/mandos/trunk : revision 1273

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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 SocketServer as socketserver

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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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import ConfigParser as configparser

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import sys

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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 re

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import os

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59

import signal

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60

import subprocess

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61

import atexit

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import stat

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import logging

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63

import logging.handlers

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64

import pwd

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import contextlib

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66

import struct

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67

import fcntl

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68

import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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74

import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import random

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import shlex

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import dbus

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import dbus.service

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import gobject

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import avahi

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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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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# 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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107

# 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 = "1.6.9"

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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 = "1.8.16"

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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"))

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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105

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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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166

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

179

func.__name__,

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func.__defaults__,

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func.__closure__)

182

183

115

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

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"""init logger and add loglevel"""

117

186

118

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

127

192

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

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" %(message)s"))

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log.addHandler(syslogger)

195

128

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if debug:

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197

console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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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)

136

204

137

205

138

206

class PGPError(Exception):

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208

pass

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209

142

210

143

class PGPEngine(object):

211

class PGPEngine:

144

212

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

213

145

214

def __init__(self):

146

215

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

147

self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

150

'--quiet',

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'--no-use-agent']

152

216

self.gpg = "gpg"

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try:

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

219

for line in output.splitlines():

220

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

221

if name == b"gpg":

222

self.gpg = path

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break

224

except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ["--batch",

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"--homedir", self.tempdir,

229

"--force-mdc",

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"--quiet"]

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

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

233

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

234

153

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def __enter__(self):

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236

return self

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237

156

238

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

157

239

self._cleanup()

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240

return False

159

241

160

242

def __del__(self):

161

243

self._cleanup()

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244

163

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def _cleanup(self):

164

246

if self.tempdir is not None:

165

247

# Delete contents of tempdir

166

248

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

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topdown = False):

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topdown=False):

168

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for filename in files:

169

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

170

252

for dirname in dirs:

172

254

# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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257

176

258

def password_encode(self, password):

177

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

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

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265

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

184

266

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

185

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return encoded

186

268

187

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def encrypt(self, data, password):

188

270

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

271

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

191

273

passfile.write(passphrase)

192

274

passfile.flush()

193

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

194

'--passphrase-file',

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

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"--passphrase-file",

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277

passfile.name]

196

278

+ self.gnupgargs,

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stdin = subprocess.PIPE,

198

stdout = subprocess.PIPE,

199

stderr = subprocess.PIPE)

200

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)

201

283

if proc.returncode != 0:

202

284

raise PGPError(err)

203

285

return ciphertext

204

286

205

287

def decrypt(self, data, password):

206

288

passphrase = self.password_encode(password)

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

289

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

209

291

passfile.write(passphrase)

210

292

passfile.flush()

211

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

212

'--passphrase-file',

293

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

294

"--passphrase-file",

213

295

passfile.name]

214

296

+ self.gnupgargs,

215

stdin = subprocess.PIPE,

216

stdout = subprocess.PIPE,

217

stderr = subprocess.PIPE)

218

decrypted_plaintext, err = proc.communicate(input

219

= data)

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

220

301

if proc.returncode != 0:

221

302

raise PGPError(err)

222

303

return decrypted_plaintext

223

304

224

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

225

332

class AvahiError(Exception):

226

333

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

227

334

self.value = value

228

335

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

229

336

**kwargs)

230

337

338

231

339

class AvahiServiceError(AvahiError):

232

340

pass

233

341

342

234

343

class AvahiGroupError(AvahiError):

235

344

pass

236

345

237

346

238

class AvahiService(object):

347

class AvahiService:

239

348

"""An Avahi (Zeroconf) service.

240

349

241

350

Attributes:

242

351

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

243

352

Used to optionally bind to the specified interface.

244

245

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

353

354

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

246

355

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

247

356

port: integer; what port to announce

248

357

TXT: list of strings; TXT record for the service

255

364

server: D-Bus Server

256

365

bus: dbus.SystemBus()

257

366

"""

258

259

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

260

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

261

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

262

protocol = avahi.PROTO_UNSPEC, bus = None):

367

368

def __init__(self,

369

interface=avahi.IF_UNSPEC,

370

name=None,

371

servicetype=None,

372

port=None,

373

TXT=None,

374

domain="",

375

host="",

376

max_renames=32768,

377

protocol=avahi.PROTO_UNSPEC,

378

bus=None):

263

379

self.interface = interface

264

380

self.name = name

265

381

self.type = servicetype

274

390

self.server = None

275

391

self.bus = bus

276

392

self.entry_group_state_changed_match = None

277

393

278

394

def rename(self, remove=True):

279

395

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

280

396

if self.rename_count >= self.max_renames:

281

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

282

" after %i retries, exiting.",

283

self.rename_count)

397

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

398

" after %i retries, exiting.",

399

self.rename_count)

284

400

raise AvahiServiceError("Too many renames")

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

287

403

self.rename_count += 1

288

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

289

self.name)

404

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

405

self.name)

290

406

if remove:

291

407

self.remove()

292

408

try:

294

410

except dbus.exceptions.DBusException as error:

295

411

if (error.get_dbus_name()

296

412

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

297

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

413

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

298

414

return self.rename(remove=False)

299

415

else:

300

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

416

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

301

417

self.cleanup()

302

418

os._exit(1)

303

419

304

420

def remove(self):

305

421

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

306

422

if self.entry_group_state_changed_match is not None:

308

424

self.entry_group_state_changed_match = None

309

425

if self.group is not None:

310

426

self.group.Reset()

311

427

312

428

def add(self):

313

429

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

314

430

self.remove()

319

435

avahi.DBUS_INTERFACE_ENTRY_GROUP)

320

436

self.entry_group_state_changed_match = (

321

437

self.group.connect_to_signal(

322

'StateChanged', self.entry_group_state_changed))

323

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

324

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)

325

441

self.group.AddService(

326

442

self.interface,

327

443

self.protocol,

331

447

dbus.UInt16(self.port),

332

448

avahi.string_array_to_txt_array(self.TXT))

333

449

self.group.Commit()

334

450

335

451

def entry_group_state_changed(self, state, error):

336

452

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

337

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

338

453

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

454

339

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

340

logger.debug("Zeroconf service established.")

456

log.debug("Zeroconf service established.")

341

457

elif state == avahi.ENTRY_GROUP_COLLISION:

342

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

458

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

343

459

self.rename()

344

460

elif state == avahi.ENTRY_GROUP_FAILURE:

345

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

346

str(error))

347

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

348

.format(error))

349

461

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

462

str(error))

463

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

464

350

465

def cleanup(self):

351

466

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

352

467

if self.group is not None:

357

472

pass

358

473

self.group = None

359

474

self.remove()

360

475

361

476

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

362

477

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

363

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

364

bad_states = { avahi.SERVER_INVALID:

365

"Zeroconf server invalid",

366

avahi.SERVER_REGISTERING: None,

367

avahi.SERVER_COLLISION:

368

"Zeroconf server name collision",

369

avahi.SERVER_FAILURE:

370

"Zeroconf server failure" }

478

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

479

bad_states = {

480

avahi.SERVER_INVALID: "Zeroconf server invalid",

481

avahi.SERVER_REGISTERING: None,

482

avahi.SERVER_COLLISION: "Zeroconf server name collision",

483

avahi.SERVER_FAILURE: "Zeroconf server failure",

484

}

371

485

if state in bad_states:

372

486

if bad_states[state] is not None:

373

487

if error is None:

374

logger.error(bad_states[state])

488

log.error(bad_states[state])

375

489

else:

376

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

490

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

377

491

self.cleanup()

378

492

elif state == avahi.SERVER_RUNNING:

379

self.add()

493

try:

494

self.add()

495

except dbus.exceptions.DBusException as error:

496

if (error.get_dbus_name()

497

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

498

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

499

return self.rename(remove=False)

500

else:

501

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

502

self.cleanup()

503

os._exit(1)

380

504

else:

381

505

if error is None:

382

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

506

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

383

507

else:

384

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

385

508

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

509

386

510

def activate(self):

387

511

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

388

512

if self.server is None:

392

516

follow_name_owner_changes=True),

393

517

avahi.DBUS_INTERFACE_SERVER)

394

518

self.server.connect_to_signal("StateChanged",

395

self.server_state_changed)

519

self.server_state_changed)

396

520

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

397

521

398

522

399

523

class AvahiServiceToSyslog(AvahiService):

400

524

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

401

525

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

402

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

403

syslogger.setFormatter(logging.Formatter

404

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

405

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

406

.format(self.name)))

526

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

527

**kwargs)

528

syslogger.setFormatter(logging.Formatter(

529

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

530

.format(self.name)))

407

531

return ret

408

532

409

533

410

class Client(object):

534

# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

537

538

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

539

if library is None:

540

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

541

_library = ctypes.cdll.LoadLibrary(library)

542

del library

543

544

# Unless otherwise indicated, the constants and types below are

545

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

546

547

# Constants

548

E_SUCCESS = 0

549

E_INTERRUPTED = -52

550

E_AGAIN = -28

551

CRT_OPENPGP = 2

552

CRT_RAWPK = 3

553

CLIENT = 2

554

SHUT_RDWR = 0

555

CRD_CERTIFICATE = 1

556

E_NO_CERTIFICATE_FOUND = -49

557

X509_FMT_DER = 0

558

NO_TICKETS = 1<<10

559

ENABLE_RAWPK = 1<<18

560

CTYPE_PEERS = 3

561

KEYID_USE_SHA256 = 1 # gnutls/x509.h

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

564

# Types

565

class _session_int(ctypes.Structure):

566

_fields_ = []

567

session_t = ctypes.POINTER(_session_int)

568

569

class certificate_credentials_st(ctypes.Structure):

570

_fields_ = []

571

certificate_credentials_t = ctypes.POINTER(

572

certificate_credentials_st)

573

certificate_type_t = ctypes.c_int

574

575

class datum_t(ctypes.Structure):

576

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

577

("size", ctypes.c_uint)]

578

579

class _openpgp_crt_int(ctypes.Structure):

580

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

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

584

credentials_type_t = ctypes.c_int

585

transport_ptr_t = ctypes.c_void_p

586

close_request_t = ctypes.c_int

587

588

# Exceptions

589

class Error(Exception):

590

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

591

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

592

# code is passed, convert it to a string with

593

# gnutls.strerror()

594

self.code = code

595

if message is None and code is not None:

596

message = gnutls.strerror(code).decode(

597

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

598

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

599

message, *args)

600

601

class CertificateSecurityError(Error):

602

pass

603

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

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

611

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

612

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

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

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

621

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

622

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

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

629

# Classes

630

class Credentials(With_from_param):

631

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

634

self.type = gnutls.CRD_CERTIFICATE

635

636

def __del__(self):

637

gnutls.certificate_free_credentials(self)

638

639

class ClientSession(With_from_param):

640

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

641

self._as_parameter_ = gnutls.session_t()

642

gnutls_flags = gnutls.CLIENT

643

if gnutls.check_version(b"3.5.6"):

644

gnutls_flags |= gnutls.NO_TICKETS

645

if gnutls.has_rawpk:

646

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

648

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

652

self.socket = socket

653

if credentials is None:

654

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

657

self.credentials = credentials

658

659

def __del__(self):

660

gnutls.deinit(self)

661

662

def handshake(self):

663

return gnutls.handshake(self)

664

665

def send(self, data):

666

data = bytes(data)

667

data_len = len(data)

668

while data_len > 0:

669

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

670

data_len)

671

672

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

674

675

# Error handling functions

676

def _error_code(result):

677

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

678

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

679

if result >= gnutls.E_SUCCESS:

680

return result

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

raise gnutls.CertificateSecurityError(code=result)

683

raise gnutls.Error(code=result)

684

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

687

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

688

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

689

while result < gnutls.E_SUCCESS:

690

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

691

return _error_code(result)

692

result = func(*arguments)

693

return result

694

695

# Unless otherwise indicated, the function declarations below are

696

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

697

698

# Functions

699

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

701

ctypes.POINTER(ctypes.c_char_p)]

702

priority_set_direct.restype = _error_code

703

704

init = _library.gnutls_init

705

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

706

init.restype = _error_code

707

708

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

710

set_default_priority.restype = _error_code

711

712

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

714

ctypes.c_size_t]

715

record_send.restype = ctypes.c_ssize_t

716

record_send.errcheck = _retry_on_error

717

718

certificate_allocate_credentials = (

719

_library.gnutls_certificate_allocate_credentials)

720

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

722

certificate_allocate_credentials.restype = _error_code

723

724

certificate_free_credentials = (

725

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

727

certificate_free_credentials.restype = None

728

729

handshake_set_private_extensions = (

730

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

732

ctypes.c_int]

733

handshake_set_private_extensions.restype = None

734

735

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

738

credentials_set.restype = _error_code

739

740

strerror = _library.gnutls_strerror

741

strerror.argtypes = [ctypes.c_int]

742

strerror.restype = ctypes.c_char_p

743

744

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

746

certificate_type_get.restype = _error_code

747

748

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

750

ctypes.POINTER(ctypes.c_uint)]

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

753

global_set_log_level = _library.gnutls_global_set_log_level

754

global_set_log_level.argtypes = [ctypes.c_int]

755

global_set_log_level.restype = None

756

757

global_set_log_function = _library.gnutls_global_set_log_function

758

global_set_log_function.argtypes = [log_func]

759

global_set_log_function.restype = None

760

761

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

763

deinit.restype = None

764

765

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

768

handshake.errcheck = _retry_on_error

769

770

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

772

transport_set_ptr.restype = None

773

774

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

777

bye.errcheck = _retry_on_error

778

779

check_version = _library.gnutls_check_version

780

check_version.argtypes = [ctypes.c_char_p]

781

check_version.restype = ctypes.c_char_p

782

783

_need_version = b"3.3.0"

784

if check_version(_need_version) is None:

785

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

786

.format(_need_version))

787

788

_tls_rawpk_version = b"3.6.6"

789

has_rawpk = bool(check_version(_tls_rawpk_version))

790

791

if has_rawpk:

792

# Types

793

class pubkey_st(ctypes.Structure):

794

_fields = []

795

pubkey_t = ctypes.POINTER(pubkey_st)

796

797

x509_crt_fmt_t = ctypes.c_int

798

799

# All the function declarations below are from

800

# gnutls/abstract.h

801

pubkey_init = _library.gnutls_pubkey_init

802

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

803

pubkey_init.restype = _error_code

804

805

pubkey_import = _library.gnutls_pubkey_import

806

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

807

x509_crt_fmt_t]

808

pubkey_import.restype = _error_code

809

810

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

811

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

812

ctypes.POINTER(ctypes.c_ubyte),

813

ctypes.POINTER(ctypes.c_size_t)]

814

pubkey_get_key_id.restype = _error_code

815

816

pubkey_deinit = _library.gnutls_pubkey_deinit

817

pubkey_deinit.argtypes = [pubkey_t]

818

pubkey_deinit.restype = None

819

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

822

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

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

825

openpgp_crt_init.restype = _error_code

826

827

openpgp_crt_import = _library.gnutls_openpgp_crt_import

828

openpgp_crt_import.argtypes = [openpgp_crt_t,

829

ctypes.POINTER(datum_t),

830

openpgp_crt_fmt_t]

831

openpgp_crt_import.restype = _error_code

832

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

840

openpgp_crt_verify_self.restype = _error_code

841

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

843

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

844

openpgp_crt_deinit.restype = None

845

846

openpgp_crt_get_fingerprint = (

847

_library.gnutls_openpgp_crt_get_fingerprint)

848

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

849

ctypes.c_void_p,

850

ctypes.POINTER(

851

ctypes.c_size_t)]

852

openpgp_crt_get_fingerprint.restype = _error_code

853

854

if check_version(b"3.6.4"):

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

857

certificate_type_get2.restype = _error_code

858

859

# Remove non-public functions

860

del _error_code, _retry_on_error

861

862

863

def call_pipe(connection, # : multiprocessing.Connection

864

func, *args, **kwargs):

865

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

866

867

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

868

return value on the provided multiprocessing.Connection.

869

"""

870

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

871

connection.close()

872

873

874

class Client:

411

875

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

412

876

413

877

Attributes:

414

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

878

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

415

879

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

416

880

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

417

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

418

to see if the client lives.

419

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

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

421

885

checker_command: string; External command which is run to check

422

886

if client lives. %() expansions are done at

423

887

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

424

888

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

425

checker_initiator_tag: a gobject event source tag, or None

889

checker_initiator_tag: a GLib event source tag, or None

426

890

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

427

891

client_structure: Object describing what attributes a client has

428

892

and is used for storing the client at exit

429

893

current_checker_command: string; current running checker_command

430

disable_initiator_tag: a gobject event source tag, or None

894

disable_initiator_tag: a GLib event source tag, or None

431

895

enabled: bool()

432

896

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

433

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

434

900

host: string; available for use by the checker command

435

901

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

436

902

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

438

904

last_checker_status: integer between 0 and 255 reflecting exit

439

905

status of last checker. -1 reflects crashed

440

906

checker, -2 means no checker completed yet.

907

last_checker_signal: The signal which killed the last checker, if

908

last_checker_status is -1

441

909

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

442

910

443

911

D-Bus identifiers

450

918

disabled, or None

451

919

server_settings: The server_settings dict from main()

452

920

"""

453

921

454

922

runtime_expansions = ("approval_delay", "approval_duration",

455

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

923

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

456

924

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

457

925

"last_approval_request", "last_checked_ok",

458

926

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

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

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

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

469

927

client_defaults = {

928

"timeout": "PT5M",

929

"extended_timeout": "PT15M",

930

"interval": "PT2M",

931

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

932

"host": "",

933

"approval_delay": "PT0S",

934

"approval_duration": "PT1S",

935

"approved_by_default": "True",

936

"enabled": "True",

937

}

938

470

939

@staticmethod

471

940

def config_parser(config):

472

941

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

479

948

for client_name in config.sections():

480

949

section = dict(config.items(client_name))

481

950

client = settings[client_name] = {}

482

951

483

952

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

484

953

# Reformat values from string types to Python types

485

954

client["approved_by_default"] = config.getboolean(

486

955

client_name, "approved_by_default")

487

956

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

488

957

"enabled")

489

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(" ", ""))

490

964

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

491

965

.replace(" ", ""))

492

966

if "secret" in section:

493

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

967

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

968

.encode("utf-8"),

969

"base64")

494

970

elif "secfile" in section:

495

971

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

496

972

(section["secfile"])),

511

987

client["last_approval_request"] = None

512

988

client["last_checked_ok"] = None

513

989

client["last_checker_status"] = -2

514

990

515

991

return settings

516

517

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

992

993

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

518

994

self.name = name

519

995

if server_settings is None:

520

996

server_settings = {}

522

998

# adding all client settings

523

999

for setting, value in settings.items():

524

1000

setattr(self, setting, value)

525

1001

526

1002

if self.enabled:

527

1003

if not hasattr(self, "last_enabled"):

528

1004

self.last_enabled = datetime.datetime.utcnow()

532

1008

else:

533

1009

self.last_enabled = None

534

1010

self.expires = None

535

536

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

537

# Uppercase and remove spaces from fingerprint for later

538

# comparison purposes with return value from the fingerprint()

539

# function

540

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)

541

1015

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

542

1016

datetime.datetime.utcnow())

543

1017

544

1018

# attributes specific for this server instance

545

1019

self.checker = None

546

1020

self.checker_initiator_tag = None

549

1023

self.current_checker_command = None

550

1024

self.approved = None

551

1025

self.approvals_pending = 0

552

self.changedstate = (multiprocessing_manager

553

.Condition(multiprocessing_manager

554

.Lock()))

555

self.client_structure = [attr for attr in

556

self.__dict__.iterkeys()

1026

self.changedstate = multiprocessing_manager.Condition(

1027

multiprocessing_manager.Lock())

1028

self.client_structure = [attr

1029

for attr in self.__dict__.keys()

557

1030

if not attr.startswith("_")]

558

1031

self.client_structure.append("client_structure")

559

560

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

561

lambda obj:

562

isinstance(obj,

563

property)):

1032

1033

for name, t in inspect.getmembers(

1034

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

564

1035

if not name.startswith("_"):

565

1036

self.client_structure.append(name)

566

1037

567

1038

# Send notice to process children that client state has changed

568

1039

def send_changedstate(self):

569

1040

with self.changedstate:

570

1041

self.changedstate.notify_all()

571

1042

572

1043

def enable(self):

573

1044

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

574

1045

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

575

1046

# Already enabled

576

1047

return

577

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

578

1048

self.enabled = True

579

1049

self.last_enabled = datetime.datetime.utcnow()

580

1050

self.init_checker()

581

1051

self.send_changedstate()

582

1052

583

1053

def disable(self, quiet=True):

584

1054

"""Disable this client."""

585

1055

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

586

1056

return False

587

1057

if not quiet:

588

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

1058

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

589

1059

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

590

gobject.source_remove(self.disable_initiator_tag)

1060

GLib.source_remove(self.disable_initiator_tag)

591

1061

self.disable_initiator_tag = None

592

1062

self.expires = None

593

1063

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

594

gobject.source_remove(self.checker_initiator_tag)

1064

GLib.source_remove(self.checker_initiator_tag)

595

1065

self.checker_initiator_tag = None

596

1066

self.stop_checker()

597

1067

self.enabled = False

598

1068

if not quiet:

599

1069

self.send_changedstate()

600

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

1070

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

601

1071

return False

602

1072

603

1073

def __del__(self):

604

1074

self.disable()

605

606

def init_checker(self):

607

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

608

# and every interval from then on.

1075

1076

def init_checker(self, randomize_start=False):

1077

# Schedule a new checker to be started a randomly selected

1078

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

1079

# the startup of checkers over time when the server is

1080

# started.

609

1081

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

614

self.start_checker))

615

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

1082

GLib.source_remove(self.checker_initiator_tag)

1083

interval_milliseconds = int(self.interval.total_seconds()

1084

* 1000)

1085

if randomize_start:

1086

delay_milliseconds = random.randrange(

1087

interval_milliseconds + 1)

1088

else:

1089

delay_milliseconds = interval_milliseconds

1090

self.checker_initiator_tag = GLib.timeout_add(

1091

delay_milliseconds, self.start_checker, randomize_start)

1092

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

1093

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

1094

# expire at the soonest one interval after a checker was

1095

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

1096

# time might have to be extended.

1097

now = datetime.datetime.utcnow()

1098

self.expires = now + delay + self.interval

1099

# Schedule a disable() at expire time

616

1100

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

622

# Also start a new checker *right now*.

623

self.start_checker()

624

625

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

1101

GLib.source_remove(self.disable_initiator_tag)

1102

self.disable_initiator_tag = GLib.timeout_add(

1103

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

1104

self.disable)

1105

1106

def checker_callback(self, source, condition, connection,

1107

command):

626

1108

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

1109

# Read return code from connection (see call_pipe)

1110

returncode = connection.recv()

1111

connection.close()

1112

if self.checker is not None:

1113

self.checker.join()

627

1114

self.checker_callback_tag = None

628

1115

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1116

1117

if returncode >= 0:

1118

self.last_checker_status = returncode

1119

self.last_checker_signal = None

631

1120

if self.last_checker_status == 0:

632

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

633

vars(self))

1121

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

634

1122

self.checked_ok()

635

1123

else:

636

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

637

vars(self))

1124

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

638

1125

else:

639

1126

self.last_checker_status = -1

640

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

641

vars(self))

642

1127

self.last_checker_signal = -returncode

1128

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

1129

return False

1130

643

1131

def checked_ok(self):

644

1132

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

645

1133

self.last_checked_ok = datetime.datetime.utcnow()

646

1134

self.last_checker_status = 0

1135

self.last_checker_signal = None

647

1136

self.bump_timeout()

648

1137

649

1138

def bump_timeout(self, timeout=None):

650

1139

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

651

1140

if timeout is None:

652

1141

timeout = self.timeout

653

1142

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

1143

GLib.source_remove(self.disable_initiator_tag)

655

1144

self.disable_initiator_tag = None

656

1145

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

1146

self.disable_initiator_tag = GLib.timeout_add(

1147

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

660

1148

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

661

1149

662

1150

def need_approval(self):

663

1151

self.last_approval_request = datetime.datetime.utcnow()

664

665

def start_checker(self):

1152

1153

def start_checker(self, start_was_randomized=False):

666

1154

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

667

1155

668

1156

If a checker already exists, leave it running and do

669

1157

nothing."""

670

1158

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

675

1163

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

676

1164

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

677

1165

# should be.

678

679

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

680

try:

681

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

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

1166

1167

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

1168

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

1169

self.checker.join()

1170

self.checker = None

693

1171

# Start a new checker if needed

694

1172

if self.checker is None:

695

1173

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

1174

escaped_attrs = {

1175

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

1176

for attr in self.runtime_expansions}

699

1177

try:

700

1178

command = self.checker_command % escaped_attrs

701

1179

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

1180

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

1181

self.checker_command, exc_info=error)

1182

return True # Try again later

705

1183

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

721

self.checker = subprocess.Popen(command,

722

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

736

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

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

747

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

1184

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

1185

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

1186

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

1187

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

1188

# always replaced by /dev/null.)

1189

# The exception is when not debugging but nevertheless

1190

# running in the foreground; use the previously

1191

# created wnull.

1192

popen_args = {"close_fds": True,

1193

"shell": True,

1194

"cwd": "/"}

1195

if (not self.server_settings["debug"]

1196

and self.server_settings["foreground"]):

1197

popen_args.update({"stdout": wnull,

1198

"stderr": wnull})

1199

pipe = multiprocessing.Pipe(duplex=False)

1200

self.checker = multiprocessing.Process(

1201

target=call_pipe,

1202

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

1203

kwargs=popen_args)

1204

self.checker.start()

1205

self.checker_callback_tag = GLib.io_add_watch(

1206

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

1207

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1208

self.checker_callback, pipe[0], command)

1209

if start_was_randomized:

1210

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

1211

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

1212

# interval from then on.

1213

now = datetime.datetime.utcnow()

1214

self.checker_initiator_tag = GLib.timeout_add(

1215

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

1216

self.start_checker)

1217

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

1218

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

1219

return False

1220

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

748

1221

return True

749

1222

750

1223

def stop_checker(self):

751

1224

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

752

1225

if self.checker_callback_tag:

753

gobject.source_remove(self.checker_callback_tag)

1226

GLib.source_remove(self.checker_callback_tag)

754

1227

self.checker_callback_tag = None

755

1228

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

756

1229

return

757

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

758

try:

759

self.checker.terminate()

760

#time.sleep(0.5)

761

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

762

# self.checker.kill()

763

except OSError as error:

764

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

765

raise

1230

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

1231

self.checker.terminate()

766

1232

self.checker = None

767

1233

768

1234

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

1235

def dbus_service_property(dbus_interface,

1236

signature="v",

1237

access="readwrite",

1238

byte_arrays=False):

771

1239

"""Decorators for marking methods of a DBusObjectWithProperties to

772

1240

become properties on the D-Bus.

773

1241

774

1242

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

775

1243

and with one argument by "Set".

776

1244

777

1245

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

778

1246

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

779

1247

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

783

1251

if byte_arrays and signature != "ay":

784

1252

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

785

1253

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

1254

786

1255

def decorator(func):

787

1256

func._dbus_is_property = True

788

1257

func._dbus_interface = dbus_interface

791

1260

func._dbus_name = func.__name__

792

1261

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

793

1262

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

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1263

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

795

1264

return func

1265

796

1266

return decorator

797

1267

798

1268

799

1269

def dbus_interface_annotations(dbus_interface):

800

1270

"""Decorator for marking functions returning interface annotations

801

1271

802

1272

Usage:

803

1273

804

1274

@dbus_interface_annotations("org.example.Interface")

805

1275

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

806

1276

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

807

1277

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

808

1278

"false"}

809

1279

"""

1280

810

1281

def decorator(func):

811

1282

func._dbus_is_interface = True

812

1283

func._dbus_interface = dbus_interface

813

1284

func._dbus_name = dbus_interface

814

1285

return func

1286

815

1287

return decorator

816

1288

817

1289

818

1290

def dbus_annotations(annotations):

819

1291

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

820

1292

Usage:

821

1293

822

1294

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

823

1295

"org.freedesktop.DBus.Property."

824

1296

"EmitsChangedSignal": "false"})

826

1298

access="r")

827

1299

def Property_dbus_property(self):

828

1300

return dbus.Boolean(False)

1301

1302

See also the DBusObjectWithAnnotations class.

829

1303

"""

1304

830

1305

def decorator(func):

831

1306

func._dbus_annotations = annotations

832

1307

return func

1308

833

1309

return decorator

834

1310

835

1311

838

1314

"""

839

1315

pass

840

1316

1317

841

1318

class DBusPropertyAccessException(DBusPropertyException):

842

1319

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

843

1320

"""

850

1327

pass

851

1328

852

1329

853

class DBusObjectWithProperties(dbus.service.Object):

854

"""A D-Bus object with properties.

855

856

Classes inheriting from this can use the dbus_service_property

857

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

858

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

1330

class DBusObjectWithAnnotations(dbus.service.Object):

1331

"""A D-Bus object with annotations.

1332

1333

Classes inheriting from this can use the dbus_annotations

1334

decorator to add annotations to methods or signals.

859

1335

"""

860

1336

861

1337

@staticmethod

862

1338

def _is_dbus_thing(thing):

863

1339

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

864

1340

865

1341

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

866

1342

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

867

1343

"""

868

1344

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

869

1345

False)

870

1346

871

1347

def _get_all_dbus_things(self, thing):

872

1348

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

873

1349

"""

874

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

875

name),

1350

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

876

1351

athing.__get__(self))

877

1352

for cls in self.__class__.__mro__

878

1353

for name, athing in

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

881

1354

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

1355

1356

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1357

out_signature="s",

1358

path_keyword="object_path",

1359

connection_keyword="connection")

1360

def Introspect(self, object_path, connection):

1361

"""Overloading of standard D-Bus method.

1362

1363

Inserts annotation tags on methods and signals.

1364

"""

1365

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

1366

connection)

1367

try:

1368

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

1369

1370

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

1371

# Add annotation tags

1372

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

1373

for tag in if_tag.getElementsByTagName(typ):

1374

annots = dict()

1375

for name, prop in (self.

1376

_get_all_dbus_things(typ)):

1377

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

1378

and prop._dbus_interface

1379

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

1380

annots.update(getattr(

1381

prop, "_dbus_annotations", {}))

1382

for name, value in annots.items():

1383

ann_tag = document.createElement(

1384

"annotation")

1385

ann_tag.setAttribute("name", name)

1386

ann_tag.setAttribute("value", value)

1387

tag.appendChild(ann_tag)

1388

# Add interface annotation tags

1389

for annotation, value in dict(

1390

itertools.chain.from_iterable(

1391

annotations().items()

1392

for name, annotations

1393

in self._get_all_dbus_things("interface")

1394

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

1395

)).items():

1396

ann_tag = document.createElement("annotation")

1397

ann_tag.setAttribute("name", annotation)

1398

ann_tag.setAttribute("value", value)

1399

if_tag.appendChild(ann_tag)

1400

# Fix argument name for the Introspect method itself

1401

if (if_tag.getAttribute("name")

1402

== dbus.INTROSPECTABLE_IFACE):

1403

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

1404

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

1405

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

1406

if (arg.getAttribute("direction")

1407

== "out"):

1408

arg.setAttribute("name",

1409

"xml_data")

1410

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

1411

document.unlink()

1412

except (AttributeError, xml.dom.DOMException,

1413

xml.parsers.expat.ExpatError) as error:

1414

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

1415

exc_info=error)

1416

return xmlstring

1417

1418

1419

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1420

"""A D-Bus object with properties.

1421

1422

Classes inheriting from this can use the dbus_service_property

1423

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

1424

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

1425

"""

1426

882

1427

def _get_dbus_property(self, interface_name, property_name):

883

1428

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

884

1429

property with the specified name and interface.

885

1430

"""

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

1431

for cls in self.__class__.__mro__:

1432

for name, value in inspect.getmembers(

1433

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

890

1434

if (value._dbus_name == property_name

891

1435

and value._dbus_interface == interface_name):

892

1436

return value.__get__(self)

893

1437

894

1438

# No such property

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

898

899

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

1439

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

1440

self.dbus_object_path, interface_name, property_name))

1441

1442

@classmethod

1443

def _get_all_interface_names(cls):

1444

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

1445

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

1446

"_dbus_interface", None)

1447

for x in (inspect.getmro(cls))

1448

for attr in dir(x))

1449

if name is not None)

1450

1451

@dbus.service.method(dbus.PROPERTIES_IFACE,

1452

in_signature="ss",

900

1453

out_signature="v")

901

1454

def Get(self, interface_name, property_name):

902

1455

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

908

1461

if not hasattr(value, "variant_level"):

909

1462

return value

910

1463

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

911

1464

912

1465

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

913

1466

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

914

1467

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

923

1476

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

924

1477

"'ay' signature {!r}"

925

1478

.format(prop._dbus_signature))

926

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

927

for byte in value))

1479

value = dbus.ByteArray(bytes(value))

928

1480

prop(value)

929

930

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

1481

1482

@dbus.service.method(dbus.PROPERTIES_IFACE,

1483

in_signature="s",

931

1484

out_signature="a{sv}")

932

1485

def GetAll(self, interface_name):

933

1486

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

934

1487

standard.

935

1488

936

1489

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

937

1490

"""

938

1491

properties = {}

948

1501

if not hasattr(value, "variant_level"):

949

1502

properties[name] = value

950

1503

continue

951

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

952

value.variant_level+1)

1504

properties[name] = type(value)(

1505

value, variant_level=value.variant_level + 1)

953

1506

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

954

1507

955

1508

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

956

1509

def PropertiesChanged(self, interface_name, changed_properties,

957

1510

invalidated_properties):

959

1512

standard.

960

1513

"""

961

1514

pass

962

1515

963

1516

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

964

1517

out_signature="s",

965

path_keyword='object_path',

966

connection_keyword='connection')

1518

path_keyword="object_path",

1519

connection_keyword="connection")

967

1520

def Introspect(self, object_path, connection):

968

1521

"""Overloading of standard D-Bus method.

969

1522

970

1523

Inserts property tags and interface annotation tags.

971

1524

"""

972

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

973

connection)

1525

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1526

object_path,

1527

connection)

974

1528

try:

975

1529

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

1530

976

1531

def make_tag(document, name, prop):

977

1532

e = document.createElement("property")

978

1533

e.setAttribute("name", name)

979

1534

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

980

1535

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

981

1536

return e

1537

982

1538

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

983

1539

# Add property tags

984

1540

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

987

1543

if prop._dbus_interface

988

1544

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

989

1545

if_tag.appendChild(tag)

990

# Add annotation tags

991

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

992

for tag in if_tag.getElementsByTagName(typ):

993

annots = dict()

994

for name, prop in (self.

995

_get_all_dbus_things(typ)):

996

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

997

and prop._dbus_interface

998

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

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1003

for name, value in annots.items():

1004

ann_tag = document.createElement(

1005

"annotation")

1006

ann_tag.setAttribute("name", name)

1007

ann_tag.setAttribute("value", value)

1008

tag.appendChild(ann_tag)

1009

# Add interface annotation tags

1010

for annotation, value in dict(

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

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

1016

)).items():

1017

ann_tag = document.createElement("annotation")

1018

ann_tag.setAttribute("name", annotation)

1019

ann_tag.setAttribute("value", value)

1020

if_tag.appendChild(ann_tag)

1546

# Add annotation tags for properties

1547

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

1548

annots = dict()

1549

for name, prop in self._get_all_dbus_things(

1550

"property"):

1551

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

1552

and prop._dbus_interface

1553

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

1554

annots.update(getattr(

1555

prop, "_dbus_annotations", {}))

1556

for name, value in annots.items():

1557

ann_tag = document.createElement(

1558

"annotation")

1559

ann_tag.setAttribute("name", name)

1560

ann_tag.setAttribute("value", value)

1561

tag.appendChild(ann_tag)

1021

1562

# Add the names to the return values for the

1022

1563

# "org.freedesktop.DBus.Properties" methods

1023

1564

if (if_tag.getAttribute("name")

1037

1578

document.unlink()

1038

1579

except (AttributeError, xml.dom.DOMException,

1039

1580

xml.parsers.expat.ExpatError) as error:

1040

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

1041

exc_info=error)

1581

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

1582

exc_info=error)

1583

return xmlstring

1584

1585

1586

try:

1587

dbus.OBJECT_MANAGER_IFACE

1588

except AttributeError:

1589

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

1590

1591

1592

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1593

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

1594

1595

Classes inheriting from this exposes the standard

1596

GetManagedObjects call and the InterfacesAdded and

1597

InterfacesRemoved signals on the standard

1598

"org.freedesktop.DBus.ObjectManager" interface.

1599

1600

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

1601

manually.

1602

"""

1603

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1604

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

1605

def GetManagedObjects(self):

1606

"""This function must be overridden"""

1607

raise NotImplementedError()

1608

1609

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1610

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

1611

def InterfacesAdded(self, object_path, interfaces_and_properties):

1612

pass

1613

1614

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

1615

def InterfacesRemoved(self, object_path, interfaces):

1616

pass

1617

1618

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1619

out_signature="s",

1620

path_keyword="object_path",

1621

connection_keyword="connection")

1622

def Introspect(self, object_path, connection):

1623

"""Overloading of standard D-Bus method.

1624

1625

Override return argument name of GetManagedObjects to be

1626

"objpath_interfaces_and_properties"

1627

"""

1628

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1629

object_path,

1630

connection)

1631

try:

1632

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

1633

1634

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

1635

# Fix argument name for the GetManagedObjects method

1636

if (if_tag.getAttribute("name")

1637

== dbus.OBJECT_MANAGER_IFACE):

1638

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

1639

if (cn.getAttribute("name")

1640

== "GetManagedObjects"):

1641

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

1642

if (arg.getAttribute("direction")

1643

== "out"):

1644

arg.setAttribute(

1645

"name",

1646

"objpath_interfaces"

1647

"_and_properties")

1648

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

1649

document.unlink()

1650

except (AttributeError, xml.dom.DOMException,

1651

xml.parsers.expat.ExpatError) as error:

1652

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

1653

exc_info=error)

1042

1654

return xmlstring

1043

1655

1044

1656

1045

1657

def datetime_to_dbus(dt, variant_level=0):

1046

1658

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

1047

1659

if dt is None:

1048

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1660

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

1661

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

1051

1662

1052

1663

1053

1664

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1055

1666

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

1056

1667

interface names according to the "alt_interface_names" mapping.

1057

1668

Usage:

1058

1669

1059

1670

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

1060

1671

"net.example.AlternateInterface"})

1061

1672

class SampleDBusObject(dbus.service.Object):

1062

1673

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

1063

1674

def SampleDBusMethod():

1064

1675

pass

1065

1676

1066

1677

The above "SampleDBusMethod" on "SampleDBusObject" will be

1067

1678

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

1068

1679

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

1069

1680

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

1070

1681

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

1071

1682

1072

1683

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

1073

1684

(from DBusObjectWithProperties) and interfaces (from the

1074

1685

dbus_interface_annotations decorator).

1075

1686

"""

1687

1076

1688

def wrapper(cls):

1077

1689

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1690

alt_interface_names.items()):

1079

1691

attr = {}

1080

1692

interface_names = set()

1081

1693

# Go though all attributes of the class

1083

1695

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

1084

1696

# with the wrong interface name

1085

1697

if (not hasattr(attribute, "_dbus_interface")

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1698

or not attribute._dbus_interface.startswith(

1699

orig_interface_name)):

1088

1700

continue

1089

1701

# Create an alternate D-Bus interface name based on

1090

1702

# the current name

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1703

alt_interface = attribute._dbus_interface.replace(

1704

orig_interface_name, alt_interface_name)

1094

1705

interface_names.add(alt_interface)

1095

1706

# Is this a D-Bus signal?

1096

1707

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

1097

1708

# Extract the original non-method undecorated

1098

1709

# function by black magic

1099

nonmethod_func = (dict(

1710

if sys.version_info.major == 2:

1711

nonmethod_func = (dict(

1100

1712

zip(attribute.func_code.co_freevars,

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1713

attribute.__closure__))

1714

["func"].cell_contents)

1715

else:

1716

nonmethod_func = (dict(

1717

zip(attribute.__code__.co_freevars,

1718

attribute.__closure__))

1719

["func"].cell_contents)

1103

1720

# Create a new, but exactly alike, function

1104

1721

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

1105

1722

# with the alternate D-Bus interface name

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1109

(types.FunctionType(

1110

nonmethod_func.func_code,

1111

nonmethod_func.func_globals,

1112

nonmethod_func.func_name,

1113

nonmethod_func.func_defaults,

1114

nonmethod_func.func_closure)))

1723

new_function = copy_function(nonmethod_func)

1724

new_function = (dbus.service.signal(

1725

alt_interface,

1726

attribute._dbus_signature)(new_function))

1115

1727

# Copy annotations, if any

1116

1728

try:

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1729

new_function._dbus_annotations = dict(

1730

attribute._dbus_annotations)

1119

1731

except AttributeError:

1120

1732

pass

1733

1121

1734

# Define a creator of a function to call both the

1122

1735

# original and alternate functions, so both the

1123

1736

# original and alternate signals gets sent when

1126

1739

"""This function is a scope container to pass

1127

1740

func1 and func2 to the "call_both" function

1128

1741

outside of its arguments"""

1742

1743

@functools.wraps(func2)

1129

1744

def call_both(*args, **kwargs):

1130

1745

"""This function will emit two D-Bus

1131

1746

signals by calling func1 and func2"""

1132

1747

func1(*args, **kwargs)

1133

1748

func2(*args, **kwargs)

1749

# Make wrapper function look like a D-Bus

1750

# signal

1751

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

1752

if name.startswith("_dbus_"):

1753

setattr(call_both, name, attr)

1754

1134

1755

return call_both

1135

1756

# Create the "call_both" function and add it to

1136

1757

# the class

1141

1762

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

1142

1763

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

1143

1764

# to the class.

1144

attr[attrname] = (dbus.service.method

1145

(alt_interface,

1146

attribute._dbus_in_signature,

1147

attribute._dbus_out_signature)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1765

attr[attrname] = (

1766

dbus.service.method(

1767

alt_interface,

1768

attribute._dbus_in_signature,

1769

attribute._dbus_out_signature)

1770

(copy_function(attribute)))

1154

1771

# Copy annotations, if any

1155

1772

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1773

attr[attrname]._dbus_annotations = dict(

1774

attribute._dbus_annotations)

1158

1775

except AttributeError:

1159

1776

pass

1160

1777

# Is this a D-Bus property?

1163

1780

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

1164

1781

# property with the alternate D-Bus interface

1165

1782

# name. Add it to the class.

1166

attr[attrname] = (dbus_service_property

1167

(alt_interface,

1168

attribute._dbus_signature,

1169

attribute._dbus_access,

1170

attribute

1171

._dbus_get_args_options

1172

["byte_arrays"])

1173

(types.FunctionType

1174

(attribute.func_code,

1175

attribute.func_globals,

1176

attribute.func_name,

1177

attribute.func_defaults,

1178

attribute.func_closure)))

1783

attr[attrname] = (dbus_service_property(

1784

alt_interface, attribute._dbus_signature,

1785

attribute._dbus_access,

1786

attribute._dbus_get_args_options

1787

["byte_arrays"])

1788

(copy_function(attribute)))

1179

1789

# Copy annotations, if any

1180

1790

try:

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1791

attr[attrname]._dbus_annotations = dict(

1792

attribute._dbus_annotations)

1183

1793

except AttributeError:

1184

1794

pass

1185

1795

# Is this a D-Bus interface?

1188

1798

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

1189

1799

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

1190

1800

# to the class.

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1801

attr[attrname] = (

1802

dbus_interface_annotations(alt_interface)

1803

(copy_function(attribute)))

1199

1804

if deprecate:

1200

1805

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1806

iname = "_AlternateDBusNames_interface_annotation{}"

1202

1807

for interface_name in interface_names:

1808

1203

1809

@dbus_interface_annotations(interface_name)

1204

1810

def func(self):

1205

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

1206

"true" }

1811

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

1812

"true"}

1207

1813

# Find an unused name

1208

1814

for aname in (iname.format(i)

1209

1815

for i in itertools.count()):

1213

1819

if interface_names:

1214

1820

# Replace the class with a new subclass of it with

1215

1821

# methods, signals, etc. as created above.

1216

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

1217

(cls,), attr)

1822

if sys.version_info.major == 2:

1823

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

1824

(cls, ), attr)

1825

else:

1826

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

1827

(cls, ), attr)

1218

1828

return cls

1829

1219

1830

return wrapper

1220

1831

1221

1832

1222

1833

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

1223

"se.bsnet.fukt.Mandos"})

1834

"se.bsnet.fukt.Mandos"})

1224

1835

class ClientDBus(Client, DBusObjectWithProperties):

1225

1836

"""A Client class using D-Bus

1226

1837

1227

1838

Attributes:

1228

1839

dbus_object_path: dbus.ObjectPath

1229

1840

bus: dbus.SystemBus()

1230

1841

"""

1231

1842

1232

1843

runtime_expansions = (Client.runtime_expansions

1233

+ ("dbus_object_path",))

1234

1844

+ ("dbus_object_path", ))

1845

1235

1846

_interface = "se.recompile.Mandos.Client"

1236

1847

1237

1848

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

1238

1239

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

1849

1850

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

1240

1851

self.bus = bus

1241

1852

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

1242

1853

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

1244

1855

client_object_name = str(self.name).translate(

1245

1856

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

1246

1857

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

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1858

self.dbus_object_path = dbus.ObjectPath(

1859

"/clients/" + client_object_name)

1249

1860

DBusObjectWithProperties.__init__(self, self.bus,

1250

1861

self.dbus_object_path)

1251

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1862

1863

def notifychangeproperty(transform_func, dbus_name,

1864

type_func=lambda x: x,

1865

variant_level=1,

1866

invalidate_only=False,

1255

1867

_interface=_interface):

1256

1868

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

1257

1869

its changes to DBus.

1258

1870

1259

1871

transform_fun: Function that takes a value and a variant_level

1260

1872

and transforms it to a D-Bus type.

1261

1873

dbus_name: D-Bus name of the variable

1264

1876

variant_level: D-Bus variant level. Default: 1

1265

1877

"""

1266

1878

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

1879

1267

1880

def setter(self, value):

1268

1881

if hasattr(self, "dbus_object_path"):

1269

1882

if (not hasattr(self, attrname) or

1270

1883

type_func(getattr(self, attrname, None))

1271

1884

!= type_func(value)):

1272

1885

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1886

self.PropertiesChanged(

1887

_interface, dbus.Dictionary(),

1888

dbus.Array((dbus_name, )))

1277

1889

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1890

dbus_value = transform_func(

1891

type_func(value),

1892

variant_level=variant_level)

1281

1893

self.PropertyChanged(dbus.String(dbus_name),

1282

1894

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1895

self.PropertiesChanged(

1896

_interface,

1897

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

1898

dbus_value}),

1899

dbus.Array())

1287

1900

setattr(self, attrname, value)

1288

1901

1289

1902

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

1290

1903

1291

1904

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1292

1905

approvals_pending = notifychangeproperty(dbus.Boolean,

1293

1906

"ApprovalPending",

1294

type_func = bool)

1907

type_func=bool)

1295

1908

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

1296

1909

last_enabled = notifychangeproperty(datetime_to_dbus,

1297

1910

"LastEnabled")

1298

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

1299

type_func = lambda checker:

1300

checker is not None)

1911

checker = notifychangeproperty(

1912

dbus.Boolean, "CheckerRunning",

1913

type_func=lambda checker: checker is not None)

1301

1914

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1302

1915

"LastCheckedOK")

1303

1916

last_checker_status = notifychangeproperty(dbus.Int16,

1306

1919

datetime_to_dbus, "LastApprovalRequest")

1307

1920

approved_by_default = notifychangeproperty(dbus.Boolean,

1308

1921

"ApprovedByDefault")

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1922

approval_delay = notifychangeproperty(

1923

dbus.UInt64, "ApprovalDelay",

1924

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

1314

1925

approval_duration = notifychangeproperty(

1315

1926

dbus.UInt64, "ApprovalDuration",

1316

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

1927

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

1317

1928

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1929

timeout = notifychangeproperty(

1930

dbus.UInt64, "Timeout",

1931

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

1321

1932

extended_timeout = notifychangeproperty(

1322

1933

dbus.UInt64, "ExtendedTimeout",

1323

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

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1934

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

1935

interval = notifychangeproperty(

1936

dbus.UInt64, "Interval",

1937

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

1329

1938

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

1330

1939

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

1331

1940

invalidate_only=True)

1332

1941

1333

1942

del notifychangeproperty

1334

1943

1335

1944

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

1336

1945

try:

1337

1946

self.remove_from_connection()

1340

1949

if hasattr(DBusObjectWithProperties, "__del__"):

1341

1950

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

1342

1951

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

1343

1344

def checker_callback(self, pid, condition, command,

1345

*args, **kwargs):

1346

self.checker_callback_tag = None

1347

self.checker = None

1348

if os.WIFEXITED(condition):

1349

exitstatus = os.WEXITSTATUS(condition)

1952

1953

def checker_callback(self, source, condition,

1954

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

1955

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

1956

connection, command, *args,

1957

**kwargs)

1958

exitstatus = self.last_checker_status

1959

if exitstatus >= 0:

1350

1960

# Emit D-Bus signal

1351

1961

self.CheckerCompleted(dbus.Int16(exitstatus),

1352

dbus.Int64(condition),

1962

# This is specific to GNU libC

1963

dbus.Int64(exitstatus << 8),

1353

1964

dbus.String(command))

1354

1965

else:

1355

1966

# Emit D-Bus signal

1356

1967

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

1357

dbus.Int64(condition),

1968

dbus.Int64(

1969

# This is specific to GNU libC

1970

(exitstatus << 8)

1971

| self.last_checker_signal),

1358

1972

dbus.String(command))

1359

1360

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

1361

*args, **kwargs)

1362

1973

return ret

1974

1363

1975

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

1364

1976

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

1365

1977

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

1369

1981

# Emit D-Bus signal

1370

1982

self.CheckerStarted(self.current_checker_command)

1371

1983

return r

1372

1984

1373

1985

def _reset_approved(self):

1374

1986

self.approved = None

1375

1987

return False

1376

1988

1377

1989

def approve(self, value=True):

1378

1990

self.approved = value

1379

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

1380

* 1000), self._reset_approved)

1991

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

1992

* 1000), self._reset_approved)

1381

1993

self.send_changedstate()

1382

1383

## D-Bus methods, signals & properties

1384

1385

## Interfaces

1386

1387

## Signals

1388

1994

1995

# D-Bus methods, signals & properties

1996

1997

# Interfaces

1998

1999

# Signals

2000

1389

2001

# CheckerCompleted - signal

1390

2002

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

1391

2003

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

1392

2004

"D-Bus signal"

1393

2005

pass

1394

2006

1395

2007

# CheckerStarted - signal

1396

2008

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

1397

2009

def CheckerStarted(self, command):

1398

2010

"D-Bus signal"

1399

2011

pass

1400

2012

1401

2013

# PropertyChanged - signal

1402

2014

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

1403

2015

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

1404

2016

def PropertyChanged(self, property, value):

1405

2017

"D-Bus signal"

1406

2018

pass

1407

2019

1408

2020

# GotSecret - signal

1409

2021

@dbus.service.signal(_interface)

1410

2022

def GotSecret(self):

1413

2025

server to mandos-client

1414

2026

"""

1415

2027

pass

1416

2028

1417

2029

# Rejected - signal

1418

2030

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

1419

2031

def Rejected(self, reason):

1420

2032

"D-Bus signal"

1421

2033

pass

1422

2034

1423

2035

# NeedApproval - signal

1424

2036

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

1425

2037

def NeedApproval(self, timeout, default):

1426

2038

"D-Bus signal"

1427

2039

return self.need_approval()

1428

1429

## Methods

1430

2040

2041

# Methods

2042

1431

2043

# Approve - method

1432

2044

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

1433

2045

def Approve(self, value):

1434

2046

self.approve(value)

1435

2047

1436

2048

# CheckedOK - method

1437

2049

@dbus.service.method(_interface)

1438

2050

def CheckedOK(self):

1439

2051

self.checked_ok()

1440

2052

1441

2053

# Enable - method

2054

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

1442

2055

@dbus.service.method(_interface)

1443

2056

def Enable(self):

1444

2057

"D-Bus method"

1445

2058

self.enable()

1446

2059

1447

2060

# StartChecker - method

2061

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

1448

2062

@dbus.service.method(_interface)

1449

2063

def StartChecker(self):

1450

2064

"D-Bus method"

1451

2065

self.start_checker()

1452

2066

1453

2067

# Disable - method

2068

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

1454

2069

@dbus.service.method(_interface)

1455

2070

def Disable(self):

1456

2071

"D-Bus method"

1457

2072

self.disable()

1458

2073

1459

2074

# StopChecker - method

2075

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

1460

2076

@dbus.service.method(_interface)

1461

2077

def StopChecker(self):

1462

2078

self.stop_checker()

1463

1464

## Properties

1465

2079

2080

# Properties

2081

1466

2082

# ApprovalPending - property

1467

2083

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

1468

2084

def ApprovalPending_dbus_property(self):

1469

2085

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

1470

2086

1471

2087

# ApprovedByDefault - property

1472

@dbus_service_property(_interface, signature="b",

2088

@dbus_service_property(_interface,

2089

signature="b",

1473

2090

access="readwrite")

1474

2091

def ApprovedByDefault_dbus_property(self, value=None):

1475

2092

if value is None: # get

1476

2093

return dbus.Boolean(self.approved_by_default)

1477

2094

self.approved_by_default = bool(value)

1478

2095

1479

2096

# ApprovalDelay - property

1480

@dbus_service_property(_interface, signature="t",

2097

@dbus_service_property(_interface,

2098

signature="t",

1481

2099

access="readwrite")

1482

2100

def ApprovalDelay_dbus_property(self, value=None):

1483

2101

if value is None: # get

1484

2102

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

1485

2103

* 1000)

1486

2104

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

1487

2105

1488

2106

# ApprovalDuration - property

1489

@dbus_service_property(_interface, signature="t",

2107

@dbus_service_property(_interface,

2108

signature="t",

1490

2109

access="readwrite")

1491

2110

def ApprovalDuration_dbus_property(self, value=None):

1492

2111

if value is None: # get

1493

2112

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

1494

2113

* 1000)

1495

2114

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

1496

2115

1497

2116

# Name - property

2117

@dbus_annotations(

2118

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

1498

2119

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

1499

2120

def Name_dbus_property(self):

1500

2121

return dbus.String(self.name)

1501

2122

2123

# KeyID - property

2124

@dbus_annotations(

2125

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

2126

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

2127

def KeyID_dbus_property(self):

2128

return dbus.String(self.key_id)

2129

1502

2130

# Fingerprint - property

2131

@dbus_annotations(

2132

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

1503

2133

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

1504

2134

def Fingerprint_dbus_property(self):

1505

2135

return dbus.String(self.fingerprint)

1506

2136

1507

2137

# Host - property

1508

@dbus_service_property(_interface, signature="s",

2138

@dbus_service_property(_interface,

2139

signature="s",

1509

2140

access="readwrite")

1510

2141

def Host_dbus_property(self, value=None):

1511

2142

if value is None: # get

1512

2143

return dbus.String(self.host)

1513

2144

self.host = str(value)

1514

2145

1515

2146

# Created - property

2147

@dbus_annotations(

2148

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

1516

2149

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

1517

2150

def Created_dbus_property(self):

1518

2151

return datetime_to_dbus(self.created)

1519

2152

1520

2153

# LastEnabled - property

1521

2154

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

1522

2155

def LastEnabled_dbus_property(self):

1523

2156

return datetime_to_dbus(self.last_enabled)

1524

2157

1525

2158

# Enabled - property

1526

@dbus_service_property(_interface, signature="b",

2159

@dbus_service_property(_interface,

2160

signature="b",

1527

2161

access="readwrite")

1528

2162

def Enabled_dbus_property(self, value=None):

1529

2163

if value is None: # get

1532

2166

self.enable()

1533

2167

else:

1534

2168

self.disable()

1535

2169

1536

2170

# LastCheckedOK - property

1537

@dbus_service_property(_interface, signature="s",

2171

@dbus_service_property(_interface,

2172

signature="s",

1538

2173

access="readwrite")

1539

2174

def LastCheckedOK_dbus_property(self, value=None):

1540

2175

if value is not None:

1541

2176

self.checked_ok()

1542

2177

return

1543

2178

return datetime_to_dbus(self.last_checked_ok)

1544

2179

1545

2180

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

2181

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

1548

2182

def LastCheckerStatus_dbus_property(self):

1549

2183

return dbus.Int16(self.last_checker_status)

1550

2184

1551

2185

# Expires - property

1552

2186

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

1553

2187

def Expires_dbus_property(self):

1554

2188

return datetime_to_dbus(self.expires)

1555

2189

1556

2190

# LastApprovalRequest - property

1557

2191

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

1558

2192

def LastApprovalRequest_dbus_property(self):

1559

2193

return datetime_to_dbus(self.last_approval_request)

1560

2194

1561

2195

# Timeout - property

1562

@dbus_service_property(_interface, signature="t",

2196

@dbus_service_property(_interface,

2197

signature="t",

1563

2198

access="readwrite")

1564

2199

def Timeout_dbus_property(self, value=None):

1565

2200

if value is None: # get

1577

2212

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

1578

2213

is None):

1579

2214

return

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

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

1584

* 1000), self.disable))

1585

2215

GLib.source_remove(self.disable_initiator_tag)

2216

self.disable_initiator_tag = GLib.timeout_add(

2217

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

2218

self.disable)

2219

1586

2220

# ExtendedTimeout - property

1587

@dbus_service_property(_interface, signature="t",

2221

@dbus_service_property(_interface,

2222

signature="t",

1588

2223

access="readwrite")

1589

2224

def ExtendedTimeout_dbus_property(self, value=None):

1590

2225

if value is None: # get

1591

2226

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

1592

2227

* 1000)

1593

2228

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

1594

2229

1595

2230

# Interval - property

1596

@dbus_service_property(_interface, signature="t",

2231

@dbus_service_property(_interface,

2232

signature="t",

1597

2233

access="readwrite")

1598

2234

def Interval_dbus_property(self, value=None):

1599

2235

if value is None: # get

1603

2239

return

1604

2240

if self.enabled:

1605

2241

# Reschedule checker run

1606

gobject.source_remove(self.checker_initiator_tag)

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1610

2242

GLib.source_remove(self.checker_initiator_tag)

2243

self.checker_initiator_tag = GLib.timeout_add(

2244

value, self.start_checker)

2245

self.start_checker() # Start one now, too

2246

1611

2247

# Checker - property

1612

@dbus_service_property(_interface, signature="s",

2248

@dbus_service_property(_interface,

2249

signature="s",

1613

2250

access="readwrite")

1614

2251

def Checker_dbus_property(self, value=None):

1615

2252

if value is None: # get

1616

2253

return dbus.String(self.checker_command)

1617

2254

self.checker_command = str(value)

1618

2255

1619

2256

# CheckerRunning - property

1620

@dbus_service_property(_interface, signature="b",

2257

@dbus_service_property(_interface,

2258

signature="b",

1621

2259

access="readwrite")

1622

2260

def CheckerRunning_dbus_property(self, value=None):

1623

2261

if value is None: # get

1626

2264

self.start_checker()

1627

2265

else:

1628

2266

self.stop_checker()

1629

2267

1630

2268

# ObjectPath - property

2269

@dbus_annotations(

2270

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

2271

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

1631

2272

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

1632

2273

def ObjectPath_dbus_property(self):

1633

return self.dbus_object_path # is already a dbus.ObjectPath

1634

2274

return self.dbus_object_path # is already a dbus.ObjectPath

2275

1635

2276

# Secret = property

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

2277

@dbus_annotations(

2278

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

2279

"invalidates"})

2280

@dbus_service_property(_interface,

2281

signature="ay",

2282

access="write",

2283

byte_arrays=True)

1638

2284

def Secret_dbus_property(self, value):

1639

2285

self.secret = bytes(value)

1640

2286

1641

2287

del _interface

1642

2288

1643

2289

1644

class ProxyClient(object):

1645

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

2290

class ProxyClient:

2291

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

1646

2292

self._pipe = child_pipe

1647

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

2293

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

1648

2294

if not self._pipe.recv():

1649

raise KeyError()

1650

2295

raise KeyError(key_id or fpr)

2296

1651

2297

def __getattribute__(self, name):

1652

if name == '_pipe':

2298

if name == "_pipe":

1653

2299

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

1654

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

2300

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

1655

2301

data = self._pipe.recv()

1656

if data[0] == 'data':

2302

if data[0] == "data":

1657

2303

return data[1]

1658

if data[0] == 'function':

2304

if data[0] == "function":

2305

1659

2306

def func(*args, **kwargs):

1660

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

2307

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

1661

2308

return self._pipe.recv()[1]

2309

1662

2310

return func

1663

2311

1664

2312

def __setattr__(self, name, value):

1665

if name == '_pipe':

2313

if name == "_pipe":

1666

2314

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

1667

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

2315

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

1668

2316

1669

2317

1670

2318

class ClientHandler(socketserver.BaseRequestHandler, object):

1671

2319

"""A class to handle client connections.

1672

2320

1673

2321

Instantiated once for each connection to handle it.

1674

2322

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

1675

2323

1676

2324

def handle(self):

1677

2325

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

1678

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

1679

str(self.client_address))

1680

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

1681

self.server.child_pipe.fileno())

1682

1683

session = (gnutls.connection

1684

.ClientSession(self.request,

1685

gnutls.connection

1686

.X509Credentials()))

1687

1688

# Note: gnutls.connection.X509Credentials is really a

1689

# generic GnuTLS certificate credentials object so long as

1690

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

1691

# here despite using OpenPGP certificates.

1692

1693

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

1694

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

1695

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

1696

# "+DHE-DSS"))

2326

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

2327

str(self.client_address))

2328

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

2329

2330

session = gnutls.ClientSession(self.request)

2331

2332

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

2333

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

2334

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

2335

# "+DHE-DSS"))

1697

2336

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

1698

2337

priority = self.server.gnutls_priority

1699

2338

if priority is None:

1700

2339

priority = "NORMAL"

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1704

2340

gnutls.priority_set_direct(session,

2341

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

2342

1705

2343

# Start communication using the Mandos protocol

1706

2344

# Get protocol number

1707

2345

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

1708

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

2346

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

1709

2347

try:

1710

2348

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

1711

2349

raise RuntimeError(line)

1712

2350

except (ValueError, IndexError, RuntimeError) as error:

1713

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

2351

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

1714

2352

return

1715

2353

1716

2354

# Start GnuTLS connection

1717

2355

try:

1718

2356

session.handshake()

1719

except gnutls.errors.GNUTLSError as error:

1720

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

2357

except gnutls.Error as error:

2358

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

1721

2359

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

1722

2360

# established. Just abandon the request.

1723

2361

return

1724

logger.debug("Handshake succeeded")

1725

2362

log.debug("Handshake succeeded")

2363

1726

2364

approval_required = False

1727

2365

try:

1728

try:

1729

fpr = self.fingerprint(self.peer_certificate

1730

(session))

1731

except (TypeError,

1732

gnutls.errors.GNUTLSError) as error:

1733

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

1734

return

1735

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

1736

1737

try:

1738

client = ProxyClient(child_pipe, fpr,

2366

if gnutls.has_rawpk:

2367

fpr = b""

2368

try:

2369

key_id = self.key_id(

2370

self.peer_certificate(session))

2371

except (TypeError, gnutls.Error) as error:

2372

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

2373

return

2374

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

2375

key_id.decode("utf-8",

2376

errors="replace"))

2377

2378

else:

2379

key_id = b""

2380

try:

2381

fpr = self.fingerprint(

2382

self.peer_certificate(session))

2383

except (TypeError, gnutls.Error) as error:

2384

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

2385

return

2386

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

2387

2388

try:

2389

client = ProxyClient(child_pipe, key_id, fpr,

1739

2390

self.client_address)

1740

2391

except KeyError:

1741

2392

return

1742

2393

1743

2394

if client.approval_delay:

1744

2395

delay = client.approval_delay

1745

2396

client.approvals_pending += 1

1746

2397

approval_required = True

1747

2398

1748

2399

while True:

1749

2400

if not client.enabled:

1750

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

1751

client.name)

2401

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

1752

2402

if self.server.use_dbus:

1753

2403

# Emit D-Bus signal

1754

2404

client.Rejected("Disabled")

1755

2405

return

1756

2406

1757

2407

if client.approved or not client.approval_delay:

1758

#We are approved or approval is disabled

2408

# We are approved or approval is disabled

1759

2409

break

1760

2410

elif client.approved is None:

1761

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

1762

client.name)

2411

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

2412

client.name)

1763

2413

if self.server.use_dbus:

1764

2414

# Emit D-Bus signal

1765

2415

client.NeedApproval(

1766

2416

client.approval_delay.total_seconds()

1767

2417

* 1000, client.approved_by_default)

1768

2418

else:

1769

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

1770

client.name)

2419

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

2420

client.name)

1771

2421

if self.server.use_dbus:

1772

2422

# Emit D-Bus signal

1773

2423

client.Rejected("Denied")

1774

2424

return

1775

1776

#wait until timeout or approved

2425

2426

# wait until timeout or approved

1777

2427

time = datetime.datetime.now()

1778

2428

client.changedstate.acquire()

1779

2429

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

1781

2431

time2 = datetime.datetime.now()

1782

2432

if (time2 - time) >= delay:

1783

2433

if not client.approved_by_default:

1784

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

1785

" waiting for approval",

1786

client.name)

2434

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

2435

" waiting for approval",

2436

client.name)

1787

2437

if self.server.use_dbus:

1788

2438

# Emit D-Bus signal

1789

2439

client.Rejected("Approval timed out")

1792

2442

break

1793

2443

else:

1794

2444

delay -= time2 - time

1795

1796

sent_size = 0

1797

while sent_size < len(client.secret):

1798

try:

1799

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

1800

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1803

return

1804

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

1805

sent, len(client.secret)

1806

- (sent_size + sent))

1807

sent_size += sent

1808

1809

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

2445

2446

try:

2447

session.send(client.secret)

2448

except gnutls.Error as error:

2449

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

2450

return

2451

2452

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

1810

2453

# bump the timeout using extended_timeout

1811

2454

client.bump_timeout(client.extended_timeout)

1812

2455

if self.server.use_dbus:

1813

2456

# Emit D-Bus signal

1814

2457

client.GotSecret()

1815

2458

1816

2459

finally:

1817

2460

if approval_required:

1818

2461

client.approvals_pending -= 1

1819

2462

try:

1820

2463

session.bye()

1821

except gnutls.errors.GNUTLSError as error:

1822

logger.warning("GnuTLS bye failed",

1823

exc_info=error)

1824

2464

except gnutls.Error as error:

2465

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

2466

1825

2467

@staticmethod

1826

2468

def peer_certificate(session):

1827

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

1828

# If not an OpenPGP certificate...

1829

if (gnutls.library.functions

1830

.gnutls_certificate_type_get(session._c_object)

1831

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1832

# ...do the normal thing

1833

return session.peer_certificate

2469

"Return the peer's certificate as a bytestring"

2470

try:

2471

cert_type = gnutls.certificate_type_get2(

2472

session, gnutls.CTYPE_PEERS)

2473

except AttributeError:

2474

cert_type = gnutls.certificate_type_get(session)

2475

if gnutls.has_rawpk:

2476

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2477

else:

2478

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2479

# If not a valid certificate type...

2480

if cert_type not in valid_cert_types:

2481

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

2482

valid_cert_types)

2483

# ...return invalid data

2484

return b""

1834

2485

list_size = ctypes.c_uint(1)

1835

cert_list = (gnutls.library.functions

1836

.gnutls_certificate_get_peers

1837

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

2486

cert_list = (gnutls.certificate_get_peers

2487

(session, ctypes.byref(list_size)))

1838

2488

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

1839

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

1840

" certificate")

2489

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

1841

2490

if list_size.value == 0:

1842

2491

return None

1843

2492

cert = cert_list[0]

1844

2493

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

1845

2494

2495

@staticmethod

2496

def key_id(certificate):

2497

"Convert a certificate bytestring to a hexdigit key ID"

2498

# New GnuTLS "datum" with the public key

2499

datum = gnutls.datum_t(

2500

ctypes.cast(ctypes.c_char_p(certificate),

2501

ctypes.POINTER(ctypes.c_ubyte)),

2502

ctypes.c_uint(len(certificate)))

2503

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

2504

# New empty GnuTLS certificate

2505

pubkey = gnutls.pubkey_t()

2506

gnutls.pubkey_init(ctypes.byref(pubkey))

2507

# Import the raw public key into the certificate

2508

gnutls.pubkey_import(pubkey,

2509

ctypes.byref(datum),

2510

gnutls.X509_FMT_DER)

2511

# New buffer for the key ID

2512

buf = ctypes.create_string_buffer(32)

2513

buf_len = ctypes.c_size_t(len(buf))

2514

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

2515

gnutls.pubkey_get_key_id(

2516

pubkey,

2517

gnutls.KEYID_USE_SHA256,

2518

ctypes.cast(ctypes.byref(buf),

2519

ctypes.POINTER(ctypes.c_ubyte)),

2520

ctypes.byref(buf_len))

2521

# Deinit the certificate

2522

gnutls.pubkey_deinit(pubkey)

2523

2524

# Convert the buffer to a Python bytestring

2525

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

2526

# Convert the bytestring to hexadecimal notation

2527

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

2528

return hex_key_id

2529

1846

2530

@staticmethod

1847

2531

def fingerprint(openpgp):

1848

2532

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1849

2533

# New GnuTLS "datum" with the OpenPGP public key

1850

datum = (gnutls.library.types

1851

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

1852

ctypes.POINTER

1853

(ctypes.c_ubyte)),

1854

ctypes.c_uint(len(openpgp))))

2534

datum = gnutls.datum_t(

2535

ctypes.cast(ctypes.c_char_p(openpgp),

2536

ctypes.POINTER(ctypes.c_ubyte)),

2537

ctypes.c_uint(len(openpgp)))

1855

2538

# New empty GnuTLS certificate

1856

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2539

crt = gnutls.openpgp_crt_t()

2540

gnutls.openpgp_crt_init(ctypes.byref(crt))

1859

2541

# Import the OpenPGP public key into the certificate

1860

(gnutls.library.functions

1861

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

1862

gnutls.library.constants

1863

.GNUTLS_OPENPGP_FMT_RAW))

2542

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

2543

gnutls.OPENPGP_FMT_RAW)

1864

2544

# Verify the self signature in the key

1865

2545

crtverify = ctypes.c_uint()

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

2546

gnutls.openpgp_crt_verify_self(crt, 0,

2547

ctypes.byref(crtverify))

1869

2548

if crtverify.value != 0:

1870

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

2549

gnutls.openpgp_crt_deinit(crt)

2550

raise gnutls.CertificateSecurityError(code

2551

=crtverify.value)

1873

2552

# New buffer for the fingerprint

1874

2553

buf = ctypes.create_string_buffer(20)

1875

2554

buf_len = ctypes.c_size_t()

1876

2555

# Get the fingerprint from the certificate into the buffer

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

2556

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

2557

ctypes.byref(buf_len))

1880

2558

# Deinit the certificate

1881

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2559

gnutls.openpgp_crt_deinit(crt)

1882

2560

# Convert the buffer to a Python bytestring

1883

2561

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

1884

2562

# Convert the bytestring to hexadecimal notation

1886

2564

return hex_fpr

1887

2565

1888

2566

1889

class MultiprocessingMixIn(object):

2567

class MultiprocessingMixIn:

1890

2568

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

2569

1891

2570

def sub_process_main(self, request, address):

1892

2571

try:

1893

2572

self.finish_request(request, address)

1894

2573

except Exception:

1895

2574

self.handle_error(request, address)

1896

2575

self.close_request(request)

1897

2576

1898

2577

def process_request(self, request, address):

1899

2578

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

1900

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

1901

args = (request, address))

2579

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

2580

args=(request, address))

1902

2581

proc.start()

1903

2582

return proc

1904

2583

1905

2584

1906

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2585

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1907

2586

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

2587

1908

2588

def process_request(self, request, client_address):

1909

2589

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

1910

2590

1911

2591

This function creates a new pipe in self.pipe

1912

2592

"""

1913

2593

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1914

2594

1915

2595

proc = MultiprocessingMixIn.process_request(self, request,

1916

2596

client_address)

1917

2597

self.child_pipe.close()

1918

2598

self.add_pipe(parent_pipe, proc)

1919

2599

1920

2600

def add_pipe(self, parent_pipe, proc):

1921

2601

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

1922

2602

raise NotImplementedError()

1923

2603

1924

2604

1925

2605

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1926

socketserver.TCPServer, object):

1927

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

1928

2606

socketserver.TCPServer):

2607

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

2608

1929

2609

Attributes:

1930

2610

enabled: Boolean; whether this server is activated yet

1931

2611

interface: None or a network interface name (string)

1932

2612

use_ipv6: Boolean; to use IPv6 or not

1933

2613

"""

2614

1934

2615

def __init__(self, server_address, RequestHandlerClass,

1935

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

2616

interface=None,

2617

use_ipv6=True,

2618

socketfd=None):

1936

2619

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

1937

2620

creating a new one with socket.socket().

1938

2621

"""

1944

2627

self.socketfd = socketfd

1945

2628

# Save the original socket.socket() function

1946

2629

self.socket_socket = socket.socket

2630

1947

2631

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

1948

#

2632

#

1949

2633

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

1950

2634

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

1951

2635

# patching socket.socket.)

1952

#

2636

#

1953

2637

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

1954

2638

@functools.wraps(socket.socket)

1955

2639

def socket_wrapper(*args, **kwargs):

1967

2651

# socket_wrapper(), if socketfd was set.

1968

2652

socketserver.TCPServer.__init__(self, server_address,

1969

2653

RequestHandlerClass)

1970

2654

1971

2655

def server_bind(self):

1972

2656

"""This overrides the normal server_bind() function

1973

2657

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

1974

2658

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

2659

global SO_BINDTODEVICE

1975

2660

if self.interface is not None:

1976

2661

if SO_BINDTODEVICE is None:

1977

logger.error("SO_BINDTODEVICE does not exist;"

1978

" cannot bind to interface %s",

1979

self.interface)

1980

else:

1981

try:

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1983

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1986

except socket.error as error:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1991

logger.error("SO_BINDTODEVICE not available;"

1992

" cannot bind to interface %s",

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1997

else:

1998

raise

2662

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

2663

# common enough.

2664

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

2665

SO_BINDTODEVICE = 25

2666

try:

2667

self.socket.setsockopt(

2668

socket.SOL_SOCKET, SO_BINDTODEVICE,

2669

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

2670

except socket.error as error:

2671

if error.errno == errno.EPERM:

2672

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

2673

self.interface)

2674

elif error.errno == errno.ENOPROTOOPT:

2675

log.error("SO_BINDTODEVICE not available; cannot"

2676

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

2677

elif error.errno == errno.ENODEV:

2678

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

2679

" bind", self.interface)

2680

else:

2681

raise

1999

2682

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

2000

2683

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

2684

if self.server_address[1]:

2685

self.allow_reuse_address = True

2001

2686

if not self.server_address[0]:

2002

2687

if self.address_family == socket.AF_INET6:

2003

any_address = "::" # in6addr_any

2688

any_address = "::" # in6addr_any

2004

2689

else:

2005

any_address = "0.0.0.0" # INADDR_ANY

2690

any_address = "0.0.0.0" # INADDR_ANY

2006

2691

self.server_address = (any_address,

2007

2692

self.server_address[1])

2008

2693

elif not self.server_address[1]:

2009

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

2010

0)

2694

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

2011

2695

# if self.interface:

2012

2696

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

2013

2697

# 0, # port

2019

2703

2020

2704

class MandosServer(IPv6_TCPServer):

2021

2705

"""Mandos server.

2022

2706

2023

2707

Attributes:

2024

2708

clients: set of Client objects

2025

2709

gnutls_priority GnuTLS priority string

2026

2710

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

2027

2028

Assumes a gobject.MainLoop event loop.

2711

2712

Assumes a GLib.MainLoop event loop.

2029

2713

"""

2714

2030

2715

def __init__(self, server_address, RequestHandlerClass,

2031

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

2032

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

2716

interface=None,

2717

use_ipv6=True,

2718

clients=None,

2719

gnutls_priority=None,

2720

use_dbus=True,

2721

socketfd=None):

2033

2722

self.enabled = False

2034

2723

self.clients = clients

2035

2724

if self.clients is None:

2038

2727

self.gnutls_priority = gnutls_priority

2039

2728

IPv6_TCPServer.__init__(self, server_address,

2040

2729

RequestHandlerClass,

2041

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

2730

interface=interface,

2731

use_ipv6=use_ipv6,

2732

socketfd=socketfd)

2733

2044

2734

def server_activate(self):

2045

2735

if self.enabled:

2046

2736

return socketserver.TCPServer.server_activate(self)

2047

2737

2048

2738

def enable(self):

2049

2739

self.enabled = True

2050

2740

2051

2741

def add_pipe(self, parent_pipe, proc):

2052

2742

# Call "handle_ipc" for both data and EOF events

2053

gobject.io_add_watch(parent_pipe.fileno(),

2054

gobject.IO_IN | gobject.IO_HUP,

2055

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2059

2060

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

2061

proc = None, client_object=None):

2743

GLib.io_add_watch(

2744

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

2745

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

2746

functools.partial(self.handle_ipc,

2747

parent_pipe=parent_pipe,

2748

proc=proc))

2749

2750

def handle_ipc(self, source, condition,

2751

parent_pipe=None,

2752

proc=None,

2753

client_object=None):

2062

2754

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

2063

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

2755

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

2064

2756

# Wait for other process to exit

2065

2757

proc.join()

2066

2758

return False

2067

2759

2068

2760

# Read a request from the child

2069

2761

request = parent_pipe.recv()

2070

2762

command = request[0]

2071

2072

if command == 'init':

2073

fpr = request[1]

2074

address = request[2]

2075

2076

for c in self.clients.itervalues():

2077

if c.fingerprint == fpr:

2763

2764

if command == "init":

2765

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

2766

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

2767

address = request[3]

2768

2769

for c in self.clients.values():

2770

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2771

"27AE41E4649B934CA495991B7852B855"):

2772

continue

2773

if key_id and c.key_id == key_id:

2774

client = c

2775

break

2776

if fpr and c.fingerprint == fpr:

2078

2777

client = c

2079

2778

break

2080

2779

else:

2081

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

2082

"dress: %s", fpr, address)

2780

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

2781

" %s", key_id or fpr, address)

2083

2782

if self.use_dbus:

2084

2783

# Emit D-Bus signal

2085

mandos_dbus_service.ClientNotFound(fpr,

2784

mandos_dbus_service.ClientNotFound(key_id or fpr,

2086

2785

address[0])

2087

2786

parent_pipe.send(False)

2088

2787

return False

2089

2090

gobject.io_add_watch(parent_pipe.fileno(),

2091

gobject.IO_IN | gobject.IO_HUP,

2092

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

2788

2789

GLib.io_add_watch(

2790

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

2791

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

2792

functools.partial(self.handle_ipc,

2793

parent_pipe=parent_pipe,

2794

proc=proc,

2795

client_object=client))

2098

2796

parent_pipe.send(True)

2099

2797

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

2100

2798

# same fileno

2101

2799

return False

2102

if command == 'funcall':

2800

if command == "funcall":

2103

2801

funcname = request[1]

2104

2802

args = request[2]

2105

2803

kwargs = request[3]

2106

2107

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

2804

2805

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

2108

2806

funcname)(*args,

2109

**kwargs)))

2110

2111

if command == 'getattr':

2807

**kwargs)))

2808

2809

if command == "getattr":

2112

2810

attrname = request[1]

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2811

if isinstance(client_object.__getattribute__(attrname),

2812

collections.abc.Callable):

2813

parent_pipe.send(("function", ))

2115

2814

else:

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2118

2119

if command == 'setattr':

2815

parent_pipe.send((

2816

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

2817

2818

if command == "setattr":

2120

2819

attrname = request[1]

2121

2820

value = request[2]

2122

2821

setattr(client_object, attrname, value)

2123

2822

2124

2823

return True

2125

2824

2126

2825

2127

2826

def rfc3339_duration_to_delta(duration):

2128

2827

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

2129

2130

>>> rfc3339_duration_to_delta("P7D")

2131

datetime.timedelta(7)

2132

>>> rfc3339_duration_to_delta("PT60S")

2133

datetime.timedelta(0, 60)

2134

>>> rfc3339_duration_to_delta("PT60M")

2135

datetime.timedelta(0, 3600)

2136

>>> rfc3339_duration_to_delta("PT24H")

2137

datetime.timedelta(1)

2138

>>> rfc3339_duration_to_delta("P1W")

2139

datetime.timedelta(7)

2140

>>> rfc3339_duration_to_delta("PT5M30S")

2141

datetime.timedelta(0, 330)

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

datetime.timedelta(1, 200)

2828

2829

>>> timedelta = datetime.timedelta

2830

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

2831

True

2832

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

2833

True

2834

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

2835

True

2836

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

2837

True

2838

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

2839

True

2840

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

2841

True

2842

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

2843

True

2844

>>> del timedelta

2144

2845

"""

2145

2846

2146

2847

# Parsing an RFC 3339 duration with regular expressions is not

2147

2848

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

2148

2849

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

2149

2850

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

2150

2851

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

2151

2852

# avoid excessive use of external libraries.

2152

2853

2153

2854

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2855

Token = collections.namedtuple("Token", (

2856

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

2857

# a "group" containing digits

2858

"value", # datetime.timedelta or None

2859

"followers")) # Tokens valid after this token

2163

2860

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

2164

2861

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

2165

2862

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

2166

2863

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

2167

2864

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2865

frozenset((token_end, )))

2169

2866

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

2170

2867

datetime.timedelta(minutes=1),

2171

2868

frozenset((token_second, token_end)))

2187

2884

frozenset((token_month, token_end)))

2188

2885

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

2189

2886

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2887

frozenset((token_end, )))

2191

2888

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

2192

2889

frozenset((token_year, token_month,

2193

2890

token_day, token_time,

2194

2891

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2892

# Define starting values:

2893

# Value so far

2894

value = datetime.timedelta()

2197

2895

found_token = None

2198

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

2199

s = duration # String left to parse

2896

# Following valid tokens

2897

followers = frozenset((token_duration, ))

2898

# String left to parse

2899

s = duration

2200

2900

# Loop until end token is found

2201

2901

while found_token is not token_end:

2202

2902

# Search for any currently valid tokens

2218

2918

break

2219

2919

else:

2220

2920

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2921

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

2922

.format(duration))

2222

2923

# End token found

2223

2924

return value

2224

2925

2225

2926

2226

2927

def string_to_delta(interval):

2227

2928

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

2228

2229

>>> string_to_delta('7d')

2230

datetime.timedelta(7)

2231

>>> string_to_delta('60s')

2232

datetime.timedelta(0, 60)

2233

>>> string_to_delta('60m')

2234

datetime.timedelta(0, 3600)

2235

>>> string_to_delta('24h')

2236

datetime.timedelta(1)

2237

>>> string_to_delta('1w')

2238

datetime.timedelta(7)

2239

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

2240

datetime.timedelta(0, 330)

2929

2930

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

2931

True

2932

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

2933

True

2934

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

2935

True

2936

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

2937

True

2938

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

2939

True

2940

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

2941

True

2241

2942

"""

2242

2943

2243

2944

try:

2244

2945

return rfc3339_duration_to_delta(interval)

2245

2946

except ValueError:

2246

2947

pass

2247

2948

2248

2949

timevalue = datetime.timedelta(0)

2249

2950

for s in interval.split():

2250

2951

try:

2261

2962

elif suffix == "w":

2262

2963

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

2263

2964

else:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2965

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

2266

2966

except IndexError as e:

2267

2967

raise ValueError(*(e.args))

2268

2968

timevalue += delta

2269

2969

return timevalue

2270

2970

2271

2971

2272

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

2972

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

2273

2973

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

2274

2974

2275

2975

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

2276

2976

if os.fork():

2277

2977

sys.exit()

2284

2984

# Close all standard open file descriptors

2285

2985

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

2286

2986

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

2287

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

2987

raise OSError(errno.ENODEV,

2988

"{} not a character device"

2288

2989

.format(os.devnull))

2289

2990

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

2290

2991

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

2294

2995

2295

2996

2296

2997

def main():

2297

2998

2298

2999

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

2299

3000

# Parsing of options, both command line and config file

2300

3001

2301

3002

parser = argparse.ArgumentParser()

2302

3003

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

2303

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

3004

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

2304

3005

help="show version number and exit")

2305

3006

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

2306

3007

help="Bind to interface IF")

2342

3043

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

2343

3044

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

2344

3045

default=None)

2345

3046

2346

3047

options = parser.parse_args()

2347

2348

if options.check:

2349

import doctest

2350

fail_count, test_count = doctest.testmod()

2351

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

2352

3048

2353

3049

# Default values for config file for server-global settings

2354

server_defaults = { "interface": "",

2355

"address": "",

2356

"port": "",

2357

"debug": "False",

2358

"priority":

2359

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

2360

"servicename": "Mandos",

2361

"use_dbus": "True",

2362

"use_ipv6": "True",

2363

"debuglevel": "",

2364

"restore": "True",

2365

"socket": "",

2366

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

2367

"foreground": "False",

2368

"zeroconf": "True",

2369

}

2370

3050

if gnutls.has_rawpk:

3051

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

3052

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

3053

else:

3054

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

3055

":+SIGN-DSA-SHA256")

3056

server_defaults = {"interface": "",

3057

"address": "",

3058

"port": "",

3059

"debug": "False",

3060

"priority": priority,

3061

"servicename": "Mandos",

3062

"use_dbus": "True",

3063

"use_ipv6": "True",

3064

"debuglevel": "",

3065

"restore": "True",

3066

"socket": "",

3067

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

3068

"foreground": "False",

3069

"zeroconf": "True",

3070

}

3071

del priority

3072

2371

3073

# Parse config file for server-global settings

2372

server_config = configparser.SafeConfigParser(server_defaults)

3074

server_config = configparser.ConfigParser(server_defaults)

2373

3075

del server_defaults

2374

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

2375

"mandos.conf"))

2376

# Convert the SafeConfigParser object to a dict

3076

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

3077

# Convert the ConfigParser object to a dict

2377

3078

server_settings = server_config.defaults()

2378

3079

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

2379

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

3080

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

3081

"foreground", "zeroconf"):

2380

3082

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

2381

3083

option)

2382

3084

if server_settings["port"]:

2392

3094

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

2393

3095

["socket"])

2394

3096

del server_config

2395

3097

2396

3098

# Override the settings from the config file with command line

2397

3099

# options, if set.

2398

3100

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

2399

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

2400

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

2401

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

3101

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

3102

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

3103

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

2402

3104

value = getattr(options, option)

2403

3105

if value is not None:

2404

3106

server_settings[option] = value

2416

3118

if server_settings["debug"]:

2417

3119

server_settings["foreground"] = True

2418

3120

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

2419

3121

2420

3122

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

2421

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2427

3123

3124

if (not server_settings["zeroconf"]

3125

and not (server_settings["port"]

3126

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

3127

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

3128

2428

3129

# For convenience

2429

3130

debug = server_settings["debug"]

2430

3131

debuglevel = server_settings["debuglevel"]

2434

3135

stored_state_file)

2435

3136

foreground = server_settings["foreground"]

2436

3137

zeroconf = server_settings["zeroconf"]

2437

3138

2438

3139

if debug:

2439

3140

initlogger(debug, logging.DEBUG)

2440

3141

else:

2443

3144

else:

2444

3145

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

2445

3146

initlogger(debug, level)

2446

3147

2447

3148

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

2448

syslogger.setFormatter(logging.Formatter

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

2453

3149

syslogger.setFormatter(

3150

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

3151

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

3152

server_settings["servicename"])))

3153

2454

3154

# Parse config file with clients

2455

client_config = configparser.SafeConfigParser(Client

2456

.client_defaults)

3155

client_config = configparser.ConfigParser(Client.client_defaults)

2457

3156

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

2458

3157

"clients.conf"))

2459

3158

2460

3159

global mandos_dbus_service

2461

3160

mandos_dbus_service = None

2462

3161

2463

3162

socketfd = None

2464

3163

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

2465

3164

socketfd = server_settings["socket"]

2466

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

2467

server_settings["port"]),

2468

ClientHandler,

2469

interface=(server_settings["interface"]

2470

or None),

2471

use_ipv6=use_ipv6,

2472

gnutls_priority=

2473

server_settings["priority"],

2474

use_dbus=use_dbus,

2475

socketfd=socketfd)

3165

tcp_server = MandosServer(

3166

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

3167

ClientHandler,

3168

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

3169

use_ipv6=use_ipv6,

3170

gnutls_priority=server_settings["priority"],

3171

use_dbus=use_dbus,

3172

socketfd=socketfd)

2476

3173

if not foreground:

2477

3174

pidfilename = "/run/mandos.pid"

2478

3175

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

2479

3176

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

2480

3177

pidfile = None

2481

3178

try:

2482

pidfile = open(pidfilename, "w")

3179

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

2483

3180

except IOError as e:

2484

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

2485

exc_info=e)

2486

2487

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

3181

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

3182

exc_info=e)

3183

3184

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

3185

("mandos", "mandos"),

3186

("nobody", "nogroup")):

2488

3187

try:

2489

3188

uid = pwd.getpwnam(name).pw_uid

2490

gid = pwd.getpwnam(name).pw_gid

3189

gid = pwd.getpwnam(group).pw_gid

2491

3190

break

2492

3191

except KeyError:

2493

3192

continue

2497

3196

try:

2498

3197

os.setgid(gid)

2499

3198

os.setuid(uid)

3199

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

2500

3200

except OSError as error:

3201

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

3202

os.strerror(error.errno))

2501

3203

if error.errno != errno.EPERM:

2502

3204

raise

2503

3205

2504

3206

if debug:

2505

3207

# Enable all possible GnuTLS debugging

2506

3208

2507

3209

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

2508

3210

# - GnuTLS manual

2509

gnutls.library.functions.gnutls_global_set_log_level(11)

2510

2511

@gnutls.library.types.gnutls_log_func

3211

gnutls.global_set_log_level(11)

3212

3213

@gnutls.log_func

2512

3214

def debug_gnutls(level, string):

2513

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

2514

2515

(gnutls.library.functions

2516

.gnutls_global_set_log_function(debug_gnutls))

2517

3215

log.debug("GnuTLS: %s",

3216

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

3217

3218

gnutls.global_set_log_function(debug_gnutls)

3219

2518

3220

# Redirect stdin so all checkers get /dev/null

2519

3221

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

2520

3222

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

2521

3223

if null > 2:

2522

3224

os.close(null)

2523

3225

2524

3226

# Need to fork before connecting to D-Bus

2525

3227

if not foreground:

2526

3228

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

2527

3229

daemon()

2528

2529

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

2530

# need to inform gobject that threads will be used.

2531

gobject.threads_init()

2532

3230

3231

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

3232

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

3233

# need to inform GLib that threads will be used.

3234

GLib.threads_init()

3235

2533

3236

global main_loop

2534

3237

# From the Avahi example code

2535

3238

DBusGMainLoop(set_as_default=True)

2536

main_loop = gobject.MainLoop()

3239

main_loop = GLib.MainLoop()

2537

3240

bus = dbus.SystemBus()

2538

3241

# End of Avahi example code

2539

3242

if use_dbus:

2540

3243

try:

2541

3244

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

2542

bus, do_not_queue=True)

2543

old_bus_name = (dbus.service.BusName

2544

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

2545

do_not_queue=True))

2546

except dbus.exceptions.NameExistsException as e:

2547

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

3245

bus,

3246

do_not_queue=True)

3247

old_bus_name = dbus.service.BusName(

3248

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

3249

do_not_queue=True)

3250

except dbus.exceptions.DBusException as e:

3251

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

2548

3252

use_dbus = False

2549

3253

server_settings["use_dbus"] = False

2550

3254

tcp_server.use_dbus = False

2551

3255

if zeroconf:

2552

3256

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

3257

service = AvahiServiceToSyslog(

3258

name=server_settings["servicename"],

3259

servicetype="_mandos._tcp",

3260

protocol=protocol,

3261

bus=bus)

2557

3262

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2561

3263

service.interface = if_nametoindex(

3264

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

3265

2562

3266

global multiprocessing_manager

2563

3267

multiprocessing_manager = multiprocessing.Manager()

2564

3268

2565

3269

client_class = Client

2566

3270

if use_dbus:

2567

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

2568

3271

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

3272

2569

3273

client_settings = Client.config_parser(client_config)

2570

3274

old_client_settings = {}

2571

3275

clients_data = {}

2572

3276

2573

3277

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

2574

3278

global wnull

2575

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

3279

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

2576

3280

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

2577

3281

# mode

2578

3282

if debug or not foreground:

2579

3283

wnull.close()

2580

3284

2581

3285

# Get client data and settings from last running state.

2582

3286

if server_settings["restore"]:

2583

3287

try:

2584

3288

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

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

3289

if sys.version_info.major == 2:

3290

clients_data, old_client_settings = pickle.load(

3291

stored_state)

3292

else:

3293

bytes_clients_data, bytes_old_client_settings = (

3294

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

3295

# Fix bytes to strings

3296

# clients_data

3297

# .keys()

3298

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

3299

if isinstance(key, bytes)

3300

else key): value

3301

for key, value in

3302

bytes_clients_data.items()}

3303

del bytes_clients_data

3304

for key in clients_data:

3305

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

3306

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

3307

for k, v in

3308

clients_data[key].items()}

3309

clients_data[key] = value

3310

# .client_structure

3311

value["client_structure"] = [

3312

(s.decode("utf-8")

3313

if isinstance(s, bytes)

3314

else s) for s in

3315

value["client_structure"]]

3316

# .name, .host, and .checker_command

3317

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

3318

if isinstance(value[k], bytes):

3319

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

3320

if "key_id" not in value:

3321

value["key_id"] = ""

3322

elif "fingerprint" not in value:

3323

value["fingerprint"] = ""

3324

# old_client_settings

3325

# .keys()

3326

old_client_settings = {

3327

(key.decode("utf-8")

3328

if isinstance(key, bytes)

3329

else key): value

3330

for key, value in

3331

bytes_old_client_settings.items()}

3332

del bytes_old_client_settings

3333

# .host and .checker_command

3334

for value in old_client_settings.values():

3335

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

3336

if isinstance(value[attribute], bytes):

3337

value[attribute] = (value[attribute]

3338

.decode("utf-8"))

2587

3339

os.remove(stored_state_path)

2588

3340

except IOError as e:

2589

3341

if e.errno == errno.ENOENT:

2590

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

2591

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

3342

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

3343

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

2592

3344

else:

2593

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

2594

exc_info=e)

3345

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

3346

exc_info=e)

2595

3347

raise

2596

3348

except EOFError as e:

2597

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

2598

"EOFError:", exc_info=e)

2599

3349

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

3350

exc_info=e)

3351

2600

3352

with PGPEngine() as pgp:

2601

3353

for client_name, client in clients_data.items():

2602

3354

# Skip removed clients

2603

3355

if client_name not in client_settings:

2604

3356

continue

2605

3357

2606

3358

# Decide which value to use after restoring saved state.

2607

3359

# We have three different values: Old config file,

2608

3360

# new config file, and saved state.

2613

3365

# For each value in new config, check if it

2614

3366

# differs from the old config value (Except for

2615

3367

# the "secret" attribute)

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

3368

if (name != "secret"

3369

and (value !=

3370

old_client_settings[client_name][name])):

2619

3371

client[name] = value

2620

3372

except KeyError:

2621

3373

pass

2622

3374

2623

3375

# Clients who has passed its expire date can still be

2624

# enabled if its last checker was successful. Clients

3376

# enabled if its last checker was successful. A Client

2625

3377

# whose checker succeeded before we stored its state is

2626

3378

# assumed to have successfully run all checkers during

2627

3379

# downtime.

2628

3380

if client["enabled"]:

2629

3381

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

2630

3382

if not client["last_checked_ok"]:

2631

logger.warning(

2632

"disabling client {} - Client never "

2633

"performed a successful checker"

2634

.format(client_name))

3383

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

3384

" never performed a successful"

3385

" checker", client_name)

2635

3386

client["enabled"] = False

2636

3387

elif client["last_checker_status"] != 0:

2637

logger.warning(

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

3388

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

3389

" last checker failed with error"

3390

" code %s", client_name,

3391

client["last_checker_status"])

2642

3392

client["enabled"] = False

2643

3393

else:

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

2647

logger.debug("Last checker succeeded,"

2648

" keeping {} enabled"

2649

.format(client_name))

3394

client["expires"] = (

3395

datetime.datetime.utcnow()

3396

+ client["timeout"])

3397

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

3398

" enabled", client_name)

2650

3399

try:

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

3400

client["secret"] = pgp.decrypt(

3401

client["encrypted_secret"],

3402

client_settings[client_name]["secret"])

2655

3403

except PGPError:

2656

3404

# If decryption fails, we use secret from new settings

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2661

3405

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

3406

client_name)

3407

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

3408

["secret"])

3409

2662

3410

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

2663

3411

for client_name in (set(old_client_settings)

2664

3412

- set(client_settings)):

2666

3414

for client_name in (set(client_settings)

2667

3415

- set(old_client_settings)):

2668

3416

clients_data[client_name] = client_settings[client_name]

2669

3417

2670

3418

# Create all client objects

2671

3419

for client_name, client in clients_data.items():

2672

3420

tcp_server.clients[client_name] = client_class(

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2675

3421

name=client_name,

3422

settings=client,

3423

server_settings=server_settings)

3424

2676

3425

if not tcp_server.clients:

2677

logger.warning("No clients defined")

2678

3426

log.warning("No clients defined")

3427

2679

3428

if not foreground:

2680

3429

if pidfile is not None:

3430

pid = os.getpid()

2681

3431

try:

2682

3432

with pidfile:

2683

pid = os.getpid()

2684

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

3433

print(pid, file=pidfile)

2685

3434

except IOError:

2686

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

2687

pidfilename, pid)

3435

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

3436

pidfilename, pid)

2688

3437

del pidfile

2689

3438

del pidfilename

2690

2691

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

2692

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

2693

3439

3440

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

3441

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3442

lambda: main_loop.quit() and False)

3443

2694

3444

if use_dbus:

2695

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

2696

"se.bsnet.fukt.Mandos"})

2697

class MandosDBusService(DBusObjectWithProperties):

3445

3446

@alternate_dbus_interfaces(

3447

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

3448

class MandosDBusService(DBusObjectWithObjectManager):

2698

3449

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

3450

2699

3451

def __init__(self):

2700

3452

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

3453

2701

3454

_interface = "se.recompile.Mandos"

2702

2703

@dbus_interface_annotations(_interface)

2704

def _foo(self):

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

2708

3455

2709

3456

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

2710

3457

def ClientAdded(self, objpath):

2711

3458

"D-Bus signal"

2712

3459

pass

2713

3460

2714

3461

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

2715

def ClientNotFound(self, fingerprint, address):

3462

def ClientNotFound(self, key_id, address):

2716

3463

"D-Bus signal"

2717

3464

pass

2718

3465

3466

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

3467

"true"})

2719

3468

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

2720

3469

def ClientRemoved(self, objpath, name):

2721

3470

"D-Bus signal"

2722

3471

pass

2723

3472

3473

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

3474

"true"})

2724

3475

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

2725

3476

def GetAllClients(self):

2726

3477

"D-Bus method"

2727

return dbus.Array(c.dbus_object_path

2728

for c in

2729

tcp_server.clients.itervalues())

2730

3478

return dbus.Array(c.dbus_object_path for c in

3479

tcp_server.clients.values())

3480

3481

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

3482

"true"})

2731

3483

@dbus.service.method(_interface,

2732

3484

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

2733

3485

def GetAllClientsWithProperties(self):

2734

3486

"D-Bus method"

2735

3487

return dbus.Dictionary(

2736

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

2737

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

3488

{c.dbus_object_path: c.GetAll(

3489

"se.recompile.Mandos.Client")

3490

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

2738

3491

signature="oa{sv}")

2739

3492

2740

3493

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

2741

3494

def RemoveClient(self, object_path):

2742

3495

"D-Bus method"

2743

for c in tcp_server.clients.itervalues():

3496

for c in tcp_server.clients.values():

2744

3497

if c.dbus_object_path == object_path:

2745

3498

del tcp_server.clients[c.name]

2746

3499

c.remove_from_connection()

2747

# Don't signal anything except ClientRemoved

3500

# Don't signal the disabling

2748

3501

c.disable(quiet=True)

2749

# Emit D-Bus signal

2750

self.ClientRemoved(object_path, c.name)

3502

# Emit D-Bus signal for removal

3503

self.client_removed_signal(c)

2751

3504

return

2752

3505

raise KeyError(object_path)

2753

3506

2754

3507

del _interface

2755

3508

3509

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3510

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

3511

def GetManagedObjects(self):

3512

"""D-Bus method"""

3513

return dbus.Dictionary(

3514

{client.dbus_object_path:

3515

dbus.Dictionary(

3516

{interface: client.GetAll(interface)

3517

for interface in

3518

client._get_all_interface_names()})

3519

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

3520

3521

def client_added_signal(self, client):

3522

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

3523

if use_dbus:

3524

# New standard signal

3525

self.InterfacesAdded(

3526

client.dbus_object_path,

3527

dbus.Dictionary(

3528

{interface: client.GetAll(interface)

3529

for interface in

3530

client._get_all_interface_names()}))

3531

# Old signal

3532

self.ClientAdded(client.dbus_object_path)

3533

3534

def client_removed_signal(self, client):

3535

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

3536

if use_dbus:

3537

# New standard signal

3538

self.InterfacesRemoved(

3539

client.dbus_object_path,

3540

client._get_all_interface_names())

3541

# Old signal

3542

self.ClientRemoved(client.dbus_object_path,

3543

client.name)

3544

2756

3545

mandos_dbus_service = MandosDBusService()

2757

3546

3547

# Save modules to variables to exempt the modules from being

3548

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

3549

mp = multiprocessing

3550

wn = wnull

3551

2758

3552

def cleanup():

2759

3553

"Cleanup function; run on exit"

2760

3554

if zeroconf:

2761

3555

service.cleanup()

2762

2763

multiprocessing.active_children()

2764

wnull.close()

3556

3557

mp.active_children()

3558

wn.close()

2765

3559

if not (tcp_server.clients or client_settings):

2766

3560

return

2767

3561

2768

3562

# Store client before exiting. Secrets are encrypted with key

2769

3563

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

2770

3564

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

2771

3565

clients = {}

2772

3566

with PGPEngine() as pgp:

2773

for client in tcp_server.clients.itervalues():

3567

for client in tcp_server.clients.values():

2774

3568

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

2775

3569

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

2776

3570

key)

2777

3571

client_dict = {}

2778

3572

2779

3573

# A list of attributes that can not be pickled

2780

3574

# + secret.

2781

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

2782

"checker", "server_settings" }

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

3575

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

3576

"checker", "server_settings"}

3577

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

3578

.Object):

2785

3579

exclude.add(name)

2786

3580

2787

3581

client_dict["encrypted_secret"] = (client

2788

3582

.encrypted_secret)

2789

3583

for attr in client.client_structure:

2790

3584

if attr not in exclude:

2791

3585

client_dict[attr] = getattr(client, attr)

2792

3586

2793

3587

clients[client.name] = client_dict

2794

3588

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

2795

3589

2796

3590

try:

2797

with (tempfile.NamedTemporaryFile

2798

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

2799

dir=os.path.dirname(stored_state_path),

2800

delete=False)) as stored_state:

2801

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

2802

tempname=stored_state.name

3591

with tempfile.NamedTemporaryFile(

3592

mode="wb",

3593

suffix=".pickle",

3594

prefix="clients-",

3595

dir=os.path.dirname(stored_state_path),

3596

delete=False) as stored_state:

3597

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

3598

protocol=2)

3599

tempname = stored_state.name

2803

3600

os.rename(tempname, stored_state_path)

2804

3601

except (IOError, OSError) as e:

2805

3602

if not debug:

2808

3605

except NameError:

2809

3606

pass

2810

3607

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

2811

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

2812

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

3608

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

3609

os.strerror(e.errno))

2813

3610

else:

2814

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

2815

exc_info=e)

3611

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

3612

exc_info=e)

2816

3613

raise

2817

3614

2818

3615

# Delete all clients, and settings from config

2819

3616

while tcp_server.clients:

2820

3617

name, client = tcp_server.clients.popitem()

2821

3618

if use_dbus:

2822

3619

client.remove_from_connection()

2823

# Don't signal anything except ClientRemoved

3620

# Don't signal the disabling

2824

3621

client.disable(quiet=True)

3622

# Emit D-Bus signal for removal

2825

3623

if use_dbus:

2826

# Emit D-Bus signal

2827

mandos_dbus_service.ClientRemoved(client

2828

.dbus_object_path,

2829

client.name)

3624

mandos_dbus_service.client_removed_signal(client)

2830

3625

client_settings.clear()

2831

3626

2832

3627

atexit.register(cleanup)

2833

2834

for client in tcp_server.clients.itervalues():

3628

3629

for client in tcp_server.clients.values():

2835

3630

if use_dbus:

2836

# Emit D-Bus signal

2837

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3631

# Emit D-Bus signal for adding

3632

mandos_dbus_service.client_added_signal(client)

2838

3633

# Need to initiate checking of clients

2839

3634

if client.enabled:

2840

client.init_checker()

2841

3635

client.init_checker(randomize_start=True)

3636

2842

3637

tcp_server.enable()

2843

3638

tcp_server.server_activate()

2844

3639

2845

3640

# Find out what port we got

2846

3641

if zeroconf:

2847

3642

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

2848

3643

if use_ipv6:

2849

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

2850

" flowinfo %d, scope_id %d",

2851

*tcp_server.socket.getsockname())

3644

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

3645

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

2852

3646

else: # IPv4

2853

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

2854

*tcp_server.socket.getsockname())

2855

2856

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

2857

3647

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

3648

*tcp_server.socket.getsockname())

3649

3650

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

3651

2858

3652

try:

2859

3653

if zeroconf:

2860

3654

# From the Avahi example code

2861

3655

try:

2862

3656

service.activate()

2863

3657

except dbus.exceptions.DBusException as error:

2864

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

3658

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

2865

3659

cleanup()

2866

3660

sys.exit(1)

2867

3661

# End of Avahi example code

2868

2869

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

2870

lambda *args, **kwargs:

2871

(tcp_server.handle_request

2872

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

2873

2874

logger.debug("Starting main loop")

3662

3663

GLib.io_add_watch(

3664

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

3665

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3666

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

3667

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

3668

3669

log.debug("Starting main loop")

2875

3670

main_loop.run()

2876

3671

except AvahiError as error:

2877

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

3672

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

2878

3673

cleanup()

2879

3674

sys.exit(1)

2880

3675

except KeyboardInterrupt:

2881

3676

if debug:

2882

3677

print("", file=sys.stderr)

2883

logger.debug("Server received KeyboardInterrupt")

2884

logger.debug("Server exiting")

3678

log.debug("Server received KeyboardInterrupt")

3679

log.debug("Server exiting")

2885

3680

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

2886

3681

cleanup()

2887

3682

2888

if __name__ == '__main__':

2889

main()

3683

3684

def parse_test_args():

3685

# type: () -> argparse.Namespace

3686

parser = argparse.ArgumentParser(add_help=False)

3687

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

3688

parser.add_argument("--prefix", )

3689

args, unknown_args = parser.parse_known_args()

3690

if args.check:

3691

# Remove test options from sys.argv

3692

sys.argv[1:] = unknown_args

3693

return args

3694

3695

# Add all tests from doctest strings

3696

def load_tests(loader, tests, none):

3697

import doctest

3698

tests.addTests(doctest.DocTestSuite())

3699

return tests

3700

3701

if __name__ == "__main__":

3702

options = parse_test_args()

3703

try:

3704

if options.check:

3705

extra_test_prefix = options.prefix

3706

if extra_test_prefix is not None:

3707

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

3708

.result.wasSuccessful()):

3709

sys.exit(1)

3710

class ExtraTestLoader(unittest.TestLoader):

3711

testMethodPrefix = extra_test_prefix

3712

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

3713

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

3714

else:

3715

unittest.main(argv=[""])

3716

else:

3717

main()

3718

finally:

3719

logging.shutdown()

3720

3721

# Local Variables:

3722

# run-tests:

3723

# (lambda (&optional extra)

3724

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

3725

# extra))

3726

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

3727

# (funcall remove-test-window)

3728

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

3729

# run-tests-in-test-buffer:

3730

# (lambda (dir &optional extra)

3731

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

3732

# (setq buffer-read-only nil

3733

# default-directory dir)

3734

# (erase-buffer)

3735

# (compilation-mode))

3736

# (let ((process-result

3737

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

3738

# (process-file-shell-command

3739

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

3740

# (and (numberp process-result)

3741

# (= process-result 0))))

3742

# get-command-line:

3743

# (lambda (&optional extra)

3744

# (let ((quoted-script

3745

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

3746

# (format

3747

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

3748

# quoted-script)))

3749

# get-script-name:

3750

# (lambda ()

3751

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

3752

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

3753

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

3754

# (buffer-file-name))))

3755

# remove-test-window:

3756

# (lambda ()

3757

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

3758

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

3759

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

3760

# (lambda ()

3761

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

3762

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

3763

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

3764

# (display-buffer-overriding-action

3765

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

3766

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

3767

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

3768

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

3769

# eval:

3770

# (progn

3771

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

3772

# (funcall run-tests t)))

3773

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

3774

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

3775

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

3776

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

3777

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

3778

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

3779

# End: