/mandos/trunk : revision 237.4.56

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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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40

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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54

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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66

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:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.14"

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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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158

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def if_nametoindex(interface):

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=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

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == b"gpg":

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self.gpg = path

223

break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ["--batch",

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"--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

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self._cleanup()

244

175

245

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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,

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topdown=False):

180

topdown = False):

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for filename in files:

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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")

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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(" ", ""))

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

964

534

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

965

535

.replace(" ", ""))

966

536

if "secret" in section:

967

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

968

.encode("utf-8"),

969

"base64")

537

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

970

538

elif "secfile" in section:

971

539

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

972

540

(section["secfile"])),

987

555

client["last_approval_request"] = None

988

556

client["last_checked_ok"] = None

989

557

client["last_checker_status"] = -2

990

558

991

559

return settings

992

993

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

560

561

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

994

562

self.name = name

995

563

if server_settings is None:

996

564

server_settings = {}

998

566

# adding all client settings

999

567

for setting, value in settings.items():

1000

568

setattr(self, setting, value)

1001

569

1002

570

if self.enabled:

1003

571

if not hasattr(self, "last_enabled"):

1004

572

self.last_enabled = datetime.datetime.utcnow()

1008

576

else:

1009

577

self.last_enabled = None

1010

578

self.expires = None

1011

1012

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

1013

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

1014

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

579

580

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

581

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

1015

582

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

1016

583

datetime.datetime.utcnow())

1017

584

1018

585

# attributes specific for this server instance

1019

586

self.checker = None

1020

587

self.checker_initiator_tag = None

1026

593

self.changedstate = multiprocessing_manager.Condition(

1027

594

multiprocessing_manager.Lock())

1028

595

self.client_structure = [attr

1029

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

1030

597

if not attr.startswith("_")]

1031

598

self.client_structure.append("client_structure")

1032

599

1033

600

for name, t in inspect.getmembers(

1034

601

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

1035

602

if not name.startswith("_"):

1036

603

self.client_structure.append(name)

1037

604

1038

605

# Send notice to process children that client state has changed

1039

606

def send_changedstate(self):

1040

607

with self.changedstate:

1041

608

self.changedstate.notify_all()

1042

609

1043

610

def enable(self):

1044

611

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

1045

612

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

1050

617

self.last_enabled = datetime.datetime.utcnow()

1051

618

self.init_checker()

1052

619

self.send_changedstate()

1053

620

1054

621

def disable(self, quiet=True):

1055

622

"""Disable this client."""

1056

623

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

1057

624

return False

1058

625

if not quiet:

1059

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

626

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

1060

627

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

1061

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

1062

629

self.disable_initiator_tag = None

1063

630

self.expires = None

1064

631

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

1065

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

1066

633

self.checker_initiator_tag = None

1067

634

self.stop_checker()

1068

635

self.enabled = False

1069

636

if not quiet:

1070

637

self.send_changedstate()

1071

# 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

1072

639

return False

1073

640

1074

641

def __del__(self):

1075

642

self.disable()

1076

643

1077

644

def init_checker(self):

1078

645

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

1079

646

# and every interval from then on.

1080

647

if self.checker_initiator_tag is not None:

1081

GLib.source_remove(self.checker_initiator_tag)

1082

self.checker_initiator_tag = GLib.timeout_add(

1083

random.randrange(int(self.interval.total_seconds() * 1000

1084

+ 1)),

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

1085

651

self.start_checker)

1086

652

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

1087

653

if self.disable_initiator_tag is not None:

1088

GLib.source_remove(self.disable_initiator_tag)

1089

self.disable_initiator_tag = GLib.timeout_add(

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

1090

656

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

1091

657

# Also start a new checker *right now*.

1092

658

self.start_checker()

1093

659

1094

660

def checker_callback(self, source, condition, connection,

1095

661

command):

1096

662

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

663

self.checker_callback_tag = None

664

self.checker = None

1097

665

# Read return code from connection (see call_pipe)

1098

666

returncode = connection.recv()

1099

667

connection.close()

1100

if self.checker is not None:

1101

self.checker.join()

1102

self.checker_callback_tag = None

1103

self.checker = None

1104

668

1105

669

if returncode >= 0:

1106

670

self.last_checker_status = returncode

1107

671

self.last_checker_signal = None

1108

672

if self.last_checker_status == 0:

1109

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

673

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

674

vars(self))

1110

675

self.checked_ok()

1111

676

else:

1112

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

677

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

1113

678

else:

1114

679

self.last_checker_status = -1

1115

680

self.last_checker_signal = -returncode

1116

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

681

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

682

vars(self))

1117

683

return False

1118

684

1119

685

def checked_ok(self):

1120

686

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

1121

687

self.last_checked_ok = datetime.datetime.utcnow()

1122

688

self.last_checker_status = 0

1123

689

self.last_checker_signal = None

1124

690

self.bump_timeout()

1125

691

1126

692

def bump_timeout(self, timeout=None):

1127

693

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

1128

694

if timeout is None:

1129

695

timeout = self.timeout

1130

696

if self.disable_initiator_tag is not None:

1131

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

1132

698

self.disable_initiator_tag = None

1133

699

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

1134

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1135

701

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

1136

702

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

1137

703

1138

704

def need_approval(self):

1139

705

self.last_approval_request = datetime.datetime.utcnow()

1140

706

1141

707

def start_checker(self):

1142

708

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

1143

709

1144

710

If a checker already exists, leave it running and do

1145

711

nothing."""

1146

712

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

1151

717

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

1152

718

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

1153

719

# should be.

1154

720

1155

721

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

1156

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

722

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

1157

723

self.checker.join()

1158

724

self.checker = None

1159

725

# Start a new checker if needed

1160

726

if self.checker is None:

1161

727

# Escape attributes for the shell

1162

728

escaped_attrs = {

1163

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

1164

for attr in self.runtime_expansions}

729

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

730

for attr in self.runtime_expansions }

1165

731

try:

1166

732

command = self.checker_command % escaped_attrs

1167

733

except TypeError as error:

1168

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

1169

self.checker_command, exc_info=error)

734

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

735

self.checker_command,

736

exc_info=error)

1170

737

return True # Try again later

1171

738

self.current_checker_command = command

1172

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

739

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

740

self.name)

1173

741

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

1174

742

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

1175

743

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

1177

745

# The exception is when not debugging but nevertheless

1178

746

# running in the foreground; use the previously

1179

747

# created wnull.

1180

popen_args = {"close_fds": True,

1181

"shell": True,

1182

"cwd": "/"}

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1183

751

if (not self.server_settings["debug"]

1184

752

and self.server_settings["foreground"]):

1185

753

popen_args.update({"stdout": wnull,

1186

"stderr": wnull})

1187

pipe = multiprocessing.Pipe(duplex=False)

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1188

756

self.checker = multiprocessing.Process(

1189

target=call_pipe,

1190

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

1191

kwargs=popen_args)

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1192

760

self.checker.start()

1193

self.checker_callback_tag = GLib.io_add_watch(

1194

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

1195

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1196

763

self.checker_callback, pipe[0], command)

1197

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

764

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

1198

765

return True

1199

766

1200

767

def stop_checker(self):

1201

768

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

1202

769

if self.checker_callback_tag:

1203

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1204

771

self.checker_callback_tag = None

1205

772

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

1206

773

return

1207

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

774

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

1208

775

self.checker.terminate()

1209

776

self.checker = None

1210

777

1215

782

byte_arrays=False):

1216

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1217

784

become properties on the D-Bus.

1218

785

1219

786

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

1220

787

and with one argument by "Set".

1221

788

1222

789

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

1223

790

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

1224

791

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

1228

795

if byte_arrays and signature != "ay":

1229

796

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

1230

797

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

1231

798

1232

799

def decorator(func):

1233

800

func._dbus_is_property = True

1234

801

func._dbus_interface = dbus_interface

1237

804

func._dbus_name = func.__name__

1238

805

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

1239

806

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

1240

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1241

808

return func

1242

809

1243

810

return decorator

1244

811

1245

812

1246

813

def dbus_interface_annotations(dbus_interface):

1247

814

"""Decorator for marking functions returning interface annotations

1248

815

1249

816

Usage:

1250

817

1251

818

@dbus_interface_annotations("org.example.Interface")

1252

819

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

1253

820

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

1254

821

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

1255

822

"false"}

1256

823

"""

1257

824

1258

825

def decorator(func):

1259

826

func._dbus_is_interface = True

1260

827

func._dbus_interface = dbus_interface

1261

828

func._dbus_name = dbus_interface

1262

829

return func

1263

830

1264

831

return decorator

1265

832

1266

833

1267

834

def dbus_annotations(annotations):

1268

835

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

1269

836

Usage:

1270

837

1271

838

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

1272

839

"org.freedesktop.DBus.Property."

1273

840

"EmitsChangedSignal": "false"})

1275

842

access="r")

1276

843

def Property_dbus_property(self):

1277

844

return dbus.Boolean(False)

1278

845

1279

846

See also the DBusObjectWithAnnotations class.

1280

847

"""

1281

848

1282

849

def decorator(func):

1283

850

func._dbus_annotations = annotations

1284

851

return func

1285

852

1286

853

return decorator

1287

854

1288

855

1306

873

1307

874

class DBusObjectWithAnnotations(dbus.service.Object):

1308

875

"""A D-Bus object with annotations.

1309

876

1310

877

Classes inheriting from this can use the dbus_annotations

1311

878

decorator to add annotations to methods or signals.

1312

879

"""

1313

880

1314

881

@staticmethod

1315

882

def _is_dbus_thing(thing):

1316

883

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

1317

884

1318

885

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

1319

886

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

1320

887

"""

1321

888

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

1322

889

False)

1323

890

1324

891

def _get_all_dbus_things(self, thing):

1325

892

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

1326

893

"""

1329

896

for cls in self.__class__.__mro__

1330

897

for name, athing in

1331

898

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

1332

899

1333

900

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1334

out_signature="s",

1335

path_keyword="object_path",

1336

connection_keyword="connection")

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

1337

904

def Introspect(self, object_path, connection):

1338

905

"""Overloading of standard D-Bus method.

1339

906

1340

907

Inserts annotation tags on methods and signals.

1341

908

"""

1342

909

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

1343

910

connection)

1344

911

try:

1345

912

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

1346

913

1347

914

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

1348

915

# Add annotation tags

1349

916

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

1376

943

if_tag.appendChild(ann_tag)

1377

944

# Fix argument name for the Introspect method itself

1378

945

if (if_tag.getAttribute("name")

1379

== dbus.INTROSPECTABLE_IFACE):

946

== dbus.INTROSPECTABLE_IFACE):

1380

947

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

1381

948

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

1382

949

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

1388

955

document.unlink()

1389

956

except (AttributeError, xml.dom.DOMException,

1390

957

xml.parsers.expat.ExpatError) as error:

1391

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

1392

exc_info=error)

958

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

959

exc_info=error)

1393

960

return xmlstring

1394

961

1395

962

1396

963

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1397

964

"""A D-Bus object with properties.

1398

965

1399

966

Classes inheriting from this can use the dbus_service_property

1400

967

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

1401

968

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

1402

969

"""

1403

970

1404

971

def _get_dbus_property(self, interface_name, property_name):

1405

972

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

1406

973

property with the specified name and interface.

1411

978

if (value._dbus_name == property_name

1412

979

and value._dbus_interface == interface_name):

1413

980

return value.__get__(self)

1414

981

1415

982

# No such property

1416

983

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

1417

984

self.dbus_object_path, interface_name, property_name))

1418

985

1419

986

@classmethod

1420

987

def _get_all_interface_names(cls):

1421

988

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

1424

991

for x in (inspect.getmro(cls))

1425

992

for attr in dir(x))

1426

993

if name is not None)

1427

994

1428

995

@dbus.service.method(dbus.PROPERTIES_IFACE,

1429

996

in_signature="ss",

1430

997

out_signature="v")

1438

1005

if not hasattr(value, "variant_level"):

1439

1006

return value

1440

1007

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

1441

1008

1442

1009

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

1443

1010

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

1444

1011

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

1453

1020

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

1454

1021

"'ay' signature {!r}"

1455

1022

.format(prop._dbus_signature))

1456

value = dbus.ByteArray(bytes(value))

1023

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

1024

for byte in value))

1457

1025

prop(value)

1458

1026

1459

1027

@dbus.service.method(dbus.PROPERTIES_IFACE,

1460

1028

in_signature="s",

1461

1029

out_signature="a{sv}")

1462

1030

def GetAll(self, interface_name):

1463

1031

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

1464

1032

standard.

1465

1033

1466

1034

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

1467

1035

"""

1468

1036

properties = {}

1479

1047

properties[name] = value

1480

1048

continue

1481

1049

properties[name] = type(value)(

1482

value, variant_level=value.variant_level + 1)

1050

value, variant_level = value.variant_level + 1)

1483

1051

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

1484

1052

1485

1053

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

1486

1054

def PropertiesChanged(self, interface_name, changed_properties,

1487

1055

invalidated_properties):

1489

1057

standard.

1490

1058

"""

1491

1059

pass

1492

1060

1493

1061

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1494

1062

out_signature="s",

1495

path_keyword="object_path",

1496

connection_keyword="connection")

1063

path_keyword='object_path',

1064

connection_keyword='connection')

1497

1065

def Introspect(self, object_path, connection):

1498

1066

"""Overloading of standard D-Bus method.

1499

1067

1500

1068

Inserts property tags and interface annotation tags.

1501

1069

"""

1502

1070

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1504

1072

connection)

1505

1073

try:

1506

1074

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

1507

1075

1508

1076

def make_tag(document, name, prop):

1509

1077

e = document.createElement("property")

1510

1078

e.setAttribute("name", name)

1511

1079

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

1512

1080

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

1513

1081

return e

1514

1082

1515

1083

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

1516

1084

# Add property tags

1517

1085

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

1555

1123

document.unlink()

1556

1124

except (AttributeError, xml.dom.DOMException,

1557

1125

xml.parsers.expat.ExpatError) as error:

1558

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

1559

exc_info=error)

1126

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

1127

exc_info=error)

1560

1128

return xmlstring

1561

1129

1562

1563

1130

try:

1564

1131

dbus.OBJECT_MANAGER_IFACE

1565

1132

except AttributeError:

1566

1133

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

1567

1134

1568

1569

1135

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1570

1136

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

1571

1137

1572

1138

Classes inheriting from this exposes the standard

1573

1139

GetManagedObjects call and the InterfacesAdded and

1574

1140

InterfacesRemoved signals on the standard

1575

1141

"org.freedesktop.DBus.ObjectManager" interface.

1576

1142

1577

1143

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

1578

1144

manually.

1579

1145

"""

1580

1146

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1581

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

1147

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

1582

1148

def GetManagedObjects(self):

1583

1149

"""This function must be overridden"""

1584

1150

raise NotImplementedError()

1585

1151

1586

1152

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1587

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

1153

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

1588

1154

def InterfacesAdded(self, object_path, interfaces_and_properties):

1589

1155

pass

1590

1591

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

1156

1157

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

1592

1158

def InterfacesRemoved(self, object_path, interfaces):

1593

1159

pass

1594

1160

1595

1161

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1596

out_signature="s",

1597

path_keyword="object_path",

1598

connection_keyword="connection")

1162

out_signature = "s",

1163

path_keyword = 'object_path',

1164

connection_keyword = 'connection')

1599

1165

def Introspect(self, object_path, connection):

1600

1166

"""Overloading of standard D-Bus method.

1601

1167

1602

1168

Override return argument name of GetManagedObjects to be

1603

1169

"objpath_interfaces_and_properties"

1604

1170

"""

1607

1173

connection)

1608

1174

try:

1609

1175

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

1610

1176

1611

1177

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

1612

1178

# Fix argument name for the GetManagedObjects method

1613

1179

if (if_tag.getAttribute("name")

1614

== dbus.OBJECT_MANAGER_IFACE):

1180

== dbus.OBJECT_MANAGER_IFACE):

1615

1181

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

1616

1182

if (cn.getAttribute("name")

1617

1183

== "GetManagedObjects"):

1626

1192

document.unlink()

1627

1193

except (AttributeError, xml.dom.DOMException,

1628

1194

xml.parsers.expat.ExpatError) as error:

1629

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

1630

exc_info=error)

1195

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

1196

exc_info = error)

1631

1197

return xmlstring

1632

1198

1633

1634

1199

def datetime_to_dbus(dt, variant_level=0):

1635

1200

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

1636

1201

if dt is None:

1637

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

1202

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

1638

1203

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

1639

1204

1640

1205

1643

1208

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

1644

1209

interface names according to the "alt_interface_names" mapping.

1645

1210

Usage:

1646

1211

1647

1212

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

1648

1213

"net.example.AlternateInterface"})

1649

1214

class SampleDBusObject(dbus.service.Object):

1650

1215

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

1651

1216

def SampleDBusMethod():

1652

1217

pass

1653

1218

1654

1219

The above "SampleDBusMethod" on "SampleDBusObject" will be

1655

1220

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

1656

1221

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

1657

1222

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

1658

1223

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

1659

1224

1660

1225

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

1661

1226

(from DBusObjectWithProperties) and interfaces (from the

1662

1227

dbus_interface_annotations decorator).

1663

1228

"""

1664

1229

1665

1230

def wrapper(cls):

1666

1231

for orig_interface_name, alt_interface_name in (

1667

1232

alt_interface_names.items()):

1682

1247

interface_names.add(alt_interface)

1683

1248

# Is this a D-Bus signal?

1684

1249

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

1685

# Extract the original non-method undecorated

1686

# function by black magic

1687

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1688

1253

nonmethod_func = (dict(

1689

1254

zip(attribute.func_code.co_freevars,

1690

1255

attribute.__closure__))

1691

1256

["func"].cell_contents)

1692

1257

else:

1693

nonmethod_func = (dict(

1694

zip(attribute.__code__.co_freevars,

1695

attribute.__closure__))

1696

["func"].cell_contents)

1258

nonmethod_func = attribute

1697

1259

# Create a new, but exactly alike, function

1698

1260

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

1699

1261

# with the alternate D-Bus interface name

1700

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__)

1701

1276

new_function = (dbus.service.signal(

1702

1277

alt_interface,

1703

1278

attribute._dbus_signature)(new_function))

1707

1282

attribute._dbus_annotations)

1708

1283

except AttributeError:

1709

1284

pass

1710

1711

1285

# Define a creator of a function to call both the

1712

1286

# original and alternate functions, so both the

1713

1287

# original and alternate signals gets sent when

1716

1290

"""This function is a scope container to pass

1717

1291

func1 and func2 to the "call_both" function

1718

1292

outside of its arguments"""

1719

1293

1720

1294

@functools.wraps(func2)

1721

1295

def call_both(*args, **kwargs):

1722

1296

"""This function will emit two D-Bus

1723

1297

signals by calling func1 and func2"""

1724

1298

func1(*args, **kwargs)

1725

1299

func2(*args, **kwargs)

1726

# Make wrapper function look like a D-Bus

1727

# signal

1300

# Make wrapper function look like a D-Bus signal

1728

1301

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

1729

1302

if name.startswith("_dbus_"):

1730

1303

setattr(call_both, name, attr)

1731

1304

1732

1305

return call_both

1733

1306

# Create the "call_both" function and add it to

1734

1307

# the class

1744

1317

alt_interface,

1745

1318

attribute._dbus_in_signature,

1746

1319

attribute._dbus_out_signature)

1747

(copy_function(attribute)))

1320

(types.FunctionType(attribute.func_code,

1321

attribute.func_globals,

1322

attribute.func_name,

1323

attribute.func_defaults,

1324

attribute.func_closure)))

1748

1325

# Copy annotations, if any

1749

1326

try:

1750

1327

attr[attrname]._dbus_annotations = dict(

1762

1339

attribute._dbus_access,

1763

1340

attribute._dbus_get_args_options

1764

1341

["byte_arrays"])

1765

(copy_function(attribute)))

1342

(types.FunctionType(

1343

attribute.func_code,

1344

attribute.func_globals,

1345

attribute.func_name,

1346

attribute.func_defaults,

1347

attribute.func_closure)))

1766

1348

# Copy annotations, if any

1767

1349

try:

1768

1350

attr[attrname]._dbus_annotations = dict(

1777

1359

# to the class.

1778

1360

attr[attrname] = (

1779

1361

dbus_interface_annotations(alt_interface)

1780

(copy_function(attribute)))

1362

(types.FunctionType(attribute.func_code,

1363

attribute.func_globals,

1364

attribute.func_name,

1365

attribute.func_defaults,

1366

attribute.func_closure)))

1781

1367

if deprecate:

1782

1368

# Deprecate all alternate interfaces

1783

iname = "_AlternateDBusNames_interface_annotation{}"

1369

iname="_AlternateDBusNames_interface_annotation{}"

1784

1370

for interface_name in interface_names:

1785

1371

1786

1372

@dbus_interface_annotations(interface_name)

1787

1373

def func(self):

1788

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

1789

"true"}

1374

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

1375

"true" }

1790

1376

# Find an unused name

1791

1377

for aname in (iname.format(i)

1792

1378

for i in itertools.count()):

1796

1382

if interface_names:

1797

1383

# Replace the class with a new subclass of it with

1798

1384

# methods, signals, etc. as created above.

1799

if sys.version_info.major == 2:

1800

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

1801

(cls, ), attr)

1802

else:

1803

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

1804

(cls, ), attr)

1385

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

1386

(cls, ), attr)

1805

1387

return cls

1806

1388

1807

1389

return wrapper

1808

1390

1809

1391

1811

1393

"se.bsnet.fukt.Mandos"})

1812

1394

class ClientDBus(Client, DBusObjectWithProperties):

1813

1395

"""A Client class using D-Bus

1814

1396

1815

1397

Attributes:

1816

1398

dbus_object_path: dbus.ObjectPath

1817

1399

bus: dbus.SystemBus()

1818

1400

"""

1819

1401

1820

1402

runtime_expansions = (Client.runtime_expansions

1821

1403

+ ("dbus_object_path", ))

1822

1404

1823

1405

_interface = "se.recompile.Mandos.Client"

1824

1406

1825

1407

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

1826

1827

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

1408

1409

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

1828

1410

self.bus = bus

1829

1411

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

1830

1412

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

1836

1418

"/clients/" + client_object_name)

1837

1419

DBusObjectWithProperties.__init__(self, self.bus,

1838

1420

self.dbus_object_path)

1839

1421

1840

1422

def notifychangeproperty(transform_func, dbus_name,

1841

1423

type_func=lambda x: x,

1842

1424

variant_level=1,

1844

1426

_interface=_interface):

1845

1427

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

1846

1428

its changes to DBus.

1847

1429

1848

1430

transform_fun: Function that takes a value and a variant_level

1849

1431

and transforms it to a D-Bus type.

1850

1432

dbus_name: D-Bus name of the variable

1853

1435

variant_level: D-Bus variant level. Default: 1

1854

1436

"""

1855

1437

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

1856

1438

1857

1439

def setter(self, value):

1858

1440

if hasattr(self, "dbus_object_path"):

1859

1441

if (not hasattr(self, attrname) or

1866

1448

else:

1867

1449

dbus_value = transform_func(

1868

1450

type_func(value),

1869

variant_level=variant_level)

1451

variant_level = variant_level)

1870

1452

self.PropertyChanged(dbus.String(dbus_name),

1871

1453

dbus_value)

1872

1454

self.PropertiesChanged(

1873

1455

_interface,

1874

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

1875

dbus_value}),

1456

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

1457

dbus_value }),

1876

1458

dbus.Array())

1877

1459

setattr(self, attrname, value)

1878

1460

1879

1461

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

1880

1462

1881

1463

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1882

1464

approvals_pending = notifychangeproperty(dbus.Boolean,

1883

1465

"ApprovalPending",

1884

type_func=bool)

1466

type_func = bool)

1885

1467

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

1886

1468

last_enabled = notifychangeproperty(datetime_to_dbus,

1887

1469

"LastEnabled")

1888

1470

checker = notifychangeproperty(

1889

1471

dbus.Boolean, "CheckerRunning",

1890

type_func=lambda checker: checker is not None)

1472

type_func = lambda checker: checker is not None)

1891

1473

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1892

1474

"LastCheckedOK")

1893

1475

last_checker_status = notifychangeproperty(dbus.Int16,

1898

1480

"ApprovedByDefault")

1899

1481

approval_delay = notifychangeproperty(

1900

1482

dbus.UInt64, "ApprovalDelay",

1901

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

1483

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

1902

1484

approval_duration = notifychangeproperty(

1903

1485

dbus.UInt64, "ApprovalDuration",

1904

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

1486

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

1905

1487

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

1906

1488

timeout = notifychangeproperty(

1907

1489

dbus.UInt64, "Timeout",

1908

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

1490

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

1909

1491

extended_timeout = notifychangeproperty(

1910

1492

dbus.UInt64, "ExtendedTimeout",

1911

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

1493

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

1912

1494

interval = notifychangeproperty(

1913

1495

dbus.UInt64, "Interval",

1914

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

1496

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

1915

1497

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

1916

1498

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

1917

1499

invalidate_only=True)

1918

1500

1919

1501

del notifychangeproperty

1920

1502

1921

1503

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

1922

1504

try:

1923

1505

self.remove_from_connection()

1926

1508

if hasattr(DBusObjectWithProperties, "__del__"):

1927

1509

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

1928

1510

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

1929

1511

1930

1512

def checker_callback(self, source, condition,

1931

1513

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

1932

1514

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

1948

1530

| self.last_checker_signal),

1949

1531

dbus.String(command))

1950

1532

return ret

1951

1533

1952

1534

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

1953

1535

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

1954

1536

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

1958

1540

# Emit D-Bus signal

1959

1541

self.CheckerStarted(self.current_checker_command)

1960

1542

return r

1961

1543

1962

1544

def _reset_approved(self):

1963

1545

self.approved = None

1964

1546

return False

1965

1547

1966

1548

def approve(self, value=True):

1967

1549

self.approved = value

1968

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

1969

* 1000), self._reset_approved)

1550

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

1551

* 1000), self._reset_approved)

1970

1552

self.send_changedstate()

1971

1972

# D-Bus methods, signals & properties

1973

1974

# Interfaces

1975

1976

# Signals

1977

1553

1554

## D-Bus methods, signals & properties

1555

1556

## Interfaces

1557

1558

## Signals

1559

1978

1560

# CheckerCompleted - signal

1979

1561

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

1980

1562

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

1981

1563

"D-Bus signal"

1982

1564

pass

1983

1565

1984

1566

# CheckerStarted - signal

1985

1567

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

1986

1568

def CheckerStarted(self, command):

1987

1569

"D-Bus signal"

1988

1570

pass

1989

1571

1990

1572

# PropertyChanged - signal

1991

1573

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

1992

1574

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

1993

1575

def PropertyChanged(self, property, value):

1994

1576

"D-Bus signal"

1995

1577

pass

1996

1578

1997

1579

# GotSecret - signal

1998

1580

@dbus.service.signal(_interface)

1999

1581

def GotSecret(self):

2002

1584

server to mandos-client

2003

1585

"""

2004

1586

pass

2005

1587

2006

1588

# Rejected - signal

2007

1589

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

2008

1590

def Rejected(self, reason):

2009

1591

"D-Bus signal"

2010

1592

pass

2011

1593

2012

1594

# NeedApproval - signal

2013

1595

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

2014

1596

def NeedApproval(self, timeout, default):

2015

1597

"D-Bus signal"

2016

1598

return self.need_approval()

2017

2018

# Methods

2019

1599

1600

## Methods

1601

2020

1602

# Approve - method

2021

1603

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

2022

1604

def Approve(self, value):

2023

1605

self.approve(value)

2024

1606

2025

1607

# CheckedOK - method

2026

1608

@dbus.service.method(_interface)

2027

1609

def CheckedOK(self):

2028

1610

self.checked_ok()

2029

1611

2030

1612

# Enable - method

2031

1613

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

2032

1614

@dbus.service.method(_interface)

2033

1615

def Enable(self):

2034

1616

"D-Bus method"

2035

1617

self.enable()

2036

1618

2037

1619

# StartChecker - method

2038

1620

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

2039

1621

@dbus.service.method(_interface)

2040

1622

def StartChecker(self):

2041

1623

"D-Bus method"

2042

1624

self.start_checker()

2043

1625

2044

1626

# Disable - method

2045

1627

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

2046

1628

@dbus.service.method(_interface)

2047

1629

def Disable(self):

2048

1630

"D-Bus method"

2049

1631

self.disable()

2050

1632

2051

1633

# StopChecker - method

2052

1634

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

2053

1635

@dbus.service.method(_interface)

2054

1636

def StopChecker(self):

2055

1637

self.stop_checker()

2056

2057

# Properties

2058

1638

1639

## Properties

1640

2059

1641

# ApprovalPending - property

2060

1642

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

2061

1643

def ApprovalPending_dbus_property(self):

2062

1644

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

2063

1645

2064

1646

# ApprovedByDefault - property

2065

1647

@dbus_service_property(_interface,

2066

1648

signature="b",

2069

1651

if value is None: # get

2070

1652

return dbus.Boolean(self.approved_by_default)

2071

1653

self.approved_by_default = bool(value)

2072

1654

2073

1655

# ApprovalDelay - property

2074

1656

@dbus_service_property(_interface,

2075

1657

signature="t",

2079

1661

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

2080

1662

* 1000)

2081

1663

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

2082

1664

2083

1665

# ApprovalDuration - property

2084

1666

@dbus_service_property(_interface,

2085

1667

signature="t",

2089

1671

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

2090

1672

* 1000)

2091

1673

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

2092

1674

2093

1675

# Name - property

2094

1676

@dbus_annotations(

2095

1677

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

2096

1678

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

2097

1679

def Name_dbus_property(self):

2098

1680

return dbus.String(self.name)

2099

2100

# KeyID - property

2101

@dbus_annotations(

2102

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

2103

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

2104

def KeyID_dbus_property(self):

2105

return dbus.String(self.key_id)

2106

1681

2107

1682

# Fingerprint - property

2108

1683

@dbus_annotations(

2109

1684

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

2110

1685

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

2111

1686

def Fingerprint_dbus_property(self):

2112

1687

return dbus.String(self.fingerprint)

2113

1688

2114

1689

# Host - property

2115

1690

@dbus_service_property(_interface,

2116

1691

signature="s",

2119

1694

if value is None: # get

2120

1695

return dbus.String(self.host)

2121

1696

self.host = str(value)

2122

1697

2123

1698

# Created - property

2124

1699

@dbus_annotations(

2125

1700

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

2126

1701

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

2127

1702

def Created_dbus_property(self):

2128

1703

return datetime_to_dbus(self.created)

2129

1704

2130

1705

# LastEnabled - property

2131

1706

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

2132

1707

def LastEnabled_dbus_property(self):

2133

1708

return datetime_to_dbus(self.last_enabled)

2134

1709

2135

1710

# Enabled - property

2136

1711

@dbus_service_property(_interface,

2137

1712

signature="b",

2143

1718

self.enable()

2144

1719

else:

2145

1720

self.disable()

2146

1721

2147

1722

# LastCheckedOK - property

2148

1723

@dbus_service_property(_interface,

2149

1724

signature="s",

2153

1728

self.checked_ok()

2154

1729

return

2155

1730

return datetime_to_dbus(self.last_checked_ok)

2156

1731

2157

1732

# LastCheckerStatus - property

2158

1733

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

2159

1734

def LastCheckerStatus_dbus_property(self):

2160

1735

return dbus.Int16(self.last_checker_status)

2161

1736

2162

1737

# Expires - property

2163

1738

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

2164

1739

def Expires_dbus_property(self):

2165

1740

return datetime_to_dbus(self.expires)

2166

1741

2167

1742

# LastApprovalRequest - property

2168

1743

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

2169

1744

def LastApprovalRequest_dbus_property(self):

2170

1745

return datetime_to_dbus(self.last_approval_request)

2171

1746

2172

1747

# Timeout - property

2173

1748

@dbus_service_property(_interface,

2174

1749

signature="t",

2189

1764

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

2190

1765

is None):

2191

1766

return

2192

GLib.source_remove(self.disable_initiator_tag)

2193

self.disable_initiator_tag = GLib.timeout_add(

1767

gobject.source_remove(self.disable_initiator_tag)

1768

self.disable_initiator_tag = gobject.timeout_add(

2194

1769

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

2195

1770

self.disable)

2196

1771

2197

1772

# ExtendedTimeout - property

2198

1773

@dbus_service_property(_interface,

2199

1774

signature="t",

2203

1778

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

2204

1779

* 1000)

2205

1780

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

2206

1781

2207

1782

# Interval - property

2208

1783

@dbus_service_property(_interface,

2209

1784

signature="t",

2216

1791

return

2217

1792

if self.enabled:

2218

1793

# Reschedule checker run

2219

GLib.source_remove(self.checker_initiator_tag)

2220

self.checker_initiator_tag = GLib.timeout_add(

1794

gobject.source_remove(self.checker_initiator_tag)

1795

self.checker_initiator_tag = gobject.timeout_add(

2221

1796

value, self.start_checker)

2222

self.start_checker() # Start one now, too

2223

1797

self.start_checker() # Start one now, too

1798

2224

1799

# Checker - property

2225

1800

@dbus_service_property(_interface,

2226

1801

signature="s",

2229

1804

if value is None: # get

2230

1805

return dbus.String(self.checker_command)

2231

1806

self.checker_command = str(value)

2232

1807

2233

1808

# CheckerRunning - property

2234

1809

@dbus_service_property(_interface,

2235

1810

signature="b",

2241

1816

self.start_checker()

2242

1817

else:

2243

1818

self.stop_checker()

2244

1819

2245

1820

# ObjectPath - property

2246

1821

@dbus_annotations(

2247

1822

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

2248

1823

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

2249

1824

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

2250

1825

def ObjectPath_dbus_property(self):

2251

return self.dbus_object_path # is already a dbus.ObjectPath

2252

1826

return self.dbus_object_path # is already a dbus.ObjectPath

1827

2253

1828

# Secret = property

2254

1829

@dbus_annotations(

2255

1830

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

2260

1835

byte_arrays=True)

2261

1836

def Secret_dbus_property(self, value):

2262

1837

self.secret = bytes(value)

2263

1838

2264

1839

del _interface

2265

1840

2266

1841

2267

class ProxyClient:

2268

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

1842

class ProxyClient(object):

1843

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

2269

1844

self._pipe = child_pipe

2270

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

1845

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

2271

1846

if not self._pipe.recv():

2272

raise KeyError(key_id or fpr)

2273

1847

raise KeyError(fpr)

1848

2274

1849

def __getattribute__(self, name):

2275

if name == "_pipe":

1850

if name == '_pipe':

2276

1851

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

2277

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

1852

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

2278

1853

data = self._pipe.recv()

2279

if data[0] == "data":

1854

if data[0] == 'data':

2280

1855

return data[1]

2281

if data[0] == "function":

2282

1856

if data[0] == 'function':

1857

2283

1858

def func(*args, **kwargs):

2284

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

1859

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

2285

1860

return self._pipe.recv()[1]

2286

1861

2287

1862

return func

2288

1863

2289

1864

def __setattr__(self, name, value):

2290

if name == "_pipe":

1865

if name == '_pipe':

2291

1866

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

2292

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

1867

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

2293

1868

2294

1869

2295

1870

class ClientHandler(socketserver.BaseRequestHandler, object):

2296

1871

"""A class to handle client connections.

2297

1872

2298

1873

Instantiated once for each connection to handle it.

2299

1874

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

2300

1875

2301

1876

def handle(self):

2302

1877

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

2303

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

2304

str(self.client_address))

2305

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

2306

2307

session = gnutls.ClientSession(self.request)

2308

2309

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

2310

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

2311

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

2312

# "+DHE-DSS"))

1878

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

1879

str(self.client_address))

1880

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

1881

self.server.child_pipe.fileno())

1882

1883

session = gnutls.connection.ClientSession(

1884

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

1885

1886

# Note: gnutls.connection.X509Credentials is really a

1887

# generic GnuTLS certificate credentials object so long as

1888

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

1889

# here despite using OpenPGP certificates.

1890

1891

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

1892

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

1893

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

1894

# "+DHE-DSS"))

2313

1895

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

2314

1896

priority = self.server.gnutls_priority

2315

1897

if priority is None:

2316

1898

priority = "NORMAL"

2317

gnutls.priority_set_direct(session,

2318

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

2319

1899

gnutls.library.functions.gnutls_priority_set_direct(

1900

session._c_object, priority, None)

1901

2320

1902

# Start communication using the Mandos protocol

2321

1903

# Get protocol number

2322

1904

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

2323

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

1905

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

2324

1906

try:

2325

1907

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

2326

1908

raise RuntimeError(line)

2327

1909

except (ValueError, IndexError, RuntimeError) as error:

2328

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

1910

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

2329

1911

return

2330

1912

2331

1913

# Start GnuTLS connection

2332

1914

try:

2333

1915

session.handshake()

2334

except gnutls.Error as error:

2335

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

1916

except gnutls.errors.GNUTLSError as error:

1917

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

2336

1918

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

2337

1919

# established. Just abandon the request.

2338

1920

return

2339

log.debug("Handshake succeeded")

2340

1921

logger.debug("Handshake succeeded")

1922

2341

1923

approval_required = False

2342

1924

try:

2343

if gnutls.has_rawpk:

2344

fpr = b""

2345

try:

2346

key_id = self.key_id(

2347

self.peer_certificate(session))

2348

except (TypeError, gnutls.Error) as error:

2349

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

2350

return

2351

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

2352

key_id.decode("utf-8",

2353

errors="replace"))

2354

2355

else:

2356

key_id = b""

2357

try:

2358

fpr = self.fingerprint(

2359

self.peer_certificate(session))

2360

except (TypeError, gnutls.Error) as error:

2361

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

2362

return

2363

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

2364

2365

try:

2366

client = ProxyClient(child_pipe, key_id, fpr,

1925

try:

1926

fpr = self.fingerprint(

1927

self.peer_certificate(session))

1928

except (TypeError,

1929

gnutls.errors.GNUTLSError) as error:

1930

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

1931

return

1932

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

1933

1934

try:

1935

client = ProxyClient(child_pipe, fpr,

2367

1936

self.client_address)

2368

1937

except KeyError:

2369

1938

return

2370

1939

2371

1940

if client.approval_delay:

2372

1941

delay = client.approval_delay

2373

1942

client.approvals_pending += 1

2374

1943

approval_required = True

2375

1944

2376

1945

while True:

2377

1946

if not client.enabled:

2378

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

1947

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

1948

client.name)

2379

1949

if self.server.use_dbus:

2380

1950

# Emit D-Bus signal

2381

1951

client.Rejected("Disabled")

2382

1952

return

2383

1953

2384

1954

if client.approved or not client.approval_delay:

2385

# We are approved or approval is disabled

1955

#We are approved or approval is disabled

2386

1956

break

2387

1957

elif client.approved is None:

2388

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

2389

client.name)

1958

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

1959

client.name)

2390

1960

if self.server.use_dbus:

2391

1961

# Emit D-Bus signal

2392

1962

client.NeedApproval(

2393

1963

client.approval_delay.total_seconds()

2394

1964

* 1000, client.approved_by_default)

2395

1965

else:

2396

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

2397

client.name)

1966

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

1967

client.name)

2398

1968

if self.server.use_dbus:

2399

1969

# Emit D-Bus signal

2400

1970

client.Rejected("Denied")

2401

1971

return

2402

2403

# wait until timeout or approved

1972

1973

#wait until timeout or approved

2404

1974

time = datetime.datetime.now()

2405

1975

client.changedstate.acquire()

2406

1976

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

2408

1978

time2 = datetime.datetime.now()

2409

1979

if (time2 - time) >= delay:

2410

1980

if not client.approved_by_default:

2411

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

2412

" waiting for approval",

2413

client.name)

1981

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

1982

" waiting for approval",

1983

client.name)

2414

1984

if self.server.use_dbus:

2415

1985

# Emit D-Bus signal

2416

1986

client.Rejected("Approval timed out")

2419

1989

break

2420

1990

else:

2421

1991

delay -= time2 - time

2422

2423

try:

2424

session.send(client.secret)

2425

except gnutls.Error as error:

2426

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

2427

return

2428

2429

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

1992

1993

sent_size = 0

1994

while sent_size < len(client.secret):

1995

try:

1996

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

1997

except gnutls.errors.GNUTLSError as error:

1998

logger.warning("gnutls send failed",

1999

exc_info=error)

2000

return

2001

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

2002

len(client.secret) - (sent_size

2003

+ sent))

2004

sent_size += sent

2005

2006

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

2430

2007

# bump the timeout using extended_timeout

2431

2008

client.bump_timeout(client.extended_timeout)

2432

2009

if self.server.use_dbus:

2433

2010

# Emit D-Bus signal

2434

2011

client.GotSecret()

2435

2012

2436

2013

finally:

2437

2014

if approval_required:

2438

2015

client.approvals_pending -= 1

2439

2016

try:

2440

2017

session.bye()

2441

except gnutls.Error as error:

2442

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

2443

2018

except gnutls.errors.GNUTLSError as error:

2019

logger.warning("GnuTLS bye failed",

2020

exc_info=error)

2021

2444

2022

@staticmethod

2445

2023

def peer_certificate(session):

2446

"Return the peer's certificate as a bytestring"

2447

try:

2448

cert_type = gnutls.certificate_type_get2(

2449

session, gnutls.CTYPE_PEERS)

2450

except AttributeError:

2451

cert_type = gnutls.certificate_type_get(session)

2452

if gnutls.has_rawpk:

2453

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2454

else:

2455

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2456

# If not a valid certificate type...

2457

if cert_type not in valid_cert_types:

2458

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

2459

valid_cert_types)

2460

# ...return invalid data

2461

return b""

2024

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

2025

# If not an OpenPGP certificate...

2026

if (gnutls.library.functions.gnutls_certificate_type_get(

2027

session._c_object)

2028

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

2029

# ...do the normal thing

2030

return session.peer_certificate

2462

2031

list_size = ctypes.c_uint(1)

2463

cert_list = (gnutls.certificate_get_peers

2464

(session, ctypes.byref(list_size)))

2032

cert_list = (gnutls.library.functions

2033

.gnutls_certificate_get_peers

2034

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

2465

2035

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

2466

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

2036

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

2037

" certificate")

2467

2038

if list_size.value == 0:

2468

2039

return None

2469

2040

cert = cert_list[0]

2470

2041

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

2471

2472

@staticmethod

2473

def key_id(certificate):

2474

"Convert a certificate bytestring to a hexdigit key ID"

2475

# New GnuTLS "datum" with the public key

2476

datum = gnutls.datum_t(

2477

ctypes.cast(ctypes.c_char_p(certificate),

2478

ctypes.POINTER(ctypes.c_ubyte)),

2479

ctypes.c_uint(len(certificate)))

2480

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

2481

# New empty GnuTLS certificate

2482

pubkey = gnutls.pubkey_t()

2483

gnutls.pubkey_init(ctypes.byref(pubkey))

2484

# Import the raw public key into the certificate

2485

gnutls.pubkey_import(pubkey,

2486

ctypes.byref(datum),

2487

gnutls.X509_FMT_DER)

2488

# New buffer for the key ID

2489

buf = ctypes.create_string_buffer(32)

2490

buf_len = ctypes.c_size_t(len(buf))

2491

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

2492

gnutls.pubkey_get_key_id(

2493

pubkey,

2494

gnutls.KEYID_USE_SHA256,

2495

ctypes.cast(ctypes.byref(buf),

2496

ctypes.POINTER(ctypes.c_ubyte)),

2497

ctypes.byref(buf_len))

2498

# Deinit the certificate

2499

gnutls.pubkey_deinit(pubkey)

2500

2501

# Convert the buffer to a Python bytestring

2502

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

2503

# Convert the bytestring to hexadecimal notation

2504

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

2505

return hex_key_id

2506

2042

2507

2043

@staticmethod

2508

2044

def fingerprint(openpgp):

2509

2045

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2510

2046

# New GnuTLS "datum" with the OpenPGP public key

2511

datum = gnutls.datum_t(

2047

datum = gnutls.library.types.gnutls_datum_t(

2512

2048

ctypes.cast(ctypes.c_char_p(openpgp),

2513

2049

ctypes.POINTER(ctypes.c_ubyte)),

2514

2050

ctypes.c_uint(len(openpgp)))

2515

2051

# New empty GnuTLS certificate

2516

crt = gnutls.openpgp_crt_t()

2517

gnutls.openpgp_crt_init(ctypes.byref(crt))

2052

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2053

gnutls.library.functions.gnutls_openpgp_crt_init(

2054

ctypes.byref(crt))

2518

2055

# Import the OpenPGP public key into the certificate

2519

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

2520

gnutls.OPENPGP_FMT_RAW)

2056

gnutls.library.functions.gnutls_openpgp_crt_import(

2057

crt, ctypes.byref(datum),

2058

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2521

2059

# Verify the self signature in the key

2522

2060

crtverify = ctypes.c_uint()

2523

gnutls.openpgp_crt_verify_self(crt, 0,

2524

ctypes.byref(crtverify))

2061

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2062

crt, 0, ctypes.byref(crtverify))

2525

2063

if crtverify.value != 0:

2526

gnutls.openpgp_crt_deinit(crt)

2527

raise gnutls.CertificateSecurityError(code

2528

=crtverify.value)

2064

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2065

raise gnutls.errors.CertificateSecurityError(

2066

"Verify failed")

2529

2067

# New buffer for the fingerprint

2530

2068

buf = ctypes.create_string_buffer(20)

2531

2069

buf_len = ctypes.c_size_t()

2532

2070

# Get the fingerprint from the certificate into the buffer

2533

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

2534

ctypes.byref(buf_len))

2071

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2072

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

2535

2073

# Deinit the certificate

2536

gnutls.openpgp_crt_deinit(crt)

2074

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2537

2075

# Convert the buffer to a Python bytestring

2538

2076

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

2539

2077

# Convert the bytestring to hexadecimal notation

2541

2079

return hex_fpr

2542

2080

2543

2081

2544

class MultiprocessingMixIn:

2082

class MultiprocessingMixIn(object):

2545

2083

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

2546

2084

2547

2085

def sub_process_main(self, request, address):

2548

2086

try:

2549

2087

self.finish_request(request, address)

2550

2088

except Exception:

2551

2089

self.handle_error(request, address)

2552

2090

self.close_request(request)

2553

2091

2554

2092

def process_request(self, request, address):

2555

2093

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

2556

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

2557

args=(request, address))

2094

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

2095

args = (request, address))

2558

2096

proc.start()

2559

2097

return proc

2560

2098

2561

2099

2562

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2100

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2563

2101

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

2564

2102

2565

2103

def process_request(self, request, client_address):

2566

2104

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

2567

2105

2568

2106

This function creates a new pipe in self.pipe

2569

2107

"""

2570

2108

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2571

2109

2572

2110

proc = MultiprocessingMixIn.process_request(self, request,

2573

2111

client_address)

2574

2112

self.child_pipe.close()

2575

2113

self.add_pipe(parent_pipe, proc)

2576

2114

2577

2115

def add_pipe(self, parent_pipe, proc):

2578

2116

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

2579

2117

raise NotImplementedError()

2580

2118

2581

2119

2582

2120

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2583

socketserver.TCPServer):

2584

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

2585

2121

socketserver.TCPServer, object):

2122

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

2123

2586

2124

Attributes:

2587

2125

enabled: Boolean; whether this server is activated yet

2588

2126

interface: None or a network interface name (string)

2589

2127

use_ipv6: Boolean; to use IPv6 or not

2590

2128

"""

2591

2129

2592

2130

def __init__(self, server_address, RequestHandlerClass,

2593

2131

interface=None,

2594

2132

use_ipv6=True,

2604

2142

self.socketfd = socketfd

2605

2143

# Save the original socket.socket() function

2606

2144

self.socket_socket = socket.socket

2607

2608

2145

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

2609

#

2146

#

2610

2147

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

2611

2148

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

2612

2149

# patching socket.socket.)

2613

#

2150

#

2614

2151

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

2615

2152

@functools.wraps(socket.socket)

2616

2153

def socket_wrapper(*args, **kwargs):

2628

2165

# socket_wrapper(), if socketfd was set.

2629

2166

socketserver.TCPServer.__init__(self, server_address,

2630

2167

RequestHandlerClass)

2631

2168

2632

2169

def server_bind(self):

2633

2170

"""This overrides the normal server_bind() function

2634

2171

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

2635

2172

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

2636

global SO_BINDTODEVICE

2637

2173

if self.interface is not None:

2638

2174

if SO_BINDTODEVICE is None:

2639

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

2640

# common enough.

2641

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

2642

SO_BINDTODEVICE = 25

2643

try:

2644

self.socket.setsockopt(

2645

socket.SOL_SOCKET, SO_BINDTODEVICE,

2646

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

2647

except socket.error as error:

2648

if error.errno == errno.EPERM:

2649

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

2650

self.interface)

2651

elif error.errno == errno.ENOPROTOOPT:

2652

log.error("SO_BINDTODEVICE not available; cannot"

2653

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

2654

elif error.errno == errno.ENODEV:

2655

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

2656

" bind", self.interface)

2657

else:

2658

raise

2175

logger.error("SO_BINDTODEVICE does not exist;"

2176

" cannot bind to interface %s",

2177

self.interface)

2178

else:

2179

try:

2180

self.socket.setsockopt(

2181

socket.SOL_SOCKET, SO_BINDTODEVICE,

2182

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

2183

except socket.error as error:

2184

if error.errno == errno.EPERM:

2185

logger.error("No permission to bind to"

2186

" interface %s", self.interface)

2187

elif error.errno == errno.ENOPROTOOPT:

2188

logger.error("SO_BINDTODEVICE not available;"

2189

" cannot bind to interface %s",

2190

self.interface)

2191

elif error.errno == errno.ENODEV:

2192

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

2193

" cannot bind", self.interface)

2194

else:

2195

raise

2659

2196

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

2660

2197

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

2661

if self.server_address[1]:

2662

self.allow_reuse_address = True

2663

2198

if not self.server_address[0]:

2664

2199

if self.address_family == socket.AF_INET6:

2665

any_address = "::" # in6addr_any

2200

any_address = "::" # in6addr_any

2666

2201

else:

2667

any_address = "0.0.0.0" # INADDR_ANY

2202

any_address = "0.0.0.0" # INADDR_ANY

2668

2203

self.server_address = (any_address,

2669

2204

self.server_address[1])

2670

2205

elif not self.server_address[1]:

2680

2215

2681

2216

class MandosServer(IPv6_TCPServer):

2682

2217

"""Mandos server.

2683

2218

2684

2219

Attributes:

2685

2220

clients: set of Client objects

2686

2221

gnutls_priority GnuTLS priority string

2687

2222

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

2688

2689

Assumes a GLib.MainLoop event loop.

2223

2224

Assumes a gobject.MainLoop event loop.

2690

2225

"""

2691

2226

2692

2227

def __init__(self, server_address, RequestHandlerClass,

2693

2228

interface=None,

2694

2229

use_ipv6=True,

2704

2239

self.gnutls_priority = gnutls_priority

2705

2240

IPv6_TCPServer.__init__(self, server_address,

2706

2241

RequestHandlerClass,

2707

interface=interface,

2708

use_ipv6=use_ipv6,

2709

socketfd=socketfd)

2710

2242

interface = interface,

2243

use_ipv6 = use_ipv6,

2244

socketfd = socketfd)

2245

2711

2246

def server_activate(self):

2712

2247

if self.enabled:

2713

2248

return socketserver.TCPServer.server_activate(self)

2714

2249

2715

2250

def enable(self):

2716

2251

self.enabled = True

2717

2252

2718

2253

def add_pipe(self, parent_pipe, proc):

2719

2254

# Call "handle_ipc" for both data and EOF events

2720

GLib.io_add_watch(

2721

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

2722

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

2255

gobject.io_add_watch(

2256

parent_pipe.fileno(),

2257

gobject.IO_IN | gobject.IO_HUP,

2723

2258

functools.partial(self.handle_ipc,

2724

parent_pipe=parent_pipe,

2725

proc=proc))

2726

2259

parent_pipe = parent_pipe,

2260

proc = proc))

2261

2727

2262

def handle_ipc(self, source, condition,

2728

2263

parent_pipe=None,

2729

proc=None,

2264

proc = None,

2730

2265

client_object=None):

2731

2266

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

2732

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

2267

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

2733

2268

# Wait for other process to exit

2734

2269

proc.join()

2735

2270

return False

2736

2271

2737

2272

# Read a request from the child

2738

2273

request = parent_pipe.recv()

2739

2274

command = request[0]

2740

2741

if command == "init":

2742

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

2743

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

2744

address = request[3]

2745

2746

for c in self.clients.values():

2747

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2748

"27AE41E4649B934CA495991B7852B855"):

2749

continue

2750

if key_id and c.key_id == key_id:

2751

client = c

2752

break

2753

if fpr and c.fingerprint == fpr:

2275

2276

if command == 'init':

2277

fpr = request[1]

2278

address = request[2]

2279

2280

for c in self.clients.itervalues():

2281

if c.fingerprint == fpr:

2754

2282

client = c

2755

2283

break

2756

2284

else:

2757

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

2758

" %s", key_id or fpr, address)

2285

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

2286

"dress: %s", fpr, address)

2759

2287

if self.use_dbus:

2760

2288

# Emit D-Bus signal

2761

mandos_dbus_service.ClientNotFound(key_id or fpr,

2289

mandos_dbus_service.ClientNotFound(fpr,

2762

2290

address[0])

2763

2291

parent_pipe.send(False)

2764

2292

return False

2765

2766

GLib.io_add_watch(

2767

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

2768

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

2293

2294

gobject.io_add_watch(

2295

parent_pipe.fileno(),

2296

gobject.IO_IN | gobject.IO_HUP,

2769

2297

functools.partial(self.handle_ipc,

2770

parent_pipe=parent_pipe,

2771

proc=proc,

2772

client_object=client))

2298

parent_pipe = parent_pipe,

2299

proc = proc,

2300

client_object = client))

2773

2301

parent_pipe.send(True)

2774

2302

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

2775

2303

# same fileno

2776

2304

return False

2777

if command == "funcall":

2305

if command == 'funcall':

2778

2306

funcname = request[1]

2779

2307

args = request[2]

2780

2308

kwargs = request[3]

2781

2782

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

2309

2310

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

2783

2311

funcname)(*args,

2784

2312

**kwargs)))

2785

2786

if command == "getattr":

2313

2314

if command == 'getattr':

2787

2315

attrname = request[1]

2788

2316

if isinstance(client_object.__getattribute__(attrname),

2789

collections.abc.Callable):

2790

parent_pipe.send(("function", ))

2317

collections.Callable):

2318

parent_pipe.send(('function', ))

2791

2319

else:

2792

2320

parent_pipe.send((

2793

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

2794

2795

if command == "setattr":

2321

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

2322

2323

if command == 'setattr':

2796

2324

attrname = request[1]

2797

2325

value = request[2]

2798

2326

setattr(client_object, attrname, value)

2799

2327

2800

2328

return True

2801

2329

2802

2330

2803

2331

def rfc3339_duration_to_delta(duration):

2804

2332

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

2805

2806

>>> timedelta = datetime.timedelta

2807

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

2808

True

2809

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

2810

True

2811

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

2812

True

2813

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

2814

True

2815

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

2816

True

2817

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

2818

True

2819

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

2820

True

2821

>>> del timedelta

2333

2334

>>> rfc3339_duration_to_delta("P7D")

2335

datetime.timedelta(7)

2336

>>> rfc3339_duration_to_delta("PT60S")

2337

datetime.timedelta(0, 60)

2338

>>> rfc3339_duration_to_delta("PT60M")

2339

datetime.timedelta(0, 3600)

2340

>>> rfc3339_duration_to_delta("PT24H")

2341

datetime.timedelta(1)

2342

>>> rfc3339_duration_to_delta("P1W")

2343

datetime.timedelta(7)

2344

>>> rfc3339_duration_to_delta("PT5M30S")

2345

datetime.timedelta(0, 330)

2346

>>> rfc3339_duration_to_delta("P1DT3M20S")

2347

datetime.timedelta(1, 200)

2822

2348

"""

2823

2349

2824

2350

# Parsing an RFC 3339 duration with regular expressions is not

2825

2351

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

2826

2352

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

2827

2353

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

2828

2354

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

2829

2355

# avoid excessive use of external libraries.

2830

2356

2831

2357

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

2832

2358

Token = collections.namedtuple("Token", (

2833

2359

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

2866

2392

frozenset((token_year, token_month,

2867

2393

token_day, token_time,

2868

2394

token_week)))

2869

# Define starting values:

2870

# Value so far

2871

value = datetime.timedelta()

2395

# Define starting values

2396

value = datetime.timedelta() # Value so far

2872

2397

found_token = None

2873

# Following valid tokens

2874

followers = frozenset((token_duration, ))

2875

# String left to parse

2876

s = duration

2398

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

2399

s = duration # String left to parse

2877

2400

# Loop until end token is found

2878

2401

while found_token is not token_end:

2879

2402

# Search for any currently valid tokens

2903

2426

2904

2427

def string_to_delta(interval):

2905

2428

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

2906

2907

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

2908

True

2909

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

2910

True

2911

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

2912

True

2913

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

2914

True

2915

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

2916

True

2917

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

2918

True

2429

2430

>>> string_to_delta('7d')

2431

datetime.timedelta(7)

2432

>>> string_to_delta('60s')

2433

datetime.timedelta(0, 60)

2434

>>> string_to_delta('60m')

2435

datetime.timedelta(0, 3600)

2436

>>> string_to_delta('24h')

2437

datetime.timedelta(1)

2438

>>> string_to_delta('1w')

2439

datetime.timedelta(7)

2440

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

2441

datetime.timedelta(0, 330)

2919

2442

"""

2920

2443

2921

2444

try:

2922

2445

return rfc3339_duration_to_delta(interval)

2923

2446

except ValueError:

2924

2447

pass

2925

2448

2926

2449

timevalue = datetime.timedelta(0)

2927

2450

for s in interval.split():

2928

2451

try:

2946

2469

return timevalue

2947

2470

2948

2471

2949

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

2472

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

2950

2473

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

2951

2474

2952

2475

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

2953

2476

if os.fork():

2954

2477

sys.exit()

2972

2495

2973

2496

2974

2497

def main():

2975

2498

2976

2499

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

2977

2500

# Parsing of options, both command line and config file

2978

2501

2979

2502

parser = argparse.ArgumentParser()

2980

2503

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

2981

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

2504

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

2982

2505

help="show version number and exit")

2983

2506

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

2984

2507

help="Bind to interface IF")

3020

2543

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

3021

2544

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

3022

2545

default=None)

3023

2546

3024

2547

options = parser.parse_args()

3025

2548

2549

if options.check:

2550

import doctest

2551

fail_count, test_count = doctest.testmod()

2552

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

2553

3026

2554

# Default values for config file for server-global settings

3027

if gnutls.has_rawpk:

3028

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

3029

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

3030

else:

3031

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

3032

":+SIGN-DSA-SHA256")

3033

server_defaults = {"interface": "",

3034

"address": "",

3035

"port": "",

3036

"debug": "False",

3037

"priority": priority,

3038

"servicename": "Mandos",

3039

"use_dbus": "True",

3040

"use_ipv6": "True",

3041

"debuglevel": "",

3042

"restore": "True",

3043

"socket": "",

3044

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

3045

"foreground": "False",

3046

"zeroconf": "True",

3047

}

3048

del priority

3049

2555

server_defaults = { "interface": "",

2556

"address": "",

2557

"port": "",

2558

"debug": "False",

2559

"priority":

2560

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

2561

":+SIGN-DSA-SHA256",

2562

"servicename": "Mandos",

2563

"use_dbus": "True",

2564

"use_ipv6": "True",

2565

"debuglevel": "",

2566

"restore": "True",

2567

"socket": "",

2568

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

2569

"foreground": "False",

2570

"zeroconf": "True",

2571

}

2572

3050

2573

# Parse config file for server-global settings

3051

server_config = configparser.ConfigParser(server_defaults)

2574

server_config = configparser.SafeConfigParser(server_defaults)

3052

2575

del server_defaults

3053

2576

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

3054

# Convert the ConfigParser object to a dict

2577

# Convert the SafeConfigParser object to a dict

3055

2578

server_settings = server_config.defaults()

3056

2579

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

3057

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

3058

"foreground", "zeroconf"):

2580

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

3059

2581

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

3060

2582

option)

3061

2583

if server_settings["port"]:

3071

2593

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

3072

2594

["socket"])

3073

2595

del server_config

3074

2596

3075

2597

# Override the settings from the config file with command line

3076

2598

# options, if set.

3077

2599

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

3095

2617

if server_settings["debug"]:

3096

2618

server_settings["foreground"] = True

3097

2619

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

3098

2620

3099

2621

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

3100

2622

3101

2623

if (not server_settings["zeroconf"]

3102

2624

and not (server_settings["port"]

3103

2625

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

3104

2626

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

3105

2627

3106

2628

# For convenience

3107

2629

debug = server_settings["debug"]

3108

2630

debuglevel = server_settings["debuglevel"]

3112

2634

stored_state_file)

3113

2635

foreground = server_settings["foreground"]

3114

2636

zeroconf = server_settings["zeroconf"]

3115

2637

3116

2638

if debug:

3117

2639

initlogger(debug, logging.DEBUG)

3118

2640

else:

3121

2643

else:

3122

2644

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

3123

2645

initlogger(debug, level)

3124

2646

3125

2647

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

3126

2648

syslogger.setFormatter(

3127

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

3128

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

2649

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

2650

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

3129

2651

server_settings["servicename"])))

3130

2652

3131

2653

# Parse config file with clients

3132

client_config = configparser.ConfigParser(Client.client_defaults)

2654

client_config = configparser.SafeConfigParser(Client

2655

.client_defaults)

3133

2656

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

3134

2657

"clients.conf"))

3135

2658

3136

2659

global mandos_dbus_service

3137

2660

mandos_dbus_service = None

3138

2661

3139

2662

socketfd = None

3140

2663

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

3141

2664

socketfd = server_settings["socket"]

3155

2678

try:

3156

2679

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

3157

2680

except IOError as e:

3158

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

3159

exc_info=e)

3160

3161

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

3162

("mandos", "mandos"),

3163

("nobody", "nogroup")):

2681

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

2682

exc_info=e)

2683

2684

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

3164

2685

try:

3165

2686

uid = pwd.getpwnam(name).pw_uid

3166

gid = pwd.getpwnam(group).pw_gid

2687

gid = pwd.getpwnam(name).pw_gid

3167

2688

break

3168

2689

except KeyError:

3169

2690

continue

3173

2694

try:

3174

2695

os.setgid(gid)

3175

2696

os.setuid(uid)

3176

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

3177

2697

except OSError as error:

3178

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

3179

os.strerror(error.errno))

3180

2698

if error.errno != errno.EPERM:

3181

2699

raise

3182

2700

3183

2701

if debug:

3184

2702

# Enable all possible GnuTLS debugging

3185

2703

3186

2704

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

3187

2705

# - GnuTLS manual

3188

gnutls.global_set_log_level(11)

3189

3190

@gnutls.log_func

2706

gnutls.library.functions.gnutls_global_set_log_level(11)

2707

2708

@gnutls.library.types.gnutls_log_func

3191

2709

def debug_gnutls(level, string):

3192

log.debug("GnuTLS: %s",

3193

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

3194

3195

gnutls.global_set_log_function(debug_gnutls)

3196

2710

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

2711

2712

gnutls.library.functions.gnutls_global_set_log_function(

2713

debug_gnutls)

2714

3197

2715

# Redirect stdin so all checkers get /dev/null

3198

2716

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

3199

2717

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

3200

2718

if null > 2:

3201

2719

os.close(null)

3202

2720

3203

2721

# Need to fork before connecting to D-Bus

3204

2722

if not foreground:

3205

2723

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

3206

2724

daemon()

3207

3208

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

3209

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

3210

# need to inform GLib that threads will be used.

3211

GLib.threads_init()

3212

2725

2726

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

2727

# need to inform gobject that threads will be used.

2728

gobject.threads_init()

2729

3213

2730

global main_loop

3214

2731

# From the Avahi example code

3215

2732

DBusGMainLoop(set_as_default=True)

3216

main_loop = GLib.MainLoop()

2733

main_loop = gobject.MainLoop()

3217

2734

bus = dbus.SystemBus()

3218

2735

# End of Avahi example code

3219

2736

if use_dbus:

3225

2742

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

3226

2743

do_not_queue=True)

3227

2744

except dbus.exceptions.DBusException as e:

3228

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

2745

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

3229

2746

use_dbus = False

3230

2747

server_settings["use_dbus"] = False

3231

2748

tcp_server.use_dbus = False

3232

2749

if zeroconf:

3233

2750

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3234

2751

service = AvahiServiceToSyslog(

3235

name=server_settings["servicename"],

3236

servicetype="_mandos._tcp",

3237

protocol=protocol,

3238

bus=bus)

2752

name = server_settings["servicename"],

2753

servicetype = "_mandos._tcp",

2754

protocol = protocol,

2755

bus = bus)

3239

2756

if server_settings["interface"]:

3240

2757

service.interface = if_nametoindex(

3241

2758

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

3242

2759

3243

2760

global multiprocessing_manager

3244

2761

multiprocessing_manager = multiprocessing.Manager()

3245

2762

3246

2763

client_class = Client

3247

2764

if use_dbus:

3248

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

3249

2765

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

2766

3250

2767

client_settings = Client.config_parser(client_config)

3251

2768

old_client_settings = {}

3252

2769

clients_data = {}

3253

2770

3254

2771

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

3255

2772

global wnull

3256

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

2773

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

3257

2774

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

3258

2775

# mode

3259

2776

if debug or not foreground:

3260

2777

wnull.close()

3261

2778

3262

2779

# Get client data and settings from last running state.

3263

2780

if server_settings["restore"]:

3264

2781

try:

3265

2782

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

3266

if sys.version_info.major == 2:

3267

clients_data, old_client_settings = pickle.load(

3268

stored_state)

3269

else:

3270

bytes_clients_data, bytes_old_client_settings = (

3271

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

3272

# Fix bytes to strings

3273

# clients_data

3274

# .keys()

3275

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

3276

if isinstance(key, bytes)

3277

else key): value

3278

for key, value in

3279

bytes_clients_data.items()}

3280

del bytes_clients_data

3281

for key in clients_data:

3282

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

3283

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

3284

for k, v in

3285

clients_data[key].items()}

3286

clients_data[key] = value

3287

# .client_structure

3288

value["client_structure"] = [

3289

(s.decode("utf-8")

3290

if isinstance(s, bytes)

3291

else s) for s in

3292

value["client_structure"]]

3293

# .name, .host, and .checker_command

3294

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

3295

if isinstance(value[k], bytes):

3296

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

3297

if "key_id" not in value:

3298

value["key_id"] = ""

3299

elif "fingerprint" not in value:

3300

value["fingerprint"] = ""

3301

# old_client_settings

3302

# .keys()

3303

old_client_settings = {

3304

(key.decode("utf-8")

3305

if isinstance(key, bytes)

3306

else key): value

3307

for key, value in

3308

bytes_old_client_settings.items()}

3309

del bytes_old_client_settings

3310

# .host and .checker_command

3311

for value in old_client_settings.values():

3312

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

3313

if isinstance(value[attribute], bytes):

3314

value[attribute] = (value[attribute]

3315

.decode("utf-8"))

2783

clients_data, old_client_settings = pickle.load(

2784

stored_state)

3316

2785

os.remove(stored_state_path)

3317

2786

except IOError as e:

3318

2787

if e.errno == errno.ENOENT:

3319

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

3320

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

2788

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

2789

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

3321

2790

else:

3322

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

3323

exc_info=e)

2791

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

2792

exc_info=e)

3324

2793

raise

3325

2794

except EOFError as e:

3326

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

3327

exc_info=e)

3328

2795

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

2796

"EOFError:",

2797

exc_info=e)

2798

3329

2799

with PGPEngine() as pgp:

3330

2800

for client_name, client in clients_data.items():

3331

2801

# Skip removed clients

3332

2802

if client_name not in client_settings:

3333

2803

continue

3334

2804

3335

2805

# Decide which value to use after restoring saved state.

3336

2806

# We have three different values: Old config file,

3337

2807

# new config file, and saved state.

3348

2818

client[name] = value

3349

2819

except KeyError:

3350

2820

pass

3351

2821

3352

2822

# Clients who has passed its expire date can still be

3353

2823

# enabled if its last checker was successful. A Client

3354

2824

# whose checker succeeded before we stored its state is

3357

2827

if client["enabled"]:

3358

2828

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

3359

2829

if not client["last_checked_ok"]:

3360

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

3361

" never performed a successful"

3362

" checker", client_name)

2830

logger.warning(

2831

"disabling client {} - Client never "

2832

"performed a successful checker".format(

2833

client_name))

3363

2834

client["enabled"] = False

3364

2835

elif client["last_checker_status"] != 0:

3365

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

3366

" last checker failed with error"

3367

" code %s", client_name,

3368

client["last_checker_status"])

2836

logger.warning(

2837

"disabling client {} - Client last"

2838

" checker failed with error code"

2839

" {}".format(

2840

client_name,

2841

client["last_checker_status"]))

3369

2842

client["enabled"] = False

3370

2843

else:

3371

2844

client["expires"] = (

3372

2845

datetime.datetime.utcnow()

3373

2846

+ client["timeout"])

3374

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

3375

" enabled", client_name)

2847

logger.debug("Last checker succeeded,"

2848

" keeping {} enabled".format(

2849

client_name))

3376

2850

try:

3377

2851

client["secret"] = pgp.decrypt(

3378

2852

client["encrypted_secret"],

3379

2853

client_settings[client_name]["secret"])

3380

2854

except PGPError:

3381

2855

# If decryption fails, we use secret from new settings

3382

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

3383

client_name)

2856

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

2857

client_name))

3384

2858

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

3385

2859

["secret"])

3386

2860

3387

2861

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

3388

2862

for client_name in (set(old_client_settings)

3389

2863

- set(client_settings)):

3391

2865

for client_name in (set(client_settings)

3392

2866

- set(old_client_settings)):

3393

2867

clients_data[client_name] = client_settings[client_name]

3394

2868

3395

2869

# Create all client objects

3396

2870

for client_name, client in clients_data.items():

3397

2871

tcp_server.clients[client_name] = client_class(

3398

name=client_name,

3399

settings=client,

3400

server_settings=server_settings)

3401

2872

name = client_name,

2873

settings = client,

2874

server_settings = server_settings)

2875

3402

2876

if not tcp_server.clients:

3403

log.warning("No clients defined")

3404

2877

logger.warning("No clients defined")

2878

3405

2879

if not foreground:

3406

2880

if pidfile is not None:

3407

2881

pid = os.getpid()

3409

2883

with pidfile:

3410

2884

print(pid, file=pidfile)

3411

2885

except IOError:

3412

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

3413

pidfilename, pid)

2886

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

2887

pidfilename, pid)

3414

2888

del pidfile

3415

2889

del pidfilename

3416

3417

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

3418

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3419

lambda: main_loop.quit() and False)

3420

2890

2891

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

2892

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

2893

3421

2894

if use_dbus:

3422

2895

3423

2896

@alternate_dbus_interfaces(

3424

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

2897

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

3425

2898

class MandosDBusService(DBusObjectWithObjectManager):

3426

2899

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

3427

2900

3428

2901

def __init__(self):

3429

2902

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

3430

2903

3431

2904

_interface = "se.recompile.Mandos"

3432

2905

3433

2906

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

3434

2907

def ClientAdded(self, objpath):

3435

2908

"D-Bus signal"

3436

2909

pass

3437

2910

3438

2911

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

3439

def ClientNotFound(self, key_id, address):

2912

def ClientNotFound(self, fingerprint, address):

3440

2913

"D-Bus signal"

3441

2914

pass

3442

2915

3443

2916

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

3444

2917

"true"})

3445

2918

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

3446

2919

def ClientRemoved(self, objpath, name):

3447

2920

"D-Bus signal"

3448

2921

pass

3449

2922

3450

2923

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

3451

2924

"true"})

3452

2925

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

3453

2926

def GetAllClients(self):

3454

2927

"D-Bus method"

3455

2928

return dbus.Array(c.dbus_object_path for c in

3456

tcp_server.clients.values())

3457

2929

tcp_server.clients.itervalues())

2930

3458

2931

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

3459

2932

"true"})

3460

2933

@dbus.service.method(_interface,

3462

2935

def GetAllClientsWithProperties(self):

3463

2936

"D-Bus method"

3464

2937

return dbus.Dictionary(

3465

{c.dbus_object_path: c.GetAll(

2938

{ c.dbus_object_path: c.GetAll(

3466

2939

"se.recompile.Mandos.Client")

3467

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

2940

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

3468

2941

signature="oa{sv}")

3469

2942

3470

2943

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

3471

2944

def RemoveClient(self, object_path):

3472

2945

"D-Bus method"

3473

for c in tcp_server.clients.values():

2946

for c in tcp_server.clients.itervalues():

3474

2947

if c.dbus_object_path == object_path:

3475

2948

del tcp_server.clients[c.name]

3476

2949

c.remove_from_connection()

3480

2953

self.client_removed_signal(c)

3481

2954

return

3482

2955

raise KeyError(object_path)

3483

2956

3484

2957

del _interface

3485

2958

3486

2959

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3487

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

2960

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

3488

2961

def GetManagedObjects(self):

3489

2962

"""D-Bus method"""

3490

2963

return dbus.Dictionary(

3491

{client.dbus_object_path:

3492

dbus.Dictionary(

3493

{interface: client.GetAll(interface)

3494

for interface in

3495

client._get_all_interface_names()})

3496

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

3497

2964

{ client.dbus_object_path:

2965

dbus.Dictionary(

2966

{ interface: client.GetAll(interface)

2967

for interface in

2968

client._get_all_interface_names()})

2969

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

2970

3498

2971

def client_added_signal(self, client):

3499

2972

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

3500

2973

if use_dbus:

3502

2975

self.InterfacesAdded(

3503

2976

client.dbus_object_path,

3504

2977

dbus.Dictionary(

3505

{interface: client.GetAll(interface)

3506

for interface in

3507

client._get_all_interface_names()}))

2978

{ interface: client.GetAll(interface)

2979

for interface in

2980

client._get_all_interface_names()}))

3508

2981

# Old signal

3509

2982

self.ClientAdded(client.dbus_object_path)

3510

2983

3511

2984

def client_removed_signal(self, client):

3512

2985

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

3513

2986

if use_dbus:

3518

2991

# Old signal

3519

2992

self.ClientRemoved(client.dbus_object_path,

3520

2993

client.name)

3521

2994

3522

2995

mandos_dbus_service = MandosDBusService()

3523

3524

# Save modules to variables to exempt the modules from being

3525

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

3526

mp = multiprocessing

3527

wn = wnull

3528

2996

3529

2997

def cleanup():

3530

2998

"Cleanup function; run on exit"

3531

2999

if zeroconf:

3532

3000

service.cleanup()

3533

3534

mp.active_children()

3535

wn.close()

3001

3002

multiprocessing.active_children()

3003

wnull.close()

3536

3004

if not (tcp_server.clients or client_settings):

3537

3005

return

3538

3006

3539

3007

# Store client before exiting. Secrets are encrypted with key

3540

3008

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

3541

3009

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

3542

3010

clients = {}

3543

3011

with PGPEngine() as pgp:

3544

for client in tcp_server.clients.values():

3012

for client in tcp_server.clients.itervalues():

3545

3013

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

3546

3014

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

3547

3015

key)

3548

3016

client_dict = {}

3549

3017

3550

3018

# A list of attributes that can not be pickled

3551

3019

# + secret.

3552

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

3553

"checker", "server_settings"}

3020

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

3021

"checker", "server_settings" }

3554

3022

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

3555

3023

.Object):

3556

3024

exclude.add(name)

3557

3025

3558

3026

client_dict["encrypted_secret"] = (client

3559

3027

.encrypted_secret)

3560

3028

for attr in client.client_structure:

3561

3029

if attr not in exclude:

3562

3030

client_dict[attr] = getattr(client, attr)

3563

3031

3564

3032

clients[client.name] = client_dict

3565

3033

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

3566

3034

3567

3035

try:

3568

3036

with tempfile.NamedTemporaryFile(

3569

mode="wb",

3037

mode='wb',

3570

3038

suffix=".pickle",

3571

prefix="clients-",

3039

prefix='clients-',

3572

3040

dir=os.path.dirname(stored_state_path),

3573

3041

delete=False) as stored_state:

3574

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

3575

protocol=2)

3042

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

3576

3043

tempname = stored_state.name

3577

3044

os.rename(tempname, stored_state_path)

3578

3045

except (IOError, OSError) as e:

3582

3049

except NameError:

3583

3050

pass

3584

3051

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

3585

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

3586

os.strerror(e.errno))

3052

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

3053

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

3587

3054

else:

3588

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

3589

exc_info=e)

3055

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

3056

exc_info=e)

3590

3057

raise

3591

3058

3592

3059

# Delete all clients, and settings from config

3593

3060

while tcp_server.clients:

3594

3061

name, client = tcp_server.clients.popitem()

3597

3064

# Don't signal the disabling

3598

3065

client.disable(quiet=True)

3599

3066

# Emit D-Bus signal for removal

3600

if use_dbus:

3601

mandos_dbus_service.client_removed_signal(client)

3067

mandos_dbus_service.client_removed_signal(client)

3602

3068

client_settings.clear()

3603

3069

3604

3070

atexit.register(cleanup)

3605

3606

for client in tcp_server.clients.values():

3071

3072

for client in tcp_server.clients.itervalues():

3607

3073

if use_dbus:

3608

3074

# Emit D-Bus signal for adding

3609

3075

mandos_dbus_service.client_added_signal(client)

3610

3076

# Need to initiate checking of clients

3611

3077

if client.enabled:

3612

3078

client.init_checker()

3613

3079

3614

3080

tcp_server.enable()

3615

3081

tcp_server.server_activate()

3616

3082

3617

3083

# Find out what port we got

3618

3084

if zeroconf:

3619

3085

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

3620

3086

if use_ipv6:

3621

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

3622

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

3087

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

3088

" flowinfo %d, scope_id %d",

3089

*tcp_server.socket.getsockname())

3623

3090

else: # IPv4

3624

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

3625

*tcp_server.socket.getsockname())

3626

3627

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

3628

3091

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

3092

*tcp_server.socket.getsockname())

3093

3094

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

3095

3629

3096

try:

3630

3097

if zeroconf:

3631

3098

# From the Avahi example code

3632

3099

try:

3633

3100

service.activate()

3634

3101

except dbus.exceptions.DBusException as error:

3635

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

3102

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

3636

3103

cleanup()

3637

3104

sys.exit(1)

3638

3105

# End of Avahi example code

3639

3640

GLib.io_add_watch(

3641

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

3642

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3643

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

3644

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

3645

3646

log.debug("Starting main loop")

3106

3107

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

3108

lambda *args, **kwargs:

3109

(tcp_server.handle_request

3110

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

3111

3112

logger.debug("Starting main loop")

3647

3113

main_loop.run()

3648

3114

except AvahiError as error:

3649

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

3115

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

3650

3116

cleanup()

3651

3117

sys.exit(1)

3652

3118

except KeyboardInterrupt:

3653

3119

if debug:

3654

3120

print("", file=sys.stderr)

3655

log.debug("Server received KeyboardInterrupt")

3656

log.debug("Server exiting")

3121

logger.debug("Server received KeyboardInterrupt")

3122

logger.debug("Server exiting")

3657

3123

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

3658

3124

cleanup()

3659

3125

3660

3661

def parse_test_args():

3662

# type: () -> argparse.Namespace

3663

parser = argparse.ArgumentParser(add_help=False)

3664

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

3665

parser.add_argument("--prefix", )

3666

args, unknown_args = parser.parse_known_args()

3667

if args.check:

3668

# Remove test options from sys.argv

3669

sys.argv[1:] = unknown_args

3670

return args

3671

3672

# Add all tests from doctest strings

3673

def load_tests(loader, tests, none):

3674

import doctest

3675

tests.addTests(doctest.DocTestSuite())

3676

return tests

3677

3678

if __name__ == "__main__":

3679

options = parse_test_args()

3680

try:

3681

if options.check:

3682

extra_test_prefix = options.prefix

3683

if extra_test_prefix is not None:

3684

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

3685

.result.wasSuccessful()):

3686

sys.exit(1)

3687

class ExtraTestLoader(unittest.TestLoader):

3688

testMethodPrefix = extra_test_prefix

3689

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

3690

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

3691

else:

3692

unittest.main(argv=[""])

3693

else:

3694

main()

3695

finally:

3696

logging.shutdown()

3697

3698

# Local Variables:

3699

# run-tests:

3700

# (lambda (&optional extra)

3701

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

3702

# extra))

3703

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

3704

# (funcall remove-test-window)

3705

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

3706

# run-tests-in-test-buffer:

3707

# (lambda (dir &optional extra)

3708

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

3709

# (setq buffer-read-only nil

3710

# default-directory dir)

3711

# (erase-buffer)

3712

# (compilation-mode))

3713

# (let ((process-result

3714

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

3715

# (process-file-shell-command

3716

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

3717

# (and (numberp process-result)

3718

# (= process-result 0))))

3719

# get-command-line:

3720

# (lambda (&optional extra)

3721

# (let ((quoted-script

3722

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

3723

# (format

3724

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

3725

# quoted-script)))

3726

# get-script-name:

3727

# (lambda ()

3728

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

3729

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

3730

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

3731

# (buffer-file-name))))

3732

# remove-test-window:

3733

# (lambda ()

3734

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

3735

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

3736

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

3737

# (lambda ()

3738

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

3739

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

3740

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

3741

# (display-buffer-overriding-action

3742

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

3743

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

3744

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

3745

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

3746

# eval:

3747

# (progn

3748

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

3749

# (funcall run-tests t)))

3750

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

3751

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

3752

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

3753

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

3754

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

3755

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

3756

# End:

3126

3127

if __name__ == '__main__':

3128

main()