/mandos/trunk : revision 237.4.138

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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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#!/usr/bin/python3 -bI

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

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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15

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import 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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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import signal

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import subprocess

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import atexit

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import stat

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import logging

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import logging.handlers

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64

import pwd

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65

import contextlib

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import itertools

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import collections

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79

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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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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import gi

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from gi.repository import GLib

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87

from dbus.mainloop.glib import DBusGMainLoop

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88

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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92

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try:

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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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98

# 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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113

# 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")

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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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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.0"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.15"

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stored_state_file = "clients.pickle"

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148

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logger = logging.getLogger()

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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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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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157

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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)

176

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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183

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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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logger.addHandler(syslogger)

139

192

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

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" %(message)s"))

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log.addHandler(syslogger)

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140

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if debug:

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console = logging.StreamHandler()

142

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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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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204

149

205

150

206

class PGPError(Exception):

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pass

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209

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210

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class PGPEngine(object):

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class PGPEngine:

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

157

213

158

214

def __init__(self):

159

215

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

160

self.gnupgargs = ['--batch',

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'--home', self.tempdir,

162

'--force-mdc',

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'--quiet',

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'--no-use-agent']

165

216

self.gpg = "gpg"

217

try:

218

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

219

for line in output.splitlines():

220

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

221

if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ["--batch",

228

"--homedir", self.tempdir,

229

"--force-mdc",

230

"--quiet"]

231

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

232

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

233

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

234

166

235

def __enter__(self):

167

236

return self

168

237

169

238

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

170

239

self._cleanup()

171

240

return False

172

241

173

242

def __del__(self):

174

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self._cleanup()

175

244

176

245

def _cleanup(self):

177

246

if self.tempdir is not None:

178

247

# Delete contents of tempdir

179

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

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topdown = False):

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topdown=False):

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for filename in files:

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

183

252

for dirname in dirs:

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254

# Remove tempdir

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os.rmdir(self.tempdir)

187

256

self.tempdir = None

188

257

189

258

def password_encode(self, password):

190

259

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

191

260

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

196

265

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

197

266

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

198

267

return encoded

199

268

200

269

def encrypt(self, data, password):

201

270

passphrase = self.password_encode(password)

202

271

with tempfile.NamedTemporaryFile(

203

272

dir=self.tempdir) as passfile:

204

273

passfile.write(passphrase)

205

274

passfile.flush()

206

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

207

'--passphrase-file',

275

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

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"--passphrase-file",

208

277

passfile.name]

209

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+ self.gnupgargs,

210

stdin = subprocess.PIPE,

211

stdout = subprocess.PIPE,

212

stderr = subprocess.PIPE)

213

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

279

stdin=subprocess.PIPE,

280

stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

282

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

214

283

if proc.returncode != 0:

215

284

raise PGPError(err)

216

285

return ciphertext

217

286

218

287

def decrypt(self, data, password):

219

288

passphrase = self.password_encode(password)

220

289

with tempfile.NamedTemporaryFile(

221

dir = self.tempdir) as passfile:

290

dir=self.tempdir) as passfile:

222

291

passfile.write(passphrase)

223

292

passfile.flush()

224

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

225

'--passphrase-file',

293

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

294

"--passphrase-file",

226

295

passfile.name]

227

296

+ self.gnupgargs,

228

stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

232

301

if proc.returncode != 0:

233

302

raise PGPError(err)

234

303

return decrypted_plaintext

235

304

236

305

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

237

332

class AvahiError(Exception):

238

333

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

239

334

self.value = value

249

344

pass

250

345

251

346

252

class AvahiService(object):

347

class AvahiService:

253

348

"""An Avahi (Zeroconf) service.

254

349

255

350

Attributes:

256

351

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

257

352

Used to optionally bind to the specified interface.

258

name: string; Example: 'Mandos'

259

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

353

name: string; Example: "Mandos"

354

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

260

355

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

261

356

port: integer; what port to announce

262

357

TXT: list of strings; TXT record for the service

269

364

server: D-Bus Server

270

365

bus: dbus.SystemBus()

271

366

"""

272

367

273

368

def __init__(self,

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):

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):

284

379

self.interface = interface

285

380

self.name = name

286

381

self.type = servicetype

295

390

self.server = None

296

391

self.bus = bus

297

392

self.entry_group_state_changed_match = None

298

393

299

394

def rename(self, remove=True):

300

395

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

301

396

if self.rename_count >= self.max_renames:

302

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

303

" after %i retries, exiting.",

304

self.rename_count)

397

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

398

" after %i retries, exiting.",

399

self.rename_count)

305

400

raise AvahiServiceError("Too many renames")

306

401

self.name = str(

307

402

self.server.GetAlternativeServiceName(self.name))

308

403

self.rename_count += 1

309

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

310

self.name)

404

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

405

self.name)

311

406

if remove:

312

407

self.remove()

313

408

try:

315

410

except dbus.exceptions.DBusException as error:

316

411

if (error.get_dbus_name()

317

412

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

318

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

413

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

319

414

return self.rename(remove=False)

320

415

else:

321

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

416

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

322

417

self.cleanup()

323

418

os._exit(1)

324

419

325

420

def remove(self):

326

421

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

327

422

if self.entry_group_state_changed_match is not None:

329

424

self.entry_group_state_changed_match = None

330

425

if self.group is not None:

331

426

self.group.Reset()

332

427

333

428

def add(self):

334

429

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

335

430

self.remove()

340

435

avahi.DBUS_INTERFACE_ENTRY_GROUP)

341

436

self.entry_group_state_changed_match = (

342

437

self.group.connect_to_signal(

343

'StateChanged', self.entry_group_state_changed))

344

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

345

self.name, self.type)

438

"StateChanged", self.entry_group_state_changed))

439

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

440

self.name, self.type)

346

441

self.group.AddService(

347

442

self.interface,

348

443

self.protocol,

352

447

dbus.UInt16(self.port),

353

448

avahi.string_array_to_txt_array(self.TXT))

354

449

self.group.Commit()

355

450

356

451

def entry_group_state_changed(self, state, error):

357

452

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

358

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

359

453

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

454

360

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

361

logger.debug("Zeroconf service established.")

456

log.debug("Zeroconf service established.")

362

457

elif state == avahi.ENTRY_GROUP_COLLISION:

363

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

458

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

364

459

self.rename()

365

460

elif state == avahi.ENTRY_GROUP_FAILURE:

366

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

367

str(error))

461

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

462

str(error))

368

463

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

369

464

370

465

def cleanup(self):

371

466

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

372

467

if self.group is not None:

377

472

pass

378

473

self.group = None

379

474

self.remove()

380

475

381

476

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

382

477

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

383

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

478

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

384

479

bad_states = {

385

480

avahi.SERVER_INVALID: "Zeroconf server invalid",

386

481

avahi.SERVER_REGISTERING: None,

390

485

if state in bad_states:

391

486

if bad_states[state] is not None:

392

487

if error is None:

393

logger.error(bad_states[state])

488

log.error(bad_states[state])

394

489

else:

395

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

490

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

396

491

self.cleanup()

397

492

elif state == avahi.SERVER_RUNNING:

398

493

try:

400

495

except dbus.exceptions.DBusException as error:

401

496

if (error.get_dbus_name()

402

497

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

498

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

405

499

return self.rename(remove=False)

406

500

else:

407

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

501

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

408

502

self.cleanup()

409

503

os._exit(1)

410

504

else:

411

505

if error is None:

412

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

506

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

413

507

else:

414

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

415

508

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

509

416

510

def activate(self):

417

511

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

418

512

if self.server is None:

429

523

class AvahiServiceToSyslog(AvahiService):

430

524

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

431

525

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

432

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

526

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

527

**kwargs)

433

528

syslogger.setFormatter(logging.Formatter(

434

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

529

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

435

530

.format(self.name)))

436

531

return ret

437

532

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

438

863

def call_pipe(connection, # : multiprocessing.Connection

439

864

func, *args, **kwargs):

440

865

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

441

866

442

867

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

443

868

return value on the provided multiprocessing.Connection.

444

869

"""

445

870

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

446

871

connection.close()

447

872

448

class Client(object):

873

874

class Client:

449

875

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

450

876

451

877

Attributes:

452

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

878

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

453

879

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

454

880

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

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

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

459

885

checker_command: string; External command which is run to check

460

886

if client lives. %() expansions are done at

461

887

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

462

888

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

463

checker_initiator_tag: a gobject event source tag, or None

889

checker_initiator_tag: a GLib event source tag, or None

464

890

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

465

891

client_structure: Object describing what attributes a client has

466

892

and is used for storing the client at exit

467

893

current_checker_command: string; current running checker_command

468

disable_initiator_tag: a gobject event source tag, or None

894

disable_initiator_tag: a GLib event source tag, or None

469

895

enabled: bool()

470

896

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

471

uniquely identify the client

897

uniquely identify an OpenPGP client

898

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

899

a client using raw public keys

472

900

host: string; available for use by the checker command

473

901

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

474

902

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

490

918

disabled, or None

491

919

server_settings: The server_settings dict from main()

492

920

"""

493

921

494

922

runtime_expansions = ("approval_delay", "approval_duration",

495

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

923

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

496

924

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

497

925

"last_approval_request", "last_checked_ok",

498

926

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

507

935

"approved_by_default": "True",

508

936

"enabled": "True",

509

937

}

510

938

511

939

@staticmethod

512

940

def config_parser(config):

513

941

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

520

948

for client_name in config.sections():

521

949

section = dict(config.items(client_name))

522

950

client = settings[client_name] = {}

523

951

524

952

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

525

953

# Reformat values from string types to Python types

526

954

client["approved_by_default"] = config.getboolean(

527

955

client_name, "approved_by_default")

528

956

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

529

957

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

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(" ", ""))

534

964

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

535

965

.replace(" ", ""))

536

966

if "secret" in section:

537

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

967

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

968

.encode("utf-8"),

969

"base64")

538

970

elif "secfile" in section:

539

971

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

540

972

(section["secfile"])),

555

987

client["last_approval_request"] = None

556

988

client["last_checked_ok"] = None

557

989

client["last_checker_status"] = -2

558

990

559

991

return settings

560

561

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

992

993

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

562

994

self.name = name

563

995

if server_settings is None:

564

996

server_settings = {}

566

998

# adding all client settings

567

999

for setting, value in settings.items():

568

1000

setattr(self, setting, value)

569

1001

570

1002

if self.enabled:

571

1003

if not hasattr(self, "last_enabled"):

572

1004

self.last_enabled = datetime.datetime.utcnow()

576

1008

else:

577

1009

self.last_enabled = None

578

1010

self.expires = None

579

580

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

581

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

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)

582

1015

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

583

1016

datetime.datetime.utcnow())

584

1017

585

1018

# attributes specific for this server instance

586

1019

self.checker = None

587

1020

self.checker_initiator_tag = None

593

1026

self.changedstate = multiprocessing_manager.Condition(

594

1027

multiprocessing_manager.Lock())

595

1028

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

1029

for attr in self.__dict__.keys()

597

1030

if not attr.startswith("_")]

598

1031

self.client_structure.append("client_structure")

599

1032

600

1033

for name, t in inspect.getmembers(

601

1034

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

602

1035

if not name.startswith("_"):

603

1036

self.client_structure.append(name)

604

1037

605

1038

# Send notice to process children that client state has changed

606

1039

def send_changedstate(self):

607

1040

with self.changedstate:

608

1041

self.changedstate.notify_all()

609

1042

610

1043

def enable(self):

611

1044

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

612

1045

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

617

1050

self.last_enabled = datetime.datetime.utcnow()

618

1051

self.init_checker()

619

1052

self.send_changedstate()

620

1053

621

1054

def disable(self, quiet=True):

622

1055

"""Disable this client."""

623

1056

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

624

1057

return False

625

1058

if not quiet:

626

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

1059

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

627

1060

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

628

gobject.source_remove(self.disable_initiator_tag)

1061

GLib.source_remove(self.disable_initiator_tag)

629

1062

self.disable_initiator_tag = None

630

1063

self.expires = None

631

1064

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

632

gobject.source_remove(self.checker_initiator_tag)

1065

GLib.source_remove(self.checker_initiator_tag)

633

1066

self.checker_initiator_tag = None

634

1067

self.stop_checker()

635

1068

self.enabled = False

636

1069

if not quiet:

637

1070

self.send_changedstate()

638

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

1071

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

639

1072

return False

640

1073

641

1074

def __del__(self):

642

1075

self.disable()

643

1076

644

1077

def init_checker(self):

645

1078

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

646

1079

# and every interval from then on.

647

1080

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

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)),

651

1085

self.start_checker)

652

1086

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

653

1087

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

1088

GLib.source_remove(self.disable_initiator_tag)

1089

self.disable_initiator_tag = GLib.timeout_add(

656

1090

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

657

1091

# Also start a new checker *right now*.

658

1092

self.start_checker()

659

1093

660

1094

def checker_callback(self, source, condition, connection,

661

1095

command):

662

1096

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

663

self.checker_callback_tag = None

664

self.checker = None

665

1097

# Read return code from connection (see call_pipe)

666

1098

returncode = connection.recv()

667

1099

connection.close()

668

1100

if self.checker is not None:

1101

self.checker.join()

1102

self.checker_callback_tag = None

1103

self.checker = None

1104

669

1105

if returncode >= 0:

670

1106

self.last_checker_status = returncode

671

1107

self.last_checker_signal = None

672

1108

if self.last_checker_status == 0:

673

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

674

vars(self))

1109

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

675

1110

self.checked_ok()

676

1111

else:

677

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

1112

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

678

1113

else:

679

1114

self.last_checker_status = -1

680

1115

self.last_checker_signal = -returncode

681

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

682

vars(self))

1116

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

683

1117

return False

684

1118

685

1119

def checked_ok(self):

686

1120

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

687

1121

self.last_checked_ok = datetime.datetime.utcnow()

688

1122

self.last_checker_status = 0

689

1123

self.last_checker_signal = None

690

1124

self.bump_timeout()

691

1125

692

1126

def bump_timeout(self, timeout=None):

693

1127

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

694

1128

if timeout is None:

695

1129

timeout = self.timeout

696

1130

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

1131

GLib.source_remove(self.disable_initiator_tag)

698

1132

self.disable_initiator_tag = None

699

1133

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

700

self.disable_initiator_tag = gobject.timeout_add(

1134

self.disable_initiator_tag = GLib.timeout_add(

701

1135

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

702

1136

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

703

1137

704

1138

def need_approval(self):

705

1139

self.last_approval_request = datetime.datetime.utcnow()

706

1140

707

1141

def start_checker(self):

708

1142

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

709

1143

710

1144

If a checker already exists, leave it running and do

711

1145

nothing."""

712

1146

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

717

1151

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

718

1152

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

719

1153

# should be.

720

1154

721

1155

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

722

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

1156

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

723

1157

self.checker.join()

724

1158

self.checker = None

725

1159

# Start a new checker if needed

726

1160

if self.checker is None:

727

1161

# Escape attributes for the shell

728

1162

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

1163

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

1164

for attr in self.runtime_expansions}

731

1165

try:

732

1166

command = self.checker_command % escaped_attrs

733

1167

except TypeError as error:

734

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

735

self.checker_command,

736

exc_info=error)

1168

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

1169

self.checker_command, exc_info=error)

737

1170

return True # Try again later

738

1171

self.current_checker_command = command

739

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

740

self.name)

1172

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

741

1173

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

742

1174

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

743

1175

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

745

1177

# The exception is when not debugging but nevertheless

746

1178

# running in the foreground; use the previously

747

1179

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1180

popen_args = {"close_fds": True,

1181

"shell": True,

1182

"cwd": "/"}

751

1183

if (not self.server_settings["debug"]

752

1184

and self.server_settings["foreground"]):

753

1185

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1186

"stderr": wnull})

1187

pipe = multiprocessing.Pipe(duplex=False)

756

1188

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1189

target=call_pipe,

1190

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

1191

kwargs=popen_args)

760

1192

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1193

self.checker_callback_tag = GLib.io_add_watch(

1194

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

1195

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

763

1196

self.checker_callback, pipe[0], command)

764

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

1197

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

765

1198

return True

766

1199

767

1200

def stop_checker(self):

768

1201

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

769

1202

if self.checker_callback_tag:

770

gobject.source_remove(self.checker_callback_tag)

1203

GLib.source_remove(self.checker_callback_tag)

771

1204

self.checker_callback_tag = None

772

1205

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

773

1206

return

774

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

1207

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

775

1208

self.checker.terminate()

776

1209

self.checker = None

777

1210

782

1215

byte_arrays=False):

783

1216

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1217

become properties on the D-Bus.

785

1218

786

1219

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

787

1220

and with one argument by "Set".

788

1221

789

1222

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

790

1223

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

791

1224

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

795

1228

if byte_arrays and signature != "ay":

796

1229

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

797

1230

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

798

1231

799

1232

def decorator(func):

800

1233

func._dbus_is_property = True

801

1234

func._dbus_interface = dbus_interface

804

1237

func._dbus_name = func.__name__

805

1238

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

806

1239

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

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1240

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

808

1241

return func

809

1242

810

1243

return decorator

811

1244

812

1245

813

1246

def dbus_interface_annotations(dbus_interface):

814

1247

"""Decorator for marking functions returning interface annotations

815

1248

816

1249

Usage:

817

1250

818

1251

@dbus_interface_annotations("org.example.Interface")

819

1252

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

820

1253

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

821

1254

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

822

1255

"false"}

823

1256

"""

824

1257

825

1258

def decorator(func):

826

1259

func._dbus_is_interface = True

827

1260

func._dbus_interface = dbus_interface

828

1261

func._dbus_name = dbus_interface

829

1262

return func

830

1263

831

1264

return decorator

832

1265

833

1266

834

1267

def dbus_annotations(annotations):

835

1268

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

836

1269

Usage:

837

1270

838

1271

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

839

1272

"org.freedesktop.DBus.Property."

840

1273

"EmitsChangedSignal": "false"})

842

1275

access="r")

843

1276

def Property_dbus_property(self):

844

1277

return dbus.Boolean(False)

845

1278

846

1279

See also the DBusObjectWithAnnotations class.

847

1280

"""

848

1281

849

1282

def decorator(func):

850

1283

func._dbus_annotations = annotations

851

1284

return func

852

1285

853

1286

return decorator

854

1287

855

1288

873

1306

874

1307

class DBusObjectWithAnnotations(dbus.service.Object):

875

1308

"""A D-Bus object with annotations.

876

1309

877

1310

Classes inheriting from this can use the dbus_annotations

878

1311

decorator to add annotations to methods or signals.

879

1312

"""

880

1313

881

1314

@staticmethod

882

1315

def _is_dbus_thing(thing):

883

1316

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

884

1317

885

1318

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

886

1319

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

887

1320

"""

888

1321

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

889

1322

False)

890

1323

891

1324

def _get_all_dbus_things(self, thing):

892

1325

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

893

1326

"""

896

1329

for cls in self.__class__.__mro__

897

1330

for name, athing in

898

1331

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

899

1332

900

1333

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

1334

out_signature="s",

1335

path_keyword="object_path",

1336

connection_keyword="connection")

904

1337

def Introspect(self, object_path, connection):

905

1338

"""Overloading of standard D-Bus method.

906

1339

907

1340

Inserts annotation tags on methods and signals.

908

1341

"""

909

1342

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

910

1343

connection)

911

1344

try:

912

1345

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

913

1346

914

1347

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

915

1348

# Add annotation tags

916

1349

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

943

1376

if_tag.appendChild(ann_tag)

944

1377

# Fix argument name for the Introspect method itself

945

1378

if (if_tag.getAttribute("name")

946

== dbus.INTROSPECTABLE_IFACE):

1379

== dbus.INTROSPECTABLE_IFACE):

947

1380

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

948

1381

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

949

1382

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

955

1388

document.unlink()

956

1389

except (AttributeError, xml.dom.DOMException,

957

1390

xml.parsers.expat.ExpatError) as error:

958

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

959

exc_info=error)

1391

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

1392

exc_info=error)

960

1393

return xmlstring

961

1394

962

1395

963

1396

class DBusObjectWithProperties(DBusObjectWithAnnotations):

964

1397

"""A D-Bus object with properties.

965

1398

966

1399

Classes inheriting from this can use the dbus_service_property

967

1400

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

968

1401

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

969

1402

"""

970

1403

971

1404

def _get_dbus_property(self, interface_name, property_name):

972

1405

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

973

1406

property with the specified name and interface.

978

1411

if (value._dbus_name == property_name

979

1412

and value._dbus_interface == interface_name):

980

1413

return value.__get__(self)

981

1414

982

1415

# No such property

983

1416

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

984

1417

self.dbus_object_path, interface_name, property_name))

985

1418

986

1419

@classmethod

987

1420

def _get_all_interface_names(cls):

988

1421

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

991

1424

for x in (inspect.getmro(cls))

992

1425

for attr in dir(x))

993

1426

if name is not None)

994

1427

995

1428

@dbus.service.method(dbus.PROPERTIES_IFACE,

996

1429

in_signature="ss",

997

1430

out_signature="v")

1005

1438

if not hasattr(value, "variant_level"):

1006

1439

return value

1007

1440

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

1008

1441

1009

1442

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

1010

1443

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

1011

1444

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

1020

1453

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

1021

1454

"'ay' signature {!r}"

1022

1455

.format(prop._dbus_signature))

1023

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

1024

for byte in value))

1456

value = dbus.ByteArray(bytes(value))

1025

1457

prop(value)

1026

1458

1027

1459

@dbus.service.method(dbus.PROPERTIES_IFACE,

1028

1460

in_signature="s",

1029

1461

out_signature="a{sv}")

1030

1462

def GetAll(self, interface_name):

1031

1463

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

1032

1464

standard.

1033

1465

1034

1466

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

1035

1467

"""

1036

1468

properties = {}

1047

1479

properties[name] = value

1048

1480

continue

1049

1481

properties[name] = type(value)(

1050

value, variant_level = value.variant_level + 1)

1482

value, variant_level=value.variant_level + 1)

1051

1483

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

1052

1484

1053

1485

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

1054

1486

def PropertiesChanged(self, interface_name, changed_properties,

1055

1487

invalidated_properties):

1057

1489

standard.

1058

1490

"""

1059

1491

pass

1060

1492

1061

1493

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1062

1494

out_signature="s",

1063

path_keyword='object_path',

1064

connection_keyword='connection')

1495

path_keyword="object_path",

1496

connection_keyword="connection")

1065

1497

def Introspect(self, object_path, connection):

1066

1498

"""Overloading of standard D-Bus method.

1067

1499

1068

1500

Inserts property tags and interface annotation tags.

1069

1501

"""

1070

1502

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1072

1504

connection)

1073

1505

try:

1074

1506

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

1075

1507

1076

1508

def make_tag(document, name, prop):

1077

1509

e = document.createElement("property")

1078

1510

e.setAttribute("name", name)

1079

1511

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

1080

1512

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

1081

1513

return e

1082

1514

1083

1515

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

1084

1516

# Add property tags

1085

1517

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

1123

1555

document.unlink()

1124

1556

except (AttributeError, xml.dom.DOMException,

1125

1557

xml.parsers.expat.ExpatError) as error:

1126

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

1127

exc_info=error)

1558

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

1559

exc_info=error)

1128

1560

return xmlstring

1129

1561

1562

1130

1563

try:

1131

1564

dbus.OBJECT_MANAGER_IFACE

1132

1565

except AttributeError:

1133

1566

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

1134

1567

1568

1135

1569

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1136

1570

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

1137

1571

1138

1572

Classes inheriting from this exposes the standard

1139

1573

GetManagedObjects call and the InterfacesAdded and

1140

1574

InterfacesRemoved signals on the standard

1141

1575

"org.freedesktop.DBus.ObjectManager" interface.

1142

1576

1143

1577

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

1144

1578

manually.

1145

1579

"""

1146

1580

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1147

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

1581

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

1148

1582

def GetManagedObjects(self):

1149

1583

"""This function must be overridden"""

1150

1584

raise NotImplementedError()

1151

1585

1152

1586

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1153

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

1587

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

1154

1588

def InterfacesAdded(self, object_path, interfaces_and_properties):

1155

1589

pass

1156

1157

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

1590

1591

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

1158

1592

def InterfacesRemoved(self, object_path, interfaces):

1159

1593

pass

1160

1594

1161

1595

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1162

out_signature = "s",

1163

path_keyword = 'object_path',

1164

connection_keyword = 'connection')

1596

out_signature="s",

1597

path_keyword="object_path",

1598

connection_keyword="connection")

1165

1599

def Introspect(self, object_path, connection):

1166

1600

"""Overloading of standard D-Bus method.

1167

1601

1168

1602

Override return argument name of GetManagedObjects to be

1169

1603

"objpath_interfaces_and_properties"

1170

1604

"""

1173

1607

connection)

1174

1608

try:

1175

1609

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

1176

1610

1177

1611

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

1178

1612

# Fix argument name for the GetManagedObjects method

1179

1613

if (if_tag.getAttribute("name")

1180

== dbus.OBJECT_MANAGER_IFACE):

1614

== dbus.OBJECT_MANAGER_IFACE):

1181

1615

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

1182

1616

if (cn.getAttribute("name")

1183

1617

== "GetManagedObjects"):

1192

1626

document.unlink()

1193

1627

except (AttributeError, xml.dom.DOMException,

1194

1628

xml.parsers.expat.ExpatError) as error:

1195

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

1196

exc_info = error)

1629

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

1630

exc_info=error)

1197

1631

return xmlstring

1198

1632

1633

1199

1634

def datetime_to_dbus(dt, variant_level=0):

1200

1635

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

1201

1636

if dt is None:

1202

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

1637

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

1203

1638

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

1204

1639

1205

1640

1208

1643

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

1209

1644

interface names according to the "alt_interface_names" mapping.

1210

1645

Usage:

1211

1646

1212

1647

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

1213

1648

"net.example.AlternateInterface"})

1214

1649

class SampleDBusObject(dbus.service.Object):

1215

1650

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

1216

1651

def SampleDBusMethod():

1217

1652

pass

1218

1653

1219

1654

The above "SampleDBusMethod" on "SampleDBusObject" will be

1220

1655

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

1221

1656

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

1222

1657

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

1223

1658

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

1224

1659

1225

1660

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

1226

1661

(from DBusObjectWithProperties) and interfaces (from the

1227

1662

dbus_interface_annotations decorator).

1228

1663

"""

1229

1664

1230

1665

def wrapper(cls):

1231

1666

for orig_interface_name, alt_interface_name in (

1232

1667

alt_interface_names.items()):

1247

1682

interface_names.add(alt_interface)

1248

1683

# Is this a D-Bus signal?

1249

1684

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

1685

# Extract the original non-method undecorated

1686

# function by black magic

1250

1687

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1253

1688

nonmethod_func = (dict(

1254

1689

zip(attribute.func_code.co_freevars,

1255

1690

attribute.__closure__))

1256

1691

["func"].cell_contents)

1257

1692

else:

1258

nonmethod_func = attribute

1693

nonmethod_func = (dict(

1694

zip(attribute.__code__.co_freevars,

1695

attribute.__closure__))

1696

["func"].cell_contents)

1259

1697

# Create a new, but exactly alike, function

1260

1698

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

1261

1699

# with the alternate D-Bus interface name

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__)

1700

new_function = copy_function(nonmethod_func)

1276

1701

new_function = (dbus.service.signal(

1277

1702

alt_interface,

1278

1703

attribute._dbus_signature)(new_function))

1282

1707

attribute._dbus_annotations)

1283

1708

except AttributeError:

1284

1709

pass

1710

1285

1711

# Define a creator of a function to call both the

1286

1712

# original and alternate functions, so both the

1287

1713

# original and alternate signals gets sent when

1290

1716

"""This function is a scope container to pass

1291

1717

func1 and func2 to the "call_both" function

1292

1718

outside of its arguments"""

1293

1719

1294

1720

@functools.wraps(func2)

1295

1721

def call_both(*args, **kwargs):

1296

1722

"""This function will emit two D-Bus

1297

1723

signals by calling func1 and func2"""

1298

1724

func1(*args, **kwargs)

1299

1725

func2(*args, **kwargs)

1300

# Make wrapper function look like a D-Bus signal

1726

# Make wrapper function look like a D-Bus

1727

# signal

1301

1728

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

1302

1729

if name.startswith("_dbus_"):

1303

1730

setattr(call_both, name, attr)

1304

1731

1305

1732

return call_both

1306

1733

# Create the "call_both" function and add it to

1307

1734

# the class

1317

1744

alt_interface,

1318

1745

attribute._dbus_in_signature,

1319

1746

attribute._dbus_out_signature)

1320

(types.FunctionType(attribute.func_code,

1321

attribute.func_globals,

1322

attribute.func_name,

1323

attribute.func_defaults,

1324

attribute.func_closure)))

1747

(copy_function(attribute)))

1325

1748

# Copy annotations, if any

1326

1749

try:

1327

1750

attr[attrname]._dbus_annotations = dict(

1339

1762

attribute._dbus_access,

1340

1763

attribute._dbus_get_args_options

1341

1764

["byte_arrays"])

1342

(types.FunctionType(

1343

attribute.func_code,

1344

attribute.func_globals,

1345

attribute.func_name,

1346

attribute.func_defaults,

1347

attribute.func_closure)))

1765

(copy_function(attribute)))

1348

1766

# Copy annotations, if any

1349

1767

try:

1350

1768

attr[attrname]._dbus_annotations = dict(

1359

1777

# to the class.

1360

1778

attr[attrname] = (

1361

1779

dbus_interface_annotations(alt_interface)

1362

(types.FunctionType(attribute.func_code,

1363

attribute.func_globals,

1364

attribute.func_name,

1365

attribute.func_defaults,

1366

attribute.func_closure)))

1780

(copy_function(attribute)))

1367

1781

if deprecate:

1368

1782

# Deprecate all alternate interfaces

1369

iname="_AlternateDBusNames_interface_annotation{}"

1783

iname = "_AlternateDBusNames_interface_annotation{}"

1370

1784

for interface_name in interface_names:

1371

1785

1372

1786

@dbus_interface_annotations(interface_name)

1373

1787

def func(self):

1374

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

1375

"true" }

1788

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

1789

"true"}

1376

1790

# Find an unused name

1377

1791

for aname in (iname.format(i)

1378

1792

for i in itertools.count()):

1382

1796

if interface_names:

1383

1797

# Replace the class with a new subclass of it with

1384

1798

# methods, signals, etc. as created above.

1385

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

1386

(cls, ), attr)

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)

1387

1805

return cls

1388

1806

1389

1807

return wrapper

1390

1808

1391

1809

1393

1811

"se.bsnet.fukt.Mandos"})

1394

1812

class ClientDBus(Client, DBusObjectWithProperties):

1395

1813

"""A Client class using D-Bus

1396

1814

1397

1815

Attributes:

1398

1816

dbus_object_path: dbus.ObjectPath

1399

1817

bus: dbus.SystemBus()

1400

1818

"""

1401

1819

1402

1820

runtime_expansions = (Client.runtime_expansions

1403

1821

+ ("dbus_object_path", ))

1404

1822

1405

1823

_interface = "se.recompile.Mandos.Client"

1406

1824

1407

1825

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

1408

1409

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

1826

1827

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

1410

1828

self.bus = bus

1411

1829

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

1412

1830

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

1418

1836

"/clients/" + client_object_name)

1419

1837

DBusObjectWithProperties.__init__(self, self.bus,

1420

1838

self.dbus_object_path)

1421

1839

1422

1840

def notifychangeproperty(transform_func, dbus_name,

1423

1841

type_func=lambda x: x,

1424

1842

variant_level=1,

1426

1844

_interface=_interface):

1427

1845

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

1428

1846

its changes to DBus.

1429

1847

1430

1848

transform_fun: Function that takes a value and a variant_level

1431

1849

and transforms it to a D-Bus type.

1432

1850

dbus_name: D-Bus name of the variable

1435

1853

variant_level: D-Bus variant level. Default: 1

1436

1854

"""

1437

1855

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

1438

1856

1439

1857

def setter(self, value):

1440

1858

if hasattr(self, "dbus_object_path"):

1441

1859

if (not hasattr(self, attrname) or

1448

1866

else:

1449

1867

dbus_value = transform_func(

1450

1868

type_func(value),

1451

variant_level = variant_level)

1869

variant_level=variant_level)

1452

1870

self.PropertyChanged(dbus.String(dbus_name),

1453

1871

dbus_value)

1454

1872

self.PropertiesChanged(

1455

1873

_interface,

1456

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

1457

dbus_value }),

1874

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

1875

dbus_value}),

1458

1876

dbus.Array())

1459

1877

setattr(self, attrname, value)

1460

1878

1461

1879

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

1462

1880

1463

1881

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1464

1882

approvals_pending = notifychangeproperty(dbus.Boolean,

1465

1883

"ApprovalPending",

1466

type_func = bool)

1884

type_func=bool)

1467

1885

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

1468

1886

last_enabled = notifychangeproperty(datetime_to_dbus,

1469

1887

"LastEnabled")

1470

1888

checker = notifychangeproperty(

1471

1889

dbus.Boolean, "CheckerRunning",

1472

type_func = lambda checker: checker is not None)

1890

type_func=lambda checker: checker is not None)

1473

1891

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1474

1892

"LastCheckedOK")

1475

1893

last_checker_status = notifychangeproperty(dbus.Int16,

1480

1898

"ApprovedByDefault")

1481

1899

approval_delay = notifychangeproperty(

1482

1900

dbus.UInt64, "ApprovalDelay",

1483

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

1901

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

1484

1902

approval_duration = notifychangeproperty(

1485

1903

dbus.UInt64, "ApprovalDuration",

1486

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

1904

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

1487

1905

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

1488

1906

timeout = notifychangeproperty(

1489

1907

dbus.UInt64, "Timeout",

1490

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

1908

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

1491

1909

extended_timeout = notifychangeproperty(

1492

1910

dbus.UInt64, "ExtendedTimeout",

1493

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

1911

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

1494

1912

interval = notifychangeproperty(

1495

1913

dbus.UInt64, "Interval",

1496

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

1914

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

1497

1915

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

1498

1916

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

1499

1917

invalidate_only=True)

1500

1918

1501

1919

del notifychangeproperty

1502

1920

1503

1921

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

1504

1922

try:

1505

1923

self.remove_from_connection()

1508

1926

if hasattr(DBusObjectWithProperties, "__del__"):

1509

1927

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

1510

1928

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

1511

1929

1512

1930

def checker_callback(self, source, condition,

1513

1931

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

1514

1932

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

1530

1948

| self.last_checker_signal),

1531

1949

dbus.String(command))

1532

1950

return ret

1533

1951

1534

1952

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

1535

1953

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

1536

1954

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

1540

1958

# Emit D-Bus signal

1541

1959

self.CheckerStarted(self.current_checker_command)

1542

1960

return r

1543

1961

1544

1962

def _reset_approved(self):

1545

1963

self.approved = None

1546

1964

return False

1547

1965

1548

1966

def approve(self, value=True):

1549

1967

self.approved = value

1550

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

1551

* 1000), self._reset_approved)

1968

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

1969

* 1000), self._reset_approved)

1552

1970

self.send_changedstate()

1553

1554

## D-Bus methods, signals & properties

1555

1556

## Interfaces

1557

1558

## Signals

1559

1971

1972

# D-Bus methods, signals & properties

1973

1974

# Interfaces

1975

1976

# Signals

1977

1560

1978

# CheckerCompleted - signal

1561

1979

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

1562

1980

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

1563

1981

"D-Bus signal"

1564

1982

pass

1565

1983

1566

1984

# CheckerStarted - signal

1567

1985

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

1568

1986

def CheckerStarted(self, command):

1569

1987

"D-Bus signal"

1570

1988

pass

1571

1989

1572

1990

# PropertyChanged - signal

1573

1991

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

1574

1992

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

1575

1993

def PropertyChanged(self, property, value):

1576

1994

"D-Bus signal"

1577

1995

pass

1578

1996

1579

1997

# GotSecret - signal

1580

1998

@dbus.service.signal(_interface)

1581

1999

def GotSecret(self):

1584

2002

server to mandos-client

1585

2003

"""

1586

2004

pass

1587

2005

1588

2006

# Rejected - signal

1589

2007

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

1590

2008

def Rejected(self, reason):

1591

2009

"D-Bus signal"

1592

2010

pass

1593

2011

1594

2012

# NeedApproval - signal

1595

2013

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

1596

2014

def NeedApproval(self, timeout, default):

1597

2015

"D-Bus signal"

1598

2016

return self.need_approval()

1599

1600

## Methods

1601

2017

2018

# Methods

2019

1602

2020

# Approve - method

1603

2021

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

1604

2022

def Approve(self, value):

1605

2023

self.approve(value)

1606

2024

1607

2025

# CheckedOK - method

1608

2026

@dbus.service.method(_interface)

1609

2027

def CheckedOK(self):

1610

2028

self.checked_ok()

1611

2029

1612

2030

# Enable - method

1613

2031

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

1614

2032

@dbus.service.method(_interface)

1615

2033

def Enable(self):

1616

2034

"D-Bus method"

1617

2035

self.enable()

1618

2036

1619

2037

# StartChecker - method

1620

2038

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

1621

2039

@dbus.service.method(_interface)

1622

2040

def StartChecker(self):

1623

2041

"D-Bus method"

1624

2042

self.start_checker()

1625

2043

1626

2044

# Disable - method

1627

2045

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

1628

2046

@dbus.service.method(_interface)

1629

2047

def Disable(self):

1630

2048

"D-Bus method"

1631

2049

self.disable()

1632

2050

1633

2051

# StopChecker - method

1634

2052

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

1635

2053

@dbus.service.method(_interface)

1636

2054

def StopChecker(self):

1637

2055

self.stop_checker()

1638

1639

## Properties

1640

2056

2057

# Properties

2058

1641

2059

# ApprovalPending - property

1642

2060

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

1643

2061

def ApprovalPending_dbus_property(self):

1644

2062

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

1645

2063

1646

2064

# ApprovedByDefault - property

1647

2065

@dbus_service_property(_interface,

1648

2066

signature="b",

1651

2069

if value is None: # get

1652

2070

return dbus.Boolean(self.approved_by_default)

1653

2071

self.approved_by_default = bool(value)

1654

2072

1655

2073

# ApprovalDelay - property

1656

2074

@dbus_service_property(_interface,

1657

2075

signature="t",

1661

2079

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

1662

2080

* 1000)

1663

2081

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

1664

2082

1665

2083

# ApprovalDuration - property

1666

2084

@dbus_service_property(_interface,

1667

2085

signature="t",

1671

2089

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

1672

2090

* 1000)

1673

2091

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

1674

2092

1675

2093

# Name - property

1676

2094

@dbus_annotations(

1677

2095

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

1678

2096

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

1679

2097

def Name_dbus_property(self):

1680

2098

return dbus.String(self.name)

1681

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

1682

2107

# Fingerprint - property

1683

2108

@dbus_annotations(

1684

2109

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

1685

2110

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

1686

2111

def Fingerprint_dbus_property(self):

1687

2112

return dbus.String(self.fingerprint)

1688

2113

1689

2114

# Host - property

1690

2115

@dbus_service_property(_interface,

1691

2116

signature="s",

1694

2119

if value is None: # get

1695

2120

return dbus.String(self.host)

1696

2121

self.host = str(value)

1697

2122

1698

2123

# Created - property

1699

2124

@dbus_annotations(

1700

2125

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

1701

2126

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

1702

2127

def Created_dbus_property(self):

1703

2128

return datetime_to_dbus(self.created)

1704

2129

1705

2130

# LastEnabled - property

1706

2131

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

1707

2132

def LastEnabled_dbus_property(self):

1708

2133

return datetime_to_dbus(self.last_enabled)

1709

2134

1710

2135

# Enabled - property

1711

2136

@dbus_service_property(_interface,

1712

2137

signature="b",

1718

2143

self.enable()

1719

2144

else:

1720

2145

self.disable()

1721

2146

1722

2147

# LastCheckedOK - property

1723

2148

@dbus_service_property(_interface,

1724

2149

signature="s",

1728

2153

self.checked_ok()

1729

2154

return

1730

2155

return datetime_to_dbus(self.last_checked_ok)

1731

2156

1732

2157

# LastCheckerStatus - property

1733

2158

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

1734

2159

def LastCheckerStatus_dbus_property(self):

1735

2160

return dbus.Int16(self.last_checker_status)

1736

2161

1737

2162

# Expires - property

1738

2163

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

1739

2164

def Expires_dbus_property(self):

1740

2165

return datetime_to_dbus(self.expires)

1741

2166

1742

2167

# LastApprovalRequest - property

1743

2168

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

1744

2169

def LastApprovalRequest_dbus_property(self):

1745

2170

return datetime_to_dbus(self.last_approval_request)

1746

2171

1747

2172

# Timeout - property

1748

2173

@dbus_service_property(_interface,

1749

2174

signature="t",

1764

2189

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

1765

2190

is None):

1766

2191

return

1767

gobject.source_remove(self.disable_initiator_tag)

1768

self.disable_initiator_tag = gobject.timeout_add(

2192

GLib.source_remove(self.disable_initiator_tag)

2193

self.disable_initiator_tag = GLib.timeout_add(

1769

2194

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

1770

2195

self.disable)

1771

2196

1772

2197

# ExtendedTimeout - property

1773

2198

@dbus_service_property(_interface,

1774

2199

signature="t",

1778

2203

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

1779

2204

* 1000)

1780

2205

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

1781

2206

1782

2207

# Interval - property

1783

2208

@dbus_service_property(_interface,

1784

2209

signature="t",

1791

2216

return

1792

2217

if self.enabled:

1793

2218

# Reschedule checker run

1794

gobject.source_remove(self.checker_initiator_tag)

1795

self.checker_initiator_tag = gobject.timeout_add(

2219

GLib.source_remove(self.checker_initiator_tag)

2220

self.checker_initiator_tag = GLib.timeout_add(

1796

2221

value, self.start_checker)

1797

self.start_checker() # Start one now, too

1798

2222

self.start_checker() # Start one now, too

2223

1799

2224

# Checker - property

1800

2225

@dbus_service_property(_interface,

1801

2226

signature="s",

1804

2229

if value is None: # get

1805

2230

return dbus.String(self.checker_command)

1806

2231

self.checker_command = str(value)

1807

2232

1808

2233

# CheckerRunning - property

1809

2234

@dbus_service_property(_interface,

1810

2235

signature="b",

1816

2241

self.start_checker()

1817

2242

else:

1818

2243

self.stop_checker()

1819

2244

1820

2245

# ObjectPath - property

1821

2246

@dbus_annotations(

1822

2247

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

1823

2248

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

1824

2249

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

1825

2250

def ObjectPath_dbus_property(self):

1826

return self.dbus_object_path # is already a dbus.ObjectPath

1827

2251

return self.dbus_object_path # is already a dbus.ObjectPath

2252

1828

2253

# Secret = property

1829

2254

@dbus_annotations(

1830

2255

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

1835

2260

byte_arrays=True)

1836

2261

def Secret_dbus_property(self, value):

1837

2262

self.secret = bytes(value)

1838

2263

1839

2264

del _interface

1840

2265

1841

2266

1842

class ProxyClient(object):

1843

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

2267

class ProxyClient:

2268

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

1844

2269

self._pipe = child_pipe

1845

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

2270

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

1846

2271

if not self._pipe.recv():

1847

raise KeyError(fpr)

1848

2272

raise KeyError(key_id or fpr)

2273

1849

2274

def __getattribute__(self, name):

1850

if name == '_pipe':

2275

if name == "_pipe":

1851

2276

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

1852

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

2277

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

1853

2278

data = self._pipe.recv()

1854

if data[0] == 'data':

2279

if data[0] == "data":

1855

2280

return data[1]

1856

if data[0] == 'function':

1857

2281

if data[0] == "function":

2282

1858

2283

def func(*args, **kwargs):

1859

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

2284

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

1860

2285

return self._pipe.recv()[1]

1861

2286

1862

2287

return func

1863

2288

1864

2289

def __setattr__(self, name, value):

1865

if name == '_pipe':

2290

if name == "_pipe":

1866

2291

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

1867

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

2292

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

1868

2293

1869

2294

1870

2295

class ClientHandler(socketserver.BaseRequestHandler, object):

1871

2296

"""A class to handle client connections.

1872

2297

1873

2298

Instantiated once for each connection to handle it.

1874

2299

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

1875

2300

1876

2301

def handle(self):

1877

2302

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

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"))

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"))

1895

2313

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

1896

2314

priority = self.server.gnutls_priority

1897

2315

if priority is None:

1898

2316

priority = "NORMAL"

1899

gnutls.library.functions.gnutls_priority_set_direct(

1900

session._c_object, priority, None)

1901

2317

gnutls.priority_set_direct(session,

2318

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

2319

1902

2320

# Start communication using the Mandos protocol

1903

2321

# Get protocol number

1904

2322

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

1905

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

2323

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

1906

2324

try:

1907

2325

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

1908

2326

raise RuntimeError(line)

1909

2327

except (ValueError, IndexError, RuntimeError) as error:

1910

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

2328

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

1911

2329

return

1912

2330

1913

2331

# Start GnuTLS connection

1914

2332

try:

1915

2333

session.handshake()

1916

except gnutls.errors.GNUTLSError as error:

1917

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

2334

except gnutls.Error as error:

2335

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

1918

2336

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

1919

2337

# established. Just abandon the request.

1920

2338

return

1921

logger.debug("Handshake succeeded")

1922

2339

log.debug("Handshake succeeded")

2340

1923

2341

approval_required = False

1924

2342

try:

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,

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,

1936

2367

self.client_address)

1937

2368

except KeyError:

1938

2369

return

1939

2370

1940

2371

if client.approval_delay:

1941

2372

delay = client.approval_delay

1942

2373

client.approvals_pending += 1

1943

2374

approval_required = True

1944

2375

1945

2376

while True:

1946

2377

if not client.enabled:

1947

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

1948

client.name)

2378

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

1949

2379

if self.server.use_dbus:

1950

2380

# Emit D-Bus signal

1951

2381

client.Rejected("Disabled")

1952

2382

return

1953

2383

1954

2384

if client.approved or not client.approval_delay:

1955

#We are approved or approval is disabled

2385

# We are approved or approval is disabled

1956

2386

break

1957

2387

elif client.approved is None:

1958

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

1959

client.name)

2388

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

2389

client.name)

1960

2390

if self.server.use_dbus:

1961

2391

# Emit D-Bus signal

1962

2392

client.NeedApproval(

1963

2393

client.approval_delay.total_seconds()

1964

2394

* 1000, client.approved_by_default)

1965

2395

else:

1966

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

1967

client.name)

2396

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

2397

client.name)

1968

2398

if self.server.use_dbus:

1969

2399

# Emit D-Bus signal

1970

2400

client.Rejected("Denied")

1971

2401

return

1972

1973

#wait until timeout or approved

2402

2403

# wait until timeout or approved

1974

2404

time = datetime.datetime.now()

1975

2405

client.changedstate.acquire()

1976

2406

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

1978

2408

time2 = datetime.datetime.now()

1979

2409

if (time2 - time) >= delay:

1980

2410

if not client.approved_by_default:

1981

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

1982

" waiting for approval",

1983

client.name)

2411

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

2412

" waiting for approval",

2413

client.name)

1984

2414

if self.server.use_dbus:

1985

2415

# Emit D-Bus signal

1986

2416

client.Rejected("Approval timed out")

1989

2419

break

1990

2420

else:

1991

2421

delay -= time2 - time

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)

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)

2007

2430

# bump the timeout using extended_timeout

2008

2431

client.bump_timeout(client.extended_timeout)

2009

2432

if self.server.use_dbus:

2010

2433

# Emit D-Bus signal

2011

2434

client.GotSecret()

2012

2435

2013

2436

finally:

2014

2437

if approval_required:

2015

2438

client.approvals_pending -= 1

2016

2439

try:

2017

2440

session.bye()

2018

except gnutls.errors.GNUTLSError as error:

2019

logger.warning("GnuTLS bye failed",

2020

exc_info=error)

2021

2441

except gnutls.Error as error:

2442

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

2443

2022

2444

@staticmethod

2023

2445

def peer_certificate(session):

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

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""

2031

2462

list_size = ctypes.c_uint(1)

2032

cert_list = (gnutls.library.functions

2033

.gnutls_certificate_get_peers

2034

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

2463

cert_list = (gnutls.certificate_get_peers

2464

(session, ctypes.byref(list_size)))

2035

2465

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

2036

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

2037

" certificate")

2466

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

2038

2467

if list_size.value == 0:

2039

2468

return None

2040

2469

cert = cert_list[0]

2041

2470

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

2042

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

2043

2507

@staticmethod

2044

2508

def fingerprint(openpgp):

2045

2509

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2046

2510

# New GnuTLS "datum" with the OpenPGP public key

2047

datum = gnutls.library.types.gnutls_datum_t(

2511

datum = gnutls.datum_t(

2048

2512

ctypes.cast(ctypes.c_char_p(openpgp),

2049

2513

ctypes.POINTER(ctypes.c_ubyte)),

2050

2514

ctypes.c_uint(len(openpgp)))

2051

2515

# New empty GnuTLS certificate

2052

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2053

gnutls.library.functions.gnutls_openpgp_crt_init(

2054

ctypes.byref(crt))

2516

crt = gnutls.openpgp_crt_t()

2517

gnutls.openpgp_crt_init(ctypes.byref(crt))

2055

2518

# Import the OpenPGP public key into the certificate

2056

gnutls.library.functions.gnutls_openpgp_crt_import(

2057

crt, ctypes.byref(datum),

2058

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2519

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

2520

gnutls.OPENPGP_FMT_RAW)

2059

2521

# Verify the self signature in the key

2060

2522

crtverify = ctypes.c_uint()

2061

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2062

crt, 0, ctypes.byref(crtverify))

2523

gnutls.openpgp_crt_verify_self(crt, 0,

2524

ctypes.byref(crtverify))

2063

2525

if crtverify.value != 0:

2064

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2065

raise gnutls.errors.CertificateSecurityError(

2066

"Verify failed")

2526

gnutls.openpgp_crt_deinit(crt)

2527

raise gnutls.CertificateSecurityError(code

2528

=crtverify.value)

2067

2529

# New buffer for the fingerprint

2068

2530

buf = ctypes.create_string_buffer(20)

2069

2531

buf_len = ctypes.c_size_t()

2070

2532

# Get the fingerprint from the certificate into the buffer

2071

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2072

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

2533

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

2534

ctypes.byref(buf_len))

2073

2535

# Deinit the certificate

2074

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2536

gnutls.openpgp_crt_deinit(crt)

2075

2537

# Convert the buffer to a Python bytestring

2076

2538

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

2077

2539

# Convert the bytestring to hexadecimal notation

2079

2541

return hex_fpr

2080

2542

2081

2543

2082

class MultiprocessingMixIn(object):

2544

class MultiprocessingMixIn:

2083

2545

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

2084

2546

2085

2547

def sub_process_main(self, request, address):

2086

2548

try:

2087

2549

self.finish_request(request, address)

2088

2550

except Exception:

2089

2551

self.handle_error(request, address)

2090

2552

self.close_request(request)

2091

2553

2092

2554

def process_request(self, request, address):

2093

2555

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

2094

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

2095

args = (request, address))

2556

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

2557

args=(request, address))

2096

2558

proc.start()

2097

2559

return proc

2098

2560

2099

2561

2100

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2562

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2101

2563

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

2102

2564

2103

2565

def process_request(self, request, client_address):

2104

2566

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

2105

2567

2106

2568

This function creates a new pipe in self.pipe

2107

2569

"""

2108

2570

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2109

2571

2110

2572

proc = MultiprocessingMixIn.process_request(self, request,

2111

2573

client_address)

2112

2574

self.child_pipe.close()

2113

2575

self.add_pipe(parent_pipe, proc)

2114

2576

2115

2577

def add_pipe(self, parent_pipe, proc):

2116

2578

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

2117

2579

raise NotImplementedError()

2118

2580

2119

2581

2120

2582

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2121

socketserver.TCPServer, object):

2122

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

2123

2583

socketserver.TCPServer):

2584

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

2585

2124

2586

Attributes:

2125

2587

enabled: Boolean; whether this server is activated yet

2126

2588

interface: None or a network interface name (string)

2127

2589

use_ipv6: Boolean; to use IPv6 or not

2128

2590

"""

2129

2591

2130

2592

def __init__(self, server_address, RequestHandlerClass,

2131

2593

interface=None,

2132

2594

use_ipv6=True,

2142

2604

self.socketfd = socketfd

2143

2605

# Save the original socket.socket() function

2144

2606

self.socket_socket = socket.socket

2607

2145

2608

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

2146

#

2609

#

2147

2610

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

2148

2611

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

2149

2612

# patching socket.socket.)

2150

#

2613

#

2151

2614

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

2152

2615

@functools.wraps(socket.socket)

2153

2616

def socket_wrapper(*args, **kwargs):

2165

2628

# socket_wrapper(), if socketfd was set.

2166

2629

socketserver.TCPServer.__init__(self, server_address,

2167

2630

RequestHandlerClass)

2168

2631

2169

2632

def server_bind(self):

2170

2633

"""This overrides the normal server_bind() function

2171

2634

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

2172

2635

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

2636

global SO_BINDTODEVICE

2173

2637

if self.interface is not None:

2174

2638

if SO_BINDTODEVICE is None:

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

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

2196

2659

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

2197

2660

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

2661

if self.server_address[1]:

2662

self.allow_reuse_address = True

2198

2663

if not self.server_address[0]:

2199

2664

if self.address_family == socket.AF_INET6:

2200

any_address = "::" # in6addr_any

2665

any_address = "::" # in6addr_any

2201

2666

else:

2202

any_address = "0.0.0.0" # INADDR_ANY

2667

any_address = "0.0.0.0" # INADDR_ANY

2203

2668

self.server_address = (any_address,

2204

2669

self.server_address[1])

2205

2670

elif not self.server_address[1]:

2215

2680

2216

2681

class MandosServer(IPv6_TCPServer):

2217

2682

"""Mandos server.

2218

2683

2219

2684

Attributes:

2220

2685

clients: set of Client objects

2221

2686

gnutls_priority GnuTLS priority string

2222

2687

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

2223

2224

Assumes a gobject.MainLoop event loop.

2688

2689

Assumes a GLib.MainLoop event loop.

2225

2690

"""

2226

2691

2227

2692

def __init__(self, server_address, RequestHandlerClass,

2228

2693

interface=None,

2229

2694

use_ipv6=True,

2239

2704

self.gnutls_priority = gnutls_priority

2240

2705

IPv6_TCPServer.__init__(self, server_address,

2241

2706

RequestHandlerClass,

2242

interface = interface,

2243

use_ipv6 = use_ipv6,

2244

socketfd = socketfd)

2245

2707

interface=interface,

2708

use_ipv6=use_ipv6,

2709

socketfd=socketfd)

2710

2246

2711

def server_activate(self):

2247

2712

if self.enabled:

2248

2713

return socketserver.TCPServer.server_activate(self)

2249

2714

2250

2715

def enable(self):

2251

2716

self.enabled = True

2252

2717

2253

2718

def add_pipe(self, parent_pipe, proc):

2254

2719

# Call "handle_ipc" for both data and EOF events

2255

gobject.io_add_watch(

2256

parent_pipe.fileno(),

2257

gobject.IO_IN | gobject.IO_HUP,

2720

GLib.io_add_watch(

2721

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

2722

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

2258

2723

functools.partial(self.handle_ipc,

2259

parent_pipe = parent_pipe,

2260

proc = proc))

2261

2724

parent_pipe=parent_pipe,

2725

proc=proc))

2726

2262

2727

def handle_ipc(self, source, condition,

2263

2728

parent_pipe=None,

2264

proc = None,

2729

proc=None,

2265

2730

client_object=None):

2266

2731

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

2267

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

2732

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

2268

2733

# Wait for other process to exit

2269

2734

proc.join()

2270

2735

return False

2271

2736

2272

2737

# Read a request from the child

2273

2738

request = parent_pipe.recv()

2274

2739

command = request[0]

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:

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:

2282

2754

client = c

2283

2755

break

2284

2756

else:

2285

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

2286

"dress: %s", fpr, address)

2757

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

2758

" %s", key_id or fpr, address)

2287

2759

if self.use_dbus:

2288

2760

# Emit D-Bus signal

2289

mandos_dbus_service.ClientNotFound(fpr,

2761

mandos_dbus_service.ClientNotFound(key_id or fpr,

2290

2762

address[0])

2291

2763

parent_pipe.send(False)

2292

2764

return False

2293

2294

gobject.io_add_watch(

2295

parent_pipe.fileno(),

2296

gobject.IO_IN | gobject.IO_HUP,

2765

2766

GLib.io_add_watch(

2767

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

2768

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

2297

2769

functools.partial(self.handle_ipc,

2298

parent_pipe = parent_pipe,

2299

proc = proc,

2300

client_object = client))

2770

parent_pipe=parent_pipe,

2771

proc=proc,

2772

client_object=client))

2301

2773

parent_pipe.send(True)

2302

2774

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

2303

2775

# same fileno

2304

2776

return False

2305

if command == 'funcall':

2777

if command == "funcall":

2306

2778

funcname = request[1]

2307

2779

args = request[2]

2308

2780

kwargs = request[3]

2309

2310

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

2781

2782

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

2311

2783

funcname)(*args,

2312

2784

**kwargs)))

2313

2314

if command == 'getattr':

2785

2786

if command == "getattr":

2315

2787

attrname = request[1]

2316

2788

if isinstance(client_object.__getattribute__(attrname),

2317

collections.Callable):

2318

parent_pipe.send(('function', ))

2789

collections.abc.Callable):

2790

parent_pipe.send(("function", ))

2319

2791

else:

2320

2792

parent_pipe.send((

2321

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

2322

2323

if command == 'setattr':

2793

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

2794

2795

if command == "setattr":

2324

2796

attrname = request[1]

2325

2797

value = request[2]

2326

2798

setattr(client_object, attrname, value)

2327

2799

2328

2800

return True

2329

2801

2330

2802

2331

2803

def rfc3339_duration_to_delta(duration):

2332

2804

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

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

2348

2822

"""

2349

2823

2350

2824

# Parsing an RFC 3339 duration with regular expressions is not

2351

2825

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

2352

2826

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

2353

2827

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

2354

2828

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

2355

2829

# avoid excessive use of external libraries.

2356

2830

2357

2831

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

2358

2832

Token = collections.namedtuple("Token", (

2359

2833

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

2392

2866

frozenset((token_year, token_month,

2393

2867

token_day, token_time,

2394

2868

token_week)))

2395

# Define starting values

2396

value = datetime.timedelta() # Value so far

2869

# Define starting values:

2870

# Value so far

2871

value = datetime.timedelta()

2397

2872

found_token = None

2398

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

2399

s = duration # String left to parse

2873

# Following valid tokens

2874

followers = frozenset((token_duration, ))

2875

# String left to parse

2876

s = duration

2400

2877

# Loop until end token is found

2401

2878

while found_token is not token_end:

2402

2879

# Search for any currently valid tokens

2426

2903

2427

2904

def string_to_delta(interval):

2428

2905

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

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)

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

2442

2919

"""

2443

2920

2444

2921

try:

2445

2922

return rfc3339_duration_to_delta(interval)

2446

2923

except ValueError:

2447

2924

pass

2448

2925

2449

2926

timevalue = datetime.timedelta(0)

2450

2927

for s in interval.split():

2451

2928

try:

2469

2946

return timevalue

2470

2947

2471

2948

2472

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

2949

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

2473

2950

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

2474

2951

2475

2952

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

2476

2953

if os.fork():

2477

2954

sys.exit()

2495

2972

2496

2973

2497

2974

def main():

2498

2975

2499

2976

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

2500

2977

# Parsing of options, both command line and config file

2501

2978

2502

2979

parser = argparse.ArgumentParser()

2503

2980

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

2504

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

2981

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

2505

2982

help="show version number and exit")

2506

2983

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

2507

2984

help="Bind to interface IF")

2543

3020

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

2544

3021

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

2545

3022

default=None)

2546

3023

2547

3024

options = parser.parse_args()

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

3025

2554

3026

# Default values for config file for server-global settings

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

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

2573

3050

# Parse config file for server-global settings

2574

server_config = configparser.SafeConfigParser(server_defaults)

3051

server_config = configparser.ConfigParser(server_defaults)

2575

3052

del server_defaults

2576

3053

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

2577

# Convert the SafeConfigParser object to a dict

3054

# Convert the ConfigParser object to a dict

2578

3055

server_settings = server_config.defaults()

2579

3056

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

2580

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

3057

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

3058

"foreground", "zeroconf"):

2581

3059

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

2582

3060

option)

2583

3061

if server_settings["port"]:

2593

3071

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

2594

3072

["socket"])

2595

3073

del server_config

2596

3074

2597

3075

# Override the settings from the config file with command line

2598

3076

# options, if set.

2599

3077

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

2617

3095

if server_settings["debug"]:

2618

3096

server_settings["foreground"] = True

2619

3097

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

2620

3098

2621

3099

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

2622

3100

2623

3101

if (not server_settings["zeroconf"]

2624

3102

and not (server_settings["port"]

2625

3103

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

2626

3104

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

2627

3105

2628

3106

# For convenience

2629

3107

debug = server_settings["debug"]

2630

3108

debuglevel = server_settings["debuglevel"]

2634

3112

stored_state_file)

2635

3113

foreground = server_settings["foreground"]

2636

3114

zeroconf = server_settings["zeroconf"]

2637

3115

2638

3116

if debug:

2639

3117

initlogger(debug, logging.DEBUG)

2640

3118

else:

2643

3121

else:

2644

3122

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

2645

3123

initlogger(debug, level)

2646

3124

2647

3125

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

2648

3126

syslogger.setFormatter(

2649

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

2650

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

3127

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

3128

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

2651

3129

server_settings["servicename"])))

2652

3130

2653

3131

# Parse config file with clients

2654

client_config = configparser.SafeConfigParser(Client

2655

.client_defaults)

3132

client_config = configparser.ConfigParser(Client.client_defaults)

2656

3133

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

2657

3134

"clients.conf"))

2658

3135

2659

3136

global mandos_dbus_service

2660

3137

mandos_dbus_service = None

2661

3138

2662

3139

socketfd = None

2663

3140

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

2664

3141

socketfd = server_settings["socket"]

2678

3155

try:

2679

3156

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

2680

3157

except IOError as e:

2681

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

2682

exc_info=e)

2683

2684

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

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")):

2685

3164

try:

2686

3165

uid = pwd.getpwnam(name).pw_uid

2687

gid = pwd.getpwnam(name).pw_gid

3166

gid = pwd.getpwnam(group).pw_gid

2688

3167

break

2689

3168

except KeyError:

2690

3169

continue

2694

3173

try:

2695

3174

os.setgid(gid)

2696

3175

os.setuid(uid)

3176

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

2697

3177

except OSError as error:

3178

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

3179

os.strerror(error.errno))

2698

3180

if error.errno != errno.EPERM:

2699

3181

raise

2700

3182

2701

3183

if debug:

2702

3184

# Enable all possible GnuTLS debugging

2703

3185

2704

3186

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

2705

3187

# - GnuTLS manual

2706

gnutls.library.functions.gnutls_global_set_log_level(11)

2707

2708

@gnutls.library.types.gnutls_log_func

3188

gnutls.global_set_log_level(11)

3189

3190

@gnutls.log_func

2709

3191

def debug_gnutls(level, string):

2710

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

2711

2712

gnutls.library.functions.gnutls_global_set_log_function(

2713

debug_gnutls)

2714

3192

log.debug("GnuTLS: %s",

3193

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

3194

3195

gnutls.global_set_log_function(debug_gnutls)

3196

2715

3197

# Redirect stdin so all checkers get /dev/null

2716

3198

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

2717

3199

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

2718

3200

if null > 2:

2719

3201

os.close(null)

2720

3202

2721

3203

# Need to fork before connecting to D-Bus

2722

3204

if not foreground:

2723

3205

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

2724

3206

daemon()

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

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

2730

3213

global main_loop

2731

3214

# From the Avahi example code

2732

3215

DBusGMainLoop(set_as_default=True)

2733

main_loop = gobject.MainLoop()

3216

main_loop = GLib.MainLoop()

2734

3217

bus = dbus.SystemBus()

2735

3218

# End of Avahi example code

2736

3219

if use_dbus:

2742

3225

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

2743

3226

do_not_queue=True)

2744

3227

except dbus.exceptions.DBusException as e:

2745

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

3228

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

2746

3229

use_dbus = False

2747

3230

server_settings["use_dbus"] = False

2748

3231

tcp_server.use_dbus = False

2749

3232

if zeroconf:

2750

3233

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2751

3234

service = AvahiServiceToSyslog(

2752

name = server_settings["servicename"],

2753

servicetype = "_mandos._tcp",

2754

protocol = protocol,

2755

bus = bus)

3235

name=server_settings["servicename"],

3236

servicetype="_mandos._tcp",

3237

protocol=protocol,

3238

bus=bus)

2756

3239

if server_settings["interface"]:

2757

3240

service.interface = if_nametoindex(

2758

3241

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

2759

3242

2760

3243

global multiprocessing_manager

2761

3244

multiprocessing_manager = multiprocessing.Manager()

2762

3245

2763

3246

client_class = Client

2764

3247

if use_dbus:

2765

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

2766

3248

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

3249

2767

3250

client_settings = Client.config_parser(client_config)

2768

3251

old_client_settings = {}

2769

3252

clients_data = {}

2770

3253

2771

3254

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

2772

3255

global wnull

2773

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

3256

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

2774

3257

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

2775

3258

# mode

2776

3259

if debug or not foreground:

2777

3260

wnull.close()

2778

3261

2779

3262

# Get client data and settings from last running state.

2780

3263

if server_settings["restore"]:

2781

3264

try:

2782

3265

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

2783

clients_data, old_client_settings = pickle.load(

2784

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"))

2785

3316

os.remove(stored_state_path)

2786

3317

except IOError as e:

2787

3318

if e.errno == errno.ENOENT:

2788

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

2789

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

3319

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

3320

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

2790

3321

else:

2791

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

2792

exc_info=e)

3322

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

3323

exc_info=e)

2793

3324

raise

2794

3325

except EOFError as e:

2795

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

2796

"EOFError:",

2797

exc_info=e)

2798

3326

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

3327

exc_info=e)

3328

2799

3329

with PGPEngine() as pgp:

2800

3330

for client_name, client in clients_data.items():

2801

3331

# Skip removed clients

2802

3332

if client_name not in client_settings:

2803

3333

continue

2804

3334

2805

3335

# Decide which value to use after restoring saved state.

2806

3336

# We have three different values: Old config file,

2807

3337

# new config file, and saved state.

2818

3348

client[name] = value

2819

3349

except KeyError:

2820

3350

pass

2821

3351

2822

3352

# Clients who has passed its expire date can still be

2823

3353

# enabled if its last checker was successful. A Client

2824

3354

# whose checker succeeded before we stored its state is

2827

3357

if client["enabled"]:

2828

3358

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

2829

3359

if not client["last_checked_ok"]:

2830

logger.warning(

2831

"disabling client {} - Client never "

2832

"performed a successful checker".format(

2833

client_name))

3360

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

3361

" never performed a successful"

3362

" checker", client_name)

2834

3363

client["enabled"] = False

2835

3364

elif client["last_checker_status"] != 0:

2836

logger.warning(

2837

"disabling client {} - Client last"

2838

" checker failed with error code"

2839

" {}".format(

2840

client_name,

2841

client["last_checker_status"]))

3365

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

3366

" last checker failed with error"

3367

" code %s", client_name,

3368

client["last_checker_status"])

2842

3369

client["enabled"] = False

2843

3370

else:

2844

3371

client["expires"] = (

2845

3372

datetime.datetime.utcnow()

2846

3373

+ client["timeout"])

2847

logger.debug("Last checker succeeded,"

2848

" keeping {} enabled".format(

2849

client_name))

3374

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

3375

" enabled", client_name)

2850

3376

try:

2851

3377

client["secret"] = pgp.decrypt(

2852

3378

client["encrypted_secret"],

2853

3379

client_settings[client_name]["secret"])

2854

3380

except PGPError:

2855

3381

# If decryption fails, we use secret from new settings

2856

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

2857

client_name))

3382

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

3383

client_name)

2858

3384

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

2859

3385

["secret"])

2860

3386

2861

3387

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

2862

3388

for client_name in (set(old_client_settings)

2863

3389

- set(client_settings)):

2865

3391

for client_name in (set(client_settings)

2866

3392

- set(old_client_settings)):

2867

3393

clients_data[client_name] = client_settings[client_name]

2868

3394

2869

3395

# Create all client objects

2870

3396

for client_name, client in clients_data.items():

2871

3397

tcp_server.clients[client_name] = client_class(

2872

name = client_name,

2873

settings = client,

2874

server_settings = server_settings)

2875

3398

name=client_name,

3399

settings=client,

3400

server_settings=server_settings)

3401

2876

3402

if not tcp_server.clients:

2877

logger.warning("No clients defined")

2878

3403

log.warning("No clients defined")

3404

2879

3405

if not foreground:

2880

3406

if pidfile is not None:

2881

3407

pid = os.getpid()

2883

3409

with pidfile:

2884

3410

print(pid, file=pidfile)

2885

3411

except IOError:

2886

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

2887

pidfilename, pid)

3412

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

3413

pidfilename, pid)

2888

3414

del pidfile

2889

3415

del pidfilename

2890

2891

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

2892

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

2893

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

2894

3421

if use_dbus:

2895

3422

2896

3423

@alternate_dbus_interfaces(

2897

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

3424

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

2898

3425

class MandosDBusService(DBusObjectWithObjectManager):

2899

3426

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

2900

3427

2901

3428

def __init__(self):

2902

3429

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

2903

3430

2904

3431

_interface = "se.recompile.Mandos"

2905

3432

2906

3433

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

2907

3434

def ClientAdded(self, objpath):

2908

3435

"D-Bus signal"

2909

3436

pass

2910

3437

2911

3438

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

2912

def ClientNotFound(self, fingerprint, address):

3439

def ClientNotFound(self, key_id, address):

2913

3440

"D-Bus signal"

2914

3441

pass

2915

3442

2916

3443

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

2917

3444

"true"})

2918

3445

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

2919

3446

def ClientRemoved(self, objpath, name):

2920

3447

"D-Bus signal"

2921

3448

pass

2922

3449

2923

3450

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

2924

3451

"true"})

2925

3452

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

2926

3453

def GetAllClients(self):

2927

3454

"D-Bus method"

2928

3455

return dbus.Array(c.dbus_object_path for c in

2929

tcp_server.clients.itervalues())

2930

3456

tcp_server.clients.values())

3457

2931

3458

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

2932

3459

"true"})

2933

3460

@dbus.service.method(_interface,

2935

3462

def GetAllClientsWithProperties(self):

2936

3463

"D-Bus method"

2937

3464

return dbus.Dictionary(

2938

{ c.dbus_object_path: c.GetAll(

3465

{c.dbus_object_path: c.GetAll(

2939

3466

"se.recompile.Mandos.Client")

2940

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

3467

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

2941

3468

signature="oa{sv}")

2942

3469

2943

3470

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

2944

3471

def RemoveClient(self, object_path):

2945

3472

"D-Bus method"

2946

for c in tcp_server.clients.itervalues():

3473

for c in tcp_server.clients.values():

2947

3474

if c.dbus_object_path == object_path:

2948

3475

del tcp_server.clients[c.name]

2949

3476

c.remove_from_connection()

2953

3480

self.client_removed_signal(c)

2954

3481

return

2955

3482

raise KeyError(object_path)

2956

3483

2957

3484

del _interface

2958

3485

2959

3486

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

2960

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

3487

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

2961

3488

def GetManagedObjects(self):

2962

3489

"""D-Bus method"""

2963

3490

return dbus.Dictionary(

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

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

2971

3498

def client_added_signal(self, client):

2972

3499

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

2973

3500

if use_dbus:

2975

3502

self.InterfacesAdded(

2976

3503

client.dbus_object_path,

2977

3504

dbus.Dictionary(

2978

{ interface: client.GetAll(interface)

2979

for interface in

2980

client._get_all_interface_names()}))

3505

{interface: client.GetAll(interface)

3506

for interface in

3507

client._get_all_interface_names()}))

2981

3508

# Old signal

2982

3509

self.ClientAdded(client.dbus_object_path)

2983

3510

2984

3511

def client_removed_signal(self, client):

2985

3512

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

2986

3513

if use_dbus:

2991

3518

# Old signal

2992

3519

self.ClientRemoved(client.dbus_object_path,

2993

3520

client.name)

2994

3521

2995

3522

mandos_dbus_service = MandosDBusService()

2996

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

2997

3529

def cleanup():

2998

3530

"Cleanup function; run on exit"

2999

3531

if zeroconf:

3000

3532

service.cleanup()

3001

3002

multiprocessing.active_children()

3003

wnull.close()

3533

3534

mp.active_children()

3535

wn.close()

3004

3536

if not (tcp_server.clients or client_settings):

3005

3537

return

3006

3538

3007

3539

# Store client before exiting. Secrets are encrypted with key

3008

3540

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

3009

3541

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

3010

3542

clients = {}

3011

3543

with PGPEngine() as pgp:

3012

for client in tcp_server.clients.itervalues():

3544

for client in tcp_server.clients.values():

3013

3545

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

3014

3546

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

3015

3547

key)

3016

3548

client_dict = {}

3017

3549

3018

3550

# A list of attributes that can not be pickled

3019

3551

# + secret.

3020

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

3021

"checker", "server_settings" }

3552

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

3553

"checker", "server_settings"}

3022

3554

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

3023

3555

.Object):

3024

3556

exclude.add(name)

3025

3557

3026

3558

client_dict["encrypted_secret"] = (client

3027

3559

.encrypted_secret)

3028

3560

for attr in client.client_structure:

3029

3561

if attr not in exclude:

3030

3562

client_dict[attr] = getattr(client, attr)

3031

3563

3032

3564

clients[client.name] = client_dict

3033

3565

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

3034

3566

3035

3567

try:

3036

3568

with tempfile.NamedTemporaryFile(

3037

mode='wb',

3569

mode="wb",

3038

3570

suffix=".pickle",

3039

prefix='clients-',

3571

prefix="clients-",

3040

3572

dir=os.path.dirname(stored_state_path),

3041

3573

delete=False) as stored_state:

3042

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

3574

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

3575

protocol=2)

3043

3576

tempname = stored_state.name

3044

3577

os.rename(tempname, stored_state_path)

3045

3578

except (IOError, OSError) as e:

3049

3582

except NameError:

3050

3583

pass

3051

3584

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

3052

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

3053

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

3585

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

3586

os.strerror(e.errno))

3054

3587

else:

3055

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

3056

exc_info=e)

3588

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

3589

exc_info=e)

3057

3590

raise

3058

3591

3059

3592

# Delete all clients, and settings from config

3060

3593

while tcp_server.clients:

3061

3594

name, client = tcp_server.clients.popitem()

3064

3597

# Don't signal the disabling

3065

3598

client.disable(quiet=True)

3066

3599

# Emit D-Bus signal for removal

3067

mandos_dbus_service.client_removed_signal(client)

3600

if use_dbus:

3601

mandos_dbus_service.client_removed_signal(client)

3068

3602

client_settings.clear()

3069

3603

3070

3604

atexit.register(cleanup)

3071

3072

for client in tcp_server.clients.itervalues():

3605

3606

for client in tcp_server.clients.values():

3073

3607

if use_dbus:

3074

3608

# Emit D-Bus signal for adding

3075

3609

mandos_dbus_service.client_added_signal(client)

3076

3610

# Need to initiate checking of clients

3077

3611

if client.enabled:

3078

3612

client.init_checker()

3079

3613

3080

3614

tcp_server.enable()

3081

3615

tcp_server.server_activate()

3082

3616

3083

3617

# Find out what port we got

3084

3618

if zeroconf:

3085

3619

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

3086

3620

if use_ipv6:

3087

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

3088

" flowinfo %d, scope_id %d",

3089

*tcp_server.socket.getsockname())

3621

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

3622

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

3090

3623

else: # IPv4

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

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

3096

3629

try:

3097

3630

if zeroconf:

3098

3631

# From the Avahi example code

3099

3632

try:

3100

3633

service.activate()

3101

3634

except dbus.exceptions.DBusException as error:

3102

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

3635

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

3103

3636

cleanup()

3104

3637

sys.exit(1)

3105

3638

# End of Avahi example code

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")

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")

3113

3647

main_loop.run()

3114

3648

except AvahiError as error:

3115

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

3649

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

3116

3650

cleanup()

3117

3651

sys.exit(1)

3118

3652

except KeyboardInterrupt:

3119

3653

if debug:

3120

3654

print("", file=sys.stderr)

3121

logger.debug("Server received KeyboardInterrupt")

3122

logger.debug("Server exiting")

3655

log.debug("Server received KeyboardInterrupt")

3656

log.debug("Server exiting")

3123

3657

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

3124

3658

cleanup()

3125

3659

3126

3127

if __name__ == '__main__':

3128

main()

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: