict(

1669

attribute._dbus_annotations)

1191

1670

except AttributeError:

1192

1671

pass

1193

1672

# Is this a D-Bus interface?

1196

1675

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

1197

1676

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

1198

1677

# to the class.

1199

attr[attrname] = (dbus_interface_annotations

1200

(alt_interface)

1201

(types.FunctionType

1202

(attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1678

attr[attrname] = (

1679

dbus_interface_annotations(alt_interface)

1680

(copy_function(attribute)))

1207

1681

if deprecate:

1208

1682

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1683

iname = "_AlternateDBusNames_interface_annotation{}"

1210

1684

for interface_name in interface_names:

1685

1211

1686

@dbus_interface_annotations(interface_name)

1212

1687

def func(self):

1213

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

1214

"true" }

1688

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

1689

"true"}

1215

1690

# Find an unused name

1216

1691

for aname in (iname.format(i)

1217

1692

for i in itertools.count()):

1221

1696

if interface_names:

1222

1697

# Replace the class with a new subclass of it with

1223

1698

# methods, signals, etc. as created above.

1224

cls = type(b"{0}Alternate".format(cls.__name__),

1225

(cls,), attr)

1699

if sys.version_info.major == 2:

1700

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

1701

(cls, ), attr)

1702

else:

1703

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

1704

(cls, ), attr)

1226

1705

return cls

1706

1227

1707

return wrapper

1228

1708

1229

1709

1230

1710

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

1231

"se.bsnet.fukt.Mandos"})

1711

"se.bsnet.fukt.Mandos"})

1232

1712

class ClientDBus(Client, DBusObjectWithProperties):

1233

1713

"""A Client class using D-Bus

1234

1714

1235

1715

Attributes:

1236

1716

dbus_object_path: dbus.ObjectPath

1237

1717

bus: dbus.SystemBus()

1238

1718

"""

1239

1719

1240

1720

runtime_expansions = (Client.runtime_expansions

1241

+ ("dbus_object_path",))

1242

1721

+ ("dbus_object_path", ))

1722

1723

_interface = "se.recompile.Mandos.Client"

1724

1243

1725

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

1244

1245

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

1726

1727

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

1246

1728

self.bus = bus

1247

1729

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

1248

1730

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

1249

1731

# the D-Bus

1250

client_object_name = unicode(self.name).translate(

1732

client_object_name = str(self.name).translate(

1251

1733

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

1252

1734

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

1253

self.dbus_object_path = (dbus.ObjectPath

1254

("/clients/" + client_object_name))

1735

self.dbus_object_path = dbus.ObjectPath(

1736

"/clients/" + client_object_name)

1255

1737

DBusObjectWithProperties.__init__(self, self.bus,

1256

1738

self.dbus_object_path)

1257

1258

def notifychangeproperty(transform_func,

1259

dbus_name, type_func=lambda x: x,

1260

variant_level=1):

1739

1740

def notifychangeproperty(transform_func, dbus_name,

1741

type_func=lambda x: x,

1742

variant_level=1,

1743

invalidate_only=False,

1744

_interface=_interface):

1261

1745

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

1262

1746

its changes to DBus.

1263

1747

1264

1748

transform_fun: Function that takes a value and a variant_level

1265

1749

and transforms it to a D-Bus type.

1266

1750

dbus_name: D-Bus name of the variable

1268

1752

to the D-Bus. Default: no transform

1269

1753

variant_level: D-Bus variant level. Default: 1

1270

1754

"""

1271

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

1755

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

1756

1272

1757

def setter(self, value):

1273

1758

if hasattr(self, "dbus_object_path"):

1274

1759

if (not hasattr(self, attrname) or

1275

1760

type_func(getattr(self, attrname, None))

1276

1761

!= type_func(value)):

1277

dbus_value = transform_func(type_func(value),

1278

variant_level

1279

=variant_level)

1280

self.PropertyChanged(dbus.String(dbus_name),

1281

dbus_value)

1762

if invalidate_only:

1763

self.PropertiesChanged(

1764

_interface, dbus.Dictionary(),

1765

dbus.Array((dbus_name, )))

1766

else:

1767

dbus_value = transform_func(

1768

type_func(value),

1769

variant_level=variant_level)

1770

self.PropertyChanged(dbus.String(dbus_name),

1771

dbus_value)

1772

self.PropertiesChanged(

1773

_interface,

1774

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

1775

dbus_value}),

1776

dbus.Array())

1282

1777

setattr(self, attrname, value)

1283

1778

1284

1779

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

1285

1780

1286

1781

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1287

1782

approvals_pending = notifychangeproperty(dbus.Boolean,

1288

1783

"ApprovalPending",

1289

type_func = bool)

1784

type_func=bool)

1290

1785

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

1291

1786

last_enabled = notifychangeproperty(datetime_to_dbus,

1292

1787

"LastEnabled")

1293

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

1294

type_func = lambda checker:

1295

checker is not None)

1788

checker = notifychangeproperty(

1789

dbus.Boolean, "CheckerRunning",

1790

type_func=lambda checker: checker is not None)

1296

1791

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1297

1792

"LastCheckedOK")

1298

1793

last_checker_status = notifychangeproperty(dbus.Int16,

1301

1796

datetime_to_dbus, "LastApprovalRequest")

1302

1797

approved_by_default = notifychangeproperty(dbus.Boolean,

1303

1798

"ApprovedByDefault")

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1305

"ApprovalDelay",

1306

type_func =

1307

timedelta_to_milliseconds)

1799

approval_delay = notifychangeproperty(

1800

dbus.UInt64, "ApprovalDelay",

1801

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

1308

1802

approval_duration = notifychangeproperty(

1309

1803

dbus.UInt64, "ApprovalDuration",

1310

type_func = timedelta_to_milliseconds)

1804

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

1311

1805

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

1312

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1313

type_func =

1314

timedelta_to_milliseconds)

1806

timeout = notifychangeproperty(

1807

dbus.UInt64, "Timeout",

1808

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

1315

1809

extended_timeout = notifychangeproperty(

1316

1810

dbus.UInt64, "ExtendedTimeout",

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

timedelta_to_milliseconds)

1811

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

1812

interval = notifychangeproperty(

1813

dbus.UInt64, "Interval",

1814

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

1322

1815

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

1323

1816

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

1817

invalidate_only=True)

1818

1324

1819

del notifychangeproperty

1325

1820

1326

1821

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

1327

1822

try:

1328

1823

self.remove_from_connection()

1331

1826

if hasattr(DBusObjectWithProperties, "__del__"):

1332

1827

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

1333

1828

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

1334

1335

def checker_callback(self, pid, condition, command,

1336

*args, **kwargs):

1337

self.checker_callback_tag = None

1338

self.checker = None

1339

if os.WIFEXITED(condition):

1340

exitstatus = os.WEXITSTATUS(condition)

1829

1830

def checker_callback(self, source, condition,

1831

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

1832

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

1833

connection, command, *args,

1834

**kwargs)

1835

exitstatus = self.last_checker_status

1836

if exitstatus >= 0:

1341

1837

# Emit D-Bus signal

1342

1838

self.CheckerCompleted(dbus.Int16(exitstatus),

1343

dbus.Int64(condition),

1839

# This is specific to GNU libC

1840

dbus.Int64(exitstatus << 8),

1344

1841

dbus.String(command))

1345

1842

else:

1346

1843

# Emit D-Bus signal

1347

1844

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

1348

dbus.Int64(condition),

1845

dbus.Int64(

1846

# This is specific to GNU libC

1847

(exitstatus << 8)

1848

| self.last_checker_signal),

1349

1849

dbus.String(command))

1350

1351

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

1352

*args, **kwargs)

1353

1850

return ret

1851

1354

1852

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

1355

1853

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

1356

1854

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

1360

1858

# Emit D-Bus signal

1361

1859

self.CheckerStarted(self.current_checker_command)

1362

1860

return r

1363

1861

1364

1862

def _reset_approved(self):

1365

1863

self.approved = None

1366

1864

return False

1367

1865

1368

1866

def approve(self, value=True):

1369

1867

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1868

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

1869

* 1000), self._reset_approved)

1373

1870

self.send_changedstate()

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1871

1872

# D-Bus methods, signals & properties

1873

1874

# Interfaces

1875

1876

# Signals

1877

1387

1878

# CheckerCompleted - signal

1388

1879

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

1389

1880

def CheckerCompleted(self, exitcode, waitstatus, command):

1390

1881

"D-Bus signal"

1391

1882

pass

1392

1883

1393

1884

# CheckerStarted - signal

1394

1885

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

1395

1886

def CheckerStarted(self, command):

1396

1887

"D-Bus signal"

1397

1888

pass

1398

1889

1399

1890

# PropertyChanged - signal

1891

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

1400

1892

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

1401

1893

def PropertyChanged(self, property, value):

1402

1894

"D-Bus signal"

1403

1895

pass

1404

1896

1405

1897

# GotSecret - signal

1406

1898

@dbus.service.signal(_interface)

1407

1899

def GotSecret(self):

1410

1902

server to mandos-client

1411

1903

"""

1412

1904

pass

1413

1905

1414

1906

# Rejected - signal

1415

1907

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

1416

1908

def Rejected(self, reason):

1417

1909

"D-Bus signal"

1418

1910

pass

1419

1911

1420

1912

# NeedApproval - signal

1421

1913

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

1422

1914

def NeedApproval(self, timeout, default):

1423

1915

"D-Bus signal"

1424

1916

return self.need_approval()

1425

1426

## Methods

1427

1917

1918

# Methods

1919

1428

1920

# Approve - method

1429

1921

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

1430

1922

def Approve(self, value):

1431

1923

self.approve(value)

1432

1924

1433

1925

# CheckedOK - method

1434

1926

@dbus.service.method(_interface)

1435

1927

def CheckedOK(self):

1436

1928

self.checked_ok()

1437

1929

1438

1930

# Enable - method

1931

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

1439

1932

@dbus.service.method(_interface)

1440

1933

def Enable(self):

1441

1934

"D-Bus method"

1442

1935

self.enable()

1443

1936

1444

1937

# StartChecker - method

1938

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

1445

1939

@dbus.service.method(_interface)

1446

1940

def StartChecker(self):

1447

1941

"D-Bus method"

1448

1942

self.start_checker()

1449

1943

1450

1944

# Disable - method

1945

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

1451

1946

@dbus.service.method(_interface)

1452

1947

def Disable(self):

1453

1948

"D-Bus method"

1454

1949

self.disable()

1455

1950

1456

1951

# StopChecker - method

1952

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

1457

1953

@dbus.service.method(_interface)

1458

1954

def StopChecker(self):

1459

1955

self.stop_checker()

1460

1461

## Properties

1462

1956

1957

# Properties

1958

1463

1959

# ApprovalPending - property

1464

1960

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

1465

1961

def ApprovalPending_dbus_property(self):

1466

1962

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

1467

1963

1468

1964

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

1965

@dbus_service_property(_interface,

1966

signature="b",

1470

1967

access="readwrite")

1471

1968

def ApprovedByDefault_dbus_property(self, value=None):

1472

1969

if value is None: # get

1473

1970

return dbus.Boolean(self.approved_by_default)

1474

1971

self.approved_by_default = bool(value)

1475

1972

1476

1973

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

1974

@dbus_service_property(_interface,

1975

signature="t",

1478

1976

access="readwrite")

1479

1977

def ApprovalDelay_dbus_property(self, value=None):

1480

1978

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1979

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

1980

* 1000)

1482

1981

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

1483

1982

1484

1983

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

1984

@dbus_service_property(_interface,

1985

signature="t",

1486

1986

access="readwrite")

1487

1987

def ApprovalDuration_dbus_property(self, value=None):

1488

1988

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1989

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

1990

* 1000)

1491

1991

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

1492

1992

1493

1993

# Name - property

1994

@dbus_annotations(

1995

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

1494

1996

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

1495

1997

def Name_dbus_property(self):

1496

1998

return dbus.String(self.name)

1497

1999

1498

2000

# Fingerprint - property

2001

@dbus_annotations(

2002

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

1499

2003

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

1500

2004

def Fingerprint_dbus_property(self):

1501

2005

return dbus.String(self.fingerprint)

1502

2006

1503

2007

# Host - property

1504

@dbus_service_property(_interface, signature="s",

2008

@dbus_service_property(_interface,

2009

signature="s",

1505

2010

access="readwrite")

1506

2011

def Host_dbus_property(self, value=None):

1507

2012

if value is None: # get

1508

2013

return dbus.String(self.host)

1509

self.host = unicode(value)

1510

2014

self.host = str(value)

2015

1511

2016

# Created - property

2017

@dbus_annotations(

2018

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

1512

2019

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

1513

2020

def Created_dbus_property(self):

1514

2021

return datetime_to_dbus(self.created)

1515

2022

1516

2023

# LastEnabled - property

1517

2024

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

1518

2025

def LastEnabled_dbus_property(self):

1519

2026

return datetime_to_dbus(self.last_enabled)

1520

2027

1521

2028

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

2029

@dbus_service_property(_interface,

2030

signature="b",

1523

2031

access="readwrite")

1524

2032

def Enabled_dbus_property(self, value=None):

1525

2033

if value is None: # get

1528

2036

self.enable()

1529

2037

else:

1530

2038

self.disable()

1531

2039

1532

2040

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2041

@dbus_service_property(_interface,

2042

signature="s",

1534

2043

access="readwrite")

1535

2044

def LastCheckedOK_dbus_property(self, value=None):

1536

2045

if value is not None:

1537

2046

self.checked_ok()

1538

2047

return

1539

2048

return datetime_to_dbus(self.last_checked_ok)

1540

2049

1541

2050

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2051

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

1544

2052

def LastCheckerStatus_dbus_property(self):

1545

2053

return dbus.Int16(self.last_checker_status)

1546

2054

1547

2055

# Expires - property

1548

2056

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

1549

2057

def Expires_dbus_property(self):

1550

2058

return datetime_to_dbus(self.expires)

1551

2059

1552

2060

# LastApprovalRequest - property

1553

2061

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

1554

2062

def LastApprovalRequest_dbus_property(self):

1555

2063

return datetime_to_dbus(self.last_approval_request)

1556

2064

1557

2065

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2066

@dbus_service_property(_interface,

2067

signature="t",

1559

2068

access="readwrite")

1560

2069

def Timeout_dbus_property(self, value=None):

1561

2070

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2071

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

1563

2072

old_timeout = self.timeout

1564

2073

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

1565

2074

# Reschedule disabling

1573

2082

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

1574

2083

is None):

1575

2084

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

2085

GLib.source_remove(self.disable_initiator_tag)

2086

self.disable_initiator_tag = GLib.timeout_add(

2087

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

2088

self.disable)

2089

1582

2090

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2091

@dbus_service_property(_interface,

2092

signature="t",

1584

2093

access="readwrite")

1585

2094

def ExtendedTimeout_dbus_property(self, value=None):

1586

2095

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2096

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

2097

* 1000)

1588

2098

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

1589

2099

1590

2100

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2101

@dbus_service_property(_interface,

2102

signature="t",

1592

2103

access="readwrite")

1593

2104

def Interval_dbus_property(self, value=None):

1594

2105

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2106

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

1596

2107

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

1597

2108

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

1598

2109

return

1599

2110

if self.enabled:

1600

2111

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

2112

GLib.source_remove(self.checker_initiator_tag)

2113

self.checker_initiator_tag = GLib.timeout_add(

2114

value, self.start_checker)

2115

self.start_checker() # Start one now, too

2116

1606

2117

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2118

@dbus_service_property(_interface,

2119

signature="s",

1608

2120

access="readwrite")

1609

2121

def Checker_dbus_property(self, value=None):

1610

2122

if value is None: # get

1611

2123

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1613

2124

self.checker_command = str(value)

2125

1614

2126

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2127

@dbus_service_property(_interface,

2128

signature="b",

1616

2129

access="readwrite")

1617

2130

def CheckerRunning_dbus_property(self, value=None):

1618

2131

if value is None: # get

1621

2134

self.start_checker()

1622

2135

else:

1623

2136

self.stop_checker()

1624

2137

1625

2138

# ObjectPath - property

2139

@dbus_annotations(

2140

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

2141

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

1626

2142

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

1627

2143

def ObjectPath_dbus_property(self):

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2144

return self.dbus_object_path # is already a dbus.ObjectPath

2145

1630

2146

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2147

@dbus_annotations(

2148

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

2149

"invalidates"})

2150

@dbus_service_property(_interface,

2151

signature="ay",

2152

access="write",

2153

byte_arrays=True)

1633

2154

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1635

2155

self.secret = bytes(value)

2156

1636

2157

del _interface

1637

2158

1638

2159

1641

2162

self._pipe = child_pipe

1642

2163

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

1643

2164

if not self._pipe.recv():

1644

raise KeyError()

1645

2165

raise KeyError(fpr)

2166

1646

2167

def __getattribute__(self, name):

1647

2168

if name == '_pipe':

1648

2169

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

1651

2172

if data[0] == 'data':

1652

2173

return data[1]

1653

2174

if data[0] == 'function':

2175

1654

2176

def func(*args, **kwargs):

1655

2177

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

1656

2178

return self._pipe.recv()[1]

2179

1657

2180

return func

1658

2181

1659

2182

def __setattr__(self, name, value):

1660

2183

if name == '_pipe':

1661

2184

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

1664

2187

1665

2188

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

2189

"""A class to handle client connections.

1667

2190

1668

2191

Instantiated once for each connection to handle it.

1669

2192

Note: This will run in its own forked process."""

1670

2193

1671

2194

def handle(self):

1672

2195

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

1673

2196

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

1674

unicode(self.client_address))

2197

str(self.client_address))

1675

2198

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

1676

2199

self.server.child_pipe.fileno())

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+DHE-DSS"))

2200

2201

session = gnutls.ClientSession(self.request)

2202

2203

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

2204

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

2205

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

2206

# "+DHE-DSS"))

1692

2207

# Use a fallback default, since this MUST be set.

1693

2208

priority = self.server.gnutls_priority

1694

2209

if priority is None:

1695

2210

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2211

gnutls.priority_set_direct(session._c_object,

2212

priority.encode("utf-8"),

2213

None)

2214

1700

2215

# Start communication using the Mandos protocol

1701

2216

# Get protocol number

1702

2217

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

1707

2222

except (ValueError, IndexError, RuntimeError) as error:

1708

2223

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

1709

2224

return

1710

2225

1711

2226

# Start GnuTLS connection

1712

2227

try:

1713

2228

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

2229

except gnutls.Error as error:

1715

2230

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

1716

2231

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

1717

2232

# established. Just abandon the request.

1718

2233

return

1719

2234

logger.debug("Handshake succeeded")

1720

2235

1721

2236

approval_required = False

1722

2237

try:

1723

2238

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

2239

fpr = self.fingerprint(

2240

self.peer_certificate(session))

2241

except (TypeError, gnutls.Error) as error:

1728

2242

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

1729

2243

return

1730

2244

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

1731

2245

1732

2246

try:

1733

2247

client = ProxyClient(child_pipe, fpr,

1734

2248

self.client_address)

1735

2249

except KeyError:

1736

2250

return

1737

2251

1738

2252

if client.approval_delay:

1739

2253

delay = client.approval_delay

1740

2254

client.approvals_pending += 1

1741

2255

approval_required = True

1742

2256

1743

2257

while True:

1744

2258

if not client.enabled:

1745

2259

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

1746

client.name)

2260

client.name)

1747

2261

if self.server.use_dbus:

1748

2262

# Emit D-Bus signal

1749

2263

client.Rejected("Disabled")

1750

2264

return

1751

2265

1752

2266

if client.approved or not client.approval_delay:

1753

#We are approved or approval is disabled

2267

# We are approved or approval is disabled

1754

2268

break

1755

2269

elif client.approved is None:

1756

2270

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

1758

2272

if self.server.use_dbus:

1759

2273

# Emit D-Bus signal

1760

2274

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2275

client.approval_delay.total_seconds()

2276

* 1000, client.approved_by_default)

1763

2277

else:

1764

2278

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

1765

2279

client.name)

1767

2281

# Emit D-Bus signal

1768

2282

client.Rejected("Denied")

1769

2283

return

1770

1771

#wait until timeout or approved

2284

2285

# wait until timeout or approved

1772

2286

time = datetime.datetime.now()

1773

2287

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2288

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

1777

2289

client.changedstate.release()

1778

2290

time2 = datetime.datetime.now()

1779

2291

if (time2 - time) >= delay:

1789

2301

break

1790

2302

else:

1791

2303

delay -= time2 - time

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

2304

2305

try:

2306

session.send(client.secret)

2307

except gnutls.Error as error:

2308

logger.warning("gnutls send failed",

2309

exc_info=error)

2310

return

2311

1806

2312

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

1807

2313

# bump the timeout using extended_timeout

1808

2314

client.bump_timeout(client.extended_timeout)

1809

2315

if self.server.use_dbus:

1810

2316

# Emit D-Bus signal

1811

2317

client.GotSecret()

1812

2318

1813

2319

finally:

1814

2320

if approval_required:

1815

2321

client.approvals_pending -= 1

1816

2322

try:

1817

2323

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

2324

except gnutls.Error as error:

1819

2325

logger.warning("GnuTLS bye failed",

1820

2326

exc_info=error)

1821

2327

1822

2328

@staticmethod

1823

2329

def peer_certificate(session):

1824

2330

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

1825

2331

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2332

if (gnutls.certificate_type_get(session._c_object)

2333

!= gnutls.CRT_OPENPGP):

2334

# ...return invalid data

2335

return b""

1831

2336

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2337

cert_list = (gnutls.certificate_get_peers

1834

2338

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

1835

2339

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

1836

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

1837

" certificate")

2340

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

1838

2341

if list_size.value == 0:

1839

2342

return None

1840

2343

cert = cert_list[0]

1841

2344

return ctypes.string_at(cert.data, cert.size)

1842

2345

1843

2346

@staticmethod

1844

2347

def fingerprint(openpgp):

1845

2348

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2349

# New GnuTLS "datum" with the OpenPGP public key

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

2350

datum = gnutls.datum_t(

2351

ctypes.cast(ctypes.c_char_p(openpgp),

2352

ctypes.POINTER(ctypes.c_ubyte)),

2353

ctypes.c_uint(len(openpgp)))

1852

2354

# New empty GnuTLS certificate

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2355

crt = gnutls.openpgp_crt_t()

2356

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2357

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2358

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

2359

gnutls.OPENPGP_FMT_RAW)

1861

2360

# Verify the self signature in the key

1862

2361

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2362

gnutls.openpgp_crt_verify_self(crt, 0,

2363

ctypes.byref(crtverify))

1866

2364

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2365

gnutls.openpgp_crt_deinit(crt)

2366

raise gnutls.CertificateSecurityError("Verify failed")

1870

2367

# New buffer for the fingerprint

1871

2368

buf = ctypes.create_string_buffer(20)

1872

2369

buf_len = ctypes.c_size_t()

1873

2370

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2371

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

2372

ctypes.byref(buf_len))

1877

2373

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2374

gnutls.openpgp_crt_deinit(crt)

1879

2375

# Convert the buffer to a Python bytestring

1880

2376

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

1881

2377

# Convert the bytestring to hexadecimal notation

1885

2381

1886

2382

class MultiprocessingMixIn(object):

1887

2383

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

2384

1888

2385

def sub_process_main(self, request, address):

1889

2386

try:

1890

2387

self.finish_request(request, address)

1891

2388

except Exception:

1892

2389

self.handle_error(request, address)

1893

2390

self.close_request(request)

1894

2391

1895

2392

def process_request(self, request, address):

1896

2393

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

1897

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

1898

args = (request, address))

2394

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

2395

args=(request, address))

1899

2396

proc.start()

1900

2397

return proc

1901

2398

1902

2399

1903

2400

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

2401

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

2402

1905

2403

def process_request(self, request, client_address):

1906

2404

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

1907

2405

1908

2406

This function creates a new pipe in self.pipe

1909

2407

"""

1910

2408

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

2409

1912

2410

proc = MultiprocessingMixIn.process_request(self, request,

1913

2411

client_address)

1914

2412

self.child_pipe.close()

1915

2413

self.add_pipe(parent_pipe, proc)

1916

2414

1917

2415

def add_pipe(self, parent_pipe, proc):

1918

2416

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

1919

2417

raise NotImplementedError()

1922

2420

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

2421

socketserver.TCPServer, object):

1924

2422

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

1925

2423

1926

2424

Attributes:

1927

2425

enabled: Boolean; whether this server is activated yet

1928

2426

interface: None or a network interface name (string)

1929

2427

use_ipv6: Boolean; to use IPv6 or not

1930

2428

"""

2429

1931

2430

def __init__(self, server_address, RequestHandlerClass,

1932

interface=None, use_ipv6=True, socketfd=None):

2431

interface=None,

2432

use_ipv6=True,

2433

socketfd=None):

1933

2434

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

1934

2435

creating a new one with socket.socket().

1935

2436

"""

1941

2442

self.socketfd = socketfd

1942

2443

# Save the original socket.socket() function

1943

2444

self.socket_socket = socket.socket

2445

1944

2446

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

1945

#

2447

#

1946

2448

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

1947

2449

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

1948

2450

# patching socket.socket.)

1949

#

2451

#

1950

2452

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

1951

2453

@functools.wraps(socket.socket)

1952

2454

def socket_wrapper(*args, **kwargs):

1964

2466

# socket_wrapper(), if socketfd was set.

1965

2467

socketserver.TCPServer.__init__(self, server_address,

1966

2468

RequestHandlerClass)

1967

2469

1968

2470

def server_bind(self):

1969

2471

"""This overrides the normal server_bind() function

1970

2472

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

1971

2473

bind to an address or port if they were not specified."""

2474

global SO_BINDTODEVICE

1972

2475

if self.interface is not None:

1973

2476

if SO_BINDTODEVICE is None:

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

str(self.interface + '\0'))

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

raise

2477

# Fall back to a hard-coded value which seems to be

2478

# common enough.

2479

logger.warning("SO_BINDTODEVICE not found, trying 25")

2480

SO_BINDTODEVICE = 25

2481

try:

2482

self.socket.setsockopt(

2483

socket.SOL_SOCKET, SO_BINDTODEVICE,

2484

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

2485

except socket.error as error:

2486

if error.errno == errno.EPERM:

2487

logger.error("No permission to bind to"

2488

" interface %s", self.interface)

2489

elif error.errno == errno.ENOPROTOOPT:

2490

logger.error("SO_BINDTODEVICE not available;"

2491

" cannot bind to interface %s",

2492

self.interface)

2493

elif error.errno == errno.ENODEV:

2494

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

2495

" cannot bind", self.interface)

2496

else:

2497

raise

1995

2498

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

1996

2499

if self.server_address[0] or self.server_address[1]:

1997

2500

if not self.server_address[0]:

1998

2501

if self.address_family == socket.AF_INET6:

1999

any_address = "::" # in6addr_any

2502

any_address = "::" # in6addr_any

2000

2503

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

2504

any_address = "0.0.0.0" # INADDR_ANY

2002

2505

self.server_address = (any_address,

2003

2506

self.server_address[1])

2004

2507

elif not self.server_address[1]:

2005

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

2006

0)

2508

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

2007

2509

# if self.interface:

2008

2510

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

2009

2511

# 0, # port

2015

2517

2016

2518

class MandosServer(IPv6_TCPServer):

2017

2519

"""Mandos server.

2018

2520

2019

2521

Attributes:

2020

2522

clients: set of Client objects

2021

2523

gnutls_priority GnuTLS priority string

2022

2524

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

2023

2024

Assumes a gobject.MainLoop event loop.

2525

2526

Assumes a GLib.MainLoop event loop.

2025

2527

"""

2528

2026

2529

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

gnutls_priority=None, use_dbus=True, socketfd=None):

2530

interface=None,

2531

use_ipv6=True,

2532

clients=None,

2533

gnutls_priority=None,

2534

use_dbus=True,

2535

socketfd=None):

2029

2536

self.enabled = False

2030

2537

self.clients = clients

2031

2538

if self.clients is None:

2034

2541

self.gnutls_priority = gnutls_priority

2035

2542

IPv6_TCPServer.__init__(self, server_address,

2036

2543

RequestHandlerClass,

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2544

interface=interface,

2545

use_ipv6=use_ipv6,

2546

socketfd=socketfd)

2547

2040

2548

def server_activate(self):

2041

2549

if self.enabled:

2042

2550

return socketserver.TCPServer.server_activate(self)

2043

2551

2044

2552

def enable(self):

2045

2553

self.enabled = True

2046

2554

2047

2555

def add_pipe(self, parent_pipe, proc):

2048

2556

# Call "handle_ipc" for both data and EOF events

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

proc = None, client_object=None):

2557

GLib.io_add_watch(

2558

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2560

functools.partial(self.handle_ipc,

2561

parent_pipe=parent_pipe,

2562

proc=proc))

2563

2564

def handle_ipc(self, source, condition,

2565

parent_pipe=None,

2566

proc=None,

2567

client_object=None):

2058

2568

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

2059

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

2569

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

2060

2570

# Wait for other process to exit

2061

2571

proc.join()

2062

2572

return False

2063

2573

2064

2574

# Read a request from the child

2065

2575

request = parent_pipe.recv()

2066

2576

command = request[0]

2067

2577

2068

2578

if command == 'init':

2069

2579

fpr = request[1]

2070

2580

address = request[2]

2071

2072

for c in self.clients.itervalues():

2581

2582

for c in self.clients.values():

2073

2583

if c.fingerprint == fpr:

2074

2584

client = c

2075

2585

break

2082

2592

address[0])

2083

2593

parent_pipe.send(False)

2084

2594

return False

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2595

2596

GLib.io_add_watch(

2597

parent_pipe.fileno(),

2598

GLib.IO_IN | GLib.IO_HUP,

2599

functools.partial(self.handle_ipc,

2600

parent_pipe=parent_pipe,

2601

proc=proc,

2602

client_object=client))

2094

2603

parent_pipe.send(True)

2095

2604

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

2096

2605

# same fileno

2099

2608

funcname = request[1]

2100

2609

args = request[2]

2101

2610

kwargs = request[3]

2102

2611

2103

2612

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

2104

2613

funcname)(*args,

2105

**kwargs)))

2106

2614

**kwargs)))

2615

2107

2616

if command == 'getattr':

2108

2617

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2618

if isinstance(client_object.__getattribute__(attrname),

2619

collections.Callable):

2620

parent_pipe.send(('function', ))

2111

2621

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2622

parent_pipe.send((

2623

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

2624

2115

2625

if command == 'setattr':

2116

2626

attrname = request[1]

2117

2627

value = request[2]

2118

2628

setattr(client_object, attrname, value)

2119

2629

2120

2630

return True

2121

2631

2122

2632

2123

2633

def rfc3339_duration_to_delta(duration):

2124

2634

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

2125

2635

2126

2636

>>> rfc3339_duration_to_delta("P7D")

2127

2637

datetime.timedelta(7)

2128

2638

>>> rfc3339_duration_to_delta("PT60S")

2138

2648

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

2649

datetime.timedelta(1, 200)

2140

2650

"""

2141

2651

2142

2652

# Parsing an RFC 3339 duration with regular expressions is not

2143

2653

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

2144

2654

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

2145

2655

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

2146

2656

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

2147

2657

# avoid excessive use of external libraries.

2148

2658

2149

2659

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2660

Token = collections.namedtuple("Token", (

2661

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

2662

# a "group" containing digits

2663

"value", # datetime.timedelta or None

2664

"followers")) # Tokens valid after this token

2159

2665

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

2160

2666

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

2161

2667

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

2162

2668

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

2163

2669

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2670

frozenset((token_end, )))

2165

2671

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

2166

2672

datetime.timedelta(minutes=1),

2167

2673

frozenset((token_second, token_end)))

2183

2689

frozenset((token_month, token_end)))

2184

2690

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

2185

2691

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2692

frozenset((token_end, )))

2187

2693

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

2188

2694

frozenset((token_year, token_month,

2189

2695

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2696

token_week)))

2697

# Define starting values:

2698

# Value so far

2699

value = datetime.timedelta()

2193

2700

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2701

# Following valid tokens

2702

followers = frozenset((token_duration, ))

2703

# String left to parse

2704

s = duration

2196

2705

# Loop until end token is found

2197

2706

while found_token is not token_end:

2198

2707

# Search for any currently valid tokens

2214

2723

break

2215

2724

else:

2216

2725

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2726

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

2727

.format(duration))

2218

2728

# End token found

2219

2729

return value

2220

2730

2221

2731

2222

2732

def string_to_delta(interval):

2223

2733

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

2224

2734

2225

2735

>>> string_to_delta('7d')

2226

2736

datetime.timedelta(7)

2227

2737

>>> string_to_delta('60s')

2235

2745

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

2236

2746

datetime.timedelta(0, 330)

2237

2747

"""

2238

2748

2239

2749

try:

2240

2750

return rfc3339_duration_to_delta(interval)

2241

2751

except ValueError:

2242

2752

pass

2243

2753

2244

2754

timevalue = datetime.timedelta(0)

2245

2755

for s in interval.split():

2246

2756

try:

2247

suffix = unicode(s[-1])

2757

suffix = s[-1]

2248

2758

value = int(s[:-1])

2249

2759

if suffix == "d":

2250

2760

delta = datetime.timedelta(value)

2257

2767

elif suffix == "w":

2258

2768

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

2259

2769

else:

2260

raise ValueError("Unknown suffix {0!r}"

2261

.format(suffix))

2770

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

2262

2771

except IndexError as e:

2263

2772

raise ValueError(*(e.args))

2264

2773

timevalue += delta

2265

2774

return timevalue

2266

2775

2267

2776

2268

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

2777

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

2269

2778

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

2270

2779

2271

2780

This should really exist as os.daemon, but it doesn't (yet)."""

2272

2781

if os.fork():

2273

2782

sys.exit()

2281

2790

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

2282

2791

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

2283

2792

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2793

"{} not a character device"

2285

2794

.format(os.devnull))

2286

2795

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

2287

2796

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

2291

2800

2292

2801

2293

2802

def main():

2294

2803

2295

2804

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

2296

2805

# Parsing of options, both command line and config file

2297

2806

2298

2807

parser = argparse.ArgumentParser()

2299

2808

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

2300

version = "%(prog)s {0}".format(version),

2809

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

2301

2810

help="show version number and exit")

2302

2811

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

2303

2812

help="Bind to interface IF")

2336

2845

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

2337

2846

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

2338

2847

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

2339

2848

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

2849

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

2850

default=None)

2851

2340

2852

options = parser.parse_args()

2341

2853

2342

2854

if options.check:

2343

2855

import doctest

2344

2856

fail_count, test_count = doctest.testmod()

2345

2857

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

2346

2858

2347

2859

# Default values for config file for server-global settings

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

2860

server_defaults = {"interface": "",

2861

"address": "",

2862

"port": "",

2863

"debug": "False",

2864

"priority":

2865

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

2866

":+SIGN-DSA-SHA256",

2867

"servicename": "Mandos",

2868

"use_dbus": "True",

2869

"use_ipv6": "True",

2870

"debuglevel": "",

2871

"restore": "True",

2872

"socket": "",

2873

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

2874

"foreground": "False",

2875

"zeroconf": "True",

2876

}

2877

2364

2878

# Parse config file for server-global settings

2365

2879

server_config = configparser.SafeConfigParser(server_defaults)

2366

2880

del server_defaults

2367

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

2368

"mandos.conf"))

2881

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

2369

2882

# Convert the SafeConfigParser object to a dict

2370

2883

server_settings = server_config.defaults()

2371

2884

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

2385

2898

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

2386

2899

["socket"])

2387

2900

del server_config

2388

2901

2389

2902

# Override the settings from the config file with command line

2390

2903

# options, if set.

2391

2904

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

2392

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

2393

"use_dbus", "use_ipv6", "debuglevel", "restore",

2394

"statedir", "socket", "foreground"):

2905

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

2906

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

2907

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

2395

2908

value = getattr(options, option)

2396

2909

if value is not None:

2397

2910

server_settings[option] = value

2398

2911

del options

2399

2912

# Force all strings to be unicode

2400

2913

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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

2914

if isinstance(server_settings[option], bytes):

2915

server_settings[option] = (server_settings[option]

2916

.decode("utf-8"))

2403

2917

# Force all boolean options to be boolean

2404

2918

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

2405

"foreground"):

2919

"foreground", "zeroconf"):

2406

2920

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

2407

2921

# Debug implies foreground

2408

2922

if server_settings["debug"]:

2409

2923

server_settings["foreground"] = True

2410

2924

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

2411

2925

2412

2926

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

2413

2927

2928

if (not server_settings["zeroconf"]

2929

and not (server_settings["port"]

2930

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

2931

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

2932

2414

2933

# For convenience

2415

2934

debug = server_settings["debug"]

2416

2935

debuglevel = server_settings["debuglevel"]

2419

2938

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

2420

2939

stored_state_file)

2421

2940

foreground = server_settings["foreground"]

2422

2941

zeroconf = server_settings["zeroconf"]

2942

2423

2943

if debug:

2424

2944

initlogger(debug, logging.DEBUG)

2425

2945

else:

2428

2948

else:

2429

2949

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

2430

2950

initlogger(debug, level)

2431

2951

2432

2952

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

2433

syslogger.setFormatter(logging.Formatter

2434

('Mandos ({0}) [%(process)d]:'

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

2953

syslogger.setFormatter(

2954

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

2955

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

2956

server_settings["servicename"])))

2957

2439

2958

# Parse config file with clients

2440

2959

client_config = configparser.SafeConfigParser(Client

2441

2960

.client_defaults)

2442

2961

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

2443

2962

"clients.conf"))

2444

2963

2445

2964

global mandos_dbus_service

2446

2965

mandos_dbus_service = None

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2966

2967

socketfd = None

2968

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

2969

socketfd = server_settings["socket"]

2970

tcp_server = MandosServer(

2971

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

2972

ClientHandler,

2973

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

2974

use_ipv6=use_ipv6,

2975

gnutls_priority=server_settings["priority"],

2976

use_dbus=use_dbus,

2977

socketfd=socketfd)

2459

2978

if not foreground:

2460

2979

pidfilename = "/run/mandos.pid"

2461

2980

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

2462

2981

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

2463

2982

pidfile = None

2464

2983

try:

2465

pidfile = open(pidfilename, "w")

2984

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

2466

2985

except IOError as e:

2467

2986

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

2468

2987

exc_info=e)

2469

2470

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

2988

2989

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

2990

("mandos", "mandos"),

2991

("nobody", "nogroup")):

2471

2992

try:

2472

2993

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2994

gid = pwd.getpwnam(group).pw_gid

2474

2995

break

2475

2996

except KeyError:

2476

2997

continue

2480

3001

try:

2481

3002

os.setgid(gid)

2482

3003

os.setuid(uid)

3004

if debug:

3005

logger.debug("Did setuid/setgid to {}:{}".format(uid,

3006

gid))

2483

3007

except OSError as error:

3008

logger.warning("Failed to setuid/setgid to {}:{}: {}"

3009

.format(uid, gid, os.strerror(error.errno)))

2484

3010

if error.errno != errno.EPERM:

2485

3011

raise

2486

3012

2487

3013

if debug:

2488

3014

# Enable all possible GnuTLS debugging

2489

3015

2490

3016

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

2491

3017

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3018

gnutls.global_set_log_level(11)

3019

3020

@gnutls.log_func

2495

3021

def debug_gnutls(level, string):

2496

3022

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

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3023

3024

gnutls.global_set_log_function(debug_gnutls)

3025

2501

3026

# Redirect stdin so all checkers get /dev/null

2502

3027

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

2503

3028

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

2504

3029

if null > 2:

2505

3030

os.close(null)

2506

3031

2507

3032

# Need to fork before connecting to D-Bus

2508

3033

if not foreground:

2509

3034

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

2510

3035

daemon()

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

3036

3037

# multiprocessing will use threads, so before we use GLib we need

3038

# to inform GLib that threads will be used.

3039

GLib.threads_init()

3040

2516

3041

global main_loop

2517

3042

# From the Avahi example code

2518

3043

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3044

main_loop = GLib.MainLoop()

2520

3045

bus = dbus.SystemBus()

2521

3046

# End of Avahi example code

2522

3047

if use_dbus:

2523

3048

try:

2524

3049

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

3050

bus,

3051

do_not_queue=True)

3052

old_bus_name = dbus.service.BusName(

3053

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

3054

do_not_queue=True)

3055

except dbus.exceptions.DBusException as e:

2530

3056

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

2531

3057

use_dbus = False

2532

3058

server_settings["use_dbus"] = False

2533

3059

tcp_server.use_dbus = False

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

3060

if zeroconf:

3061

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3062

service = AvahiServiceToSyslog(

3063

name=server_settings["servicename"],

3064

servicetype="_mandos._tcp",

3065

protocol=protocol,

3066

bus=bus)

3067

if server_settings["interface"]:

3068

service.interface = if_nametoindex(

3069

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

3070

2543

3071

global multiprocessing_manager

2544

3072

multiprocessing_manager = multiprocessing.Manager()

2545

3073

2546

3074

client_class = Client

2547

3075

if use_dbus:

2548

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

2549

3076

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

3077

2550

3078

client_settings = Client.config_parser(client_config)

2551

3079

old_client_settings = {}

2552

3080

clients_data = {}

2553

3081

2554

3082

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

2555

3083

global wnull

2556

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

3084

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

2557

3085

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

2558

3086

# mode

2559

3087

if debug or not foreground:

2560

3088

wnull.close()

2561

3089

2562

3090

# Get client data and settings from last running state.

2563

3091

if server_settings["restore"]:

2564

3092

try:

2565

3093

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3094

if sys.version_info.major == 2:

3095

clients_data, old_client_settings = pickle.load(

3096

stored_state)

3097

else:

3098

bytes_clients_data, bytes_old_client_settings = (

3099

pickle.load(stored_state, encoding="bytes"))

3100

# Fix bytes to strings

3101

# clients_data

3102

# .keys()

3103

clients_data = {(key.decode("utf-8")

3104

if isinstance(key, bytes)

3105

else key): value

3106

for key, value in

3107

bytes_clients_data.items()}

3108

del bytes_clients_data

3109

for key in clients_data:

3110

value = {(k.decode("utf-8")

3111

if isinstance(k, bytes) else k): v

3112

for k, v in

3113

clients_data[key].items()}

3114

clients_data[key] = value

3115

# .client_structure

3116

value["client_structure"] = [

3117

(s.decode("utf-8")

3118

if isinstance(s, bytes)

3119

else s) for s in

3120

value["client_structure"]]

3121

# .name & .host

3122

for k in ("name", "host"):

3123

if isinstance(value[k], bytes):

3124

value[k] = value[k].decode("utf-8")

3125

# old_client_settings

3126

# .keys()

3127

old_client_settings = {

3128

(key.decode("utf-8")

3129

if isinstance(key, bytes)

3130

else key): value

3131

for key, value in

3132

bytes_old_client_settings.items()}

3133

del bytes_old_client_settings

3134

# .host

3135

for value in old_client_settings.values():

3136

if isinstance(value["host"], bytes):

3137

value["host"] = (value["host"]

3138

.decode("utf-8"))

2568

3139

os.remove(stored_state_path)

2569

3140

except IOError as e:

2570

3141

if e.errno == errno.ENOENT:

2571

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

2572

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

3142

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

3143

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

2573

3144

else:

2574

3145

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

2575

3146

exc_info=e)

2576

3147

raise

2577

3148

except EOFError as e:

2578

3149

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

2579

"EOFError:", exc_info=e)

2580

3150

"EOFError:",

3151

exc_info=e)

3152

2581

3153

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3154

for client_name, client in clients_data.items():

2583

3155

# Skip removed clients

2584

3156

if client_name not in client_settings:

2585

3157

continue

2586

3158

2587

3159

# Decide which value to use after restoring saved state.

2588

3160

# We have three different values: Old config file,

2589

3161

# new config file, and saved state.

2594

3166

# For each value in new config, check if it

2595

3167

# differs from the old config value (Except for

2596

3168

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3169

if (name != "secret"

3170

and (value !=

3171

old_client_settings[client_name][name])):

2600

3172

client[name] = value

2601

3173

except KeyError:

2602

3174

pass

2603

3175

2604

3176

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3177

# enabled if its last checker was successful. A Client

2606

3178

# whose checker succeeded before we stored its state is

2607

3179

# assumed to have successfully run all checkers during

2608

3180

# downtime.

2610

3182

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

2611

3183

if not client["last_checked_ok"]:

2612

3184

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3185

"disabling client {} - Client never "

3186

"performed a successful checker".format(

3187

client_name))

2616

3188

client["enabled"] = False

2617

3189

elif client["last_checker_status"] != 0:

2618

3190

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3191

"disabling client {} - Client last"

3192

" checker failed with error code"

3193

" {}".format(

3194

client_name,

3195

client["last_checker_status"]))

2623

3196

client["enabled"] = False

2624

3197

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3198

client["expires"] = (

3199

datetime.datetime.utcnow()

3200

+ client["timeout"])

2628

3201

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3202

" keeping {} enabled".format(

3203

client_name))

2631

3204

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3205

client["secret"] = pgp.decrypt(

3206

client["encrypted_secret"],

3207

client_settings[client_name]["secret"])

2636

3208

except PGPError:

2637

3209

# If decryption fails, we use secret from new settings

2638

logger.debug("Failed to decrypt {0} old secret"

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3210

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

3211

client_name))

3212

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

3213

["secret"])

3214

2643

3215

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

2644

3216

for client_name in (set(old_client_settings)

2645

3217

- set(client_settings)):

2647

3219

for client_name in (set(client_settings)

2648

3220

- set(old_client_settings)):

2649

3221

clients_data[client_name] = client_settings[client_name]

2650

3222

2651

3223

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3224

for client_name, client in clients_data.items():

2653

3225

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3226

name=client_name,

3227

settings=client,

3228

server_settings=server_settings)

3229

2657

3230

if not tcp_server.clients:

2658

3231

logger.warning("No clients defined")

2659

3232

2660

3233

if not foreground:

2661

3234

if pidfile is not None:

3235

pid = os.getpid()

2662

3236

try:

2663

3237

with pidfile:

2664

pid = os.getpid()

2665

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

3238

print(pid, file=pidfile)

2666

3239

except IOError:

2667

3240

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

2668

3241

pidfilename, pid)

2669

3242

del pidfile

2670

3243

del pidfilename

2671

2672

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

2673

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

2674

3244

3245

for termsig in (signal.SIGHUP, signal.SIGTERM):

3246

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3247

lambda: main_loop.quit() and False)

3248

2675

3249

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3250

3251

@alternate_dbus_interfaces(

3252

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

3253

class MandosDBusService(DBusObjectWithObjectManager):

2679

3254

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

3255

2680

3256

def __init__(self):

2681

3257

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

3258

2682

3259

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3260

2690

3261

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

2691

3262

def ClientAdded(self, objpath):

2692

3263

"D-Bus signal"

2693

3264

pass

2694

3265

2695

3266

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

2696

3267

def ClientNotFound(self, fingerprint, address):

2697

3268

"D-Bus signal"

2698

3269

pass

2699

3270

3271

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

3272

"true"})

2700

3273

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

2701

3274

def ClientRemoved(self, objpath, name):

2702

3275

"D-Bus signal"

2703

3276

pass

2704

3277

3278

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

3279

"true"})

2705

3280

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

2706

3281

def GetAllClients(self):

2707

3282

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3283

return dbus.Array(c.dbus_object_path for c in

3284

tcp_server.clients.values())

3285

3286

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

3287

"true"})

2712

3288

@dbus.service.method(_interface,

2713

3289

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

2714

3290

def GetAllClientsWithProperties(self):

2715

3291

"D-Bus method"

2716

3292

return dbus.Dictionary(

2717

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

2718

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

3293

{c.dbus_object_path: c.GetAll(

3294

"se.recompile.Mandos.Client")

3295

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

2719

3296

signature="oa{sv}")

2720

3297

2721

3298

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

2722

3299

def RemoveClient(self, object_path):

2723

3300

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3301

for c in tcp_server.clients.values():

2725

3302

if c.dbus_object_path == object_path:

2726

3303

del tcp_server.clients[c.name]

2727

3304

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3305

# Don't signal the disabling

2729

3306

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3307

# Emit D-Bus signal for removal

3308

self.client_removed_signal(c)

2732

3309

return

2733

3310

raise KeyError(object_path)

2734

3311

2735

3312

del _interface

2736

3313

3314

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3315

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

3316

def GetManagedObjects(self):

3317

"""D-Bus method"""

3318

return dbus.Dictionary(

3319

{client.dbus_object_path:

3320

dbus.Dictionary(

3321

{interface: client.GetAll(interface)

3322

for interface in

3323

client._get_all_interface_names()})

3324

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

3325

3326

def client_added_signal(self, client):

3327

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

3328

if use_dbus:

3329

# New standard signal

3330

self.InterfacesAdded(

3331

client.dbus_object_path,

3332

dbus.Dictionary(

3333

{interface: client.GetAll(interface)

3334

for interface in

3335

client._get_all_interface_names()}))

3336

# Old signal

3337

self.ClientAdded(client.dbus_object_path)

3338

3339

def client_removed_signal(self, client):

3340

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

3341

if use_dbus:

3342

# New standard signal

3343

self.InterfacesRemoved(

3344

client.dbus_object_path,

3345

client._get_all_interface_names())

3346

# Old signal

3347

self.ClientRemoved(client.dbus_object_path,

3348

client.name)

3349

2737

3350

mandos_dbus_service = MandosDBusService()

2738

3351

3352

# Save modules to variables to exempt the modules from being

3353

# unloaded before the function registered with atexit() is run.

3354

mp = multiprocessing

3355

wn = wnull

3356

2739

3357

def cleanup():

2740

3358

"Cleanup function; run on exit"

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3359

if zeroconf:

3360

service.cleanup()

3361

3362

mp.active_children()

3363

wn.close()

2745

3364

if not (tcp_server.clients or client_settings):

2746

3365

return

2747

3366

2748

3367

# Store client before exiting. Secrets are encrypted with key

2749

3368

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

2750

3369

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

2751

3370

clients = {}

2752

3371

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3372

for client in tcp_server.clients.values():

2754

3373

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

2755

3374

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

2756

3375

key)

2757

3376

client_dict = {}

2758

3377

2759

3378

# A list of attributes that can not be pickled

2760

3379

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3380

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

3381

"checker", "server_settings"}

3382

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

3383

.Object):

2765

3384

exclude.add(name)

2766

3385

2767

3386

client_dict["encrypted_secret"] = (client

2768

3387

.encrypted_secret)

2769

3388

for attr in client.client_structure:

2770

3389

if attr not in exclude:

2771

3390

client_dict[attr] = getattr(client, attr)

2772

3391

2773

3392

clients[client.name] = client_dict

2774

3393

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

2775

3394

2776

3395

try:

2777

with (tempfile.NamedTemporaryFile

2778

(mode='wb', suffix=".pickle", prefix='clients-',

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

3396

with tempfile.NamedTemporaryFile(

3397

mode='wb',

3398

suffix=".pickle",

3399

prefix='clients-',

3400

dir=os.path.dirname(stored_state_path),

3401

delete=False) as stored_state:

3402

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

3403

protocol=2)

3404

tempname = stored_state.name

2783

3405

os.rename(tempname, stored_state_path)

2784

3406

except (IOError, OSError) as e:

2785

3407

if not debug:

2788

3410

except NameError:

2789

3411

pass

2790

3412

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

2791

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

3413

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

2792

3414

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

2793

3415

else:

2794

3416

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

2795

3417

exc_info=e)

2796

3418

raise

2797

3419

2798

3420

# Delete all clients, and settings from config

2799

3421

while tcp_server.clients:

2800

3422

name, client = tcp_server.clients.popitem()

2801

3423

if use_dbus:

2802

3424

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3425

# Don't signal the disabling

2804

3426

client.disable(quiet=True)

3427

# Emit D-Bus signal for removal

2805

3428

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3429

mandos_dbus_service.client_removed_signal(client)

2810

3430

client_settings.clear()

2811

3431

2812

3432

atexit.register(cleanup)

2813

2814

for client in tcp_server.clients.itervalues():

3433

3434

for client in tcp_server.clients.values():

2815

3435

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3436

# Emit D-Bus signal for adding

3437

mandos_dbus_service.client_added_signal(client)

2818

3438

# Need to initiate checking of clients

2819

3439

if client.enabled:

2820

3440

client.init_checker()

2821

3441

2822

3442

tcp_server.enable()

2823

3443

tcp_server.server_activate()

2824

3444

2825

3445

# Find out what port we got

2826

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

3446

if zeroconf:

3447

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

2827

3448

if use_ipv6:

2828

3449

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

2829

3450

" flowinfo %d, scope_id %d",

2831

3452

else: # IPv4

2832

3453

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

2833

3454

*tcp_server.socket.getsockname())

2834

2835

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

2836

3455

3456

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

3457

2837

3458

try:

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

3459

if zeroconf:

3460

# From the Avahi example code

3461

try:

3462

service.activate()

3463

except dbus.exceptions.DBusException as error:

3464

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

3465

cleanup()

3466

sys.exit(1)

3467

# End of Avahi example code

3468

3469

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

3470

lambda *args, **kwargs:

3471

(tcp_server.handle_request

3472

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

3473

2852

3474

logger.debug("Starting main loop")

2853

3475

main_loop.run()

2854

3476

except AvahiError as error:

2863

3485

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

2864

3486

cleanup()

2865

3487

3488

2866

3489

if __name__ == '__main__':

2867

3490

main()