/mandos/trunk : revision 907

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.2"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.15"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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

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self.gnupgargs.append("--no-use-agent")

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def __enter__(self):

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return self

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def __exit__(self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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topdown=False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

291

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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303

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class AvahiError(Exception):

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

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self.value = value

224

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

225

def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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314

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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321

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Attributes:

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

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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self.name = name

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353

self.type = servicetype

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362

self.server = None

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self.bus = bus

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364

self.entry_group_state_changed_match = None

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def rename(self):

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366

def rename(self, remove=True):

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

277

368

if self.rename_count >= self.max_renames:

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369

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

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370

" after %i retries, exiting.",

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self.rename_count)

281

372

raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

284

376

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

285

377

self.name)

286

self.remove()

378

if remove:

379

self.remove()

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380

try:

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381

self.add()

289

382

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

295

392

def remove(self):

296

393

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

297

394

if self.entry_group_state_changed_match is not None:

299

396

self.entry_group_state_changed_match = None

300

397

if self.group is not None:

301

398

self.group.Reset()

302

399

303

400

def add(self):

304

401

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

305

402

self.remove()

322

419

dbus.UInt16(self.port),

323

420

avahi.string_array_to_txt_array(self.TXT))

324

421

self.group.Commit()

325

422

326

423

def entry_group_state_changed(self, state, error):

327

424

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

328

425

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

329

426

330

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

331

428

logger.debug("Zeroconf service established.")

332

429

elif state == avahi.ENTRY_GROUP_COLLISION:

334

431

self.rename()

335

432

elif state == avahi.ENTRY_GROUP_FAILURE:

336

433

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

337

unicode(error))

338

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

339

.format(error))

340

434

str(error))

435

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

436

341

437

def cleanup(self):

342

438

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

343

439

if self.group is not None:

348

444

pass

349

445

self.group = None

350

446

self.remove()

351

447

352

448

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

353

449

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

354

450

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

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

362

457

if state in bad_states:

363

458

if bad_states[state] is not None:

364

459

if error is None:

367

462

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

368

463

self.cleanup()

369

464

elif state == avahi.SERVER_RUNNING:

370

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

371

477

else:

372

478

if error is None:

373

479

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

374

480

else:

375

481

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

376

482

377

483

def activate(self):

378

484

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

379

485

if self.server is None:

383

489

follow_name_owner_changes=True),

384

490

avahi.DBUS_INTERFACE_SERVER)

385

491

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

492

self.server_state_changed)

387

493

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

388

494

389

495

390

496

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

497

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

392

498

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

398

503

return ret

399

504

400

505

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

518

def __init__(self):

519

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

520

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

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

def call_pipe(connection, # : multiprocessing.Connection

770

func, *args, **kwargs):

771

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

772

773

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

774

return value on the provided multiprocessing.Connection.

775

"""

776

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

777

connection.close()

406

778

407

779

408

780

class Client(object):

409

781

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

410

782

411

783

Attributes:

412

784

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

413

785

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

415

787

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

416

788

to see if the client lives.

417

789

'None' if no process is running.

418

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

419

791

checker_command: string; External command which is run to check

420

792

if client lives. %() expansions are done at

421

793

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

422

794

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

423

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

424

796

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

425

797

client_structure: Object describing what attributes a client has

426

798

and is used for storing the client at exit

427

799

current_checker_command: string; current running checker_command

428

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

429

801

enabled: bool()

430

802

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

431

803

uniquely identify the client

436

808

last_checker_status: integer between 0 and 255 reflecting exit

437

809

status of last checker. -1 reflects crashed

438

810

checker, -2 means no checker completed yet.

811

last_checker_signal: The signal which killed the last checker, if

812

last_checker_status is -1

439

813

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

440

814

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

441

815

D-Bus identifiers

448

822

disabled, or None

449

823

server_settings: The server_settings dict from main()

450

824

"""

451

825

452

826

runtime_expansions = ("approval_delay", "approval_duration",

453

827

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

454

828

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

455

829

"last_approval_request", "last_checked_ok",

456

830

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

831

client_defaults = {

832

"timeout": "PT5M",

833

"extended_timeout": "PT15M",

834

"interval": "PT2M",

835

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

836

"host": "",

837

"approval_delay": "PT0S",

838

"approval_duration": "PT1S",

839

"approved_by_default": "True",

840

"enabled": "True",

841

}

842

483

843

@staticmethod

484

844

def config_parser(config):

485

845

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

492

852

for client_name in config.sections():

493

853

section = dict(config.items(client_name))

494

854

client = settings[client_name] = {}

495

855

496

856

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

497

857

# Reformat values from string types to Python types

498

858

client["approved_by_default"] = config.getboolean(

499

859

client_name, "approved_by_default")

500

860

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

501

861

"enabled")

502

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

503

866

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

504

867

.replace(" ", ""))

505

868

if "secret" in section:

506

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

869

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

870

.encode("utf-8"),

871

"base64")

507

872

elif "secfile" in section:

508

873

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

509

874

(section["secfile"])),

510

875

"rb") as secfile:

511

876

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

512

877

else:

513

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

878

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

514

879

.format(section))

515

880

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

516

881

client["extended_timeout"] = string_to_delta(

524

889

client["last_approval_request"] = None

525

890

client["last_checked_ok"] = None

526

891

client["last_checker_status"] = -2

527

892

528

893

return settings

529

530

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

894

895

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

531

896

self.name = name

532

897

if server_settings is None:

533

898

server_settings = {}

534

899

self.server_settings = server_settings

535

900

# adding all client settings

536

for setting, value in settings.iteritems():

901

for setting, value in settings.items():

537

902

setattr(self, setting, value)

538

903

539

904

if self.enabled:

540

905

if not hasattr(self, "last_enabled"):

541

906

self.last_enabled = datetime.datetime.utcnow()

545

910

else:

546

911

self.last_enabled = None

547

912

self.expires = None

548

913

549

914

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

553

915

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

554

916

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

555

917

datetime.datetime.utcnow())

556

918

557

919

# attributes specific for this server instance

558

920

self.checker = None

559

921

self.checker_initiator_tag = None

562

924

self.current_checker_command = None

563

925

self.approved = None

564

926

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

927

self.changedstate = multiprocessing_manager.Condition(

928

multiprocessing_manager.Lock())

929

self.client_structure = [attr

930

for attr in self.__dict__.keys()

570

931

if not attr.startswith("_")]

571

932

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

933

934

for name, t in inspect.getmembers(

935

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

577

936

if not name.startswith("_"):

578

937

self.client_structure.append(name)

579

938

580

939

# Send notice to process children that client state has changed

581

940

def send_changedstate(self):

582

941

with self.changedstate:

583

942

self.changedstate.notify_all()

584

943

585

944

def enable(self):

586

945

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

587

946

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

592

951

self.last_enabled = datetime.datetime.utcnow()

593

952

self.init_checker()

594

953

self.send_changedstate()

595

954

596

955

def disable(self, quiet=True):

597

956

"""Disable this client."""

598

957

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

600

959

if not quiet:

601

960

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

602

961

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

603

gobject.source_remove(self.disable_initiator_tag)

962

GLib.source_remove(self.disable_initiator_tag)

604

963

self.disable_initiator_tag = None

605

964

self.expires = None

606

965

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

607

gobject.source_remove(self.checker_initiator_tag)

966

GLib.source_remove(self.checker_initiator_tag)

608

967

self.checker_initiator_tag = None

609

968

self.stop_checker()

610

969

self.enabled = False

611

970

if not quiet:

612

971

self.send_changedstate()

613

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

972

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

614

973

return False

615

974

616

975

def __del__(self):

617

976

self.disable()

618

977

619

978

def init_checker(self):

620

979

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

621

980

# and every interval from then on.

622

981

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

984

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

985

self.start_checker)

627

986

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

628

987

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

990

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

633

991

# Also start a new checker *right now*.

634

992

self.start_checker()

635

636

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

637

996

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

638

997

self.checker_callback_tag = None

639

998

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

999

# Read return code from connection (see call_pipe)

1000

returncode = connection.recv()

1001

connection.close()

1002

1003

if returncode >= 0:

1004

self.last_checker_status = returncode

1005

self.last_checker_signal = None

642

1006

if self.last_checker_status == 0:

643

1007

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

644

1008

vars(self))

645

1009

self.checked_ok()

646

1010

else:

647

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

648

vars(self))

1011

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

649

1012

else:

650

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

651

1015

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

652

1016

vars(self))

653

1017

return False

1018

654

1019

def checked_ok(self):

655

1020

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

656

1021

self.last_checked_ok = datetime.datetime.utcnow()

657

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

658

1024

self.bump_timeout()

659

1025

660

1026

def bump_timeout(self, timeout=None):

661

1027

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

662

1028

if timeout is None:

663

1029

timeout = self.timeout

664

1030

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

666

1032

self.disable_initiator_tag = None

667

1033

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

671

1036

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

672

1037

673

1038

def need_approval(self):

674

1039

self.last_approval_request = datetime.datetime.utcnow()

675

1040

676

1041

def start_checker(self):

677

1042

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

678

1043

679

1044

If a checker already exists, leave it running and do

680

1045

nothing."""

681

1046

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

686

1051

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

687

1052

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

688

1053

# should be.

689

690

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

691

try:

692

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

693

except (AttributeError, OSError) as error:

694

if (isinstance(error, OSError)

695

and error.errno != errno.ECHILD):

696

raise error

697

else:

698

if pid:

699

logger.warning("Checker was a zombie")

700

gobject.source_remove(self.checker_callback_tag)

701

self.checker_callback(pid, status,

702

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

703

1059

# Start a new checker if needed

704

1060

if self.checker is None:

705

1061

# Escape attributes for the shell

706

escaped_attrs = dict(

707

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

708

for attr in

709

self.runtime_expansions)

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

710

1065

try:

711

1066

command = self.checker_command % escaped_attrs

712

1067

except TypeError as error:

713

1068

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

714

self.checker_command, exc_info=error)

715

return True # Try again later

1069

self.checker_command,

1070

exc_info=error)

1071

return True # Try again later

716

1072

self.current_checker_command = command

717

try:

718

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

719

command, self.name)

720

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

721

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

722

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

723

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

self.checker = subprocess.Popen(command,

733

close_fds=True,

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

758

# 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

759

1099

return True

760

1100

761

1101

def stop_checker(self):

762

1102

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

763

1103

if self.checker_callback_tag:

764

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

765

1105

self.checker_callback_tag = None

766

1106

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

767

1107

return

768

1108

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

769

try:

770

self.checker.terminate()

771

#time.sleep(0.5)

772

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

773

# self.checker.kill()

774

except OSError as error:

775

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

776

raise

1109

self.checker.terminate()

777

1110

self.checker = None

778

1111

779

1112

780

def dbus_service_property(dbus_interface, signature="v",

781

access="readwrite", byte_arrays=False):

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

782

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

783

1118

become properties on the D-Bus.

784

1119

785

1120

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

786

1121

and with one argument by "Set".

787

1122

788

1123

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

789

1124

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

790

1125

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

793

1128

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

794

1129

if byte_arrays and signature != "ay":

795

1130

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

796

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

1131

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

1132

797

1133

def decorator(func):

798

1134

func._dbus_is_property = True

799

1135

func._dbus_interface = dbus_interface

802

1138

func._dbus_name = func.__name__

803

1139

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

804

1140

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

805

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

806

1142

return func

1143

807

1144

return decorator

808

1145

809

1146

810

1147

def dbus_interface_annotations(dbus_interface):

811

1148

"""Decorator for marking functions returning interface annotations

812

1149

813

1150

Usage:

814

1151

815

1152

@dbus_interface_annotations("org.example.Interface")

816

1153

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

817

1154

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

818

1155

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

819

1156

"false"}

820

1157

"""

1158

821

1159

def decorator(func):

822

1160

func._dbus_is_interface = True

823

1161

func._dbus_interface = dbus_interface

824

1162

func._dbus_name = dbus_interface

825

1163

return func

1164

826

1165

return decorator

827

1166

828

1167

829

1168

def dbus_annotations(annotations):

830

1169

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

831

1170

Usage:

832

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

833

1175

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

834

1176

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

838

1177

def Property_dbus_property(self):

839

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

840

1181

"""

1182

841

1183

def decorator(func):

842

1184

func._dbus_annotations = annotations

843

1185

return func

1186

844

1187

return decorator

845

1188

846

1189

847

1190

class DBusPropertyException(dbus.exceptions.DBusException):

848

1191

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

849

1192

"""

850

def __unicode__(self):

851

return unicode(str(self))

1193

pass

852

1194

853

1195

854

1196

class DBusPropertyAccessException(DBusPropertyException):

863

1205

pass

864

1206

865

1207

866

class DBusObjectWithProperties(dbus.service.Object):

867

"""A D-Bus object with properties.

868

869

Classes inheriting from this can use the dbus_service_property

870

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

871

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.

872

1213

"""

873

1214

874

1215

@staticmethod

875

1216

def _is_dbus_thing(thing):

876

1217

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

877

1218

878

1219

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

879

1220

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

880

1221

"""

881

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

1222

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

882

1223

False)

883

1224

884

1225

def _get_all_dbus_things(self, thing):

885

1226

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

886

1227

"""

887

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

888

name),

1228

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

889

1229

athing.__get__(self))

890

1230

for cls in self.__class__.__mro__

891

1231

for name, athing in

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

894

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

895

1305

def _get_dbus_property(self, interface_name, property_name):

896

1306

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

897

1307

property with the specified name and interface.

898

1308

"""

899

for cls in self.__class__.__mro__:

900

for name, value in (inspect.getmembers

901

(cls,

902

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")):

903

1312

if (value._dbus_name == property_name

904

1313

and value._dbus_interface == interface_name):

905

1314

return value.__get__(self)

906

1315

907

1316

# No such property

908

raise DBusPropertyNotFound(self.dbus_object_path + ":"

909

+ interface_name + "."

910

+ property_name)

911

912

@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",

913

1331

out_signature="v")

914

1332

def Get(self, interface_name, property_name):

915

1333

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

921

1339

if not hasattr(value, "variant_level"):

922

1340

return value

923

1341

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

924

1342

925

1343

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

926

1344

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

927

1345

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

933

1351

# The byte_arrays option is not supported yet on

934

1352

# signatures other than "ay".

935

1353

if prop._dbus_signature != "ay":

936

raise ValueError

1354

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

1355

"'ay' signature {!r}"

1356

.format(prop._dbus_signature))

937

1357

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

938

1358

for byte in value))

939

1359

prop(value)

940

941

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

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

942

1363

out_signature="a{sv}")

943

1364

def GetAll(self, interface_name):

944

1365

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

945

1366

standard.

946

1367

947

1368

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

948

1369

"""

949

1370

properties = {}

959

1380

if not hasattr(value, "variant_level"):

960

1381

properties[name] = value

961

1382

continue

962

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

963

value.variant_level+1)

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

964

1385

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

965

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

966

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

967

1396

out_signature="s",

968

1397

path_keyword='object_path',

969

1398

connection_keyword='connection')

970

1399

def Introspect(self, object_path, connection):

971

1400

"""Overloading of standard D-Bus method.

972

1401

973

1402

Inserts property tags and interface annotation tags.

974

1403

"""

975

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

976

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

977

1407

try:

978

1408

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

1409

979

1410

def make_tag(document, name, prop):

980

1411

e = document.createElement("property")

981

1412

e.setAttribute("name", name)

982

1413

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

983

1414

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

984

1415

return e

1416

985

1417

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

986

1418

# Add property tags

987

1419

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

990

1422

if prop._dbus_interface

991

1423

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

992

1424

if_tag.appendChild(tag)

993

# Add annotation tags

994

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

995

for tag in if_tag.getElementsByTagName(typ):

996

annots = dict()

997

for name, prop in (self.

998

_get_all_dbus_things(typ)):

999

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

1000

and prop._dbus_interface

1001

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1007

ann_tag = document.createElement(

1008

"annotation")

1009

ann_tag.setAttribute("name", name)

1010

ann_tag.setAttribute("value", value)

1011

tag.appendChild(ann_tag)

1012

# Add interface annotation tags

1013

for annotation, value in dict(

1014

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1018

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

1019

)).iteritems():

1020

ann_tag = document.createElement("annotation")

1021

ann_tag.setAttribute("name", annotation)

1022

ann_tag.setAttribute("value", value)

1023

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)

1024

1441

# Add the names to the return values for the

1025

1442

# "org.freedesktop.DBus.Properties" methods

1026

1443

if (if_tag.getAttribute("name")

1045

1462

return xmlstring

1046

1463

1047

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

1048

1536

def datetime_to_dbus(dt, variant_level=0):

1049

1537

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

1050

1538

if dt is None:

1051

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

1052

return dbus.String(dt.isoformat(),

1053

variant_level=variant_level)

1539

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

1540

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

1054

1541

1055

1542

1056

1543

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

1545

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

1059

1546

interface names according to the "alt_interface_names" mapping.

1060

1547

Usage:

1061

1548

1062

1549

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

1063

1550

"net.example.AlternateInterface"})

1064

1551

class SampleDBusObject(dbus.service.Object):

1065

1552

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

1066

1553

def SampleDBusMethod():

1067

1554

pass

1068

1555

1069

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1070

1557

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

1071

1558

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

1072

1559

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

1073

1560

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

1074

1561

1075

1562

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

1076

1563

(from DBusObjectWithProperties) and interfaces (from the

1077

1564

dbus_interface_annotations decorator).

1078

1565

"""

1566

1079

1567

def wrapper(cls):

1080

1568

for orig_interface_name, alt_interface_name in (

1081

alt_interface_names.iteritems()):

1569

alt_interface_names.items()):

1082

1570

attr = {}

1083

1571

interface_names = set()

1084

1572

# Go though all attributes of the class

1086

1574

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

1087

1575

# with the wrong interface name

1088

1576

if (not hasattr(attribute, "_dbus_interface")

1089

or not attribute._dbus_interface

1090

.startswith(orig_interface_name)):

1577

or not attribute._dbus_interface.startswith(

1578

orig_interface_name)):

1091

1579

continue

1092

1580

# Create an alternate D-Bus interface name based on

1093

1581

# the current name

1094

alt_interface = (attribute._dbus_interface

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1582

alt_interface = attribute._dbus_interface.replace(

1583

orig_interface_name, alt_interface_name)

1097

1584

interface_names.add(alt_interface)

1098

1585

# Is this a D-Bus signal?

1099

1586

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

1100

1587

# Extract the original non-method undecorated

1101

1588

# function by black magic

1102

nonmethod_func = (dict(

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

1103

1591

zip(attribute.func_code.co_freevars,

1104

attribute.__closure__))["func"]

1105

.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)

1106

1599

# Create a new, but exactly alike, function

1107

1600

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

1108

1601

# with the alternate D-Bus interface name

1109

new_function = (dbus.service.signal

1110

(alt_interface,

1111

attribute._dbus_signature)

1112

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

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))

1118

1606

# Copy annotations, if any

1119

1607

try:

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1608

new_function._dbus_annotations = dict(

1609

attribute._dbus_annotations)

1122

1610

except AttributeError:

1123

1611

pass

1612

1124

1613

# Define a creator of a function to call both the

1125

1614

# original and alternate functions, so both the

1126

1615

# original and alternate signals gets sent when

1129

1618

"""This function is a scope container to pass

1130

1619

func1 and func2 to the "call_both" function

1131

1620

outside of its arguments"""

1621

1622

@functools.wraps(func2)

1132

1623

def call_both(*args, **kwargs):

1133

1624

"""This function will emit two D-Bus

1134

1625

signals by calling func1 and func2"""

1135

1626

func1(*args, **kwargs)

1136

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

1137

1634

return call_both

1138

1635

# Create the "call_both" function and add it to

1139

1636

# the class

1144

1641

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

1145

1642

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

1146

1643

# to the class.

1147

attr[attrname] = (dbus.service.method

1148

(alt_interface,

1149

attribute._dbus_in_signature,

1150

attribute._dbus_out_signature)

1151

(types.FunctionType

1152

(attribute.func_code,

1153

attribute.func_globals,

1154

attribute.func_name,

1155

attribute.func_defaults,

1156

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)))

1157

1650

# Copy annotations, if any

1158

1651

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1652

attr[attrname]._dbus_annotations = dict(

1653

attribute._dbus_annotations)

1161

1654

except AttributeError:

1162

1655

pass

1163

1656

# Is this a D-Bus property?

1166

1659

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

1167

1660

# property with the alternate D-Bus interface

1168

1661

# name. Add it to the class.

1169

attr[attrname] = (dbus_service_property

1170

(alt_interface,

1171

attribute._dbus_signature,

1172

attribute._dbus_access,

1173

attribute

1174

._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType

1177

(attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

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)))

1182

1668

# Copy annotations, if any

1183

1669

try:

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1670

attr[attrname]._dbus_annotations = dict(

1671

attribute._dbus_annotations)

1186

1672

except AttributeError:

1187

1673

pass

1188

1674

# Is this a D-Bus interface?

1191

1677

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

1192

1678

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

1193

1679

# to the class.

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1680

attr[attrname] = (

1681

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1202

1683

if deprecate:

1203

1684

# Deprecate all alternate interfaces

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1205

1686

for interface_name in interface_names:

1687

1206

1688

@dbus_interface_annotations(interface_name)

1207

1689

def func(self):

1208

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

1209

"true" }

1690

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

1691

"true"}

1210

1692

# Find an unused name

1211

1693

for aname in (iname.format(i)

1212

1694

for i in itertools.count()):

1216

1698

if interface_names:

1217

1699

# Replace the class with a new subclass of it with

1218

1700

# methods, signals, etc. as created above.

1219

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

1220

(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)

1221

1707

return cls

1708

1222

1709

return wrapper

1223

1710

1224

1711

1225

1712

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

1226

"se.bsnet.fukt.Mandos"})

1713

"se.bsnet.fukt.Mandos"})

1227

1714

class ClientDBus(Client, DBusObjectWithProperties):

1228

1715

"""A Client class using D-Bus

1229

1716

1230

1717

Attributes:

1231

1718

dbus_object_path: dbus.ObjectPath

1232

1719

bus: dbus.SystemBus()

1233

1720

"""

1234

1721

1235

1722

runtime_expansions = (Client.runtime_expansions

1236

+ ("dbus_object_path",))

1237

1723

+ ("dbus_object_path", ))

1724

1725

_interface = "se.recompile.Mandos.Client"

1726

1238

1727

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

1239

1240

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

1728

1729

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

1241

1730

self.bus = bus

1242

1731

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

1243

1732

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

1244

1733

# the D-Bus

1245

client_object_name = unicode(self.name).translate(

1734

client_object_name = str(self.name).translate(

1246

1735

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

1247

1736

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

1248

self.dbus_object_path = (dbus.ObjectPath

1249

("/clients/" + client_object_name))

1737

self.dbus_object_path = dbus.ObjectPath(

1738

"/clients/" + client_object_name)

1250

1739

DBusObjectWithProperties.__init__(self, self.bus,

1251

1740

self.dbus_object_path)

1252

1253

def notifychangeproperty(transform_func,

1254

dbus_name, type_func=lambda x: x,

1255

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):

1256

1747

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

1257

1748

its changes to DBus.

1258

1749

1259

1750

transform_fun: Function that takes a value and a variant_level

1260

1751

and transforms it to a D-Bus type.

1261

1752

dbus_name: D-Bus name of the variable

1263

1754

to the D-Bus. Default: no transform

1264

1755

variant_level: D-Bus variant level. Default: 1

1265

1756

"""

1266

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

1757

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

1758

1267

1759

def setter(self, value):

1268

1760

if hasattr(self, "dbus_object_path"):

1269

1761

if (not hasattr(self, attrname) or

1270

1762

type_func(getattr(self, attrname, None))

1271

1763

!= type_func(value)):

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1275

self.PropertyChanged(dbus.String(dbus_name),

1276

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())

1277

1779

setattr(self, attrname, value)

1278

1780

1279

1781

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

1280

1782

1281

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1282

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1283

1785

"ApprovalPending",

1284

type_func = bool)

1786

type_func=bool)

1285

1787

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

1286

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1287

1789

"LastEnabled")

1288

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

1289

type_func = lambda checker:

1290

checker is not None)

1790

checker = notifychangeproperty(

1791

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1291

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1292

1794

"LastCheckedOK")

1293

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1296

1798

datetime_to_dbus, "LastApprovalRequest")

1297

1799

approved_by_default = notifychangeproperty(dbus.Boolean,

1298

1800

"ApprovedByDefault")

1299

approval_delay = notifychangeproperty(dbus.UInt64,

1300

"ApprovalDelay",

1301

type_func =

1302

timedelta_to_milliseconds)

1801

approval_delay = notifychangeproperty(

1802

dbus.UInt64, "ApprovalDelay",

1803

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

1303

1804

approval_duration = notifychangeproperty(

1304

1805

dbus.UInt64, "ApprovalDuration",

1305

type_func = timedelta_to_milliseconds)

1806

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

1306

1807

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

1307

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

1308

type_func =

1309

timedelta_to_milliseconds)

1808

timeout = notifychangeproperty(

1809

dbus.UInt64, "Timeout",

1810

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

1310

1811

extended_timeout = notifychangeproperty(

1311

1812

dbus.UInt64, "ExtendedTimeout",

1312

type_func = timedelta_to_milliseconds)

1313

interval = notifychangeproperty(dbus.UInt64,

1314

"Interval",

1315

type_func =

1316

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)

1317

1817

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

1318

1818

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

1819

invalidate_only=True)

1820

1319

1821

del notifychangeproperty

1320

1822

1321

1823

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

1322

1824

try:

1323

1825

self.remove_from_connection()

1326

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1327

1829

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

1328

1830

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

1329

1330

def checker_callback(self, pid, condition, command,

1331

*args, **kwargs):

1332

self.checker_callback_tag = None

1333

self.checker = None

1334

if os.WIFEXITED(condition):

1335

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:

1336

1839

# Emit D-Bus signal

1337

1840

self.CheckerCompleted(dbus.Int16(exitstatus),

1338

dbus.Int64(condition),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1339

1843

dbus.String(command))

1340

1844

else:

1341

1845

# Emit D-Bus signal

1342

1846

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

1343

dbus.Int64(condition),

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1344

1851

dbus.String(command))

1345

1346

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

1347

*args, **kwargs)

1348

1852

return ret

1853

1349

1854

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

1350

old_checker = self.checker

1351

if self.checker is not None:

1352

old_checker_pid = self.checker.pid

1353

else:

1354

old_checker_pid = None

1855

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

1355

1856

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

1356

1857

# Only if new checker process was started

1357

1858

if (self.checker is not None

1359

1860

# Emit D-Bus signal

1360

1861

self.CheckerStarted(self.current_checker_command)

1361

1862

return r

1362

1863

1363

1864

def _reset_approved(self):

1364

1865

self.approved = None

1365

1866

return False

1366

1867

1367

1868

def approve(self, value=True):

1368

1869

self.approved = value

1369

gobject.timeout_add(timedelta_to_milliseconds

1370

(self.approval_duration),

1371

self._reset_approved)

1870

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

1871

* 1000), self._reset_approved)

1372

1872

self.send_changedstate()

1373

1374

## D-Bus methods, signals & properties

1375

_interface = "se.recompile.Mandos.Client"

1376

1377

## Interfaces

1378

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

1383

1384

## Signals

1385

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1386

1880

# CheckerCompleted - signal

1387

1881

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

1388

1882

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

1389

1883

"D-Bus signal"

1390

1884

pass

1391

1885

1392

1886

# CheckerStarted - signal

1393

1887

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

1394

1888

def CheckerStarted(self, command):

1395

1889

"D-Bus signal"

1396

1890

pass

1397

1891

1398

1892

# PropertyChanged - signal

1893

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

1399

1894

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

1400

1895

def PropertyChanged(self, property, value):

1401

1896

"D-Bus signal"

1402

1897

pass

1403

1898

1404

1899

# GotSecret - signal

1405

1900

@dbus.service.signal(_interface)

1406

1901

def GotSecret(self):

1409

1904

server to mandos-client

1410

1905

"""

1411

1906

pass

1412

1907

1413

1908

# Rejected - signal

1414

1909

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

1415

1910

def Rejected(self, reason):

1416

1911

"D-Bus signal"

1417

1912

pass

1418

1913

1419

1914

# NeedApproval - signal

1420

1915

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

1421

1916

def NeedApproval(self, timeout, default):

1422

1917

"D-Bus signal"

1423

1918

return self.need_approval()

1424

1425

## Methods

1426

1919

1920

# Methods

1921

1427

1922

# Approve - method

1428

1923

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

1429

1924

def Approve(self, value):

1430

1925

self.approve(value)

1431

1926

1432

1927

# CheckedOK - method

1433

1928

@dbus.service.method(_interface)

1434

1929

def CheckedOK(self):

1435

1930

self.checked_ok()

1436

1931

1437

1932

# Enable - method

1933

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

1438

1934

@dbus.service.method(_interface)

1439

1935

def Enable(self):

1440

1936

"D-Bus method"

1441

1937

self.enable()

1442

1938

1443

1939

# StartChecker - method

1940

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

1444

1941

@dbus.service.method(_interface)

1445

1942

def StartChecker(self):

1446

1943

"D-Bus method"

1447

1944

self.start_checker()

1448

1945

1449

1946

# Disable - method

1947

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

1450

1948

@dbus.service.method(_interface)

1451

1949

def Disable(self):

1452

1950

"D-Bus method"

1453

1951

self.disable()

1454

1952

1455

1953

# StopChecker - method

1954

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

1456

1955

@dbus.service.method(_interface)

1457

1956

def StopChecker(self):

1458

1957

self.stop_checker()

1459

1460

## Properties

1461

1958

1959

# Properties

1960

1462

1961

# ApprovalPending - property

1463

1962

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

1464

1963

def ApprovalPending_dbus_property(self):

1465

1964

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

1466

1965

1467

1966

# ApprovedByDefault - property

1468

@dbus_service_property(_interface, signature="b",

1967

@dbus_service_property(_interface,

1968

signature="b",

1469

1969

access="readwrite")

1470

1970

def ApprovedByDefault_dbus_property(self, value=None):

1471

1971

if value is None: # get

1472

1972

return dbus.Boolean(self.approved_by_default)

1473

1973

self.approved_by_default = bool(value)

1474

1974

1475

1975

# ApprovalDelay - property

1476

@dbus_service_property(_interface, signature="t",

1976

@dbus_service_property(_interface,

1977

signature="t",

1477

1978

access="readwrite")

1478

1979

def ApprovalDelay_dbus_property(self, value=None):

1479

1980

if value is None: # get

1480

return dbus.UInt64(self.approval_delay_milliseconds())

1981

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

1982

* 1000)

1481

1983

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

1482

1984

1483

1985

# ApprovalDuration - property

1484

@dbus_service_property(_interface, signature="t",

1986

@dbus_service_property(_interface,

1987

signature="t",

1485

1988

access="readwrite")

1486

1989

def ApprovalDuration_dbus_property(self, value=None):

1487

1990

if value is None: # get

1488

return dbus.UInt64(timedelta_to_milliseconds(

1489

self.approval_duration))

1991

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

1992

* 1000)

1490

1993

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

1491

1994

1492

1995

# Name - property

1996

@dbus_annotations(

1997

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

1493

1998

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

1494

1999

def Name_dbus_property(self):

1495

2000

return dbus.String(self.name)

1496

2001

1497

2002

# Fingerprint - property

2003

@dbus_annotations(

2004

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

1498

2005

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

1499

2006

def Fingerprint_dbus_property(self):

1500

2007

return dbus.String(self.fingerprint)

1501

2008

1502

2009

# Host - property

1503

@dbus_service_property(_interface, signature="s",

2010

@dbus_service_property(_interface,

2011

signature="s",

1504

2012

access="readwrite")

1505

2013

def Host_dbus_property(self, value=None):

1506

2014

if value is None: # get

1507

2015

return dbus.String(self.host)

1508

self.host = unicode(value)

1509

2016

self.host = str(value)

2017

1510

2018

# Created - property

2019

@dbus_annotations(

2020

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

1511

2021

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

1512

2022

def Created_dbus_property(self):

1513

2023

return datetime_to_dbus(self.created)

1514

2024

1515

2025

# LastEnabled - property

1516

2026

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

1517

2027

def LastEnabled_dbus_property(self):

1518

2028

return datetime_to_dbus(self.last_enabled)

1519

2029

1520

2030

# Enabled - property

1521

@dbus_service_property(_interface, signature="b",

2031

@dbus_service_property(_interface,

2032

signature="b",

1522

2033

access="readwrite")

1523

2034

def Enabled_dbus_property(self, value=None):

1524

2035

if value is None: # get

1527

2038

self.enable()

1528

2039

else:

1529

2040

self.disable()

1530

2041

1531

2042

# LastCheckedOK - property

1532

@dbus_service_property(_interface, signature="s",

2043

@dbus_service_property(_interface,

2044

signature="s",

1533

2045

access="readwrite")

1534

2046

def LastCheckedOK_dbus_property(self, value=None):

1535

2047

if value is not None:

1536

2048

self.checked_ok()

1537

2049

return

1538

2050

return datetime_to_dbus(self.last_checked_ok)

1539

2051

1540

2052

# LastCheckerStatus - property

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

2053

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

1543

2054

def LastCheckerStatus_dbus_property(self):

1544

2055

return dbus.Int16(self.last_checker_status)

1545

2056

1546

2057

# Expires - property

1547

2058

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

1548

2059

def Expires_dbus_property(self):

1549

2060

return datetime_to_dbus(self.expires)

1550

2061

1551

2062

# LastApprovalRequest - property

1552

2063

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

1553

2064

def LastApprovalRequest_dbus_property(self):

1554

2065

return datetime_to_dbus(self.last_approval_request)

1555

2066

1556

2067

# Timeout - property

1557

@dbus_service_property(_interface, signature="t",

2068

@dbus_service_property(_interface,

2069

signature="t",

1558

2070

access="readwrite")

1559

2071

def Timeout_dbus_property(self, value=None):

1560

2072

if value is None: # get

1561

return dbus.UInt64(self.timeout_milliseconds())

2073

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

1562

2074

old_timeout = self.timeout

1563

2075

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

1564

2076

# Reschedule disabling

1572

2084

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

1573

2085

is None):

1574

2086

return

1575

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1580

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

1581

2092

# ExtendedTimeout - property

1582

@dbus_service_property(_interface, signature="t",

2093

@dbus_service_property(_interface,

2094

signature="t",

1583

2095

access="readwrite")

1584

2096

def ExtendedTimeout_dbus_property(self, value=None):

1585

2097

if value is None: # get

1586

return dbus.UInt64(self.extended_timeout_milliseconds())

2098

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

2099

* 1000)

1587

2100

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

1588

2101

1589

2102

# Interval - property

1590

@dbus_service_property(_interface, signature="t",

2103

@dbus_service_property(_interface,

2104

signature="t",

1591

2105

access="readwrite")

1592

2106

def Interval_dbus_property(self, value=None):

1593

2107

if value is None: # get

1594

return dbus.UInt64(self.interval_milliseconds())

2108

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

1595

2109

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

1596

2110

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

1597

2111

return

1598

2112

if self.enabled:

1599

2113

# Reschedule checker run

1600

gobject.source_remove(self.checker_initiator_tag)

1601

self.checker_initiator_tag = (gobject.timeout_add

1602

(value, self.start_checker))

1603

self.start_checker() # Start one now, too

1604

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

1605

2119

# Checker - property

1606

@dbus_service_property(_interface, signature="s",

2120

@dbus_service_property(_interface,

2121

signature="s",

1607

2122

access="readwrite")

1608

2123

def Checker_dbus_property(self, value=None):

1609

2124

if value is None: # get

1610

2125

return dbus.String(self.checker_command)

1611

self.checker_command = unicode(value)

1612

2126

self.checker_command = str(value)

2127

1613

2128

# CheckerRunning - property

1614

@dbus_service_property(_interface, signature="b",

2129

@dbus_service_property(_interface,

2130

signature="b",

1615

2131

access="readwrite")

1616

2132

def CheckerRunning_dbus_property(self, value=None):

1617

2133

if value is None: # get

1620

2136

self.start_checker()

1621

2137

else:

1622

2138

self.stop_checker()

1623

2139

1624

2140

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

1625

2144

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

1626

2145

def ObjectPath_dbus_property(self):

1627

return self.dbus_object_path # is already a dbus.ObjectPath

1628

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1629

2148

# Secret = property

1630

@dbus_service_property(_interface, signature="ay",

1631

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)

1632

2156

def Secret_dbus_property(self, value):

1633

self.secret = str(value)

1634

2157

self.secret = bytes(value)

2158

1635

2159

del _interface

1636

2160

1637

2161

1640

2164

self._pipe = child_pipe

1641

2165

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

1642

2166

if not self._pipe.recv():

1643

raise KeyError()

1644

2167

raise KeyError(fpr)

2168

1645

2169

def __getattribute__(self, name):

1646

2170

if name == '_pipe':

1647

2171

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

1650

2174

if data[0] == 'data':

1651

2175

return data[1]

1652

2176

if data[0] == 'function':

2177

1653

2178

def func(*args, **kwargs):

1654

2179

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

1655

2180

return self._pipe.recv()[1]

2181

1656

2182

return func

1657

2183

1658

2184

def __setattr__(self, name, value):

1659

2185

if name == '_pipe':

1660

2186

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

1663

2189

1664

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1665

2191

"""A class to handle client connections.

1666

2192

1667

2193

Instantiated once for each connection to handle it.

1668

2194

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

1669

2195

1670

2196

def handle(self):

1671

2197

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

1672

2198

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

1673

unicode(self.client_address))

2199

str(self.client_address))

1674

2200

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

1675

2201

self.server.child_pipe.fileno())

1676

1677

session = (gnutls.connection

1678

.ClientSession(self.request,

1679

gnutls.connection

1680

.X509Credentials()))

1681

1682

# Note: gnutls.connection.X509Credentials is really a

1683

# generic GnuTLS certificate credentials object so long as

1684

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

1685

# here despite using OpenPGP certificates.

1686

1687

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

1688

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

1689

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

1690

# "+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"))

1691

2209

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

1692

2210

priority = self.server.gnutls_priority

1693

2211

if priority is None:

1694

2212

priority = "NORMAL"

1695

(gnutls.library.functions

1696

.gnutls_priority_set_direct(session._c_object,

1697

priority, None))

1698

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1699

2217

# Start communication using the Mandos protocol

1700

2218

# Get protocol number

1701

2219

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

1702

2220

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

1703

2221

try:

1704

2222

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

1705

raise RuntimeError

2223

raise RuntimeError(line)

1706

2224

except (ValueError, IndexError, RuntimeError) as error:

1707

2225

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

1708

2226

return

1709

2227

1710

2228

# Start GnuTLS connection

1711

2229

try:

1712

2230

session.handshake()

1713

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1714

2232

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

1715

2233

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

1716

2234

# established. Just abandon the request.

1717

2235

return

1718

2236

logger.debug("Handshake succeeded")

1719

2237

1720

2238

approval_required = False

1721

2239

try:

1722

2240

try:

1723

fpr = self.fingerprint(self.peer_certificate

1724

(session))

1725

except (TypeError,

1726

gnutls.errors.GNUTLSError) as error:

2241

fpr = self.fingerprint(

2242

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1727

2244

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

1728

2245

return

1729

2246

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

1730

2247

1731

2248

try:

1732

2249

client = ProxyClient(child_pipe, fpr,

1733

2250

self.client_address)

1734

2251

except KeyError:

1735

2252

return

1736

2253

1737

2254

if client.approval_delay:

1738

2255

delay = client.approval_delay

1739

2256

client.approvals_pending += 1

1740

2257

approval_required = True

1741

2258

1742

2259

while True:

1743

2260

if not client.enabled:

1744

2261

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

1745

client.name)

2262

client.name)

1746

2263

if self.server.use_dbus:

1747

2264

# Emit D-Bus signal

1748

2265

client.Rejected("Disabled")

1749

2266

return

1750

2267

1751

2268

if client.approved or not client.approval_delay:

1752

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1753

2270

break

1754

2271

elif client.approved is None:

1755

2272

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

1757

2274

if self.server.use_dbus:

1758

2275

# Emit D-Bus signal

1759

2276

client.NeedApproval(

1760

client.approval_delay_milliseconds(),

1761

client.approved_by_default)

2277

client.approval_delay.total_seconds()

2278

* 1000, client.approved_by_default)

1762

2279

else:

1763

2280

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

1764

2281

client.name)

1766

2283

# Emit D-Bus signal

1767

2284

client.Rejected("Denied")

1768

2285

return

1769

1770

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1771

2288

time = datetime.datetime.now()

1772

2289

client.changedstate.acquire()

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

2290

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

1776

2291

client.changedstate.release()

1777

2292

time2 = datetime.datetime.now()

1778

2293

if (time2 - time) >= delay:

1788

2303

break

1789

2304

else:

1790

2305

delay -= time2 - time

1791

1792

sent_size = 0

1793

while sent_size < len(client.secret):

1794

try:

1795

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

1796

except gnutls.errors.GNUTLSError as error:

1797

logger.warning("gnutls send failed",

1798

exc_info=error)

1799

return

1800

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

1801

sent, len(client.secret)

1802

- (sent_size + sent))

1803

sent_size += sent

1804

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

1805

2314

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

1806

2315

# bump the timeout using extended_timeout

1807

2316

client.bump_timeout(client.extended_timeout)

1808

2317

if self.server.use_dbus:

1809

2318

# Emit D-Bus signal

1810

2319

client.GotSecret()

1811

2320

1812

2321

finally:

1813

2322

if approval_required:

1814

2323

client.approvals_pending -= 1

1815

2324

try:

1816

2325

session.bye()

1817

except gnutls.errors.GNUTLSError as error:

2326

except gnutls.Error as error:

1818

2327

logger.warning("GnuTLS bye failed",

1819

2328

exc_info=error)

1820

2329

1821

2330

@staticmethod

1822

2331

def peer_certificate(session):

1823

2332

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

1824

2333

# If not an OpenPGP certificate...

1825

if (gnutls.library.functions

1826

.gnutls_certificate_type_get(session._c_object)

1827

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1828

# ...do the normal thing

1829

return session.peer_certificate

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1830

2338

list_size = ctypes.c_uint(1)

1831

cert_list = (gnutls.library.functions

1832

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

1833

2340

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

1834

2341

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

1835

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

1836

" certificate")

2342

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

1837

2343

if list_size.value == 0:

1838

2344

return None

1839

2345

cert = cert_list[0]

1840

2346

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

1841

2347

1842

2348

@staticmethod

1843

2349

def fingerprint(openpgp):

1844

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1845

2351

# New GnuTLS "datum" with the OpenPGP public key

1846

datum = (gnutls.library.types

1847

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

1848

ctypes.POINTER

1849

(ctypes.c_ubyte)),

1850

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)))

1851

2356

# New empty GnuTLS certificate

1852

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1853

(gnutls.library.functions

1854

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1855

2359

# Import the OpenPGP public key into the certificate

1856

(gnutls.library.functions

1857

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

1858

gnutls.library.constants

1859

.GNUTLS_OPENPGP_FMT_RAW))

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1860

2362

# Verify the self signature in the key

1861

2363

crtverify = ctypes.c_uint()

1862

(gnutls.library.functions

1863

.gnutls_openpgp_crt_verify_self(crt, 0,

1864

ctypes.byref(crtverify)))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1865

2366

if crtverify.value != 0:

1866

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1867

raise (gnutls.errors.CertificateSecurityError

1868

("Verify failed"))

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError("Verify failed")

1869

2369

# New buffer for the fingerprint

1870

2370

buf = ctypes.create_string_buffer(20)

1871

2371

buf_len = ctypes.c_size_t()

1872

2372

# Get the fingerprint from the certificate into the buffer

1873

(gnutls.library.functions

1874

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

1875

ctypes.byref(buf_len)))

2373

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

2374

ctypes.byref(buf_len))

1876

2375

# Deinit the certificate

1877

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2376

gnutls.openpgp_crt_deinit(crt)

1878

2377

# Convert the buffer to a Python bytestring

1879

2378

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

1880

2379

# Convert the bytestring to hexadecimal notation

1884

2383

1885

2384

class MultiprocessingMixIn(object):

1886

2385

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

2386

1887

2387

def sub_process_main(self, request, address):

1888

2388

try:

1889

2389

self.finish_request(request, address)

1890

2390

except Exception:

1891

2391

self.handle_error(request, address)

1892

2392

self.close_request(request)

1893

2393

1894

2394

def process_request(self, request, address):

1895

2395

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

1896

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

1897

args = (request, address))

2396

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

2397

args=(request, address))

1898

2398

proc.start()

1899

2399

return proc

1900

2400

1901

2401

1902

2402

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1903

2403

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

2404

1904

2405

def process_request(self, request, client_address):

1905

2406

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

1906

2407

1907

2408

This function creates a new pipe in self.pipe

1908

2409

"""

1909

2410

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1910

2411

1911

2412

proc = MultiprocessingMixIn.process_request(self, request,

1912

2413

client_address)

1913

2414

self.child_pipe.close()

1914

2415

self.add_pipe(parent_pipe, proc)

1915

2416

1916

2417

def add_pipe(self, parent_pipe, proc):

1917

2418

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

1918

raise NotImplementedError

2419

raise NotImplementedError()

1919

2420

1920

2421

1921

2422

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1922

2423

socketserver.TCPServer, object):

1923

2424

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

1924

2425

1925

2426

Attributes:

1926

2427

enabled: Boolean; whether this server is activated yet

1927

2428

interface: None or a network interface name (string)

1928

2429

use_ipv6: Boolean; to use IPv6 or not

1929

2430

"""

2431

1930

2432

def __init__(self, server_address, RequestHandlerClass,

1931

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

2433

interface=None,

2434

use_ipv6=True,

2435

socketfd=None):

1932

2436

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

1933

2437

creating a new one with socket.socket().

1934

2438

"""

1940

2444

self.socketfd = socketfd

1941

2445

# Save the original socket.socket() function

1942

2446

self.socket_socket = socket.socket

2447

1943

2448

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

1944

#

2449

#

1945

2450

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

1946

2451

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

1947

2452

# patching socket.socket.)

1948

#

2453

#

1949

2454

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

1950

2455

@functools.wraps(socket.socket)

1951

2456

def socket_wrapper(*args, **kwargs):

1963

2468

# socket_wrapper(), if socketfd was set.

1964

2469

socketserver.TCPServer.__init__(self, server_address,

1965

2470

RequestHandlerClass)

1966

2471

1967

2472

def server_bind(self):

1968

2473

"""This overrides the normal server_bind() function

1969

2474

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

1970

2475

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

2476

global SO_BINDTODEVICE

1971

2477

if self.interface is not None:

1972

2478

if SO_BINDTODEVICE is None:

1973

logger.error("SO_BINDTODEVICE does not exist;"

1974

" cannot bind to interface %s",

1975

self.interface)

1976

else:

1977

try:

1978

self.socket.setsockopt(socket.SOL_SOCKET,

1979

SO_BINDTODEVICE,

1980

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

1981

except socket.error as error:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1986

logger.error("SO_BINDTODEVICE not available;"

1987

" cannot bind to interface %s",

1988

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

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

1991

" cannot bind", self.interface)

1992

else:

1993

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

1994

2500

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

1995

2501

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

1996

2502

if not self.server_address[0]:

1997

2503

if self.address_family == socket.AF_INET6:

1998

any_address = "::" # in6addr_any

2504

any_address = "::" # in6addr_any

1999

2505

else:

2000

any_address = "0.0.0.0" # INADDR_ANY

2506

any_address = "0.0.0.0" # INADDR_ANY

2001

2507

self.server_address = (any_address,

2002

2508

self.server_address[1])

2003

2509

elif not self.server_address[1]:

2004

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

2005

0)

2510

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

2006

2511

# if self.interface:

2007

2512

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

2008

2513

# 0, # port

2014

2519

2015

2520

class MandosServer(IPv6_TCPServer):

2016

2521

"""Mandos server.

2017

2522

2018

2523

Attributes:

2019

2524

clients: set of Client objects

2020

2525

gnutls_priority GnuTLS priority string

2021

2526

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

2022

2023

Assumes a gobject.MainLoop event loop.

2527

2528

Assumes a GLib.MainLoop event loop.

2024

2529

"""

2530

2025

2531

def __init__(self, server_address, RequestHandlerClass,

2026

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

2027

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):

2028

2538

self.enabled = False

2029

2539

self.clients = clients

2030

2540

if self.clients is None:

2033

2543

self.gnutls_priority = gnutls_priority

2034

2544

IPv6_TCPServer.__init__(self, server_address,

2035

2545

RequestHandlerClass,

2036

interface = interface,

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

2546

interface=interface,

2547

use_ipv6=use_ipv6,

2548

socketfd=socketfd)

2549

2039

2550

def server_activate(self):

2040

2551

if self.enabled:

2041

2552

return socketserver.TCPServer.server_activate(self)

2042

2553

2043

2554

def enable(self):

2044

2555

self.enabled = True

2045

2556

2046

2557

def add_pipe(self, parent_pipe, proc):

2047

2558

# Call "handle_ipc" for both data and EOF events

2048

gobject.io_add_watch(parent_pipe.fileno(),

2049

gobject.IO_IN | gobject.IO_HUP,

2050

functools.partial(self.handle_ipc,

2051

parent_pipe =

2052

parent_pipe,

2053

proc = proc))

2054

2055

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

2056

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):

2057

2570

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

2058

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

2571

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

2059

2572

# Wait for other process to exit

2060

2573

proc.join()

2061

2574

return False

2062

2575

2063

2576

# Read a request from the child

2064

2577

request = parent_pipe.recv()

2065

2578

command = request[0]

2066

2579

2067

2580

if command == 'init':

2068

2581

fpr = request[1]

2069

2582

address = request[2]

2070

2071

for c in self.clients.itervalues():

2583

2584

for c in self.clients.values():

2072

2585

if c.fingerprint == fpr:

2073

2586

client = c

2074

2587

break

2081

2594

address[0])

2082

2595

parent_pipe.send(False)

2083

2596

return False

2084

2085

gobject.io_add_watch(parent_pipe.fileno(),

2086

gobject.IO_IN | gobject.IO_HUP,

2087

functools.partial(self.handle_ipc,

2088

parent_pipe =

2089

parent_pipe,

2090

proc = proc,

2091

client_object =

2092

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))

2093

2605

parent_pipe.send(True)

2094

2606

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

2095

2607

# same fileno

2098

2610

funcname = request[1]

2099

2611

args = request[2]

2100

2612

kwargs = request[3]

2101

2613

2102

2614

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

2103

2615

funcname)(*args,

2104

**kwargs)))

2105

2616

**kwargs)))

2617

2106

2618

if command == 'getattr':

2107

2619

attrname = request[1]

2108

if callable(client_object.__getattribute__(attrname)):

2109

parent_pipe.send(('function',))

2620

if isinstance(client_object.__getattribute__(attrname),

2621

collections.Callable):

2622

parent_pipe.send(('function', ))

2110

2623

else:

2111

parent_pipe.send(('data', client_object

2112

.__getattribute__(attrname)))

2113

2624

parent_pipe.send((

2625

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

2626

2114

2627

if command == 'setattr':

2115

2628

attrname = request[1]

2116

2629

value = request[2]

2117

2630

setattr(client_object, attrname, value)

2118

2631

2119

2632

return True

2120

2633

2121

2634

2122

2635

def rfc3339_duration_to_delta(duration):

2123

2636

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

2124

2637

2125

2638

>>> rfc3339_duration_to_delta("P7D")

2126

2639

datetime.timedelta(7)

2127

2640

>>> rfc3339_duration_to_delta("PT60S")

2137

2650

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

2651

datetime.timedelta(1, 200)

2139

2652

"""

2140

2653

2141

2654

# Parsing an RFC 3339 duration with regular expressions is not

2142

2655

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

2143

2656

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

2144

2657

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

2145

2658

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

2146

2659

# avoid excessive use of external libraries.

2147

2660

2148

2661

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

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# 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

2158

2667

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

2159

2668

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

2160

2669

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

2161

2670

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

2162

2671

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2672

frozenset((token_end, )))

2164

2673

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

2165

2674

datetime.timedelta(minutes=1),

2166

2675

frozenset((token_second, token_end)))

2182

2691

frozenset((token_month, token_end)))

2183

2692

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

2184

2693

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2694

frozenset((token_end, )))

2186

2695

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

2187

2696

frozenset((token_year, token_month,

2188

2697

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2698

token_week)))

2699

# Define starting values:

2700

# Value so far

2701

value = datetime.timedelta()

2192

2702

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2703

# Following valid tokens

2704

followers = frozenset((token_duration, ))

2705

# String left to parse

2706

s = duration

2195

2707

# Loop until end token is found

2196

2708

while found_token is not token_end:

2197

2709

# Search for any currently valid tokens

2213

2725

break

2214

2726

else:

2215

2727

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2728

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

2729

.format(duration))

2217

2730

# End token found

2218

2731

return value

2219

2732

2220

2733

2221

2734

def string_to_delta(interval):

2222

2735

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

2223

2736

2224

2737

>>> string_to_delta('7d')

2225

2738

datetime.timedelta(7)

2226

2739

>>> string_to_delta('60s')

2234

2747

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

2235

2748

datetime.timedelta(0, 330)

2236

2749

"""

2237

2750

2238

2751

try:

2239

2752

return rfc3339_duration_to_delta(interval)

2240

2753

except ValueError:

2241

2754

pass

2242

2755

2243

2756

timevalue = datetime.timedelta(0)

2244

2757

for s in interval.split():

2245

2758

try:

2246

suffix = unicode(s[-1])

2759

suffix = s[-1]

2247

2760

value = int(s[:-1])

2248

2761

if suffix == "d":

2249

2762

delta = datetime.timedelta(value)

2256

2769

elif suffix == "w":

2257

2770

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

2258

2771

else:

2259

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

2260

.format(suffix))

2261

except (ValueError, IndexError) as e:

2772

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

2773

except IndexError as e:

2262

2774

raise ValueError(*(e.args))

2263

2775

timevalue += delta

2264

2776

return timevalue

2265

2777

2266

2778

2267

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

2779

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

2268

2780

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

2269

2781

2270

2782

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

2271

2783

if os.fork():

2272

2784

sys.exit()

2280

2792

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

2281

2793

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

2282

2794

raise OSError(errno.ENODEV,

2283

"{0} not a character device"

2795

"{} not a character device"

2284

2796

.format(os.devnull))

2285

2797

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

2286

2798

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

2290

2802

2291

2803

2292

2804

def main():

2293

2805

2294

2806

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

2295

2807

# Parsing of options, both command line and config file

2296

2808

2297

2809

parser = argparse.ArgumentParser()

2298

2810

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

2299

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

2811

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

2300

2812

help="show version number and exit")

2301

2813

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

2302

2814

help="Bind to interface IF")

2335

2847

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

2336

2848

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

2337

2849

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

2338

2850

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

2851

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

2852

default=None)

2853

2339

2854

options = parser.parse_args()

2340

2855

2341

2856

if options.check:

2342

2857

import doctest

2343

doctest.testmod()

2344

sys.exit()

2345

2858

fail_count, test_count = doctest.testmod()

2859

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

2860

2346

2861

# Default values for config file for server-global settings

2347

server_defaults = { "interface": "",

2348

"address": "",

2349

"port": "",

2350

"debug": "False",

2351

"priority":

2352

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

2353

"servicename": "Mandos",

2354

"use_dbus": "True",

2355

"use_ipv6": "True",

2356

"debuglevel": "",

2357

"restore": "True",

2358

"socket": "",

2359

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

2360

"foreground": "False",

2361

}

2362

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

2363

2880

# Parse config file for server-global settings

2364

2881

server_config = configparser.SafeConfigParser(server_defaults)

2365

2882

del server_defaults

2366

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

2367

"mandos.conf"))

2883

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

2368

2884

# Convert the SafeConfigParser object to a dict

2369

2885

server_settings = server_config.defaults()

2370

2886

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

2371

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

2887

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

2888

"foreground", "zeroconf"):

2372

2889

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

2373

2890

option)

2374

2891

if server_settings["port"]:

2384

2901

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

2385

2902

["socket"])

2386

2903

del server_config

2387

2904

2388

2905

# Override the settings from the config file with command line

2389

2906

# options, if set.

2390

2907

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

2391

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

2392

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

2393

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

2908

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

2909

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

2910

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

2394

2911

value = getattr(options, option)

2395

2912

if value is not None:

2396

2913

server_settings[option] = value

2397

2914

del options

2398

2915

# Force all strings to be unicode

2399

2916

for option in server_settings.keys():

2400

if type(server_settings[option]) is str:

2401

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"))

2402

2920

# Force all boolean options to be boolean

2403

2921

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

2404

"foreground"):

2922

"foreground", "zeroconf"):

2405

2923

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

2406

2924

# Debug implies foreground

2407

2925

if server_settings["debug"]:

2408

2926

server_settings["foreground"] = True

2409

2927

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

2410

2928

2411

2929

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

2412

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

2413

2936

# For convenience

2414

2937

debug = server_settings["debug"]

2415

2938

debuglevel = server_settings["debuglevel"]

2418

2941

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

2419

2942

stored_state_file)

2420

2943

foreground = server_settings["foreground"]

2421

2944

zeroconf = server_settings["zeroconf"]

2945

2422

2946

if debug:

2423

2947

initlogger(debug, logging.DEBUG)

2424

2948

else:

2427

2951

else:

2428

2952

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

2429

2953

initlogger(debug, level)

2430

2954

2431

2955

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

2432

syslogger.setFormatter(logging.Formatter

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

2437

2956

syslogger.setFormatter(

2957

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

2958

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

2959

server_settings["servicename"])))

2960

2438

2961

# Parse config file with clients

2439

2962

client_config = configparser.SafeConfigParser(Client

2440

2963

.client_defaults)

2441

2964

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

2442

2965

"clients.conf"))

2443

2966

2444

2967

global mandos_dbus_service

2445

2968

mandos_dbus_service = None

2446

2447

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

2448

server_settings["port"]),

2449

ClientHandler,

2450

interface=(server_settings["interface"]

2451

or None),

2452

use_ipv6=use_ipv6,

2453

gnutls_priority=

2454

server_settings["priority"],

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

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)

2458

2981

if not foreground:

2459

2982

pidfilename = "/run/mandos.pid"

2460

2983

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

2461

2984

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

2462

2985

pidfile = None

2463

2986

try:

2464

pidfile = open(pidfilename, "w")

2987

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

2465

2988

except IOError as e:

2466

2989

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

2467

2990

exc_info=e)

2468

2469

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

2991

2992

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

2993

("mandos", "mandos"),

2994

("nobody", "nogroup")):

2470

2995

try:

2471

2996

uid = pwd.getpwnam(name).pw_uid

2472

gid = pwd.getpwnam(name).pw_gid

2997

gid = pwd.getpwnam(group).pw_gid

2473

2998

break

2474

2999

except KeyError:

2475

3000

continue

2479

3004

try:

2480

3005

os.setgid(gid)

2481

3006

os.setuid(uid)

3007

if debug:

3008

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

3009

gid))

2482

3010

except OSError as error:

3011

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

3012

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

2483

3013

if error.errno != errno.EPERM:

2484

raise error

2485

3014

raise

3015

2486

3016

if debug:

2487

3017

# Enable all possible GnuTLS debugging

2488

3018

2489

3019

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

2490

3020

# - GnuTLS manual

2491

gnutls.library.functions.gnutls_global_set_log_level(11)

2492

2493

@gnutls.library.types.gnutls_log_func

3021

gnutls.global_set_log_level(11)

3022

3023

@gnutls.log_func

2494

3024

def debug_gnutls(level, string):

2495

3025

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

2496

2497

(gnutls.library.functions

2498

.gnutls_global_set_log_function(debug_gnutls))

2499

3026

3027

gnutls.global_set_log_function(debug_gnutls)

3028

2500

3029

# Redirect stdin so all checkers get /dev/null

2501

3030

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

2502

3031

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

2503

3032

if null > 2:

2504

3033

os.close(null)

2505

3034

2506

3035

# Need to fork before connecting to D-Bus

2507

3036

if not foreground:

2508

3037

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

2509

3038

daemon()

2510

2511

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

2512

# need to inform gobject that threads will be used.

2513

gobject.threads_init()

2514

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

2515

3044

global main_loop

2516

3045

# From the Avahi example code

2517

3046

DBusGMainLoop(set_as_default=True)

2518

main_loop = gobject.MainLoop()

3047

main_loop = GLib.MainLoop()

2519

3048

bus = dbus.SystemBus()

2520

3049

# End of Avahi example code

2521

3050

if use_dbus:

2522

3051

try:

2523

3052

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

2524

bus, do_not_queue=True)

2525

old_bus_name = (dbus.service.BusName

2526

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

2527

do_not_queue=True))

2528

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:

2529

3059

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

2530

3060

use_dbus = False

2531

3061

server_settings["use_dbus"] = False

2532

3062

tcp_server.use_dbus = False

2533

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2534

service = AvahiServiceToSyslog(name =

2535

server_settings["servicename"],

2536

servicetype = "_mandos._tcp",

2537

protocol = protocol, bus = bus)

2538

if server_settings["interface"]:

2539

service.interface = (if_nametoindex

2540

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

2541

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

2542

3074

global multiprocessing_manager

2543

3075

multiprocessing_manager = multiprocessing.Manager()

2544

3076

2545

3077

client_class = Client

2546

3078

if use_dbus:

2547

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

2548

3079

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

3080

2549

3081

client_settings = Client.config_parser(client_config)

2550

3082

old_client_settings = {}

2551

3083

clients_data = {}

2552

3084

2553

3085

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

2554

3086

global wnull

2555

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

3087

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

2556

3088

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

2557

3089

# mode

2558

3090

if debug or not foreground:

2559

3091

wnull.close()

2560

3092

2561

3093

# Get client data and settings from last running state.

2562

3094

if server_settings["restore"]:

2563

3095

try:

2564

3096

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

2565

clients_data, old_client_settings = (pickle.load

2566

(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"))

2567

3142

os.remove(stored_state_path)

2568

3143

except IOError as e:

2569

3144

if e.errno == errno.ENOENT:

2570

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

2571

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

3145

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

3146

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

2572

3147

else:

2573

3148

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

2574

3149

exc_info=e)

2575

3150

raise

2576

3151

except EOFError as e:

2577

3152

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

2578

"EOFError:", exc_info=e)

2579

3153

"EOFError:",

3154

exc_info=e)

3155

2580

3156

with PGPEngine() as pgp:

2581

for client_name, client in clients_data.iteritems():

3157

for client_name, client in clients_data.items():

2582

3158

# Skip removed clients

2583

3159

if client_name not in client_settings:

2584

3160

continue

2585

3161

2586

3162

# Decide which value to use after restoring saved state.

2587

3163

# We have three different values: Old config file,

2588

3164

# new config file, and saved state.

2593

3169

# For each value in new config, check if it

2594

3170

# differs from the old config value (Except for

2595

3171

# the "secret" attribute)

2596

if (name != "secret" and

2597

value != old_client_settings[client_name]

2598

[name]):

3172

if (name != "secret"

3173

and (value !=

3174

old_client_settings[client_name][name])):

2599

3175

client[name] = value

2600

3176

except KeyError:

2601

3177

pass

2602

3178

2603

3179

# Clients who has passed its expire date can still be

2604

# enabled if its last checker was successful. Clients

3180

# enabled if its last checker was successful. A Client

2605

3181

# whose checker succeeded before we stored its state is

2606

3182

# assumed to have successfully run all checkers during

2607

3183

# downtime.

2609

3185

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

2610

3186

if not client["last_checked_ok"]:

2611

3187

logger.warning(

2612

"disabling client {0} - Client never "

2613

"performed a successful checker"

2614

.format(client_name))

3188

"disabling client {} - Client never "

3189

"performed a successful checker".format(

3190

client_name))

2615

3191

client["enabled"] = False

2616

3192

elif client["last_checker_status"] != 0:

2617

3193

logger.warning(

2618

"disabling client {0} - Client "

2619

"last checker failed with error code {1}"

2620

.format(client_name,

2621

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"]))

2622

3199

client["enabled"] = False

2623

3200

else:

2624

client["expires"] = (datetime.datetime

2625

.utcnow()

2626

+ client["timeout"])

3201

client["expires"] = (

3202

datetime.datetime.utcnow()

3203

+ client["timeout"])

2627

3204

logger.debug("Last checker succeeded,"

2628

" keeping {0} enabled"

2629

.format(client_name))

3205

" keeping {} enabled".format(

3206

client_name))

2630

3207

try:

2631

client["secret"] = (

2632

pgp.decrypt(client["encrypted_secret"],

2633

client_settings[client_name]

2634

["secret"]))

3208

client["secret"] = pgp.decrypt(

3209

client["encrypted_secret"],

3210

client_settings[client_name]["secret"])

2635

3211

except PGPError:

2636

3212

# If decryption fails, we use secret from new settings

2637

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

2638

.format(client_name))

2639

client["secret"] = (

2640

client_settings[client_name]["secret"])

2641

3213

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

3214

client_name))

3215

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

3216

["secret"])

3217

2642

3218

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

2643

3219

for client_name in (set(old_client_settings)

2644

3220

- set(client_settings)):

2646

3222

for client_name in (set(client_settings)

2647

3223

- set(old_client_settings)):

2648

3224

clients_data[client_name] = client_settings[client_name]

2649

3225

2650

3226

# Create all client objects

2651

for client_name, client in clients_data.iteritems():

3227

for client_name, client in clients_data.items():

2652

3228

tcp_server.clients[client_name] = client_class(

2653

name = client_name, settings = client,

2654

server_settings = server_settings)

2655

3229

name=client_name,

3230

settings=client,

3231

server_settings=server_settings)

3232

2656

3233

if not tcp_server.clients:

2657

3234

logger.warning("No clients defined")

2658

3235

2659

3236

if not foreground:

2660

3237

if pidfile is not None:

3238

pid = os.getpid()

2661

3239

try:

2662

3240

with pidfile:

2663

pid = os.getpid()

2664

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

3241

print(pid, file=pidfile)

2665

3242

except IOError:

2666

3243

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

2667

3244

pidfilename, pid)

2668

3245

del pidfile

2669

3246

del pidfilename

2670

2671

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

2672

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

2673

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

2674

3252

if use_dbus:

2675

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

2676

"se.bsnet.fukt.Mandos"})

2677

class MandosDBusService(DBusObjectWithProperties):

3253

3254

@alternate_dbus_interfaces(

3255

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

3256

class MandosDBusService(DBusObjectWithObjectManager):

2678

3257

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

3258

2679

3259

def __init__(self):

2680

3260

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

3261

2681

3262

_interface = "se.recompile.Mandos"

2682

2683

@dbus_interface_annotations(_interface)

2684

def _foo(self):

2685

return { "org.freedesktop.DBus.Property"

2686

".EmitsChangedSignal":

2687

"false"}

2688

3263

2689

3264

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

2690

3265

def ClientAdded(self, objpath):

2691

3266

"D-Bus signal"

2692

3267

pass

2693

3268

2694

3269

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

2695

3270

def ClientNotFound(self, fingerprint, address):

2696

3271

"D-Bus signal"

2697

3272

pass

2698

3273

3274

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

3275

"true"})

2699

3276

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

2700

3277

def ClientRemoved(self, objpath, name):

2701

3278

"D-Bus signal"

2702

3279

pass

2703

3280

3281

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

3282

"true"})

2704

3283

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

2705

3284

def GetAllClients(self):

2706

3285

"D-Bus method"

2707

return dbus.Array(c.dbus_object_path

2708

for c in

2709

tcp_server.clients.itervalues())

2710

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"})

2711

3291

@dbus.service.method(_interface,

2712

3292

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

2713

3293

def GetAllClientsWithProperties(self):

2714

3294

"D-Bus method"

2715

3295

return dbus.Dictionary(

2716

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

2717

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()},

2718

3299

signature="oa{sv}")

2719

3300

2720

3301

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

2721

3302

def RemoveClient(self, object_path):

2722

3303

"D-Bus method"

2723

for c in tcp_server.clients.itervalues():

3304

for c in tcp_server.clients.values():

2724

3305

if c.dbus_object_path == object_path:

2725

3306

del tcp_server.clients[c.name]

2726

3307

c.remove_from_connection()

2727

# Don't signal anything except ClientRemoved

3308

# Don't signal the disabling

2728

3309

c.disable(quiet=True)

2729

# Emit D-Bus signal

2730

self.ClientRemoved(object_path, c.name)

3310

# Emit D-Bus signal for removal

3311

self.client_removed_signal(c)

2731

3312

return

2732

3313

raise KeyError(object_path)

2733

3314

2734

3315

del _interface

2735

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

2736

3353

mandos_dbus_service = MandosDBusService()

2737

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

2738

3360

def cleanup():

2739

3361

"Cleanup function; run on exit"

2740

service.cleanup()

2741

2742

multiprocessing.active_children()

2743

wnull.close()

3362

if zeroconf:

3363

service.cleanup()

3364

3365

mp.active_children()

3366

wn.close()

2744

3367

if not (tcp_server.clients or client_settings):

2745

3368

return

2746

3369

2747

3370

# Store client before exiting. Secrets are encrypted with key

2748

3371

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

2749

3372

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

2750

3373

clients = {}

2751

3374

with PGPEngine() as pgp:

2752

for client in tcp_server.clients.itervalues():

3375

for client in tcp_server.clients.values():

2753

3376

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

2754

3377

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

2755

3378

key)

2756

3379

client_dict = {}

2757

3380

2758

3381

# A list of attributes that can not be pickled

2759

3382

# + secret.

2760

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

2761

"checker", "server_settings"))

2762

for name, typ in (inspect.getmembers

2763

(dbus.service.Object)):

3383

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

3384

"checker", "server_settings"}

3385

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

3386

.Object):

2764

3387

exclude.add(name)

2765

3388

2766

3389

client_dict["encrypted_secret"] = (client

2767

3390

.encrypted_secret)

2768

3391

for attr in client.client_structure:

2769

3392

if attr not in exclude:

2770

3393

client_dict[attr] = getattr(client, attr)

2771

3394

2772

3395

clients[client.name] = client_dict

2773

3396

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

2774

3397

2775

3398

try:

2776

with (tempfile.NamedTemporaryFile

2777

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

2778

dir=os.path.dirname(stored_state_path),

2779

delete=False)) as stored_state:

2780

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

2781

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

2782

3408

os.rename(tempname, stored_state_path)

2783

3409

except (IOError, OSError) as e:

2784

3410

if not debug:

2787

3413

except NameError:

2788

3414

pass

2789

3415

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

2790

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

3416

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

2791

3417

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

2792

3418

else:

2793

3419

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

2794

3420

exc_info=e)

2795

raise e

2796

3421

raise

3422

2797

3423

# Delete all clients, and settings from config

2798

3424

while tcp_server.clients:

2799

3425

name, client = tcp_server.clients.popitem()

2800

3426

if use_dbus:

2801

3427

client.remove_from_connection()

2802

# Don't signal anything except ClientRemoved

3428

# Don't signal the disabling

2803

3429

client.disable(quiet=True)

3430

# Emit D-Bus signal for removal

2804

3431

if use_dbus:

2805

# Emit D-Bus signal

2806

mandos_dbus_service.ClientRemoved(client

2807

.dbus_object_path,

2808

client.name)

3432

mandos_dbus_service.client_removed_signal(client)

2809

3433

client_settings.clear()

2810

3434

2811

3435

atexit.register(cleanup)

2812

2813

for client in tcp_server.clients.itervalues():

3436

3437

for client in tcp_server.clients.values():

2814

3438

if use_dbus:

2815

# Emit D-Bus signal

2816

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3439

# Emit D-Bus signal for adding

3440

mandos_dbus_service.client_added_signal(client)

2817

3441

# Need to initiate checking of clients

2818

3442

if client.enabled:

2819

3443

client.init_checker()

2820

3444

2821

3445

tcp_server.enable()

2822

3446

tcp_server.server_activate()

2823

3447

2824

3448

# Find out what port we got

2825

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

3449

if zeroconf:

3450

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

2826

3451

if use_ipv6:

2827

3452

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

2828

3453

" flowinfo %d, scope_id %d",

2830

3455

else: # IPv4

2831

3456

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

2832

3457

*tcp_server.socket.getsockname())

2833

2834

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

2835

3458

3459

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

3460

2836

3461

try:

2837

# From the Avahi example code

2838

try:

2839

service.activate()

2840

except dbus.exceptions.DBusException as error:

2841

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

2842

cleanup()

2843

sys.exit(1)

2844

# End of Avahi example code

2845

2846

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

2847

lambda *args, **kwargs:

2848

(tcp_server.handle_request

2849

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

2850

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

2851

3477

logger.debug("Starting main loop")

2852

3478

main_loop.run()

2853

3479

except AvahiError as error:

2862

3488

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

2863

3489

cleanup()

2864

3490

3491

2865

3492

if __name__ == '__main__':

2866

3493

main()