/mandos/trunk : revision 960

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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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# 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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#

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# This file is part of Mandos.

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#

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

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# 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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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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

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# Mandos is distributed in the hope that it will be useful, but

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# 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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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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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 = "1.6.2"

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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 = "1.7.20"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = 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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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)

225

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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314

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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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321

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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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353

self.type = servicetype

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362

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"""

277

368

if self.rename_count >= self.max_renames:

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369

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

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370

" after %i retries, exiting.",

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self.rename_count)

281

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raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

284

376

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

285

377

self.name)

286

self.remove()

378

if remove:

379

self.remove()

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try:

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381

self.add()

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382

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

295

392

def remove(self):

296

393

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

297

394

if self.entry_group_state_changed_match is not None:

299

396

self.entry_group_state_changed_match = None

300

397

if self.group is not None:

301

398

self.group.Reset()

302

399

303

400

def add(self):

304

401

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

305

402

self.remove()

322

419

dbus.UInt16(self.port),

323

420

avahi.string_array_to_txt_array(self.TXT))

324

421

self.group.Commit()

325

422

326

423

def entry_group_state_changed(self, state, error):

327

424

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

328

425

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

329

426

330

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

331

428

logger.debug("Zeroconf service established.")

332

429

elif state == avahi.ENTRY_GROUP_COLLISION:

334

431

self.rename()

335

432

elif state == avahi.ENTRY_GROUP_FAILURE:

336

433

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

337

unicode(error))

338

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

339

.format(error))

340

434

str(error))

435

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

436

341

437

def cleanup(self):

342

438

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

343

439

if self.group is not None:

348

444

pass

349

445

self.group = None

350

446

self.remove()

351

447

352

448

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

353

449

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

354

450

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

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

362

457

if state in bad_states:

363

458

if bad_states[state] is not None:

364

459

if error is None:

367

462

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

368

463

self.cleanup()

369

464

elif state == avahi.SERVER_RUNNING:

370

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

371

477

else:

372

478

if error is None:

373

479

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

374

480

else:

375

481

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

376

482

377

483

def activate(self):

378

484

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

379

485

if self.server is None:

383

489

follow_name_owner_changes=True),

384

490

avahi.DBUS_INTERFACE_SERVER)

385

491

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

492

self.server_state_changed)

387

493

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

388

494

389

495

390

496

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

497

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

392

498

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

499

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

398

503

return ret

399

504

400

505

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

518

def __init__(self):

519

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

520

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

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

def call_pipe(connection, # : multiprocessing.Connection

770

func, *args, **kwargs):

771

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

772

773

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

774

return value on the provided multiprocessing.Connection.

775

"""

776

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

777

connection.close()

406

778

407

779

408

780

class Client(object):

409

781

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

410

782

411

783

Attributes:

412

784

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

413

785

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

415

787

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

416

788

to see if the client lives.

417

789

'None' if no process is running.

418

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

419

791

checker_command: string; External command which is run to check

420

792

if client lives. %() expansions are done at

421

793

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

422

794

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

423

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

424

796

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

425

797

client_structure: Object describing what attributes a client has

426

798

and is used for storing the client at exit

427

799

current_checker_command: string; current running checker_command

428

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

429

801

enabled: bool()

430

802

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

431

803

uniquely identify the client

436

808

last_checker_status: integer between 0 and 255 reflecting exit

437

809

status of last checker. -1 reflects crashed

438

810

checker, -2 means no checker completed yet.

811

last_checker_signal: The signal which killed the last checker, if

812

last_checker_status is -1

439

813

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

440

814

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

441

815

D-Bus identifiers

448

822

disabled, or None

449

823

server_settings: The server_settings dict from main()

450

824

"""

451

825

452

826

runtime_expansions = ("approval_delay", "approval_duration",

453

827

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

454

828

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

455

829

"last_approval_request", "last_checked_ok",

456

830

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

831

client_defaults = {

832

"timeout": "PT5M",

833

"extended_timeout": "PT15M",

834

"interval": "PT2M",

835

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

836

"host": "",

837

"approval_delay": "PT0S",

838

"approval_duration": "PT1S",

839

"approved_by_default": "True",

840

"enabled": "True",

841

}

842

483

843

@staticmethod

484

844

def config_parser(config):

485

845

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

492

852

for client_name in config.sections():

493

853

section = dict(config.items(client_name))

494

854

client = settings[client_name] = {}

495

855

496

856

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

497

857

# Reformat values from string types to Python types

498

858

client["approved_by_default"] = config.getboolean(

499

859

client_name, "approved_by_default")

500

860

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

501

861

"enabled")

502

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

503

866

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

504

867

.replace(" ", ""))

505

868

if "secret" in section:

506

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

869

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

870

.encode("utf-8"),

871

"base64")

507

872

elif "secfile" in section:

508

873

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

509

874

(section["secfile"])),

510

875

"rb") as secfile:

511

876

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

512

877

else:

513

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

878

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

514

879

.format(section))

515

880

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

516

881

client["extended_timeout"] = string_to_delta(

524

889

client["last_approval_request"] = None

525

890

client["last_checked_ok"] = None

526

891

client["last_checker_status"] = -2

527

892

528

893

return settings

529

530

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

894

895

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

531

896

self.name = name

532

897

if server_settings is None:

533

898

server_settings = {}

534

899

self.server_settings = server_settings

535

900

# adding all client settings

536

for setting, value in settings.iteritems():

901

for setting, value in settings.items():

537

902

setattr(self, setting, value)

538

903

539

904

if self.enabled:

540

905

if not hasattr(self, "last_enabled"):

541

906

self.last_enabled = datetime.datetime.utcnow()

545

910

else:

546

911

self.last_enabled = None

547

912

self.expires = None

548

913

549

914

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

553

915

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

554

916

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

555

917

datetime.datetime.utcnow())

556

918

557

919

# attributes specific for this server instance

558

920

self.checker = None

559

921

self.checker_initiator_tag = None

562

924

self.current_checker_command = None

563

925

self.approved = None

564

926

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

927

self.changedstate = multiprocessing_manager.Condition(

928

multiprocessing_manager.Lock())

929

self.client_structure = [attr

930

for attr in self.__dict__.keys()

570

931

if not attr.startswith("_")]

571

932

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

933

934

for name, t in inspect.getmembers(

935

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

577

936

if not name.startswith("_"):

578

937

self.client_structure.append(name)

579

938

580

939

# Send notice to process children that client state has changed

581

940

def send_changedstate(self):

582

941

with self.changedstate:

583

942

self.changedstate.notify_all()

584

943

585

944

def enable(self):

586

945

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

587

946

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

592

951

self.last_enabled = datetime.datetime.utcnow()

593

952

self.init_checker()

594

953

self.send_changedstate()

595

954

596

955

def disable(self, quiet=True):

597

956

"""Disable this client."""

598

957

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

600

959

if not quiet:

601

960

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

602

961

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

603

gobject.source_remove(self.disable_initiator_tag)

962

GLib.source_remove(self.disable_initiator_tag)

604

963

self.disable_initiator_tag = None

605

964

self.expires = None

606

965

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

607

gobject.source_remove(self.checker_initiator_tag)

966

GLib.source_remove(self.checker_initiator_tag)

608

967

self.checker_initiator_tag = None

609

968

self.stop_checker()

610

969

self.enabled = False

611

970

if not quiet:

612

971

self.send_changedstate()

613

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

972

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

614

973

return False

615

974

616

975

def __del__(self):

617

976

self.disable()

618

977

619

978

def init_checker(self):

620

979

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

621

980

# and every interval from then on.

622

981

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

984

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

985

self.start_checker)

627

986

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

628

987

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

990

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

633

991

# Also start a new checker *right now*.

634

992

self.start_checker()

635

636

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

637

996

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

638

997

self.checker_callback_tag = None

639

998

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

999

# Read return code from connection (see call_pipe)

1000

returncode = connection.recv()

1001

connection.close()

1002

1003

if returncode >= 0:

1004

self.last_checker_status = returncode

1005

self.last_checker_signal = None

642

1006

if self.last_checker_status == 0:

643

1007

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

644

1008

vars(self))

645

1009

self.checked_ok()

646

1010

else:

647

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

648

vars(self))

1011

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

649

1012

else:

650

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

651

1015

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

652

1016

vars(self))

653

1017

return False

1018

654

1019

def checked_ok(self):

655

1020

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

656

1021

self.last_checked_ok = datetime.datetime.utcnow()

657

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

658

1024

self.bump_timeout()

659

1025

660

1026

def bump_timeout(self, timeout=None):

661

1027

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

662

1028

if timeout is None:

663

1029

timeout = self.timeout

664

1030

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

666

1032

self.disable_initiator_tag = None

667

1033

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

671

1036

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

672

1037

673

1038

def need_approval(self):

674

1039

self.last_approval_request = datetime.datetime.utcnow()

675

1040

676

1041

def start_checker(self):

677

1042

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

678

1043

679

1044

If a checker already exists, leave it running and do

680

1045

nothing."""

681

1046

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

686

1051

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

687

1052

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

688

1053

# should be.

689

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

1054

1055

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

1056

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

1057

self.checker.join()

1058

self.checker = None

704

1059

# Start a new checker if needed

705

1060

if self.checker is None:

706

1061

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

711

1065

try:

712

1066

command = self.checker_command % escaped_attrs

713

1067

except TypeError as error:

714

1068

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

1069

self.checker_command,

1070

exc_info=error)

1071

return True # Try again later

717

1072

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

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

1073

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

1074

self.name)

1075

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

1076

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

1077

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

1078

# always replaced by /dev/null.)

1079

# The exception is when not debugging but nevertheless

1080

# running in the foreground; use the previously

1081

# created wnull.

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

1085

if (not self.server_settings["debug"]

1086

and self.server_settings["foreground"]):

1087

popen_args.update({"stdout": wnull,

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

1090

self.checker = multiprocessing.Process(

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

1094

self.checker.start()

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

1097

self.checker_callback, pipe[0], command)

1098

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

760

1099

return True

761

1100

762

1101

def stop_checker(self):

763

1102

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

764

1103

if self.checker_callback_tag:

765

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

766

1105

self.checker_callback_tag = None

767

1106

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

768

1107

return

769

1108

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

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1109

self.checker.terminate()

778

1110

self.checker = None

779

1111

780

1112

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

783

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1118

become properties on the D-Bus.

785

1119

786

1120

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

787

1121

and with one argument by "Set".

788

1122

789

1123

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

790

1124

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

791

1125

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

794

1128

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

795

1129

if byte_arrays and signature != "ay":

796

1130

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

797

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

1131

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

1132

798

1133

def decorator(func):

799

1134

func._dbus_is_property = True

800

1135

func._dbus_interface = dbus_interface

803

1138

func._dbus_name = func.__name__

804

1139

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

805

1140

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

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

1142

return func

1143

808

1144

return decorator

809

1145

810

1146

811

1147

def dbus_interface_annotations(dbus_interface):

812

1148

"""Decorator for marking functions returning interface annotations

813

1149

814

1150

Usage:

815

1151

816

1152

@dbus_interface_annotations("org.example.Interface")

817

1153

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

818

1154

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

819

1155

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

820

1156

"false"}

821

1157

"""

1158

822

1159

def decorator(func):

823

1160

func._dbus_is_interface = True

824

1161

func._dbus_interface = dbus_interface

825

1162

func._dbus_name = dbus_interface

826

1163

return func

1164

827

1165

return decorator

828

1166

829

1167

830

1168

def dbus_annotations(annotations):

831

1169

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

832

1170

Usage:

833

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

834

1175

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

835

1176

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

1177

def Property_dbus_property(self):

840

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

841

1181

"""

1182

842

1183

def decorator(func):

843

1184

func._dbus_annotations = annotations

844

1185

return func

1186

845

1187

return decorator

846

1188

847

1189

848

1190

class DBusPropertyException(dbus.exceptions.DBusException):

849

1191

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

850

1192

"""

851

def __unicode__(self):

852

return unicode(str(self))

1193

pass

853

1194

854

1195

855

1196

class DBusPropertyAccessException(DBusPropertyException):

864

1205

pass

865

1206

866

1207

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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

1208

class DBusObjectWithAnnotations(dbus.service.Object):

1209

"""A D-Bus object with annotations.

1210

1211

Classes inheriting from this can use the dbus_annotations

1212

decorator to add annotations to methods or signals.

873

1213

"""

874

1214

875

1215

@staticmethod

876

1216

def _is_dbus_thing(thing):

877

1217

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

878

1218

879

1219

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

880

1220

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

881

1221

"""

882

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

1222

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

883

1223

False)

884

1224

885

1225

def _get_all_dbus_things(self, thing):

886

1226

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

887

1227

"""

888

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

889

name),

1228

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

890

1229

athing.__get__(self))

891

1230

for cls in self.__class__.__mro__

892

1231

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

1232

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

1233

1234

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

1238

def Introspect(self, object_path, connection):

1239

"""Overloading of standard D-Bus method.

1240

1241

Inserts annotation tags on methods and signals.

1242

"""

1243

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

1244

connection)

1245

try:

1246

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

1247

1248

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

1249

# Add annotation tags

1250

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

1251

for tag in if_tag.getElementsByTagName(typ):

1252

annots = dict()

1253

for name, prop in (self.

1254

_get_all_dbus_things(typ)):

1255

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

1256

and prop._dbus_interface

1257

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

1258

annots.update(getattr(

1259

prop, "_dbus_annotations", {}))

1260

for name, value in annots.items():

1261

ann_tag = document.createElement(

1262

"annotation")

1263

ann_tag.setAttribute("name", name)

1264

ann_tag.setAttribute("value", value)

1265

tag.appendChild(ann_tag)

1266

# Add interface annotation tags

1267

for annotation, value in dict(

1268

itertools.chain.from_iterable(

1269

annotations().items()

1270

for name, annotations

1271

in self._get_all_dbus_things("interface")

1272

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

1273

)).items():

1274

ann_tag = document.createElement("annotation")

1275

ann_tag.setAttribute("name", annotation)

1276

ann_tag.setAttribute("value", value)

1277

if_tag.appendChild(ann_tag)

1278

# Fix argument name for the Introspect method itself

1279

if (if_tag.getAttribute("name")

1280

== dbus.INTROSPECTABLE_IFACE):

1281

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

1282

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

1283

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

1284

if (arg.getAttribute("direction")

1285

== "out"):

1286

arg.setAttribute("name",

1287

"xml_data")

1288

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

1289

document.unlink()

1290

except (AttributeError, xml.dom.DOMException,

1291

xml.parsers.expat.ExpatError) as error:

1292

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

1293

exc_info=error)

1294

return xmlstring

1295

1296

1297

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1298

"""A D-Bus object with properties.

1299

1300

Classes inheriting from this can use the dbus_service_property

1301

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

1302

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

1303

"""

1304

896

1305

def _get_dbus_property(self, interface_name, property_name):

897

1306

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

898

1307

property with the specified name and interface.

899

1308

"""

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

1309

for cls in self.__class__.__mro__:

1310

for name, value in inspect.getmembers(

1311

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

904

1312

if (value._dbus_name == property_name

905

1313

and value._dbus_interface == interface_name):

906

1314

return value.__get__(self)

907

1315

908

1316

# No such property

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

1317

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

1318

self.dbus_object_path, interface_name, property_name))

1319

1320

@classmethod

1321

def _get_all_interface_names(cls):

1322

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

1323

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

1324

"_dbus_interface", None)

1325

for x in (inspect.getmro(cls))

1326

for attr in dir(x))

1327

if name is not None)

1328

1329

@dbus.service.method(dbus.PROPERTIES_IFACE,

1330

in_signature="ss",

914

1331

out_signature="v")

915

1332

def Get(self, interface_name, property_name):

916

1333

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

922

1339

if not hasattr(value, "variant_level"):

923

1340

return value

924

1341

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

925

1342

926

1343

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

927

1344

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

928

1345

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

934

1351

# The byte_arrays option is not supported yet on

935

1352

# signatures other than "ay".

936

1353

if prop._dbus_signature != "ay":

937

raise ValueError

1354

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

1355

"'ay' signature {!r}"

1356

.format(prop._dbus_signature))

938

1357

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

939

1358

for byte in value))

940

1359

prop(value)

941

942

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

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

943

1363

out_signature="a{sv}")

944

1364

def GetAll(self, interface_name):

945

1365

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

946

1366

standard.

947

1367

948

1368

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

949

1369

"""

950

1370

properties = {}

960

1380

if not hasattr(value, "variant_level"):

961

1381

properties[name] = value

962

1382

continue

963

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

964

value.variant_level+1)

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

965

1385

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

966

1386

1387

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

1388

def PropertiesChanged(self, interface_name, changed_properties,

1389

invalidated_properties):

1390

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

1391

standard.

1392

"""

1393

pass

1394

967

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

968

1396

out_signature="s",

969

1397

path_keyword='object_path',

970

1398

connection_keyword='connection')

971

1399

def Introspect(self, object_path, connection):

972

1400

"""Overloading of standard D-Bus method.

973

1401

974

1402

Inserts property tags and interface annotation tags.

975

1403

"""

976

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

977

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

978

1407

try:

979

1408

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

1409

980

1410

def make_tag(document, name, prop):

981

1411

e = document.createElement("property")

982

1412

e.setAttribute("name", name)

983

1413

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

984

1414

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

985

1415

return e

1416

986

1417

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

987

1418

# Add property tags

988

1419

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

991

1422

if prop._dbus_interface

992

1423

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

993

1424

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

1425

# Add annotation tags for properties

1426

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

1427

annots = dict()

1428

for name, prop in self._get_all_dbus_things(

1429

"property"):

1430

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

1431

and prop._dbus_interface

1432

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

1433

annots.update(getattr(

1434

prop, "_dbus_annotations", {}))

1435

for name, value in annots.items():

1436

ann_tag = document.createElement(

1437

"annotation")

1438

ann_tag.setAttribute("name", name)

1439

ann_tag.setAttribute("value", value)

1440

tag.appendChild(ann_tag)

1025

1441

# Add the names to the return values for the

1026

1442

# "org.freedesktop.DBus.Properties" methods

1027

1443

if (if_tag.getAttribute("name")

1046

1462

return xmlstring

1047

1463

1048

1464

1465

try:

1466

dbus.OBJECT_MANAGER_IFACE

1467

except AttributeError:

1468

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

1469

1470

1471

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1472

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

1473

1474

Classes inheriting from this exposes the standard

1475

GetManagedObjects call and the InterfacesAdded and

1476

InterfacesRemoved signals on the standard

1477

"org.freedesktop.DBus.ObjectManager" interface.

1478

1479

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

1480

manually.

1481

"""

1482

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1483

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

1484

def GetManagedObjects(self):

1485

"""This function must be overridden"""

1486

raise NotImplementedError()

1487

1488

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1489

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

1490

def InterfacesAdded(self, object_path, interfaces_and_properties):

1491

pass

1492

1493

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

1494

def InterfacesRemoved(self, object_path, interfaces):

1495

pass

1496

1497

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1501

def Introspect(self, object_path, connection):

1502

"""Overloading of standard D-Bus method.

1503

1504

Override return argument name of GetManagedObjects to be

1505

"objpath_interfaces_and_properties"

1506

"""

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

1510

try:

1511

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

1512

1513

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

1514

# Fix argument name for the GetManagedObjects method

1515

if (if_tag.getAttribute("name")

1516

== dbus.OBJECT_MANAGER_IFACE):

1517

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

1518

if (cn.getAttribute("name")

1519

== "GetManagedObjects"):

1520

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

1521

if (arg.getAttribute("direction")

1522

== "out"):

1523

arg.setAttribute(

1524

"name",

1525

"objpath_interfaces"

1526

"_and_properties")

1527

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

1528

document.unlink()

1529

except (AttributeError, xml.dom.DOMException,

1530

xml.parsers.expat.ExpatError) as error:

1531

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

1532

exc_info=error)

1533

return xmlstring

1534

1535

1049

1536

def datetime_to_dbus(dt, variant_level=0):

1050

1537

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

1051

1538

if dt is None:

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1539

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

1540

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

1055

1541

1056

1542

1057

1543

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

1545

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

1060

1546

interface names according to the "alt_interface_names" mapping.

1061

1547

Usage:

1062

1548

1063

1549

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

1064

1550

"net.example.AlternateInterface"})

1065

1551

class SampleDBusObject(dbus.service.Object):

1066

1552

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

1067

1553

def SampleDBusMethod():

1068

1554

pass

1069

1555

1070

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

1557

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

1072

1558

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

1073

1559

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

1074

1560

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

1075

1561

1076

1562

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

1077

1563

(from DBusObjectWithProperties) and interfaces (from the

1078

1564

dbus_interface_annotations decorator).

1079

1565

"""

1566

1080

1567

def wrapper(cls):

1081

1568

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1569

alt_interface_names.items()):

1083

1570

attr = {}

1084

1571

interface_names = set()

1085

1572

# Go though all attributes of the class

1087

1574

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

1088

1575

# with the wrong interface name

1089

1576

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1577

or not attribute._dbus_interface.startswith(

1578

orig_interface_name)):

1092

1579

continue

1093

1580

# Create an alternate D-Bus interface name based on

1094

1581

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1582

alt_interface = attribute._dbus_interface.replace(

1583

orig_interface_name, alt_interface_name)

1098

1584

interface_names.add(alt_interface)

1099

1585

# Is this a D-Bus signal?

1100

1586

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

1101

1587

# Extract the original non-method undecorated

1102

1588

# function by black magic

1103

nonmethod_func = (dict(

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

1104

1591

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1592

attribute.__closure__))

1593

["func"].cell_contents)

1594

else:

1595

nonmethod_func = (dict(

1596

zip(attribute.__code__.co_freevars,

1597

attribute.__closure__))

1598

["func"].cell_contents)

1107

1599

# Create a new, but exactly alike, function

1108

1600

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

1109

1601

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1602

new_function = copy_function(nonmethod_func)

1603

new_function = (dbus.service.signal(

1604

alt_interface,

1605

attribute._dbus_signature)(new_function))

1119

1606

# Copy annotations, if any

1120

1607

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1608

new_function._dbus_annotations = dict(

1609

attribute._dbus_annotations)

1123

1610

except AttributeError:

1124

1611

pass

1612

1125

1613

# Define a creator of a function to call both the

1126

1614

# original and alternate functions, so both the

1127

1615

# original and alternate signals gets sent when

1130

1618

"""This function is a scope container to pass

1131

1619

func1 and func2 to the "call_both" function

1132

1620

outside of its arguments"""

1621

1622

@functools.wraps(func2)

1133

1623

def call_both(*args, **kwargs):

1134

1624

"""This function will emit two D-Bus

1135

1625

signals by calling func1 and func2"""

1136

1626

func1(*args, **kwargs)

1137

1627

func2(*args, **kwargs)

1628

# Make wrapper function look like a D-Bus

1629

# signal

1630

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

1631

if name.startswith("_dbus_"):

1632

setattr(call_both, name, attr)

1633

1138

1634

return call_both

1139

1635

# Create the "call_both" function and add it to

1140

1636

# the class

1145

1641

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

1146

1642

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

1147

1643

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1644

attr[attrname] = (

1645

dbus.service.method(

1646

alt_interface,

1647

attribute._dbus_in_signature,

1648

attribute._dbus_out_signature)

1649

(copy_function(attribute)))

1158

1650

# Copy annotations, if any

1159

1651

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1652

attr[attrname]._dbus_annotations = dict(

1653

attribute._dbus_annotations)

1162

1654

except AttributeError:

1163

1655

pass

1164

1656

# Is this a D-Bus property?

1167

1659

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

1168

1660

# property with the alternate D-Bus interface

1169

1661

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1662

attr[attrname] = (dbus_service_property(

1663

alt_interface, attribute._dbus_signature,

1664

attribute._dbus_access,

1665

attribute._dbus_get_args_options

1666

["byte_arrays"])

1667

(copy_function(attribute)))

1183

1668

# Copy annotations, if any

1184

1669

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1670

attr[attrname]._dbus_annotations = dict(

1671

attribute._dbus_annotations)

1187

1672

except AttributeError:

1188

1673

pass

1189

1674

# Is this a D-Bus interface?

1192

1677

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

1193

1678

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

1194

1679

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1680

attr[attrname] = (

1681

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1203

1683

if deprecate:

1204

1684

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1206

1686

for interface_name in interface_names:

1687

1207

1688

@dbus_interface_annotations(interface_name)

1208

1689

def func(self):

1209

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

1210

"true" }

1690

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

1691

"true"}

1211

1692

# Find an unused name

1212

1693

for aname in (iname.format(i)

1213

1694

for i in itertools.count()):

1217

1698

if interface_names:

1218

1699

# Replace the class with a new subclass of it with

1219

1700

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1701

if sys.version_info.major == 2:

1702

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

1703

(cls, ), attr)

1704

else:

1705

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

1706

(cls, ), attr)

1222

1707

return cls

1708

1223

1709

return wrapper

1224

1710

1225

1711

1226

1712

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

1227

"se.bsnet.fukt.Mandos"})

1713

"se.bsnet.fukt.Mandos"})

1228

1714

class ClientDBus(Client, DBusObjectWithProperties):

1229

1715

"""A Client class using D-Bus

1230

1716

1231

1717

Attributes:

1232

1718

dbus_object_path: dbus.ObjectPath

1233

1719

bus: dbus.SystemBus()

1234

1720

"""

1235

1721

1236

1722

runtime_expansions = (Client.runtime_expansions

1237

+ ("dbus_object_path",))

1238

1723

+ ("dbus_object_path", ))

1724

1725

_interface = "se.recompile.Mandos.Client"

1726

1239

1727

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

1240

1241

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

1728

1729

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

1242

1730

self.bus = bus

1243

1731

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

1244

1732

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

1245

1733

# the D-Bus

1246

client_object_name = unicode(self.name).translate(

1734

client_object_name = str(self.name).translate(

1247

1735

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

1248

1736

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

1249

self.dbus_object_path = (dbus.ObjectPath

1250

("/clients/" + client_object_name))

1737

self.dbus_object_path = dbus.ObjectPath(

1738

"/clients/" + client_object_name)

1251

1739

DBusObjectWithProperties.__init__(self, self.bus,

1252

1740

self.dbus_object_path)

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1741

1742

def notifychangeproperty(transform_func, dbus_name,

1743

type_func=lambda x: x,

1744

variant_level=1,

1745

invalidate_only=False,

1746

_interface=_interface):

1257

1747

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

1258

1748

its changes to DBus.

1259

1749

1260

1750

transform_fun: Function that takes a value and a variant_level

1261

1751

and transforms it to a D-Bus type.

1262

1752

dbus_name: D-Bus name of the variable

1264

1754

to the D-Bus. Default: no transform

1265

1755

variant_level: D-Bus variant level. Default: 1

1266

1756

"""

1267

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

1757

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

1758

1268

1759

def setter(self, value):

1269

1760

if hasattr(self, "dbus_object_path"):

1270

1761

if (not hasattr(self, attrname) or

1271

1762

type_func(getattr(self, attrname, None))

1272

1763

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1764

if invalidate_only:

1765

self.PropertiesChanged(

1766

_interface, dbus.Dictionary(),

1767

dbus.Array((dbus_name, )))

1768

else:

1769

dbus_value = transform_func(

1770

type_func(value),

1771

variant_level=variant_level)

1772

self.PropertyChanged(dbus.String(dbus_name),

1773

dbus_value)

1774

self.PropertiesChanged(

1775

_interface,

1776

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

1777

dbus_value}),

1778

dbus.Array())

1278

1779

setattr(self, attrname, value)

1279

1780

1280

1781

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

1281

1782

1282

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1283

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1284

1785

"ApprovalPending",

1285

type_func = bool)

1786

type_func=bool)

1286

1787

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

1287

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

1789

"LastEnabled")

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1790

checker = notifychangeproperty(

1791

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1292

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

1794

"LastCheckedOK")

1294

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1297

1798

datetime_to_dbus, "LastApprovalRequest")

1298

1799

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

1800

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1801

approval_delay = notifychangeproperty(

1802

dbus.UInt64, "ApprovalDelay",

1803

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

1304

1804

approval_duration = notifychangeproperty(

1305

1805

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

1806

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

1307

1807

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1808

timeout = notifychangeproperty(

1809

dbus.UInt64, "Timeout",

1810

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

1311

1811

extended_timeout = notifychangeproperty(

1312

1812

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1813

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

1814

interval = notifychangeproperty(

1815

dbus.UInt64, "Interval",

1816

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

1318

1817

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

1319

1818

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

1819

invalidate_only=True)

1820

1320

1821

del notifychangeproperty

1321

1822

1322

1823

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

1323

1824

try:

1324

1825

self.remove_from_connection()

1327

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1328

1829

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

1329

1830

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

1330

1331

def checker_callback(self, pid, condition, command,

1332

*args, **kwargs):

1333

self.checker_callback_tag = None

1334

self.checker = None

1335

if os.WIFEXITED(condition):

1336

exitstatus = os.WEXITSTATUS(condition)

1831

1832

def checker_callback(self, source, condition,

1833

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

1834

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

1835

connection, command, *args,

1836

**kwargs)

1837

exitstatus = self.last_checker_status

1838

if exitstatus >= 0:

1337

1839

# Emit D-Bus signal

1338

1840

self.CheckerCompleted(dbus.Int16(exitstatus),

1339

dbus.Int64(condition),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1340

1843

dbus.String(command))

1341

1844

else:

1342

1845

# Emit D-Bus signal

1343

1846

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

1344

dbus.Int64(condition),

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1345

1851

dbus.String(command))

1346

1347

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

1348

*args, **kwargs)

1349

1852

return ret

1853

1350

1854

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

1351

old_checker = self.checker

1352

if self.checker is not None:

1353

old_checker_pid = self.checker.pid

1354

else:

1355

old_checker_pid = None

1855

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

1356

1856

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

1357

1857

# Only if new checker process was started

1358

1858

if (self.checker is not None

1360

1860

# Emit D-Bus signal

1361

1861

self.CheckerStarted(self.current_checker_command)

1362

1862

return r

1363

1863

1364

1864

def _reset_approved(self):

1365

1865

self.approved = None

1366

1866

return False

1367

1867

1368

1868

def approve(self, value=True):

1369

1869

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1870

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

1871

* 1000), self._reset_approved)

1373

1872

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

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1387

1880

# CheckerCompleted - signal

1388

1881

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

1389

1882

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

1390

1883

"D-Bus signal"

1391

1884

pass

1392

1885

1393

1886

# CheckerStarted - signal

1394

1887

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

1395

1888

def CheckerStarted(self, command):

1396

1889

"D-Bus signal"

1397

1890

pass

1398

1891

1399

1892

# PropertyChanged - signal

1893

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

1400

1894

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

1401

1895

def PropertyChanged(self, property, value):

1402

1896

"D-Bus signal"

1403

1897

pass

1404

1898

1405

1899

# GotSecret - signal

1406

1900

@dbus.service.signal(_interface)

1407

1901

def GotSecret(self):

1410

1904

server to mandos-client

1411

1905

"""

1412

1906

pass

1413

1907

1414

1908

# Rejected - signal

1415

1909

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

1416

1910

def Rejected(self, reason):

1417

1911

"D-Bus signal"

1418

1912

pass

1419

1913

1420

1914

# NeedApproval - signal

1421

1915

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

1422

1916

def NeedApproval(self, timeout, default):

1423

1917

"D-Bus signal"

1424

1918

return self.need_approval()

1425

1426

## Methods

1427

1919

1920

# Methods

1921

1428

1922

# Approve - method

1429

1923

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

1430

1924

def Approve(self, value):

1431

1925

self.approve(value)

1432

1926

1433

1927

# CheckedOK - method

1434

1928

@dbus.service.method(_interface)

1435

1929

def CheckedOK(self):

1436

1930

self.checked_ok()

1437

1931

1438

1932

# Enable - method

1933

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

1439

1934

@dbus.service.method(_interface)

1440

1935

def Enable(self):

1441

1936

"D-Bus method"

1442

1937

self.enable()

1443

1938

1444

1939

# StartChecker - method

1940

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

1445

1941

@dbus.service.method(_interface)

1446

1942

def StartChecker(self):

1447

1943

"D-Bus method"

1448

1944

self.start_checker()

1449

1945

1450

1946

# Disable - method

1947

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

1451

1948

@dbus.service.method(_interface)

1452

1949

def Disable(self):

1453

1950

"D-Bus method"

1454

1951

self.disable()

1455

1952

1456

1953

# StopChecker - method

1954

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

1457

1955

@dbus.service.method(_interface)

1458

1956

def StopChecker(self):

1459

1957

self.stop_checker()

1460

1461

## Properties

1462

1958

1959

# Properties

1960

1463

1961

# ApprovalPending - property

1464

1962

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

1465

1963

def ApprovalPending_dbus_property(self):

1466

1964

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

1467

1965

1468

1966

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

1967

@dbus_service_property(_interface,

1968

signature="b",

1470

1969

access="readwrite")

1471

1970

def ApprovedByDefault_dbus_property(self, value=None):

1472

1971

if value is None: # get

1473

1972

return dbus.Boolean(self.approved_by_default)

1474

1973

self.approved_by_default = bool(value)

1475

1974

1476

1975

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

1976

@dbus_service_property(_interface,

1977

signature="t",

1478

1978

access="readwrite")

1479

1979

def ApprovalDelay_dbus_property(self, value=None):

1480

1980

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1981

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

1982

* 1000)

1482

1983

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

1483

1984

1484

1985

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

1986

@dbus_service_property(_interface,

1987

signature="t",

1486

1988

access="readwrite")

1487

1989

def ApprovalDuration_dbus_property(self, value=None):

1488

1990

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1991

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

1992

* 1000)

1491

1993

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

1492

1994

1493

1995

# Name - property

1996

@dbus_annotations(

1997

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

1494

1998

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

1495

1999

def Name_dbus_property(self):

1496

2000

return dbus.String(self.name)

1497

2001

1498

2002

# Fingerprint - property

2003

@dbus_annotations(

2004

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

1499

2005

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

1500

2006

def Fingerprint_dbus_property(self):

1501

2007

return dbus.String(self.fingerprint)

1502

2008

1503

2009

# Host - property

1504

@dbus_service_property(_interface, signature="s",

2010

@dbus_service_property(_interface,

2011

signature="s",

1505

2012

access="readwrite")

1506

2013

def Host_dbus_property(self, value=None):

1507

2014

if value is None: # get

1508

2015

return dbus.String(self.host)

1509

self.host = unicode(value)

1510

2016

self.host = str(value)

2017

1511

2018

# Created - property

2019

@dbus_annotations(

2020

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

1512

2021

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

1513

2022

def Created_dbus_property(self):

1514

2023

return datetime_to_dbus(self.created)

1515

2024

1516

2025

# LastEnabled - property

1517

2026

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

1518

2027

def LastEnabled_dbus_property(self):

1519

2028

return datetime_to_dbus(self.last_enabled)

1520

2029

1521

2030

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

2031

@dbus_service_property(_interface,

2032

signature="b",

1523

2033

access="readwrite")

1524

2034

def Enabled_dbus_property(self, value=None):

1525

2035

if value is None: # get

1528

2038

self.enable()

1529

2039

else:

1530

2040

self.disable()

1531

2041

1532

2042

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2043

@dbus_service_property(_interface,

2044

signature="s",

1534

2045

access="readwrite")

1535

2046

def LastCheckedOK_dbus_property(self, value=None):

1536

2047

if value is not None:

1537

2048

self.checked_ok()

1538

2049

return

1539

2050

return datetime_to_dbus(self.last_checked_ok)

1540

2051

1541

2052

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2053

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

1544

2054

def LastCheckerStatus_dbus_property(self):

1545

2055

return dbus.Int16(self.last_checker_status)

1546

2056

1547

2057

# Expires - property

1548

2058

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

1549

2059

def Expires_dbus_property(self):

1550

2060

return datetime_to_dbus(self.expires)

1551

2061

1552

2062

# LastApprovalRequest - property

1553

2063

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

1554

2064

def LastApprovalRequest_dbus_property(self):

1555

2065

return datetime_to_dbus(self.last_approval_request)

1556

2066

1557

2067

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2068

@dbus_service_property(_interface,

2069

signature="t",

1559

2070

access="readwrite")

1560

2071

def Timeout_dbus_property(self, value=None):

1561

2072

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2073

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

1563

2074

old_timeout = self.timeout

1564

2075

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

1565

2076

# Reschedule disabling

1573

2084

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

1574

2085

is None):

1575

2086

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

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

2089

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

2090

self.disable)

2091

1582

2092

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2093

@dbus_service_property(_interface,

2094

signature="t",

1584

2095

access="readwrite")

1585

2096

def ExtendedTimeout_dbus_property(self, value=None):

1586

2097

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2098

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

2099

* 1000)

1588

2100

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

1589

2101

1590

2102

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2103

@dbus_service_property(_interface,

2104

signature="t",

1592

2105

access="readwrite")

1593

2106

def Interval_dbus_property(self, value=None):

1594

2107

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2108

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

1596

2109

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

1597

2110

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

1598

2111

return

1599

2112

if self.enabled:

1600

2113

# 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

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

2116

value, self.start_checker)

2117

self.start_checker() # Start one now, too

2118

1606

2119

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2120

@dbus_service_property(_interface,

2121

signature="s",

1608

2122

access="readwrite")

1609

2123

def Checker_dbus_property(self, value=None):

1610

2124

if value is None: # get

1611

2125

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1613

2126

self.checker_command = str(value)

2127

1614

2128

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2129

@dbus_service_property(_interface,

2130

signature="b",

1616

2131

access="readwrite")

1617

2132

def CheckerRunning_dbus_property(self, value=None):

1618

2133

if value is None: # get

1621

2136

self.start_checker()

1622

2137

else:

1623

2138

self.stop_checker()

1624

2139

1625

2140

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

1626

2144

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

1627

2145

def ObjectPath_dbus_property(self):

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1630

2148

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2149

@dbus_annotations(

2150

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

2151

"invalidates"})

2152

@dbus_service_property(_interface,

2153

signature="ay",

2154

access="write",

2155

byte_arrays=True)

1633

2156

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1635

2157

self.secret = bytes(value)

2158

1636

2159

del _interface

1637

2160

1638

2161

1641

2164

self._pipe = child_pipe

1642

2165

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

1643

2166

if not self._pipe.recv():

1644

raise KeyError()

1645

2167

raise KeyError(fpr)

2168

1646

2169

def __getattribute__(self, name):

1647

2170

if name == '_pipe':

1648

2171

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

1651

2174

if data[0] == 'data':

1652

2175

return data[1]

1653

2176

if data[0] == 'function':

2177

1654

2178

def func(*args, **kwargs):

1655

2179

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

1656

2180

return self._pipe.recv()[1]

2181

1657

2182

return func

1658

2183

1659

2184

def __setattr__(self, name, value):

1660

2185

if name == '_pipe':

1661

2186

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

1664

2189

1665

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

2191

"""A class to handle client connections.

1667

2192

1668

2193

Instantiated once for each connection to handle it.

1669

2194

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

1670

2195

1671

2196

def handle(self):

1672

2197

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

1673

2198

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

1674

unicode(self.client_address))

2199

str(self.client_address))

1675

2200

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

1676

2201

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"))

2202

2203

session = gnutls.ClientSession(self.request)

2204

2205

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

2206

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

2207

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

2208

# "+DHE-DSS"))

1692

2209

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

1693

2210

priority = self.server.gnutls_priority

1694

2211

if priority is None:

1695

2212

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1700

2217

# Start communication using the Mandos protocol

1701

2218

# Get protocol number

1702

2219

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

1707

2224

except (ValueError, IndexError, RuntimeError) as error:

1708

2225

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

1709

2226

return

1710

2227

1711

2228

# Start GnuTLS connection

1712

2229

try:

1713

2230

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1715

2232

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

1716

2233

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

1717

2234

# established. Just abandon the request.

1718

2235

return

1719

2236

logger.debug("Handshake succeeded")

1720

2237

1721

2238

approval_required = False

1722

2239

try:

1723

2240

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

2241

fpr = self.fingerprint(

2242

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1728

2244

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

1729

2245

return

1730

2246

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

1731

2247

1732

2248

try:

1733

2249

client = ProxyClient(child_pipe, fpr,

1734

2250

self.client_address)

1735

2251

except KeyError:

1736

2252

return

1737

2253

1738

2254

if client.approval_delay:

1739

2255

delay = client.approval_delay

1740

2256

client.approvals_pending += 1

1741

2257

approval_required = True

1742

2258

1743

2259

while True:

1744

2260

if not client.enabled:

1745

2261

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

1746

client.name)

2262

client.name)

1747

2263

if self.server.use_dbus:

1748

2264

# Emit D-Bus signal

1749

2265

client.Rejected("Disabled")

1750

2266

return

1751

2267

1752

2268

if client.approved or not client.approval_delay:

1753

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1754

2270

break

1755

2271

elif client.approved is None:

1756

2272

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

1758

2274

if self.server.use_dbus:

1759

2275

# Emit D-Bus signal

1760

2276

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2277

client.approval_delay.total_seconds()

2278

* 1000, client.approved_by_default)

1763

2279

else:

1764

2280

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

1765

2281

client.name)

1767

2283

# Emit D-Bus signal

1768

2284

client.Rejected("Denied")

1769

2285

return

1770

1771

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1772

2288

time = datetime.datetime.now()

1773

2289

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2290

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

1777

2291

client.changedstate.release()

1778

2292

time2 = datetime.datetime.now()

1779

2293

if (time2 - time) >= delay:

1789

2303

break

1790

2304

else:

1791

2305

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

2306

2307

try:

2308

session.send(client.secret)

2309

except gnutls.Error as error:

2310

logger.warning("gnutls send failed",

2311

exc_info=error)

2312

return

2313

1806

2314

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

1807

2315

# bump the timeout using extended_timeout

1808

2316

client.bump_timeout(client.extended_timeout)

1809

2317

if self.server.use_dbus:

1810

2318

# Emit D-Bus signal

1811

2319

client.GotSecret()

1812

2320

1813

2321

finally:

1814

2322

if approval_required:

1815

2323

client.approvals_pending -= 1

1816

2324

try:

1817

2325

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

2326

except gnutls.Error as error:

1819

2327

logger.warning("GnuTLS bye failed",

1820

2328

exc_info=error)

1821

2329

1822

2330

@staticmethod

1823

2331

def peer_certificate(session):

1824

2332

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

1825

2333

# 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

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1831

2338

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

1834

2340

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

1835

2341

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

1836

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

1837

" certificate")

2342

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

1838

2343

if list_size.value == 0:

1839

2344

return None

1840

2345

cert = cert_list[0]

1841

2346

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

1842

2347

1843

2348

@staticmethod

1844

2349

def fingerprint(openpgp):

1845

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2351

# 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))))

2352

datum = gnutls.datum_t(

2353

ctypes.cast(ctypes.c_char_p(openpgp),

2354

ctypes.POINTER(ctypes.c_ubyte)),

2355

ctypes.c_uint(len(openpgp)))

1852

2356

# 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)))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2359

# 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))

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1861

2362

# Verify the self signature in the key

1862

2363

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1866

2366

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError(code

2369

=crtverify.value)

1870

2370

# New buffer for the fingerprint

1871

2371

buf = ctypes.create_string_buffer(20)

1872

2372

buf_len = ctypes.c_size_t()

1873

2373

# 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)))

2374

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

2375

ctypes.byref(buf_len))

1877

2376

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

gnutls.openpgp_crt_deinit(crt)

1879

2378

# Convert the buffer to a Python bytestring

1880

2379

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

1881

2380

# Convert the bytestring to hexadecimal notation

1885

2384

1886

2385

class MultiprocessingMixIn(object):

1887

2386

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

2387

1888

2388

def sub_process_main(self, request, address):

1889

2389

try:

1890

2390

self.finish_request(request, address)

1891

2391

except Exception:

1892

2392

self.handle_error(request, address)

1893

2393

self.close_request(request)

1894

2394

1895

2395

def process_request(self, request, address):

1896

2396

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

1897

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

1898

args = (request, address))

2397

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

2398

args=(request, address))

1899

2399

proc.start()

1900

2400

return proc

1901

2401

1902

2402

1903

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

2404

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

2405

1905

2406

def process_request(self, request, client_address):

1906

2407

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

1907

2408

1908

2409

This function creates a new pipe in self.pipe

1909

2410

"""

1910

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

2412

1912

2413

proc = MultiprocessingMixIn.process_request(self, request,

1913

2414

client_address)

1914

2415

self.child_pipe.close()

1915

2416

self.add_pipe(parent_pipe, proc)

1916

2417

1917

2418

def add_pipe(self, parent_pipe, proc):

1918

2419

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

1919

2420

raise NotImplementedError()

1922

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

2424

socketserver.TCPServer, object):

1924

2425

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

1925

2426

1926

2427

Attributes:

1927

2428

enabled: Boolean; whether this server is activated yet

1928

2429

interface: None or a network interface name (string)

1929

2430

use_ipv6: Boolean; to use IPv6 or not

1930

2431

"""

2432

1931

2433

def __init__(self, server_address, RequestHandlerClass,

1932

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

2434

interface=None,

2435

use_ipv6=True,

2436

socketfd=None):

1933

2437

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

1934

2438

creating a new one with socket.socket().

1935

2439

"""

1941

2445

self.socketfd = socketfd

1942

2446

# Save the original socket.socket() function

1943

2447

self.socket_socket = socket.socket

2448

1944

2449

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

1945

#

2450

#

1946

2451

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

1947

2452

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

1948

2453

# patching socket.socket.)

1949

#

2454

#

1950

2455

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

1951

2456

@functools.wraps(socket.socket)

1952

2457

def socket_wrapper(*args, **kwargs):

1964

2469

# socket_wrapper(), if socketfd was set.

1965

2470

socketserver.TCPServer.__init__(self, server_address,

1966

2471

RequestHandlerClass)

1967

2472

1968

2473

def server_bind(self):

1969

2474

"""This overrides the normal server_bind() function

1970

2475

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

1971

2476

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

2477

global SO_BINDTODEVICE

1972

2478

if self.interface is not None:

1973

2479

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

2480

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

2481

# common enough.

2482

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

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

1995

2501

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

1996

2502

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

1997

2503

if not self.server_address[0]:

1998

2504

if self.address_family == socket.AF_INET6:

1999

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

2000

2506

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

2002

2508

self.server_address = (any_address,

2003

2509

self.server_address[1])

2004

2510

elif not self.server_address[1]:

2005

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

2006

0)

2511

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

2007

2512

# if self.interface:

2008

2513

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

2009

2514

# 0, # port

2015

2520

2016

2521

class MandosServer(IPv6_TCPServer):

2017

2522

"""Mandos server.

2018

2523

2019

2524

Attributes:

2020

2525

clients: set of Client objects

2021

2526

gnutls_priority GnuTLS priority string

2022

2527

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

2023

2024

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

2025

2530

"""

2531

2026

2532

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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

2533

interface=None,

2534

use_ipv6=True,

2535

clients=None,

2536

gnutls_priority=None,

2537

use_dbus=True,

2538

socketfd=None):

2029

2539

self.enabled = False

2030

2540

self.clients = clients

2031

2541

if self.clients is None:

2034

2544

self.gnutls_priority = gnutls_priority

2035

2545

IPv6_TCPServer.__init__(self, server_address,

2036

2546

RequestHandlerClass,

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2040

2551

def server_activate(self):

2041

2552

if self.enabled:

2042

2553

return socketserver.TCPServer.server_activate(self)

2043

2554

2044

2555

def enable(self):

2045

2556

self.enabled = True

2046

2557

2047

2558

def add_pipe(self, parent_pipe, proc):

2048

2559

# 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):

2560

GLib.io_add_watch(

2561

parent_pipe.fileno(),

2562

GLib.IO_IN | GLib.IO_HUP,

2563

functools.partial(self.handle_ipc,

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2567

def handle_ipc(self, source, condition,

2568

parent_pipe=None,

2569

proc=None,

2570

client_object=None):

2058

2571

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

2059

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

2572

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

2060

2573

# Wait for other process to exit

2061

2574

proc.join()

2062

2575

return False

2063

2576

2064

2577

# Read a request from the child

2065

2578

request = parent_pipe.recv()

2066

2579

command = request[0]

2067

2580

2068

2581

if command == 'init':

2069

fpr = request[1]

2582

fpr = request[1].decode("ascii")

2070

2583

address = request[2]

2071

2072

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

2073

2586

if c.fingerprint == fpr:

2074

2587

client = c

2075

2588

break

2082

2595

address[0])

2083

2596

parent_pipe.send(False)

2084

2597

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))

2598

2599

GLib.io_add_watch(

2600

parent_pipe.fileno(),

2601

GLib.IO_IN | GLib.IO_HUP,

2602

functools.partial(self.handle_ipc,

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2094

2606

parent_pipe.send(True)

2095

2607

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

2096

2608

# same fileno

2099

2611

funcname = request[1]

2100

2612

args = request[2]

2101

2613

kwargs = request[3]

2102

2614

2103

2615

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

2104

2616

funcname)(*args,

2105

**kwargs)))

2106

2617

**kwargs)))

2618

2107

2619

if command == 'getattr':

2108

2620

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2621

if isinstance(client_object.__getattribute__(attrname),

2622

collections.Callable):

2623

parent_pipe.send(('function', ))

2111

2624

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2625

parent_pipe.send((

2626

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

2627

2115

2628

if command == 'setattr':

2116

2629

attrname = request[1]

2117

2630

value = request[2]

2118

2631

setattr(client_object, attrname, value)

2119

2632

2120

2633

return True

2121

2634

2122

2635

2123

2636

def rfc3339_duration_to_delta(duration):

2124

2637

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

2125

2638

2126

2639

>>> rfc3339_duration_to_delta("P7D")

2127

2640

datetime.timedelta(7)

2128

2641

>>> rfc3339_duration_to_delta("PT60S")

2138

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

2652

datetime.timedelta(1, 200)

2140

2653

"""

2141

2654

2142

2655

# Parsing an RFC 3339 duration with regular expressions is not

2143

2656

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

2144

2657

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

2145

2658

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

2146

2659

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

2147

2660

# avoid excessive use of external libraries.

2148

2661

2149

2662

# 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

2663

Token = collections.namedtuple("Token", (

2664

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

2665

# a "group" containing digits

2666

"value", # datetime.timedelta or None

2667

"followers")) # Tokens valid after this token

2159

2668

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

2160

2669

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

2161

2670

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

2162

2671

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

2163

2672

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2673

frozenset((token_end, )))

2165

2674

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

2166

2675

datetime.timedelta(minutes=1),

2167

2676

frozenset((token_second, token_end)))

2183

2692

frozenset((token_month, token_end)))

2184

2693

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

2185

2694

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2695

frozenset((token_end, )))

2187

2696

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

2188

2697

frozenset((token_year, token_month,

2189

2698

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2699

token_week)))

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2193

2703

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2196

2708

# Loop until end token is found

2197

2709

while found_token is not token_end:

2198

2710

# Search for any currently valid tokens

2214

2726

break

2215

2727

else:

2216

2728

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2729

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

2730

.format(duration))

2218

2731

# End token found

2219

2732

return value

2220

2733

2221

2734

2222

2735

def string_to_delta(interval):

2223

2736

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

2224

2737

2225

2738

>>> string_to_delta('7d')

2226

2739

datetime.timedelta(7)

2227

2740

>>> string_to_delta('60s')

2235

2748

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

2236

2749

datetime.timedelta(0, 330)

2237

2750

"""

2238

2751

2239

2752

try:

2240

2753

return rfc3339_duration_to_delta(interval)

2241

2754

except ValueError:

2242

2755

pass

2243

2756

2244

2757

timevalue = datetime.timedelta(0)

2245

2758

for s in interval.split():

2246

2759

try:

2247

suffix = unicode(s[-1])

2760

suffix = s[-1]

2248

2761

value = int(s[:-1])

2249

2762

if suffix == "d":

2250

2763

delta = datetime.timedelta(value)

2257

2770

elif suffix == "w":

2258

2771

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

2259

2772

else:

2260

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

2261

.format(suffix))

2773

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

2262

2774

except IndexError as e:

2263

2775

raise ValueError(*(e.args))

2264

2776

timevalue += delta

2265

2777

return timevalue

2266

2778

2267

2779

2268

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

2780

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

2269

2781

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

2270

2782

2271

2783

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

2272

2784

if os.fork():

2273

2785

sys.exit()

2281

2793

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

2282

2794

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

2283

2795

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2796

"{} not a character device"

2285

2797

.format(os.devnull))

2286

2798

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

2287

2799

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

2291

2803

2292

2804

2293

2805

def main():

2294

2806

2295

2807

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

2296

2808

# Parsing of options, both command line and config file

2297

2809

2298

2810

parser = argparse.ArgumentParser()

2299

2811

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

2300

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

2812

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

2301

2813

help="show version number and exit")

2302

2814

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

2303

2815

help="Bind to interface IF")

2336

2848

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

2337

2849

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

2338

2850

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

2339

2851

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

2852

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

2853

default=None)

2854

2340

2855

options = parser.parse_args()

2341

2856

2342

2857

if options.check:

2343

2858

import doctest

2344

doctest.testmod()

2345

sys.exit()

2346

2859

fail_count, test_count = doctest.testmod()

2860

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

2861

2347

2862

# 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

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2364

2881

# Parse config file for server-global settings

2365

2882

server_config = configparser.SafeConfigParser(server_defaults)

2366

2883

del server_defaults

2367

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

2368

"mandos.conf"))

2884

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

2369

2885

# Convert the SafeConfigParser object to a dict

2370

2886

server_settings = server_config.defaults()

2371

2887

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

2372

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

2888

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

2889

"foreground", "zeroconf"):

2373

2890

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

2374

2891

option)

2375

2892

if server_settings["port"]:

2385

2902

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

2386

2903

["socket"])

2387

2904

del server_config

2388

2905

2389

2906

# Override the settings from the config file with command line

2390

2907

# options, if set.

2391

2908

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

2392

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

2393

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

2394

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

2909

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

2910

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

2911

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

2395

2912

value = getattr(options, option)

2396

2913

if value is not None:

2397

2914

server_settings[option] = value

2398

2915

del options

2399

2916

# Force all strings to be unicode

2400

2917

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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

2918

if isinstance(server_settings[option], bytes):

2919

server_settings[option] = (server_settings[option]

2920

.decode("utf-8"))

2403

2921

# Force all boolean options to be boolean

2404

2922

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

2405

"foreground"):

2923

"foreground", "zeroconf"):

2406

2924

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

2407

2925

# Debug implies foreground

2408

2926

if server_settings["debug"]:

2409

2927

server_settings["foreground"] = True

2410

2928

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

2411

2929

2412

2930

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

2413

2931

2932

if (not server_settings["zeroconf"]

2933

and not (server_settings["port"]

2934

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

2935

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

2936

2414

2937

# For convenience

2415

2938

debug = server_settings["debug"]

2416

2939

debuglevel = server_settings["debuglevel"]

2419

2942

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

2420

2943

stored_state_file)

2421

2944

foreground = server_settings["foreground"]

2422

2945

zeroconf = server_settings["zeroconf"]

2946

2423

2947

if debug:

2424

2948

initlogger(debug, logging.DEBUG)

2425

2949

else:

2428

2952

else:

2429

2953

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

2430

2954

initlogger(debug, level)

2431

2955

2432

2956

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

2957

syslogger.setFormatter(

2958

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

2959

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

2960

server_settings["servicename"])))

2961

2439

2962

# Parse config file with clients

2440

2963

client_config = configparser.SafeConfigParser(Client

2441

2964

.client_defaults)

2442

2965

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

2443

2966

"clients.conf"))

2444

2967

2445

2968

global mandos_dbus_service

2446

2969

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))

2970

2971

socketfd = None

2972

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

2973

socketfd = server_settings["socket"]

2974

tcp_server = MandosServer(

2975

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

2976

ClientHandler,

2977

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

2978

use_ipv6=use_ipv6,

2979

gnutls_priority=server_settings["priority"],

2980

use_dbus=use_dbus,

2981

socketfd=socketfd)

2459

2982

if not foreground:

2460

2983

pidfilename = "/run/mandos.pid"

2461

2984

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

2462

2985

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

2463

2986

pidfile = None

2464

2987

try:

2465

pidfile = open(pidfilename, "w")

2988

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

2466

2989

except IOError as e:

2467

2990

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

2468

2991

exc_info=e)

2469

2470

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

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2471

2996

try:

2472

2997

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2998

gid = pwd.getpwnam(group).pw_gid

2474

2999

break

2475

3000

except KeyError:

2476

3001

continue

2480

3005

try:

2481

3006

os.setgid(gid)

2482

3007

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

2483

3011

except OSError as error:

3012

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

3013

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

2484

3014

if error.errno != errno.EPERM:

2485

3015

raise

2486

3016

2487

3017

if debug:

2488

3018

# Enable all possible GnuTLS debugging

2489

3019

2490

3020

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

2491

3021

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2495

3025

def debug_gnutls(level, string):

2496

3026

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

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2501

3030

# Redirect stdin so all checkers get /dev/null

2502

3031

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

2503

3032

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

2504

3033

if null > 2:

2505

3034

os.close(null)

2506

3035

2507

3036

# Need to fork before connecting to D-Bus

2508

3037

if not foreground:

2509

3038

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

2510

3039

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

3040

3041

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

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2516

3045

global main_loop

2517

3046

# From the Avahi example code

2518

3047

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3048

main_loop = GLib.MainLoop()

2520

3049

bus = dbus.SystemBus()

2521

3050

# End of Avahi example code

2522

3051

if use_dbus:

2523

3052

try:

2524

3053

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:

3054

bus,

3055

do_not_queue=True)

3056

old_bus_name = dbus.service.BusName(

3057

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

3058

do_not_queue=True)

3059

except dbus.exceptions.DBusException as e:

2530

3060

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

2531

3061

use_dbus = False

2532

3062

server_settings["use_dbus"] = False

2533

3063

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

3064

if zeroconf:

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3066

service = AvahiServiceToSyslog(

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

3071

if server_settings["interface"]:

3072

service.interface = if_nametoindex(

3073

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

3074

2543

3075

global multiprocessing_manager

2544

3076

multiprocessing_manager = multiprocessing.Manager()

2545

3077

2546

3078

client_class = Client

2547

3079

if use_dbus:

2548

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

2549

3080

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

3081

2550

3082

client_settings = Client.config_parser(client_config)

2551

3083

old_client_settings = {}

2552

3084

clients_data = {}

2553

3085

2554

3086

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

2555

3087

global wnull

2556

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

3088

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

2557

3089

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

2558

3090

# mode

2559

3091

if debug or not foreground:

2560

3092

wnull.close()

2561

3093

2562

3094

# Get client data and settings from last running state.

2563

3095

if server_settings["restore"]:

2564

3096

try:

2565

3097

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

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

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

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

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

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

3115

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

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

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

3127

if isinstance(value[k], bytes):

3128

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

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

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

3141

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

3142

.decode("utf-8"))

2568

3143

os.remove(stored_state_path)

2569

3144

except IOError as e:

2570

3145

if e.errno == errno.ENOENT:

2571

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

2572

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

3146

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

3147

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

2573

3148

else:

2574

3149

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

2575

3150

exc_info=e)

2576

3151

raise

2577

3152

except EOFError as e:

2578

3153

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

2579

"EOFError:", exc_info=e)

2580

3154

"EOFError:",

3155

exc_info=e)

3156

2581

3157

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3158

for client_name, client in clients_data.items():

2583

3159

# Skip removed clients

2584

3160

if client_name not in client_settings:

2585

3161

continue

2586

3162

2587

3163

# Decide which value to use after restoring saved state.

2588

3164

# We have three different values: Old config file,

2589

3165

# new config file, and saved state.

2594

3170

# For each value in new config, check if it

2595

3171

# differs from the old config value (Except for

2596

3172

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3173

if (name != "secret"

3174

and (value !=

3175

old_client_settings[client_name][name])):

2600

3176

client[name] = value

2601

3177

except KeyError:

2602

3178

pass

2603

3179

2604

3180

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3181

# enabled if its last checker was successful. A Client

2606

3182

# whose checker succeeded before we stored its state is

2607

3183

# assumed to have successfully run all checkers during

2608

3184

# downtime.

2610

3186

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

2611

3187

if not client["last_checked_ok"]:

2612

3188

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3189

"disabling client {} - Client never "

3190

"performed a successful checker".format(

3191

client_name))

2616

3192

client["enabled"] = False

2617

3193

elif client["last_checker_status"] != 0:

2618

3194

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3195

"disabling client {} - Client last"

3196

" checker failed with error code"

3197

" {}".format(

3198

client_name,

3199

client["last_checker_status"]))

2623

3200

client["enabled"] = False

2624

3201

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3202

client["expires"] = (

3203

datetime.datetime.utcnow()

3204

+ client["timeout"])

2628

3205

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3206

" keeping {} enabled".format(

3207

client_name))

2631

3208

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3209

client["secret"] = pgp.decrypt(

3210

client["encrypted_secret"],

3211

client_settings[client_name]["secret"])

2636

3212

except PGPError:

2637

3213

# 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

3214

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

3215

client_name))

3216

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

3217

["secret"])

3218

2643

3219

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

2644

3220

for client_name in (set(old_client_settings)

2645

3221

- set(client_settings)):

2647

3223

for client_name in (set(client_settings)

2648

3224

- set(old_client_settings)):

2649

3225

clients_data[client_name] = client_settings[client_name]

2650

3226

2651

3227

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3228

for client_name, client in clients_data.items():

2653

3229

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2657

3234

if not tcp_server.clients:

2658

3235

logger.warning("No clients defined")

2659

3236

2660

3237

if not foreground:

2661

3238

if pidfile is not None:

3239

pid = os.getpid()

2662

3240

try:

2663

3241

with pidfile:

2664

pid = os.getpid()

2665

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

3242

print(pid, file=pidfile)

2666

3243

except IOError:

2667

3244

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

2668

3245

pidfilename, pid)

2669

3246

del pidfile

2670

3247

del pidfilename

2671

2672

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

2673

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

2674

3248

3249

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

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

2675

3253

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3254

3255

@alternate_dbus_interfaces(

3256

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

3257

class MandosDBusService(DBusObjectWithObjectManager):

2679

3258

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

3259

2680

3260

def __init__(self):

2681

3261

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

3262

2682

3263

_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

3264

2690

3265

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

2691

3266

def ClientAdded(self, objpath):

2692

3267

"D-Bus signal"

2693

3268

pass

2694

3269

2695

3270

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

2696

3271

def ClientNotFound(self, fingerprint, address):

2697

3272

"D-Bus signal"

2698

3273

pass

2699

3274

3275

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

3276

"true"})

2700

3277

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

2701

3278

def ClientRemoved(self, objpath, name):

2702

3279

"D-Bus signal"

2703

3280

pass

2704

3281

3282

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

3283

"true"})

2705

3284

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

2706

3285

def GetAllClients(self):

2707

3286

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3287

return dbus.Array(c.dbus_object_path for c in

3288

tcp_server.clients.values())

3289

3290

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

3291

"true"})

2712

3292

@dbus.service.method(_interface,

2713

3293

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

2714

3294

def GetAllClientsWithProperties(self):

2715

3295

"D-Bus method"

2716

3296

return dbus.Dictionary(

2717

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

2718

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

3297

{c.dbus_object_path: c.GetAll(

3298

"se.recompile.Mandos.Client")

3299

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

2719

3300

signature="oa{sv}")

2720

3301

2721

3302

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

2722

3303

def RemoveClient(self, object_path):

2723

3304

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

2725

3306

if c.dbus_object_path == object_path:

2726

3307

del tcp_server.clients[c.name]

2727

3308

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3309

# Don't signal the disabling

2729

3310

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3311

# Emit D-Bus signal for removal

3312

self.client_removed_signal(c)

2732

3313

return

2733

3314

raise KeyError(object_path)

2734

3315

2735

3316

del _interface

2736

3317

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3319

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

3320

def GetManagedObjects(self):

3321

"""D-Bus method"""

3322

return dbus.Dictionary(

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

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

3329

3330

def client_added_signal(self, client):

3331

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

3332

if use_dbus:

3333

# New standard signal

3334

self.InterfacesAdded(

3335

client.dbus_object_path,

3336

dbus.Dictionary(

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

3340

# Old signal

3341

self.ClientAdded(client.dbus_object_path)

3342

3343

def client_removed_signal(self, client):

3344

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

3345

if use_dbus:

3346

# New standard signal

3347

self.InterfacesRemoved(

3348

client.dbus_object_path,

3349

client._get_all_interface_names())

3350

# Old signal

3351

self.ClientRemoved(client.dbus_object_path,

3352

client.name)

3353

2737

3354

mandos_dbus_service = MandosDBusService()

2738

3355

3356

# Save modules to variables to exempt the modules from being

3357

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

3358

mp = multiprocessing

3359

wn = wnull

3360

2739

3361

def cleanup():

2740

3362

"Cleanup function; run on exit"

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3363

if zeroconf:

3364

service.cleanup()

3365

3366

mp.active_children()

3367

wn.close()

2745

3368

if not (tcp_server.clients or client_settings):

2746

3369

return

2747

3370

2748

3371

# Store client before exiting. Secrets are encrypted with key

2749

3372

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

2750

3373

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

2751

3374

clients = {}

2752

3375

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

2754

3377

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

2755

3378

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

2756

3379

key)

2757

3380

client_dict = {}

2758

3381

2759

3382

# A list of attributes that can not be pickled

2760

3383

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3384

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

3385

"checker", "server_settings"}

3386

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

3387

.Object):

2765

3388

exclude.add(name)

2766

3389

2767

3390

client_dict["encrypted_secret"] = (client

2768

3391

.encrypted_secret)

2769

3392

for attr in client.client_structure:

2770

3393

if attr not in exclude:

2771

3394

client_dict[attr] = getattr(client, attr)

2772

3395

2773

3396

clients[client.name] = client_dict

2774

3397

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

2775

3398

2776

3399

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

3400

with tempfile.NamedTemporaryFile(

3401

mode='wb',

3402

suffix=".pickle",

3403

prefix='clients-',

3404

dir=os.path.dirname(stored_state_path),

3405

delete=False) as stored_state:

3406

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

3407

protocol=2)

3408

tempname = stored_state.name

2783

3409

os.rename(tempname, stored_state_path)

2784

3410

except (IOError, OSError) as e:

2785

3411

if not debug:

2788

3414

except NameError:

2789

3415

pass

2790

3416

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

2791

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

3417

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

2792

3418

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

2793

3419

else:

2794

3420

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

2795

3421

exc_info=e)

2796

3422

raise

2797

3423

2798

3424

# Delete all clients, and settings from config

2799

3425

while tcp_server.clients:

2800

3426

name, client = tcp_server.clients.popitem()

2801

3427

if use_dbus:

2802

3428

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3429

# Don't signal the disabling

2804

3430

client.disable(quiet=True)

3431

# Emit D-Bus signal for removal

2805

3432

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3433

mandos_dbus_service.client_removed_signal(client)

2810

3434

client_settings.clear()

2811

3435

2812

3436

atexit.register(cleanup)

2813

2814

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

2815

3439

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

# Emit D-Bus signal for adding

3441

mandos_dbus_service.client_added_signal(client)

2818

3442

# Need to initiate checking of clients

2819

3443

if client.enabled:

2820

3444

client.init_checker()

2821

3445

2822

3446

tcp_server.enable()

2823

3447

tcp_server.server_activate()

2824

3448

2825

3449

# Find out what port we got

2826

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

3450

if zeroconf:

3451

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

2827

3452

if use_ipv6:

2828

3453

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

2829

3454

" flowinfo %d, scope_id %d",

2831

3456

else: # IPv4

2832

3457

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

2833

3458

*tcp_server.socket.getsockname())

2834

2835

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

2836

3459

3460

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

3461

2837

3462

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

3463

if zeroconf:

3464

# From the Avahi example code

3465

try:

3466

service.activate()

3467

except dbus.exceptions.DBusException as error:

3468

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

3469

cleanup()

3470

sys.exit(1)

3471

# End of Avahi example code

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

2852

3478

logger.debug("Starting main loop")

2853

3479

main_loop.run()

2854

3480

except AvahiError as error:

2863

3489

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

2864

3490

cleanup()

2865

3491

3492

2866

3493

if __name__ == '__main__':

2867

3494

main()