/mandos/release : revision 237.7.333

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#!/usr/bin/python3 -bI

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# -*- coding: utf-8; lexical-binding: t -*-

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#

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#!/usr/bin/python2.7

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

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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 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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15

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#

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

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

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

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# (at your option) any later version.

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#

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

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#

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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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# 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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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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import sys

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import unittest

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import argparse

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import logging

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import os

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39

try:

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import SocketServer as socketserver

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except ImportError:

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42

import socketserver

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import socket

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import argparse

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import datetime

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46

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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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 signal

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import subprocess

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import atexit

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import stat

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import logging

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import logging.handlers

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import pwd

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import contextlib

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import itertools

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import collections

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import codecs

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import random

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import shlex

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import dbus

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import dbus.service

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import gi

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from gi.repository import GLib

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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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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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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input = raw_input

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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

117

118

# 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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try:

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

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# Try running the C preprocessor:

131

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 < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.16"

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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109

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log = logging.getLogger(os.path.basename(sys.argv[0]))

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logging.captureWarnings(True) # Show warnings via the logging system

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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")).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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184

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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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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log.addHandler(syslogger)

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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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196

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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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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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log.addHandler(console)

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log.setLevel(level)

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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148

205

149

206

150

class PGPError(Exception):

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pass

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class PGPEngine:

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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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159

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():

220

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

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if name == b"gpg":

222

self.gpg = path

223

break

224

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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"--homedir", self.tempdir,

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"--force-mdc",

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

233

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

234

160

self.gnupgargs = ['--batch',

161

'--home', self.tempdir,

162

'--force-mdc',

163

'--quiet',

164

'--no-use-agent']

165

235

166

def __enter__(self):

236

167

return self

237

168

238

169

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

239

170

self._cleanup()

240

171

return False

241

172

242

173

def __del__(self):

243

174

self._cleanup()

244

175

245

176

def _cleanup(self):

246

177

if self.tempdir is not None:

247

178

# Delete contents of tempdir

248

179

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

249

topdown=False):

180

topdown = False):

250

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for filename in files:

251

182

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

252

183

for dirname in dirs:

254

185

# Remove tempdir

255

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os.rmdir(self.tempdir)

256

187

self.tempdir = None

257

188

258

189

def password_encode(self, password):

259

190

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

260

191

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

265

196

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

266

197

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

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198

return encoded

268

199

269

200

def encrypt(self, data, password):

270

201

passphrase = self.password_encode(password)

271

202

with tempfile.NamedTemporaryFile(

272

203

dir=self.tempdir) as passfile:

273

204

passfile.write(passphrase)

274

205

passfile.flush()

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

276

"--passphrase-file",

206

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

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'--passphrase-file',

277

208

passfile.name]

278

209

+ self.gnupgargs,

279

stdin=subprocess.PIPE,

280

stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

282

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

210

stdin = subprocess.PIPE,

211

stdout = subprocess.PIPE,

212

stderr = subprocess.PIPE)

213

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

283

214

if proc.returncode != 0:

284

215

raise PGPError(err)

285

216

return ciphertext

286

217

287

218

def decrypt(self, data, password):

288

219

passphrase = self.password_encode(password)

289

220

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

221

dir = self.tempdir) as passfile:

291

222

passfile.write(passphrase)

292

223

passfile.flush()

293

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

294

"--passphrase-file",

224

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

225

'--passphrase-file',

295

226

passfile.name]

296

227

+ self.gnupgargs,

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

228

stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

301

232

if proc.returncode != 0:

302

233

raise PGPError(err)

303

234

return decrypted_plaintext

304

235

305

236

306

# Pretend that we have an Avahi module

307

class avahi:

308

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

309

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

310

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

311

PROTO_INET = 0 # avahi-common/address.h

312

PROTO_INET6 = 1 # avahi-common/address.h

313

DBUS_NAME = "org.freedesktop.Avahi"

314

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

315

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

316

DBUS_PATH_SERVER = "/"

317

318

@staticmethod

319

def string_array_to_txt_array(t):

320

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

321

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

322

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

323

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

324

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

325

SERVER_INVALID = 0 # avahi-common/defs.h

326

SERVER_REGISTERING = 1 # avahi-common/defs.h

327

SERVER_RUNNING = 2 # avahi-common/defs.h

328

SERVER_COLLISION = 3 # avahi-common/defs.h

329

SERVER_FAILURE = 4 # avahi-common/defs.h

330

331

332

237

class AvahiError(Exception):

333

238

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

334

239

self.value = value

344

249

pass

345

250

346

251

347

class AvahiService:

252

class AvahiService(object):

348

253

"""An Avahi (Zeroconf) service.

349

254

350

255

Attributes:

351

256

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

352

257

Used to optionally bind to the specified interface.

353

name: string; Example: "Mandos"

354

type: string; Example: "_mandos._tcp".

258

name: string; Example: 'Mandos'

259

type: string; Example: '_mandos._tcp'.

355

260

See <https://www.iana.org/assignments/service-names-port-numbers>

356

261

port: integer; what port to announce

357

262

TXT: list of strings; TXT record for the service

364

269

server: D-Bus Server

365

270

bus: dbus.SystemBus()

366

271

"""

367

272

368

273

def __init__(self,

369

interface=avahi.IF_UNSPEC,

370

name=None,

371

servicetype=None,

372

port=None,

373

TXT=None,

374

domain="",

375

host="",

376

max_renames=32768,

377

protocol=avahi.PROTO_UNSPEC,

378

bus=None):

274

interface = avahi.IF_UNSPEC,

275

name = None,

276

servicetype = None,

277

port = None,

278

TXT = None,

279

domain = "",

280

host = "",

281

max_renames = 32768,

282

protocol = avahi.PROTO_UNSPEC,

283

bus = None):

379

284

self.interface = interface

380

285

self.name = name

381

286

self.type = servicetype

390

295

self.server = None

391

296

self.bus = bus

392

297

self.entry_group_state_changed_match = None

393

298

394

299

def rename(self, remove=True):

395

300

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

396

301

if self.rename_count >= self.max_renames:

397

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

398

" after %i retries, exiting.",

399

self.rename_count)

302

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

303

" after %i retries, exiting.",

304

self.rename_count)

400

305

raise AvahiServiceError("Too many renames")

401

306

self.name = str(

402

307

self.server.GetAlternativeServiceName(self.name))

403

308

self.rename_count += 1

404

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

405

self.name)

309

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

310

self.name)

406

311

if remove:

407

312

self.remove()

408

313

try:

410

315

except dbus.exceptions.DBusException as error:

411

316

if (error.get_dbus_name()

412

317

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

413

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

318

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

414

319

return self.rename(remove=False)

415

320

else:

416

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

321

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

417

322

self.cleanup()

418

323

os._exit(1)

419

324

420

325

def remove(self):

421

326

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

422

327

if self.entry_group_state_changed_match is not None:

424

329

self.entry_group_state_changed_match = None

425

330

if self.group is not None:

426

331

self.group.Reset()

427

332

428

333

def add(self):

429

334

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

430

335

self.remove()

435

340

avahi.DBUS_INTERFACE_ENTRY_GROUP)

436

341

self.entry_group_state_changed_match = (

437

342

self.group.connect_to_signal(

438

"StateChanged", self.entry_group_state_changed))

439

log.debug("Adding Zeroconf service '%s' of type '%s' ...",

440

self.name, self.type)

343

'StateChanged', self.entry_group_state_changed))

344

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

345

self.name, self.type)

441

346

self.group.AddService(

442

347

self.interface,

443

348

self.protocol,

447

352

dbus.UInt16(self.port),

448

353

avahi.string_array_to_txt_array(self.TXT))

449

354

self.group.Commit()

450

355

451

356

def entry_group_state_changed(self, state, error):

452

357

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

453

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

454

358

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

359

455

360

if state == avahi.ENTRY_GROUP_ESTABLISHED:

456

log.debug("Zeroconf service established.")

361

logger.debug("Zeroconf service established.")

457

362

elif state == avahi.ENTRY_GROUP_COLLISION:

458

log.info("Zeroconf service name collision.")

363

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

459

364

self.rename()

460

365

elif state == avahi.ENTRY_GROUP_FAILURE:

461

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

462

str(error))

366

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

367

str(error))

463

368

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

464

369

465

370

def cleanup(self):

466

371

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

467

372

if self.group is not None:

472

377

pass

473

378

self.group = None

474

379

self.remove()

475

380

476

381

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

477

382

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

478

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

383

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

479

384

bad_states = {

480

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

481

386

avahi.SERVER_REGISTERING: None,

485

390

if state in bad_states:

486

391

if bad_states[state] is not None:

487

392

if error is None:

488

log.error(bad_states[state])

393

logger.error(bad_states[state])

489

394

else:

490

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

395

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

491

396

self.cleanup()

492

397

elif state == avahi.SERVER_RUNNING:

493

398

try:

495

400

except dbus.exceptions.DBusException as error:

496

401

if (error.get_dbus_name()

497

402

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

498

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

499

405

return self.rename(remove=False)

500

406

else:

501

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

407

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

502

408

self.cleanup()

503

409

os._exit(1)

504

410

else:

505

411

if error is None:

506

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

412

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

507

413

else:

508

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

509

414

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

415

510

416

def activate(self):

511

417

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

512

418

if self.server is None:

523

429

class AvahiServiceToSyslog(AvahiService):

524

430

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

525

431

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

526

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

527

**kwargs)

432

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

528

433

syslogger.setFormatter(logging.Formatter(

529

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

434

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

530

435

.format(self.name)))

531

436

return ret

532

437

533

534

# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

537

538

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

539

if library is None:

540

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

541

_library = ctypes.cdll.LoadLibrary(library)

542

del library

543

544

# Unless otherwise indicated, the constants and types below are

545

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

546

547

# Constants

548

E_SUCCESS = 0

549

E_INTERRUPTED = -52

550

E_AGAIN = -28

551

CRT_OPENPGP = 2

552

CRT_RAWPK = 3

553

CLIENT = 2

554

SHUT_RDWR = 0

555

CRD_CERTIFICATE = 1

556

E_NO_CERTIFICATE_FOUND = -49

557

X509_FMT_DER = 0

558

NO_TICKETS = 1<<10

559

ENABLE_RAWPK = 1<<18

560

CTYPE_PEERS = 3

561

KEYID_USE_SHA256 = 1 # gnutls/x509.h

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

564

# Types

565

class _session_int(ctypes.Structure):

566

_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

568

569

class certificate_credentials_st(ctypes.Structure):

570

_fields_ = []

571

certificate_credentials_t = ctypes.POINTER(

572

certificate_credentials_st)

573

certificate_type_t = ctypes.c_int

574

575

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

578

579

class _openpgp_crt_int(ctypes.Structure):

580

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

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

584

credentials_type_t = ctypes.c_int

585

transport_ptr_t = ctypes.c_void_p

586

close_request_t = ctypes.c_int

587

588

# Exceptions

589

class Error(Exception):

590

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

591

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

592

# code is passed, convert it to a string with

593

# gnutls.strerror()

594

self.code = code

595

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

"utf-8", errors="replace")

598

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

599

message, *args)

600

601

class CertificateSecurityError(Error):

602

pass

603

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

raise TypeError("Not of type {}: {!r}"

611

.format(self.cls.__name__, obj))

612

return ctypes.byref(obj.from_param(obj))

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

raise TypeError("Not of type {}: {!r}"

621

.format(self.cls.__name__, obj))

622

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

629

# Classes

630

class Credentials(With_from_param):

631

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

634

self.type = gnutls.CRD_CERTIFICATE

635

636

def __del__(self):

637

gnutls.certificate_free_credentials(self)

638

639

class ClientSession(With_from_param):

640

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

641

self._as_parameter_ = gnutls.session_t()

642

gnutls_flags = gnutls.CLIENT

643

if gnutls.check_version(b"3.5.6"):

644

gnutls_flags |= gnutls.NO_TICKETS

645

if gnutls.has_rawpk:

646

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

648

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

652

self.socket = socket

653

if credentials is None:

654

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

657

self.credentials = credentials

658

659

def __del__(self):

660

gnutls.deinit(self)

661

662

def handshake(self):

663

return gnutls.handshake(self)

664

665

def send(self, data):

666

data = bytes(data)

667

data_len = len(data)

668

while data_len > 0:

669

data_len -= gnutls.record_send(self, data[-data_len:],

670

data_len)

671

672

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

674

675

# Error handling functions

676

def _error_code(result):

677

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

678

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

679

if result >= gnutls.E_SUCCESS:

680

return result

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

raise gnutls.CertificateSecurityError(code=result)

683

raise gnutls.Error(code=result)

684

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

687

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

688

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

689

while result < gnutls.E_SUCCESS:

690

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

691

return _error_code(result)

692

result = func(*arguments)

693

return result

694

695

# Unless otherwise indicated, the function declarations below are

696

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

697

698

# Functions

699

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

701

ctypes.POINTER(ctypes.c_char_p)]

702

priority_set_direct.restype = _error_code

703

704

init = _library.gnutls_init

705

init.argtypes = [PointerTo(ClientSession), ctypes.c_int]

706

init.restype = _error_code

707

708

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

710

set_default_priority.restype = _error_code

711

712

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

714

ctypes.c_size_t]

715

record_send.restype = ctypes.c_ssize_t

716

record_send.errcheck = _retry_on_error

717

718

certificate_allocate_credentials = (

719

_library.gnutls_certificate_allocate_credentials)

720

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

722

certificate_allocate_credentials.restype = _error_code

723

724

certificate_free_credentials = (

725

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

727

certificate_free_credentials.restype = None

728

729

handshake_set_private_extensions = (

730

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

732

ctypes.c_int]

733

handshake_set_private_extensions.restype = None

734

735

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

738

credentials_set.restype = _error_code

739

740

strerror = _library.gnutls_strerror

741

strerror.argtypes = [ctypes.c_int]

742

strerror.restype = ctypes.c_char_p

743

744

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

746

certificate_type_get.restype = _error_code

747

748

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

750

ctypes.POINTER(ctypes.c_uint)]

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

753

global_set_log_level = _library.gnutls_global_set_log_level

754

global_set_log_level.argtypes = [ctypes.c_int]

755

global_set_log_level.restype = None

756

757

global_set_log_function = _library.gnutls_global_set_log_function

758

global_set_log_function.argtypes = [log_func]

759

global_set_log_function.restype = None

760

761

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

763

deinit.restype = None

764

765

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

768

handshake.errcheck = _retry_on_error

769

770

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

772

transport_set_ptr.restype = None

773

774

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

777

bye.errcheck = _retry_on_error

778

779

check_version = _library.gnutls_check_version

780

check_version.argtypes = [ctypes.c_char_p]

781

check_version.restype = ctypes.c_char_p

782

783

_need_version = b"3.3.0"

784

if check_version(_need_version) is None:

785

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

786

.format(_need_version))

787

788

_tls_rawpk_version = b"3.6.6"

789

has_rawpk = bool(check_version(_tls_rawpk_version))

790

791

if has_rawpk:

792

# Types

793

class pubkey_st(ctypes.Structure):

794

_fields = []

795

pubkey_t = ctypes.POINTER(pubkey_st)

796

797

x509_crt_fmt_t = ctypes.c_int

798

799

# All the function declarations below are from

800

# gnutls/abstract.h

801

pubkey_init = _library.gnutls_pubkey_init

802

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

803

pubkey_init.restype = _error_code

804

805

pubkey_import = _library.gnutls_pubkey_import

806

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

807

x509_crt_fmt_t]

808

pubkey_import.restype = _error_code

809

810

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

811

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

812

ctypes.POINTER(ctypes.c_ubyte),

813

ctypes.POINTER(ctypes.c_size_t)]

814

pubkey_get_key_id.restype = _error_code

815

816

pubkey_deinit = _library.gnutls_pubkey_deinit

817

pubkey_deinit.argtypes = [pubkey_t]

818

pubkey_deinit.restype = None

819

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

822

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

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

825

openpgp_crt_init.restype = _error_code

826

827

openpgp_crt_import = _library.gnutls_openpgp_crt_import

828

openpgp_crt_import.argtypes = [openpgp_crt_t,

829

ctypes.POINTER(datum_t),

830

openpgp_crt_fmt_t]

831

openpgp_crt_import.restype = _error_code

832

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

840

openpgp_crt_verify_self.restype = _error_code

841

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

843

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

844

openpgp_crt_deinit.restype = None

845

846

openpgp_crt_get_fingerprint = (

847

_library.gnutls_openpgp_crt_get_fingerprint)

848

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

849

ctypes.c_void_p,

850

ctypes.POINTER(

851

ctypes.c_size_t)]

852

openpgp_crt_get_fingerprint.restype = _error_code

853

854

if check_version(b"3.6.4"):

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

857

certificate_type_get2.restype = _error_code

858

859

# Remove non-public functions

860

del _error_code, _retry_on_error

861

862

863

438

def call_pipe(connection, # : multiprocessing.Connection

864

439

func, *args, **kwargs):

865

440

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

866

441

867

442

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

868

443

return value on the provided multiprocessing.Connection.

869

444

"""

870

445

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

871

446

connection.close()

872

447

873

874

class Client:

448

class Client(object):

875

449

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

876

450

877

451

Attributes:

878

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

452

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

879

453

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

880

454

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

881

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

882

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

883

running.

884

checker_callback_tag: a GLib event source tag, or None

455

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

456

to see if the client lives.

457

'None' if no process is running.

458

checker_callback_tag: a gobject event source tag, or None

885

459

checker_command: string; External command which is run to check

886

460

if client lives. %() expansions are done at

887

461

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

888

462

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

889

checker_initiator_tag: a GLib event source tag, or None

463

checker_initiator_tag: a gobject event source tag, or None

890

464

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

891

465

client_structure: Object describing what attributes a client has

892

466

and is used for storing the client at exit

893

467

current_checker_command: string; current running checker_command

894

disable_initiator_tag: a GLib event source tag, or None

468

disable_initiator_tag: a gobject event source tag, or None

895

469

enabled: bool()

896

470

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

897

uniquely identify an OpenPGP client

898

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

899

a client using raw public keys

471

uniquely identify the client

900

472

host: string; available for use by the checker command

901

473

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

902

474

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

918

490

disabled, or None

919

491

server_settings: The server_settings dict from main()

920

492

"""

921

493

922

494

runtime_expansions = ("approval_delay", "approval_duration",

923

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

495

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

924

496

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

925

497

"last_approval_request", "last_checked_ok",

926

498

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

935

507

"approved_by_default": "True",

936

508

"enabled": "True",

937

509

}

938

510

939

511

@staticmethod

940

512

def config_parser(config):

941

513

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

948

520

for client_name in config.sections():

949

521

section = dict(config.items(client_name))

950

522

client = settings[client_name] = {}

951

523

952

524

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

953

525

# Reformat values from string types to Python types

954

526

client["approved_by_default"] = config.getboolean(

955

527

client_name, "approved_by_default")

956

528

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

957

529

"enabled")

958

959

# Uppercase and remove spaces from key_id and fingerprint

960

# for later comparison purposes with return value from the

961

# key_id() and fingerprint() functions

962

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

963

.replace(" ", ""))

964

client["fingerprint"] = (section.get("fingerprint",

965

"").upper()

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

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

966

535

.replace(" ", ""))

967

if not (client["key_id"] or client["fingerprint"]):

968

log.error("Skipping client %s without key_id or"

969

" fingerprint", client_name)

970

del settings[client_name]

971

continue

972

536

if "secret" in section:

973

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

974

.encode("utf-8"),

975

"base64")

537

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

976

538

elif "secfile" in section:

977

539

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

978

540

(section["secfile"])),

993

555

client["last_approval_request"] = None

994

556

client["last_checked_ok"] = None

995

557

client["last_checker_status"] = -2

996

558

997

559

return settings

998

999

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

560

561

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

1000

562

self.name = name

1001

563

if server_settings is None:

1002

564

server_settings = {}

1004

566

# adding all client settings

1005

567

for setting, value in settings.items():

1006

568

setattr(self, setting, value)

1007

569

1008

570

if self.enabled:

1009

571

if not hasattr(self, "last_enabled"):

1010

572

self.last_enabled = datetime.datetime.utcnow()

1014

576

else:

1015

577

self.last_enabled = None

1016

578

self.expires = None

1017

1018

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

1019

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

1020

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

579

580

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

581

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

1021

582

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

1022

583

datetime.datetime.utcnow())

1023

584

1024

585

# attributes specific for this server instance

1025

586

self.checker = None

1026

587

self.checker_initiator_tag = None

1032

593

self.changedstate = multiprocessing_manager.Condition(

1033

594

multiprocessing_manager.Lock())

1034

595

self.client_structure = [attr

1035

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

1036

597

if not attr.startswith("_")]

1037

598

self.client_structure.append("client_structure")

1038

599

1039

600

for name, t in inspect.getmembers(

1040

601

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

1041

602

if not name.startswith("_"):

1042

603

self.client_structure.append(name)

1043

604

1044

605

# Send notice to process children that client state has changed

1045

606

def send_changedstate(self):

1046

607

with self.changedstate:

1047

608

self.changedstate.notify_all()

1048

609

1049

610

def enable(self):

1050

611

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

1051

612

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

1052

613

# Already enabled

1053

614

return

615

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

1054

616

self.enabled = True

1055

617

self.last_enabled = datetime.datetime.utcnow()

1056

618

self.init_checker()

1057

619

self.send_changedstate()

1058

620

1059

621

def disable(self, quiet=True):

1060

622

"""Disable this client."""

1061

623

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

1062

624

return False

1063

625

if not quiet:

1064

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

626

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

1065

627

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

1066

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

1067

629

self.disable_initiator_tag = None

1068

630

self.expires = None

1069

631

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

1070

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

1071

633

self.checker_initiator_tag = None

1072

634

self.stop_checker()

1073

635

self.enabled = False

1074

636

if not quiet:

1075

637

self.send_changedstate()

1076

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

638

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

1077

639

return False

1078

640

1079

641

def __del__(self):

1080

642

self.disable()

1081

1082

def init_checker(self, randomize_start=False):

1083

# Schedule a new checker to be started a randomly selected

1084

# time (a fraction of 'interval') from now. This spreads out

1085

# the startup of checkers over time when the server is

1086

# started.

643

644

def init_checker(self):

645

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

646

# and every interval from then on.

1087

647

if self.checker_initiator_tag is not None:

1088

GLib.source_remove(self.checker_initiator_tag)

1089

interval_milliseconds = int(self.interval.total_seconds()

1090

* 1000)

1091

if randomize_start:

1092

delay_milliseconds = random.randrange(

1093

interval_milliseconds + 1)

1094

else:

1095

delay_milliseconds = interval_milliseconds

1096

self.checker_initiator_tag = GLib.timeout_add(

1097

delay_milliseconds, self.start_checker, randomize_start)

1098

delay = datetime.timedelta(0, 0, 0, delay_milliseconds)

1099

# A checker might take up to an 'interval' of time, so we can

1100

# expire at the soonest one interval after a checker was

1101

# started. Since the initial checker is delayed, the expire

1102

# time might have to be extended.

1103

now = datetime.datetime.utcnow()

1104

self.expires = now + delay + self.interval

1105

# Schedule a disable() at expire time

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

652

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

1106

653

if self.disable_initiator_tag is not None:

1107

GLib.source_remove(self.disable_initiator_tag)

1108

self.disable_initiator_tag = GLib.timeout_add(

1109

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

1110

self.disable)

1111

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

657

# Also start a new checker *right now*.

658

self.start_checker()

659

1112

660

def checker_callback(self, source, condition, connection,

1113

661

command):

1114

662

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

663

self.checker_callback_tag = None

664

self.checker = None

1115

665

# Read return code from connection (see call_pipe)

1116

666

returncode = connection.recv()

1117

667

connection.close()

1118

if self.checker is not None:

1119

self.checker.join()

1120

self.checker_callback_tag = None

1121

self.checker = None

1122

668

1123

669

if returncode >= 0:

1124

670

self.last_checker_status = returncode

1125

671

self.last_checker_signal = None

1126

672

if self.last_checker_status == 0:

1127

log.info("Checker for %(name)s succeeded", vars(self))

673

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

674

vars(self))

1128

675

self.checked_ok()

1129

676

else:

1130

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

677

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

1131

678

else:

1132

679

self.last_checker_status = -1

1133

680

self.last_checker_signal = -returncode

1134

log.warning("Checker for %(name)s crashed?", vars(self))

681

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

682

vars(self))

1135

683

return False

1136

684

1137

685

def checked_ok(self):

1138

686

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

1139

687

self.last_checked_ok = datetime.datetime.utcnow()

1140

688

self.last_checker_status = 0

1141

689

self.last_checker_signal = None

1142

690

self.bump_timeout()

1143

691

1144

692

def bump_timeout(self, timeout=None):

1145

693

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

1146

694

if timeout is None:

1147

695

timeout = self.timeout

1148

696

if self.disable_initiator_tag is not None:

1149

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

1150

698

self.disable_initiator_tag = None

1151

699

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

1152

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1153

701

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

1154

702

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

1155

703

1156

704

def need_approval(self):

1157

705

self.last_approval_request = datetime.datetime.utcnow()

1158

1159

def start_checker(self, start_was_randomized=False):

706

707

def start_checker(self):

1160

708

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

1161

709

1162

710

If a checker already exists, leave it running and do

1163

711

nothing."""

1164

712

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

1169

717

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

1170

718

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

1171

719

# should be.

1172

720

1173

721

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

1174

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

722

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

1175

723

self.checker.join()

1176

724

self.checker = None

1177

725

# Start a new checker if needed

1178

726

if self.checker is None:

1179

727

# Escape attributes for the shell

1180

728

escaped_attrs = {

1181

attr: shlex.quote(str(getattr(self, attr)))

1182

for attr in self.runtime_expansions}

729

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

730

for attr in self.runtime_expansions }

1183

731

try:

1184

732

command = self.checker_command % escaped_attrs

1185

733

except TypeError as error:

1186

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

1187

self.checker_command, exc_info=error)

734

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

735

self.checker_command,

736

exc_info=error)

1188

737

return True # Try again later

1189

738

self.current_checker_command = command

1190

log.info("Starting checker %r for %s", command, self.name)

739

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

740

self.name)

1191

741

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

1192

742

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

1193

743

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

1195

745

# The exception is when not debugging but nevertheless

1196

746

# running in the foreground; use the previously

1197

747

# created wnull.

1198

popen_args = {"close_fds": True,

1199

"shell": True,

1200

"cwd": "/"}

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1201

751

if (not self.server_settings["debug"]

1202

752

and self.server_settings["foreground"]):

1203

753

popen_args.update({"stdout": wnull,

1204

"stderr": wnull})

1205

pipe = multiprocessing.Pipe(duplex=False)

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1206

756

self.checker = multiprocessing.Process(

1207

target=call_pipe,

1208

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

1209

kwargs=popen_args)

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1210

760

self.checker.start()

1211

self.checker_callback_tag = GLib.io_add_watch(

1212

GLib.IOChannel.unix_new(pipe[0].fileno()),

1213

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1214

763

self.checker_callback, pipe[0], command)

1215

if start_was_randomized:

1216

# We were started after a random delay; Schedule a new

1217

# checker to be started an 'interval' from now, and every

1218

# interval from then on.

1219

now = datetime.datetime.utcnow()

1220

self.checker_initiator_tag = GLib.timeout_add(

1221

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

1222

self.start_checker)

1223

self.expires = max(self.expires, now + self.interval)

1224

# Don't start a new checker again after same random delay

1225

return False

1226

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

764

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

1227

765

return True

1228

766

1229

767

def stop_checker(self):

1230

768

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

1231

769

if self.checker_callback_tag:

1232

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1233

771

self.checker_callback_tag = None

1234

772

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

1235

773

return

1236

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

774

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

1237

775

self.checker.terminate()

1238

776

self.checker = None

1239

777

1244

782

byte_arrays=False):

1245

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1246

784

become properties on the D-Bus.

1247

785

1248

786

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

1249

787

and with one argument by "Set".

1250

788

1251

789

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

1252

790

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

1253

791

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

1257

795

if byte_arrays and signature != "ay":

1258

796

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

1259

797

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

1260

798

1261

799

def decorator(func):

1262

800

func._dbus_is_property = True

1263

801

func._dbus_interface = dbus_interface

1266

804

func._dbus_name = func.__name__

1267

805

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

1268

806

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

1269

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1270

808

return func

1271

809

1272

810

return decorator

1273

811

1274

812

1275

813

def dbus_interface_annotations(dbus_interface):

1276

814

"""Decorator for marking functions returning interface annotations

1277

815

1278

816

Usage:

1279

817

1280

818

@dbus_interface_annotations("org.example.Interface")

1281

819

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

1282

820

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

1283

821

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

1284

822

"false"}

1285

823

"""

1286

824

1287

825

def decorator(func):

1288

826

func._dbus_is_interface = True

1289

827

func._dbus_interface = dbus_interface

1290

828

func._dbus_name = dbus_interface

1291

829

return func

1292

830

1293

831

return decorator

1294

832

1295

833

1296

834

def dbus_annotations(annotations):

1297

835

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

1298

836

Usage:

1299

837

1300

838

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

1301

839

"org.freedesktop.DBus.Property."

1302

840

"EmitsChangedSignal": "false"})

1304

842

access="r")

1305

843

def Property_dbus_property(self):

1306

844

return dbus.Boolean(False)

1307

845

1308

846

See also the DBusObjectWithAnnotations class.

1309

847

"""

1310

848

1311

849

def decorator(func):

1312

850

func._dbus_annotations = annotations

1313

851

return func

1314

852

1315

853

return decorator

1316

854

1317

855

1335

873

1336

874

class DBusObjectWithAnnotations(dbus.service.Object):

1337

875

"""A D-Bus object with annotations.

1338

876

1339

877

Classes inheriting from this can use the dbus_annotations

1340

878

decorator to add annotations to methods or signals.

1341

879

"""

1342

880

1343

881

@staticmethod

1344

882

def _is_dbus_thing(thing):

1345

883

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

1346

884

1347

885

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

1348

886

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

1349

887

"""

1350

888

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

1351

889

False)

1352

890

1353

891

def _get_all_dbus_things(self, thing):

1354

892

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

1355

893

"""

1358

896

for cls in self.__class__.__mro__

1359

897

for name, athing in

1360

898

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

1361

899

1362

900

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

out_signature="s",

1364

path_keyword="object_path",

1365

connection_keyword="connection")

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

1366

904

def Introspect(self, object_path, connection):

1367

905

"""Overloading of standard D-Bus method.

1368

906

1369

907

Inserts annotation tags on methods and signals.

1370

908

"""

1371

909

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

1372

910

connection)

1373

911

try:

1374

912

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

1375

913

1376

914

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

1377

915

# Add annotation tags

1378

916

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

1405

943

if_tag.appendChild(ann_tag)

1406

944

# Fix argument name for the Introspect method itself

1407

945

if (if_tag.getAttribute("name")

1408

== dbus.INTROSPECTABLE_IFACE):

946

== dbus.INTROSPECTABLE_IFACE):

1409

947

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

1410

948

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

1411

949

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

1417

955

document.unlink()

1418

956

except (AttributeError, xml.dom.DOMException,

1419

957

xml.parsers.expat.ExpatError) as error:

1420

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

1421

exc_info=error)

958

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

959

exc_info=error)

1422

960

return xmlstring

1423

961

1424

962

1425

963

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1426

964

"""A D-Bus object with properties.

1427

965

1428

966

Classes inheriting from this can use the dbus_service_property

1429

967

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

1430

968

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

1431

969

"""

1432

970

1433

971

def _get_dbus_property(self, interface_name, property_name):

1434

972

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

1435

973

property with the specified name and interface.

1440

978

if (value._dbus_name == property_name

1441

979

and value._dbus_interface == interface_name):

1442

980

return value.__get__(self)

1443

981

1444

982

# No such property

1445

983

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

1446

984

self.dbus_object_path, interface_name, property_name))

1447

985

1448

986

@classmethod

1449

987

def _get_all_interface_names(cls):

1450

988

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

1453

991

for x in (inspect.getmro(cls))

1454

992

for attr in dir(x))

1455

993

if name is not None)

1456

994

1457

995

@dbus.service.method(dbus.PROPERTIES_IFACE,

1458

996

in_signature="ss",

1459

997

out_signature="v")

1467

1005

if not hasattr(value, "variant_level"):

1468

1006

return value

1469

1007

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

1470

1008

1471

1009

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

1472

1010

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

1473

1011

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

1482

1020

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

1483

1021

"'ay' signature {!r}"

1484

1022

.format(prop._dbus_signature))

1485

value = dbus.ByteArray(bytes(value))

1023

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

1024

for byte in value))

1486

1025

prop(value)

1487

1026

1488

1027

@dbus.service.method(dbus.PROPERTIES_IFACE,

1489

1028

in_signature="s",

1490

1029

out_signature="a{sv}")

1491

1030

def GetAll(self, interface_name):

1492

1031

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

1493

1032

standard.

1494

1033

1495

1034

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

1496

1035

"""

1497

1036

properties = {}

1508

1047

properties[name] = value

1509

1048

continue

1510

1049

properties[name] = type(value)(

1511

value, variant_level=value.variant_level + 1)

1050

value, variant_level = value.variant_level + 1)

1512

1051

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

1513

1052

1514

1053

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

1515

1054

def PropertiesChanged(self, interface_name, changed_properties,

1516

1055

invalidated_properties):

1518

1057

standard.

1519

1058

"""

1520

1059

pass

1521

1060

1522

1061

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1523

1062

out_signature="s",

1524

path_keyword="object_path",

1525

connection_keyword="connection")

1063

path_keyword='object_path',

1064

connection_keyword='connection')

1526

1065

def Introspect(self, object_path, connection):

1527

1066

"""Overloading of standard D-Bus method.

1528

1067

1529

1068

Inserts property tags and interface annotation tags.

1530

1069

"""

1531

1070

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1533

1072

connection)

1534

1073

try:

1535

1074

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

1536

1075

1537

1076

def make_tag(document, name, prop):

1538

1077

e = document.createElement("property")

1539

1078

e.setAttribute("name", name)

1540

1079

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

1541

1080

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

1542

1081

return e

1543

1082

1544

1083

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

1545

1084

# Add property tags

1546

1085

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

1584

1123

document.unlink()

1585

1124

except (AttributeError, xml.dom.DOMException,

1586

1125

xml.parsers.expat.ExpatError) as error:

1587

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

1588

exc_info=error)

1126

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

1127

exc_info=error)

1589

1128

return xmlstring

1590

1129

1591

1592

1130

try:

1593

1131

dbus.OBJECT_MANAGER_IFACE

1594

1132

except AttributeError:

1595

1133

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

1596

1134

1597

1598

1135

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1599

1136

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

1600

1137

1601

1138

Classes inheriting from this exposes the standard

1602

1139

GetManagedObjects call and the InterfacesAdded and

1603

1140

InterfacesRemoved signals on the standard

1604

1141

"org.freedesktop.DBus.ObjectManager" interface.

1605

1142

1606

1143

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

1607

1144

manually.

1608

1145

"""

1609

1146

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1610

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

1147

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

1611

1148

def GetManagedObjects(self):

1612

1149

"""This function must be overridden"""

1613

1150

raise NotImplementedError()

1614

1151

1615

1152

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1616

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

1153

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

1617

1154

def InterfacesAdded(self, object_path, interfaces_and_properties):

1618

1155

pass

1619

1620

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

1156

1157

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1158

signature = "oas")

1621

1159

def InterfacesRemoved(self, object_path, interfaces):

1622

1160

pass

1623

1161

1624

1162

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1625

out_signature="s",

1626

path_keyword="object_path",

1627

connection_keyword="connection")

1163

out_signature = "s",

1164

path_keyword = 'object_path',

1165

connection_keyword = 'connection')

1628

1166

def Introspect(self, object_path, connection):

1629

1167

"""Overloading of standard D-Bus method.

1630

1168

1631

1169

Override return argument name of GetManagedObjects to be

1632

1170

"objpath_interfaces_and_properties"

1633

1171

"""

1634

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1635

object_path,

1636

connection)

1172

xmlstring = DBusObjectWithAnnotations(self, object_path,

1173

connection)

1637

1174

try:

1638

1175

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

1639

1176

1640

1177

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

1641

1178

# Fix argument name for the GetManagedObjects method

1642

1179

if (if_tag.getAttribute("name")

1643

== dbus.OBJECT_MANAGER_IFACE):

1180

== dbus.OBJECT_MANAGER_IFACE):

1644

1181

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

1645

1182

if (cn.getAttribute("name")

1646

1183

== "GetManagedObjects"):

1655

1192

document.unlink()

1656

1193

except (AttributeError, xml.dom.DOMException,

1657

1194

xml.parsers.expat.ExpatError) as error:

1658

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

1659

exc_info=error)

1195

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

1196

exc_info = error)

1660

1197

return xmlstring

1661

1198

1662

1663

1199

def datetime_to_dbus(dt, variant_level=0):

1664

1200

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

1665

1201

if dt is None:

1666

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

1202

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

1667

1203

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

1668

1204

1669

1205

1672

1208

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

1673

1209

interface names according to the "alt_interface_names" mapping.

1674

1210

Usage:

1675

1211

1676

1212

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

1677

1213

"net.example.AlternateInterface"})

1678

1214

class SampleDBusObject(dbus.service.Object):

1679

1215

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

1680

1216

def SampleDBusMethod():

1681

1217

pass

1682

1218

1683

1219

The above "SampleDBusMethod" on "SampleDBusObject" will be

1684

1220

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

1685

1221

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

1686

1222

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

1687

1223

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

1688

1224

1689

1225

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

1690

1226

(from DBusObjectWithProperties) and interfaces (from the

1691

1227

dbus_interface_annotations decorator).

1692

1228

"""

1693

1229

1694

1230

def wrapper(cls):

1695

1231

for orig_interface_name, alt_interface_name in (

1696

1232

alt_interface_names.items()):

1711

1247

interface_names.add(alt_interface)

1712

1248

# Is this a D-Bus signal?

1713

1249

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

1714

# Extract the original non-method undecorated

1715

# function by black magic

1716

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1717

1253

nonmethod_func = (dict(

1718

1254

zip(attribute.func_code.co_freevars,

1719

1255

attribute.__closure__))

1720

1256

["func"].cell_contents)

1721

1257

else:

1722

nonmethod_func = (dict(

1723

zip(attribute.__code__.co_freevars,

1724

attribute.__closure__))

1725

["func"].cell_contents)

1258

nonmethod_func = attribute

1726

1259

# Create a new, but exactly alike, function

1727

1260

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

1728

1261

# with the alternate D-Bus interface name

1729

new_function = copy_function(nonmethod_func)

1262

if sys.version_info.major == 2:

1263

new_function = types.FunctionType(

1264

nonmethod_func.func_code,

1265

nonmethod_func.func_globals,

1266

nonmethod_func.func_name,

1267

nonmethod_func.func_defaults,

1268

nonmethod_func.func_closure)

1269

else:

1270

new_function = types.FunctionType(

1271

nonmethod_func.__code__,

1272

nonmethod_func.__globals__,

1273

nonmethod_func.__name__,

1274

nonmethod_func.__defaults__,

1275

nonmethod_func.__closure__)

1730

1276

new_function = (dbus.service.signal(

1731

1277

alt_interface,

1732

1278

attribute._dbus_signature)(new_function))

1736

1282

attribute._dbus_annotations)

1737

1283

except AttributeError:

1738

1284

pass

1739

1740

1285

# Define a creator of a function to call both the

1741

1286

# original and alternate functions, so both the

1742

1287

# original and alternate signals gets sent when

1745

1290

"""This function is a scope container to pass

1746

1291

func1 and func2 to the "call_both" function

1747

1292

outside of its arguments"""

1748

1749

@functools.wraps(func2)

1293

1750

1294

def call_both(*args, **kwargs):

1751

1295

"""This function will emit two D-Bus

1752

1296

signals by calling func1 and func2"""

1753

1297

func1(*args, **kwargs)

1754

1298

func2(*args, **kwargs)

1755

# Make wrapper function look like a D-Bus

1756

# signal

1757

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

1758

if name.startswith("_dbus_"):

1759

setattr(call_both, name, attr)

1760

1299

1761

1300

return call_both

1762

1301

# Create the "call_both" function and add it to

1763

1302

# the class

1773

1312

alt_interface,

1774

1313

attribute._dbus_in_signature,

1775

1314

attribute._dbus_out_signature)

1776

(copy_function(attribute)))

1315

(types.FunctionType(attribute.func_code,

1316

attribute.func_globals,

1317

attribute.func_name,

1318

attribute.func_defaults,

1319

attribute.func_closure)))

1777

1320

# Copy annotations, if any

1778

1321

try:

1779

1322

attr[attrname]._dbus_annotations = dict(

1791

1334

attribute._dbus_access,

1792

1335

attribute._dbus_get_args_options

1793

1336

["byte_arrays"])

1794

(copy_function(attribute)))

1337

(types.FunctionType(

1338

attribute.func_code,

1339

attribute.func_globals,

1340

attribute.func_name,

1341

attribute.func_defaults,

1342

attribute.func_closure)))

1795

1343

# Copy annotations, if any

1796

1344

try:

1797

1345

attr[attrname]._dbus_annotations = dict(

1806

1354

# to the class.

1807

1355

attr[attrname] = (

1808

1356

dbus_interface_annotations(alt_interface)

1809

(copy_function(attribute)))

1357

(types.FunctionType(attribute.func_code,

1358

attribute.func_globals,

1359

attribute.func_name,

1360

attribute.func_defaults,

1361

attribute.func_closure)))

1810

1362

if deprecate:

1811

1363

# Deprecate all alternate interfaces

1812

iname = "_AlternateDBusNames_interface_annotation{}"

1364

iname="_AlternateDBusNames_interface_annotation{}"

1813

1365

for interface_name in interface_names:

1814

1366

1815

1367

@dbus_interface_annotations(interface_name)

1816

1368

def func(self):

1817

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

1818

"true"}

1369

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

1370

"true" }

1819

1371

# Find an unused name

1820

1372

for aname in (iname.format(i)

1821

1373

for i in itertools.count()):

1825

1377

if interface_names:

1826

1378

# Replace the class with a new subclass of it with

1827

1379

# methods, signals, etc. as created above.

1828

if sys.version_info.major == 2:

1829

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

1830

(cls, ), attr)

1831

else:

1832

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

1833

(cls, ), attr)

1380

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

1381

(cls, ), attr)

1834

1382

return cls

1835

1383

1836

1384

return wrapper

1837

1385

1838

1386

1840

1388

"se.bsnet.fukt.Mandos"})

1841

1389

class ClientDBus(Client, DBusObjectWithProperties):

1842

1390

"""A Client class using D-Bus

1843

1391

1844

1392

Attributes:

1845

1393

dbus_object_path: dbus.ObjectPath

1846

1394

bus: dbus.SystemBus()

1847

1395

"""

1848

1396

1849

1397

runtime_expansions = (Client.runtime_expansions

1850

1398

+ ("dbus_object_path", ))

1851

1399

1852

1400

_interface = "se.recompile.Mandos.Client"

1853

1401

1854

1402

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

1855

1856

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

1403

1404

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

1857

1405

self.bus = bus

1858

1406

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

1859

1407

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

1865

1413

"/clients/" + client_object_name)

1866

1414

DBusObjectWithProperties.__init__(self, self.bus,

1867

1415

self.dbus_object_path)

1868

1416

1869

1417

def notifychangeproperty(transform_func, dbus_name,

1870

1418

type_func=lambda x: x,

1871

1419

variant_level=1,

1873

1421

_interface=_interface):

1874

1422

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

1875

1423

its changes to DBus.

1876

1424

1877

1425

transform_fun: Function that takes a value and a variant_level

1878

1426

and transforms it to a D-Bus type.

1879

1427

dbus_name: D-Bus name of the variable

1882

1430

variant_level: D-Bus variant level. Default: 1

1883

1431

"""

1884

1432

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

1885

1433

1886

1434

def setter(self, value):

1887

1435

if hasattr(self, "dbus_object_path"):

1888

1436

if (not hasattr(self, attrname) or

1895

1443

else:

1896

1444

dbus_value = transform_func(

1897

1445

type_func(value),

1898

variant_level=variant_level)

1446

variant_level = variant_level)

1899

1447

self.PropertyChanged(dbus.String(dbus_name),

1900

1448

dbus_value)

1901

1449

self.PropertiesChanged(

1902

1450

_interface,

1903

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

1904

dbus_value}),

1451

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

1452

dbus_value }),

1905

1453

dbus.Array())

1906

1454

setattr(self, attrname, value)

1907

1455

1908

1456

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

1909

1457

1910

1458

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1911

1459

approvals_pending = notifychangeproperty(dbus.Boolean,

1912

1460

"ApprovalPending",

1913

type_func=bool)

1461

type_func = bool)

1914

1462

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

1915

1463

last_enabled = notifychangeproperty(datetime_to_dbus,

1916

1464

"LastEnabled")

1917

1465

checker = notifychangeproperty(

1918

1466

dbus.Boolean, "CheckerRunning",

1919

type_func=lambda checker: checker is not None)

1467

type_func = lambda checker: checker is not None)

1920

1468

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1921

1469

"LastCheckedOK")

1922

1470

last_checker_status = notifychangeproperty(dbus.Int16,

1927

1475

"ApprovedByDefault")

1928

1476

approval_delay = notifychangeproperty(

1929

1477

dbus.UInt64, "ApprovalDelay",

1930

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

1478

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

1931

1479

approval_duration = notifychangeproperty(

1932

1480

dbus.UInt64, "ApprovalDuration",

1933

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

1481

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

1934

1482

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

1935

1483

timeout = notifychangeproperty(

1936

1484

dbus.UInt64, "Timeout",

1937

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

1485

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

1938

1486

extended_timeout = notifychangeproperty(

1939

1487

dbus.UInt64, "ExtendedTimeout",

1940

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

1488

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

1941

1489

interval = notifychangeproperty(

1942

1490

dbus.UInt64, "Interval",

1943

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

1491

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

1944

1492

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

1945

1493

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

1946

1494

invalidate_only=True)

1947

1495

1948

1496

del notifychangeproperty

1949

1497

1950

1498

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

1951

1499

try:

1952

1500

self.remove_from_connection()

1955

1503

if hasattr(DBusObjectWithProperties, "__del__"):

1956

1504

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

1957

1505

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

1958

1506

1959

1507

def checker_callback(self, source, condition,

1960

1508

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

1961

1509

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

1977

1525

| self.last_checker_signal),

1978

1526

dbus.String(command))

1979

1527

return ret

1980

1528

1981

1529

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

1982

1530

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

1983

1531

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

1987

1535

# Emit D-Bus signal

1988

1536

self.CheckerStarted(self.current_checker_command)

1989

1537

return r

1990

1538

1991

1539

def _reset_approved(self):

1992

1540

self.approved = None

1993

1541

return False

1994

1542

1995

1543

def approve(self, value=True):

1996

1544

self.approved = value

1997

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

1998

* 1000), self._reset_approved)

1545

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

1546

* 1000), self._reset_approved)

1999

1547

self.send_changedstate()

2000

2001

# D-Bus methods, signals & properties

2002

2003

# Interfaces

2004

2005

# Signals

2006

1548

1549

## D-Bus methods, signals & properties

1550

1551

## Interfaces

1552

1553

## Signals

1554

2007

1555

# CheckerCompleted - signal

2008

1556

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

2009

1557

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

2010

1558

"D-Bus signal"

2011

1559

pass

2012

1560

2013

1561

# CheckerStarted - signal

2014

1562

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

2015

1563

def CheckerStarted(self, command):

2016

1564

"D-Bus signal"

2017

1565

pass

2018

1566

2019

1567

# PropertyChanged - signal

2020

1568

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

2021

1569

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

2022

1570

def PropertyChanged(self, property, value):

2023

1571

"D-Bus signal"

2024

1572

pass

2025

1573

2026

1574

# GotSecret - signal

2027

1575

@dbus.service.signal(_interface)

2028

1576

def GotSecret(self):

2031

1579

server to mandos-client

2032

1580

"""

2033

1581

pass

2034

1582

2035

1583

# Rejected - signal

2036

1584

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

2037

1585

def Rejected(self, reason):

2038

1586

"D-Bus signal"

2039

1587

pass

2040

1588

2041

1589

# NeedApproval - signal

2042

1590

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

2043

1591

def NeedApproval(self, timeout, default):

2044

1592

"D-Bus signal"

2045

1593

return self.need_approval()

2046

2047

# Methods

2048

1594

1595

## Methods

1596

2049

1597

# Approve - method

2050

1598

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

2051

1599

def Approve(self, value):

2052

1600

self.approve(value)

2053

1601

2054

1602

# CheckedOK - method

2055

1603

@dbus.service.method(_interface)

2056

1604

def CheckedOK(self):

2057

1605

self.checked_ok()

2058

1606

2059

1607

# Enable - method

2060

1608

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

2061

1609

@dbus.service.method(_interface)

2062

1610

def Enable(self):

2063

1611

"D-Bus method"

2064

1612

self.enable()

2065

1613

2066

1614

# StartChecker - method

2067

1615

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

2068

1616

@dbus.service.method(_interface)

2069

1617

def StartChecker(self):

2070

1618

"D-Bus method"

2071

1619

self.start_checker()

2072

1620

2073

1621

# Disable - method

2074

1622

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

2075

1623

@dbus.service.method(_interface)

2076

1624

def Disable(self):

2077

1625

"D-Bus method"

2078

1626

self.disable()

2079

1627

2080

1628

# StopChecker - method

2081

1629

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

2082

1630

@dbus.service.method(_interface)

2083

1631

def StopChecker(self):

2084

1632

self.stop_checker()

2085

2086

# Properties

2087

1633

1634

## Properties

1635

2088

1636

# ApprovalPending - property

2089

1637

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

2090

1638

def ApprovalPending_dbus_property(self):

2091

1639

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

2092

1640

2093

1641

# ApprovedByDefault - property

2094

1642

@dbus_service_property(_interface,

2095

1643

signature="b",

2098

1646

if value is None: # get

2099

1647

return dbus.Boolean(self.approved_by_default)

2100

1648

self.approved_by_default = bool(value)

2101

1649

2102

1650

# ApprovalDelay - property

2103

1651

@dbus_service_property(_interface,

2104

1652

signature="t",

2108

1656

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

2109

1657

* 1000)

2110

1658

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

2111

1659

2112

1660

# ApprovalDuration - property

2113

1661

@dbus_service_property(_interface,

2114

1662

signature="t",

2118

1666

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

2119

1667

* 1000)

2120

1668

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

2121

1669

2122

1670

# Name - property

2123

1671

@dbus_annotations(

2124

1672

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

2125

1673

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

2126

1674

def Name_dbus_property(self):

2127

1675

return dbus.String(self.name)

2128

2129

# KeyID - property

2130

@dbus_annotations(

2131

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

2132

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

2133

def KeyID_dbus_property(self):

2134

return dbus.String(self.key_id)

2135

1676

2136

1677

# Fingerprint - property

2137

1678

@dbus_annotations(

2138

1679

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

2139

1680

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

2140

1681

def Fingerprint_dbus_property(self):

2141

1682

return dbus.String(self.fingerprint)

2142

1683

2143

1684

# Host - property

2144

1685

@dbus_service_property(_interface,

2145

1686

signature="s",

2148

1689

if value is None: # get

2149

1690

return dbus.String(self.host)

2150

1691

self.host = str(value)

2151

1692

2152

1693

# Created - property

2153

1694

@dbus_annotations(

2154

1695

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

2155

1696

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

2156

1697

def Created_dbus_property(self):

2157

1698

return datetime_to_dbus(self.created)

2158

1699

2159

1700

# LastEnabled - property

2160

1701

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

2161

1702

def LastEnabled_dbus_property(self):

2162

1703

return datetime_to_dbus(self.last_enabled)

2163

1704

2164

1705

# Enabled - property

2165

1706

@dbus_service_property(_interface,

2166

1707

signature="b",

2172

1713

self.enable()

2173

1714

else:

2174

1715

self.disable()

2175

1716

2176

1717

# LastCheckedOK - property

2177

1718

@dbus_service_property(_interface,

2178

1719

signature="s",

2182

1723

self.checked_ok()

2183

1724

return

2184

1725

return datetime_to_dbus(self.last_checked_ok)

2185

1726

2186

1727

# LastCheckerStatus - property

2187

1728

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

2188

1729

def LastCheckerStatus_dbus_property(self):

2189

1730

return dbus.Int16(self.last_checker_status)

2190

1731

2191

1732

# Expires - property

2192

1733

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

2193

1734

def Expires_dbus_property(self):

2194

1735

return datetime_to_dbus(self.expires)

2195

1736

2196

1737

# LastApprovalRequest - property

2197

1738

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

2198

1739

def LastApprovalRequest_dbus_property(self):

2199

1740

return datetime_to_dbus(self.last_approval_request)

2200

1741

2201

1742

# Timeout - property

2202

1743

@dbus_service_property(_interface,

2203

1744

signature="t",

2218

1759

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

2219

1760

is None):

2220

1761

return

2221

GLib.source_remove(self.disable_initiator_tag)

2222

self.disable_initiator_tag = GLib.timeout_add(

1762

gobject.source_remove(self.disable_initiator_tag)

1763

self.disable_initiator_tag = gobject.timeout_add(

2223

1764

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

2224

1765

self.disable)

2225

1766

2226

1767

# ExtendedTimeout - property

2227

1768

@dbus_service_property(_interface,

2228

1769

signature="t",

2232

1773

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

2233

1774

* 1000)

2234

1775

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

2235

1776

2236

1777

# Interval - property

2237

1778

@dbus_service_property(_interface,

2238

1779

signature="t",

2245

1786

return

2246

1787

if self.enabled:

2247

1788

# Reschedule checker run

2248

GLib.source_remove(self.checker_initiator_tag)

2249

self.checker_initiator_tag = GLib.timeout_add(

1789

gobject.source_remove(self.checker_initiator_tag)

1790

self.checker_initiator_tag = gobject.timeout_add(

2250

1791

value, self.start_checker)

2251

self.start_checker() # Start one now, too

2252

1792

self.start_checker() # Start one now, too

1793

2253

1794

# Checker - property

2254

1795

@dbus_service_property(_interface,

2255

1796

signature="s",

2258

1799

if value is None: # get

2259

1800

return dbus.String(self.checker_command)

2260

1801

self.checker_command = str(value)

2261

1802

2262

1803

# CheckerRunning - property

2263

1804

@dbus_service_property(_interface,

2264

1805

signature="b",

2270

1811

self.start_checker()

2271

1812

else:

2272

1813

self.stop_checker()

2273

1814

2274

1815

# ObjectPath - property

2275

1816

@dbus_annotations(

2276

1817

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

2277

1818

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

2278

1819

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

2279

1820

def ObjectPath_dbus_property(self):

2280

return self.dbus_object_path # is already a dbus.ObjectPath

2281

1821

return self.dbus_object_path # is already a dbus.ObjectPath

1822

2282

1823

# Secret = property

2283

1824

@dbus_annotations(

2284

1825

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

2289

1830

byte_arrays=True)

2290

1831

def Secret_dbus_property(self, value):

2291

1832

self.secret = bytes(value)

2292

1833

2293

1834

del _interface

2294

1835

2295

1836

2296

class ProxyClient:

2297

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

1837

class ProxyClient(object):

1838

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

2298

1839

self._pipe = child_pipe

2299

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

1840

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

2300

1841

if not self._pipe.recv():

2301

raise KeyError(key_id or fpr)

2302

1842

raise KeyError(fpr)

1843

2303

1844

def __getattribute__(self, name):

2304

if name == "_pipe":

1845

if name == '_pipe':

2305

1846

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

2306

self._pipe.send(("getattr", name))

1847

self._pipe.send(('getattr', name))

2307

1848

data = self._pipe.recv()

2308

if data[0] == "data":

1849

if data[0] == 'data':

2309

1850

return data[1]

2310

if data[0] == "function":

2311

1851

if data[0] == 'function':

1852

2312

1853

def func(*args, **kwargs):

2313

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

1854

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

2314

1855

return self._pipe.recv()[1]

2315

1856

2316

1857

return func

2317

1858

2318

1859

def __setattr__(self, name, value):

2319

if name == "_pipe":

1860

if name == '_pipe':

2320

1861

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

2321

self._pipe.send(("setattr", name, value))

1862

self._pipe.send(('setattr', name, value))

2322

1863

2323

1864

2324

1865

class ClientHandler(socketserver.BaseRequestHandler, object):

2325

1866

"""A class to handle client connections.

2326

1867

2327

1868

Instantiated once for each connection to handle it.

2328

1869

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

2329

1870

2330

1871

def handle(self):

2331

1872

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

2332

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

2333

str(self.client_address))

2334

log.debug("Pipe FD: %d", self.server.child_pipe.fileno())

2335

2336

session = gnutls.ClientSession(self.request)

2337

2338

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

2339

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

2340

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

2341

# "+DHE-DSS"))

1873

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

1874

str(self.client_address))

1875

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

1876

self.server.child_pipe.fileno())

1877

1878

session = gnutls.connection.ClientSession(

1879

self.request, gnutls.connection .X509Credentials())

1880

1881

# Note: gnutls.connection.X509Credentials is really a

1882

# generic GnuTLS certificate credentials object so long as

1883

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

1884

# here despite using OpenPGP certificates.

1885

1886

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

1887

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

1888

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

1889

# "+DHE-DSS"))

2342

1890

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

2343

1891

priority = self.server.gnutls_priority

2344

1892

if priority is None:

2345

1893

priority = "NORMAL"

2346

gnutls.priority_set_direct(session,

2347

priority.encode("utf-8"), None)

2348

1894

gnutls.library.functions.gnutls_priority_set_direct(

1895

session._c_object, priority, None)

1896

2349

1897

# Start communication using the Mandos protocol

2350

1898

# Get protocol number

2351

1899

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

2352

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

1900

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

2353

1901

try:

2354

1902

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

2355

1903

raise RuntimeError(line)

2356

1904

except (ValueError, IndexError, RuntimeError) as error:

2357

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

1905

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

2358

1906

return

2359

1907

2360

1908

# Start GnuTLS connection

2361

1909

try:

2362

1910

session.handshake()

2363

except gnutls.Error as error:

2364

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

1911

except gnutls.errors.GNUTLSError as error:

1912

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

2365

1913

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

2366

1914

# established. Just abandon the request.

2367

1915

return

2368

log.debug("Handshake succeeded")

2369

1916

logger.debug("Handshake succeeded")

1917

2370

1918

approval_required = False

2371

1919

try:

2372

if gnutls.has_rawpk:

2373

fpr = b""

2374

try:

2375

key_id = self.key_id(

2376

self.peer_certificate(session))

2377

except (TypeError, gnutls.Error) as error:

2378

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

2379

return

2380

log.debug("Key ID: %s",

2381

key_id.decode("utf-8",

2382

errors="replace"))

2383

2384

else:

2385

key_id = b""

2386

try:

2387

fpr = self.fingerprint(

2388

self.peer_certificate(session))

2389

except (TypeError, gnutls.Error) as error:

2390

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

2391

return

2392

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

2393

2394

try:

2395

client = ProxyClient(child_pipe, key_id, fpr,

1920

try:

1921

fpr = self.fingerprint(

1922

self.peer_certificate(session))

1923

except (TypeError,

1924

gnutls.errors.GNUTLSError) as error:

1925

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

1926

return

1927

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

1928

1929

try:

1930

client = ProxyClient(child_pipe, fpr,

2396

1931

self.client_address)

2397

1932

except KeyError:

2398

1933

return

2399

1934

2400

1935

if client.approval_delay:

2401

1936

delay = client.approval_delay

2402

1937

client.approvals_pending += 1

2403

1938

approval_required = True

2404

1939

2405

1940

while True:

2406

1941

if not client.enabled:

2407

log.info("Client %s is disabled", client.name)

1942

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

1943

client.name)

2408

1944

if self.server.use_dbus:

2409

1945

# Emit D-Bus signal

2410

1946

client.Rejected("Disabled")

2411

1947

return

2412

1948

2413

1949

if client.approved or not client.approval_delay:

2414

# We are approved or approval is disabled

1950

#We are approved or approval is disabled

2415

1951

break

2416

1952

elif client.approved is None:

2417

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

2418

client.name)

1953

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

1954

client.name)

2419

1955

if self.server.use_dbus:

2420

1956

# Emit D-Bus signal

2421

1957

client.NeedApproval(

2422

1958

client.approval_delay.total_seconds()

2423

1959

* 1000, client.approved_by_default)

2424

1960

else:

2425

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

2426

client.name)

1961

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

1962

client.name)

2427

1963

if self.server.use_dbus:

2428

1964

# Emit D-Bus signal

2429

1965

client.Rejected("Denied")

2430

1966

return

2431

2432

# wait until timeout or approved

1967

1968

#wait until timeout or approved

2433

1969

time = datetime.datetime.now()

2434

1970

client.changedstate.acquire()

2435

1971

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

2437

1973

time2 = datetime.datetime.now()

2438

1974

if (time2 - time) >= delay:

2439

1975

if not client.approved_by_default:

2440

log.warning("Client %s timed out while"

2441

" waiting for approval",

2442

client.name)

1976

logger.warning("Client %s timed out while"

1977

" waiting for approval",

1978

client.name)

2443

1979

if self.server.use_dbus:

2444

1980

# Emit D-Bus signal

2445

1981

client.Rejected("Approval timed out")

2448

1984

break

2449

1985

else:

2450

1986

delay -= time2 - time

2451

2452

try:

2453

session.send(client.secret)

2454

except gnutls.Error as error:

2455

log.warning("gnutls send failed", exc_info=error)

2456

return

2457

2458

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

1987

1988

sent_size = 0

1989

while sent_size < len(client.secret):

1990

try:

1991

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

1992

except gnutls.errors.GNUTLSError as error:

1993

logger.warning("gnutls send failed",

1994

exc_info=error)

1995

return

1996

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

1997

len(client.secret) - (sent_size

1998

+ sent))

1999

sent_size += sent

2000

2001

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

2459

2002

# bump the timeout using extended_timeout

2460

2003

client.bump_timeout(client.extended_timeout)

2461

2004

if self.server.use_dbus:

2462

2005

# Emit D-Bus signal

2463

2006

client.GotSecret()

2464

2007

2465

2008

finally:

2466

2009

if approval_required:

2467

2010

client.approvals_pending -= 1

2468

2011

try:

2469

2012

session.bye()

2470

except gnutls.Error as error:

2471

log.warning("GnuTLS bye failed", exc_info=error)

2472

2013

except gnutls.errors.GNUTLSError as error:

2014

logger.warning("GnuTLS bye failed",

2015

exc_info=error)

2016

2473

2017

@staticmethod

2474

2018

def peer_certificate(session):

2475

"Return the peer's certificate as a bytestring"

2476

try:

2477

cert_type = gnutls.certificate_type_get2(

2478

session, gnutls.CTYPE_PEERS)

2479

except AttributeError:

2480

cert_type = gnutls.certificate_type_get(session)

2481

if gnutls.has_rawpk:

2482

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2483

else:

2484

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2485

# If not a valid certificate type...

2486

if cert_type not in valid_cert_types:

2487

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

2488

valid_cert_types)

2489

# ...return invalid data

2490

return b""

2019

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

2020

# If not an OpenPGP certificate...

2021

if (gnutls.library.functions.gnutls_certificate_type_get(

2022

session._c_object)

2023

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

2024

# ...do the normal thing

2025

return session.peer_certificate

2491

2026

list_size = ctypes.c_uint(1)

2492

cert_list = (gnutls.certificate_get_peers

2493

(session, ctypes.byref(list_size)))

2027

cert_list = (gnutls.library.functions

2028

.gnutls_certificate_get_peers

2029

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

2494

2030

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

2495

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

2031

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

2032

" certificate")

2496

2033

if list_size.value == 0:

2497

2034

return None

2498

2035

cert = cert_list[0]

2499

2036

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

2500

2501

@staticmethod

2502

def key_id(certificate):

2503

"Convert a certificate bytestring to a hexdigit key ID"

2504

# New GnuTLS "datum" with the public key

2505

datum = gnutls.datum_t(

2506

ctypes.cast(ctypes.c_char_p(certificate),

2507

ctypes.POINTER(ctypes.c_ubyte)),

2508

ctypes.c_uint(len(certificate)))

2509

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

2510

# New empty GnuTLS certificate

2511

pubkey = gnutls.pubkey_t()

2512

gnutls.pubkey_init(ctypes.byref(pubkey))

2513

# Import the raw public key into the certificate

2514

gnutls.pubkey_import(pubkey,

2515

ctypes.byref(datum),

2516

gnutls.X509_FMT_DER)

2517

# New buffer for the key ID

2518

buf = ctypes.create_string_buffer(32)

2519

buf_len = ctypes.c_size_t(len(buf))

2520

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

2521

gnutls.pubkey_get_key_id(

2522

pubkey,

2523

gnutls.KEYID_USE_SHA256,

2524

ctypes.cast(ctypes.byref(buf),

2525

ctypes.POINTER(ctypes.c_ubyte)),

2526

ctypes.byref(buf_len))

2527

# Deinit the certificate

2528

gnutls.pubkey_deinit(pubkey)

2529

2530

# Convert the buffer to a Python bytestring

2531

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

2532

# Convert the bytestring to hexadecimal notation

2533

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

2534

return hex_key_id

2535

2037

2536

2038

@staticmethod

2537

2039

def fingerprint(openpgp):

2538

2040

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2539

2041

# New GnuTLS "datum" with the OpenPGP public key

2540

datum = gnutls.datum_t(

2042

datum = gnutls.library.types.gnutls_datum_t(

2541

2043

ctypes.cast(ctypes.c_char_p(openpgp),

2542

2044

ctypes.POINTER(ctypes.c_ubyte)),

2543

2045

ctypes.c_uint(len(openpgp)))

2544

2046

# New empty GnuTLS certificate

2545

crt = gnutls.openpgp_crt_t()

2546

gnutls.openpgp_crt_init(ctypes.byref(crt))

2047

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2048

gnutls.library.functions.gnutls_openpgp_crt_init(

2049

ctypes.byref(crt))

2547

2050

# Import the OpenPGP public key into the certificate

2548

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

2549

gnutls.OPENPGP_FMT_RAW)

2051

gnutls.library.functions.gnutls_openpgp_crt_import(

2052

crt, ctypes.byref(datum),

2053

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2550

2054

# Verify the self signature in the key

2551

2055

crtverify = ctypes.c_uint()

2552

gnutls.openpgp_crt_verify_self(crt, 0,

2553

ctypes.byref(crtverify))

2056

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2057

crt, 0, ctypes.byref(crtverify))

2554

2058

if crtverify.value != 0:

2555

gnutls.openpgp_crt_deinit(crt)

2556

raise gnutls.CertificateSecurityError(code

2557

=crtverify.value)

2059

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2060

raise gnutls.errors.CertificateSecurityError(

2061

"Verify failed")

2558

2062

# New buffer for the fingerprint

2559

2063

buf = ctypes.create_string_buffer(20)

2560

2064

buf_len = ctypes.c_size_t()

2561

2065

# Get the fingerprint from the certificate into the buffer

2562

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

2563

ctypes.byref(buf_len))

2066

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2067

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

2564

2068

# Deinit the certificate

2565

gnutls.openpgp_crt_deinit(crt)

2069

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2566

2070

# Convert the buffer to a Python bytestring

2567

2071

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

2568

2072

# Convert the bytestring to hexadecimal notation

2570

2074

return hex_fpr

2571

2075

2572

2076

2573

class MultiprocessingMixIn:

2077

class MultiprocessingMixIn(object):

2574

2078

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

2575

2079

2576

2080

def sub_process_main(self, request, address):

2577

2081

try:

2578

2082

self.finish_request(request, address)

2579

2083

except Exception:

2580

2084

self.handle_error(request, address)

2581

2085

self.close_request(request)

2582

2086

2583

2087

def process_request(self, request, address):

2584

2088

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

2585

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

2586

args=(request, address))

2089

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

2090

args = (request, address))

2587

2091

proc.start()

2588

2092

return proc

2589

2093

2590

2094

2591

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2095

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2592

2096

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

2593

2097

2594

2098

def process_request(self, request, client_address):

2595

2099

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

2596

2100

2597

2101

This function creates a new pipe in self.pipe

2598

2102

"""

2599

2103

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2600

2104

2601

2105

proc = MultiprocessingMixIn.process_request(self, request,

2602

2106

client_address)

2603

2107

self.child_pipe.close()

2604

2108

self.add_pipe(parent_pipe, proc)

2605

2109

2606

2110

def add_pipe(self, parent_pipe, proc):

2607

2111

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

2608

2112

raise NotImplementedError()

2609

2113

2610

2114

2611

2115

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2612

socketserver.TCPServer):

2613

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

2614

2116

socketserver.TCPServer, object):

2117

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

2118

2615

2119

Attributes:

2616

2120

enabled: Boolean; whether this server is activated yet

2617

2121

interface: None or a network interface name (string)

2618

2122

use_ipv6: Boolean; to use IPv6 or not

2619

2123

"""

2620

2124

2621

2125

def __init__(self, server_address, RequestHandlerClass,

2622

2126

interface=None,

2623

2127

use_ipv6=True,

2633

2137

self.socketfd = socketfd

2634

2138

# Save the original socket.socket() function

2635

2139

self.socket_socket = socket.socket

2636

2637

2140

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

2638

#

2141

#

2639

2142

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

2640

2143

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

2641

2144

# patching socket.socket.)

2642

#

2145

#

2643

2146

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

2644

2147

@functools.wraps(socket.socket)

2645

2148

def socket_wrapper(*args, **kwargs):

2657

2160

# socket_wrapper(), if socketfd was set.

2658

2161

socketserver.TCPServer.__init__(self, server_address,

2659

2162

RequestHandlerClass)

2660

2163

2661

2164

def server_bind(self):

2662

2165

"""This overrides the normal server_bind() function

2663

2166

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

2664

2167

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

2665

global SO_BINDTODEVICE

2666

2168

if self.interface is not None:

2667

2169

if SO_BINDTODEVICE is None:

2668

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

2669

# common enough.

2670

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

2671

SO_BINDTODEVICE = 25

2672

try:

2673

self.socket.setsockopt(

2674

socket.SOL_SOCKET, SO_BINDTODEVICE,

2675

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

2676

except socket.error as error:

2677

if error.errno == errno.EPERM:

2678

log.error("No permission to bind to interface %s",

2679

self.interface)

2680

elif error.errno == errno.ENOPROTOOPT:

2681

log.error("SO_BINDTODEVICE not available; cannot"

2682

" bind to interface %s", self.interface)

2683

elif error.errno == errno.ENODEV:

2684

log.error("Interface %s does not exist, cannot"

2685

" bind", self.interface)

2686

else:

2687

raise

2170

logger.error("SO_BINDTODEVICE does not exist;"

2171

" cannot bind to interface %s",

2172

self.interface)

2173

else:

2174

try:

2175

self.socket.setsockopt(

2176

socket.SOL_SOCKET, SO_BINDTODEVICE,

2177

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

2178

except socket.error as error:

2179

if error.errno == errno.EPERM:

2180

logger.error("No permission to bind to"

2181

" interface %s", self.interface)

2182

elif error.errno == errno.ENOPROTOOPT:

2183

logger.error("SO_BINDTODEVICE not available;"

2184

" cannot bind to interface %s",

2185

self.interface)

2186

elif error.errno == errno.ENODEV:

2187

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

2188

" cannot bind", self.interface)

2189

else:

2190

raise

2688

2191

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

2689

2192

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

2690

if self.server_address[1]:

2691

self.allow_reuse_address = True

2692

2193

if not self.server_address[0]:

2693

2194

if self.address_family == socket.AF_INET6:

2694

any_address = "::" # in6addr_any

2195

any_address = "::" # in6addr_any

2695

2196

else:

2696

any_address = "0.0.0.0" # INADDR_ANY

2197

any_address = "0.0.0.0" # INADDR_ANY

2697

2198

self.server_address = (any_address,

2698

2199

self.server_address[1])

2699

2200

elif not self.server_address[1]:

2709

2210

2710

2211

class MandosServer(IPv6_TCPServer):

2711

2212

"""Mandos server.

2712

2213

2713

2214

Attributes:

2714

2215

clients: set of Client objects

2715

2216

gnutls_priority GnuTLS priority string

2716

2217

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

2717

2718

Assumes a GLib.MainLoop event loop.

2218

2219

Assumes a gobject.MainLoop event loop.

2719

2220

"""

2720

2221

2721

2222

def __init__(self, server_address, RequestHandlerClass,

2722

2223

interface=None,

2723

2224

use_ipv6=True,

2733

2234

self.gnutls_priority = gnutls_priority

2734

2235

IPv6_TCPServer.__init__(self, server_address,

2735

2236

RequestHandlerClass,

2736

interface=interface,

2737

use_ipv6=use_ipv6,

2738

socketfd=socketfd)

2739

2237

interface = interface,

2238

use_ipv6 = use_ipv6,

2239

socketfd = socketfd)

2240

2740

2241

def server_activate(self):

2741

2242

if self.enabled:

2742

2243

return socketserver.TCPServer.server_activate(self)

2743

2244

2744

2245

def enable(self):

2745

2246

self.enabled = True

2746

2247

2747

2248

def add_pipe(self, parent_pipe, proc):

2748

2249

# Call "handle_ipc" for both data and EOF events

2749

GLib.io_add_watch(

2750

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2751

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2250

gobject.io_add_watch(

2251

parent_pipe.fileno(),

2252

gobject.IO_IN | gobject.IO_HUP,

2752

2253

functools.partial(self.handle_ipc,

2753

parent_pipe=parent_pipe,

2754

proc=proc))

2755

2254

parent_pipe = parent_pipe,

2255

proc = proc))

2256

2756

2257

def handle_ipc(self, source, condition,

2757

2258

parent_pipe=None,

2758

proc=None,

2259

proc = None,

2759

2260

client_object=None):

2760

2261

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

2761

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

2262

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

2762

2263

# Wait for other process to exit

2763

2264

proc.join()

2764

2265

return False

2765

2266

2766

2267

# Read a request from the child

2767

2268

request = parent_pipe.recv()

2768

2269

command = request[0]

2769

2770

if command == "init":

2771

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

2772

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

2773

address = request[3]

2774

2775

for c in self.clients.values():

2776

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2777

"27AE41E4649B934CA495991B7852B855"):

2778

continue

2779

if key_id and c.key_id == key_id:

2780

client = c

2781

break

2782

if fpr and c.fingerprint == fpr:

2270

2271

if command == 'init':

2272

fpr = request[1]

2273

address = request[2]

2274

2275

for c in self.clients.itervalues():

2276

if c.fingerprint == fpr:

2783

2277

client = c

2784

2278

break

2785

2279

else:

2786

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

2787

" %s", key_id or fpr, address)

2280

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

2281

"dress: %s", fpr, address)

2788

2282

if self.use_dbus:

2789

2283

# Emit D-Bus signal

2790

mandos_dbus_service.ClientNotFound(key_id or fpr,

2284

mandos_dbus_service.ClientNotFound(fpr,

2791

2285

address[0])

2792

2286

parent_pipe.send(False)

2793

2287

return False

2794

2795

GLib.io_add_watch(

2796

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2797

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2288

2289

gobject.io_add_watch(

2290

parent_pipe.fileno(),

2291

gobject.IO_IN | gobject.IO_HUP,

2798

2292

functools.partial(self.handle_ipc,

2799

parent_pipe=parent_pipe,

2800

proc=proc,

2801

client_object=client))

2293

parent_pipe = parent_pipe,

2294

proc = proc,

2295

client_object = client))

2802

2296

parent_pipe.send(True)

2803

2297

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

2804

2298

# same fileno

2805

2299

return False

2806

if command == "funcall":

2300

if command == 'funcall':

2807

2301

funcname = request[1]

2808

2302

args = request[2]

2809

2303

kwargs = request[3]

2810

2811

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

2304

2305

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

2812

2306

funcname)(*args,

2813

2307

**kwargs)))

2814

2815

if command == "getattr":

2308

2309

if command == 'getattr':

2816

2310

attrname = request[1]

2817

2311

if isinstance(client_object.__getattribute__(attrname),

2818

collections.abc.Callable):

2819

parent_pipe.send(("function", ))

2312

collections.Callable):

2313

parent_pipe.send(('function', ))

2820

2314

else:

2821

2315

parent_pipe.send((

2822

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

2823

2824

if command == "setattr":

2316

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

2317

2318

if command == 'setattr':

2825

2319

attrname = request[1]

2826

2320

value = request[2]

2827

2321

setattr(client_object, attrname, value)

2828

2322

2829

2323

return True

2830

2324

2831

2325

2832

2326

def rfc3339_duration_to_delta(duration):

2833

2327

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

2834

2835

>>> timedelta = datetime.timedelta

2836

>>> rfc3339_duration_to_delta("P7D") == timedelta(7)

2837

True

2838

>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)

2839

True

2840

>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)

2841

True

2842

>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)

2843

True

2844

>>> rfc3339_duration_to_delta("P1W") == timedelta(7)

2845

True

2846

>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)

2847

True

2848

>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)

2849

True

2850

>>> del timedelta

2328

2329

>>> rfc3339_duration_to_delta("P7D")

2330

datetime.timedelta(7)

2331

>>> rfc3339_duration_to_delta("PT60S")

2332

datetime.timedelta(0, 60)

2333

>>> rfc3339_duration_to_delta("PT60M")

2334

datetime.timedelta(0, 3600)

2335

>>> rfc3339_duration_to_delta("PT24H")

2336

datetime.timedelta(1)

2337

>>> rfc3339_duration_to_delta("P1W")

2338

datetime.timedelta(7)

2339

>>> rfc3339_duration_to_delta("PT5M30S")

2340

datetime.timedelta(0, 330)

2341

>>> rfc3339_duration_to_delta("P1DT3M20S")

2342

datetime.timedelta(1, 200)

2851

2343

"""

2852

2344

2853

2345

# Parsing an RFC 3339 duration with regular expressions is not

2854

2346

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

2855

2347

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

2856

2348

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

2857

2349

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

2858

2350

# avoid excessive use of external libraries.

2859

2351

2860

2352

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

2861

2353

Token = collections.namedtuple("Token", (

2862

2354

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

2895

2387

frozenset((token_year, token_month,

2896

2388

token_day, token_time,

2897

2389

token_week)))

2898

# Define starting values:

2899

# Value so far

2900

value = datetime.timedelta()

2390

# Define starting values

2391

value = datetime.timedelta() # Value so far

2901

2392

found_token = None

2902

# Following valid tokens

2903

followers = frozenset((token_duration, ))

2904

# String left to parse

2905

s = duration

2393

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

2394

s = duration # String left to parse

2906

2395

# Loop until end token is found

2907

2396

while found_token is not token_end:

2908

2397

# Search for any currently valid tokens

2932

2421

2933

2422

def string_to_delta(interval):

2934

2423

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

2935

2936

>>> string_to_delta("7d") == datetime.timedelta(7)

2937

True

2938

>>> string_to_delta("60s") == datetime.timedelta(0, 60)

2939

True

2940

>>> string_to_delta("60m") == datetime.timedelta(0, 3600)

2941

True

2942

>>> string_to_delta("24h") == datetime.timedelta(1)

2943

True

2944

>>> string_to_delta("1w") == datetime.timedelta(7)

2945

True

2946

>>> string_to_delta("5m 30s") == datetime.timedelta(0, 330)

2947

True

2424

2425

>>> string_to_delta('7d')

2426

datetime.timedelta(7)

2427

>>> string_to_delta('60s')

2428

datetime.timedelta(0, 60)

2429

>>> string_to_delta('60m')

2430

datetime.timedelta(0, 3600)

2431

>>> string_to_delta('24h')

2432

datetime.timedelta(1)

2433

>>> string_to_delta('1w')

2434

datetime.timedelta(7)

2435

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

2436

datetime.timedelta(0, 330)

2948

2437

"""

2949

2438

2950

2439

try:

2951

2440

return rfc3339_duration_to_delta(interval)

2952

2441

except ValueError:

2953

2442

pass

2954

2443

2955

2444

timevalue = datetime.timedelta(0)

2956

2445

for s in interval.split():

2957

2446

try:

2975

2464

return timevalue

2976

2465

2977

2466

2978

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

2467

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

2979

2468

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

2980

2469

2981

2470

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

2982

2471

if os.fork():

2983

2472

sys.exit()

3001

2490

3002

2491

3003

2492

def main():

3004

2493

3005

2494

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

3006

2495

# Parsing of options, both command line and config file

3007

2496

3008

2497

parser = argparse.ArgumentParser()

3009

2498

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

3010

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

2499

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

3011

2500

help="show version number and exit")

3012

2501

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

3013

2502

help="Bind to interface IF")

3049

2538

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

3050

2539

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

3051

2540

default=None)

3052

2541

3053

2542

options = parser.parse_args()

3054

2543

2544

if options.check:

2545

import doctest

2546

fail_count, test_count = doctest.testmod()

2547

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

2548

3055

2549

# Default values for config file for server-global settings

3056

if gnutls.has_rawpk:

3057

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

3058

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

3059

else:

3060

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

3061

":+SIGN-DSA-SHA256")

3062

server_defaults = {"interface": "",

3063

"address": "",

3064

"port": "",

3065

"debug": "False",

3066

"priority": priority,

3067

"servicename": "Mandos",

3068

"use_dbus": "True",

3069

"use_ipv6": "True",

3070

"debuglevel": "",

3071

"restore": "True",

3072

"socket": "",

3073

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

3074

"foreground": "False",

3075

"zeroconf": "True",

3076

}

3077

del priority

3078

2550

server_defaults = { "interface": "",

2551

"address": "",

2552

"port": "",

2553

"debug": "False",

2554

"priority":

2555

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

2556

":+SIGN-DSA-SHA256",

2557

"servicename": "Mandos",

2558

"use_dbus": "True",

2559

"use_ipv6": "True",

2560

"debuglevel": "",

2561

"restore": "True",

2562

"socket": "",

2563

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

2564

"foreground": "False",

2565

"zeroconf": "True",

2566

}

2567

3079

2568

# Parse config file for server-global settings

3080

server_config = configparser.ConfigParser(server_defaults)

2569

server_config = configparser.SafeConfigParser(server_defaults)

3081

2570

del server_defaults

3082

2571

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

3083

# Convert the ConfigParser object to a dict

2572

# Convert the SafeConfigParser object to a dict

3084

2573

server_settings = server_config.defaults()

3085

2574

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

3086

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

3087

"foreground", "zeroconf"):

2575

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

3088

2576

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

3089

2577

option)

3090

2578

if server_settings["port"]:

3100

2588

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

3101

2589

["socket"])

3102

2590

del server_config

3103

2591

3104

2592

# Override the settings from the config file with command line

3105

2593

# options, if set.

3106

2594

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

3124

2612

if server_settings["debug"]:

3125

2613

server_settings["foreground"] = True

3126

2614

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

3127

2615

3128

2616

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

3129

2617

3130

2618

if (not server_settings["zeroconf"]

3131

2619

and not (server_settings["port"]

3132

2620

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

3133

2621

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

3134

2622

3135

2623

# For convenience

3136

2624

debug = server_settings["debug"]

3137

2625

debuglevel = server_settings["debuglevel"]

3141

2629

stored_state_file)

3142

2630

foreground = server_settings["foreground"]

3143

2631

zeroconf = server_settings["zeroconf"]

3144

2632

3145

2633

if debug:

3146

2634

initlogger(debug, logging.DEBUG)

3147

2635

else:

3150

2638

else:

3151

2639

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

3152

2640

initlogger(debug, level)

3153

2641

3154

2642

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

3155

2643

syslogger.setFormatter(

3156

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

3157

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

2644

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

2645

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

3158

2646

server_settings["servicename"])))

3159

2647

3160

2648

# Parse config file with clients

3161

client_config = configparser.ConfigParser(Client.client_defaults)

2649

client_config = configparser.SafeConfigParser(Client

2650

.client_defaults)

3162

2651

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

3163

2652

"clients.conf"))

3164

2653

3165

2654

global mandos_dbus_service

3166

2655

mandos_dbus_service = None

3167

2656

3168

2657

socketfd = None

3169

2658

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

3170

2659

socketfd = server_settings["socket"]

3184

2673

try:

3185

2674

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

3186

2675

except IOError as e:

3187

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

3188

exc_info=e)

3189

3190

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

3191

("mandos", "mandos"),

3192

("nobody", "nogroup")):

2676

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

2677

exc_info=e)

2678

2679

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

3193

2680

try:

3194

2681

uid = pwd.getpwnam(name).pw_uid

3195

gid = pwd.getpwnam(group).pw_gid

2682

gid = pwd.getpwnam(name).pw_gid

3196

2683

break

3197

2684

except KeyError:

3198

2685

continue

3202

2689

try:

3203

2690

os.setgid(gid)

3204

2691

os.setuid(uid)

3205

log.debug("Did setuid/setgid to %s:%s", uid, gid)

3206

2692

except OSError as error:

3207

log.warning("Failed to setuid/setgid to %s:%s: %s", uid, gid,

3208

os.strerror(error.errno))

3209

2693

if error.errno != errno.EPERM:

3210

2694

raise

3211

2695

3212

2696

if debug:

3213

2697

# Enable all possible GnuTLS debugging

3214

2698

3215

2699

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

3216

2700

# - GnuTLS manual

3217

gnutls.global_set_log_level(11)

3218

3219

@gnutls.log_func

2701

gnutls.library.functions.gnutls_global_set_log_level(11)

2702

2703

@gnutls.library.types.gnutls_log_func

3220

2704

def debug_gnutls(level, string):

3221

log.debug("GnuTLS: %s",

3222

string[:-1].decode("utf-8", errors="replace"))

3223

3224

gnutls.global_set_log_function(debug_gnutls)

3225

2705

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

2706

2707

gnutls.library.functions.gnutls_global_set_log_function(

2708

debug_gnutls)

2709

3226

2710

# Redirect stdin so all checkers get /dev/null

3227

2711

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

3228

2712

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

3229

2713

if null > 2:

3230

2714

os.close(null)

3231

2715

3232

2716

# Need to fork before connecting to D-Bus

3233

2717

if not foreground:

3234

2718

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

3235

2719

daemon()

3236

3237

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

3238

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

3239

# need to inform GLib that threads will be used.

3240

GLib.threads_init()

3241

2720

2721

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

2722

# need to inform gobject that threads will be used.

2723

gobject.threads_init()

2724

3242

2725

global main_loop

3243

2726

# From the Avahi example code

3244

2727

DBusGMainLoop(set_as_default=True)

3245

main_loop = GLib.MainLoop()

2728

main_loop = gobject.MainLoop()

3246

2729

bus = dbus.SystemBus()

3247

2730

# End of Avahi example code

3248

2731

if use_dbus:

3254

2737

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

3255

2738

do_not_queue=True)

3256

2739

except dbus.exceptions.DBusException as e:

3257

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

2740

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

3258

2741

use_dbus = False

3259

2742

server_settings["use_dbus"] = False

3260

2743

tcp_server.use_dbus = False

3261

2744

if zeroconf:

3262

2745

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3263

2746

service = AvahiServiceToSyslog(

3264

name=server_settings["servicename"],

3265

servicetype="_mandos._tcp",

3266

protocol=protocol,

3267

bus=bus)

2747

name = server_settings["servicename"],

2748

servicetype = "_mandos._tcp",

2749

protocol = protocol,

2750

bus = bus)

3268

2751

if server_settings["interface"]:

3269

2752

service.interface = if_nametoindex(

3270

2753

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

3271

2754

3272

2755

global multiprocessing_manager

3273

2756

multiprocessing_manager = multiprocessing.Manager()

3274

2757

3275

2758

client_class = Client

3276

2759

if use_dbus:

3277

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

3278

2760

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

2761

3279

2762

client_settings = Client.config_parser(client_config)

3280

2763

old_client_settings = {}

3281

2764

clients_data = {}

3282

2765

3283

2766

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

3284

2767

global wnull

3285

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

2768

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

3286

2769

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

3287

2770

# mode

3288

2771

if debug or not foreground:

3289

2772

wnull.close()

3290

2773

3291

2774

# Get client data and settings from last running state.

3292

2775

if server_settings["restore"]:

3293

2776

try:

3294

2777

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

3295

if sys.version_info.major == 2:

3296

clients_data, old_client_settings = pickle.load(

3297

stored_state)

3298

else:

3299

bytes_clients_data, bytes_old_client_settings = (

3300

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

3301

# Fix bytes to strings

3302

# clients_data

3303

# .keys()

3304

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

3305

if isinstance(key, bytes)

3306

else key): value

3307

for key, value in

3308

bytes_clients_data.items()}

3309

del bytes_clients_data

3310

for key in clients_data:

3311

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

3312

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

3313

for k, v in

3314

clients_data[key].items()}

3315

clients_data[key] = value

3316

# .client_structure

3317

value["client_structure"] = [

3318

(s.decode("utf-8")

3319

if isinstance(s, bytes)

3320

else s) for s in

3321

value["client_structure"]]

3322

# .name, .host, and .checker_command

3323

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

3324

if isinstance(value[k], bytes):

3325

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

3326

if "key_id" not in value:

3327

value["key_id"] = ""

3328

elif "fingerprint" not in value:

3329

value["fingerprint"] = ""

3330

# old_client_settings

3331

# .keys()

3332

old_client_settings = {

3333

(key.decode("utf-8")

3334

if isinstance(key, bytes)

3335

else key): value

3336

for key, value in

3337

bytes_old_client_settings.items()}

3338

del bytes_old_client_settings

3339

# .host and .checker_command

3340

for value in old_client_settings.values():

3341

for attribute in ("host", "checker_command"):

3342

if isinstance(value[attribute], bytes):

3343

value[attribute] = (value[attribute]

3344

.decode("utf-8"))

2778

clients_data, old_client_settings = pickle.load(

2779

stored_state)

3345

2780

os.remove(stored_state_path)

3346

2781

except IOError as e:

3347

2782

if e.errno == errno.ENOENT:

3348

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

3349

" %s", os.strerror(e.errno))

2783

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

2784

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

3350

2785

else:

3351

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

3352

exc_info=e)

2786

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

2787

exc_info=e)

3353

2788

raise

3354

2789

except EOFError as e:

3355

log.warning("Could not load persistent state: EOFError:",

3356

exc_info=e)

3357

2790

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

2791

"EOFError:",

2792

exc_info=e)

2793

3358

2794

with PGPEngine() as pgp:

3359

2795

for client_name, client in clients_data.items():

3360

2796

# Skip removed clients

3361

2797

if client_name not in client_settings:

3362

2798

continue

3363

2799

3364

2800

# Decide which value to use after restoring saved state.

3365

2801

# We have three different values: Old config file,

3366

2802

# new config file, and saved state.

3377

2813

client[name] = value

3378

2814

except KeyError:

3379

2815

pass

3380

2816

3381

2817

# Clients who has passed its expire date can still be

3382

2818

# enabled if its last checker was successful. A Client

3383

2819

# whose checker succeeded before we stored its state is

3386

2822

if client["enabled"]:

3387

2823

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

3388

2824

if not client["last_checked_ok"]:

3389

log.warning("disabling client %s - Client"

3390

" never performed a successful"

3391

" checker", client_name)

2825

logger.warning(

2826

"disabling client {} - Client never "

2827

"performed a successful checker".format(

2828

client_name))

3392

2829

client["enabled"] = False

3393

2830

elif client["last_checker_status"] != 0:

3394

log.warning("disabling client %s - Client"

3395

" last checker failed with error"

3396

" code %s", client_name,

3397

client["last_checker_status"])

2831

logger.warning(

2832

"disabling client {} - Client last"

2833

" checker failed with error code"

2834

" {}".format(

2835

client_name,

2836

client["last_checker_status"]))

3398

2837

client["enabled"] = False

3399

2838

else:

3400

2839

client["expires"] = (

3401

2840

datetime.datetime.utcnow()

3402

2841

+ client["timeout"])

3403

log.debug("Last checker succeeded, keeping %s"

3404

" enabled", client_name)

2842

logger.debug("Last checker succeeded,"

2843

" keeping {} enabled".format(

2844

client_name))

3405

2845

try:

3406

2846

client["secret"] = pgp.decrypt(

3407

2847

client["encrypted_secret"],

3408

2848

client_settings[client_name]["secret"])

3409

2849

except PGPError:

3410

2850

# If decryption fails, we use secret from new settings

3411

log.debug("Failed to decrypt %s old secret",

3412

client_name)

2851

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

2852

client_name))

3413

2853

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

3414

2854

["secret"])

3415

2855

3416

2856

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

3417

2857

for client_name in (set(old_client_settings)

3418

2858

- set(client_settings)):

3420

2860

for client_name in (set(client_settings)

3421

2861

- set(old_client_settings)):

3422

2862

clients_data[client_name] = client_settings[client_name]

3423

2863

3424

2864

# Create all client objects

3425

2865

for client_name, client in clients_data.items():

3426

2866

tcp_server.clients[client_name] = client_class(

3427

name=client_name,

3428

settings=client,

3429

server_settings=server_settings)

3430

2867

name = client_name,

2868

settings = client,

2869

server_settings = server_settings)

2870

3431

2871

if not tcp_server.clients:

3432

log.warning("No clients defined")

3433

2872

logger.warning("No clients defined")

2873

3434

2874

if not foreground:

3435

2875

if pidfile is not None:

3436

2876

pid = os.getpid()

3438

2878

with pidfile:

3439

2879

print(pid, file=pidfile)

3440

2880

except IOError:

3441

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

3442

pidfilename, pid)

2881

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

2882

pidfilename, pid)

3443

2883

del pidfile

3444

2884

del pidfilename

3445

3446

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

3447

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3448

lambda: main_loop.quit() and False)

3449

2885

2886

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

2887

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

2888

3450

2889

if use_dbus:

3451

2890

3452

2891

@alternate_dbus_interfaces(

3453

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

2892

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

3454

2893

class MandosDBusService(DBusObjectWithObjectManager):

3455

2894

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

3456

2895

3457

2896

def __init__(self):

3458

2897

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

3459

2898

3460

2899

_interface = "se.recompile.Mandos"

3461

2900

3462

2901

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

3463

2902

def ClientAdded(self, objpath):

3464

2903

"D-Bus signal"

3465

2904

pass

3466

2905

3467

2906

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

3468

def ClientNotFound(self, key_id, address):

2907

def ClientNotFound(self, fingerprint, address):

3469

2908

"D-Bus signal"

3470

2909

pass

3471

2910

3472

2911

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

3473

2912

"true"})

3474

2913

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

3475

2914

def ClientRemoved(self, objpath, name):

3476

2915

"D-Bus signal"

3477

2916

pass

3478

2917

3479

2918

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

3480

2919

"true"})

3481

2920

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

3482

2921

def GetAllClients(self):

3483

2922

"D-Bus method"

3484

2923

return dbus.Array(c.dbus_object_path for c in

3485

tcp_server.clients.values())

3486

2924

tcp_server.clients.itervalues())

2925

3487

2926

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

3488

2927

"true"})

3489

2928

@dbus.service.method(_interface,

3491

2930

def GetAllClientsWithProperties(self):

3492

2931

"D-Bus method"

3493

2932

return dbus.Dictionary(

3494

{c.dbus_object_path: c.GetAll(

2933

{ c.dbus_object_path: c.GetAll(

3495

2934

"se.recompile.Mandos.Client")

3496

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

2935

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

3497

2936

signature="oa{sv}")

3498

2937

3499

2938

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

3500

2939

def RemoveClient(self, object_path):

3501

2940

"D-Bus method"

3502

for c in tcp_server.clients.values():

2941

for c in tcp_server.clients.itervalues():

3503

2942

if c.dbus_object_path == object_path:

3504

2943

del tcp_server.clients[c.name]

3505

2944

c.remove_from_connection()

3509

2948

self.client_removed_signal(c)

3510

2949

return

3511

2950

raise KeyError(object_path)

3512

2951

3513

2952

del _interface

3514

2953

3515

2954

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3516

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

2955

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

3517

2956

def GetManagedObjects(self):

3518

2957

"""D-Bus method"""

3519

2958

return dbus.Dictionary(

3520

{client.dbus_object_path:

3521

dbus.Dictionary(

3522

{interface: client.GetAll(interface)

3523

for interface in

3524

client._get_all_interface_names()})

3525

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

3526

2959

{ client.dbus_object_path:

2960

dbus.Dictionary(

2961

{ interface: client.GetAll(interface)

2962

for interface in

2963

client._get_all_interface_names()})

2964

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

2965

3527

2966

def client_added_signal(self, client):

3528

2967

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

3529

2968

if use_dbus:

3531

2970

self.InterfacesAdded(

3532

2971

client.dbus_object_path,

3533

2972

dbus.Dictionary(

3534

{interface: client.GetAll(interface)

3535

for interface in

3536

client._get_all_interface_names()}))

2973

{ interface: client.GetAll(interface)

2974

for interface in

2975

client._get_all_interface_names()}))

3537

2976

# Old signal

3538

2977

self.ClientAdded(client.dbus_object_path)

3539

2978

3540

2979

def client_removed_signal(self, client):

3541

2980

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

3542

2981

if use_dbus:

3547

2986

# Old signal

3548

2987

self.ClientRemoved(client.dbus_object_path,

3549

2988

client.name)

3550

2989

3551

2990

mandos_dbus_service = MandosDBusService()

3552

3553

# Save modules to variables to exempt the modules from being

3554

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

3555

mp = multiprocessing

3556

wn = wnull

3557

2991

3558

2992

def cleanup():

3559

2993

"Cleanup function; run on exit"

3560

2994

if zeroconf:

3561

2995

service.cleanup()

3562

3563

mp.active_children()

3564

wn.close()

2996

2997

multiprocessing.active_children()

2998

wnull.close()

3565

2999

if not (tcp_server.clients or client_settings):

3566

3000

return

3567

3001

3568

3002

# Store client before exiting. Secrets are encrypted with key

3569

3003

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

3570

3004

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

3571

3005

clients = {}

3572

3006

with PGPEngine() as pgp:

3573

for client in tcp_server.clients.values():

3007

for client in tcp_server.clients.itervalues():

3574

3008

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

3575

3009

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

3576

3010

key)

3577

3011

client_dict = {}

3578

3012

3579

3013

# A list of attributes that can not be pickled

3580

3014

# + secret.

3581

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

3582

"checker", "server_settings"}

3015

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

3016

"checker", "server_settings" }

3583

3017

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

3584

3018

.Object):

3585

3019

exclude.add(name)

3586

3020

3587

3021

client_dict["encrypted_secret"] = (client

3588

3022

.encrypted_secret)

3589

3023

for attr in client.client_structure:

3590

3024

if attr not in exclude:

3591

3025

client_dict[attr] = getattr(client, attr)

3592

3026

3593

3027

clients[client.name] = client_dict

3594

3028

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

3595

3029

3596

3030

try:

3597

3031

with tempfile.NamedTemporaryFile(

3598

mode="wb",

3032

mode='wb',

3599

3033

suffix=".pickle",

3600

prefix="clients-",

3034

prefix='clients-',

3601

3035

dir=os.path.dirname(stored_state_path),

3602

3036

delete=False) as stored_state:

3603

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

3604

protocol=2)

3037

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

3605

3038

tempname = stored_state.name

3606

3039

os.rename(tempname, stored_state_path)

3607

3040

except (IOError, OSError) as e:

3611

3044

except NameError:

3612

3045

pass

3613

3046

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

3614

log.warning("Could not save persistent state: %s",

3615

os.strerror(e.errno))

3047

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

3048

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

3616

3049

else:

3617

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

3618

exc_info=e)

3050

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

3051

exc_info=e)

3619

3052

raise

3620

3053

3621

3054

# Delete all clients, and settings from config

3622

3055

while tcp_server.clients:

3623

3056

name, client = tcp_server.clients.popitem()

3626

3059

# Don't signal the disabling

3627

3060

client.disable(quiet=True)

3628

3061

# Emit D-Bus signal for removal

3629

if use_dbus:

3630

mandos_dbus_service.client_removed_signal(client)

3062

mandos_dbus_service.client_removed_signal(client)

3631

3063

client_settings.clear()

3632

3064

3633

3065

atexit.register(cleanup)

3634

3635

for client in tcp_server.clients.values():

3066

3067

for client in tcp_server.clients.itervalues():

3636

3068

if use_dbus:

3637

3069

# Emit D-Bus signal for adding

3638

3070

mandos_dbus_service.client_added_signal(client)

3639

3071

# Need to initiate checking of clients

3640

3072

if client.enabled:

3641

client.init_checker(randomize_start=True)

3642

3073

client.init_checker()

3074

3643

3075

tcp_server.enable()

3644

3076

tcp_server.server_activate()

3645

3077

3646

3078

# Find out what port we got

3647

3079

if zeroconf:

3648

3080

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

3649

3081

if use_ipv6:

3650

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

3651

" scope_id %d", *tcp_server.socket.getsockname())

3082

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

3083

" flowinfo %d, scope_id %d",

3084

*tcp_server.socket.getsockname())

3652

3085

else: # IPv4

3653

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

3654

*tcp_server.socket.getsockname())

3655

3656

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

3657

3086

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

3087

*tcp_server.socket.getsockname())

3088

3089

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

3090

3658

3091

try:

3659

3092

if zeroconf:

3660

3093

# From the Avahi example code

3661

3094

try:

3662

3095

service.activate()

3663

3096

except dbus.exceptions.DBusException as error:

3664

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

3097

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

3665

3098

cleanup()

3666

3099

sys.exit(1)

3667

3100

# End of Avahi example code

3668

3669

GLib.io_add_watch(

3670

GLib.IOChannel.unix_new(tcp_server.fileno()),

3671

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3672

lambda *args, **kwargs: (tcp_server.handle_request

3673

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

3674

3675

log.debug("Starting main loop")

3101

3102

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

3103

lambda *args, **kwargs:

3104

(tcp_server.handle_request

3105

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

3106

3107

logger.debug("Starting main loop")

3676

3108

main_loop.run()

3677

3109

except AvahiError as error:

3678

log.critical("Avahi Error", exc_info=error)

3110

logger.critical("Avahi Error", exc_info=error)

3679

3111

cleanup()

3680

3112

sys.exit(1)

3681

3113

except KeyboardInterrupt:

3682

3114

if debug:

3683

3115

print("", file=sys.stderr)

3684

log.debug("Server received KeyboardInterrupt")

3685

log.debug("Server exiting")

3116

logger.debug("Server received KeyboardInterrupt")

3117

logger.debug("Server exiting")

3686

3118

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

3687

3119

cleanup()

3688

3120

3689

3690

def parse_test_args():

3691

# type: () -> argparse.Namespace

3692

parser = argparse.ArgumentParser(add_help=False)

3693

parser.add_argument("--check", action="store_true")

3694

parser.add_argument("--prefix", )

3695

args, unknown_args = parser.parse_known_args()

3696

if args.check:

3697

# Remove test options from sys.argv

3698

sys.argv[1:] = unknown_args

3699

return args

3700

3701

# Add all tests from doctest strings

3702

def load_tests(loader, tests, none):

3703

import doctest

3704

tests.addTests(doctest.DocTestSuite())

3705

return tests

3706

3707

if __name__ == "__main__":

3708

options = parse_test_args()

3709

try:

3710

if options.check:

3711

extra_test_prefix = options.prefix

3712

if extra_test_prefix is not None:

3713

if not (unittest.main(argv=[""], exit=False)

3714

.result.wasSuccessful()):

3715

sys.exit(1)

3716

class ExtraTestLoader(unittest.TestLoader):

3717

testMethodPrefix = extra_test_prefix

3718

# Call using ./scriptname --test [--verbose]

3719

unittest.main(argv=[""], testLoader=ExtraTestLoader())

3720

else:

3721

unittest.main(argv=[""])

3722

else:

3723

main()

3724

finally:

3725

logging.shutdown()

3726

3727

# Local Variables:

3728

# run-tests:

3729

# (lambda (&optional extra)

3730

# (if (not (funcall run-tests-in-test-buffer default-directory

3731

# extra))

3732

# (funcall show-test-buffer-in-test-window)

3733

# (funcall remove-test-window)

3734

# (if extra (message "Extra tests run successfully!"))))

3735

# run-tests-in-test-buffer:

3736

# (lambda (dir &optional extra)

3737

# (with-current-buffer (get-buffer-create "*Test*")

3738

# (setq buffer-read-only nil

3739

# default-directory dir)

3740

# (erase-buffer)

3741

# (compilation-mode))

3742

# (let ((process-result

3743

# (let ((inhibit-read-only t))

3744

# (process-file-shell-command

3745

# (funcall get-command-line extra) nil "*Test*"))))

3746

# (and (numberp process-result)

3747

# (= process-result 0))))

3748

# get-command-line:

3749

# (lambda (&optional extra)

3750

# (let ((quoted-script

3751

# (shell-quote-argument (funcall get-script-name))))

3752

# (format

3753

# (concat "%s --check" (if extra " --prefix=atest" ""))

3754

# quoted-script)))

3755

# get-script-name:

3756

# (lambda ()

3757

# (if (fboundp 'file-local-name)

3758

# (file-local-name (buffer-file-name))

3759

# (or (file-remote-p (buffer-file-name) 'localname)

3760

# (buffer-file-name))))

3761

# remove-test-window:

3762

# (lambda ()

3763

# (let ((test-window (get-buffer-window "*Test*")))

3764

# (if test-window (delete-window test-window))))

3765

# show-test-buffer-in-test-window:

3766

# (lambda ()

3767

# (when (not (get-buffer-window-list "*Test*"))

3768

# (setq next-error-last-buffer (get-buffer "*Test*"))

3769

# (let* ((side (if (>= (window-width) 146) 'right 'bottom))

3770

# (display-buffer-overriding-action

3771

# `((display-buffer-in-side-window) (side . ,side)

3772

# (window-height . fit-window-to-buffer)

3773

# (window-width . fit-window-to-buffer))))

3774

# (display-buffer "*Test*"))))

3775

# eval:

3776

# (progn

3777

# (let* ((run-extra-tests (lambda () (interactive)

3778

# (funcall run-tests t)))

3779

# (inner-keymap `(keymap (116 . ,run-extra-tests))) ; t

3780

# (outer-keymap `(keymap (3 . ,inner-keymap)))) ; C-c

3781

# (setq minor-mode-overriding-map-alist

3782

# (cons `(run-tests . ,outer-keymap)

3783

# minor-mode-overriding-map-alist)))

3784

# (add-hook 'after-save-hook run-tests 90 t))

3785

# End:

3121

3122

if __name__ == '__main__':

3123

main()