/mandos/trunk : revision 938

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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 = "1.6.0"

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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 = "1.7.18"

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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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return b"mandos" + binascii.hexlify(password)

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(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

218

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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352

self.name = name

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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"""

271

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)

275

372

raise AvahiServiceError("Too many renames")

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

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376

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

279

377

self.name)

280

self.remove()

378

if remove:

379

self.remove()

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380

try:

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381

self.add()

283

382

except dbus.exceptions.DBusException as error:

284

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

285

self.cleanup()

286

os._exit(1)

287

self.rename_count += 1

288

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

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392

def remove(self):

290

393

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

291

394

if self.entry_group_state_changed_match is not None:

293

396

self.entry_group_state_changed_match = None

294

397

if self.group is not None:

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398

self.group.Reset()

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399

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400

def add(self):

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401

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

299

402

self.remove()

316

419

dbus.UInt16(self.port),

317

420

avahi.string_array_to_txt_array(self.TXT))

318

421

self.group.Commit()

319

422

320

423

def entry_group_state_changed(self, state, error):

321

424

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

322

425

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

323

426

324

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

325

428

logger.debug("Zeroconf service established.")

326

429

elif state == avahi.ENTRY_GROUP_COLLISION:

328

431

self.rename()

329

432

elif state == avahi.ENTRY_GROUP_FAILURE:

330

433

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

331

unicode(error))

332

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

333

.format(error))

334

434

str(error))

435

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

436

335

437

def cleanup(self):

336

438

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

337

439

if self.group is not None:

342

444

pass

343

445

self.group = None

344

446

self.remove()

345

447

346

448

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

347

449

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

348

450

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

349

bad_states = { avahi.SERVER_INVALID:

350

"Zeroconf server invalid",

351

avahi.SERVER_REGISTERING: None,

352

avahi.SERVER_COLLISION:

353

"Zeroconf server name collision",

354

avahi.SERVER_FAILURE:

355

"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

}

356

457

if state in bad_states:

357

458

if bad_states[state] is not None:

358

459

if error is None:

361

462

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

362

463

self.cleanup()

363

464

elif state == avahi.SERVER_RUNNING:

364

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)

365

477

else:

366

478

if error is None:

367

479

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

368

480

else:

369

481

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

370

482

371

483

def activate(self):

372

484

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

373

485

if self.server is None:

377

489

follow_name_owner_changes=True),

378

490

avahi.DBUS_INTERFACE_SERVER)

379

491

self.server.connect_to_signal("StateChanged",

380

self.server_state_changed)

492

self.server_state_changed)

381

493

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

382

494

383

495

384

496

class AvahiServiceToSyslog(AvahiService):

385

def rename(self):

497

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

386

498

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

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.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)))

392

503

return ret

393

504

394

505

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

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

398

+ (td.seconds * 1000)

399

+ (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()

400

778

401

779

402

780

class Client(object):

403

781

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

404

782

405

783

Attributes:

406

784

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

407

785

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

409

787

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

410

788

to see if the client lives.

411

789

'None' if no process is running.

412

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

413

791

checker_command: string; External command which is run to check

414

792

if client lives. %() expansions are done at

415

793

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

416

794

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

417

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

418

796

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

419

797

client_structure: Object describing what attributes a client has

420

798

and is used for storing the client at exit

421

799

current_checker_command: string; current running checker_command

422

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

423

801

enabled: bool()

424

802

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

425

803

uniquely identify the client

430

808

last_checker_status: integer between 0 and 255 reflecting exit

431

809

status of last checker. -1 reflects crashed

432

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

433

813

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

434

814

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

435

815

D-Bus identifiers

440

820

runtime_expansions: Allowed attributes for runtime expansion.

441

821

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

442

822

disabled, or None

823

server_settings: The server_settings dict from main()

443

824

"""

444

825

445

826

runtime_expansions = ("approval_delay", "approval_duration",

446

827

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

447

828

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

448

829

"last_approval_request", "last_checked_ok",

449

830

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

450

client_defaults = { "timeout": "PT5M",

451

"extended_timeout": "PT15M",

452

"interval": "PT2M",

453

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

454

"host": "",

455

"approval_delay": "PT0S",

456

"approval_duration": "PT1S",

457

"approved_by_default": "True",

458

"enabled": "True",

459

}

460

461

def timeout_milliseconds(self):

462

"Return the 'timeout' attribute in milliseconds"

463

return timedelta_to_milliseconds(self.timeout)

464

465

def extended_timeout_milliseconds(self):

466

"Return the 'extended_timeout' attribute in milliseconds"

467

return timedelta_to_milliseconds(self.extended_timeout)

468

469

def interval_milliseconds(self):

470

"Return the 'interval' attribute in milliseconds"

471

return timedelta_to_milliseconds(self.interval)

472

473

def approval_delay_milliseconds(self):

474

return timedelta_to_milliseconds(self.approval_delay)

475

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

476

843

@staticmethod

477

844

def config_parser(config):

478

845

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

485

852

for client_name in config.sections():

486

853

section = dict(config.items(client_name))

487

854

client = settings[client_name] = {}

488

855

489

856

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

490

857

# Reformat values from string types to Python types

491

858

client["approved_by_default"] = config.getboolean(

492

859

client_name, "approved_by_default")

493

860

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

494

861

"enabled")

495

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

496

866

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

497

867

.replace(" ", ""))

498

868

if "secret" in section:

499

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

869

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

870

.encode("utf-8"),

871

"base64")

500

872

elif "secfile" in section:

501

873

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

502

874

(section["secfile"])),

503

875

"rb") as secfile:

504

876

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

505

877

else:

506

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

878

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

507

879

.format(section))

508

880

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

509

881

client["extended_timeout"] = string_to_delta(

517

889

client["last_approval_request"] = None

518

890

client["last_checked_ok"] = None

519

891

client["last_checker_status"] = -2

520

892

521

893

return settings

522

523

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

894

895

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

524

896

self.name = name

897

if server_settings is None:

898

server_settings = {}

899

self.server_settings = server_settings

525

900

# adding all client settings

526

for setting, value in settings.iteritems():

901

for setting, value in settings.items():

527

902

setattr(self, setting, value)

528

903

529

904

if self.enabled:

530

905

if not hasattr(self, "last_enabled"):

531

906

self.last_enabled = datetime.datetime.utcnow()

535

910

else:

536

911

self.last_enabled = None

537

912

self.expires = None

538

913

539

914

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

540

# Uppercase and remove spaces from fingerprint for later

541

# comparison purposes with return value from the fingerprint()

542

# function

543

915

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

544

916

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

545

917

datetime.datetime.utcnow())

546

918

547

919

# attributes specific for this server instance

548

920

self.checker = None

549

921

self.checker_initiator_tag = None

552

924

self.current_checker_command = None

553

925

self.approved = None

554

926

self.approvals_pending = 0

555

self.changedstate = (multiprocessing_manager

556

.Condition(multiprocessing_manager

557

.Lock()))

558

self.client_structure = [attr for attr in

559

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()

560

931

if not attr.startswith("_")]

561

932

self.client_structure.append("client_structure")

562

563

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

564

lambda obj:

565

isinstance(obj,

566

property)):

933

934

for name, t in inspect.getmembers(

935

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

567

936

if not name.startswith("_"):

568

937

self.client_structure.append(name)

569

938

570

939

# Send notice to process children that client state has changed

571

940

def send_changedstate(self):

572

941

with self.changedstate:

573

942

self.changedstate.notify_all()

574

943

575

944

def enable(self):

576

945

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

577

946

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

582

951

self.last_enabled = datetime.datetime.utcnow()

583

952

self.init_checker()

584

953

self.send_changedstate()

585

954

586

955

def disable(self, quiet=True):

587

956

"""Disable this client."""

588

957

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

590

959

if not quiet:

591

960

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

592

961

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

593

gobject.source_remove(self.disable_initiator_tag)

962

GLib.source_remove(self.disable_initiator_tag)

594

963

self.disable_initiator_tag = None

595

964

self.expires = None

596

965

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

597

gobject.source_remove(self.checker_initiator_tag)

966

GLib.source_remove(self.checker_initiator_tag)

598

967

self.checker_initiator_tag = None

599

968

self.stop_checker()

600

969

self.enabled = False

601

970

if not quiet:

602

971

self.send_changedstate()

603

# 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

604

973

return False

605

974

606

975

def __del__(self):

607

976

self.disable()

608

977

609

978

def init_checker(self):

610

979

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

611

980

# and every interval from then on.

612

981

if self.checker_initiator_tag is not None:

613

gobject.source_remove(self.checker_initiator_tag)

614

self.checker_initiator_tag = (gobject.timeout_add

615

(self.interval_milliseconds(),

616

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)

617

986

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

618

987

if self.disable_initiator_tag is not None:

619

gobject.source_remove(self.disable_initiator_tag)

620

self.disable_initiator_tag = (gobject.timeout_add

621

(self.timeout_milliseconds(),

622

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)

623

991

# Also start a new checker *right now*.

624

992

self.start_checker()

625

626

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

627

996

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

628

997

self.checker_callback_tag = None

629

998

self.checker = None

630

if os.WIFEXITED(condition):

631

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

632

1006

if self.last_checker_status == 0:

633

1007

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

634

1008

vars(self))

635

1009

self.checked_ok()

636

1010

else:

637

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

638

vars(self))

1011

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

639

1012

else:

640

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

641

1015

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

642

1016

vars(self))

643

1017

return False

1018

644

1019

def checked_ok(self):

645

1020

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

646

1021

self.last_checked_ok = datetime.datetime.utcnow()

647

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

648

1024

self.bump_timeout()

649

1025

650

1026

def bump_timeout(self, timeout=None):

651

1027

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

652

1028

if timeout is None:

653

1029

timeout = self.timeout

654

1030

if self.disable_initiator_tag is not None:

655

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

656

1032

self.disable_initiator_tag = None

657

1033

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

658

self.disable_initiator_tag = (gobject.timeout_add

659

(timedelta_to_milliseconds

660

(timeout), self.disable))

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

661

1036

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

662

1037

663

1038

def need_approval(self):

664

1039

self.last_approval_request = datetime.datetime.utcnow()

665

1040

666

1041

def start_checker(self):

667

1042

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

668

1043

669

1044

If a checker already exists, leave it running and do

670

1045

nothing."""

671

1046

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

676

1051

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

677

1052

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

678

1053

# should be.

679

680

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

681

try:

682

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

683

except (AttributeError, OSError) as error:

684

if (isinstance(error, OSError)

685

and error.errno != errno.ECHILD):

686

raise error

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

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

693

1059

# Start a new checker if needed

694

1060

if self.checker is None:

695

1061

# Escape attributes for the shell

696

escaped_attrs = dict(

697

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

698

for attr in

699

self.runtime_expansions)

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

700

1065

try:

701

1066

command = self.checker_command % escaped_attrs

702

1067

except TypeError as error:

703

1068

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

704

self.checker_command, exc_info=error)

705

return True # Try again later

1069

self.checker_command,

1070

exc_info=error)

1071

return True # Try again later

706

1072

self.current_checker_command = command

707

try:

708

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

709

command, self.name)

710

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

711

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

712

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

713

# always replaced by /dev/null.)

714

self.checker = subprocess.Popen(command,

715

close_fds=True,

716

shell=True, cwd="/")

717

except OSError as error:

718

logger.error("Failed to start subprocess",

719

exc_info=error)

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

728

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

729

except OSError as error:

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

739

# 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

740

1099

return True

741

1100

742

1101

def stop_checker(self):

743

1102

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

744

1103

if self.checker_callback_tag:

745

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

746

1105

self.checker_callback_tag = None

747

1106

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

748

1107

return

749

1108

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

750

try:

751

self.checker.terminate()

752

#time.sleep(0.5)

753

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

754

# self.checker.kill()

755

except OSError as error:

756

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

757

raise

1109

self.checker.terminate()

758

1110

self.checker = None

759

1111

760

1112

761

def dbus_service_property(dbus_interface, signature="v",

762

access="readwrite", byte_arrays=False):

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

763

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

764

1118

become properties on the D-Bus.

765

1119

766

1120

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

767

1121

and with one argument by "Set".

768

1122

769

1123

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

770

1124

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

771

1125

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

774

1128

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

775

1129

if byte_arrays and signature != "ay":

776

1130

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

777

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

1131

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

1132

778

1133

def decorator(func):

779

1134

func._dbus_is_property = True

780

1135

func._dbus_interface = dbus_interface

783

1138

func._dbus_name = func.__name__

784

1139

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

785

1140

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

786

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

787

1142

return func

1143

788

1144

return decorator

789

1145

790

1146

791

1147

def dbus_interface_annotations(dbus_interface):

792

1148

"""Decorator for marking functions returning interface annotations

793

1149

794

1150

Usage:

795

1151

796

1152

@dbus_interface_annotations("org.example.Interface")

797

1153

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

798

1154

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

799

1155

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

800

1156

"false"}

801

1157

"""

1158

802

1159

def decorator(func):

803

1160

func._dbus_is_interface = True

804

1161

func._dbus_interface = dbus_interface

805

1162

func._dbus_name = dbus_interface

806

1163

return func

1164

807

1165

return decorator

808

1166

809

1167

810

1168

def dbus_annotations(annotations):

811

1169

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

812

1170

Usage:

813

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

814

1175

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

815

1176

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

1177

def Property_dbus_property(self):

820

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

821

1181

"""

1182

822

1183

def decorator(func):

823

1184

func._dbus_annotations = annotations

824

1185

return func

1186

825

1187

return decorator

826

1188

827

1189

828

1190

class DBusPropertyException(dbus.exceptions.DBusException):

829

1191

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

830

1192

"""

831

def __unicode__(self):

832

return unicode(str(self))

1193

pass

833

1194

834

1195

835

1196

class DBusPropertyAccessException(DBusPropertyException):

844

1205

pass

845

1206

846

1207

847

class DBusObjectWithProperties(dbus.service.Object):

848

"""A D-Bus object with properties.

849

850

Classes inheriting from this can use the dbus_service_property

851

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

852

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.

853

1213

"""

854

1214

855

1215

@staticmethod

856

1216

def _is_dbus_thing(thing):

857

1217

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

858

1218

859

1219

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

860

1220

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

861

1221

"""

862

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

1222

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

863

1223

False)

864

1224

865

1225

def _get_all_dbus_things(self, thing):

866

1226

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

867

1227

"""

868

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

869

name),

1228

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

870

1229

athing.__get__(self))

871

1230

for cls in self.__class__.__mro__

872

1231

for name, athing in

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

875

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

876

1305

def _get_dbus_property(self, interface_name, property_name):

877

1306

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

878

1307

property with the specified name and interface.

879

1308

"""

880

for cls in self.__class__.__mro__:

881

for name, value in (inspect.getmembers

882

(cls,

883

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")):

884

1312

if (value._dbus_name == property_name

885

1313

and value._dbus_interface == interface_name):

886

1314

return value.__get__(self)

887

1315

888

1316

# No such property

889

raise DBusPropertyNotFound(self.dbus_object_path + ":"

890

+ interface_name + "."

891

+ property_name)

892

893

@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",

894

1331

out_signature="v")

895

1332

def Get(self, interface_name, property_name):

896

1333

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

902

1339

if not hasattr(value, "variant_level"):

903

1340

return value

904

1341

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

905

1342

906

1343

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

907

1344

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

908

1345

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

914

1351

# The byte_arrays option is not supported yet on

915

1352

# signatures other than "ay".

916

1353

if prop._dbus_signature != "ay":

917

raise ValueError

1354

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

1355

"'ay' signature {!r}"

1356

.format(prop._dbus_signature))

918

1357

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

919

1358

for byte in value))

920

1359

prop(value)

921

922

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

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

923

1363

out_signature="a{sv}")

924

1364

def GetAll(self, interface_name):

925

1365

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

926

1366

standard.

927

1367

928

1368

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

929

1369

"""

930

1370

properties = {}

940

1380

if not hasattr(value, "variant_level"):

941

1381

properties[name] = value

942

1382

continue

943

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

944

value.variant_level+1)

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

945

1385

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

946

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

947

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

948

1396

out_signature="s",

949

1397

path_keyword='object_path',

950

1398

connection_keyword='connection')

951

1399

def Introspect(self, object_path, connection):

952

1400

"""Overloading of standard D-Bus method.

953

1401

954

1402

Inserts property tags and interface annotation tags.

955

1403

"""

956

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

957

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

958

1407

try:

959

1408

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

1409

960

1410

def make_tag(document, name, prop):

961

1411

e = document.createElement("property")

962

1412

e.setAttribute("name", name)

963

1413

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

964

1414

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

965

1415

return e

1416

966

1417

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

967

1418

# Add property tags

968

1419

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

971

1422

if prop._dbus_interface

972

1423

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

973

1424

if_tag.appendChild(tag)

974

# Add annotation tags

975

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

976

for tag in if_tag.getElementsByTagName(typ):

977

annots = dict()

978

for name, prop in (self.

979

_get_all_dbus_things(typ)):

980

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

981

and prop._dbus_interface

982

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.iteritems():

988

ann_tag = document.createElement(

989

"annotation")

990

ann_tag.setAttribute("name", name)

991

ann_tag.setAttribute("value", value)

992

tag.appendChild(ann_tag)

993

# Add interface annotation tags

994

for annotation, value in dict(

995

itertools.chain.from_iterable(

996

annotations().iteritems()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

999

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

1000

)).iteritems():

1001

ann_tag = document.createElement("annotation")

1002

ann_tag.setAttribute("name", annotation)

1003

ann_tag.setAttribute("value", value)

1004

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)

1005

1441

# Add the names to the return values for the

1006

1442

# "org.freedesktop.DBus.Properties" methods

1007

1443

if (if_tag.getAttribute("name")

1026

1462

return xmlstring

1027

1463

1028

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

1029

1536

def datetime_to_dbus(dt, variant_level=0):

1030

1537

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

1031

1538

if dt is None:

1032

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

1033

return dbus.String(dt.isoformat(),

1034

variant_level=variant_level)

1539

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

1540

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

1035

1541

1036

1542

1037

1543

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1039

1545

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

1040

1546

interface names according to the "alt_interface_names" mapping.

1041

1547

Usage:

1042

1548

1043

1549

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

1044

1550

"net.example.AlternateInterface"})

1045

1551

class SampleDBusObject(dbus.service.Object):

1046

1552

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

1047

1553

def SampleDBusMethod():

1048

1554

pass

1049

1555

1050

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1051

1557

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

1052

1558

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

1053

1559

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

1054

1560

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

1055

1561

1056

1562

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

1057

1563

(from DBusObjectWithProperties) and interfaces (from the

1058

1564

dbus_interface_annotations decorator).

1059

1565

"""

1566

1060

1567

def wrapper(cls):

1061

1568

for orig_interface_name, alt_interface_name in (

1062

alt_interface_names.iteritems()):

1569

alt_interface_names.items()):

1063

1570

attr = {}

1064

1571

interface_names = set()

1065

1572

# Go though all attributes of the class

1067

1574

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

1068

1575

# with the wrong interface name

1069

1576

if (not hasattr(attribute, "_dbus_interface")

1070

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

1577

or not attribute._dbus_interface.startswith(

1578

orig_interface_name)):

1072

1579

continue

1073

1580

# Create an alternate D-Bus interface name based on

1074

1581

# the current name

1075

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1582

alt_interface = attribute._dbus_interface.replace(

1583

orig_interface_name, alt_interface_name)

1078

1584

interface_names.add(alt_interface)

1079

1585

# Is this a D-Bus signal?

1080

1586

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

1081

1587

# Extract the original non-method undecorated

1082

1588

# function by black magic

1083

nonmethod_func = (dict(

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

1084

1591

zip(attribute.func_code.co_freevars,

1085

attribute.__closure__))["func"]

1086

.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)

1087

1599

# Create a new, but exactly alike, function

1088

1600

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

1089

1601

# with the alternate D-Bus interface name

1090

new_function = (dbus.service.signal

1091

(alt_interface,

1092

attribute._dbus_signature)

1093

(types.FunctionType(

1094

nonmethod_func.func_code,

1095

nonmethod_func.func_globals,

1096

nonmethod_func.func_name,

1097

nonmethod_func.func_defaults,

1098

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))

1099

1606

# Copy annotations, if any

1100

1607

try:

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1608

new_function._dbus_annotations = dict(

1609

attribute._dbus_annotations)

1103

1610

except AttributeError:

1104

1611

pass

1612

1105

1613

# Define a creator of a function to call both the

1106

1614

# original and alternate functions, so both the

1107

1615

# original and alternate signals gets sent when

1110

1618

"""This function is a scope container to pass

1111

1619

func1 and func2 to the "call_both" function

1112

1620

outside of its arguments"""

1621

1622

@functools.wraps(func2)

1113

1623

def call_both(*args, **kwargs):

1114

1624

"""This function will emit two D-Bus

1115

1625

signals by calling func1 and func2"""

1116

1626

func1(*args, **kwargs)

1117

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

1118

1634

return call_both

1119

1635

# Create the "call_both" function and add it to

1120

1636

# the class

1125

1641

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

1126

1642

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

1127

1643

# to the class.

1128

attr[attrname] = (dbus.service.method

1129

(alt_interface,

1130

attribute._dbus_in_signature,

1131

attribute._dbus_out_signature)

1132

(types.FunctionType

1133

(attribute.func_code,

1134

attribute.func_globals,

1135

attribute.func_name,

1136

attribute.func_defaults,

1137

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)))

1138

1650

# Copy annotations, if any

1139

1651

try:

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1652

attr[attrname]._dbus_annotations = dict(

1653

attribute._dbus_annotations)

1142

1654

except AttributeError:

1143

1655

pass

1144

1656

# Is this a D-Bus property?

1147

1659

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

1148

1660

# property with the alternate D-Bus interface

1149

1661

# name. Add it to the class.

1150

attr[attrname] = (dbus_service_property

1151

(alt_interface,

1152

attribute._dbus_signature,

1153

attribute._dbus_access,

1154

attribute

1155

._dbus_get_args_options

1156

["byte_arrays"])

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

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)))

1163

1668

# Copy annotations, if any

1164

1669

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1670

attr[attrname]._dbus_annotations = dict(

1671

attribute._dbus_annotations)

1167

1672

except AttributeError:

1168

1673

pass

1169

1674

# Is this a D-Bus interface?

1172

1677

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

1173

1678

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

1174

1679

# to the class.

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1680

attr[attrname] = (

1681

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1183

1683

if deprecate:

1184

1684

# Deprecate all alternate interfaces

1185

iname="_AlternateDBusNames_interface_annotation{0}"

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1186

1686

for interface_name in interface_names:

1687

1187

1688

@dbus_interface_annotations(interface_name)

1188

1689

def func(self):

1189

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

1190

"true" }

1690

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

1691

"true"}

1191

1692

# Find an unused name

1192

1693

for aname in (iname.format(i)

1193

1694

for i in itertools.count()):

1197

1698

if interface_names:

1198

1699

# Replace the class with a new subclass of it with

1199

1700

# methods, signals, etc. as created above.

1200

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

1201

(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)

1202

1707

return cls

1708

1203

1709

return wrapper

1204

1710

1205

1711

1206

1712

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

1207

"se.bsnet.fukt.Mandos"})

1713

"se.bsnet.fukt.Mandos"})

1208

1714

class ClientDBus(Client, DBusObjectWithProperties):

1209

1715

"""A Client class using D-Bus

1210

1716

1211

1717

Attributes:

1212

1718

dbus_object_path: dbus.ObjectPath

1213

1719

bus: dbus.SystemBus()

1214

1720

"""

1215

1721

1216

1722

runtime_expansions = (Client.runtime_expansions

1217

+ ("dbus_object_path",))

1218

1723

+ ("dbus_object_path", ))

1724

1725

_interface = "se.recompile.Mandos.Client"

1726

1219

1727

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

1220

1221

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

1728

1729

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

1222

1730

self.bus = bus

1223

1731

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

1224

1732

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

1225

1733

# the D-Bus

1226

client_object_name = unicode(self.name).translate(

1734

client_object_name = str(self.name).translate(

1227

1735

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

1228

1736

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

1229

self.dbus_object_path = (dbus.ObjectPath

1230

("/clients/" + client_object_name))

1737

self.dbus_object_path = dbus.ObjectPath(

1738

"/clients/" + client_object_name)

1231

1739

DBusObjectWithProperties.__init__(self, self.bus,

1232

1740

self.dbus_object_path)

1233

1234

def notifychangeproperty(transform_func,

1235

dbus_name, type_func=lambda x: x,

1236

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):

1237

1747

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

1238

1748

its changes to DBus.

1239

1749

1240

1750

transform_fun: Function that takes a value and a variant_level

1241

1751

and transforms it to a D-Bus type.

1242

1752

dbus_name: D-Bus name of the variable

1244

1754

to the D-Bus. Default: no transform

1245

1755

variant_level: D-Bus variant level. Default: 1

1246

1756

"""

1247

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

1757

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

1758

1248

1759

def setter(self, value):

1249

1760

if hasattr(self, "dbus_object_path"):

1250

1761

if (not hasattr(self, attrname) or

1251

1762

type_func(getattr(self, attrname, None))

1252

1763

!= type_func(value)):

1253

dbus_value = transform_func(type_func(value),

1254

variant_level

1255

=variant_level)

1256

self.PropertyChanged(dbus.String(dbus_name),

1257

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())

1258

1779

setattr(self, attrname, value)

1259

1780

1260

1781

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

1261

1782

1262

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1263

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1264

1785

"ApprovalPending",

1265

type_func = bool)

1786

type_func=bool)

1266

1787

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

1267

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1268

1789

"LastEnabled")

1269

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

1270

type_func = lambda checker:

1271

checker is not None)

1790

checker = notifychangeproperty(

1791

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1272

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1273

1794

"LastCheckedOK")

1274

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1277

1798

datetime_to_dbus, "LastApprovalRequest")

1278

1799

approved_by_default = notifychangeproperty(dbus.Boolean,

1279

1800

"ApprovedByDefault")

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1281

"ApprovalDelay",

1282

type_func =

1283

timedelta_to_milliseconds)

1801

approval_delay = notifychangeproperty(

1802

dbus.UInt64, "ApprovalDelay",

1803

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

1284

1804

approval_duration = notifychangeproperty(

1285

1805

dbus.UInt64, "ApprovalDuration",

1286

type_func = timedelta_to_milliseconds)

1806

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

1287

1807

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

1288

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

1289

type_func =

1290

timedelta_to_milliseconds)

1808

timeout = notifychangeproperty(

1809

dbus.UInt64, "Timeout",

1810

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

1291

1811

extended_timeout = notifychangeproperty(

1292

1812

dbus.UInt64, "ExtendedTimeout",

1293

type_func = timedelta_to_milliseconds)

1294

interval = notifychangeproperty(dbus.UInt64,

1295

"Interval",

1296

type_func =

1297

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)

1298

1817

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

1299

1818

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

1819

invalidate_only=True)

1820

1300

1821

del notifychangeproperty

1301

1822

1302

1823

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

1303

1824

try:

1304

1825

self.remove_from_connection()

1307

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1308

1829

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

1309

1830

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

1310

1311

def checker_callback(self, pid, condition, command,

1312

*args, **kwargs):

1313

self.checker_callback_tag = None

1314

self.checker = None

1315

if os.WIFEXITED(condition):

1316

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:

1317

1839

# Emit D-Bus signal

1318

1840

self.CheckerCompleted(dbus.Int16(exitstatus),

1319

dbus.Int64(condition),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1320

1843

dbus.String(command))

1321

1844

else:

1322

1845

# Emit D-Bus signal

1323

1846

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

1324

dbus.Int64(condition),

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1325

1851

dbus.String(command))

1326

1327

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

1328

*args, **kwargs)

1329

1852

return ret

1853

1330

1854

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

1331

old_checker = self.checker

1332

if self.checker is not None:

1333

old_checker_pid = self.checker.pid

1334

else:

1335

old_checker_pid = None

1855

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

1336

1856

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

1337

1857

# Only if new checker process was started

1338

1858

if (self.checker is not None

1340

1860

# Emit D-Bus signal

1341

1861

self.CheckerStarted(self.current_checker_command)

1342

1862

return r

1343

1863

1344

1864

def _reset_approved(self):

1345

1865

self.approved = None

1346

1866

return False

1347

1867

1348

1868

def approve(self, value=True):

1349

1869

self.approved = value

1350

gobject.timeout_add(timedelta_to_milliseconds

1351

(self.approval_duration),

1352

self._reset_approved)

1870

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

1871

* 1000), self._reset_approved)

1353

1872

self.send_changedstate()

1354

1355

## D-Bus methods, signals & properties

1356

_interface = "se.recompile.Mandos.Client"

1357

1358

## Interfaces

1359

1360

@dbus_interface_annotations(_interface)

1361

def _foo(self):

1362

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

1363

"false"}

1364

1365

## Signals

1366

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1367

1880

# CheckerCompleted - signal

1368

1881

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

1369

1882

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

1370

1883

"D-Bus signal"

1371

1884

pass

1372

1885

1373

1886

# CheckerStarted - signal

1374

1887

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

1375

1888

def CheckerStarted(self, command):

1376

1889

"D-Bus signal"

1377

1890

pass

1378

1891

1379

1892

# PropertyChanged - signal

1893

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

1380

1894

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

1381

1895

def PropertyChanged(self, property, value):

1382

1896

"D-Bus signal"

1383

1897

pass

1384

1898

1385

1899

# GotSecret - signal

1386

1900

@dbus.service.signal(_interface)

1387

1901

def GotSecret(self):

1390

1904

server to mandos-client

1391

1905

"""

1392

1906

pass

1393

1907

1394

1908

# Rejected - signal

1395

1909

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

1396

1910

def Rejected(self, reason):

1397

1911

"D-Bus signal"

1398

1912

pass

1399

1913

1400

1914

# NeedApproval - signal

1401

1915

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

1402

1916

def NeedApproval(self, timeout, default):

1403

1917

"D-Bus signal"

1404

1918

return self.need_approval()

1405

1406

## Methods

1407

1919

1920

# Methods

1921

1408

1922

# Approve - method

1409

1923

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

1410

1924

def Approve(self, value):

1411

1925

self.approve(value)

1412

1926

1413

1927

# CheckedOK - method

1414

1928

@dbus.service.method(_interface)

1415

1929

def CheckedOK(self):

1416

1930

self.checked_ok()

1417

1931

1418

1932

# Enable - method

1933

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

1419

1934

@dbus.service.method(_interface)

1420

1935

def Enable(self):

1421

1936

"D-Bus method"

1422

1937

self.enable()

1423

1938

1424

1939

# StartChecker - method

1940

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

1425

1941

@dbus.service.method(_interface)

1426

1942

def StartChecker(self):

1427

1943

"D-Bus method"

1428

1944

self.start_checker()

1429

1945

1430

1946

# Disable - method

1947

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

1431

1948

@dbus.service.method(_interface)

1432

1949

def Disable(self):

1433

1950

"D-Bus method"

1434

1951

self.disable()

1435

1952

1436

1953

# StopChecker - method

1954

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

1437

1955

@dbus.service.method(_interface)

1438

1956

def StopChecker(self):

1439

1957

self.stop_checker()

1440

1441

## Properties

1442

1958

1959

# Properties

1960

1443

1961

# ApprovalPending - property

1444

1962

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

1445

1963

def ApprovalPending_dbus_property(self):

1446

1964

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

1447

1965

1448

1966

# ApprovedByDefault - property

1449

@dbus_service_property(_interface, signature="b",

1967

@dbus_service_property(_interface,

1968

signature="b",

1450

1969

access="readwrite")

1451

1970

def ApprovedByDefault_dbus_property(self, value=None):

1452

1971

if value is None: # get

1453

1972

return dbus.Boolean(self.approved_by_default)

1454

1973

self.approved_by_default = bool(value)

1455

1974

1456

1975

# ApprovalDelay - property

1457

@dbus_service_property(_interface, signature="t",

1976

@dbus_service_property(_interface,

1977

signature="t",

1458

1978

access="readwrite")

1459

1979

def ApprovalDelay_dbus_property(self, value=None):

1460

1980

if value is None: # get

1461

return dbus.UInt64(self.approval_delay_milliseconds())

1981

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

1982

* 1000)

1462

1983

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

1463

1984

1464

1985

# ApprovalDuration - property

1465

@dbus_service_property(_interface, signature="t",

1986

@dbus_service_property(_interface,

1987

signature="t",

1466

1988

access="readwrite")

1467

1989

def ApprovalDuration_dbus_property(self, value=None):

1468

1990

if value is None: # get

1469

return dbus.UInt64(timedelta_to_milliseconds(

1470

self.approval_duration))

1991

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

1992

* 1000)

1471

1993

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

1472

1994

1473

1995

# Name - property

1996

@dbus_annotations(

1997

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

1474

1998

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

1475

1999

def Name_dbus_property(self):

1476

2000

return dbus.String(self.name)

1477

2001

1478

2002

# Fingerprint - property

2003

@dbus_annotations(

2004

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

1479

2005

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

1480

2006

def Fingerprint_dbus_property(self):

1481

2007

return dbus.String(self.fingerprint)

1482

2008

1483

2009

# Host - property

1484

@dbus_service_property(_interface, signature="s",

2010

@dbus_service_property(_interface,

2011

signature="s",

1485

2012

access="readwrite")

1486

2013

def Host_dbus_property(self, value=None):

1487

2014

if value is None: # get

1488

2015

return dbus.String(self.host)

1489

self.host = unicode(value)

1490

2016

self.host = str(value)

2017

1491

2018

# Created - property

2019

@dbus_annotations(

2020

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

1492

2021

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

1493

2022

def Created_dbus_property(self):

1494

2023

return datetime_to_dbus(self.created)

1495

2024

1496

2025

# LastEnabled - property

1497

2026

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

1498

2027

def LastEnabled_dbus_property(self):

1499

2028

return datetime_to_dbus(self.last_enabled)

1500

2029

1501

2030

# Enabled - property

1502

@dbus_service_property(_interface, signature="b",

2031

@dbus_service_property(_interface,

2032

signature="b",

1503

2033

access="readwrite")

1504

2034

def Enabled_dbus_property(self, value=None):

1505

2035

if value is None: # get

1508

2038

self.enable()

1509

2039

else:

1510

2040

self.disable()

1511

2041

1512

2042

# LastCheckedOK - property

1513

@dbus_service_property(_interface, signature="s",

2043

@dbus_service_property(_interface,

2044

signature="s",

1514

2045

access="readwrite")

1515

2046

def LastCheckedOK_dbus_property(self, value=None):

1516

2047

if value is not None:

1517

2048

self.checked_ok()

1518

2049

return

1519

2050

return datetime_to_dbus(self.last_checked_ok)

1520

2051

1521

2052

# LastCheckerStatus - property

1522

@dbus_service_property(_interface, signature="n",

1523

access="read")

2053

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

1524

2054

def LastCheckerStatus_dbus_property(self):

1525

2055

return dbus.Int16(self.last_checker_status)

1526

2056

1527

2057

# Expires - property

1528

2058

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

1529

2059

def Expires_dbus_property(self):

1530

2060

return datetime_to_dbus(self.expires)

1531

2061

1532

2062

# LastApprovalRequest - property

1533

2063

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

1534

2064

def LastApprovalRequest_dbus_property(self):

1535

2065

return datetime_to_dbus(self.last_approval_request)

1536

2066

1537

2067

# Timeout - property

1538

@dbus_service_property(_interface, signature="t",

2068

@dbus_service_property(_interface,

2069

signature="t",

1539

2070

access="readwrite")

1540

2071

def Timeout_dbus_property(self, value=None):

1541

2072

if value is None: # get

1542

return dbus.UInt64(self.timeout_milliseconds())

2073

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

1543

2074

old_timeout = self.timeout

1544

2075

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

1545

2076

# Reschedule disabling

1553

2084

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

1554

2085

is None):

1555

2086

return

1556

gobject.source_remove(self.disable_initiator_tag)

1557

self.disable_initiator_tag = (

1558

gobject.timeout_add(

1559

timedelta_to_milliseconds(self.expires - now),

1560

self.disable))

1561

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

1562

2092

# ExtendedTimeout - property

1563

@dbus_service_property(_interface, signature="t",

2093

@dbus_service_property(_interface,

2094

signature="t",

1564

2095

access="readwrite")

1565

2096

def ExtendedTimeout_dbus_property(self, value=None):

1566

2097

if value is None: # get

1567

return dbus.UInt64(self.extended_timeout_milliseconds())

2098

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

2099

* 1000)

1568

2100

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

1569

2101

1570

2102

# Interval - property

1571

@dbus_service_property(_interface, signature="t",

2103

@dbus_service_property(_interface,

2104

signature="t",

1572

2105

access="readwrite")

1573

2106

def Interval_dbus_property(self, value=None):

1574

2107

if value is None: # get

1575

return dbus.UInt64(self.interval_milliseconds())

2108

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

1576

2109

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

1577

2110

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

1578

2111

return

1579

2112

if self.enabled:

1580

2113

# Reschedule checker run

1581

gobject.source_remove(self.checker_initiator_tag)

1582

self.checker_initiator_tag = (gobject.timeout_add

1583

(value, self.start_checker))

1584

self.start_checker() # Start one now, too

1585

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

1586

2119

# Checker - property

1587

@dbus_service_property(_interface, signature="s",

2120

@dbus_service_property(_interface,

2121

signature="s",

1588

2122

access="readwrite")

1589

2123

def Checker_dbus_property(self, value=None):

1590

2124

if value is None: # get

1591

2125

return dbus.String(self.checker_command)

1592

self.checker_command = unicode(value)

1593

2126

self.checker_command = str(value)

2127

1594

2128

# CheckerRunning - property

1595

@dbus_service_property(_interface, signature="b",

2129

@dbus_service_property(_interface,

2130

signature="b",

1596

2131

access="readwrite")

1597

2132

def CheckerRunning_dbus_property(self, value=None):

1598

2133

if value is None: # get

1601

2136

self.start_checker()

1602

2137

else:

1603

2138

self.stop_checker()

1604

2139

1605

2140

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

1606

2144

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

1607

2145

def ObjectPath_dbus_property(self):

1608

return self.dbus_object_path # is already a dbus.ObjectPath

1609

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1610

2148

# Secret = property

1611

@dbus_service_property(_interface, signature="ay",

1612

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)

1613

2156

def Secret_dbus_property(self, value):

1614

self.secret = str(value)

1615

2157

self.secret = bytes(value)

2158

1616

2159

del _interface

1617

2160

1618

2161

1621

2164

self._pipe = child_pipe

1622

2165

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

1623

2166

if not self._pipe.recv():

1624

raise KeyError()

1625

2167

raise KeyError(fpr)

2168

1626

2169

def __getattribute__(self, name):

1627

2170

if name == '_pipe':

1628

2171

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

1631

2174

if data[0] == 'data':

1632

2175

return data[1]

1633

2176

if data[0] == 'function':

2177

1634

2178

def func(*args, **kwargs):

1635

2179

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

1636

2180

return self._pipe.recv()[1]

2181

1637

2182

return func

1638

2183

1639

2184

def __setattr__(self, name, value):

1640

2185

if name == '_pipe':

1641

2186

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

1644

2189

1645

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1646

2191

"""A class to handle client connections.

1647

2192

1648

2193

Instantiated once for each connection to handle it.

1649

2194

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

1650

2195

1651

2196

def handle(self):

1652

2197

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

1653

2198

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

1654

unicode(self.client_address))

2199

str(self.client_address))

1655

2200

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

1656

2201

self.server.child_pipe.fileno())

1657

1658

session = (gnutls.connection

1659

.ClientSession(self.request,

1660

gnutls.connection

1661

.X509Credentials()))

1662

1663

# Note: gnutls.connection.X509Credentials is really a

1664

# generic GnuTLS certificate credentials object so long as

1665

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

1666

# here despite using OpenPGP certificates.

1667

1668

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

1669

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

1670

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

1671

# "+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"))

1672

2209

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

1673

2210

priority = self.server.gnutls_priority

1674

2211

if priority is None:

1675

2212

priority = "NORMAL"

1676

(gnutls.library.functions

1677

.gnutls_priority_set_direct(session._c_object,

1678

priority, None))

1679

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1680

2217

# Start communication using the Mandos protocol

1681

2218

# Get protocol number

1682

2219

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

1683

2220

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

1684

2221

try:

1685

2222

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

1686

raise RuntimeError

2223

raise RuntimeError(line)

1687

2224

except (ValueError, IndexError, RuntimeError) as error:

1688

2225

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

1689

2226

return

1690

2227

1691

2228

# Start GnuTLS connection

1692

2229

try:

1693

2230

session.handshake()

1694

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1695

2232

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

1696

2233

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

1697

2234

# established. Just abandon the request.

1698

2235

return

1699

2236

logger.debug("Handshake succeeded")

1700

2237

1701

2238

approval_required = False

1702

2239

try:

1703

2240

try:

1704

fpr = self.fingerprint(self.peer_certificate

1705

(session))

1706

except (TypeError,

1707

gnutls.errors.GNUTLSError) as error:

2241

fpr = self.fingerprint(

2242

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1708

2244

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

1709

2245

return

1710

2246

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

1711

2247

1712

2248

try:

1713

2249

client = ProxyClient(child_pipe, fpr,

1714

2250

self.client_address)

1715

2251

except KeyError:

1716

2252

return

1717

2253

1718

2254

if client.approval_delay:

1719

2255

delay = client.approval_delay

1720

2256

client.approvals_pending += 1

1721

2257

approval_required = True

1722

2258

1723

2259

while True:

1724

2260

if not client.enabled:

1725

2261

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

1726

client.name)

2262

client.name)

1727

2263

if self.server.use_dbus:

1728

2264

# Emit D-Bus signal

1729

2265

client.Rejected("Disabled")

1730

2266

return

1731

2267

1732

2268

if client.approved or not client.approval_delay:

1733

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1734

2270

break

1735

2271

elif client.approved is None:

1736

2272

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

1738

2274

if self.server.use_dbus:

1739

2275

# Emit D-Bus signal

1740

2276

client.NeedApproval(

1741

client.approval_delay_milliseconds(),

1742

client.approved_by_default)

2277

client.approval_delay.total_seconds()

2278

* 1000, client.approved_by_default)

1743

2279

else:

1744

2280

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

1745

2281

client.name)

1747

2283

# Emit D-Bus signal

1748

2284

client.Rejected("Denied")

1749

2285

return

1750

1751

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1752

2288

time = datetime.datetime.now()

1753

2289

client.changedstate.acquire()

1754

client.changedstate.wait(

1755

float(timedelta_to_milliseconds(delay)

1756

/ 1000))

2290

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

1757

2291

client.changedstate.release()

1758

2292

time2 = datetime.datetime.now()

1759

2293

if (time2 - time) >= delay:

1769

2303

break

1770

2304

else:

1771

2305

delay -= time2 - time

1772

1773

sent_size = 0

1774

while sent_size < len(client.secret):

1775

try:

1776

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

1777

except gnutls.errors.GNUTLSError as error:

1778

logger.warning("gnutls send failed",

1779

exc_info=error)

1780

return

1781

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

1782

sent, len(client.secret)

1783

- (sent_size + sent))

1784

sent_size += sent

1785

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

1786

2314

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

1787

2315

# bump the timeout using extended_timeout

1788

2316

client.bump_timeout(client.extended_timeout)

1789

2317

if self.server.use_dbus:

1790

2318

# Emit D-Bus signal

1791

2319

client.GotSecret()

1792

2320

1793

2321

finally:

1794

2322

if approval_required:

1795

2323

client.approvals_pending -= 1

1796

2324

try:

1797

2325

session.bye()

1798

except gnutls.errors.GNUTLSError as error:

2326

except gnutls.Error as error:

1799

2327

logger.warning("GnuTLS bye failed",

1800

2328

exc_info=error)

1801

2329

1802

2330

@staticmethod

1803

2331

def peer_certificate(session):

1804

2332

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

1805

2333

# If not an OpenPGP certificate...

1806

if (gnutls.library.functions

1807

.gnutls_certificate_type_get(session._c_object)

1808

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1809

# ...do the normal thing

1810

return session.peer_certificate

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1811

2338

list_size = ctypes.c_uint(1)

1812

cert_list = (gnutls.library.functions

1813

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

1814

2340

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

1815

2341

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

1816

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

1817

" certificate")

2342

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

1818

2343

if list_size.value == 0:

1819

2344

return None

1820

2345

cert = cert_list[0]

1821

2346

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

1822

2347

1823

2348

@staticmethod

1824

2349

def fingerprint(openpgp):

1825

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1826

2351

# New GnuTLS "datum" with the OpenPGP public key

1827

datum = (gnutls.library.types

1828

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

1829

ctypes.POINTER

1830

(ctypes.c_ubyte)),

1831

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)))

1832

2356

# New empty GnuTLS certificate

1833

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1834

(gnutls.library.functions

1835

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1836

2359

# Import the OpenPGP public key into the certificate

1837

(gnutls.library.functions

1838

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

1839

gnutls.library.constants

1840

.GNUTLS_OPENPGP_FMT_RAW))

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1841

2362

# Verify the self signature in the key

1842

2363

crtverify = ctypes.c_uint()

1843

(gnutls.library.functions

1844

.gnutls_openpgp_crt_verify_self(crt, 0,

1845

ctypes.byref(crtverify)))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1846

2366

if crtverify.value != 0:

1847

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1848

raise (gnutls.errors.CertificateSecurityError

1849

("Verify failed"))

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError("Verify failed")

1850

2369

# New buffer for the fingerprint

1851

2370

buf = ctypes.create_string_buffer(20)

1852

2371

buf_len = ctypes.c_size_t()

1853

2372

# Get the fingerprint from the certificate into the buffer

1854

(gnutls.library.functions

1855

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

1856

ctypes.byref(buf_len)))

2373

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

2374

ctypes.byref(buf_len))

1857

2375

# Deinit the certificate

1858

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2376

gnutls.openpgp_crt_deinit(crt)

1859

2377

# Convert the buffer to a Python bytestring

1860

2378

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

1861

2379

# Convert the bytestring to hexadecimal notation

1865

2383

1866

2384

class MultiprocessingMixIn(object):

1867

2385

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

2386

1868

2387

def sub_process_main(self, request, address):

1869

2388

try:

1870

2389

self.finish_request(request, address)

1871

2390

except Exception:

1872

2391

self.handle_error(request, address)

1873

2392

self.close_request(request)

1874

2393

1875

2394

def process_request(self, request, address):

1876

2395

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

1877

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

1878

args = (request, address))

2396

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

2397

args=(request, address))

1879

2398

proc.start()

1880

2399

return proc

1881

2400

1882

2401

1883

2402

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1884

2403

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

2404

1885

2405

def process_request(self, request, client_address):

1886

2406

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

1887

2407

1888

2408

This function creates a new pipe in self.pipe

1889

2409

"""

1890

2410

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1891

2411

1892

2412

proc = MultiprocessingMixIn.process_request(self, request,

1893

2413

client_address)

1894

2414

self.child_pipe.close()

1895

2415

self.add_pipe(parent_pipe, proc)

1896

2416

1897

2417

def add_pipe(self, parent_pipe, proc):

1898

2418

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

1899

raise NotImplementedError

2419

raise NotImplementedError()

1900

2420

1901

2421

1902

2422

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1903

2423

socketserver.TCPServer, object):

1904

2424

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

1905

2425

1906

2426

Attributes:

1907

2427

enabled: Boolean; whether this server is activated yet

1908

2428

interface: None or a network interface name (string)

1909

2429

use_ipv6: Boolean; to use IPv6 or not

1910

2430

"""

2431

1911

2432

def __init__(self, server_address, RequestHandlerClass,

1912

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

2433

interface=None,

2434

use_ipv6=True,

2435

socketfd=None):

1913

2436

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

1914

2437

creating a new one with socket.socket().

1915

2438

"""

1921

2444

self.socketfd = socketfd

1922

2445

# Save the original socket.socket() function

1923

2446

self.socket_socket = socket.socket

2447

1924

2448

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

1925

#

2449

#

1926

2450

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

1927

2451

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

1928

2452

# patching socket.socket.)

1929

#

2453

#

1930

2454

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

1931

2455

@functools.wraps(socket.socket)

1932

2456

def socket_wrapper(*args, **kwargs):

1944

2468

# socket_wrapper(), if socketfd was set.

1945

2469

socketserver.TCPServer.__init__(self, server_address,

1946

2470

RequestHandlerClass)

1947

2471

1948

2472

def server_bind(self):

1949

2473

"""This overrides the normal server_bind() function

1950

2474

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

1951

2475

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

2476

global SO_BINDTODEVICE

1952

2477

if self.interface is not None:

1953

2478

if SO_BINDTODEVICE is None:

1954

logger.error("SO_BINDTODEVICE does not exist;"

1955

" cannot bind to interface %s",

1956

self.interface)

1957

else:

1958

try:

1959

self.socket.setsockopt(socket.SOL_SOCKET,

1960

SO_BINDTODEVICE,

1961

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

1962

except socket.error as error:

1963

if error.errno == errno.EPERM:

1964

logger.error("No permission to bind to"

1965

" interface %s", self.interface)

1966

elif error.errno == errno.ENOPROTOOPT:

1967

logger.error("SO_BINDTODEVICE not available;"

1968

" cannot bind to interface %s",

1969

self.interface)

1970

elif error.errno == errno.ENODEV:

1971

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

1972

" cannot bind", self.interface)

1973

else:

1974

raise

2479

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

2480

# common enough.

2481

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

2482

SO_BINDTODEVICE = 25

2483

try:

2484

self.socket.setsockopt(

2485

socket.SOL_SOCKET, SO_BINDTODEVICE,

2486

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

2487

except socket.error as error:

2488

if error.errno == errno.EPERM:

2489

logger.error("No permission to bind to"

2490

" interface %s", self.interface)

2491

elif error.errno == errno.ENOPROTOOPT:

2492

logger.error("SO_BINDTODEVICE not available;"

2493

" cannot bind to interface %s",

2494

self.interface)

2495

elif error.errno == errno.ENODEV:

2496

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

2497

" cannot bind", self.interface)

2498

else:

2499

raise

1975

2500

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

1976

2501

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

1977

2502

if not self.server_address[0]:

1978

2503

if self.address_family == socket.AF_INET6:

1979

any_address = "::" # in6addr_any

2504

any_address = "::" # in6addr_any

1980

2505

else:

1981

any_address = socket.INADDR_ANY

2506

any_address = "0.0.0.0" # INADDR_ANY

1982

2507

self.server_address = (any_address,

1983

2508

self.server_address[1])

1984

2509

elif not self.server_address[1]:

1985

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

1986

0)

2510

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

1987

2511

# if self.interface:

1988

2512

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

1989

2513

# 0, # port

1995

2519

1996

2520

class MandosServer(IPv6_TCPServer):

1997

2521

"""Mandos server.

1998

2522

1999

2523

Attributes:

2000

2524

clients: set of Client objects

2001

2525

gnutls_priority GnuTLS priority string

2002

2526

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

2003

2004

Assumes a gobject.MainLoop event loop.

2527

2528

Assumes a GLib.MainLoop event loop.

2005

2529

"""

2530

2006

2531

def __init__(self, server_address, RequestHandlerClass,

2007

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

2008

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

2532

interface=None,

2533

use_ipv6=True,

2534

clients=None,

2535

gnutls_priority=None,

2536

use_dbus=True,

2537

socketfd=None):

2009

2538

self.enabled = False

2010

2539

self.clients = clients

2011

2540

if self.clients is None:

2014

2543

self.gnutls_priority = gnutls_priority

2015

2544

IPv6_TCPServer.__init__(self, server_address,

2016

2545

RequestHandlerClass,

2017

interface = interface,

2018

use_ipv6 = use_ipv6,

2019

socketfd = socketfd)

2546

interface=interface,

2547

use_ipv6=use_ipv6,

2548

socketfd=socketfd)

2549

2020

2550

def server_activate(self):

2021

2551

if self.enabled:

2022

2552

return socketserver.TCPServer.server_activate(self)

2023

2553

2024

2554

def enable(self):

2025

2555

self.enabled = True

2026

2556

2027

2557

def add_pipe(self, parent_pipe, proc):

2028

2558

# Call "handle_ipc" for both data and EOF events

2029

gobject.io_add_watch(parent_pipe.fileno(),

2030

gobject.IO_IN | gobject.IO_HUP,

2031

functools.partial(self.handle_ipc,

2032

parent_pipe =

2033

parent_pipe,

2034

proc = proc))

2035

2036

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

2037

proc = None, client_object=None):

2559

GLib.io_add_watch(

2560

parent_pipe.fileno(),

2561

GLib.IO_IN | GLib.IO_HUP,

2562

functools.partial(self.handle_ipc,

2563

parent_pipe=parent_pipe,

2564

proc=proc))

2565

2566

def handle_ipc(self, source, condition,

2567

parent_pipe=None,

2568

proc=None,

2569

client_object=None):

2038

2570

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

2039

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

2571

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

2040

2572

# Wait for other process to exit

2041

2573

proc.join()

2042

2574

return False

2043

2575

2044

2576

# Read a request from the child

2045

2577

request = parent_pipe.recv()

2046

2578

command = request[0]

2047

2579

2048

2580

if command == 'init':

2049

fpr = request[1]

2581

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

2050

2582

address = request[2]

2051

2052

for c in self.clients.itervalues():

2583

2584

for c in self.clients.values():

2053

2585

if c.fingerprint == fpr:

2054

2586

client = c

2055

2587

break

2062

2594

address[0])

2063

2595

parent_pipe.send(False)

2064

2596

return False

2065

2066

gobject.io_add_watch(parent_pipe.fileno(),

2067

gobject.IO_IN | gobject.IO_HUP,

2068

functools.partial(self.handle_ipc,

2069

parent_pipe =

2070

parent_pipe,

2071

proc = proc,

2072

client_object =

2073

client))

2597

2598

GLib.io_add_watch(

2599

parent_pipe.fileno(),

2600

GLib.IO_IN | GLib.IO_HUP,

2601

functools.partial(self.handle_ipc,

2602

parent_pipe=parent_pipe,

2603

proc=proc,

2604

client_object=client))

2074

2605

parent_pipe.send(True)

2075

2606

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

2076

2607

# same fileno

2079

2610

funcname = request[1]

2080

2611

args = request[2]

2081

2612

kwargs = request[3]

2082

2613

2083

2614

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

2084

2615

funcname)(*args,

2085

**kwargs)))

2086

2616

**kwargs)))

2617

2087

2618

if command == 'getattr':

2088

2619

attrname = request[1]

2089

if callable(client_object.__getattribute__(attrname)):

2090

parent_pipe.send(('function',))

2620

if isinstance(client_object.__getattribute__(attrname),

2621

collections.Callable):

2622

parent_pipe.send(('function', ))

2091

2623

else:

2092

parent_pipe.send(('data', client_object

2093

.__getattribute__(attrname)))

2094

2624

parent_pipe.send((

2625

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

2626

2095

2627

if command == 'setattr':

2096

2628

attrname = request[1]

2097

2629

value = request[2]

2098

2630

setattr(client_object, attrname, value)

2099

2631

2100

2632

return True

2101

2633

2102

2634

2103

2635

def rfc3339_duration_to_delta(duration):

2104

2636

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

2105

2637

2106

2638

>>> rfc3339_duration_to_delta("P7D")

2107

2639

datetime.timedelta(7)

2108

2640

>>> rfc3339_duration_to_delta("PT60S")

2118

2650

>>> rfc3339_duration_to_delta("P1DT3M20S")

2119

2651

datetime.timedelta(1, 200)

2120

2652

"""

2121

2653

2122

2654

# Parsing an RFC 3339 duration with regular expressions is not

2123

2655

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

2124

2656

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

2125

2657

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

2126

2658

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

2127

2659

# avoid excessive use of external libraries.

2128

2660

2129

2661

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

2130

Token = collections.namedtuple("Token",

2131

("regexp", # To match token; if

2132

# "value" is not None,

2133

# must have a "group"

2134

# containing digits

2135

"value", # datetime.timedelta or

2136

# None

2137

"followers")) # Tokens valid after

2138

# this token

2662

Token = collections.namedtuple("Token", (

2663

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

2664

# a "group" containing digits

2665

"value", # datetime.timedelta or None

2666

"followers")) # Tokens valid after this token

2139

2667

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

2140

2668

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

2141

2669

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

2142

2670

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

2143

2671

datetime.timedelta(seconds=1),

2144

frozenset((token_end,)))

2672

frozenset((token_end, )))

2145

2673

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

2146

2674

datetime.timedelta(minutes=1),

2147

2675

frozenset((token_second, token_end)))

2163

2691

frozenset((token_month, token_end)))

2164

2692

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

2165

2693

datetime.timedelta(weeks=1),

2166

frozenset((token_end,)))

2694

frozenset((token_end, )))

2167

2695

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

2168

2696

frozenset((token_year, token_month,

2169

2697

token_day, token_time,

2170

token_week))),

2171

# Define starting values

2172

value = datetime.timedelta() # Value so far

2698

token_week)))

2699

# Define starting values:

2700

# Value so far

2701

value = datetime.timedelta()

2173

2702

found_token = None

2174

followers = frozenset(token_duration,) # Following valid tokens

2175

s = duration # String left to parse

2703

# Following valid tokens

2704

followers = frozenset((token_duration, ))

2705

# String left to parse

2706

s = duration

2176

2707

# Loop until end token is found

2177

2708

while found_token is not token_end:

2178

2709

# Search for any currently valid tokens

2194

2725

break

2195

2726

else:

2196

2727

# No currently valid tokens were found

2197

raise ValueError("Invalid RFC 3339 duration")

2728

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

2729

.format(duration))

2198

2730

# End token found

2199

2731

return value

2200

2732

2201

2733

2202

2734

def string_to_delta(interval):

2203

2735

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

2204

2736

2205

2737

>>> string_to_delta('7d')

2206

2738

datetime.timedelta(7)

2207

2739

>>> string_to_delta('60s')

2215

2747

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

2216

2748

datetime.timedelta(0, 330)

2217

2749

"""

2218

2750

2219

2751

try:

2220

2752

return rfc3339_duration_to_delta(interval)

2221

2753

except ValueError:

2222

2754

pass

2223

2755

2224

2756

timevalue = datetime.timedelta(0)

2225

2757

for s in interval.split():

2226

2758

try:

2227

suffix = unicode(s[-1])

2759

suffix = s[-1]

2228

2760

value = int(s[:-1])

2229

2761

if suffix == "d":

2230

2762

delta = datetime.timedelta(value)

2237

2769

elif suffix == "w":

2238

2770

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

2239

2771

else:

2240

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

2241

.format(suffix))

2242

except (ValueError, IndexError) as e:

2772

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

2773

except IndexError as e:

2243

2774

raise ValueError(*(e.args))

2244

2775

timevalue += delta

2245

2776

return timevalue

2246

2777

2247

2778

2248

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

2779

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

2249

2780

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

2250

2781

2251

2782

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

2252

2783

if os.fork():

2253

2784

sys.exit()

2261

2792

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

2262

2793

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

2263

2794

raise OSError(errno.ENODEV,

2264

"{0} not a character device"

2795

"{} not a character device"

2265

2796

.format(os.devnull))

2266

2797

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

2267

2798

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

2271

2802

2272

2803

2273

2804

def main():

2274

2805

2275

2806

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

2276

2807

# Parsing of options, both command line and config file

2277

2808

2278

2809

parser = argparse.ArgumentParser()

2279

2810

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

2280

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

2811

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

2281

2812

help="show version number and exit")

2282

2813

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

2283

2814

help="Bind to interface IF")

2289

2820

help="Run self-test")

2290

2821

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

2291

2822

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

2292

" to terminal")

2823

" to terminal", default=None)

2293

2824

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

2294

2825

help="Debug level for stdout output")

2295

2826

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

2302

2833

" files")

2303

2834

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

2304

2835

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

2305

" system bus interface")

2836

" system bus interface", default=None)

2306

2837

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

2307

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

2838

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

2839

default=None)

2308

2840

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

2309

2841

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

2310

" state")

2842

" state", default=None)

2311

2843

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

2312

2844

help="Specify a file descriptor to a network"

2313

2845

" socket to use instead of creating one")

2314

2846

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

2315

2847

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

2316

2848

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

2317

help="Run in foreground")

2318

2849

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

2850

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

2851

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

2852

default=None)

2853

2319

2854

options = parser.parse_args()

2320

2855

2321

2856

if options.check:

2322

2857

import doctest

2323

doctest.testmod()

2324

sys.exit()

2325

2858

fail_count, test_count = doctest.testmod()

2859

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

2860

2326

2861

# Default values for config file for server-global settings

2327

server_defaults = { "interface": "",

2328

"address": "",

2329

"port": "",

2330

"debug": "False",

2331

"priority":

2332

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

2333

"servicename": "Mandos",

2334

"use_dbus": "True",

2335

"use_ipv6": "True",

2336

"debuglevel": "",

2337

"restore": "True",

2338

"socket": "",

2339

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

2340

"foreground": "False",

2341

}

2342

2862

server_defaults = {"interface": "",

2863

"address": "",

2864

"port": "",

2865

"debug": "False",

2866

"priority":

2867

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

2868

":+SIGN-DSA-SHA256",

2869

"servicename": "Mandos",

2870

"use_dbus": "True",

2871

"use_ipv6": "True",

2872

"debuglevel": "",

2873

"restore": "True",

2874

"socket": "",

2875

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

2876

"foreground": "False",

2877

"zeroconf": "True",

2878

}

2879

2343

2880

# Parse config file for server-global settings

2344

2881

server_config = configparser.SafeConfigParser(server_defaults)

2345

2882

del server_defaults

2346

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

2347

"mandos.conf"))

2883

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

2348

2884

# Convert the SafeConfigParser object to a dict

2349

2885

server_settings = server_config.defaults()

2350

2886

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

2351

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

2887

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

2888

"foreground", "zeroconf"):

2352

2889

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

2353

2890

option)

2354

2891

if server_settings["port"]:

2364

2901

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

2365

2902

["socket"])

2366

2903

del server_config

2367

2904

2368

2905

# Override the settings from the config file with command line

2369

2906

# options, if set.

2370

2907

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

2371

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

2372

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

2373

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

2908

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

2909

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

2910

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

2374

2911

value = getattr(options, option)

2375

2912

if value is not None:

2376

2913

server_settings[option] = value

2377

2914

del options

2378

2915

# Force all strings to be unicode

2379

2916

for option in server_settings.keys():

2380

if type(server_settings[option]) is str:

2381

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

2917

if isinstance(server_settings[option], bytes):

2918

server_settings[option] = (server_settings[option]

2919

.decode("utf-8"))

2920

# Force all boolean options to be boolean

2921

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

2922

"foreground", "zeroconf"):

2923

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

2382

2924

# Debug implies foreground

2383

2925

if server_settings["debug"]:

2384

2926

server_settings["foreground"] = True

2385

2927

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

2386

2928

2387

2929

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

2388

2930

2931

if (not server_settings["zeroconf"]

2932

and not (server_settings["port"]

2933

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

2934

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

2935

2389

2936

# For convenience

2390

2937

debug = server_settings["debug"]

2391

2938

debuglevel = server_settings["debuglevel"]

2394

2941

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

2395

2942

stored_state_file)

2396

2943

foreground = server_settings["foreground"]

2397

2944

zeroconf = server_settings["zeroconf"]

2945

2398

2946

if debug:

2399

2947

initlogger(debug, logging.DEBUG)

2400

2948

else:

2403

2951

else:

2404

2952

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

2405

2953

initlogger(debug, level)

2406

2954

2407

2955

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

2408

syslogger.setFormatter(logging.Formatter

2409

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

2410

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

2411

.format(server_settings

2412

["servicename"])))

2413

2956

syslogger.setFormatter(

2957

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

2958

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

2959

server_settings["servicename"])))

2960

2414

2961

# Parse config file with clients

2415

2962

client_config = configparser.SafeConfigParser(Client

2416

2963

.client_defaults)

2417

2964

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

2418

2965

"clients.conf"))

2419

2966

2420

2967

global mandos_dbus_service

2421

2968

mandos_dbus_service = None

2422

2423

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

2424

server_settings["port"]),

2425

ClientHandler,

2426

interface=(server_settings["interface"]

2427

or None),

2428

use_ipv6=use_ipv6,

2429

gnutls_priority=

2430

server_settings["priority"],

2431

use_dbus=use_dbus,

2432

socketfd=(server_settings["socket"]

2433

or None))

2969

2970

socketfd = None

2971

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

2972

socketfd = server_settings["socket"]

2973

tcp_server = MandosServer(

2974

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

2975

ClientHandler,

2976

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

2977

use_ipv6=use_ipv6,

2978

gnutls_priority=server_settings["priority"],

2979

use_dbus=use_dbus,

2980

socketfd=socketfd)

2434

2981

if not foreground:

2435

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

2982

pidfilename = "/run/mandos.pid"

2983

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

2984

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

2436

2985

pidfile = None

2437

2986

try:

2438

pidfile = open(pidfilename, "w")

2987

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

2439

2988

except IOError as e:

2440

2989

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

2441

2990

exc_info=e)

2442

2443

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

2991

2992

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

2993

("mandos", "mandos"),

2994

("nobody", "nogroup")):

2444

2995

try:

2445

2996

uid = pwd.getpwnam(name).pw_uid

2446

gid = pwd.getpwnam(name).pw_gid

2997

gid = pwd.getpwnam(group).pw_gid

2447

2998

break

2448

2999

except KeyError:

2449

3000

continue

2453

3004

try:

2454

3005

os.setgid(gid)

2455

3006

os.setuid(uid)

3007

if debug:

3008

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

3009

gid))

2456

3010

except OSError as error:

3011

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

3012

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

2457

3013

if error.errno != errno.EPERM:

2458

raise error

2459

3014

raise

3015

2460

3016

if debug:

2461

3017

# Enable all possible GnuTLS debugging

2462

3018

2463

3019

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

2464

3020

# - GnuTLS manual

2465

gnutls.library.functions.gnutls_global_set_log_level(11)

2466

2467

@gnutls.library.types.gnutls_log_func

3021

gnutls.global_set_log_level(11)

3022

3023

@gnutls.log_func

2468

3024

def debug_gnutls(level, string):

2469

3025

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

2470

2471

(gnutls.library.functions

2472

.gnutls_global_set_log_function(debug_gnutls))

2473

3026

3027

gnutls.global_set_log_function(debug_gnutls)

3028

2474

3029

# Redirect stdin so all checkers get /dev/null

2475

3030

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

2476

3031

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

2477

3032

if null > 2:

2478

3033

os.close(null)

2479

3034

2480

3035

# Need to fork before connecting to D-Bus

2481

3036

if not foreground:

2482

3037

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

2483

3038

daemon()

2484

2485

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

2486

# need to inform gobject that threads will be used.

2487

gobject.threads_init()

2488

3039

3040

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

3041

# to inform GLib that threads will be used.

3042

GLib.threads_init()

3043

2489

3044

global main_loop

2490

3045

# From the Avahi example code

2491

3046

DBusGMainLoop(set_as_default=True)

2492

main_loop = gobject.MainLoop()

3047

main_loop = GLib.MainLoop()

2493

3048

bus = dbus.SystemBus()

2494

3049

# End of Avahi example code

2495

3050

if use_dbus:

2496

3051

try:

2497

3052

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

2498

bus, do_not_queue=True)

2499

old_bus_name = (dbus.service.BusName

2500

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

2501

do_not_queue=True))

2502

except dbus.exceptions.NameExistsException as e:

3053

bus,

3054

do_not_queue=True)

3055

old_bus_name = dbus.service.BusName(

3056

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

3057

do_not_queue=True)

3058

except dbus.exceptions.DBusException as e:

2503

3059

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

2504

3060

use_dbus = False

2505

3061

server_settings["use_dbus"] = False

2506

3062

tcp_server.use_dbus = False

2507

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2508

service = AvahiServiceToSyslog(name =

2509

server_settings["servicename"],

2510

servicetype = "_mandos._tcp",

2511

protocol = protocol, bus = bus)

2512

if server_settings["interface"]:

2513

service.interface = (if_nametoindex

2514

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

2515

3063

if zeroconf:

3064

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3065

service = AvahiServiceToSyslog(

3066

name=server_settings["servicename"],

3067

servicetype="_mandos._tcp",

3068

protocol=protocol,

3069

bus=bus)

3070

if server_settings["interface"]:

3071

service.interface = if_nametoindex(

3072

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

3073

2516

3074

global multiprocessing_manager

2517

3075

multiprocessing_manager = multiprocessing.Manager()

2518

3076

2519

3077

client_class = Client

2520

3078

if use_dbus:

2521

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

2522

3079

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

3080

2523

3081

client_settings = Client.config_parser(client_config)

2524

3082

old_client_settings = {}

2525

3083

clients_data = {}

2526

3084

3085

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

3086

global wnull

3087

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

3088

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

3089

# mode

3090

if debug or not foreground:

3091

wnull.close()

3092

2527

3093

# Get client data and settings from last running state.

2528

3094

if server_settings["restore"]:

2529

3095

try:

2530

3096

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

2531

clients_data, old_client_settings = (pickle.load

2532

(stored_state))

3097

if sys.version_info.major == 2:

3098

clients_data, old_client_settings = pickle.load(

3099

stored_state)

3100

else:

3101

bytes_clients_data, bytes_old_client_settings = (

3102

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

3103

# Fix bytes to strings

3104

# clients_data

3105

# .keys()

3106

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

3107

if isinstance(key, bytes)

3108

else key): value

3109

for key, value in

3110

bytes_clients_data.items()}

3111

del bytes_clients_data

3112

for key in clients_data:

3113

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

3114

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

3115

for k, v in

3116

clients_data[key].items()}

3117

clients_data[key] = value

3118

# .client_structure

3119

value["client_structure"] = [

3120

(s.decode("utf-8")

3121

if isinstance(s, bytes)

3122

else s) for s in

3123

value["client_structure"]]

3124

# .name & .host

3125

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

3126

if isinstance(value[k], bytes):

3127

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

3128

# old_client_settings

3129

# .keys()

3130

old_client_settings = {

3131

(key.decode("utf-8")

3132

if isinstance(key, bytes)

3133

else key): value

3134

for key, value in

3135

bytes_old_client_settings.items()}

3136

del bytes_old_client_settings

3137

# .host

3138

for value in old_client_settings.values():

3139

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

3140

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

3141

.decode("utf-8"))

2533

3142

os.remove(stored_state_path)

2534

3143

except IOError as e:

2535

3144

if e.errno == errno.ENOENT:

2536

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

2537

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

3145

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

3146

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

2538

3147

else:

2539

3148

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

2540

3149

exc_info=e)

2541

3150

raise

2542

3151

except EOFError as e:

2543

3152

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

2544

"EOFError:", exc_info=e)

2545

3153

"EOFError:",

3154

exc_info=e)

3155

2546

3156

with PGPEngine() as pgp:

2547

for client_name, client in clients_data.iteritems():

3157

for client_name, client in clients_data.items():

3158

# Skip removed clients

3159

if client_name not in client_settings:

3160

continue

3161

2548

3162

# Decide which value to use after restoring saved state.

2549

3163

# We have three different values: Old config file,

2550

3164

# new config file, and saved state.

2555

3169

# For each value in new config, check if it

2556

3170

# differs from the old config value (Except for

2557

3171

# the "secret" attribute)

2558

if (name != "secret" and

2559

value != old_client_settings[client_name]

2560

[name]):

3172

if (name != "secret"

3173

and (value !=

3174

old_client_settings[client_name][name])):

2561

3175

client[name] = value

2562

3176

except KeyError:

2563

3177

pass

2564

3178

2565

3179

# Clients who has passed its expire date can still be

2566

# enabled if its last checker was successful. Clients

3180

# enabled if its last checker was successful. A Client

2567

3181

# whose checker succeeded before we stored its state is

2568

3182

# assumed to have successfully run all checkers during

2569

3183

# downtime.

2571

3185

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

2572

3186

if not client["last_checked_ok"]:

2573

3187

logger.warning(

2574

"disabling client {0} - Client never "

2575

"performed a successful checker"

2576

.format(client_name))

3188

"disabling client {} - Client never "

3189

"performed a successful checker".format(

3190

client_name))

2577

3191

client["enabled"] = False

2578

3192

elif client["last_checker_status"] != 0:

2579

3193

logger.warning(

2580

"disabling client {0} - Client "

2581

"last checker failed with error code {1}"

2582

.format(client_name,

2583

client["last_checker_status"]))

3194

"disabling client {} - Client last"

3195

" checker failed with error code"

3196

" {}".format(

3197

client_name,

3198

client["last_checker_status"]))

2584

3199

client["enabled"] = False

2585

3200

else:

2586

client["expires"] = (datetime.datetime

2587

.utcnow()

2588

+ client["timeout"])

3201

client["expires"] = (

3202

datetime.datetime.utcnow()

3203

+ client["timeout"])

2589

3204

logger.debug("Last checker succeeded,"

2590

" keeping {0} enabled"

2591

.format(client_name))

3205

" keeping {} enabled".format(

3206

client_name))

2592

3207

try:

2593

client["secret"] = (

2594

pgp.decrypt(client["encrypted_secret"],

2595

client_settings[client_name]

2596

["secret"]))

3208

client["secret"] = pgp.decrypt(

3209

client["encrypted_secret"],

3210

client_settings[client_name]["secret"])

2597

3211

except PGPError:

2598

3212

# If decryption fails, we use secret from new settings

2599

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

2600

.format(client_name))

2601

client["secret"] = (

2602

client_settings[client_name]["secret"])

2603

3213

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

3214

client_name))

3215

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

3216

["secret"])

3217

2604

3218

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

2605

3219

for client_name in (set(old_client_settings)

2606

3220

- set(client_settings)):

2608

3222

for client_name in (set(client_settings)

2609

3223

- set(old_client_settings)):

2610

3224

clients_data[client_name] = client_settings[client_name]

2611

3225

2612

3226

# Create all client objects

2613

for client_name, client in clients_data.iteritems():

3227

for client_name, client in clients_data.items():

2614

3228

tcp_server.clients[client_name] = client_class(

2615

name = client_name, settings = client)

2616

3229

name=client_name,

3230

settings=client,

3231

server_settings=server_settings)

3232

2617

3233

if not tcp_server.clients:

2618

3234

logger.warning("No clients defined")

2619

3235

2620

3236

if not foreground:

2621

3237

if pidfile is not None:

3238

pid = os.getpid()

2622

3239

try:

2623

3240

with pidfile:

2624

pid = os.getpid()

2625

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

3241

print(pid, file=pidfile)

2626

3242

except IOError:

2627

3243

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

2628

3244

pidfilename, pid)

2629

3245

del pidfile

2630

3246

del pidfilename

2631

2632

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

2633

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

2634

3247

3248

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

3249

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3250

lambda: main_loop.quit() and False)

3251

2635

3252

if use_dbus:

2636

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

2637

"se.bsnet.fukt.Mandos"})

2638

class MandosDBusService(DBusObjectWithProperties):

3253

3254

@alternate_dbus_interfaces(

3255

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

3256

class MandosDBusService(DBusObjectWithObjectManager):

2639

3257

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

3258

2640

3259

def __init__(self):

2641

3260

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

3261

2642

3262

_interface = "se.recompile.Mandos"

2643

2644

@dbus_interface_annotations(_interface)

2645

def _foo(self):

2646

return { "org.freedesktop.DBus.Property"

2647

".EmitsChangedSignal":

2648

"false"}

2649

3263

2650

3264

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

2651

3265

def ClientAdded(self, objpath):

2652

3266

"D-Bus signal"

2653

3267

pass

2654

3268

2655

3269

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

2656

3270

def ClientNotFound(self, fingerprint, address):

2657

3271

"D-Bus signal"

2658

3272

pass

2659

3273

3274

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

3275

"true"})

2660

3276

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

2661

3277

def ClientRemoved(self, objpath, name):

2662

3278

"D-Bus signal"

2663

3279

pass

2664

3280

3281

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

3282

"true"})

2665

3283

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

2666

3284

def GetAllClients(self):

2667

3285

"D-Bus method"

2668

return dbus.Array(c.dbus_object_path

2669

for c in

2670

tcp_server.clients.itervalues())

2671

3286

return dbus.Array(c.dbus_object_path for c in

3287

tcp_server.clients.values())

3288

3289

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

3290

"true"})

2672

3291

@dbus.service.method(_interface,

2673

3292

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

2674

3293

def GetAllClientsWithProperties(self):

2675

3294

"D-Bus method"

2676

3295

return dbus.Dictionary(

2677

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

2678

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

3296

{c.dbus_object_path: c.GetAll(

3297

"se.recompile.Mandos.Client")

3298

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

2679

3299

signature="oa{sv}")

2680

3300

2681

3301

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

2682

3302

def RemoveClient(self, object_path):

2683

3303

"D-Bus method"

2684

for c in tcp_server.clients.itervalues():

3304

for c in tcp_server.clients.values():

2685

3305

if c.dbus_object_path == object_path:

2686

3306

del tcp_server.clients[c.name]

2687

3307

c.remove_from_connection()

2688

# Don't signal anything except ClientRemoved

3308

# Don't signal the disabling

2689

3309

c.disable(quiet=True)

2690

# Emit D-Bus signal

2691

self.ClientRemoved(object_path, c.name)

3310

# Emit D-Bus signal for removal

3311

self.client_removed_signal(c)

2692

3312

return

2693

3313

raise KeyError(object_path)

2694

3314

2695

3315

del _interface

2696

3316

3317

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3318

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

3319

def GetManagedObjects(self):

3320

"""D-Bus method"""

3321

return dbus.Dictionary(

3322

{client.dbus_object_path:

3323

dbus.Dictionary(

3324

{interface: client.GetAll(interface)

3325

for interface in

3326

client._get_all_interface_names()})

3327

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

3328

3329

def client_added_signal(self, client):

3330

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

3331

if use_dbus:

3332

# New standard signal

3333

self.InterfacesAdded(

3334

client.dbus_object_path,

3335

dbus.Dictionary(

3336

{interface: client.GetAll(interface)

3337

for interface in

3338

client._get_all_interface_names()}))

3339

# Old signal

3340

self.ClientAdded(client.dbus_object_path)

3341

3342

def client_removed_signal(self, client):

3343

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

3344

if use_dbus:

3345

# New standard signal

3346

self.InterfacesRemoved(

3347

client.dbus_object_path,

3348

client._get_all_interface_names())

3349

# Old signal

3350

self.ClientRemoved(client.dbus_object_path,

3351

client.name)

3352

2697

3353

mandos_dbus_service = MandosDBusService()

2698

3354

3355

# Save modules to variables to exempt the modules from being

3356

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

3357

mp = multiprocessing

3358

wn = wnull

3359

2699

3360

def cleanup():

2700

3361

"Cleanup function; run on exit"

2701

service.cleanup()

2702

2703

multiprocessing.active_children()

3362

if zeroconf:

3363

service.cleanup()

3364

3365

mp.active_children()

3366

wn.close()

2704

3367

if not (tcp_server.clients or client_settings):

2705

3368

return

2706

3369

2707

3370

# Store client before exiting. Secrets are encrypted with key

2708

3371

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

2709

3372

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

2710

3373

clients = {}

2711

3374

with PGPEngine() as pgp:

2712

for client in tcp_server.clients.itervalues():

3375

for client in tcp_server.clients.values():

2713

3376

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

2714

3377

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

2715

3378

key)

2716

3379

client_dict = {}

2717

3380

2718

3381

# A list of attributes that can not be pickled

2719

3382

# + secret.

2720

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

2721

"checker"))

2722

for name, typ in (inspect.getmembers

2723

(dbus.service.Object)):

3383

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

3384

"checker", "server_settings"}

3385

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

3386

.Object):

2724

3387

exclude.add(name)

2725

3388

2726

3389

client_dict["encrypted_secret"] = (client

2727

3390

.encrypted_secret)

2728

3391

for attr in client.client_structure:

2729

3392

if attr not in exclude:

2730

3393

client_dict[attr] = getattr(client, attr)

2731

3394

2732

3395

clients[client.name] = client_dict

2733

3396

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

2734

3397

2735

3398

try:

2736

with (tempfile.NamedTemporaryFile

2737

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

2738

dir=os.path.dirname(stored_state_path),

2739

delete=False)) as stored_state:

2740

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

2741

tempname=stored_state.name

3399

with tempfile.NamedTemporaryFile(

3400

mode='wb',

3401

suffix=".pickle",

3402

prefix='clients-',

3403

dir=os.path.dirname(stored_state_path),

3404

delete=False) as stored_state:

3405

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

3406

protocol=2)

3407

tempname = stored_state.name

2742

3408

os.rename(tempname, stored_state_path)

2743

3409

except (IOError, OSError) as e:

2744

3410

if not debug:

2747

3413

except NameError:

2748

3414

pass

2749

3415

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

2750

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

3416

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

2751

3417

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

2752

3418

else:

2753

3419

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

2754

3420

exc_info=e)

2755

raise e

2756

3421

raise

3422

2757

3423

# Delete all clients, and settings from config

2758

3424

while tcp_server.clients:

2759

3425

name, client = tcp_server.clients.popitem()

2760

3426

if use_dbus:

2761

3427

client.remove_from_connection()

2762

# Don't signal anything except ClientRemoved

3428

# Don't signal the disabling

2763

3429

client.disable(quiet=True)

3430

# Emit D-Bus signal for removal

2764

3431

if use_dbus:

2765

# Emit D-Bus signal

2766

mandos_dbus_service.ClientRemoved(client

2767

.dbus_object_path,

2768

client.name)

3432

mandos_dbus_service.client_removed_signal(client)

2769

3433

client_settings.clear()

2770

3434

2771

3435

atexit.register(cleanup)

2772

2773

for client in tcp_server.clients.itervalues():

3436

3437

for client in tcp_server.clients.values():

2774

3438

if use_dbus:

2775

# Emit D-Bus signal

2776

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3439

# Emit D-Bus signal for adding

3440

mandos_dbus_service.client_added_signal(client)

2777

3441

# Need to initiate checking of clients

2778

3442

if client.enabled:

2779

3443

client.init_checker()

2780

3444

2781

3445

tcp_server.enable()

2782

3446

tcp_server.server_activate()

2783

3447

2784

3448

# Find out what port we got

2785

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

3449

if zeroconf:

3450

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

2786

3451

if use_ipv6:

2787

3452

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

2788

3453

" flowinfo %d, scope_id %d",

2790

3455

else: # IPv4

2791

3456

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

2792

3457

*tcp_server.socket.getsockname())

2793

2794

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

2795

3458

3459

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

3460

2796

3461

try:

2797

# From the Avahi example code

2798

try:

2799

service.activate()

2800

except dbus.exceptions.DBusException as error:

2801

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

2802

cleanup()

2803

sys.exit(1)

2804

# End of Avahi example code

2805

2806

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

2807

lambda *args, **kwargs:

2808

(tcp_server.handle_request

2809

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

2810

3462

if zeroconf:

3463

# From the Avahi example code

3464

try:

3465

service.activate()

3466

except dbus.exceptions.DBusException as error:

3467

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

3468

cleanup()

3469

sys.exit(1)

3470

# End of Avahi example code

3471

3472

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

3473

lambda *args, **kwargs:

3474

(tcp_server.handle_request

3475

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

3476

2811

3477

logger.debug("Starting main loop")

2812

3478

main_loop.run()

2813

3479

except AvahiError as error:

2822

3488

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

2823

3489

cleanup()

2824

3490

3491

2825

3492

if __name__ == '__main__':

2826

3493

main()