/mandos/release : revision 237.7.699

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#!/usr/bin/python2.7

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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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import gi

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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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# 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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118

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version = "1.6.9"

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.6"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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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 =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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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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185

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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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187

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def encrypt(self, data, password):

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245

passphrase = self.password_encode(password)

189

with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) 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()

193

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,

197

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)

257

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

201

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

204

261

205

262

def decrypt(self, data, password):

206

263

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

264

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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269

'--passphrase-file',

213

270

passfile.name]

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271

+ 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)

275

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

220

276

if proc.returncode != 0:

221

277

raise PGPError(err)

222

278

return decrypted_plaintext

223

279

224

280

281

# Pretend that we have an Avahi module

282

class avahi(object):

283

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

284

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

287

PROTO_INET6 = 1 # avahi-common/address.h

288

DBUS_NAME = "org.freedesktop.Avahi"

289

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

290

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

291

DBUS_PATH_SERVER = "/"

292

293

@staticmethod

294

def string_array_to_txt_array(t):

295

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

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

297

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

298

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

299

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

300

SERVER_INVALID = 0 # avahi-common/defs.h

301

SERVER_REGISTERING = 1 # avahi-common/defs.h

302

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

305

306

225

307

class AvahiError(Exception):

226

308

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

227

309

self.value = value

228

310

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

229

311

**kwargs)

230

312

313

231

314

class AvahiServiceError(AvahiError):

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pass

233

316

317

234

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class AvahiGroupError(AvahiError):

235

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pass

236

320

237

321

238

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class AvahiService(object):

239

323

"""An Avahi (Zeroconf) service.

240

324

241

325

Attributes:

242

326

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

243

327

Used to optionally bind to the specified interface.

255

339

server: D-Bus Server

256

340

bus: dbus.SystemBus()

257

341

"""

258

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

260

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

261

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

262

protocol = avahi.PROTO_UNSPEC, bus = None):

342

343

def __init__(self,

344

interface=avahi.IF_UNSPEC,

345

name=None,

346

servicetype=None,

347

port=None,

348

TXT=None,

349

domain="",

350

host="",

351

max_renames=32768,

352

protocol=avahi.PROTO_UNSPEC,

353

bus=None):

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354

self.interface = interface

264

355

self.name = name

265

356

self.type = servicetype

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365

self.server = None

275

366

self.bus = bus

276

367

self.entry_group_state_changed_match = None

277

368

278

369

def rename(self, remove=True):

279

370

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

280

371

if self.rename_count >= self.max_renames:

282

373

" after %i retries, exiting.",

283

374

self.rename_count)

284

375

raise AvahiServiceError("Too many renames")

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

376

self.name = str(

377

self.server.GetAlternativeServiceName(self.name))

287

378

self.rename_count += 1

288

379

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

289

380

self.name)

300

391

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

301

392

self.cleanup()

302

393

os._exit(1)

303

394

304

395

def remove(self):

305

396

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

306

397

if self.entry_group_state_changed_match is not None:

308

399

self.entry_group_state_changed_match = None

309

400

if self.group is not None:

310

401

self.group.Reset()

311

402

312

403

def add(self):

313

404

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

314

405

self.remove()

331

422

dbus.UInt16(self.port),

332

423

avahi.string_array_to_txt_array(self.TXT))

333

424

self.group.Commit()

334

425

335

426

def entry_group_state_changed(self, state, error):

336

427

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

337

428

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

338

429

339

430

if state == avahi.ENTRY_GROUP_ESTABLISHED:

340

431

logger.debug("Zeroconf service established.")

341

432

elif state == avahi.ENTRY_GROUP_COLLISION:

344

435

elif state == avahi.ENTRY_GROUP_FAILURE:

345

436

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

346

437

str(error))

347

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

348

.format(error))

349

438

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

439

350

440

def cleanup(self):

351

441

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

352

442

if self.group is not None:

357

447

pass

358

448

self.group = None

359

449

self.remove()

360

450

361

451

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

362

452

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

363

453

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

364

bad_states = { avahi.SERVER_INVALID:

365

"Zeroconf server invalid",

366

avahi.SERVER_REGISTERING: None,

367

avahi.SERVER_COLLISION:

368

"Zeroconf server name collision",

369

avahi.SERVER_FAILURE:

370

"Zeroconf server failure" }

454

bad_states = {

455

avahi.SERVER_INVALID: "Zeroconf server invalid",

456

avahi.SERVER_REGISTERING: None,

457

avahi.SERVER_COLLISION: "Zeroconf server name collision",

458

avahi.SERVER_FAILURE: "Zeroconf server failure",

459

}

371

460

if state in bad_states:

372

461

if bad_states[state] is not None:

373

462

if error is None:

376

465

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

377

466

self.cleanup()

378

467

elif state == avahi.SERVER_RUNNING:

379

self.add()

468

try:

469

self.add()

470

except dbus.exceptions.DBusException as error:

471

if (error.get_dbus_name()

472

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

473

logger.info("Local Zeroconf service name"

474

" collision.")

475

return self.rename(remove=False)

476

else:

477

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

478

self.cleanup()

479

os._exit(1)

380

480

else:

381

481

if error is None:

382

482

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

383

483

else:

384

484

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

385

485

386

486

def activate(self):

387

487

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

388

488

if self.server is None:

392

492

follow_name_owner_changes=True),

393

493

avahi.DBUS_INTERFACE_SERVER)

394

494

self.server.connect_to_signal("StateChanged",

395

self.server_state_changed)

495

self.server_state_changed)

396

496

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

397

497

398

498

399

499

class AvahiServiceToSyslog(AvahiService):

400

500

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

401

501

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

402

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

403

syslogger.setFormatter(logging.Formatter

404

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

405

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

406

.format(self.name)))

502

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

503

syslogger.setFormatter(logging.Formatter(

504

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

505

.format(self.name)))

407

506

return ret

408

507

409

508

509

# Pretend that we have a GnuTLS module

510

class gnutls(object):

511

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

512

513

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

514

if library is None:

515

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

516

_library = ctypes.cdll.LoadLibrary(library)

517

del library

518

519

# Unless otherwise indicated, the constants and types below are

520

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

521

522

# Constants

523

E_SUCCESS = 0

524

E_INTERRUPTED = -52

525

E_AGAIN = -28

526

CRT_OPENPGP = 2

527

CRT_RAWPK = 3

528

CLIENT = 2

529

SHUT_RDWR = 0

530

CRD_CERTIFICATE = 1

531

E_NO_CERTIFICATE_FOUND = -49

532

X509_FMT_DER = 0

533

NO_TICKETS = 1<<10

534

ENABLE_RAWPK = 1<<18

535

CTYPE_PEERS = 3

536

KEYID_USE_SHA256 = 1 # gnutls/x509.h

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

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

566

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

567

# code is passed, convert it to a string with

568

# gnutls.strerror()

569

self.code = code

570

if message is None and code is not None:

571

message = gnutls.strerror(code)

572

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

573

message, *args)

574

575

class CertificateSecurityError(Error):

576

pass

577

578

# Classes

579

class Credentials(object):

580

def __init__(self):

581

self._c_object = gnutls.certificate_credentials_t()

582

gnutls.certificate_allocate_credentials(

583

ctypes.byref(self._c_object))

584

self.type = gnutls.CRD_CERTIFICATE

585

586

def __del__(self):

587

gnutls.certificate_free_credentials(self._c_object)

588

589

class ClientSession(object):

590

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

591

self._c_object = gnutls.session_t()

592

gnutls_flags = gnutls.CLIENT

593

if gnutls.check_version(b"3.5.6"):

594

gnutls_flags |= gnutls.NO_TICKETS

595

if gnutls.has_rawpk:

596

gnutls_flags |= gnutls.ENABLE_RAWPK

597

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

598

del gnutls_flags

599

gnutls.set_default_priority(self._c_object)

600

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

601

gnutls.handshake_set_private_extensions(self._c_object,

602

True)

603

self.socket = socket

604

if credentials is None:

605

credentials = gnutls.Credentials()

606

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

607

ctypes.cast(credentials._c_object,

608

ctypes.c_void_p))

609

self.credentials = credentials

610

611

def __del__(self):

612

gnutls.deinit(self._c_object)

613

614

def handshake(self):

615

return gnutls.handshake(self._c_object)

616

617

def send(self, data):

618

data = bytes(data)

619

data_len = len(data)

620

while data_len > 0:

621

data_len -= gnutls.record_send(self._c_object,

622

data[-data_len:],

623

data_len)

624

625

def bye(self):

626

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

627

628

# Error handling functions

629

def _error_code(result):

630

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

631

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

632

if result >= 0:

633

return result

634

if result == gnutls.E_NO_CERTIFICATE_FOUND:

635

raise gnutls.CertificateSecurityError(code=result)

636

raise gnutls.Error(code=result)

637

638

def _retry_on_error(result, func, arguments):

639

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

640

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

641

while result < 0:

642

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

643

return _error_code(result)

644

result = func(*arguments)

645

return result

646

647

# Unless otherwise indicated, the function declarations below are

648

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

649

650

# Functions

651

priority_set_direct = _library.gnutls_priority_set_direct

652

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

653

ctypes.POINTER(ctypes.c_char_p)]

654

priority_set_direct.restype = _error_code

655

656

init = _library.gnutls_init

657

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

658

init.restype = _error_code

659

660

set_default_priority = _library.gnutls_set_default_priority

661

set_default_priority.argtypes = [session_t]

662

set_default_priority.restype = _error_code

663

664

record_send = _library.gnutls_record_send

665

record_send.argtypes = [session_t, ctypes.c_void_p,

666

ctypes.c_size_t]

667

record_send.restype = ctypes.c_ssize_t

668

record_send.errcheck = _retry_on_error

669

670

certificate_allocate_credentials = (

671

_library.gnutls_certificate_allocate_credentials)

672

certificate_allocate_credentials.argtypes = [

673

ctypes.POINTER(certificate_credentials_t)]

674

certificate_allocate_credentials.restype = _error_code

675

676

certificate_free_credentials = (

677

_library.gnutls_certificate_free_credentials)

678

certificate_free_credentials.argtypes = [

679

certificate_credentials_t]

680

certificate_free_credentials.restype = None

681

682

handshake_set_private_extensions = (

683

_library.gnutls_handshake_set_private_extensions)

684

handshake_set_private_extensions.argtypes = [session_t,

685

ctypes.c_int]

686

handshake_set_private_extensions.restype = None

687

688

credentials_set = _library.gnutls_credentials_set

689

credentials_set.argtypes = [session_t, credentials_type_t,

690

ctypes.c_void_p]

691

credentials_set.restype = _error_code

692

693

strerror = _library.gnutls_strerror

694

strerror.argtypes = [ctypes.c_int]

695

strerror.restype = ctypes.c_char_p

696

697

certificate_type_get = _library.gnutls_certificate_type_get

698

certificate_type_get.argtypes = [session_t]

699

certificate_type_get.restype = _error_code

700

701

certificate_get_peers = _library.gnutls_certificate_get_peers

702

certificate_get_peers.argtypes = [session_t,

703

ctypes.POINTER(ctypes.c_uint)]

704

certificate_get_peers.restype = ctypes.POINTER(datum_t)

705

706

global_set_log_level = _library.gnutls_global_set_log_level

707

global_set_log_level.argtypes = [ctypes.c_int]

708

global_set_log_level.restype = None

709

710

global_set_log_function = _library.gnutls_global_set_log_function

711

global_set_log_function.argtypes = [log_func]

712

global_set_log_function.restype = None

713

714

deinit = _library.gnutls_deinit

715

deinit.argtypes = [session_t]

716

deinit.restype = None

717

718

handshake = _library.gnutls_handshake

719

handshake.argtypes = [session_t]

720

handshake.restype = _error_code

721

handshake.errcheck = _retry_on_error

722

723

transport_set_ptr = _library.gnutls_transport_set_ptr

724

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

725

transport_set_ptr.restype = None

726

727

bye = _library.gnutls_bye

728

bye.argtypes = [session_t, close_request_t]

729

bye.restype = _error_code

730

bye.errcheck = _retry_on_error

731

732

check_version = _library.gnutls_check_version

733

check_version.argtypes = [ctypes.c_char_p]

734

check_version.restype = ctypes.c_char_p

735

736

_need_version = b"3.3.0"

737

if check_version(_need_version) is None:

738

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

739

.format(_need_version))

740

741

_tls_rawpk_version = b"3.6.6"

742

has_rawpk = bool(check_version(_tls_rawpk_version))

743

744

if has_rawpk:

745

# Types

746

class pubkey_st(ctypes.Structure):

747

_fields = []

748

pubkey_t = ctypes.POINTER(pubkey_st)

749

750

x509_crt_fmt_t = ctypes.c_int

751

752

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

753

pubkey_init = _library.gnutls_pubkey_init

754

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

755

pubkey_init.restype = _error_code

756

757

pubkey_import = _library.gnutls_pubkey_import

758

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

759

x509_crt_fmt_t]

760

pubkey_import.restype = _error_code

761

762

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

763

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

764

ctypes.POINTER(ctypes.c_ubyte),

765

ctypes.POINTER(ctypes.c_size_t)]

766

pubkey_get_key_id.restype = _error_code

767

768

pubkey_deinit = _library.gnutls_pubkey_deinit

769

pubkey_deinit.argtypes = [pubkey_t]

770

pubkey_deinit.restype = None

771

else:

772

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

773

774

openpgp_crt_init = _library.gnutls_openpgp_crt_init

775

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

776

openpgp_crt_init.restype = _error_code

777

778

openpgp_crt_import = _library.gnutls_openpgp_crt_import

779

openpgp_crt_import.argtypes = [openpgp_crt_t,

780

ctypes.POINTER(datum_t),

781

openpgp_crt_fmt_t]

782

openpgp_crt_import.restype = _error_code

783

784

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

785

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

786

ctypes.POINTER(ctypes.c_uint)]

787

openpgp_crt_verify_self.restype = _error_code

788

789

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

790

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

791

openpgp_crt_deinit.restype = None

792

793

openpgp_crt_get_fingerprint = (

794

_library.gnutls_openpgp_crt_get_fingerprint)

795

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

796

ctypes.c_void_p,

797

ctypes.POINTER(

798

ctypes.c_size_t)]

799

openpgp_crt_get_fingerprint.restype = _error_code

800

801

if check_version(b"3.6.4"):

802

certificate_type_get2 = _library.gnutls_certificate_type_get2

803

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

804

certificate_type_get2.restype = _error_code

805

806

# Remove non-public functions

807

del _error_code, _retry_on_error

808

809

810

def call_pipe(connection, # : multiprocessing.Connection

811

func, *args, **kwargs):

812

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

813

814

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

815

return value on the provided multiprocessing.Connection.

816

"""

817

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

818

connection.close()

819

820

410

821

class Client(object):

411

822

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

412

823

413

824

Attributes:

414

825

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

415

826

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

416

827

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

417

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

418

to see if the client lives.

419

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

828

checker: multiprocessing.Process(); a running checker process used

829

to see if the client lives. 'None' if no process is

830

running.

831

checker_callback_tag: a GLib event source tag, or None

421

832

checker_command: string; External command which is run to check

422

833

if client lives. %() expansions are done at

423

834

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

424

835

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

425

checker_initiator_tag: a gobject event source tag, or None

836

checker_initiator_tag: a GLib event source tag, or None

426

837

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

427

838

client_structure: Object describing what attributes a client has

428

839

and is used for storing the client at exit

429

840

current_checker_command: string; current running checker_command

430

disable_initiator_tag: a gobject event source tag, or None

841

disable_initiator_tag: a GLib event source tag, or None

431

842

enabled: bool()

432

843

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

433

uniquely identify the client

844

uniquely identify an OpenPGP client

845

key_id: string (64 hexadecimal digits); used to uniquely identify

846

a client using raw public keys

434

847

host: string; available for use by the checker command

435

848

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

436

849

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

438

851

last_checker_status: integer between 0 and 255 reflecting exit

439

852

status of last checker. -1 reflects crashed

440

853

checker, -2 means no checker completed yet.

854

last_checker_signal: The signal which killed the last checker, if

855

last_checker_status is -1

441

856

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

442

857

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

443

858

D-Bus identifiers

450

865

disabled, or None

451

866

server_settings: The server_settings dict from main()

452

867

"""

453

868

454

869

runtime_expansions = ("approval_delay", "approval_duration",

455

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

870

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

456

871

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

457

872

"last_approval_request", "last_checked_ok",

458

873

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

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

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

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

469

874

client_defaults = {

875

"timeout": "PT5M",

876

"extended_timeout": "PT15M",

877

"interval": "PT2M",

878

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

879

"host": "",

880

"approval_delay": "PT0S",

881

"approval_duration": "PT1S",

882

"approved_by_default": "True",

883

"enabled": "True",

884

}

885

470

886

@staticmethod

471

887

def config_parser(config):

472

888

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

479

895

for client_name in config.sections():

480

896

section = dict(config.items(client_name))

481

897

client = settings[client_name] = {}

482

898

483

899

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

484

900

# Reformat values from string types to Python types

485

901

client["approved_by_default"] = config.getboolean(

486

902

client_name, "approved_by_default")

487

903

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

488

904

"enabled")

489

905

906

# Uppercase and remove spaces from key_id and fingerprint

907

# for later comparison purposes with return value from the

908

# key_id() and fingerprint() functions

909

client["key_id"] = (section.get("key_id", "").upper()

910

.replace(" ", ""))

490

911

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

491

912

.replace(" ", ""))

492

913

if "secret" in section:

493

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

914

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

915

.encode("utf-8"),

916

"base64")

494

917

elif "secfile" in section:

495

918

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

496

919

(section["secfile"])),

511

934

client["last_approval_request"] = None

512

935

client["last_checked_ok"] = None

513

936

client["last_checker_status"] = -2

514

937

515

938

return settings

516

517

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

939

940

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

518

941

self.name = name

519

942

if server_settings is None:

520

943

server_settings = {}

522

945

# adding all client settings

523

946

for setting, value in settings.items():

524

947

setattr(self, setting, value)

525

948

526

949

if self.enabled:

527

950

if not hasattr(self, "last_enabled"):

528

951

self.last_enabled = datetime.datetime.utcnow()

532

955

else:

533

956

self.last_enabled = None

534

957

self.expires = None

535

958

536

959

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

537

# Uppercase and remove spaces from fingerprint for later

538

# comparison purposes with return value from the fingerprint()

539

# function

960

logger.debug(" Key ID: %s", self.key_id)

540

961

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

541

962

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

542

963

datetime.datetime.utcnow())

543

964

544

965

# attributes specific for this server instance

545

966

self.checker = None

546

967

self.checker_initiator_tag = None

549

970

self.current_checker_command = None

550

971

self.approved = None

551

972

self.approvals_pending = 0

552

self.changedstate = (multiprocessing_manager

553

.Condition(multiprocessing_manager

554

.Lock()))

555

self.client_structure = [attr for attr in

556

self.__dict__.iterkeys()

973

self.changedstate = multiprocessing_manager.Condition(

974

multiprocessing_manager.Lock())

975

self.client_structure = [attr

976

for attr in self.__dict__.keys()

557

977

if not attr.startswith("_")]

558

978

self.client_structure.append("client_structure")

559

560

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

561

lambda obj:

562

isinstance(obj,

563

property)):

979

980

for name, t in inspect.getmembers(

981

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

564

982

if not name.startswith("_"):

565

983

self.client_structure.append(name)

566

984

567

985

# Send notice to process children that client state has changed

568

986

def send_changedstate(self):

569

987

with self.changedstate:

570

988

self.changedstate.notify_all()

571

989

572

990

def enable(self):

573

991

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

574

992

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

579

997

self.last_enabled = datetime.datetime.utcnow()

580

998

self.init_checker()

581

999

self.send_changedstate()

582

1000

583

1001

def disable(self, quiet=True):

584

1002

"""Disable this client."""

585

1003

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

587

1005

if not quiet:

588

1006

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

589

1007

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

590

gobject.source_remove(self.disable_initiator_tag)

1008

GLib.source_remove(self.disable_initiator_tag)

591

1009

self.disable_initiator_tag = None

592

1010

self.expires = None

593

1011

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

594

gobject.source_remove(self.checker_initiator_tag)

1012

GLib.source_remove(self.checker_initiator_tag)

595

1013

self.checker_initiator_tag = None

596

1014

self.stop_checker()

597

1015

self.enabled = False

598

1016

if not quiet:

599

1017

self.send_changedstate()

600

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

1018

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

601

1019

return False

602

1020

603

1021

def __del__(self):

604

1022

self.disable()

605

1023

606

1024

def init_checker(self):

607

1025

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

608

1026

# and every interval from then on.

609

1027

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

614

self.start_checker))

1028

GLib.source_remove(self.checker_initiator_tag)

1029

self.checker_initiator_tag = GLib.timeout_add(

1030

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

1031

self.start_checker)

615

1032

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

616

1033

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

1034

GLib.source_remove(self.disable_initiator_tag)

1035

self.disable_initiator_tag = GLib.timeout_add(

1036

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

622

1037

# Also start a new checker *right now*.

623

1038

self.start_checker()

624

625

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

1039

1040

def checker_callback(self, source, condition, connection,

1041

command):

626

1042

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

1043

# Read return code from connection (see call_pipe)

1044

returncode = connection.recv()

1045

connection.close()

1046

self.checker.join()

627

1047

self.checker_callback_tag = None

628

1048

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1049

1050

if returncode >= 0:

1051

self.last_checker_status = returncode

1052

self.last_checker_signal = None

631

1053

if self.last_checker_status == 0:

632

1054

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

633

1055

vars(self))

634

1056

self.checked_ok()

635

1057

else:

636

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

637

vars(self))

1058

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

638

1059

else:

639

1060

self.last_checker_status = -1

1061

self.last_checker_signal = -returncode

640

1062

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

641

1063

vars(self))

642

1064

return False

1065

643

1066

def checked_ok(self):

644

1067

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

645

1068

self.last_checked_ok = datetime.datetime.utcnow()

646

1069

self.last_checker_status = 0

1070

self.last_checker_signal = None

647

1071

self.bump_timeout()

648

1072

649

1073

def bump_timeout(self, timeout=None):

650

1074

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

651

1075

if timeout is None:

652

1076

timeout = self.timeout

653

1077

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

1078

GLib.source_remove(self.disable_initiator_tag)

655

1079

self.disable_initiator_tag = None

656

1080

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

1081

self.disable_initiator_tag = GLib.timeout_add(

1082

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

660

1083

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

661

1084

662

1085

def need_approval(self):

663

1086

self.last_approval_request = datetime.datetime.utcnow()

664

1087

665

1088

def start_checker(self):

666

1089

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

667

1090

668

1091

If a checker already exists, leave it running and do

669

1092

nothing."""

670

1093

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

675

1098

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

676

1099

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

677

1100

# should be.

678

679

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

680

try:

681

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

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

1101

1102

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

1103

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

1104

self.checker.join()

1105

self.checker = None

693

1106

# Start a new checker if needed

694

1107

if self.checker is None:

695

1108

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

1109

escaped_attrs = {

1110

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

1111

for attr in self.runtime_expansions}

699

1112

try:

700

1113

command = self.checker_command % escaped_attrs

701

1114

except TypeError as error:

702

1115

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

1116

self.checker_command,

1117

exc_info=error)

1118

return True # Try again later

705

1119

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

721

self.checker = subprocess.Popen(command,

722

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

736

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

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

747

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

1120

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

1121

self.name)

1122

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

1123

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

1124

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

1125

# always replaced by /dev/null.)

1126

# The exception is when not debugging but nevertheless

1127

# running in the foreground; use the previously

1128

# created wnull.

1129

popen_args = {"close_fds": True,

1130

"shell": True,

1131

"cwd": "/"}

1132

if (not self.server_settings["debug"]

1133

and self.server_settings["foreground"]):

1134

popen_args.update({"stdout": wnull,

1135

"stderr": wnull})

1136

pipe = multiprocessing.Pipe(duplex=False)

1137

self.checker = multiprocessing.Process(

1138

target=call_pipe,

1139

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

1140

kwargs=popen_args)

1141

self.checker.start()

1142

self.checker_callback_tag = GLib.io_add_watch(

1143

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

1144

self.checker_callback, pipe[0], command)

1145

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

748

1146

return True

749

1147

750

1148

def stop_checker(self):

751

1149

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

752

1150

if self.checker_callback_tag:

753

gobject.source_remove(self.checker_callback_tag)

1151

GLib.source_remove(self.checker_callback_tag)

754

1152

self.checker_callback_tag = None

755

1153

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

756

1154

return

757

1155

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

758

try:

759

self.checker.terminate()

760

#time.sleep(0.5)

761

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

762

# self.checker.kill()

763

except OSError as error:

764

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

765

raise

1156

self.checker.terminate()

766

1157

self.checker = None

767

1158

768

1159

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

1160

def dbus_service_property(dbus_interface,

1161

signature="v",

1162

access="readwrite",

1163

byte_arrays=False):

771

1164

"""Decorators for marking methods of a DBusObjectWithProperties to

772

1165

become properties on the D-Bus.

773

1166

774

1167

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

775

1168

and with one argument by "Set".

776

1169

777

1170

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

778

1171

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

779

1172

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

783

1176

if byte_arrays and signature != "ay":

784

1177

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

785

1178

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

1179

786

1180

def decorator(func):

787

1181

func._dbus_is_property = True

788

1182

func._dbus_interface = dbus_interface

791

1185

func._dbus_name = func.__name__

792

1186

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

793

1187

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

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1188

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

795

1189

return func

1190

796

1191

return decorator

797

1192

798

1193

799

1194

def dbus_interface_annotations(dbus_interface):

800

1195

"""Decorator for marking functions returning interface annotations

801

1196

802

1197

Usage:

803

1198

804

1199

@dbus_interface_annotations("org.example.Interface")

805

1200

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

806

1201

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

807

1202

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

808

1203

"false"}

809

1204

"""

1205

810

1206

def decorator(func):

811

1207

func._dbus_is_interface = True

812

1208

func._dbus_interface = dbus_interface

813

1209

func._dbus_name = dbus_interface

814

1210

return func

1211

815

1212

return decorator

816

1213

817

1214

818

1215

def dbus_annotations(annotations):

819

1216

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

820

1217

Usage:

821

1218

822

1219

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

823

1220

"org.freedesktop.DBus.Property."

824

1221

"EmitsChangedSignal": "false"})

826

1223

access="r")

827

1224

def Property_dbus_property(self):

828

1225

return dbus.Boolean(False)

1226

1227

See also the DBusObjectWithAnnotations class.

829

1228

"""

1229

830

1230

def decorator(func):

831

1231

func._dbus_annotations = annotations

832

1232

return func

1233

833

1234

return decorator

834

1235

835

1236

838

1239

"""

839

1240

pass

840

1241

1242

841

1243

class DBusPropertyAccessException(DBusPropertyException):

842

1244

"""A property's access permissions disallows an operation.

843

1245

"""

850

1252

pass

851

1253

852

1254

853

class DBusObjectWithProperties(dbus.service.Object):

854

"""A D-Bus object with properties.

855

856

Classes inheriting from this can use the dbus_service_property

857

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

858

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

1255

class DBusObjectWithAnnotations(dbus.service.Object):

1256

"""A D-Bus object with annotations.

1257

1258

Classes inheriting from this can use the dbus_annotations

1259

decorator to add annotations to methods or signals.

859

1260

"""

860

1261

861

1262

@staticmethod

862

1263

def _is_dbus_thing(thing):

863

1264

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

864

1265

865

1266

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

866

1267

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

867

1268

"""

868

1269

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

869

1270

False)

870

1271

871

1272

def _get_all_dbus_things(self, thing):

872

1273

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

873

1274

"""

874

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

875

name),

1275

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

876

1276

athing.__get__(self))

877

1277

for cls in self.__class__.__mro__

878

1278

for name, athing in

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

881

1279

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

1280

1281

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1282

out_signature="s",

1283

path_keyword='object_path',

1284

connection_keyword='connection')

1285

def Introspect(self, object_path, connection):

1286

"""Overloading of standard D-Bus method.

1287

1288

Inserts annotation tags on methods and signals.

1289

"""

1290

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

1291

connection)

1292

try:

1293

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

1294

1295

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

1296

# Add annotation tags

1297

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

1298

for tag in if_tag.getElementsByTagName(typ):

1299

annots = dict()

1300

for name, prop in (self.

1301

_get_all_dbus_things(typ)):

1302

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

1303

and prop._dbus_interface

1304

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

1305

annots.update(getattr(

1306

prop, "_dbus_annotations", {}))

1307

for name, value in annots.items():

1308

ann_tag = document.createElement(

1309

"annotation")

1310

ann_tag.setAttribute("name", name)

1311

ann_tag.setAttribute("value", value)

1312

tag.appendChild(ann_tag)

1313

# Add interface annotation tags

1314

for annotation, value in dict(

1315

itertools.chain.from_iterable(

1316

annotations().items()

1317

for name, annotations

1318

in self._get_all_dbus_things("interface")

1319

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

1320

)).items():

1321

ann_tag = document.createElement("annotation")

1322

ann_tag.setAttribute("name", annotation)

1323

ann_tag.setAttribute("value", value)

1324

if_tag.appendChild(ann_tag)

1325

# Fix argument name for the Introspect method itself

1326

if (if_tag.getAttribute("name")

1327

== dbus.INTROSPECTABLE_IFACE):

1328

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

1329

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

1330

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

1331

if (arg.getAttribute("direction")

1332

== "out"):

1333

arg.setAttribute("name",

1334

"xml_data")

1335

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

1336

document.unlink()

1337

except (AttributeError, xml.dom.DOMException,

1338

xml.parsers.expat.ExpatError) as error:

1339

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

1340

exc_info=error)

1341

return xmlstring

1342

1343

1344

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1345

"""A D-Bus object with properties.

1346

1347

Classes inheriting from this can use the dbus_service_property

1348

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

1349

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

1350

"""

1351

882

1352

def _get_dbus_property(self, interface_name, property_name):

883

1353

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

884

1354

property with the specified name and interface.

885

1355

"""

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

1356

for cls in self.__class__.__mro__:

1357

for name, value in inspect.getmembers(

1358

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

890

1359

if (value._dbus_name == property_name

891

1360

and value._dbus_interface == interface_name):

892

1361

return value.__get__(self)

893

1362

894

1363

# No such property

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

898

899

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

1364

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

1365

self.dbus_object_path, interface_name, property_name))

1366

1367

@classmethod

1368

def _get_all_interface_names(cls):

1369

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

1370

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

1371

"_dbus_interface", None)

1372

for x in (inspect.getmro(cls))

1373

for attr in dir(x))

1374

if name is not None)

1375

1376

@dbus.service.method(dbus.PROPERTIES_IFACE,

1377

in_signature="ss",

900

1378

out_signature="v")

901

1379

def Get(self, interface_name, property_name):

902

1380

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

908

1386

if not hasattr(value, "variant_level"):

909

1387

return value

910

1388

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

911

1389

912

1390

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

913

1391

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

914

1392

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

926

1404

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

927

1405

for byte in value))

928

1406

prop(value)

929

930

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

1407

1408

@dbus.service.method(dbus.PROPERTIES_IFACE,

1409

in_signature="s",

931

1410

out_signature="a{sv}")

932

1411

def GetAll(self, interface_name):

933

1412

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

934

1413

standard.

935

1414

936

1415

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

937

1416

"""

938

1417

properties = {}

948

1427

if not hasattr(value, "variant_level"):

949

1428

properties[name] = value

950

1429

continue

951

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

952

value.variant_level+1)

1430

properties[name] = type(value)(

1431

value, variant_level=value.variant_level + 1)

953

1432

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

954

1433

955

1434

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

956

1435

def PropertiesChanged(self, interface_name, changed_properties,

957

1436

invalidated_properties):

959

1438

standard.

960

1439

"""

961

1440

pass

962

1441

963

1442

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

964

1443

out_signature="s",

965

1444

path_keyword='object_path',

966

1445

connection_keyword='connection')

967

1446

def Introspect(self, object_path, connection):

968

1447

"""Overloading of standard D-Bus method.

969

1448

970

1449

Inserts property tags and interface annotation tags.

971

1450

"""

972

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

973

connection)

1451

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1452

object_path,

1453

connection)

974

1454

try:

975

1455

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

1456

976

1457

def make_tag(document, name, prop):

977

1458

e = document.createElement("property")

978

1459

e.setAttribute("name", name)

979

1460

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

980

1461

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

981

1462

return e

1463

982

1464

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

983

1465

# Add property tags

984

1466

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

987

1469

if prop._dbus_interface

988

1470

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

989

1471

if_tag.appendChild(tag)

990

# Add annotation tags

991

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

992

for tag in if_tag.getElementsByTagName(typ):

993

annots = dict()

994

for name, prop in (self.

995

_get_all_dbus_things(typ)):

996

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

997

and prop._dbus_interface

998

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

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1003

for name, value in annots.items():

1004

ann_tag = document.createElement(

1005

"annotation")

1006

ann_tag.setAttribute("name", name)

1007

ann_tag.setAttribute("value", value)

1008

tag.appendChild(ann_tag)

1009

# Add interface annotation tags

1010

for annotation, value in dict(

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

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

1016

)).items():

1017

ann_tag = document.createElement("annotation")

1018

ann_tag.setAttribute("name", annotation)

1019

ann_tag.setAttribute("value", value)

1020

if_tag.appendChild(ann_tag)

1472

# Add annotation tags for properties

1473

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

1474

annots = dict()

1475

for name, prop in self._get_all_dbus_things(

1476

"property"):

1477

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

1478

and prop._dbus_interface

1479

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

1480

annots.update(getattr(

1481

prop, "_dbus_annotations", {}))

1482

for name, value in annots.items():

1483

ann_tag = document.createElement(

1484

"annotation")

1485

ann_tag.setAttribute("name", name)

1486

ann_tag.setAttribute("value", value)

1487

tag.appendChild(ann_tag)

1021

1488

# Add the names to the return values for the

1022

1489

# "org.freedesktop.DBus.Properties" methods

1023

1490

if (if_tag.getAttribute("name")

1042

1509

return xmlstring

1043

1510

1044

1511

1512

try:

1513

dbus.OBJECT_MANAGER_IFACE

1514

except AttributeError:

1515

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

1516

1517

1518

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1519

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

1520

1521

Classes inheriting from this exposes the standard

1522

GetManagedObjects call and the InterfacesAdded and

1523

InterfacesRemoved signals on the standard

1524

"org.freedesktop.DBus.ObjectManager" interface.

1525

1526

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

1527

manually.

1528

"""

1529

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1530

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

1531

def GetManagedObjects(self):

1532

"""This function must be overridden"""

1533

raise NotImplementedError()

1534

1535

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def InterfacesAdded(self, object_path, interfaces_and_properties):

1538

pass

1539

1540

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

1541

def InterfacesRemoved(self, object_path, interfaces):

1542

pass

1543

1544

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1545

out_signature="s",

1546

path_keyword='object_path',

1547

connection_keyword='connection')

1548

def Introspect(self, object_path, connection):

1549

"""Overloading of standard D-Bus method.

1550

1551

Override return argument name of GetManagedObjects to be

1552

"objpath_interfaces_and_properties"

1553

"""

1554

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1555

object_path,

1556

connection)

1557

try:

1558

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

1559

1560

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

1561

# Fix argument name for the GetManagedObjects method

1562

if (if_tag.getAttribute("name")

1563

== dbus.OBJECT_MANAGER_IFACE):

1564

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

1565

if (cn.getAttribute("name")

1566

== "GetManagedObjects"):

1567

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

1568

if (arg.getAttribute("direction")

1569

== "out"):

1570

arg.setAttribute(

1571

"name",

1572

"objpath_interfaces"

1573

"_and_properties")

1574

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

1575

document.unlink()

1576

except (AttributeError, xml.dom.DOMException,

1577

xml.parsers.expat.ExpatError) as error:

1578

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

1579

exc_info=error)

1580

return xmlstring

1581

1582

1045

1583

def datetime_to_dbus(dt, variant_level=0):

1046

1584

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

1047

1585

if dt is None:

1048

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1586

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

1587

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

1051

1588

1052

1589

1053

1590

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1055

1592

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

1056

1593

interface names according to the "alt_interface_names" mapping.

1057

1594

Usage:

1058

1595

1059

1596

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

1060

1597

"net.example.AlternateInterface"})

1061

1598

class SampleDBusObject(dbus.service.Object):

1062

1599

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

1063

1600

def SampleDBusMethod():

1064

1601

pass

1065

1602

1066

1603

The above "SampleDBusMethod" on "SampleDBusObject" will be

1067

1604

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

1068

1605

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

1069

1606

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

1070

1607

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

1071

1608

1072

1609

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

1073

1610

(from DBusObjectWithProperties) and interfaces (from the

1074

1611

dbus_interface_annotations decorator).

1075

1612

"""

1613

1076

1614

def wrapper(cls):

1077

1615

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1616

alt_interface_names.items()):

1079

1617

attr = {}

1080

1618

interface_names = set()

1081

1619

# Go though all attributes of the class

1083

1621

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

1084

1622

# with the wrong interface name

1085

1623

if (not hasattr(attribute, "_dbus_interface")

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1624

or not attribute._dbus_interface.startswith(

1625

orig_interface_name)):

1088

1626

continue

1089

1627

# Create an alternate D-Bus interface name based on

1090

1628

# the current name

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1629

alt_interface = attribute._dbus_interface.replace(

1630

orig_interface_name, alt_interface_name)

1094

1631

interface_names.add(alt_interface)

1095

1632

# Is this a D-Bus signal?

1096

1633

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

1097

1634

# Extract the original non-method undecorated

1098

1635

# function by black magic

1099

nonmethod_func = (dict(

1636

if sys.version_info.major == 2:

1637

nonmethod_func = (dict(

1100

1638

zip(attribute.func_code.co_freevars,

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1639

attribute.__closure__))

1640

["func"].cell_contents)

1641

else:

1642

nonmethod_func = (dict(

1643

zip(attribute.__code__.co_freevars,

1644

attribute.__closure__))

1645

["func"].cell_contents)

1103

1646

# Create a new, but exactly alike, function

1104

1647

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

1105

1648

# with the alternate D-Bus interface name

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1109

(types.FunctionType(

1110

nonmethod_func.func_code,

1111

nonmethod_func.func_globals,

1112

nonmethod_func.func_name,

1113

nonmethod_func.func_defaults,

1114

nonmethod_func.func_closure)))

1649

new_function = copy_function(nonmethod_func)

1650

new_function = (dbus.service.signal(

1651

alt_interface,

1652

attribute._dbus_signature)(new_function))

1115

1653

# Copy annotations, if any

1116

1654

try:

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1655

new_function._dbus_annotations = dict(

1656

attribute._dbus_annotations)

1119

1657

except AttributeError:

1120

1658

pass

1659

1121

1660

# Define a creator of a function to call both the

1122

1661

# original and alternate functions, so both the

1123

1662

# original and alternate signals gets sent when

1126

1665

"""This function is a scope container to pass

1127

1666

func1 and func2 to the "call_both" function

1128

1667

outside of its arguments"""

1668

1669

@functools.wraps(func2)

1129

1670

def call_both(*args, **kwargs):

1130

1671

"""This function will emit two D-Bus

1131

1672

signals by calling func1 and func2"""

1132

1673

func1(*args, **kwargs)

1133

1674

func2(*args, **kwargs)

1675

# Make wrapper function look like a D-Bus

1676

# signal

1677

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

1678

if name.startswith("_dbus_"):

1679

setattr(call_both, name, attr)

1680

1134

1681

return call_both

1135

1682

# Create the "call_both" function and add it to

1136

1683

# the class

1141

1688

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

1142

1689

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

1143

1690

# to the class.

1144

attr[attrname] = (dbus.service.method

1145

(alt_interface,

1146

attribute._dbus_in_signature,

1147

attribute._dbus_out_signature)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1691

attr[attrname] = (

1692

dbus.service.method(

1693

alt_interface,

1694

attribute._dbus_in_signature,

1695

attribute._dbus_out_signature)

1696

(copy_function(attribute)))

1154

1697

# Copy annotations, if any

1155

1698

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1699

attr[attrname]._dbus_annotations = dict(

1700

attribute._dbus_annotations)

1158

1701

except AttributeError:

1159

1702

pass

1160

1703

# Is this a D-Bus property?

1163

1706

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

1164

1707

# property with the alternate D-Bus interface

1165

1708

# name. Add it to the class.

1166

attr[attrname] = (dbus_service_property

1167

(alt_interface,

1168

attribute._dbus_signature,

1169

attribute._dbus_access,

1170

attribute

1171

._dbus_get_args_options

1172

["byte_arrays"])

1173

(types.FunctionType

1174

(attribute.func_code,

1175

attribute.func_globals,

1176

attribute.func_name,

1177

attribute.func_defaults,

1178

attribute.func_closure)))

1709

attr[attrname] = (dbus_service_property(

1710

alt_interface, attribute._dbus_signature,

1711

attribute._dbus_access,

1712

attribute._dbus_get_args_options

1713

["byte_arrays"])

1714

(copy_function(attribute)))

1179

1715

# Copy annotations, if any

1180

1716

try:

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1717

attr[attrname]._dbus_annotations = dict(

1718

attribute._dbus_annotations)

1183

1719

except AttributeError:

1184

1720

pass

1185

1721

# Is this a D-Bus interface?

1188

1724

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

1189

1725

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

1190

1726

# to the class.

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1727

attr[attrname] = (

1728

dbus_interface_annotations(alt_interface)

1729

(copy_function(attribute)))

1199

1730

if deprecate:

1200

1731

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1732

iname = "_AlternateDBusNames_interface_annotation{}"

1202

1733

for interface_name in interface_names:

1734

1203

1735

@dbus_interface_annotations(interface_name)

1204

1736

def func(self):

1205

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

1206

"true" }

1737

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

1738

"true"}

1207

1739

# Find an unused name

1208

1740

for aname in (iname.format(i)

1209

1741

for i in itertools.count()):

1213

1745

if interface_names:

1214

1746

# Replace the class with a new subclass of it with

1215

1747

# methods, signals, etc. as created above.

1216

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

1217

(cls,), attr)

1748

if sys.version_info.major == 2:

1749

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

1750

(cls, ), attr)

1751

else:

1752

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

1753

(cls, ), attr)

1218

1754

return cls

1755

1219

1756

return wrapper

1220

1757

1221

1758

1222

1759

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

1223

"se.bsnet.fukt.Mandos"})

1760

"se.bsnet.fukt.Mandos"})

1224

1761

class ClientDBus(Client, DBusObjectWithProperties):

1225

1762

"""A Client class using D-Bus

1226

1763

1227

1764

Attributes:

1228

1765

dbus_object_path: dbus.ObjectPath

1229

1766

bus: dbus.SystemBus()

1230

1767

"""

1231

1768

1232

1769

runtime_expansions = (Client.runtime_expansions

1233

+ ("dbus_object_path",))

1234

1770

+ ("dbus_object_path", ))

1771

1235

1772

_interface = "se.recompile.Mandos.Client"

1236

1773

1237

1774

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

1238

1239

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

1775

1776

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

1240

1777

self.bus = bus

1241

1778

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

1242

1779

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

1244

1781

client_object_name = str(self.name).translate(

1245

1782

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

1246

1783

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

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1784

self.dbus_object_path = dbus.ObjectPath(

1785

"/clients/" + client_object_name)

1249

1786

DBusObjectWithProperties.__init__(self, self.bus,

1250

1787

self.dbus_object_path)

1251

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1788

1789

def notifychangeproperty(transform_func, dbus_name,

1790

type_func=lambda x: x,

1791

variant_level=1,

1792

invalidate_only=False,

1255

1793

_interface=_interface):

1256

1794

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

1257

1795

its changes to DBus.

1258

1796

1259

1797

transform_fun: Function that takes a value and a variant_level

1260

1798

and transforms it to a D-Bus type.

1261

1799

dbus_name: D-Bus name of the variable

1264

1802

variant_level: D-Bus variant level. Default: 1

1265

1803

"""

1266

1804

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

1805

1267

1806

def setter(self, value):

1268

1807

if hasattr(self, "dbus_object_path"):

1269

1808

if (not hasattr(self, attrname) or

1270

1809

type_func(getattr(self, attrname, None))

1271

1810

!= type_func(value)):

1272

1811

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1812

self.PropertiesChanged(

1813

_interface, dbus.Dictionary(),

1814

dbus.Array((dbus_name, )))

1277

1815

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1816

dbus_value = transform_func(

1817

type_func(value),

1818

variant_level=variant_level)

1281

1819

self.PropertyChanged(dbus.String(dbus_name),

1282

1820

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1821

self.PropertiesChanged(

1822

_interface,

1823

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

1824

dbus_value}),

1825

dbus.Array())

1287

1826

setattr(self, attrname, value)

1288

1827

1289

1828

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

1290

1829

1291

1830

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1292

1831

approvals_pending = notifychangeproperty(dbus.Boolean,

1293

1832

"ApprovalPending",

1294

type_func = bool)

1833

type_func=bool)

1295

1834

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

1296

1835

last_enabled = notifychangeproperty(datetime_to_dbus,

1297

1836

"LastEnabled")

1298

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

1299

type_func = lambda checker:

1300

checker is not None)

1837

checker = notifychangeproperty(

1838

dbus.Boolean, "CheckerRunning",

1839

type_func=lambda checker: checker is not None)

1301

1840

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1302

1841

"LastCheckedOK")

1303

1842

last_checker_status = notifychangeproperty(dbus.Int16,

1306

1845

datetime_to_dbus, "LastApprovalRequest")

1307

1846

approved_by_default = notifychangeproperty(dbus.Boolean,

1308

1847

"ApprovedByDefault")

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1848

approval_delay = notifychangeproperty(

1849

dbus.UInt64, "ApprovalDelay",

1850

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

1314

1851

approval_duration = notifychangeproperty(

1315

1852

dbus.UInt64, "ApprovalDuration",

1316

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

1853

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

1317

1854

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1855

timeout = notifychangeproperty(

1856

dbus.UInt64, "Timeout",

1857

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

1321

1858

extended_timeout = notifychangeproperty(

1322

1859

dbus.UInt64, "ExtendedTimeout",

1323

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

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1860

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

1861

interval = notifychangeproperty(

1862

dbus.UInt64, "Interval",

1863

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

1329

1864

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

1330

1865

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

1331

1866

invalidate_only=True)

1332

1867

1333

1868

del notifychangeproperty

1334

1869

1335

1870

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

1336

1871

try:

1337

1872

self.remove_from_connection()

1340

1875

if hasattr(DBusObjectWithProperties, "__del__"):

1341

1876

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

1342

1877

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

1343

1344

def checker_callback(self, pid, condition, command,

1345

*args, **kwargs):

1346

self.checker_callback_tag = None

1347

self.checker = None

1348

if os.WIFEXITED(condition):

1349

exitstatus = os.WEXITSTATUS(condition)

1878

1879

def checker_callback(self, source, condition,

1880

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

1881

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

1882

connection, command, *args,

1883

**kwargs)

1884

exitstatus = self.last_checker_status

1885

if exitstatus >= 0:

1350

1886

# Emit D-Bus signal

1351

1887

self.CheckerCompleted(dbus.Int16(exitstatus),

1352

dbus.Int64(condition),

1888

# This is specific to GNU libC

1889

dbus.Int64(exitstatus << 8),

1353

1890

dbus.String(command))

1354

1891

else:

1355

1892

# Emit D-Bus signal

1356

1893

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

1357

dbus.Int64(condition),

1894

dbus.Int64(

1895

# This is specific to GNU libC

1896

(exitstatus << 8)

1897

| self.last_checker_signal),

1358

1898

dbus.String(command))

1359

1360

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

1361

*args, **kwargs)

1362

1899

return ret

1900

1363

1901

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

1364

1902

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

1365

1903

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

1369

1907

# Emit D-Bus signal

1370

1908

self.CheckerStarted(self.current_checker_command)

1371

1909

return r

1372

1910

1373

1911

def _reset_approved(self):

1374

1912

self.approved = None

1375

1913

return False

1376

1914

1377

1915

def approve(self, value=True):

1378

1916

self.approved = value

1379

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

1380

* 1000), self._reset_approved)

1917

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

1918

* 1000), self._reset_approved)

1381

1919

self.send_changedstate()

1382

1383

## D-Bus methods, signals & properties

1384

1385

## Interfaces

1386

1387

## Signals

1388

1920

1921

# D-Bus methods, signals & properties

1922

1923

# Interfaces

1924

1925

# Signals

1926

1389

1927

# CheckerCompleted - signal

1390

1928

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

1391

1929

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

1392

1930

"D-Bus signal"

1393

1931

pass

1394

1932

1395

1933

# CheckerStarted - signal

1396

1934

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

1397

1935

def CheckerStarted(self, command):

1398

1936

"D-Bus signal"

1399

1937

pass

1400

1938

1401

1939

# PropertyChanged - signal

1402

1940

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

1403

1941

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

1404

1942

def PropertyChanged(self, property, value):

1405

1943

"D-Bus signal"

1406

1944

pass

1407

1945

1408

1946

# GotSecret - signal

1409

1947

@dbus.service.signal(_interface)

1410

1948

def GotSecret(self):

1413

1951

server to mandos-client

1414

1952

"""

1415

1953

pass

1416

1954

1417

1955

# Rejected - signal

1418

1956

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

1419

1957

def Rejected(self, reason):

1420

1958

"D-Bus signal"

1421

1959

pass

1422

1960

1423

1961

# NeedApproval - signal

1424

1962

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

1425

1963

def NeedApproval(self, timeout, default):

1426

1964

"D-Bus signal"

1427

1965

return self.need_approval()

1428

1429

## Methods

1430

1966

1967

# Methods

1968

1431

1969

# Approve - method

1432

1970

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

1433

1971

def Approve(self, value):

1434

1972

self.approve(value)

1435

1973

1436

1974

# CheckedOK - method

1437

1975

@dbus.service.method(_interface)

1438

1976

def CheckedOK(self):

1439

1977

self.checked_ok()

1440

1978

1441

1979

# Enable - method

1980

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

1442

1981

@dbus.service.method(_interface)

1443

1982

def Enable(self):

1444

1983

"D-Bus method"

1445

1984

self.enable()

1446

1985

1447

1986

# StartChecker - method

1987

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

1448

1988

@dbus.service.method(_interface)

1449

1989

def StartChecker(self):

1450

1990

"D-Bus method"

1451

1991

self.start_checker()

1452

1992

1453

1993

# Disable - method

1994

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

1454

1995

@dbus.service.method(_interface)

1455

1996

def Disable(self):

1456

1997

"D-Bus method"

1457

1998

self.disable()

1458

1999

1459

2000

# StopChecker - method

2001

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

1460

2002

@dbus.service.method(_interface)

1461

2003

def StopChecker(self):

1462

2004

self.stop_checker()

1463

1464

## Properties

1465

2005

2006

# Properties

2007

1466

2008

# ApprovalPending - property

1467

2009

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

1468

2010

def ApprovalPending_dbus_property(self):

1469

2011

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

1470

2012

1471

2013

# ApprovedByDefault - property

1472

@dbus_service_property(_interface, signature="b",

2014

@dbus_service_property(_interface,

2015

signature="b",

1473

2016

access="readwrite")

1474

2017

def ApprovedByDefault_dbus_property(self, value=None):

1475

2018

if value is None: # get

1476

2019

return dbus.Boolean(self.approved_by_default)

1477

2020

self.approved_by_default = bool(value)

1478

2021

1479

2022

# ApprovalDelay - property

1480

@dbus_service_property(_interface, signature="t",

2023

@dbus_service_property(_interface,

2024

signature="t",

1481

2025

access="readwrite")

1482

2026

def ApprovalDelay_dbus_property(self, value=None):

1483

2027

if value is None: # get

1484

2028

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

1485

2029

* 1000)

1486

2030

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

1487

2031

1488

2032

# ApprovalDuration - property

1489

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1490

2035

access="readwrite")

1491

2036

def ApprovalDuration_dbus_property(self, value=None):

1492

2037

if value is None: # get

1493

2038

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

1494

2039

* 1000)

1495

2040

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

1496

2041

1497

2042

# Name - property

2043

@dbus_annotations(

2044

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

1498

2045

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

1499

2046

def Name_dbus_property(self):

1500

2047

return dbus.String(self.name)

1501

2048

2049

# KeyID - property

2050

@dbus_annotations(

2051

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

2052

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

2053

def KeyID_dbus_property(self):

2054

return dbus.String(self.key_id)

2055

1502

2056

# Fingerprint - property

2057

@dbus_annotations(

2058

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

1503

2059

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

1504

2060

def Fingerprint_dbus_property(self):

1505

2061

return dbus.String(self.fingerprint)

1506

2062

1507

2063

# Host - property

1508

@dbus_service_property(_interface, signature="s",

2064

@dbus_service_property(_interface,

2065

signature="s",

1509

2066

access="readwrite")

1510

2067

def Host_dbus_property(self, value=None):

1511

2068

if value is None: # get

1512

2069

return dbus.String(self.host)

1513

2070

self.host = str(value)

1514

2071

1515

2072

# Created - property

2073

@dbus_annotations(

2074

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

1516

2075

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

1517

2076

def Created_dbus_property(self):

1518

2077

return datetime_to_dbus(self.created)

1519

2078

1520

2079

# LastEnabled - property

1521

2080

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

1522

2081

def LastEnabled_dbus_property(self):

1523

2082

return datetime_to_dbus(self.last_enabled)

1524

2083

1525

2084

# Enabled - property

1526

@dbus_service_property(_interface, signature="b",

2085

@dbus_service_property(_interface,

2086

signature="b",

1527

2087

access="readwrite")

1528

2088

def Enabled_dbus_property(self, value=None):

1529

2089

if value is None: # get

1532

2092

self.enable()

1533

2093

else:

1534

2094

self.disable()

1535

2095

1536

2096

# LastCheckedOK - property

1537

@dbus_service_property(_interface, signature="s",

2097

@dbus_service_property(_interface,

2098

signature="s",

1538

2099

access="readwrite")

1539

2100

def LastCheckedOK_dbus_property(self, value=None):

1540

2101

if value is not None:

1541

2102

self.checked_ok()

1542

2103

return

1543

2104

return datetime_to_dbus(self.last_checked_ok)

1544

2105

1545

2106

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

2107

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

1548

2108

def LastCheckerStatus_dbus_property(self):

1549

2109

return dbus.Int16(self.last_checker_status)

1550

2110

1551

2111

# Expires - property

1552

2112

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

1553

2113

def Expires_dbus_property(self):

1554

2114

return datetime_to_dbus(self.expires)

1555

2115

1556

2116

# LastApprovalRequest - property

1557

2117

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

1558

2118

def LastApprovalRequest_dbus_property(self):

1559

2119

return datetime_to_dbus(self.last_approval_request)

1560

2120

1561

2121

# Timeout - property

1562

@dbus_service_property(_interface, signature="t",

2122

@dbus_service_property(_interface,

2123

signature="t",

1563

2124

access="readwrite")

1564

2125

def Timeout_dbus_property(self, value=None):

1565

2126

if value is None: # get

1577

2138

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

1578

2139

is None):

1579

2140

return

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1585

2141

GLib.source_remove(self.disable_initiator_tag)

2142

self.disable_initiator_tag = GLib.timeout_add(

2143

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

2144

self.disable)

2145

1586

2146

# ExtendedTimeout - property

1587

@dbus_service_property(_interface, signature="t",

2147

@dbus_service_property(_interface,

2148

signature="t",

1588

2149

access="readwrite")

1589

2150

def ExtendedTimeout_dbus_property(self, value=None):

1590

2151

if value is None: # get

1591

2152

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

1592

2153

* 1000)

1593

2154

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

1594

2155

1595

2156

# Interval - property

1596

@dbus_service_property(_interface, signature="t",

2157

@dbus_service_property(_interface,

2158

signature="t",

1597

2159

access="readwrite")

1598

2160

def Interval_dbus_property(self, value=None):

1599

2161

if value is None: # get

1603

2165

return

1604

2166

if self.enabled:

1605

2167

# Reschedule checker run

1606

gobject.source_remove(self.checker_initiator_tag)

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1610

2168

GLib.source_remove(self.checker_initiator_tag)

2169

self.checker_initiator_tag = GLib.timeout_add(

2170

value, self.start_checker)

2171

self.start_checker() # Start one now, too

2172

1611

2173

# Checker - property

1612

@dbus_service_property(_interface, signature="s",

2174

@dbus_service_property(_interface,

2175

signature="s",

1613

2176

access="readwrite")

1614

2177

def Checker_dbus_property(self, value=None):

1615

2178

if value is None: # get

1616

2179

return dbus.String(self.checker_command)

1617

2180

self.checker_command = str(value)

1618

2181

1619

2182

# CheckerRunning - property

1620

@dbus_service_property(_interface, signature="b",

2183

@dbus_service_property(_interface,

2184

signature="b",

1621

2185

access="readwrite")

1622

2186

def CheckerRunning_dbus_property(self, value=None):

1623

2187

if value is None: # get

1626

2190

self.start_checker()

1627

2191

else:

1628

2192

self.stop_checker()

1629

2193

1630

2194

# ObjectPath - property

2195

@dbus_annotations(

2196

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

2197

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

1631

2198

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

1632

2199

def ObjectPath_dbus_property(self):

1633

return self.dbus_object_path # is already a dbus.ObjectPath

1634

2200

return self.dbus_object_path # is already a dbus.ObjectPath

2201

1635

2202

# Secret = property

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

2203

@dbus_annotations(

2204

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

2205

"invalidates"})

2206

@dbus_service_property(_interface,

2207

signature="ay",

2208

access="write",

2209

byte_arrays=True)

1638

2210

def Secret_dbus_property(self, value):

1639

2211

self.secret = bytes(value)

1640

2212

1641

2213

del _interface

1642

2214

1643

2215

1644

2216

class ProxyClient(object):

1645

def __init__(self, child_pipe, fpr, address):

2217

def __init__(self, child_pipe, key_id, fpr, address):

1646

2218

self._pipe = child_pipe

1647

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

2219

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

1648

2220

if not self._pipe.recv():

1649

raise KeyError()

1650

2221

raise KeyError(key_id or fpr)

2222

1651

2223

def __getattribute__(self, name):

1652

2224

if name == '_pipe':

1653

2225

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

1656

2228

if data[0] == 'data':

1657

2229

return data[1]

1658

2230

if data[0] == 'function':

2231

1659

2232

def func(*args, **kwargs):

1660

2233

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

1661

2234

return self._pipe.recv()[1]

2235

1662

2236

return func

1663

2237

1664

2238

def __setattr__(self, name, value):

1665

2239

if name == '_pipe':

1666

2240

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

1669

2243

1670

2244

class ClientHandler(socketserver.BaseRequestHandler, object):

1671

2245

"""A class to handle client connections.

1672

2246

1673

2247

Instantiated once for each connection to handle it.

1674

2248

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

1675

2249

1676

2250

def handle(self):

1677

2251

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

1678

2252

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

1679

2253

str(self.client_address))

1680

2254

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

1681

2255

self.server.child_pipe.fileno())

1682

1683

session = (gnutls.connection

1684

.ClientSession(self.request,

1685

gnutls.connection

1686

.X509Credentials()))

1687

1688

# Note: gnutls.connection.X509Credentials is really a

1689

# generic GnuTLS certificate credentials object so long as

1690

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

1691

# here despite using OpenPGP certificates.

1692

1693

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

1694

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

1695

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

1696

# "+DHE-DSS"))

2256

2257

session = gnutls.ClientSession(self.request)

2258

2259

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

2260

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

2261

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

2262

# "+DHE-DSS"))

1697

2263

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

1698

2264

priority = self.server.gnutls_priority

1699

2265

if priority is None:

1700

2266

priority = "NORMAL"

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1704

2267

gnutls.priority_set_direct(session._c_object,

2268

priority.encode("utf-8"),

2269

None)

2270

1705

2271

# Start communication using the Mandos protocol

1706

2272

# Get protocol number

1707

2273

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

1712

2278

except (ValueError, IndexError, RuntimeError) as error:

1713

2279

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

1714

2280

return

1715

2281

1716

2282

# Start GnuTLS connection

1717

2283

try:

1718

2284

session.handshake()

1719

except gnutls.errors.GNUTLSError as error:

2285

except gnutls.Error as error:

1720

2286

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

1721

2287

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

1722

2288

# established. Just abandon the request.

1723

2289

return

1724

2290

logger.debug("Handshake succeeded")

1725

2291

1726

2292

approval_required = False

1727

2293

try:

1728

try:

1729

fpr = self.fingerprint(self.peer_certificate

1730

(session))

1731

except (TypeError,

1732

gnutls.errors.GNUTLSError) as error:

1733

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

1734

return

1735

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

1736

1737

try:

1738

client = ProxyClient(child_pipe, fpr,

2294

if gnutls.has_rawpk:

2295

fpr = b""

2296

try:

2297

key_id = self.key_id(

2298

self.peer_certificate(session))

2299

except (TypeError, gnutls.Error) as error:

2300

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

2301

return

2302

logger.debug("Key ID: %s", key_id)

2303

2304

else:

2305

key_id = b""

2306

try:

2307

fpr = self.fingerprint(

2308

self.peer_certificate(session))

2309

except (TypeError, gnutls.Error) as error:

2310

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

2311

return

2312

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

2313

2314

try:

2315

client = ProxyClient(child_pipe, key_id, fpr,

1739

2316

self.client_address)

1740

2317

except KeyError:

1741

2318

return

1742

2319

1743

2320

if client.approval_delay:

1744

2321

delay = client.approval_delay

1745

2322

client.approvals_pending += 1

1746

2323

approval_required = True

1747

2324

1748

2325

while True:

1749

2326

if not client.enabled:

1750

2327

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

1751

client.name)

2328

client.name)

1752

2329

if self.server.use_dbus:

1753

2330

# Emit D-Bus signal

1754

2331

client.Rejected("Disabled")

1755

2332

return

1756

2333

1757

2334

if client.approved or not client.approval_delay:

1758

#We are approved or approval is disabled

2335

# We are approved or approval is disabled

1759

2336

break

1760

2337

elif client.approved is None:

1761

2338

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

1772

2349

# Emit D-Bus signal

1773

2350

client.Rejected("Denied")

1774

2351

return

1775

1776

#wait until timeout or approved

2352

2353

# wait until timeout or approved

1777

2354

time = datetime.datetime.now()

1778

2355

client.changedstate.acquire()

1779

2356

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

1792

2369

break

1793

2370

else:

1794

2371

delay -= time2 - time

1795

1796

sent_size = 0

1797

while sent_size < len(client.secret):

1798

try:

1799

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

1800

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1803

return

1804

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

1805

sent, len(client.secret)

1806

- (sent_size + sent))

1807

sent_size += sent

1808

2372

2373

try:

2374

session.send(client.secret)

2375

except gnutls.Error as error:

2376

logger.warning("gnutls send failed",

2377

exc_info=error)

2378

return

2379

1809

2380

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

1810

2381

# bump the timeout using extended_timeout

1811

2382

client.bump_timeout(client.extended_timeout)

1812

2383

if self.server.use_dbus:

1813

2384

# Emit D-Bus signal

1814

2385

client.GotSecret()

1815

2386

1816

2387

finally:

1817

2388

if approval_required:

1818

2389

client.approvals_pending -= 1

1819

2390

try:

1820

2391

session.bye()

1821

except gnutls.errors.GNUTLSError as error:

2392

except gnutls.Error as error:

1822

2393

logger.warning("GnuTLS bye failed",

1823

2394

exc_info=error)

1824

2395

1825

2396

@staticmethod

1826

2397

def peer_certificate(session):

1827

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

1828

# If not an OpenPGP certificate...

1829

if (gnutls.library.functions

1830

.gnutls_certificate_type_get(session._c_object)

1831

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1832

# ...do the normal thing

1833

return session.peer_certificate

2398

"Return the peer's certificate as a bytestring"

2399

try:

2400

cert_type = gnutls.certificate_type_get2(session._c_object,

2401

gnutls.CTYPE_PEERS)

2402

except AttributeError:

2403

cert_type = gnutls.certificate_type_get(session._c_object)

2404

if gnutls.has_rawpk:

2405

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2406

else:

2407

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2408

# If not a valid certificate type...

2409

if cert_type not in valid_cert_types:

2410

logger.info("Cert type %r not in %r", cert_type,

2411

valid_cert_types)

2412

# ...return invalid data

2413

return b""

1834

2414

list_size = ctypes.c_uint(1)

1835

cert_list = (gnutls.library.functions

1836

.gnutls_certificate_get_peers

2415

cert_list = (gnutls.certificate_get_peers

1837

2416

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

1838

2417

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

1839

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

1840

" certificate")

2418

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

1841

2419

if list_size.value == 0:

1842

2420

return None

1843

2421

cert = cert_list[0]

1844

2422

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

1845

2423

2424

@staticmethod

2425

def key_id(certificate):

2426

"Convert a certificate bytestring to a hexdigit key ID"

2427

# New GnuTLS "datum" with the public key

2428

datum = gnutls.datum_t(

2429

ctypes.cast(ctypes.c_char_p(certificate),

2430

ctypes.POINTER(ctypes.c_ubyte)),

2431

ctypes.c_uint(len(certificate)))

2432

# XXX all these need to be created in the gnutls "module"

2433

# New empty GnuTLS certificate

2434

pubkey = gnutls.pubkey_t()

2435

gnutls.pubkey_init(ctypes.byref(pubkey))

2436

# Import the raw public key into the certificate

2437

gnutls.pubkey_import(pubkey,

2438

ctypes.byref(datum),

2439

gnutls.X509_FMT_DER)

2440

# New buffer for the key ID

2441

buf = ctypes.create_string_buffer(32)

2442

buf_len = ctypes.c_size_t(len(buf))

2443

# Get the key ID from the raw public key into the buffer

2444

gnutls.pubkey_get_key_id(pubkey,

2445

gnutls.KEYID_USE_SHA256,

2446

ctypes.cast(ctypes.byref(buf),

2447

ctypes.POINTER(ctypes.c_ubyte)),

2448

ctypes.byref(buf_len))

2449

# Deinit the certificate

2450

gnutls.pubkey_deinit(pubkey)

2451

2452

# Convert the buffer to a Python bytestring

2453

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

2454

# Convert the bytestring to hexadecimal notation

2455

hex_key_id = binascii.hexlify(key_id).upper()

2456

return hex_key_id

2457

1846

2458

@staticmethod

1847

2459

def fingerprint(openpgp):

1848

2460

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1849

2461

# New GnuTLS "datum" with the OpenPGP public key

1850

datum = (gnutls.library.types

1851

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

1852

ctypes.POINTER

1853

(ctypes.c_ubyte)),

1854

ctypes.c_uint(len(openpgp))))

2462

datum = gnutls.datum_t(

2463

ctypes.cast(ctypes.c_char_p(openpgp),

2464

ctypes.POINTER(ctypes.c_ubyte)),

2465

ctypes.c_uint(len(openpgp)))

1855

2466

# New empty GnuTLS certificate

1856

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2467

crt = gnutls.openpgp_crt_t()

2468

gnutls.openpgp_crt_init(ctypes.byref(crt))

1859

2469

# Import the OpenPGP public key into the certificate

1860

(gnutls.library.functions

1861

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

1862

gnutls.library.constants

1863

.GNUTLS_OPENPGP_FMT_RAW))

2470

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

2471

gnutls.OPENPGP_FMT_RAW)

1864

2472

# Verify the self signature in the key

1865

2473

crtverify = ctypes.c_uint()

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

2474

gnutls.openpgp_crt_verify_self(crt, 0,

2475

ctypes.byref(crtverify))

1869

2476

if crtverify.value != 0:

1870

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

2477

gnutls.openpgp_crt_deinit(crt)

2478

raise gnutls.CertificateSecurityError(code

2479

=crtverify.value)

1873

2480

# New buffer for the fingerprint

1874

2481

buf = ctypes.create_string_buffer(20)

1875

2482

buf_len = ctypes.c_size_t()

1876

2483

# Get the fingerprint from the certificate into the buffer

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

2484

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

2485

ctypes.byref(buf_len))

1880

2486

# Deinit the certificate

1881

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2487

gnutls.openpgp_crt_deinit(crt)

1882

2488

# Convert the buffer to a Python bytestring

1883

2489

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

1884

2490

# Convert the bytestring to hexadecimal notation

1888

2494

1889

2495

class MultiprocessingMixIn(object):

1890

2496

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

2497

1891

2498

def sub_process_main(self, request, address):

1892

2499

try:

1893

2500

self.finish_request(request, address)

1894

2501

except Exception:

1895

2502

self.handle_error(request, address)

1896

2503

self.close_request(request)

1897

2504

1898

2505

def process_request(self, request, address):

1899

2506

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

1900

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

1901

args = (request, address))

2507

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

2508

args=(request, address))

1902

2509

proc.start()

1903

2510

return proc

1904

2511

1905

2512

1906

2513

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1907

2514

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

2515

1908

2516

def process_request(self, request, client_address):

1909

2517

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

1910

2518

1911

2519

This function creates a new pipe in self.pipe

1912

2520

"""

1913

2521

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1914

2522

1915

2523

proc = MultiprocessingMixIn.process_request(self, request,

1916

2524

client_address)

1917

2525

self.child_pipe.close()

1918

2526

self.add_pipe(parent_pipe, proc)

1919

2527

1920

2528

def add_pipe(self, parent_pipe, proc):

1921

2529

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

1922

2530

raise NotImplementedError()

1925

2533

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1926

2534

socketserver.TCPServer, object):

1927

2535

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

1928

2536

1929

2537

Attributes:

1930

2538

enabled: Boolean; whether this server is activated yet

1931

2539

interface: None or a network interface name (string)

1932

2540

use_ipv6: Boolean; to use IPv6 or not

1933

2541

"""

2542

1934

2543

def __init__(self, server_address, RequestHandlerClass,

1935

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

2544

interface=None,

2545

use_ipv6=True,

2546

socketfd=None):

1936

2547

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

1937

2548

creating a new one with socket.socket().

1938

2549

"""

1944

2555

self.socketfd = socketfd

1945

2556

# Save the original socket.socket() function

1946

2557

self.socket_socket = socket.socket

2558

1947

2559

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

1948

#

2560

#

1949

2561

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

1950

2562

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

1951

2563

# patching socket.socket.)

1952

#

2564

#

1953

2565

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

1954

2566

@functools.wraps(socket.socket)

1955

2567

def socket_wrapper(*args, **kwargs):

1967

2579

# socket_wrapper(), if socketfd was set.

1968

2580

socketserver.TCPServer.__init__(self, server_address,

1969

2581

RequestHandlerClass)

1970

2582

1971

2583

def server_bind(self):

1972

2584

"""This overrides the normal server_bind() function

1973

2585

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

1974

2586

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

2587

global SO_BINDTODEVICE

1975

2588

if self.interface is not None:

1976

2589

if SO_BINDTODEVICE is None:

1977

logger.error("SO_BINDTODEVICE does not exist;"

1978

" cannot bind to interface %s",

1979

self.interface)

1980

else:

1981

try:

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1983

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1986

except socket.error as error:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1991

logger.error("SO_BINDTODEVICE not available;"

1992

" cannot bind to interface %s",

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1997

else:

1998

raise

2590

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

2591

# common enough.

2592

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

2593

SO_BINDTODEVICE = 25

2594

try:

2595

self.socket.setsockopt(

2596

socket.SOL_SOCKET, SO_BINDTODEVICE,

2597

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

2598

except socket.error as error:

2599

if error.errno == errno.EPERM:

2600

logger.error("No permission to bind to"

2601

" interface %s", self.interface)

2602

elif error.errno == errno.ENOPROTOOPT:

2603

logger.error("SO_BINDTODEVICE not available;"

2604

" cannot bind to interface %s",

2605

self.interface)

2606

elif error.errno == errno.ENODEV:

2607

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

2608

" cannot bind", self.interface)

2609

else:

2610

raise

1999

2611

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

2000

2612

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

2613

if self.server_address[1]:

2614

self.allow_reuse_address = True

2001

2615

if not self.server_address[0]:

2002

2616

if self.address_family == socket.AF_INET6:

2003

any_address = "::" # in6addr_any

2617

any_address = "::" # in6addr_any

2004

2618

else:

2005

any_address = "0.0.0.0" # INADDR_ANY

2619

any_address = "0.0.0.0" # INADDR_ANY

2006

2620

self.server_address = (any_address,

2007

2621

self.server_address[1])

2008

2622

elif not self.server_address[1]:

2009

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

2010

0)

2623

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

2011

2624

# if self.interface:

2012

2625

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

2013

2626

# 0, # port

2019

2632

2020

2633

class MandosServer(IPv6_TCPServer):

2021

2634

"""Mandos server.

2022

2635

2023

2636

Attributes:

2024

2637

clients: set of Client objects

2025

2638

gnutls_priority GnuTLS priority string

2026

2639

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

2027

2028

Assumes a gobject.MainLoop event loop.

2640

2641

Assumes a GLib.MainLoop event loop.

2029

2642

"""

2643

2030

2644

def __init__(self, server_address, RequestHandlerClass,

2031

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

2032

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

2645

interface=None,

2646

use_ipv6=True,

2647

clients=None,

2648

gnutls_priority=None,

2649

use_dbus=True,

2650

socketfd=None):

2033

2651

self.enabled = False

2034

2652

self.clients = clients

2035

2653

if self.clients is None:

2038

2656

self.gnutls_priority = gnutls_priority

2039

2657

IPv6_TCPServer.__init__(self, server_address,

2040

2658

RequestHandlerClass,

2041

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

2659

interface=interface,

2660

use_ipv6=use_ipv6,

2661

socketfd=socketfd)

2662

2044

2663

def server_activate(self):

2045

2664

if self.enabled:

2046

2665

return socketserver.TCPServer.server_activate(self)

2047

2666

2048

2667

def enable(self):

2049

2668

self.enabled = True

2050

2669

2051

2670

def add_pipe(self, parent_pipe, proc):

2052

2671

# Call "handle_ipc" for both data and EOF events

2053

gobject.io_add_watch(parent_pipe.fileno(),

2054

gobject.IO_IN | gobject.IO_HUP,

2055

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2059

2060

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

2061

proc = None, client_object=None):

2672

GLib.io_add_watch(

2673

parent_pipe.fileno(),

2674

GLib.IO_IN | GLib.IO_HUP,

2675

functools.partial(self.handle_ipc,

2676

parent_pipe=parent_pipe,

2677

proc=proc))

2678

2679

def handle_ipc(self, source, condition,

2680

parent_pipe=None,

2681

proc=None,

2682

client_object=None):

2062

2683

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

2063

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

2684

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

2064

2685

# Wait for other process to exit

2065

2686

proc.join()

2066

2687

return False

2067

2688

2068

2689

# Read a request from the child

2069

2690

request = parent_pipe.recv()

2070

2691

command = request[0]

2071

2692

2072

2693

if command == 'init':

2073

fpr = request[1]

2074

address = request[2]

2075

2076

for c in self.clients.itervalues():

2077

if c.fingerprint == fpr:

2694

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

2695

fpr = request[2].decode("ascii")

2696

address = request[3]

2697

2698

for c in self.clients.values():

2699

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2700

continue

2701

if key_id and c.key_id == key_id:

2702

client = c

2703

break

2704

if fpr and c.fingerprint == fpr:

2078

2705

client = c

2079

2706

break

2080

2707

else:

2081

logger.info("Client not found for fingerprint: %s, ad"

2082

"dress: %s", fpr, address)

2708

logger.info("Client not found for key ID: %s, address"

2709

": %s", key_id or fpr, address)

2083

2710

if self.use_dbus:

2084

2711

# Emit D-Bus signal

2085

mandos_dbus_service.ClientNotFound(fpr,

2712

mandos_dbus_service.ClientNotFound(key_id or fpr,

2086

2713

address[0])

2087

2714

parent_pipe.send(False)

2088

2715

return False

2089

2090

gobject.io_add_watch(parent_pipe.fileno(),

2091

gobject.IO_IN | gobject.IO_HUP,

2092

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

2716

2717

GLib.io_add_watch(

2718

parent_pipe.fileno(),

2719

GLib.IO_IN | GLib.IO_HUP,

2720

functools.partial(self.handle_ipc,

2721

parent_pipe=parent_pipe,

2722

proc=proc,

2723

client_object=client))

2098

2724

parent_pipe.send(True)

2099

2725

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

2100

2726

# same fileno

2103

2729

funcname = request[1]

2104

2730

args = request[2]

2105

2731

kwargs = request[3]

2106

2732

2107

2733

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

2108

2734

funcname)(*args,

2109

**kwargs)))

2110

2735

**kwargs)))

2736

2111

2737

if command == 'getattr':

2112

2738

attrname = request[1]

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2739

if isinstance(client_object.__getattribute__(attrname),

2740

collections.Callable):

2741

parent_pipe.send(('function', ))

2115

2742

else:

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2118

2743

parent_pipe.send((

2744

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

2745

2119

2746

if command == 'setattr':

2120

2747

attrname = request[1]

2121

2748

value = request[2]

2122

2749

setattr(client_object, attrname, value)

2123

2750

2124

2751

return True

2125

2752

2126

2753

2127

2754

def rfc3339_duration_to_delta(duration):

2128

2755

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

2129

2756

2130

2757

>>> rfc3339_duration_to_delta("P7D")

2131

2758

datetime.timedelta(7)

2132

2759

>>> rfc3339_duration_to_delta("PT60S")

2142

2769

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

2770

datetime.timedelta(1, 200)

2144

2771

"""

2145

2772

2146

2773

# Parsing an RFC 3339 duration with regular expressions is not

2147

2774

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

2148

2775

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

2149

2776

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

2150

2777

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

2151

2778

# avoid excessive use of external libraries.

2152

2779

2153

2780

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2781

Token = collections.namedtuple("Token", (

2782

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

2783

# a "group" containing digits

2784

"value", # datetime.timedelta or None

2785

"followers")) # Tokens valid after this token

2163

2786

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

2164

2787

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

2165

2788

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

2166

2789

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

2167

2790

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2791

frozenset((token_end, )))

2169

2792

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

2170

2793

datetime.timedelta(minutes=1),

2171

2794

frozenset((token_second, token_end)))

2187

2810

frozenset((token_month, token_end)))

2188

2811

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

2189

2812

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2813

frozenset((token_end, )))

2191

2814

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

2192

2815

frozenset((token_year, token_month,

2193

2816

token_day, token_time,

2194

2817

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2818

# Define starting values:

2819

# Value so far

2820

value = datetime.timedelta()

2197

2821

found_token = None

2198

followers = frozenset((token_duration,)) # Following valid tokens

2199

s = duration # String left to parse

2822

# Following valid tokens

2823

followers = frozenset((token_duration, ))

2824

# String left to parse

2825

s = duration

2200

2826

# Loop until end token is found

2201

2827

while found_token is not token_end:

2202

2828

# Search for any currently valid tokens

2218

2844

break

2219

2845

else:

2220

2846

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2847

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

2848

.format(duration))

2222

2849

# End token found

2223

2850

return value

2224

2851

2225

2852

2226

2853

def string_to_delta(interval):

2227

2854

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

2228

2855

2229

2856

>>> string_to_delta('7d')

2230

2857

datetime.timedelta(7)

2231

2858

>>> string_to_delta('60s')

2239

2866

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

2240

2867

datetime.timedelta(0, 330)

2241

2868

"""

2242

2869

2243

2870

try:

2244

2871

return rfc3339_duration_to_delta(interval)

2245

2872

except ValueError:

2246

2873

pass

2247

2874

2248

2875

timevalue = datetime.timedelta(0)

2249

2876

for s in interval.split():

2250

2877

try:

2261

2888

elif suffix == "w":

2262

2889

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

2263

2890

else:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2891

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

2266

2892

except IndexError as e:

2267

2893

raise ValueError(*(e.args))

2268

2894

timevalue += delta

2269

2895

return timevalue

2270

2896

2271

2897

2272

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

2898

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

2273

2899

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

2274

2900

2275

2901

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

2276

2902

if os.fork():

2277

2903

sys.exit()

2284

2910

# Close all standard open file descriptors

2285

2911

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

2286

2912

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

2287

raise OSError(errno.ENODEV, "{} not a character device"

2913

raise OSError(errno.ENODEV,

2914

"{} not a character device"

2288

2915

.format(os.devnull))

2289

2916

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

2290

2917

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

2294

2921

2295

2922

2296

2923

def main():

2297

2924

2298

2925

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

2299

2926

# Parsing of options, both command line and config file

2300

2927

2301

2928

parser = argparse.ArgumentParser()

2302

2929

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

2303

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

2930

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

2304

2931

help="show version number and exit")

2305

2932

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

2306

2933

help="Bind to interface IF")

2342

2969

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

2343

2970

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

2344

2971

default=None)

2345

2972

2346

2973

options = parser.parse_args()

2347

2974

2348

2975

if options.check:

2349

2976

import doctest

2350

2977

fail_count, test_count = doctest.testmod()

2351

2978

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

2352

2979

2353

2980

# Default values for config file for server-global settings

2354

server_defaults = { "interface": "",

2355

"address": "",

2356

"port": "",

2357

"debug": "False",

2358

"priority":

2359

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

2360

"servicename": "Mandos",

2361

"use_dbus": "True",

2362

"use_ipv6": "True",

2363

"debuglevel": "",

2364

"restore": "True",

2365

"socket": "",

2366

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

2367

"foreground": "False",

2368

"zeroconf": "True",

2369

}

2370

2981

if gnutls.has_rawpk:

2982

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

2983

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2984

else:

2985

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

2986

":+SIGN-DSA-SHA256")

2987

server_defaults = {"interface": "",

2988

"address": "",

2989

"port": "",

2990

"debug": "False",

2991

"priority": priority,

2992

"servicename": "Mandos",

2993

"use_dbus": "True",

2994

"use_ipv6": "True",

2995

"debuglevel": "",

2996

"restore": "True",

2997

"socket": "",

2998

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

2999

"foreground": "False",

3000

"zeroconf": "True",

3001

}

3002

del priority

3003

2371

3004

# Parse config file for server-global settings

2372

server_config = configparser.SafeConfigParser(server_defaults)

3005

server_config = configparser.ConfigParser(server_defaults)

2373

3006

del server_defaults

2374

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

2375

"mandos.conf"))

2376

# Convert the SafeConfigParser object to a dict

3007

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

3008

# Convert the ConfigParser object to a dict

2377

3009

server_settings = server_config.defaults()

2378

3010

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

2379

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

3011

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

3012

"foreground", "zeroconf"):

2380

3013

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

2381

3014

option)

2382

3015

if server_settings["port"]:

2392

3025

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

2393

3026

["socket"])

2394

3027

del server_config

2395

3028

2396

3029

# Override the settings from the config file with command line

2397

3030

# options, if set.

2398

3031

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

2399

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

2400

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

2401

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

3032

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

3033

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

3034

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

2402

3035

value = getattr(options, option)

2403

3036

if value is not None:

2404

3037

server_settings[option] = value

2416

3049

if server_settings["debug"]:

2417

3050

server_settings["foreground"] = True

2418

3051

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

2419

3052

2420

3053

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

2421

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2427

3054

3055

if (not server_settings["zeroconf"]

3056

and not (server_settings["port"]

3057

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

3058

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

3059

2428

3060

# For convenience

2429

3061

debug = server_settings["debug"]

2430

3062

debuglevel = server_settings["debuglevel"]

2434

3066

stored_state_file)

2435

3067

foreground = server_settings["foreground"]

2436

3068

zeroconf = server_settings["zeroconf"]

2437

3069

2438

3070

if debug:

2439

3071

initlogger(debug, logging.DEBUG)

2440

3072

else:

2443

3075

else:

2444

3076

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

2445

3077

initlogger(debug, level)

2446

3078

2447

3079

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

2448

syslogger.setFormatter(logging.Formatter

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

2453

3080

syslogger.setFormatter(

3081

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

3082

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

3083

server_settings["servicename"])))

3084

2454

3085

# Parse config file with clients

2455

client_config = configparser.SafeConfigParser(Client

2456

.client_defaults)

3086

client_config = configparser.ConfigParser(Client.client_defaults)

2457

3087

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

2458

3088

"clients.conf"))

2459

3089

2460

3090

global mandos_dbus_service

2461

3091

mandos_dbus_service = None

2462

3092

2463

3093

socketfd = None

2464

3094

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

2465

3095

socketfd = server_settings["socket"]

2466

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

2467

server_settings["port"]),

2468

ClientHandler,

2469

interface=(server_settings["interface"]

2470

or None),

2471

use_ipv6=use_ipv6,

2472

gnutls_priority=

2473

server_settings["priority"],

2474

use_dbus=use_dbus,

2475

socketfd=socketfd)

3096

tcp_server = MandosServer(

3097

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

3098

ClientHandler,

3099

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

3100

use_ipv6=use_ipv6,

3101

gnutls_priority=server_settings["priority"],

3102

use_dbus=use_dbus,

3103

socketfd=socketfd)

2476

3104

if not foreground:

2477

3105

pidfilename = "/run/mandos.pid"

2478

3106

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

2479

3107

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

2480

3108

pidfile = None

2481

3109

try:

2482

pidfile = open(pidfilename, "w")

3110

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

2483

3111

except IOError as e:

2484

3112

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

2485

3113

exc_info=e)

2486

2487

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

3114

3115

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

3116

("mandos", "mandos"),

3117

("nobody", "nogroup")):

2488

3118

try:

2489

3119

uid = pwd.getpwnam(name).pw_uid

2490

gid = pwd.getpwnam(name).pw_gid

3120

gid = pwd.getpwnam(group).pw_gid

2491

3121

break

2492

3122

except KeyError:

2493

3123

continue

2497

3127

try:

2498

3128

os.setgid(gid)

2499

3129

os.setuid(uid)

3130

if debug:

3131

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

3132

gid))

2500

3133

except OSError as error:

3134

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

3135

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

2501

3136

if error.errno != errno.EPERM:

2502

3137

raise

2503

3138

2504

3139

if debug:

2505

3140

# Enable all possible GnuTLS debugging

2506

3141

2507

3142

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

2508

3143

# - GnuTLS manual

2509

gnutls.library.functions.gnutls_global_set_log_level(11)

2510

2511

@gnutls.library.types.gnutls_log_func

3144

gnutls.global_set_log_level(11)

3145

3146

@gnutls.log_func

2512

3147

def debug_gnutls(level, string):

2513

3148

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

2514

2515

(gnutls.library.functions

2516

.gnutls_global_set_log_function(debug_gnutls))

2517

3149

3150

gnutls.global_set_log_function(debug_gnutls)

3151

2518

3152

# Redirect stdin so all checkers get /dev/null

2519

3153

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

2520

3154

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

2521

3155

if null > 2:

2522

3156

os.close(null)

2523

3157

2524

3158

# Need to fork before connecting to D-Bus

2525

3159

if not foreground:

2526

3160

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

2527

3161

daemon()

2528

2529

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

2530

# need to inform gobject that threads will be used.

2531

gobject.threads_init()

2532

3162

3163

if gi.version_info < (3, 10, 2):

3164

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

3165

# need to inform GLib that threads will be used.

3166

GLib.threads_init()

3167

2533

3168

global main_loop

2534

3169

# From the Avahi example code

2535

3170

DBusGMainLoop(set_as_default=True)

2536

main_loop = gobject.MainLoop()

3171

main_loop = GLib.MainLoop()

2537

3172

bus = dbus.SystemBus()

2538

3173

# End of Avahi example code

2539

3174

if use_dbus:

2540

3175

try:

2541

3176

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

2542

bus, do_not_queue=True)

2543

old_bus_name = (dbus.service.BusName

2544

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

2545

do_not_queue=True))

2546

except dbus.exceptions.NameExistsException as e:

3177

bus,

3178

do_not_queue=True)

3179

old_bus_name = dbus.service.BusName(

3180

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

3181

do_not_queue=True)

3182

except dbus.exceptions.DBusException as e:

2547

3183

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

2548

3184

use_dbus = False

2549

3185

server_settings["use_dbus"] = False

2550

3186

tcp_server.use_dbus = False

2551

3187

if zeroconf:

2552

3188

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

3189

service = AvahiServiceToSyslog(

3190

name=server_settings["servicename"],

3191

servicetype="_mandos._tcp",

3192

protocol=protocol,

3193

bus=bus)

2557

3194

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2561

3195

service.interface = if_nametoindex(

3196

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

3197

2562

3198

global multiprocessing_manager

2563

3199

multiprocessing_manager = multiprocessing.Manager()

2564

3200

2565

3201

client_class = Client

2566

3202

if use_dbus:

2567

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

2568

3203

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

3204

2569

3205

client_settings = Client.config_parser(client_config)

2570

3206

old_client_settings = {}

2571

3207

clients_data = {}

2572

3208

2573

3209

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

2574

3210

global wnull

2575

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

3211

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

2576

3212

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

2577

3213

# mode

2578

3214

if debug or not foreground:

2579

3215

wnull.close()

2580

3216

2581

3217

# Get client data and settings from last running state.

2582

3218

if server_settings["restore"]:

2583

3219

try:

2584

3220

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

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

3221

if sys.version_info.major == 2:

3222

clients_data, old_client_settings = pickle.load(

3223

stored_state)

3224

else:

3225

bytes_clients_data, bytes_old_client_settings = (

3226

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

3227

# Fix bytes to strings

3228

# clients_data

3229

# .keys()

3230

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

3231

if isinstance(key, bytes)

3232

else key): value

3233

for key, value in

3234

bytes_clients_data.items()}

3235

del bytes_clients_data

3236

for key in clients_data:

3237

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

3238

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

3239

for k, v in

3240

clients_data[key].items()}

3241

clients_data[key] = value

3242

# .client_structure

3243

value["client_structure"] = [

3244

(s.decode("utf-8")

3245

if isinstance(s, bytes)

3246

else s) for s in

3247

value["client_structure"]]

3248

# .name & .host

3249

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

3250

if isinstance(value[k], bytes):

3251

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

3252

if "key_id" not in value:

3253

value["key_id"] = ""

3254

elif "fingerprint" not in value:

3255

value["fingerprint"] = ""

3256

# old_client_settings

3257

# .keys()

3258

old_client_settings = {

3259

(key.decode("utf-8")

3260

if isinstance(key, bytes)

3261

else key): value

3262

for key, value in

3263

bytes_old_client_settings.items()}

3264

del bytes_old_client_settings

3265

# .host

3266

for value in old_client_settings.values():

3267

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

3268

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

3269

.decode("utf-8"))

2587

3270

os.remove(stored_state_path)

2588

3271

except IOError as e:

2589

3272

if e.errno == errno.ENOENT:

2590

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

2591

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

3273

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

3274

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

2592

3275

else:

2593

3276

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

2594

3277

exc_info=e)

2595

3278

raise

2596

3279

except EOFError as e:

2597

3280

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

2598

"EOFError:", exc_info=e)

2599

3281

"EOFError:",

3282

exc_info=e)

3283

2600

3284

with PGPEngine() as pgp:

2601

3285

for client_name, client in clients_data.items():

2602

3286

# Skip removed clients

2603

3287

if client_name not in client_settings:

2604

3288

continue

2605

3289

2606

3290

# Decide which value to use after restoring saved state.

2607

3291

# We have three different values: Old config file,

2608

3292

# new config file, and saved state.

2613

3297

# For each value in new config, check if it

2614

3298

# differs from the old config value (Except for

2615

3299

# the "secret" attribute)

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

3300

if (name != "secret"

3301

and (value !=

3302

old_client_settings[client_name][name])):

2619

3303

client[name] = value

2620

3304

except KeyError:

2621

3305

pass

2622

3306

2623

3307

# Clients who has passed its expire date can still be

2624

# enabled if its last checker was successful. Clients

3308

# enabled if its last checker was successful. A Client

2625

3309

# whose checker succeeded before we stored its state is

2626

3310

# assumed to have successfully run all checkers during

2627

3311

# downtime.

2630

3314

if not client["last_checked_ok"]:

2631

3315

logger.warning(

2632

3316

"disabling client {} - Client never "

2633

"performed a successful checker"

2634

.format(client_name))

3317

"performed a successful checker".format(

3318

client_name))

2635

3319

client["enabled"] = False

2636

3320

elif client["last_checker_status"] != 0:

2637

3321

logger.warning(

2638

3322

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

3323

" checker failed with error code"

3324

" {}".format(

3325

client_name,

3326

client["last_checker_status"]))

2642

3327

client["enabled"] = False

2643

3328

else:

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

3329

client["expires"] = (

3330

datetime.datetime.utcnow()

3331

+ client["timeout"])

2647

3332

logger.debug("Last checker succeeded,"

2648

" keeping {} enabled"

2649

.format(client_name))

3333

" keeping {} enabled".format(

3334

client_name))

2650

3335

try:

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

3336

client["secret"] = pgp.decrypt(

3337

client["encrypted_secret"],

3338

client_settings[client_name]["secret"])

2655

3339

except PGPError:

2656

3340

# If decryption fails, we use secret from new settings

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2661

3341

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

3342

client_name))

3343

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

3344

["secret"])

3345

2662

3346

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

2663

3347

for client_name in (set(old_client_settings)

2664

3348

- set(client_settings)):

2666

3350

for client_name in (set(client_settings)

2667

3351

- set(old_client_settings)):

2668

3352

clients_data[client_name] = client_settings[client_name]

2669

3353

2670

3354

# Create all client objects

2671

3355

for client_name, client in clients_data.items():

2672

3356

tcp_server.clients[client_name] = client_class(

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2675

3357

name=client_name,

3358

settings=client,

3359

server_settings=server_settings)

3360

2676

3361

if not tcp_server.clients:

2677

3362

logger.warning("No clients defined")

2678

3363

2679

3364

if not foreground:

2680

3365

if pidfile is not None:

3366

pid = os.getpid()

2681

3367

try:

2682

3368

with pidfile:

2683

pid = os.getpid()

2684

pidfile.write("{}\n".format(pid).encode("utf-8"))

3369

print(pid, file=pidfile)

2685

3370

except IOError:

2686

3371

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

2687

3372

pidfilename, pid)

2688

3373

del pidfile

2689

3374

del pidfilename

2690

2691

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

2692

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

2693

3375

3376

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

3377

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3378

lambda: main_loop.quit() and False)

3379

2694

3380

if use_dbus:

2695

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

2696

"se.bsnet.fukt.Mandos"})

2697

class MandosDBusService(DBusObjectWithProperties):

3381

3382

@alternate_dbus_interfaces(

3383

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

3384

class MandosDBusService(DBusObjectWithObjectManager):

2698

3385

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

3386

2699

3387

def __init__(self):

2700

3388

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

3389

2701

3390

_interface = "se.recompile.Mandos"

2702

2703

@dbus_interface_annotations(_interface)

2704

def _foo(self):

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

2708

3391

2709

3392

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

2710

3393

def ClientAdded(self, objpath):

2711

3394

"D-Bus signal"

2712

3395

pass

2713

3396

2714

3397

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

2715

def ClientNotFound(self, fingerprint, address):

3398

def ClientNotFound(self, key_id, address):

2716

3399

"D-Bus signal"

2717

3400

pass

2718

3401

3402

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

3403

"true"})

2719

3404

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

2720

3405

def ClientRemoved(self, objpath, name):

2721

3406

"D-Bus signal"

2722

3407

pass

2723

3408

3409

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

3410

"true"})

2724

3411

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

2725

3412

def GetAllClients(self):

2726

3413

"D-Bus method"

2727

return dbus.Array(c.dbus_object_path

2728

for c in

2729

tcp_server.clients.itervalues())

2730

3414

return dbus.Array(c.dbus_object_path for c in

3415

tcp_server.clients.values())

3416

3417

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

3418

"true"})

2731

3419

@dbus.service.method(_interface,

2732

3420

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

2733

3421

def GetAllClientsWithProperties(self):

2734

3422

"D-Bus method"

2735

3423

return dbus.Dictionary(

2736

{ c.dbus_object_path: c.GetAll("")

2737

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

3424

{c.dbus_object_path: c.GetAll(

3425

"se.recompile.Mandos.Client")

3426

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

2738

3427

signature="oa{sv}")

2739

3428

2740

3429

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

2741

3430

def RemoveClient(self, object_path):

2742

3431

"D-Bus method"

2743

for c in tcp_server.clients.itervalues():

3432

for c in tcp_server.clients.values():

2744

3433

if c.dbus_object_path == object_path:

2745

3434

del tcp_server.clients[c.name]

2746

3435

c.remove_from_connection()

2747

# Don't signal anything except ClientRemoved

3436

# Don't signal the disabling

2748

3437

c.disable(quiet=True)

2749

# Emit D-Bus signal

2750

self.ClientRemoved(object_path, c.name)

3438

# Emit D-Bus signal for removal

3439

self.client_removed_signal(c)

2751

3440

return

2752

3441

raise KeyError(object_path)

2753

3442

2754

3443

del _interface

2755

3444

3445

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3446

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

3447

def GetManagedObjects(self):

3448

"""D-Bus method"""

3449

return dbus.Dictionary(

3450

{client.dbus_object_path:

3451

dbus.Dictionary(

3452

{interface: client.GetAll(interface)

3453

for interface in

3454

client._get_all_interface_names()})

3455

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

3456

3457

def client_added_signal(self, client):

3458

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

3459

if use_dbus:

3460

# New standard signal

3461

self.InterfacesAdded(

3462

client.dbus_object_path,

3463

dbus.Dictionary(

3464

{interface: client.GetAll(interface)

3465

for interface in

3466

client._get_all_interface_names()}))

3467

# Old signal

3468

self.ClientAdded(client.dbus_object_path)

3469

3470

def client_removed_signal(self, client):

3471

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

3472

if use_dbus:

3473

# New standard signal

3474

self.InterfacesRemoved(

3475

client.dbus_object_path,

3476

client._get_all_interface_names())

3477

# Old signal

3478

self.ClientRemoved(client.dbus_object_path,

3479

client.name)

3480

2756

3481

mandos_dbus_service = MandosDBusService()

2757

3482

3483

# Save modules to variables to exempt the modules from being

3484

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

3485

mp = multiprocessing

3486

wn = wnull

3487

2758

3488

def cleanup():

2759

3489

"Cleanup function; run on exit"

2760

3490

if zeroconf:

2761

3491

service.cleanup()

2762

2763

multiprocessing.active_children()

2764

wnull.close()

3492

3493

mp.active_children()

3494

wn.close()

2765

3495

if not (tcp_server.clients or client_settings):

2766

3496

return

2767

3497

2768

3498

# Store client before exiting. Secrets are encrypted with key

2769

3499

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

2770

3500

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

2771

3501

clients = {}

2772

3502

with PGPEngine() as pgp:

2773

for client in tcp_server.clients.itervalues():

3503

for client in tcp_server.clients.values():

2774

3504

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

2775

3505

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

2776

3506

key)

2777

3507

client_dict = {}

2778

3508

2779

3509

# A list of attributes that can not be pickled

2780

3510

# + secret.

2781

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

2782

"checker", "server_settings" }

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

3511

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

3512

"checker", "server_settings"}

3513

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

3514

.Object):

2785

3515

exclude.add(name)

2786

3516

2787

3517

client_dict["encrypted_secret"] = (client

2788

3518

.encrypted_secret)

2789

3519

for attr in client.client_structure:

2790

3520

if attr not in exclude:

2791

3521

client_dict[attr] = getattr(client, attr)

2792

3522

2793

3523

clients[client.name] = client_dict

2794

3524

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

2795

3525

2796

3526

try:

2797

with (tempfile.NamedTemporaryFile

2798

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

2799

dir=os.path.dirname(stored_state_path),

2800

delete=False)) as stored_state:

2801

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

2802

tempname=stored_state.name

3527

with tempfile.NamedTemporaryFile(

3528

mode='wb',

3529

suffix=".pickle",

3530

prefix='clients-',

3531

dir=os.path.dirname(stored_state_path),

3532

delete=False) as stored_state:

3533

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

3534

protocol=2)

3535

tempname = stored_state.name

2803

3536

os.rename(tempname, stored_state_path)

2804

3537

except (IOError, OSError) as e:

2805

3538

if not debug:

2814

3547

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

2815

3548

exc_info=e)

2816

3549

raise

2817

3550

2818

3551

# Delete all clients, and settings from config

2819

3552

while tcp_server.clients:

2820

3553

name, client = tcp_server.clients.popitem()

2821

3554

if use_dbus:

2822

3555

client.remove_from_connection()

2823

# Don't signal anything except ClientRemoved

3556

# Don't signal the disabling

2824

3557

client.disable(quiet=True)

3558

# Emit D-Bus signal for removal

2825

3559

if use_dbus:

2826

# Emit D-Bus signal

2827

mandos_dbus_service.ClientRemoved(client

2828

.dbus_object_path,

2829

client.name)

3560

mandos_dbus_service.client_removed_signal(client)

2830

3561

client_settings.clear()

2831

3562

2832

3563

atexit.register(cleanup)

2833

2834

for client in tcp_server.clients.itervalues():

3564

3565

for client in tcp_server.clients.values():

2835

3566

if use_dbus:

2836

# Emit D-Bus signal

2837

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3567

# Emit D-Bus signal for adding

3568

mandos_dbus_service.client_added_signal(client)

2838

3569

# Need to initiate checking of clients

2839

3570

if client.enabled:

2840

3571

client.init_checker()

2841

3572

2842

3573

tcp_server.enable()

2843

3574

tcp_server.server_activate()

2844

3575

2845

3576

# Find out what port we got

2846

3577

if zeroconf:

2847

3578

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

2852

3583

else: # IPv4

2853

3584

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

2854

3585

*tcp_server.socket.getsockname())

2855

2856

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

2857

3586

3587

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

3588

2858

3589

try:

2859

3590

if zeroconf:

2860

3591

# From the Avahi example code

2865

3596

cleanup()

2866

3597

sys.exit(1)

2867

3598

# End of Avahi example code

2868

2869

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

2870

lambda *args, **kwargs:

2871

(tcp_server.handle_request

2872

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

2873

3599

3600

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

3601

lambda *args, **kwargs:

3602

(tcp_server.handle_request

3603

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

3604

2874

3605

logger.debug("Starting main loop")

2875

3606

main_loop.run()

2876

3607

except AvahiError as error:

2885

3616

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

2886

3617

cleanup()

2887

3618

3619

2888

3620

if __name__ == '__main__':

2889

3621

main()