/mandos/trunk : revision 1218

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#!/usr/bin/python

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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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# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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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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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import unittest

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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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import GnuPGInterface

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

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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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 = "1.8.11"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/dev/log")))

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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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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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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(str("16s16x"),

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interface))

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interface_index = struct.unpack(str("I"),

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ifreq[16:20])[0]

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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pass

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class PGPEngine(object):

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class PGPEngine:

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet',

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'--no-use-agent'])

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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244

159

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def _cleanup(self):

160

246

if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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257

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def password_encode(self, password):

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

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

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return b"mandos" + binascii.hexlify(password)

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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

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

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return encoded

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def encrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

186

with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

271

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

280

stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

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

283

if proc.returncode != 0:

284

raise PGPError(err)

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return ciphertext

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286

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def decrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

196

with open(os.devnull, "w") as devnull:

197

try:

198

proc = self.gnupg.run(['--decrypt'],

199

create_fhs=['stdin', 'stdout'],

200

attach_fhs={'stderr': devnull})

201

with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

203

with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

206

except IOError as e:

207

raise PGPError(e)

208

self.gnupg.passphrase = None

288

passphrase = self.password_encode(password)

289

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

291

passfile.write(passphrase)

292

passfile.flush()

293

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

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'--passphrase-file',

295

passfile.name]

296

+ self.gnupgargs,

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

301

if proc.returncode != 0:

302

raise PGPError(err)

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return decrypted_plaintext

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305

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# 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

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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

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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

212

331

213

332

class AvahiError(Exception):

214

333

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

215

334

self.value = value

216

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

217

def __unicode__(self):

218

return unicode(repr(self.value))

335

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

336

**kwargs)

337

219

338

220

339

class AvahiServiceError(AvahiError):

221

340

pass

222

341

342

223

343

class AvahiGroupError(AvahiError):

224

344

pass

225

345

226

346

227

class AvahiService(object):

347

class AvahiService:

228

348

"""An Avahi (Zeroconf) service.

229

349

230

350

Attributes:

231

351

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

232

352

Used to optionally bind to the specified interface.

233

353

name: string; Example: 'Mandos'

234

354

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

235

See <http://www.dns-sd.org/ServiceTypes.html>

355

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

236

356

port: integer; what port to announce

237

357

TXT: list of strings; TXT record for the service

238

358

domain: string; Domain to publish on, default to .local if empty.

244

364

server: D-Bus Server

245

365

bus: dbus.SystemBus()

246

366

"""

247

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

248

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

249

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

250

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):

251

379

self.interface = interface

252

380

self.name = name

253

381

self.type = servicetype

262

390

self.server = None

263

391

self.bus = bus

264

392

self.entry_group_state_changed_match = None

265

def rename(self):

393

394

def rename(self, remove=True):

266

395

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

267

396

if self.rename_count >= self.max_renames:

268

397

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

269

398

" after %i retries, exiting.",

270

399

self.rename_count)

271

400

raise AvahiServiceError("Too many renames")

272

self.name = unicode(self.server

273

.GetAlternativeServiceName(self.name))

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

403

self.rename_count += 1

274

404

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

275

405

self.name)

276

self.remove()

406

if remove:

407

self.remove()

277

408

try:

278

409

self.add()

279

410

except dbus.exceptions.DBusException as error:

280

logger.critical("DBusException: %s", error)

281

self.cleanup()

282

os._exit(1)

283

self.rename_count += 1

411

if (error.get_dbus_name()

412

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

413

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

414

return self.rename(remove=False)

415

else:

416

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

417

self.cleanup()

418

os._exit(1)

419

284

420

def remove(self):

285

421

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

286

422

if self.entry_group_state_changed_match is not None:

288

424

self.entry_group_state_changed_match = None

289

425

if self.group is not None:

290

426

self.group.Reset()

427

291

428

def add(self):

292

429

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

293

430

self.remove()

310

447

dbus.UInt16(self.port),

311

448

avahi.string_array_to_txt_array(self.TXT))

312

449

self.group.Commit()

450

313

451

def entry_group_state_changed(self, state, error):

314

452

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

315

453

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

316

454

317

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

318

456

logger.debug("Zeroconf service established.")

319

457

elif state == avahi.ENTRY_GROUP_COLLISION:

321

459

self.rename()

322

460

elif state == avahi.ENTRY_GROUP_FAILURE:

323

461

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

324

unicode(error))

325

raise AvahiGroupError("State changed: %s"

326

% unicode(error))

462

str(error))

463

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

464

327

465

def cleanup(self):

328

466

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

329

467

if self.group is not None:

334

472

pass

335

473

self.group = None

336

474

self.remove()

475

337

476

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

338

477

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

339

478

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

340

bad_states = { avahi.SERVER_INVALID:

341

"Zeroconf server invalid",

342

avahi.SERVER_REGISTERING: None,

343

avahi.SERVER_COLLISION:

344

"Zeroconf server name collision",

345

avahi.SERVER_FAILURE:

346

"Zeroconf server failure" }

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

}

347

485

if state in bad_states:

348

486

if bad_states[state] is not None:

349

487

if error is None:

352

490

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

353

491

self.cleanup()

354

492

elif state == avahi.SERVER_RUNNING:

355

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

logger.info("Local Zeroconf service name"

499

" collision.")

500

return self.rename(remove=False)

501

else:

502

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

503

self.cleanup()

504

os._exit(1)

356

505

else:

357

506

if error is None:

358

507

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

359

508

else:

360

509

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

510

361

511

def activate(self):

362

512

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

363

513

if self.server is None:

367

517

follow_name_owner_changes=True),

368

518

avahi.DBUS_INTERFACE_SERVER)

369

519

self.server.connect_to_signal("StateChanged",

370

self.server_state_changed)

520

self.server_state_changed)

371

521

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

372

522

523

373

524

class AvahiServiceToSyslog(AvahiService):

374

def rename(self):

525

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

375

526

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

376

ret = AvahiService.rename(self)

377

syslogger.setFormatter(logging.Formatter

378

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

379

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

380

% self.name))

527

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

528

syslogger.setFormatter(logging.Formatter(

529

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

530

.format(self.name)))

381

531

return ret

382

532

383

def timedelta_to_milliseconds(td):

384

"Convert a datetime.timedelta() to milliseconds"

385

return ((td.days * 24 * 60 * 60 * 1000)

386

+ (td.seconds * 1000)

387

+ (td.microseconds // 1000))

388

389

class Client(object):

533

534

# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

537

538

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

539

if library is None:

540

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

541

_library = ctypes.cdll.LoadLibrary(library)

542

del library

543

544

# Unless otherwise indicated, the constants and types below are

545

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

546

547

# Constants

548

E_SUCCESS = 0

549

E_INTERRUPTED = -52

550

E_AGAIN = -28

551

CRT_OPENPGP = 2

552

CRT_RAWPK = 3

553

CLIENT = 2

554

SHUT_RDWR = 0

555

CRD_CERTIFICATE = 1

556

E_NO_CERTIFICATE_FOUND = -49

557

X509_FMT_DER = 0

558

NO_TICKETS = 1<<10

559

ENABLE_RAWPK = 1<<18

560

CTYPE_PEERS = 3

561

KEYID_USE_SHA256 = 1 # gnutls/x509.h

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

564

# Types

565

class session_int(ctypes.Structure):

566

_fields_ = []

567

session_t = ctypes.POINTER(session_int)

568

569

class certificate_credentials_st(ctypes.Structure):

570

_fields_ = []

571

certificate_credentials_t = ctypes.POINTER(

572

certificate_credentials_st)

573

certificate_type_t = ctypes.c_int

574

575

class datum_t(ctypes.Structure):

576

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

577

('size', ctypes.c_uint)]

578

579

class openpgp_crt_int(ctypes.Structure):

580

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

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

584

credentials_type_t = ctypes.c_int

585

transport_ptr_t = ctypes.c_void_p

586

close_request_t = ctypes.c_int

587

588

# Exceptions

589

class Error(Exception):

590

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

591

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

592

# code is passed, convert it to a string with

593

# gnutls.strerror()

594

self.code = code

595

if message is None and code is not None:

596

message = gnutls.strerror(code)

597

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

598

message, *args)

599

600

class CertificateSecurityError(Error):

601

pass

602

603

# Classes

604

class Credentials:

605

def __init__(self):

606

self._c_object = gnutls.certificate_credentials_t()

607

gnutls.certificate_allocate_credentials(

608

ctypes.byref(self._c_object))

609

self.type = gnutls.CRD_CERTIFICATE

610

611

def __del__(self):

612

gnutls.certificate_free_credentials(self._c_object)

613

614

class ClientSession:

615

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

616

self._c_object = gnutls.session_t()

617

gnutls_flags = gnutls.CLIENT

618

if gnutls.check_version(b"3.5.6"):

619

gnutls_flags |= gnutls.NO_TICKETS

620

if gnutls.has_rawpk:

621

gnutls_flags |= gnutls.ENABLE_RAWPK

622

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

623

del gnutls_flags

624

gnutls.set_default_priority(self._c_object)

625

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

626

gnutls.handshake_set_private_extensions(self._c_object,

627

True)

628

self.socket = socket

629

if credentials is None:

630

credentials = gnutls.Credentials()

631

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

632

ctypes.cast(credentials._c_object,

633

ctypes.c_void_p))

634

self.credentials = credentials

635

636

def __del__(self):

637

gnutls.deinit(self._c_object)

638

639

def handshake(self):

640

return gnutls.handshake(self._c_object)

641

642

def send(self, data):

643

data = bytes(data)

644

data_len = len(data)

645

while data_len > 0:

646

data_len -= gnutls.record_send(self._c_object,

647

data[-data_len:],

648

data_len)

649

650

def bye(self):

651

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

652

653

# Error handling functions

654

def _error_code(result):

655

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

656

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

657

if result >= 0:

658

return result

659

if result == gnutls.E_NO_CERTIFICATE_FOUND:

660

raise gnutls.CertificateSecurityError(code=result)

661

raise gnutls.Error(code=result)

662

663

def _retry_on_error(result, func, arguments):

664

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

665

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

666

while result < 0:

667

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

668

return _error_code(result)

669

result = func(*arguments)

670

return result

671

672

# Unless otherwise indicated, the function declarations below are

673

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

674

675

# Functions

676

priority_set_direct = _library.gnutls_priority_set_direct

677

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

678

ctypes.POINTER(ctypes.c_char_p)]

679

priority_set_direct.restype = _error_code

680

681

init = _library.gnutls_init

682

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

683

init.restype = _error_code

684

685

set_default_priority = _library.gnutls_set_default_priority

686

set_default_priority.argtypes = [session_t]

687

set_default_priority.restype = _error_code

688

689

record_send = _library.gnutls_record_send

690

record_send.argtypes = [session_t, ctypes.c_void_p,

691

ctypes.c_size_t]

692

record_send.restype = ctypes.c_ssize_t

693

record_send.errcheck = _retry_on_error

694

695

certificate_allocate_credentials = (

696

_library.gnutls_certificate_allocate_credentials)

697

certificate_allocate_credentials.argtypes = [

698

ctypes.POINTER(certificate_credentials_t)]

699

certificate_allocate_credentials.restype = _error_code

700

701

certificate_free_credentials = (

702

_library.gnutls_certificate_free_credentials)

703

certificate_free_credentials.argtypes = [

704

certificate_credentials_t]

705

certificate_free_credentials.restype = None

706

707

handshake_set_private_extensions = (

708

_library.gnutls_handshake_set_private_extensions)

709

handshake_set_private_extensions.argtypes = [session_t,

710

ctypes.c_int]

711

handshake_set_private_extensions.restype = None

712

713

credentials_set = _library.gnutls_credentials_set

714

credentials_set.argtypes = [session_t, credentials_type_t,

715

ctypes.c_void_p]

716

credentials_set.restype = _error_code

717

718

strerror = _library.gnutls_strerror

719

strerror.argtypes = [ctypes.c_int]

720

strerror.restype = ctypes.c_char_p

721

722

certificate_type_get = _library.gnutls_certificate_type_get

723

certificate_type_get.argtypes = [session_t]

724

certificate_type_get.restype = _error_code

725

726

certificate_get_peers = _library.gnutls_certificate_get_peers

727

certificate_get_peers.argtypes = [session_t,

728

ctypes.POINTER(ctypes.c_uint)]

729

certificate_get_peers.restype = ctypes.POINTER(datum_t)

730

731

global_set_log_level = _library.gnutls_global_set_log_level

732

global_set_log_level.argtypes = [ctypes.c_int]

733

global_set_log_level.restype = None

734

735

global_set_log_function = _library.gnutls_global_set_log_function

736

global_set_log_function.argtypes = [log_func]

737

global_set_log_function.restype = None

738

739

deinit = _library.gnutls_deinit

740

deinit.argtypes = [session_t]

741

deinit.restype = None

742

743

handshake = _library.gnutls_handshake

744

handshake.argtypes = [session_t]

745

handshake.restype = _error_code

746

handshake.errcheck = _retry_on_error

747

748

transport_set_ptr = _library.gnutls_transport_set_ptr

749

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

750

transport_set_ptr.restype = None

751

752

bye = _library.gnutls_bye

753

bye.argtypes = [session_t, close_request_t]

754

bye.restype = _error_code

755

bye.errcheck = _retry_on_error

756

757

check_version = _library.gnutls_check_version

758

check_version.argtypes = [ctypes.c_char_p]

759

check_version.restype = ctypes.c_char_p

760

761

_need_version = b"3.3.0"

762

if check_version(_need_version) is None:

763

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

764

.format(_need_version))

765

766

_tls_rawpk_version = b"3.6.6"

767

has_rawpk = bool(check_version(_tls_rawpk_version))

768

769

if has_rawpk:

770

# Types

771

class pubkey_st(ctypes.Structure):

772

_fields = []

773

pubkey_t = ctypes.POINTER(pubkey_st)

774

775

x509_crt_fmt_t = ctypes.c_int

776

777

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

778

pubkey_init = _library.gnutls_pubkey_init

779

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

780

pubkey_init.restype = _error_code

781

782

pubkey_import = _library.gnutls_pubkey_import

783

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

784

x509_crt_fmt_t]

785

pubkey_import.restype = _error_code

786

787

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

788

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

789

ctypes.POINTER(ctypes.c_ubyte),

790

ctypes.POINTER(ctypes.c_size_t)]

791

pubkey_get_key_id.restype = _error_code

792

793

pubkey_deinit = _library.gnutls_pubkey_deinit

794

pubkey_deinit.argtypes = [pubkey_t]

795

pubkey_deinit.restype = None

796

else:

797

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

798

799

openpgp_crt_init = _library.gnutls_openpgp_crt_init

800

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

801

openpgp_crt_init.restype = _error_code

802

803

openpgp_crt_import = _library.gnutls_openpgp_crt_import

804

openpgp_crt_import.argtypes = [openpgp_crt_t,

805

ctypes.POINTER(datum_t),

806

openpgp_crt_fmt_t]

807

openpgp_crt_import.restype = _error_code

808

809

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

810

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

811

ctypes.POINTER(ctypes.c_uint)]

812

openpgp_crt_verify_self.restype = _error_code

813

814

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

815

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

816

openpgp_crt_deinit.restype = None

817

818

openpgp_crt_get_fingerprint = (

819

_library.gnutls_openpgp_crt_get_fingerprint)

820

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

821

ctypes.c_void_p,

822

ctypes.POINTER(

823

ctypes.c_size_t)]

824

openpgp_crt_get_fingerprint.restype = _error_code

825

826

if check_version(b"3.6.4"):

827

certificate_type_get2 = _library.gnutls_certificate_type_get2

828

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

829

certificate_type_get2.restype = _error_code

830

831

# Remove non-public functions

832

del _error_code, _retry_on_error

833

834

835

def call_pipe(connection, # : multiprocessing.Connection

836

func, *args, **kwargs):

837

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

838

839

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

840

return value on the provided multiprocessing.Connection.

841

"""

842

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

843

connection.close()

844

845

846

class Client:

390

847

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

391

848

392

849

Attributes:

393

850

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

394

851

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

395

852

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

396

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

397

to see if the client lives.

398

'None' if no process is running.

399

checker_callback_tag: a gobject event source tag, or None

853

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

854

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

855

running.

856

checker_callback_tag: a GLib event source tag, or None

400

857

checker_command: string; External command which is run to check

401

858

if client lives. %() expansions are done at

402

859

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

403

860

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

404

checker_initiator_tag: a gobject event source tag, or None

861

checker_initiator_tag: a GLib event source tag, or None

405

862

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

406

863

client_structure: Object describing what attributes a client has

407

864

and is used for storing the client at exit

408

865

current_checker_command: string; current running checker_command

409

disable_initiator_tag: a gobject event source tag, or None

866

disable_initiator_tag: a GLib event source tag, or None

410

867

enabled: bool()

411

868

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

412

uniquely identify the client

869

uniquely identify an OpenPGP client

870

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

871

a client using raw public keys

413

872

host: string; available for use by the checker command

414

873

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

415

874

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

417

876

last_checker_status: integer between 0 and 255 reflecting exit

418

877

status of last checker. -1 reflects crashed

419

878

checker, -2 means no checker completed yet.

879

last_checker_signal: The signal which killed the last checker, if

880

last_checker_status is -1

420

881

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

421

882

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

422

883

D-Bus identifiers

427

888

runtime_expansions: Allowed attributes for runtime expansion.

428

889

expires: datetime.datetime(); time (UTC) when a client will be

429

890

disabled, or None

891

server_settings: The server_settings dict from main()

430

892

"""

431

893

432

894

runtime_expansions = ("approval_delay", "approval_duration",

433

"created", "enabled", "fingerprint",

434

"host", "interval", "last_checked_ok",

895

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

896

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

897

"last_approval_request", "last_checked_ok",

435

898

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

436

client_defaults = { "timeout": "5m",

437

"extended_timeout": "15m",

438

"interval": "2m",

439

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

440

"host": "",

441

"approval_delay": "0s",

442

"approval_duration": "1s",

443

"approved_by_default": "True",

444

"enabled": "True",

445

}

446

447

def timeout_milliseconds(self):

448

"Return the 'timeout' attribute in milliseconds"

449

return timedelta_to_milliseconds(self.timeout)

450

451

def extended_timeout_milliseconds(self):

452

"Return the 'extended_timeout' attribute in milliseconds"

453

return timedelta_to_milliseconds(self.extended_timeout)

454

455

def interval_milliseconds(self):

456

"Return the 'interval' attribute in milliseconds"

457

return timedelta_to_milliseconds(self.interval)

458

459

def approval_delay_milliseconds(self):

460

return timedelta_to_milliseconds(self.approval_delay)

899

client_defaults = {

900

"timeout": "PT5M",

901

"extended_timeout": "PT15M",

902

"interval": "PT2M",

903

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

904

"host": "",

905

"approval_delay": "PT0S",

906

"approval_duration": "PT1S",

907

"approved_by_default": "True",

908

"enabled": "True",

909

}

461

910

462

911

@staticmethod

463

912

def config_parser(config):

471

920

for client_name in config.sections():

472

921

section = dict(config.items(client_name))

473

922

client = settings[client_name] = {}

474

923

475

924

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

476

925

# Reformat values from string types to Python types

477

926

client["approved_by_default"] = config.getboolean(

478

927

client_name, "approved_by_default")

479

928

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

480

929

"enabled")

481

930

931

# Uppercase and remove spaces from key_id and fingerprint

932

# for later comparison purposes with return value from the

933

# key_id() and fingerprint() functions

934

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

935

.replace(" ", ""))

482

936

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

483

937

.replace(" ", ""))

484

938

if "secret" in section:

485

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

939

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

940

.encode("utf-8"),

941

"base64")

486

942

elif "secfile" in section:

487

943

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

488

944

(section["secfile"])),

489

945

"rb") as secfile:

490

946

client["secret"] = secfile.read()

491

947

else:

492

raise TypeError("No secret or secfile for section %s"

493

% section)

948

raise TypeError("No secret or secfile for section {}"

949

.format(section))

494

950

client["timeout"] = string_to_delta(section["timeout"])

495

951

client["extended_timeout"] = string_to_delta(

496

952

section["extended_timeout"])

503

959

client["last_approval_request"] = None

504

960

client["last_checked_ok"] = None

505

961

client["last_checker_status"] = -2

506

962

507

963

return settings

508

509

510

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

511

"""Note: the 'checker' key in 'config' sets the

512

'checker_command' attribute and *not* the 'checker'

513

attribute."""

964

965

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

514

966

self.name = name

967

if server_settings is None:

968

server_settings = {}

969

self.server_settings = server_settings

515

970

# adding all client settings

516

for setting, value in settings.iteritems():

971

for setting, value in settings.items():

517

972

setattr(self, setting, value)

518

973

519

974

if self.enabled:

520

975

if not hasattr(self, "last_enabled"):

521

976

self.last_enabled = datetime.datetime.utcnow()

525

980

else:

526

981

self.last_enabled = None

527

982

self.expires = None

528

983

529

984

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

530

# Uppercase and remove spaces from fingerprint for later

531

# comparison purposes with return value from the fingerprint()

532

# function

985

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

533

986

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

534

987

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

535

988

datetime.datetime.utcnow())

542

995

self.current_checker_command = None

543

996

self.approved = None

544

997

self.approvals_pending = 0

545

self.changedstate = (multiprocessing_manager

546

.Condition(multiprocessing_manager

547

.Lock()))

548

self.client_structure = [attr for attr in

549

self.__dict__.iterkeys()

998

self.changedstate = multiprocessing_manager.Condition(

999

multiprocessing_manager.Lock())

1000

self.client_structure = [attr

1001

for attr in self.__dict__.keys()

550

1002

if not attr.startswith("_")]

551

1003

self.client_structure.append("client_structure")

552

553

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

554

lambda obj:

555

isinstance(obj,

556

property)):

1004

1005

for name, t in inspect.getmembers(

1006

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

557

1007

if not name.startswith("_"):

558

1008

self.client_structure.append(name)

559

1009

560

1010

# Send notice to process children that client state has changed

561

1011

def send_changedstate(self):

562

1012

with self.changedstate:

563

1013

self.changedstate.notify_all()

564

1014

565

1015

def enable(self):

566

1016

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

567

1017

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

568

1018

# Already enabled

569

1019

return

570

self.send_changedstate()

571

1020

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

572

1021

self.enabled = True

573

1022

self.last_enabled = datetime.datetime.utcnow()

574

1023

self.init_checker()

575

1024

self.send_changedstate()

1025

576

1026

def disable(self, quiet=True):

577

1027

"""Disable this client."""

578

1028

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

579

1029

return False

580

1030

if not quiet:

581

self.send_changedstate()

582

if not quiet:

583

1031

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

584

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

585

gobject.source_remove(self.disable_initiator_tag)

1032

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

1033

GLib.source_remove(self.disable_initiator_tag)

586

1034

self.disable_initiator_tag = None

587

1035

self.expires = None

588

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

589

gobject.source_remove(self.checker_initiator_tag)

1036

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

1037

GLib.source_remove(self.checker_initiator_tag)

590

1038

self.checker_initiator_tag = None

591

1039

self.stop_checker()

592

1040

self.enabled = False

593

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

1041

if not quiet:

1042

self.send_changedstate()

1043

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

594

1044

return False

595

1045

596

1046

def __del__(self):

597

1047

self.disable()

598

1048

599

1049

def init_checker(self):

600

1050

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

601

1051

# and every interval from then on.

602

self.checker_initiator_tag = (gobject.timeout_add

603

(self.interval_milliseconds(),

604

self.start_checker))

1052

if self.checker_initiator_tag is not None:

1053

GLib.source_remove(self.checker_initiator_tag)

1054

self.checker_initiator_tag = GLib.timeout_add(

1055

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

1056

+ 1)),

1057

self.start_checker)

605

1058

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

606

self.disable_initiator_tag = (gobject.timeout_add

607

(self.timeout_milliseconds(),

608

self.disable))

1059

if self.disable_initiator_tag is not None:

1060

GLib.source_remove(self.disable_initiator_tag)

1061

self.disable_initiator_tag = GLib.timeout_add(

1062

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

609

1063

# Also start a new checker *right now*.

610

1064

self.start_checker()

611

612

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

1065

1066

def checker_callback(self, source, condition, connection,

1067

command):

613

1068

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

1069

# Read return code from connection (see call_pipe)

1070

returncode = connection.recv()

1071

connection.close()

1072

if self.checker is not None:

1073

self.checker.join()

614

1074

self.checker_callback_tag = None

615

1075

self.checker = None

616

if os.WIFEXITED(condition):

617

self.last_checker_status = os.WEXITSTATUS(condition)

1076

1077

if returncode >= 0:

1078

self.last_checker_status = returncode

1079

self.last_checker_signal = None

618

1080

if self.last_checker_status == 0:

619

1081

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

620

1082

vars(self))

621

1083

self.checked_ok()

622

1084

else:

623

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

624

vars(self))

1085

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

625

1086

else:

626

1087

self.last_checker_status = -1

1088

self.last_checker_signal = -returncode

627

1089

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

628

1090

vars(self))

629

1091

return False

1092

630

1093

def checked_ok(self):

631

1094

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

632

1095

self.last_checked_ok = datetime.datetime.utcnow()

633

1096

self.last_checker_status = 0

1097

self.last_checker_signal = None

634

1098

self.bump_timeout()

635

1099

636

1100

def bump_timeout(self, timeout=None):

637

1101

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

638

1102

if timeout is None:

639

1103

timeout = self.timeout

640

1104

if self.disable_initiator_tag is not None:

641

gobject.source_remove(self.disable_initiator_tag)

1105

GLib.source_remove(self.disable_initiator_tag)

1106

self.disable_initiator_tag = None

642

1107

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

643

self.disable_initiator_tag = (gobject.timeout_add

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

1108

self.disable_initiator_tag = GLib.timeout_add(

1109

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

646

1110

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

647

1111

648

1112

def need_approval(self):

649

1113

self.last_approval_request = datetime.datetime.utcnow()

650

1114

651

1115

def start_checker(self):

652

1116

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

653

1117

654

1118

If a checker already exists, leave it running and do

655

1119

nothing."""

656

1120

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

657

# did that, then if a checker (for some reason) started

658

# running slowly and taking more than 'interval' time, the

659

# client would inevitably timeout, since no checker would get

660

# a chance to run to completion. If we instead leave running

1121

# did that, and if a checker (for some reason) started running

1122

# slowly and taking more than 'interval' time, then the client

1123

# would inevitably timeout, since no checker would get a

1124

# chance to run to completion. If we instead leave running

661

1125

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

662

1126

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

663

1127

# should be.

664

665

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

666

try:

667

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

668

except (AttributeError, OSError) as error:

669

if (isinstance(error, OSError)

670

and error.errno != errno.ECHILD):

671

raise error

672

else:

673

if pid:

674

logger.warning("Checker was a zombie")

675

gobject.source_remove(self.checker_callback_tag)

676

self.checker_callback(pid, status,

677

self.current_checker_command)

1128

1129

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

1130

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

1131

self.checker.join()

1132

self.checker = None

678

1133

# Start a new checker if needed

679

1134

if self.checker is None:

1135

# Escape attributes for the shell

1136

escaped_attrs = {

1137

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

1138

for attr in self.runtime_expansions}

680

1139

try:

681

# In case checker_command has exactly one % operator

682

command = self.checker_command % self.host

683

except TypeError:

684

# Escape attributes for the shell

685

escaped_attrs = dict(

686

(attr,

687

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

688

errors=

689

'replace')))

690

for attr in

691

self.runtime_expansions)

692

693

try:

694

command = self.checker_command % escaped_attrs

695

except TypeError as error:

696

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

697

' %s', self.checker_command, error)

698

return True # Try again later

1140

command = self.checker_command % escaped_attrs

1141

except TypeError as error:

1142

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

1143

self.checker_command,

1144

exc_info=error)

1145

return True # Try again later

699

1146

self.current_checker_command = command

700

try:

701

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

702

command, self.name)

703

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

704

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

705

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

706

# always replaced by /dev/null.)

707

self.checker = subprocess.Popen(command,

708

close_fds=True,

709

shell=True, cwd="/")

710

self.checker_callback_tag = (gobject.child_watch_add

711

(self.checker.pid,

712

self.checker_callback,

713

data=command))

714

# The checker may have completed before the gobject

715

# watch was added. Check for this.

716

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

717

if pid:

718

gobject.source_remove(self.checker_callback_tag)

719

self.checker_callback(pid, status, command)

720

except OSError as error:

721

logger.error("Failed to start subprocess: %s",

722

error)

723

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

1147

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

1148

self.name)

1149

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

1150

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

1151

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

1152

# always replaced by /dev/null.)

1153

# The exception is when not debugging but nevertheless

1154

# running in the foreground; use the previously

1155

# created wnull.

1156

popen_args = {"close_fds": True,

1157

"shell": True,

1158

"cwd": "/"}

1159

if (not self.server_settings["debug"]

1160

and self.server_settings["foreground"]):

1161

popen_args.update({"stdout": wnull,

1162

"stderr": wnull})

1163

pipe = multiprocessing.Pipe(duplex=False)

1164

self.checker = multiprocessing.Process(

1165

target=call_pipe,

1166

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

1167

kwargs=popen_args)

1168

self.checker.start()

1169

self.checker_callback_tag = GLib.io_add_watch(

1170

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

1171

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1172

self.checker_callback, pipe[0], command)

1173

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

724

1174

return True

725

1175

726

1176

def stop_checker(self):

727

1177

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

728

1178

if self.checker_callback_tag:

729

gobject.source_remove(self.checker_callback_tag)

1179

GLib.source_remove(self.checker_callback_tag)

730

1180

self.checker_callback_tag = None

731

1181

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

732

1182

return

733

1183

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

734

try:

735

os.kill(self.checker.pid, signal.SIGTERM)

736

#time.sleep(0.5)

737

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

738

# os.kill(self.checker.pid, signal.SIGKILL)

739

except OSError as error:

740

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

741

raise

1184

self.checker.terminate()

742

1185

self.checker = None

743

1186

744

1187

745

def dbus_service_property(dbus_interface, signature="v",

746

access="readwrite", byte_arrays=False):

1188

def dbus_service_property(dbus_interface,

1189

signature="v",

1190

access="readwrite",

1191

byte_arrays=False):

747

1192

"""Decorators for marking methods of a DBusObjectWithProperties to

748

1193

become properties on the D-Bus.

749

1194

750

1195

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

751

1196

and with one argument by "Set".

752

1197

753

1198

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

754

1199

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

755

1200

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

758

1203

# "Set" method, so we fail early here:

759

1204

if byte_arrays and signature != "ay":

760

1205

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

761

" signature %r" % signature)

1206

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

1207

762

1208

def decorator(func):

763

1209

func._dbus_is_property = True

764

1210

func._dbus_interface = dbus_interface

767

1213

func._dbus_name = func.__name__

768

1214

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

769

1215

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

770

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1216

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

771

1217

return func

1218

772

1219

return decorator

773

1220

774

1221

775

1222

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

777

1223

"""Decorator for marking functions returning interface annotations

1224

778

1225

Usage:

779

1226

780

1227

@dbus_interface_annotations("org.example.Interface")

781

1228

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

782

1229

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

783

1230

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

784

1231

"false"}

785

1232

"""

1233

786

1234

def decorator(func):

787

1235

func._dbus_is_interface = True

788

1236

func._dbus_interface = dbus_interface

789

1237

func._dbus_name = dbus_interface

790

1238

return func

1239

1240

return decorator

1241

1242

1243

def dbus_annotations(annotations):

1244

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

1245

Usage:

1246

1247

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

1248

"org.freedesktop.DBus.Property."

1249

"EmitsChangedSignal": "false"})

1250

@dbus_service_property("org.example.Interface", signature="b",

1251

access="r")

1252

def Property_dbus_property(self):

1253

return dbus.Boolean(False)

1254

1255

See also the DBusObjectWithAnnotations class.

1256

"""

1257

1258

def decorator(func):

1259

func._dbus_annotations = annotations

1260

return func

1261

791

1262

return decorator

792

1263

793

1264

794

1265

class DBusPropertyException(dbus.exceptions.DBusException):

795

1266

"""A base class for D-Bus property-related exceptions

796

1267

"""

797

def __unicode__(self):

798

return unicode(str(self))

1268

pass

799

1269

800

1270

801

1271

class DBusPropertyAccessException(DBusPropertyException):

810

1280

pass

811

1281

812

1282

813

class DBusObjectWithProperties(dbus.service.Object):

814

"""A D-Bus object with properties.

815

816

Classes inheriting from this can use the dbus_service_property

817

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

818

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

1283

class DBusObjectWithAnnotations(dbus.service.Object):

1284

"""A D-Bus object with annotations.

1285

1286

Classes inheriting from this can use the dbus_annotations

1287

decorator to add annotations to methods or signals.

819

1288

"""

820

1289

821

1290

@staticmethod

822

1291

def _is_dbus_thing(thing):

823

1292

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

824

1293

825

1294

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

826

1295

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

827

1296

"""

828

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

1297

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

829

1298

False)

830

1299

831

1300

def _get_all_dbus_things(self, thing):

832

1301

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

833

1302

"""

834

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

1303

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

835

1304

athing.__get__(self))

836

1305

for cls in self.__class__.__mro__

837

1306

for name, athing in

838

inspect.getmembers(cls,

839

self._is_dbus_thing(thing)))

840

1307

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

1308

1309

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1310

out_signature="s",

1311

path_keyword='object_path',

1312

connection_keyword='connection')

1313

def Introspect(self, object_path, connection):

1314

"""Overloading of standard D-Bus method.

1315

1316

Inserts annotation tags on methods and signals.

1317

"""

1318

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

1319

connection)

1320

try:

1321

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

1322

1323

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

1324

# Add annotation tags

1325

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

1326

for tag in if_tag.getElementsByTagName(typ):

1327

annots = dict()

1328

for name, prop in (self.

1329

_get_all_dbus_things(typ)):

1330

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

1331

and prop._dbus_interface

1332

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

1333

annots.update(getattr(

1334

prop, "_dbus_annotations", {}))

1335

for name, value in annots.items():

1336

ann_tag = document.createElement(

1337

"annotation")

1338

ann_tag.setAttribute("name", name)

1339

ann_tag.setAttribute("value", value)

1340

tag.appendChild(ann_tag)

1341

# Add interface annotation tags

1342

for annotation, value in dict(

1343

itertools.chain.from_iterable(

1344

annotations().items()

1345

for name, annotations

1346

in self._get_all_dbus_things("interface")

1347

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

1348

)).items():

1349

ann_tag = document.createElement("annotation")

1350

ann_tag.setAttribute("name", annotation)

1351

ann_tag.setAttribute("value", value)

1352

if_tag.appendChild(ann_tag)

1353

# Fix argument name for the Introspect method itself

1354

if (if_tag.getAttribute("name")

1355

== dbus.INTROSPECTABLE_IFACE):

1356

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

1357

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

1358

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

1359

if (arg.getAttribute("direction")

1360

== "out"):

1361

arg.setAttribute("name",

1362

"xml_data")

1363

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

1364

document.unlink()

1365

except (AttributeError, xml.dom.DOMException,

1366

xml.parsers.expat.ExpatError) as error:

1367

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

1368

exc_info=error)

1369

return xmlstring

1370

1371

1372

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1373

"""A D-Bus object with properties.

1374

1375

Classes inheriting from this can use the dbus_service_property

1376

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

1377

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

1378

"""

1379

841

1380

def _get_dbus_property(self, interface_name, property_name):

842

1381

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

843

1382

property with the specified name and interface.

844

1383

"""

845

for cls in self.__class__.__mro__:

846

for name, value in (inspect.getmembers

847

(cls,

848

self._is_dbus_thing("property"))):

1384

for cls in self.__class__.__mro__:

1385

for name, value in inspect.getmembers(

1386

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

849

1387

if (value._dbus_name == property_name

850

1388

and value._dbus_interface == interface_name):

851

1389

return value.__get__(self)

852

1390

853

1391

# No such property

854

raise DBusPropertyNotFound(self.dbus_object_path + ":"

855

+ interface_name + "."

856

+ property_name)

857

858

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

1392

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

1393

self.dbus_object_path, interface_name, property_name))

1394

1395

@classmethod

1396

def _get_all_interface_names(cls):

1397

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

1398

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

1399

"_dbus_interface", None)

1400

for x in (inspect.getmro(cls))

1401

for attr in dir(x))

1402

if name is not None)

1403

1404

@dbus.service.method(dbus.PROPERTIES_IFACE,

1405

in_signature="ss",

859

1406

out_signature="v")

860

1407

def Get(self, interface_name, property_name):

861

1408

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

867

1414

if not hasattr(value, "variant_level"):

868

1415

return value

869

1416

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

870

1417

871

1418

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

872

1419

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

873

1420

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

879

1426

# The byte_arrays option is not supported yet on

880

1427

# signatures other than "ay".

881

1428

if prop._dbus_signature != "ay":

882

raise ValueError

883

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

884

for byte in value))

1429

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

1430

"'ay' signature {!r}"

1431

.format(prop._dbus_signature))

1432

value = dbus.ByteArray(bytes(value))

885

1433

prop(value)

886

887

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

1434

1435

@dbus.service.method(dbus.PROPERTIES_IFACE,

1436

in_signature="s",

888

1437

out_signature="a{sv}")

889

1438

def GetAll(self, interface_name):

890

1439

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

891

1440

standard.

892

1441

893

1442

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

894

1443

"""

895

1444

properties = {}

905

1454

if not hasattr(value, "variant_level"):

906

1455

properties[name] = value

907

1456

continue

908

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

909

value.variant_level+1)

1457

properties[name] = type(value)(

1458

value, variant_level=value.variant_level + 1)

910

1459

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

911

1460

1461

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

1462

def PropertiesChanged(self, interface_name, changed_properties,

1463

invalidated_properties):

1464

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

1465

standard.

1466

"""

1467

pass

1468

912

1469

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

913

1470

out_signature="s",

914

1471

path_keyword='object_path',

915

1472

connection_keyword='connection')

916

1473

def Introspect(self, object_path, connection):

917

1474

"""Overloading of standard D-Bus method.

918

1475

919

1476

Inserts property tags and interface annotation tags.

920

1477

"""

921

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

922

connection)

1478

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1479

object_path,

1480

connection)

923

1481

try:

924

1482

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

1483

925

1484

def make_tag(document, name, prop):

926

1485

e = document.createElement("property")

927

1486

e.setAttribute("name", name)

928

1487

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

929

1488

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

930

1489

return e

1490

931

1491

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

932

1492

# Add property tags

933

1493

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

936

1496

if prop._dbus_interface

937

1497

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

938

1498

if_tag.appendChild(tag)

939

# Add interface annotation tags

940

for annotation, value in dict(

941

itertools.chain(

942

*(annotations().iteritems()

943

for name, annotations in

944

self._get_all_dbus_things("interface")

945

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

946

))).iteritems():

947

attr_tag = document.createElement("annotation")

948

attr_tag.setAttribute("name", annotation)

949

attr_tag.setAttribute("value", value)

950

if_tag.appendChild(attr_tag)

1499

# Add annotation tags for properties

1500

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

1501

annots = dict()

1502

for name, prop in self._get_all_dbus_things(

1503

"property"):

1504

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

1505

and prop._dbus_interface

1506

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

1507

annots.update(getattr(

1508

prop, "_dbus_annotations", {}))

1509

for name, value in annots.items():

1510

ann_tag = document.createElement(

1511

"annotation")

1512

ann_tag.setAttribute("name", name)

1513

ann_tag.setAttribute("value", value)

1514

tag.appendChild(ann_tag)

951

1515

# Add the names to the return values for the

952

1516

# "org.freedesktop.DBus.Properties" methods

953

1517

if (if_tag.getAttribute("name")

968

1532

except (AttributeError, xml.dom.DOMException,

969

1533

xml.parsers.expat.ExpatError) as error:

970

1534

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

971

error)

972

return xmlstring

973

974

975

def datetime_to_dbus (dt, variant_level=0):

1535

exc_info=error)

1536

return xmlstring

1537

1538

1539

try:

1540

dbus.OBJECT_MANAGER_IFACE

1541

except AttributeError:

1542

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

1543

1544

1545

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1546

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

1547

1548

Classes inheriting from this exposes the standard

1549

GetManagedObjects call and the InterfacesAdded and

1550

InterfacesRemoved signals on the standard

1551

"org.freedesktop.DBus.ObjectManager" interface.

1552

1553

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

1554

manually.

1555

"""

1556

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1557

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

1558

def GetManagedObjects(self):

1559

"""This function must be overridden"""

1560

raise NotImplementedError()

1561

1562

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1563

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

1564

def InterfacesAdded(self, object_path, interfaces_and_properties):

1565

pass

1566

1567

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

1568

def InterfacesRemoved(self, object_path, interfaces):

1569

pass

1570

1571

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1572

out_signature="s",

1573

path_keyword='object_path',

1574

connection_keyword='connection')

1575

def Introspect(self, object_path, connection):

1576

"""Overloading of standard D-Bus method.

1577

1578

Override return argument name of GetManagedObjects to be

1579

"objpath_interfaces_and_properties"

1580

"""

1581

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1582

object_path,

1583

connection)

1584

try:

1585

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

1586

1587

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

1588

# Fix argument name for the GetManagedObjects method

1589

if (if_tag.getAttribute("name")

1590

== dbus.OBJECT_MANAGER_IFACE):

1591

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

1592

if (cn.getAttribute("name")

1593

== "GetManagedObjects"):

1594

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

1595

if (arg.getAttribute("direction")

1596

== "out"):

1597

arg.setAttribute(

1598

"name",

1599

"objpath_interfaces"

1600

"_and_properties")

1601

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

1602

document.unlink()

1603

except (AttributeError, xml.dom.DOMException,

1604

xml.parsers.expat.ExpatError) as error:

1605

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

1606

exc_info=error)

1607

return xmlstring

1608

1609

1610

def datetime_to_dbus(dt, variant_level=0):

976

1611

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

977

1612

if dt is None:

978

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

979

return dbus.String(dt.isoformat(),

980

variant_level=variant_level)

981

982

983

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

984

.__metaclass__):

985

"""Applied to an empty subclass of a D-Bus object, this metaclass

986

will add additional D-Bus attributes matching a certain pattern.

1613

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

1614

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

1615

1616

1617

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1618

"""A class decorator; applied to a subclass of

1619

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

1620

interface names according to the "alt_interface_names" mapping.

1621

Usage:

1622

1623

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

1624

"net.example.AlternateInterface"})

1625

class SampleDBusObject(dbus.service.Object):

1626

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

1627

def SampleDBusMethod():

1628

pass

1629

1630

The above "SampleDBusMethod" on "SampleDBusObject" will be

1631

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

1632

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

1633

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

1634

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

1635

1636

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

1637

(from DBusObjectWithProperties) and interfaces (from the

1638

dbus_interface_annotations decorator).

987

1639

"""

988

def __new__(mcs, name, bases, attr):

989

# Go through all the base classes which could have D-Bus

990

# methods, signals, or properties in them

991

old_interface_names = []

992

for base in (b for b in bases

993

if issubclass(b, dbus.service.Object)):

994

# Go though all attributes of the base class

995

for attrname, attribute in inspect.getmembers(base):

1640

1641

def wrapper(cls):

1642

for orig_interface_name, alt_interface_name in (

1643

alt_interface_names.items()):

1644

attr = {}

1645

interface_names = set()

1646

# Go though all attributes of the class

1647

for attrname, attribute in inspect.getmembers(cls):

996

1648

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

997

1649

# with the wrong interface name

998

1650

if (not hasattr(attribute, "_dbus_interface")

999

or not attribute._dbus_interface

1000

.startswith("se.recompile.Mandos")):

1651

or not attribute._dbus_interface.startswith(

1652

orig_interface_name)):

1001

1653

continue

1002

1654

# Create an alternate D-Bus interface name based on

1003

1655

# the current name

1004

alt_interface = (attribute._dbus_interface

1005

.replace("se.recompile.Mandos",

1006

"se.bsnet.fukt.Mandos"))

1007

if alt_interface != attribute._dbus_interface:

1008

old_interface_names.append(alt_interface)

1656

alt_interface = attribute._dbus_interface.replace(

1657

orig_interface_name, alt_interface_name)

1658

interface_names.add(alt_interface)

1009

1659

# Is this a D-Bus signal?

1010

1660

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

1011

# Extract the original non-method function by

1012

# black magic

1013

nonmethod_func = (dict(

1661

# Extract the original non-method undecorated

1662

# function by black magic

1663

if sys.version_info.major == 2:

1664

nonmethod_func = (dict(

1014

1665

zip(attribute.func_code.co_freevars,

1015

attribute.__closure__))["func"]

1016

.cell_contents)

1666

attribute.__closure__))

1667

["func"].cell_contents)

1668

else:

1669

nonmethod_func = (dict(

1670

zip(attribute.__code__.co_freevars,

1671

attribute.__closure__))

1672

["func"].cell_contents)

1017

1673

# Create a new, but exactly alike, function

1018

1674

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

1019

1675

# with the alternate D-Bus interface name

1020

new_function = (dbus.service.signal

1021

(alt_interface,

1022

attribute._dbus_signature)

1023

(types.FunctionType(

1024

nonmethod_func.func_code,

1025

nonmethod_func.func_globals,

1026

nonmethod_func.func_name,

1027

nonmethod_func.func_defaults,

1028

nonmethod_func.func_closure)))

1676

new_function = copy_function(nonmethod_func)

1677

new_function = (dbus.service.signal(

1678

alt_interface,

1679

attribute._dbus_signature)(new_function))

1680

# Copy annotations, if any

1681

try:

1682

new_function._dbus_annotations = dict(

1683

attribute._dbus_annotations)

1684

except AttributeError:

1685

pass

1686

1029

1687

# Define a creator of a function to call both the

1030

# old and new functions, so both the old and new

1031

# signals gets sent when the function is called

1688

# original and alternate functions, so both the

1689

# original and alternate signals gets sent when

1690

# the function is called

1032

1691

def fixscope(func1, func2):

1033

1692

"""This function is a scope container to pass

1034

1693

func1 and func2 to the "call_both" function

1035

1694

outside of its arguments"""

1695

1696

@functools.wraps(func2)

1036

1697

def call_both(*args, **kwargs):

1037

1698

"""This function will emit two D-Bus

1038

1699

signals by calling func1 and func2"""

1039

1700

func1(*args, **kwargs)

1040

1701

func2(*args, **kwargs)

1702

# Make wrapper function look like a D-Bus

1703

# signal

1704

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

1705

if name.startswith("_dbus_"):

1706

setattr(call_both, name, attr)

1707

1041

1708

return call_both

1042

1709

# Create the "call_both" function and add it to

1043

1710

# the class

1044

attr[attrname] = fixscope(attribute,

1045

new_function)

1711

attr[attrname] = fixscope(attribute, new_function)

1046

1712

# Is this a D-Bus method?

1047

1713

elif getattr(attribute, "_dbus_is_method", False):

1048

1714

# Create a new, but exactly alike, function

1049

1715

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

1050

1716

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

1051

1717

# to the class.

1052

attr[attrname] = (dbus.service.method

1053

(alt_interface,

1054

attribute._dbus_in_signature,

1055

attribute._dbus_out_signature)

1056

(types.FunctionType

1057

(attribute.func_code,

1058

attribute.func_globals,

1059

attribute.func_name,

1060

attribute.func_defaults,

1061

attribute.func_closure)))

1718

attr[attrname] = (

1719

dbus.service.method(

1720

alt_interface,

1721

attribute._dbus_in_signature,

1722

attribute._dbus_out_signature)

1723

(copy_function(attribute)))

1724

# Copy annotations, if any

1725

try:

1726

attr[attrname]._dbus_annotations = dict(

1727

attribute._dbus_annotations)

1728

except AttributeError:

1729

pass

1062

1730

# Is this a D-Bus property?

1063

1731

elif getattr(attribute, "_dbus_is_property", False):

1064

1732

# Create a new, but exactly alike, function

1065

1733

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

1066

1734

# property with the alternate D-Bus interface

1067

1735

# name. Add it to the class.

1068

attr[attrname] = (dbus_service_property

1069

(alt_interface,

1070

attribute._dbus_signature,

1071

attribute._dbus_access,

1072

attribute

1073

._dbus_get_args_options

1074

["byte_arrays"])

1075

(types.FunctionType

1076

(attribute.func_code,

1077

attribute.func_globals,

1078

attribute.func_name,

1079

attribute.func_defaults,

1080

attribute.func_closure)))

1736

attr[attrname] = (dbus_service_property(

1737

alt_interface, attribute._dbus_signature,

1738

attribute._dbus_access,

1739

attribute._dbus_get_args_options

1740

["byte_arrays"])

1741

(copy_function(attribute)))

1742

# Copy annotations, if any

1743

try:

1744

attr[attrname]._dbus_annotations = dict(

1745

attribute._dbus_annotations)

1746

except AttributeError:

1747

pass

1081

1748

# Is this a D-Bus interface?

1082

1749

elif getattr(attribute, "_dbus_is_interface", False):

1083

1750

# Create a new, but exactly alike, function

1084

1751

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

1085

1752

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

1086

1753

# to the class.

1087

attr[attrname] = (dbus_interface_annotations

1088

(alt_interface)

1089

(types.FunctionType

1090

(attribute.func_code,

1091

attribute.func_globals,

1092

attribute.func_name,

1093

attribute.func_defaults,

1094

attribute.func_closure)))

1095

# Deprecate all old interfaces

1096

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1097

for old_interface_name in old_interface_names:

1098

@dbus_interface_annotations(old_interface_name)

1099

def func(self):

1100

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

1101

# Find an unused name

1102

for aname in (basename.format(i) for i in

1103

itertools.count()):

1104

if aname not in attr:

1105

attr[aname] = func

1106

break

1107

return type.__new__(mcs, name, bases, attr)

1108

1109

1754

attr[attrname] = (

1755

dbus_interface_annotations(alt_interface)

1756

(copy_function(attribute)))

1757

if deprecate:

1758

# Deprecate all alternate interfaces

1759

iname = "_AlternateDBusNames_interface_annotation{}"

1760

for interface_name in interface_names:

1761

1762

@dbus_interface_annotations(interface_name)

1763

def func(self):

1764

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

1765

"true"}

1766

# Find an unused name

1767

for aname in (iname.format(i)

1768

for i in itertools.count()):

1769

if aname not in attr:

1770

attr[aname] = func

1771

break

1772

if interface_names:

1773

# Replace the class with a new subclass of it with

1774

# methods, signals, etc. as created above.

1775

if sys.version_info.major == 2:

1776

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

1777

(cls, ), attr)

1778

else:

1779

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

1780

(cls, ), attr)

1781

return cls

1782

1783

return wrapper

1784

1785

1786

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

1787

"se.bsnet.fukt.Mandos"})

1110

1788

class ClientDBus(Client, DBusObjectWithProperties):

1111

1789

"""A Client class using D-Bus

1112

1790

1113

1791

Attributes:

1114

1792

dbus_object_path: dbus.ObjectPath

1115

1793

bus: dbus.SystemBus()

1116

1794

"""

1117

1795

1118

1796

runtime_expansions = (Client.runtime_expansions

1119

+ ("dbus_object_path",))

1120

1797

+ ("dbus_object_path", ))

1798

1799

_interface = "se.recompile.Mandos.Client"

1800

1121

1801

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

1122

1123

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

1802

1803

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

1124

1804

self.bus = bus

1125

1805

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

1126

1806

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

1127

1807

# the D-Bus

1128

client_object_name = unicode(self.name).translate(

1808

client_object_name = str(self.name).translate(

1129

1809

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

1130

1810

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

1131

self.dbus_object_path = (dbus.ObjectPath

1132

("/clients/" + client_object_name))

1811

self.dbus_object_path = dbus.ObjectPath(

1812

"/clients/" + client_object_name)

1133

1813

DBusObjectWithProperties.__init__(self, self.bus,

1134

1814

self.dbus_object_path)

1135

1136

def notifychangeproperty(transform_func,

1137

dbus_name, type_func=lambda x: x,

1138

variant_level=1):

1815

1816

def notifychangeproperty(transform_func, dbus_name,

1817

type_func=lambda x: x,

1818

variant_level=1,

1819

invalidate_only=False,

1820

_interface=_interface):

1139

1821

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

1140

1822

its changes to DBus.

1141

1823

1142

1824

transform_fun: Function that takes a value and a variant_level

1143

1825

and transforms it to a D-Bus type.

1144

1826

dbus_name: D-Bus name of the variable

1146

1828

to the D-Bus. Default: no transform

1147

1829

variant_level: D-Bus variant level. Default: 1

1148

1830

"""

1149

attrname = "_{0}".format(dbus_name)

1831

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

1832

1150

1833

def setter(self, value):

1151

1834

if hasattr(self, "dbus_object_path"):

1152

1835

if (not hasattr(self, attrname) or

1153

1836

type_func(getattr(self, attrname, None))

1154

1837

!= type_func(value)):

1155

dbus_value = transform_func(type_func(value),

1156

variant_level

1157

=variant_level)

1158

self.PropertyChanged(dbus.String(dbus_name),

1159

dbus_value)

1838

if invalidate_only:

1839

self.PropertiesChanged(

1840

_interface, dbus.Dictionary(),

1841

dbus.Array((dbus_name, )))

1842

else:

1843

dbus_value = transform_func(

1844

type_func(value),

1845

variant_level=variant_level)

1846

self.PropertyChanged(dbus.String(dbus_name),

1847

dbus_value)

1848

self.PropertiesChanged(

1849

_interface,

1850

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

1851

dbus_value}),

1852

dbus.Array())

1160

1853

setattr(self, attrname, value)

1161

1854

1162

1855

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

1163

1164

1856

1165

1857

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1166

1858

approvals_pending = notifychangeproperty(dbus.Boolean,

1167

1859

"ApprovalPending",

1168

type_func = bool)

1860

type_func=bool)

1169

1861

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

1170

1862

last_enabled = notifychangeproperty(datetime_to_dbus,

1171

1863

"LastEnabled")

1172

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

1173

type_func = lambda checker:

1174

checker is not None)

1864

checker = notifychangeproperty(

1865

dbus.Boolean, "CheckerRunning",

1866

type_func=lambda checker: checker is not None)

1175

1867

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1176

1868

"LastCheckedOK")

1177

1869

last_checker_status = notifychangeproperty(dbus.Int16,

1180

1872

datetime_to_dbus, "LastApprovalRequest")

1181

1873

approved_by_default = notifychangeproperty(dbus.Boolean,

1182

1874

"ApprovedByDefault")

1183

approval_delay = notifychangeproperty(dbus.UInt64,

1184

"ApprovalDelay",

1185

type_func =

1186

timedelta_to_milliseconds)

1875

approval_delay = notifychangeproperty(

1876

dbus.UInt64, "ApprovalDelay",

1877

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

1187

1878

approval_duration = notifychangeproperty(

1188

1879

dbus.UInt64, "ApprovalDuration",

1189

type_func = timedelta_to_milliseconds)

1880

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

1190

1881

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

1191

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

1192

type_func =

1193

timedelta_to_milliseconds)

1882

timeout = notifychangeproperty(

1883

dbus.UInt64, "Timeout",

1884

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

1194

1885

extended_timeout = notifychangeproperty(

1195

1886

dbus.UInt64, "ExtendedTimeout",

1196

type_func = timedelta_to_milliseconds)

1197

interval = notifychangeproperty(dbus.UInt64,

1198

"Interval",

1199

type_func =

1200

timedelta_to_milliseconds)

1887

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

1888

interval = notifychangeproperty(

1889

dbus.UInt64, "Interval",

1890

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

1201

1891

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

1202

1892

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

1893

invalidate_only=True)

1894

1203

1895

del notifychangeproperty

1204

1896

1205

1897

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

1206

1898

try:

1207

1899

self.remove_from_connection()

1210

1902

if hasattr(DBusObjectWithProperties, "__del__"):

1211

1903

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

1212

1904

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

1213

1214

def checker_callback(self, pid, condition, command,

1215

*args, **kwargs):

1216

self.checker_callback_tag = None

1217

self.checker = None

1218

if os.WIFEXITED(condition):

1219

exitstatus = os.WEXITSTATUS(condition)

1905

1906

def checker_callback(self, source, condition,

1907

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

1908

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

1909

connection, command, *args,

1910

**kwargs)

1911

exitstatus = self.last_checker_status

1912

if exitstatus >= 0:

1220

1913

# Emit D-Bus signal

1221

1914

self.CheckerCompleted(dbus.Int16(exitstatus),

1222

dbus.Int64(condition),

1915

# This is specific to GNU libC

1916

dbus.Int64(exitstatus << 8),

1223

1917

dbus.String(command))

1224

1918

else:

1225

1919

# Emit D-Bus signal

1226

1920

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

1227

dbus.Int64(condition),

1921

dbus.Int64(

1922

# This is specific to GNU libC

1923

(exitstatus << 8)

1924

| self.last_checker_signal),

1228

1925

dbus.String(command))

1229

1230

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

1231

*args, **kwargs)

1232

1926

return ret

1927

1233

1928

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

1234

old_checker = self.checker

1235

if self.checker is not None:

1236

old_checker_pid = self.checker.pid

1237

else:

1238

old_checker_pid = None

1929

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

1239

1930

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

1240

1931

# Only if new checker process was started

1241

1932

if (self.checker is not None

1243

1934

# Emit D-Bus signal

1244

1935

self.CheckerStarted(self.current_checker_command)

1245

1936

return r

1246

1937

1247

1938

def _reset_approved(self):

1248

1939

self.approved = None

1249

1940

return False

1250

1941

1251

1942

def approve(self, value=True):

1252

self.send_changedstate()

1253

1943

self.approved = value

1254

gobject.timeout_add(timedelta_to_milliseconds

1255

(self.approval_duration),

1256

self._reset_approved)

1257

1258

1259

## D-Bus methods, signals & properties

1260

_interface = "se.recompile.Mandos.Client"

1261

1262

## Interfaces

1263

1264

@dbus_interface_annotations(_interface)

1265

def _foo(self):

1266

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

1267

"false"}

1268

1269

## Signals

1270

1944

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

1945

* 1000), self._reset_approved)

1946

self.send_changedstate()

1947

1948

# D-Bus methods, signals & properties

1949

1950

# Interfaces

1951

1952

# Signals

1953

1271

1954

# CheckerCompleted - signal

1272

1955

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

1273

1956

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

1274

1957

"D-Bus signal"

1275

1958

pass

1276

1959

1277

1960

# CheckerStarted - signal

1278

1961

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

1279

1962

def CheckerStarted(self, command):

1280

1963

"D-Bus signal"

1281

1964

pass

1282

1965

1283

1966

# PropertyChanged - signal

1967

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

1284

1968

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

1285

1969

def PropertyChanged(self, property, value):

1286

1970

"D-Bus signal"

1287

1971

pass

1288

1972

1289

1973

# GotSecret - signal

1290

1974

@dbus.service.signal(_interface)

1291

1975

def GotSecret(self):

1294

1978

server to mandos-client

1295

1979

"""

1296

1980

pass

1297

1981

1298

1982

# Rejected - signal

1299

1983

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

1300

1984

def Rejected(self, reason):

1301

1985

"D-Bus signal"

1302

1986

pass

1303

1987

1304

1988

# NeedApproval - signal

1305

1989

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

1306

1990

def NeedApproval(self, timeout, default):

1307

1991

"D-Bus signal"

1308

1992

return self.need_approval()

1309

1310

## Methods

1311

1993

1994

# Methods

1995

1312

1996

# Approve - method

1313

1997

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

1314

1998

def Approve(self, value):

1315

1999

self.approve(value)

1316

2000

1317

2001

# CheckedOK - method

1318

2002

@dbus.service.method(_interface)

1319

2003

def CheckedOK(self):

1320

2004

self.checked_ok()

1321

2005

1322

2006

# Enable - method

2007

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

1323

2008

@dbus.service.method(_interface)

1324

2009

def Enable(self):

1325

2010

"D-Bus method"

1326

2011

self.enable()

1327

2012

1328

2013

# StartChecker - method

2014

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

1329

2015

@dbus.service.method(_interface)

1330

2016

def StartChecker(self):

1331

2017

"D-Bus method"

1332

2018

self.start_checker()

1333

2019

1334

2020

# Disable - method

2021

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

1335

2022

@dbus.service.method(_interface)

1336

2023

def Disable(self):

1337

2024

"D-Bus method"

1338

2025

self.disable()

1339

2026

1340

2027

# StopChecker - method

2028

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

1341

2029

@dbus.service.method(_interface)

1342

2030

def StopChecker(self):

1343

2031

self.stop_checker()

1344

1345

## Properties

1346

2032

2033

# Properties

2034

1347

2035

# ApprovalPending - property

1348

2036

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

1349

2037

def ApprovalPending_dbus_property(self):

1350

2038

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

1351

2039

1352

2040

# ApprovedByDefault - property

1353

@dbus_service_property(_interface, signature="b",

2041

@dbus_service_property(_interface,

2042

signature="b",

1354

2043

access="readwrite")

1355

2044

def ApprovedByDefault_dbus_property(self, value=None):

1356

2045

if value is None: # get

1357

2046

return dbus.Boolean(self.approved_by_default)

1358

2047

self.approved_by_default = bool(value)

1359

2048

1360

2049

# ApprovalDelay - property

1361

@dbus_service_property(_interface, signature="t",

2050

@dbus_service_property(_interface,

2051

signature="t",

1362

2052

access="readwrite")

1363

2053

def ApprovalDelay_dbus_property(self, value=None):

1364

2054

if value is None: # get

1365

return dbus.UInt64(self.approval_delay_milliseconds())

2055

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

2056

* 1000)

1366

2057

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

1367

2058

1368

2059

# ApprovalDuration - property

1369

@dbus_service_property(_interface, signature="t",

2060

@dbus_service_property(_interface,

2061

signature="t",

1370

2062

access="readwrite")

1371

2063

def ApprovalDuration_dbus_property(self, value=None):

1372

2064

if value is None: # get

1373

return dbus.UInt64(timedelta_to_milliseconds(

1374

self.approval_duration))

2065

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

2066

* 1000)

1375

2067

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

1376

2068

1377

2069

# Name - property

2070

@dbus_annotations(

2071

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

1378

2072

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

1379

2073

def Name_dbus_property(self):

1380

2074

return dbus.String(self.name)

1381

2075

2076

# KeyID - property

2077

@dbus_annotations(

2078

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

2079

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

2080

def KeyID_dbus_property(self):

2081

return dbus.String(self.key_id)

2082

1382

2083

# Fingerprint - property

2084

@dbus_annotations(

2085

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

1383

2086

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

1384

2087

def Fingerprint_dbus_property(self):

1385

2088

return dbus.String(self.fingerprint)

1386

2089

1387

2090

# Host - property

1388

@dbus_service_property(_interface, signature="s",

2091

@dbus_service_property(_interface,

2092

signature="s",

1389

2093

access="readwrite")

1390

2094

def Host_dbus_property(self, value=None):

1391

2095

if value is None: # get

1392

2096

return dbus.String(self.host)

1393

self.host = unicode(value)

1394

2097

self.host = str(value)

2098

1395

2099

# Created - property

2100

@dbus_annotations(

2101

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

1396

2102

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

1397

2103

def Created_dbus_property(self):

1398

2104

return datetime_to_dbus(self.created)

1399

2105

1400

2106

# LastEnabled - property

1401

2107

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

1402

2108

def LastEnabled_dbus_property(self):

1403

2109

return datetime_to_dbus(self.last_enabled)

1404

2110

1405

2111

# Enabled - property

1406

@dbus_service_property(_interface, signature="b",

2112

@dbus_service_property(_interface,

2113

signature="b",

1407

2114

access="readwrite")

1408

2115

def Enabled_dbus_property(self, value=None):

1409

2116

if value is None: # get

1412

2119

self.enable()

1413

2120

else:

1414

2121

self.disable()

1415

2122

1416

2123

# LastCheckedOK - property

1417

@dbus_service_property(_interface, signature="s",

2124

@dbus_service_property(_interface,

2125

signature="s",

1418

2126

access="readwrite")

1419

2127

def LastCheckedOK_dbus_property(self, value=None):

1420

2128

if value is not None:

1421

2129

self.checked_ok()

1422

2130

return

1423

2131

return datetime_to_dbus(self.last_checked_ok)

1424

2132

1425

2133

# LastCheckerStatus - property

1426

@dbus_service_property(_interface, signature="n",

1427

access="read")

2134

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

1428

2135

def LastCheckerStatus_dbus_property(self):

1429

2136

return dbus.Int16(self.last_checker_status)

1430

2137

1431

2138

# Expires - property

1432

2139

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

1433

2140

def Expires_dbus_property(self):

1434

2141

return datetime_to_dbus(self.expires)

1435

2142

1436

2143

# LastApprovalRequest - property

1437

2144

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

1438

2145

def LastApprovalRequest_dbus_property(self):

1439

2146

return datetime_to_dbus(self.last_approval_request)

1440

2147

1441

2148

# Timeout - property

1442

@dbus_service_property(_interface, signature="t",

2149

@dbus_service_property(_interface,

2150

signature="t",

1443

2151

access="readwrite")

1444

2152

def Timeout_dbus_property(self, value=None):

1445

2153

if value is None: # get

1446

return dbus.UInt64(self.timeout_milliseconds())

2154

return dbus.UInt64(self.timeout.total_seconds() * 1000)

2155

old_timeout = self.timeout

1447

2156

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

1448

# Reschedule timeout

2157

# Reschedule disabling

1449

2158

if self.enabled:

1450

2159

now = datetime.datetime.utcnow()

1451

time_to_die = timedelta_to_milliseconds(

1452

(self.last_checked_ok + self.timeout) - now)

1453

if time_to_die <= 0:

2160

self.expires += self.timeout - old_timeout

2161

if self.expires <= now:

1454

2162

# The timeout has passed

1455

2163

self.disable()

1456

2164

else:

1457

self.expires = (now +

1458

datetime.timedelta(milliseconds =

1459

time_to_die))

1460

2165

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

1461

2166

is None):

1462

2167

return

1463

gobject.source_remove(self.disable_initiator_tag)

1464

self.disable_initiator_tag = (gobject.timeout_add

1465

(time_to_die,

1466

self.disable))

1467

2168

GLib.source_remove(self.disable_initiator_tag)

2169

self.disable_initiator_tag = GLib.timeout_add(

2170

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

2171

self.disable)

2172

1468

2173

# ExtendedTimeout - property

1469

@dbus_service_property(_interface, signature="t",

2174

@dbus_service_property(_interface,

2175

signature="t",

1470

2176

access="readwrite")

1471

2177

def ExtendedTimeout_dbus_property(self, value=None):

1472

2178

if value is None: # get

1473

return dbus.UInt64(self.extended_timeout_milliseconds())

2179

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

2180

* 1000)

1474

2181

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

1475

2182

1476

2183

# Interval - property

1477

@dbus_service_property(_interface, signature="t",

2184

@dbus_service_property(_interface,

2185

signature="t",

1478

2186

access="readwrite")

1479

2187

def Interval_dbus_property(self, value=None):

1480

2188

if value is None: # get

1481

return dbus.UInt64(self.interval_milliseconds())

2189

return dbus.UInt64(self.interval.total_seconds() * 1000)

1482

2190

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

1483

2191

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

1484

2192

return

1485

2193

if self.enabled:

1486

2194

# Reschedule checker run

1487

gobject.source_remove(self.checker_initiator_tag)

1488

self.checker_initiator_tag = (gobject.timeout_add

1489

(value, self.start_checker))

1490

self.start_checker() # Start one now, too

1491

2195

GLib.source_remove(self.checker_initiator_tag)

2196

self.checker_initiator_tag = GLib.timeout_add(

2197

value, self.start_checker)

2198

self.start_checker() # Start one now, too

2199

1492

2200

# Checker - property

1493

@dbus_service_property(_interface, signature="s",

2201

@dbus_service_property(_interface,

2202

signature="s",

1494

2203

access="readwrite")

1495

2204

def Checker_dbus_property(self, value=None):

1496

2205

if value is None: # get

1497

2206

return dbus.String(self.checker_command)

1498

self.checker_command = unicode(value)

1499

2207

self.checker_command = str(value)

2208

1500

2209

# CheckerRunning - property

1501

@dbus_service_property(_interface, signature="b",

2210

@dbus_service_property(_interface,

2211

signature="b",

1502

2212

access="readwrite")

1503

2213

def CheckerRunning_dbus_property(self, value=None):

1504

2214

if value is None: # get

1507

2217

self.start_checker()

1508

2218

else:

1509

2219

self.stop_checker()

1510

2220

1511

2221

# ObjectPath - property

2222

@dbus_annotations(

2223

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

2224

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

1512

2225

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

1513

2226

def ObjectPath_dbus_property(self):

1514

return self.dbus_object_path # is already a dbus.ObjectPath

1515

2227

return self.dbus_object_path # is already a dbus.ObjectPath

2228

1516

2229

# Secret = property

1517

@dbus_service_property(_interface, signature="ay",

1518

access="write", byte_arrays=True)

2230

@dbus_annotations(

2231

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

2232

"invalidates"})

2233

@dbus_service_property(_interface,

2234

signature="ay",

2235

access="write",

2236

byte_arrays=True)

1519

2237

def Secret_dbus_property(self, value):

1520

self.secret = str(value)

1521

2238

self.secret = bytes(value)

2239

1522

2240

del _interface

1523

2241

1524

2242

1525

class ProxyClient(object):

1526

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

2243

class ProxyClient:

2244

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

1527

2245

self._pipe = child_pipe

1528

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

2246

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

1529

2247

if not self._pipe.recv():

1530

raise KeyError()

1531

2248

raise KeyError(key_id or fpr)

2249

1532

2250

def __getattribute__(self, name):

1533

2251

if name == '_pipe':

1534

2252

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

1537

2255

if data[0] == 'data':

1538

2256

return data[1]

1539

2257

if data[0] == 'function':

2258

1540

2259

def func(*args, **kwargs):

1541

2260

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

1542

2261

return self._pipe.recv()[1]

2262

1543

2263

return func

1544

2264

1545

2265

def __setattr__(self, name, value):

1546

2266

if name == '_pipe':

1547

2267

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

1548

2268

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

1549

2269

1550

2270

1551

class ClientDBusTransitional(ClientDBus):

1552

__metaclass__ = AlternateDBusNamesMetaclass

1553

1554

1555

2271

class ClientHandler(socketserver.BaseRequestHandler, object):

1556

2272

"""A class to handle client connections.

1557

2273

1558

2274

Instantiated once for each connection to handle it.

1559

2275

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

1560

2276

1561

2277

def handle(self):

1562

2278

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

1563

2279

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

1564

unicode(self.client_address))

2280

str(self.client_address))

1565

2281

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

1566

2282

self.server.child_pipe.fileno())

1567

1568

session = (gnutls.connection

1569

.ClientSession(self.request,

1570

gnutls.connection

1571

.X509Credentials()))

1572

1573

# Note: gnutls.connection.X509Credentials is really a

1574

# generic GnuTLS certificate credentials object so long as

1575

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

1576

# here despite using OpenPGP certificates.

1577

1578

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

1579

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

1580

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

1581

# "+DHE-DSS"))

2283

2284

session = gnutls.ClientSession(self.request)

2285

2286

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

2287

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

2288

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

2289

# "+DHE-DSS"))

1582

2290

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

1583

2291

priority = self.server.gnutls_priority

1584

2292

if priority is None:

1585

2293

priority = "NORMAL"

1586

(gnutls.library.functions

1587

.gnutls_priority_set_direct(session._c_object,

1588

priority, None))

1589

2294

gnutls.priority_set_direct(session._c_object,

2295

priority.encode("utf-8"),

2296

None)

2297

1590

2298

# Start communication using the Mandos protocol

1591

2299

# Get protocol number

1592

2300

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

1593

2301

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

1594

2302

try:

1595

2303

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

1596

raise RuntimeError

2304

raise RuntimeError(line)

1597

2305

except (ValueError, IndexError, RuntimeError) as error:

1598

2306

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

1599

2307

return

1600

2308

1601

2309

# Start GnuTLS connection

1602

2310

try:

1603

2311

session.handshake()

1604

except gnutls.errors.GNUTLSError as error:

2312

except gnutls.Error as error:

1605

2313

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

1606

2314

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

1607

2315

# established. Just abandon the request.

1608

2316

return

1609

2317

logger.debug("Handshake succeeded")

1610

2318

1611

2319

approval_required = False

1612

2320

try:

1613

try:

1614

fpr = self.fingerprint(self.peer_certificate

1615

(session))

1616

except (TypeError,

1617

gnutls.errors.GNUTLSError) as error:

1618

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

1619

return

1620

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

1621

1622

try:

1623

client = ProxyClient(child_pipe, fpr,

2321

if gnutls.has_rawpk:

2322

fpr = b""

2323

try:

2324

key_id = self.key_id(

2325

self.peer_certificate(session))

2326

except (TypeError, gnutls.Error) as error:

2327

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

2328

return

2329

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

2330

2331

else:

2332

key_id = b""

2333

try:

2334

fpr = self.fingerprint(

2335

self.peer_certificate(session))

2336

except (TypeError, gnutls.Error) as error:

2337

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

2338

return

2339

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

2340

2341

try:

2342

client = ProxyClient(child_pipe, key_id, fpr,

1624

2343

self.client_address)

1625

2344

except KeyError:

1626

2345

return

1627

2346

1628

2347

if client.approval_delay:

1629

2348

delay = client.approval_delay

1630

2349

client.approvals_pending += 1

1631

2350

approval_required = True

1632

2351

1633

2352

while True:

1634

2353

if not client.enabled:

1635

2354

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

1636

client.name)

2355

client.name)

1637

2356

if self.server.use_dbus:

1638

2357

# Emit D-Bus signal

1639

2358

client.Rejected("Disabled")

1640

2359

return

1641

2360

1642

2361

if client.approved or not client.approval_delay:

1643

#We are approved or approval is disabled

2362

# We are approved or approval is disabled

1644

2363

break

1645

2364

elif client.approved is None:

1646

2365

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

1648

2367

if self.server.use_dbus:

1649

2368

# Emit D-Bus signal

1650

2369

client.NeedApproval(

1651

client.approval_delay_milliseconds(),

1652

client.approved_by_default)

2370

client.approval_delay.total_seconds()

2371

* 1000, client.approved_by_default)

1653

2372

else:

1654

2373

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

1655

2374

client.name)

1657

2376

# Emit D-Bus signal

1658

2377

client.Rejected("Denied")

1659

2378

return

1660

1661

#wait until timeout or approved

2379

2380

# wait until timeout or approved

1662

2381

time = datetime.datetime.now()

1663

2382

client.changedstate.acquire()

1664

(client.changedstate.wait

1665

(float(client.timedelta_to_milliseconds(delay)

1666

/ 1000)))

2383

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

1667

2384

client.changedstate.release()

1668

2385

time2 = datetime.datetime.now()

1669

2386

if (time2 - time) >= delay:

1679

2396

break

1680

2397

else:

1681

2398

delay -= time2 - time

1682

1683

sent_size = 0

1684

while sent_size < len(client.secret):

1685

try:

1686

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

1687

except gnutls.errors.GNUTLSError as error:

1688

logger.warning("gnutls send failed")

1689

return

1690

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

1691

sent, len(client.secret)

1692

- (sent_size + sent))

1693

sent_size += sent

1694

2399

2400

try:

2401

session.send(client.secret)

2402

except gnutls.Error as error:

2403

logger.warning("gnutls send failed",

2404

exc_info=error)

2405

return

2406

1695

2407

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

1696

2408

# bump the timeout using extended_timeout

1697

2409

client.bump_timeout(client.extended_timeout)

1698

2410

if self.server.use_dbus:

1699

2411

# Emit D-Bus signal

1700

2412

client.GotSecret()

1701

2413

1702

2414

finally:

1703

2415

if approval_required:

1704

2416

client.approvals_pending -= 1

1705

2417

try:

1706

2418

session.bye()

1707

except gnutls.errors.GNUTLSError as error:

1708

logger.warning("GnuTLS bye failed")

1709

2419

except gnutls.Error as error:

2420

logger.warning("GnuTLS bye failed",

2421

exc_info=error)

2422

1710

2423

@staticmethod

1711

2424

def peer_certificate(session):

1712

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

1713

# If not an OpenPGP certificate...

1714

if (gnutls.library.functions

1715

.gnutls_certificate_type_get(session._c_object)

1716

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1717

# ...do the normal thing

1718

return session.peer_certificate

2425

"Return the peer's certificate as a bytestring"

2426

try:

2427

cert_type = gnutls.certificate_type_get2(session._c_object,

2428

gnutls.CTYPE_PEERS)

2429

except AttributeError:

2430

cert_type = gnutls.certificate_type_get(session._c_object)

2431

if gnutls.has_rawpk:

2432

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2433

else:

2434

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2435

# If not a valid certificate type...

2436

if cert_type not in valid_cert_types:

2437

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

2438

valid_cert_types)

2439

# ...return invalid data

2440

return b""

1719

2441

list_size = ctypes.c_uint(1)

1720

cert_list = (gnutls.library.functions

1721

.gnutls_certificate_get_peers

2442

cert_list = (gnutls.certificate_get_peers

1722

2443

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

1723

2444

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

1724

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

1725

" certificate")

2445

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

1726

2446

if list_size.value == 0:

1727

2447

return None

1728

2448

cert = cert_list[0]

1729

2449

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

1730

2450

2451

@staticmethod

2452

def key_id(certificate):

2453

"Convert a certificate bytestring to a hexdigit key ID"

2454

# New GnuTLS "datum" with the public key

2455

datum = gnutls.datum_t(

2456

ctypes.cast(ctypes.c_char_p(certificate),

2457

ctypes.POINTER(ctypes.c_ubyte)),

2458

ctypes.c_uint(len(certificate)))

2459

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

2460

# New empty GnuTLS certificate

2461

pubkey = gnutls.pubkey_t()

2462

gnutls.pubkey_init(ctypes.byref(pubkey))

2463

# Import the raw public key into the certificate

2464

gnutls.pubkey_import(pubkey,

2465

ctypes.byref(datum),

2466

gnutls.X509_FMT_DER)

2467

# New buffer for the key ID

2468

buf = ctypes.create_string_buffer(32)

2469

buf_len = ctypes.c_size_t(len(buf))

2470

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

2471

gnutls.pubkey_get_key_id(pubkey,

2472

gnutls.KEYID_USE_SHA256,

2473

ctypes.cast(ctypes.byref(buf),

2474

ctypes.POINTER(ctypes.c_ubyte)),

2475

ctypes.byref(buf_len))

2476

# Deinit the certificate

2477

gnutls.pubkey_deinit(pubkey)

2478

2479

# Convert the buffer to a Python bytestring

2480

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

2481

# Convert the bytestring to hexadecimal notation

2482

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

2483

return hex_key_id

2484

1731

2485

@staticmethod

1732

2486

def fingerprint(openpgp):

1733

2487

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1734

2488

# New GnuTLS "datum" with the OpenPGP public key

1735

datum = (gnutls.library.types

1736

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

1737

ctypes.POINTER

1738

(ctypes.c_ubyte)),

1739

ctypes.c_uint(len(openpgp))))

2489

datum = gnutls.datum_t(

2490

ctypes.cast(ctypes.c_char_p(openpgp),

2491

ctypes.POINTER(ctypes.c_ubyte)),

2492

ctypes.c_uint(len(openpgp)))

1740

2493

# New empty GnuTLS certificate

1741

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1742

(gnutls.library.functions

1743

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2494

crt = gnutls.openpgp_crt_t()

2495

gnutls.openpgp_crt_init(ctypes.byref(crt))

1744

2496

# Import the OpenPGP public key into the certificate

1745

(gnutls.library.functions

1746

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

1747

gnutls.library.constants

1748

.GNUTLS_OPENPGP_FMT_RAW))

2497

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

2498

gnutls.OPENPGP_FMT_RAW)

1749

2499

# Verify the self signature in the key

1750

2500

crtverify = ctypes.c_uint()

1751

(gnutls.library.functions

1752

.gnutls_openpgp_crt_verify_self(crt, 0,

1753

ctypes.byref(crtverify)))

2501

gnutls.openpgp_crt_verify_self(crt, 0,

2502

ctypes.byref(crtverify))

1754

2503

if crtverify.value != 0:

1755

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1756

raise (gnutls.errors.CertificateSecurityError

1757

("Verify failed"))

2504

gnutls.openpgp_crt_deinit(crt)

2505

raise gnutls.CertificateSecurityError(code

2506

=crtverify.value)

1758

2507

# New buffer for the fingerprint

1759

2508

buf = ctypes.create_string_buffer(20)

1760

2509

buf_len = ctypes.c_size_t()

1761

2510

# Get the fingerprint from the certificate into the buffer

1762

(gnutls.library.functions

1763

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

1764

ctypes.byref(buf_len)))

2511

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

2512

ctypes.byref(buf_len))

1765

2513

# Deinit the certificate

1766

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2514

gnutls.openpgp_crt_deinit(crt)

1767

2515

# Convert the buffer to a Python bytestring

1768

2516

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

1769

2517

# Convert the bytestring to hexadecimal notation

1771

2519

return hex_fpr

1772

2520

1773

2521

1774

class MultiprocessingMixIn(object):

2522

class MultiprocessingMixIn:

1775

2523

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

2524

1776

2525

def sub_process_main(self, request, address):

1777

2526

try:

1778

2527

self.finish_request(request, address)

1779

2528

except Exception:

1780

2529

self.handle_error(request, address)

1781

2530

self.close_request(request)

1782

2531

1783

2532

def process_request(self, request, address):

1784

2533

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

1785

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

1786

args = (request,

1787

address))

2534

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

2535

args=(request, address))

1788

2536

proc.start()

1789

2537

return proc

1790

2538

1791

2539

1792

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2540

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1793

2541

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

2542

1794

2543

def process_request(self, request, client_address):

1795

2544

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

1796

2545

1797

2546

This function creates a new pipe in self.pipe

1798

2547

"""

1799

2548

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1800

2549

1801

2550

proc = MultiprocessingMixIn.process_request(self, request,

1802

2551

client_address)

1803

2552

self.child_pipe.close()

1804

2553

self.add_pipe(parent_pipe, proc)

1805

2554

1806

2555

def add_pipe(self, parent_pipe, proc):

1807

2556

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

1808

raise NotImplementedError

2557

raise NotImplementedError()

1809

2558

1810

2559

1811

2560

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1812

socketserver.TCPServer, object):

2561

socketserver.TCPServer):

1813

2562

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

1814

2563

1815

2564

Attributes:

1816

2565

enabled: Boolean; whether this server is activated yet

1817

2566

interface: None or a network interface name (string)

1818

2567

use_ipv6: Boolean; to use IPv6 or not

1819

2568

"""

2569

1820

2570

def __init__(self, server_address, RequestHandlerClass,

1821

interface=None, use_ipv6=True):

2571

interface=None,

2572

use_ipv6=True,

2573

socketfd=None):

2574

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

2575

creating a new one with socket.socket().

2576

"""

1822

2577

self.interface = interface

1823

2578

if use_ipv6:

1824

2579

self.address_family = socket.AF_INET6

2580

if socketfd is not None:

2581

# Save the file descriptor

2582

self.socketfd = socketfd

2583

# Save the original socket.socket() function

2584

self.socket_socket = socket.socket

2585

2586

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

2587

#

2588

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

2589

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

2590

# patching socket.socket.)

2591

#

2592

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

2593

@functools.wraps(socket.socket)

2594

def socket_wrapper(*args, **kwargs):

2595

# Restore original function so subsequent calls are

2596

# not affected.

2597

socket.socket = self.socket_socket

2598

del self.socket_socket

2599

# This time only, return a new socket object from the

2600

# saved file descriptor.

2601

return socket.fromfd(self.socketfd, *args, **kwargs)

2602

# Replace socket.socket() function with wrapper

2603

socket.socket = socket_wrapper

2604

# The socketserver.TCPServer.__init__ will call

2605

# socket.socket(), which might be our replacement,

2606

# socket_wrapper(), if socketfd was set.

1825

2607

socketserver.TCPServer.__init__(self, server_address,

1826

2608

RequestHandlerClass)

2609

1827

2610

def server_bind(self):

1828

2611

"""This overrides the normal server_bind() function

1829

2612

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

1830

2613

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

2614

global SO_BINDTODEVICE

1831

2615

if self.interface is not None:

1832

2616

if SO_BINDTODEVICE is None:

1833

logger.error("SO_BINDTODEVICE does not exist;"

1834

" cannot bind to interface %s",

1835

self.interface)

1836

else:

1837

try:

1838

self.socket.setsockopt(socket.SOL_SOCKET,

1839

SO_BINDTODEVICE,

1840

str(self.interface

1841

+ '\0'))

1842

except socket.error as error:

1843

if error[0] == errno.EPERM:

1844

logger.error("No permission to"

1845

" bind to interface %s",

1846

self.interface)

1847

elif error[0] == errno.ENOPROTOOPT:

1848

logger.error("SO_BINDTODEVICE not available;"

1849

" cannot bind to interface %s",

1850

self.interface)

1851

else:

1852

raise

2617

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

2618

# common enough.

2619

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

2620

SO_BINDTODEVICE = 25

2621

try:

2622

self.socket.setsockopt(

2623

socket.SOL_SOCKET, SO_BINDTODEVICE,

2624

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

2625

except socket.error as error:

2626

if error.errno == errno.EPERM:

2627

logger.error("No permission to bind to"

2628

" interface %s", self.interface)

2629

elif error.errno == errno.ENOPROTOOPT:

2630

logger.error("SO_BINDTODEVICE not available;"

2631

" cannot bind to interface %s",

2632

self.interface)

2633

elif error.errno == errno.ENODEV:

2634

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

2635

" cannot bind", self.interface)

2636

else:

2637

raise

1853

2638

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

1854

2639

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

2640

if self.server_address[1]:

2641

self.allow_reuse_address = True

1855

2642

if not self.server_address[0]:

1856

2643

if self.address_family == socket.AF_INET6:

1857

any_address = "::" # in6addr_any

2644

any_address = "::" # in6addr_any

1858

2645

else:

1859

any_address = socket.INADDR_ANY

2646

any_address = "0.0.0.0" # INADDR_ANY

1860

2647

self.server_address = (any_address,

1861

2648

self.server_address[1])

1862

2649

elif not self.server_address[1]:

1863

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

1864

0)

2650

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

1865

2651

# if self.interface:

1866

2652

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

1867

2653

# 0, # port

1873

2659

1874

2660

class MandosServer(IPv6_TCPServer):

1875

2661

"""Mandos server.

1876

2662

1877

2663

Attributes:

1878

2664

clients: set of Client objects

1879

2665

gnutls_priority GnuTLS priority string

1880

2666

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

1881

1882

Assumes a gobject.MainLoop event loop.

2667

2668

Assumes a GLib.MainLoop event loop.

1883

2669

"""

2670

1884

2671

def __init__(self, server_address, RequestHandlerClass,

1885

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

1886

gnutls_priority=None, use_dbus=True):

2672

interface=None,

2673

use_ipv6=True,

2674

clients=None,

2675

gnutls_priority=None,

2676

use_dbus=True,

2677

socketfd=None):

1887

2678

self.enabled = False

1888

2679

self.clients = clients

1889

2680

if self.clients is None:

1892

2683

self.gnutls_priority = gnutls_priority

1893

2684

IPv6_TCPServer.__init__(self, server_address,

1894

2685

RequestHandlerClass,

1895

interface = interface,

1896

use_ipv6 = use_ipv6)

2686

interface=interface,

2687

use_ipv6=use_ipv6,

2688

socketfd=socketfd)

2689

1897

2690

def server_activate(self):

1898

2691

if self.enabled:

1899

2692

return socketserver.TCPServer.server_activate(self)

1900

2693

1901

2694

def enable(self):

1902

2695

self.enabled = True

1903

2696

1904

2697

def add_pipe(self, parent_pipe, proc):

1905

2698

# Call "handle_ipc" for both data and EOF events

1906

gobject.io_add_watch(parent_pipe.fileno(),

1907

gobject.IO_IN | gobject.IO_HUP,

1908

functools.partial(self.handle_ipc,

1909

parent_pipe =

1910

parent_pipe,

1911

proc = proc))

1912

1913

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

1914

proc = None, client_object=None):

1915

condition_names = {

1916

gobject.IO_IN: "IN", # There is data to read.

1917

gobject.IO_OUT: "OUT", # Data can be written (without

1918

# blocking).

1919

gobject.IO_PRI: "PRI", # There is urgent data to read.

1920

gobject.IO_ERR: "ERR", # Error condition.

1921

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1922

# broken, usually for pipes and

1923

# sockets).

1924

}

1925

conditions_string = ' | '.join(name

1926

for cond, name in

1927

condition_names.iteritems()

1928

if cond & condition)

2699

GLib.io_add_watch(

2700

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

2701

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

2702

functools.partial(self.handle_ipc,

2703

parent_pipe=parent_pipe,

2704

proc=proc))

2705

2706

def handle_ipc(self, source, condition,

2707

parent_pipe=None,

2708

proc=None,

2709

client_object=None):

1929

2710

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

1930

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

2711

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

1931

2712

# Wait for other process to exit

1932

2713

proc.join()

1933

2714

return False

1934

2715

1935

2716

# Read a request from the child

1936

2717

request = parent_pipe.recv()

1937

2718

command = request[0]

1938

2719

1939

2720

if command == 'init':

1940

fpr = request[1]

1941

address = request[2]

1942

1943

for c in self.clients.itervalues():

1944

if c.fingerprint == fpr:

2721

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

2722

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

2723

address = request[3]

2724

2725

for c in self.clients.values():

2726

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2727

continue

2728

if key_id and c.key_id == key_id:

2729

client = c

2730

break

2731

if fpr and c.fingerprint == fpr:

1945

2732

client = c

1946

2733

break

1947

2734

else:

1948

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

1949

"dress: %s", fpr, address)

2735

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

2736

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

1950

2737

if self.use_dbus:

1951

2738

# Emit D-Bus signal

1952

mandos_dbus_service.ClientNotFound(fpr,

2739

mandos_dbus_service.ClientNotFound(key_id or fpr,

1953

2740

address[0])

1954

2741

parent_pipe.send(False)

1955

2742

return False

1956

1957

gobject.io_add_watch(parent_pipe.fileno(),

1958

gobject.IO_IN | gobject.IO_HUP,

1959

functools.partial(self.handle_ipc,

1960

parent_pipe =

1961

parent_pipe,

1962

proc = proc,

1963

client_object =

1964

client))

2743

2744

GLib.io_add_watch(

2745

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

2746

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

2747

functools.partial(self.handle_ipc,

2748

parent_pipe=parent_pipe,

2749

proc=proc,

2750

client_object=client))

1965

2751

parent_pipe.send(True)

1966

2752

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

1967

2753

# same fileno

1970

2756

funcname = request[1]

1971

2757

args = request[2]

1972

2758

kwargs = request[3]

1973

2759

1974

2760

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

1975

2761

funcname)(*args,

1976

**kwargs)))

1977

2762

**kwargs)))

2763

1978

2764

if command == 'getattr':

1979

2765

attrname = request[1]

1980

if callable(client_object.__getattribute__(attrname)):

1981

parent_pipe.send(('function',))

2766

if isinstance(client_object.__getattribute__(attrname),

2767

collections.abc.Callable):

2768

parent_pipe.send(('function', ))

1982

2769

else:

1983

parent_pipe.send(('data', client_object

1984

.__getattribute__(attrname)))

1985

2770

parent_pipe.send((

2771

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

2772

1986

2773

if command == 'setattr':

1987

2774

attrname = request[1]

1988

2775

value = request[2]

1989

2776

setattr(client_object, attrname, value)

1990

2777

1991

2778

return True

1992

2779

1993

2780

2781

def rfc3339_duration_to_delta(duration):

2782

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

2783

2784

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

2785

True

2786

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

2787

True

2788

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

2789

True

2790

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

2791

True

2792

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

2793

True

2794

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

2795

True

2796

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

2797

True

2798

"""

2799

2800

# Parsing an RFC 3339 duration with regular expressions is not

2801

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

2802

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

2803

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

2804

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

2805

# avoid excessive use of external libraries.

2806

2807

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

2808

Token = collections.namedtuple("Token", (

2809

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

2810

# a "group" containing digits

2811

"value", # datetime.timedelta or None

2812

"followers")) # Tokens valid after this token

2813

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

2814

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

2815

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

2816

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

2817

datetime.timedelta(seconds=1),

2818

frozenset((token_end, )))

2819

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

2820

datetime.timedelta(minutes=1),

2821

frozenset((token_second, token_end)))

2822

token_hour = Token(re.compile(r"(\d+)H"),

2823

datetime.timedelta(hours=1),

2824

frozenset((token_minute, token_end)))

2825

token_time = Token(re.compile(r"T"),

2826

None,

2827

frozenset((token_hour, token_minute,

2828

token_second)))

2829

token_day = Token(re.compile(r"(\d+)D"),

2830

datetime.timedelta(days=1),

2831

frozenset((token_time, token_end)))

2832

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

2833

datetime.timedelta(weeks=4),

2834

frozenset((token_day, token_end)))

2835

token_year = Token(re.compile(r"(\d+)Y"),

2836

datetime.timedelta(weeks=52),

2837

frozenset((token_month, token_end)))

2838

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

2839

datetime.timedelta(weeks=1),

2840

frozenset((token_end, )))

2841

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

2842

frozenset((token_year, token_month,

2843

token_day, token_time,

2844

token_week)))

2845

# Define starting values:

2846

# Value so far

2847

value = datetime.timedelta()

2848

found_token = None

2849

# Following valid tokens

2850

followers = frozenset((token_duration, ))

2851

# String left to parse

2852

s = duration

2853

# Loop until end token is found

2854

while found_token is not token_end:

2855

# Search for any currently valid tokens

2856

for token in followers:

2857

match = token.regexp.match(s)

2858

if match is not None:

2859

# Token found

2860

if token.value is not None:

2861

# Value found, parse digits

2862

factor = int(match.group(1), 10)

2863

# Add to value so far

2864

value += factor * token.value

2865

# Strip token from string

2866

s = token.regexp.sub("", s, 1)

2867

# Go to found token

2868

found_token = token

2869

# Set valid next tokens

2870

followers = found_token.followers

2871

break

2872

else:

2873

# No currently valid tokens were found

2874

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

2875

.format(duration))

2876

# End token found

2877

return value

2878

2879

1994

2880

def string_to_delta(interval):

1995

2881

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

1996

1997

>>> string_to_delta('7d')

1998

datetime.timedelta(7)

1999

>>> string_to_delta('60s')

2000

datetime.timedelta(0, 60)

2001

>>> string_to_delta('60m')

2002

datetime.timedelta(0, 3600)

2003

>>> string_to_delta('24h')

2004

datetime.timedelta(1)

2005

>>> string_to_delta('1w')

2006

datetime.timedelta(7)

2007

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

2008

datetime.timedelta(0, 330)

2882

2883

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

2884

True

2885

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

2886

True

2887

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

2888

True

2889

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

2890

True

2891

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

2892

True

2893

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

2894

True

2009

2895

"""

2896

2897

try:

2898

return rfc3339_duration_to_delta(interval)

2899

except ValueError:

2900

pass

2901

2010

2902

timevalue = datetime.timedelta(0)

2011

2903

for s in interval.split():

2012

2904

try:

2013

suffix = unicode(s[-1])

2905

suffix = s[-1]

2014

2906

value = int(s[:-1])

2015

2907

if suffix == "d":

2016

2908

delta = datetime.timedelta(value)

2023

2915

elif suffix == "w":

2024

2916

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

2025

2917

else:

2026

raise ValueError("Unknown suffix %r" % suffix)

2027

except (ValueError, IndexError) as e:

2918

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

2919

except IndexError as e:

2028

2920

raise ValueError(*(e.args))

2029

2921

timevalue += delta

2030

2922

return timevalue

2031

2923

2032

2924

2033

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

2925

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

2034

2926

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

2035

2927

2036

2928

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

2037

2929

if os.fork():

2038

2930

sys.exit()

2046

2938

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

2047

2939

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

2048

2940

raise OSError(errno.ENODEV,

2049

"%s not a character device"

2050

% os.devnull)

2941

"{} not a character device"

2942

.format(os.devnull))

2051

2943

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

2052

2944

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

2053

2945

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

2056

2948

2057

2949

2058

2950

def main():

2059

2951

2060

2952

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

2061

2953

# Parsing of options, both command line and config file

2062

2954

2063

2955

parser = argparse.ArgumentParser()

2064

2956

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

2065

version = "%%(prog)s %s" % version,

2957

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

2066

2958

help="show version number and exit")

2067

2959

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

2068

2960

help="Bind to interface IF")

2074

2966

help="Run self-test")

2075

2967

parser.add_argument("--debug", action="store_true",

2076

2968

help="Debug mode; run in foreground and log"

2077

" to terminal")

2969

" to terminal", default=None)

2078

2970

parser.add_argument("--debuglevel", metavar="LEVEL",

2079

2971

help="Debug level for stdout output")

2080

2972

parser.add_argument("--priority", help="GnuTLS"

2087

2979

" files")

2088

2980

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

2089

2981

dest="use_dbus", help="Do not provide D-Bus"

2090

" system bus interface")

2982

" system bus interface", default=None)

2091

2983

parser.add_argument("--no-ipv6", action="store_false",

2092

dest="use_ipv6", help="Do not use IPv6")

2984

dest="use_ipv6", help="Do not use IPv6",

2985

default=None)

2093

2986

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

2094

2987

dest="restore", help="Do not restore stored"

2095

" state")

2988

" state", default=None)

2989

parser.add_argument("--socket", type=int,

2990

help="Specify a file descriptor to a network"

2991

" socket to use instead of creating one")

2096

2992

parser.add_argument("--statedir", metavar="DIR",

2097

2993

help="Directory to save/restore state in")

2098

2994

parser.add_argument("--foreground", action="store_true",

2995

help="Run in foreground", default=None)

2996

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

2997

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

2998

default=None)

2999

2099

3000

options = parser.parse_args()

2100

2101

if options.check:

2102

import doctest

2103

doctest.testmod()

2104

sys.exit()

2105

3001

2106

3002

# Default values for config file for server-global settings

2107

server_defaults = { "interface": "",

2108

"address": "",

2109

"port": "",

2110

"debug": "False",

2111

"priority":

2112

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

2113

"servicename": "Mandos",

2114

"use_dbus": "True",

2115

"use_ipv6": "True",

2116

"debuglevel": "",

2117

"restore": "True",

2118

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

2119

}

2120

3003

if gnutls.has_rawpk:

3004

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

3005

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

3006

else:

3007

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

3008

":+SIGN-DSA-SHA256")

3009

server_defaults = {"interface": "",

3010

"address": "",

3011

"port": "",

3012

"debug": "False",

3013

"priority": priority,

3014

"servicename": "Mandos",

3015

"use_dbus": "True",

3016

"use_ipv6": "True",

3017

"debuglevel": "",

3018

"restore": "True",

3019

"socket": "",

3020

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

3021

"foreground": "False",

3022

"zeroconf": "True",

3023

}

3024

del priority

3025

2121

3026

# Parse config file for server-global settings

2122

server_config = configparser.SafeConfigParser(server_defaults)

3027

server_config = configparser.ConfigParser(server_defaults)

2123

3028

del server_defaults

2124

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

2125

"mandos.conf"))

2126

# Convert the SafeConfigParser object to a dict

3029

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

3030

# Convert the ConfigParser object to a dict

2127

3031

server_settings = server_config.defaults()

2128

3032

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

2129

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

3033

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

3034

"foreground", "zeroconf"):

2130

3035

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

2131

3036

option)

2132

3037

if server_settings["port"]:

2133

3038

server_settings["port"] = server_config.getint("DEFAULT",

2134

3039

"port")

3040

if server_settings["socket"]:

3041

server_settings["socket"] = server_config.getint("DEFAULT",

3042

"socket")

3043

# Later, stdin will, and stdout and stderr might, be dup'ed

3044

# over with an opened os.devnull. But we don't want this to

3045

# happen with a supplied network socket.

3046

if 0 <= server_settings["socket"] <= 2:

3047

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

3048

["socket"])

2135

3049

del server_config

2136

3050

2137

3051

# Override the settings from the config file with command line

2138

3052

# options, if set.

2139

3053

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

2140

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

2141

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

2142

"statedir"):

3054

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

3055

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

3056

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

2143

3057

value = getattr(options, option)

2144

3058

if value is not None:

2145

3059

server_settings[option] = value

2146

3060

del options

2147

3061

# Force all strings to be unicode

2148

3062

for option in server_settings.keys():

2149

if type(server_settings[option]) is str:

2150

server_settings[option] = unicode(server_settings[option])

3063

if isinstance(server_settings[option], bytes):

3064

server_settings[option] = (server_settings[option]

3065

.decode("utf-8"))

3066

# Force all boolean options to be boolean

3067

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

3068

"foreground", "zeroconf"):

3069

server_settings[option] = bool(server_settings[option])

3070

# Debug implies foreground

3071

if server_settings["debug"]:

3072

server_settings["foreground"] = True

2151

3073

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

2152

3074

2153

3075

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

2154

3076

3077

if (not server_settings["zeroconf"]

3078

and not (server_settings["port"]

3079

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

3080

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

3081

2155

3082

# For convenience

2156

3083

debug = server_settings["debug"]

2157

3084

debuglevel = server_settings["debuglevel"]

2159

3086

use_ipv6 = server_settings["use_ipv6"]

2160

3087

stored_state_path = os.path.join(server_settings["statedir"],

2161

3088

stored_state_file)

2162

3089

foreground = server_settings["foreground"]

3090

zeroconf = server_settings["zeroconf"]

3091

2163

3092

if debug:

2164

3093

initlogger(debug, logging.DEBUG)

2165

3094

else:

2168

3097

else:

2169

3098

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

2170

3099

initlogger(debug, level)

2171

3100

2172

3101

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

2173

syslogger.setFormatter(logging.Formatter

2174

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

2175

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

2176

% server_settings["servicename"]))

2177

3102

syslogger.setFormatter(

3103

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

3104

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

3105

server_settings["servicename"])))

3106

2178

3107

# Parse config file with clients

2179

client_config = configparser.SafeConfigParser(Client

2180

.client_defaults)

3108

client_config = configparser.ConfigParser(Client.client_defaults)

2181

3109

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

2182

3110

"clients.conf"))

2183

3111

2184

3112

global mandos_dbus_service

2185

3113

mandos_dbus_service = None

2186

2187

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

2188

server_settings["port"]),

2189

ClientHandler,

2190

interface=(server_settings["interface"]

2191

or None),

2192

use_ipv6=use_ipv6,

2193

gnutls_priority=

2194

server_settings["priority"],

2195

use_dbus=use_dbus)

2196

if not debug:

2197

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

2198

try:

2199

pidfile = open(pidfilename, "w")

2200

except IOError:

2201

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

2202

2203

try:

2204

uid = pwd.getpwnam("_mandos").pw_uid

2205

gid = pwd.getpwnam("_mandos").pw_gid

2206

except KeyError:

2207

try:

2208

uid = pwd.getpwnam("mandos").pw_uid

2209

gid = pwd.getpwnam("mandos").pw_gid

3114

3115

socketfd = None

3116

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

3117

socketfd = server_settings["socket"]

3118

tcp_server = MandosServer(

3119

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

3120

ClientHandler,

3121

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

3122

use_ipv6=use_ipv6,

3123

gnutls_priority=server_settings["priority"],

3124

use_dbus=use_dbus,

3125

socketfd=socketfd)

3126

if not foreground:

3127

pidfilename = "/run/mandos.pid"

3128

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

3129

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

3130

pidfile = None

3131

try:

3132

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

3133

except IOError as e:

3134

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

3135

exc_info=e)

3136

3137

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

3138

("mandos", "mandos"),

3139

("nobody", "nogroup")):

3140

try:

3141

uid = pwd.getpwnam(name).pw_uid

3142

gid = pwd.getpwnam(group).pw_gid

3143

break

2210

3144

except KeyError:

2211

try:

2212

uid = pwd.getpwnam("nobody").pw_uid

2213

gid = pwd.getpwnam("nobody").pw_gid

2214

except KeyError:

2215

uid = 65534

2216

gid = 65534

3145

continue

3146

else:

3147

uid = 65534

3148

gid = 65534

2217

3149

try:

2218

3150

os.setgid(gid)

2219

3151

os.setuid(uid)

3152

if debug:

3153

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

3154

gid))

2220

3155

except OSError as error:

2221

if error[0] != errno.EPERM:

2222

raise error

2223

3156

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

3157

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

3158

if error.errno != errno.EPERM:

3159

raise

3160

2224

3161

if debug:

2225

3162

# Enable all possible GnuTLS debugging

2226

3163

2227

3164

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

2228

3165

# - GnuTLS manual

2229

gnutls.library.functions.gnutls_global_set_log_level(11)

2230

2231

@gnutls.library.types.gnutls_log_func

3166

gnutls.global_set_log_level(11)

3167

3168

@gnutls.log_func

2232

3169

def debug_gnutls(level, string):

2233

3170

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

2234

2235

(gnutls.library.functions

2236

.gnutls_global_set_log_function(debug_gnutls))

2237

3171

3172

gnutls.global_set_log_function(debug_gnutls)

3173

2238

3174

# Redirect stdin so all checkers get /dev/null

2239

3175

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

2240

3176

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

2241

3177

if null > 2:

2242

3178

os.close(null)

2243

3179

2244

3180

# Need to fork before connecting to D-Bus

2245

if not debug:

3181

if not foreground:

2246

3182

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

2247

3183

daemon()

2248

2249

gobject.threads_init()

2250

3184

3185

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

3186

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

3187

# need to inform GLib that threads will be used.

3188

GLib.threads_init()

3189

2251

3190

global main_loop

2252

3191

# From the Avahi example code

2253

3192

DBusGMainLoop(set_as_default=True)

2254

main_loop = gobject.MainLoop()

3193

main_loop = GLib.MainLoop()

2255

3194

bus = dbus.SystemBus()

2256

3195

# End of Avahi example code

2257

3196

if use_dbus:

2258

3197

try:

2259

3198

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

2260

bus, do_not_queue=True)

2261

old_bus_name = (dbus.service.BusName

2262

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

2263

do_not_queue=True))

2264

except dbus.exceptions.NameExistsException as e:

2265

logger.error(unicode(e) + ", disabling D-Bus")

3199

bus,

3200

do_not_queue=True)

3201

old_bus_name = dbus.service.BusName(

3202

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

3203

do_not_queue=True)

3204

except dbus.exceptions.DBusException as e:

3205

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

2266

3206

use_dbus = False

2267

3207

server_settings["use_dbus"] = False

2268

3208

tcp_server.use_dbus = False

2269

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2270

service = AvahiServiceToSyslog(name =

2271

server_settings["servicename"],

2272

servicetype = "_mandos._tcp",

2273

protocol = protocol, bus = bus)

2274

if server_settings["interface"]:

2275

service.interface = (if_nametoindex

2276

(str(server_settings["interface"])))

2277

3209

if zeroconf:

3210

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3211

service = AvahiServiceToSyslog(

3212

name=server_settings["servicename"],

3213

servicetype="_mandos._tcp",

3214

protocol=protocol,

3215

bus=bus)

3216

if server_settings["interface"]:

3217

service.interface = if_nametoindex(

3218

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

3219

2278

3220

global multiprocessing_manager

2279

3221

multiprocessing_manager = multiprocessing.Manager()

2280

3222

2281

3223

client_class = Client

2282

3224

if use_dbus:

2283

client_class = functools.partial(ClientDBusTransitional,

2284

bus = bus)

2285

3225

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

3226

2286

3227

client_settings = Client.config_parser(client_config)

2287

3228

old_client_settings = {}

2288

3229

clients_data = {}

2289

3230

3231

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

3232

global wnull

3233

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

3234

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

3235

# mode

3236

if debug or not foreground:

3237

wnull.close()

3238

2290

3239

# Get client data and settings from last running state.

2291

3240

if server_settings["restore"]:

2292

3241

try:

2293

3242

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

2294

clients_data, old_client_settings = (pickle.load

2295

(stored_state))

3243

if sys.version_info.major == 2:

3244

clients_data, old_client_settings = pickle.load(

3245

stored_state)

3246

else:

3247

bytes_clients_data, bytes_old_client_settings = (

3248

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

3249

# Fix bytes to strings

3250

# clients_data

3251

# .keys()

3252

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

3253

if isinstance(key, bytes)

3254

else key): value

3255

for key, value in

3256

bytes_clients_data.items()}

3257

del bytes_clients_data

3258

for key in clients_data:

3259

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

3260

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

3261

for k, v in

3262

clients_data[key].items()}

3263

clients_data[key] = value

3264

# .client_structure

3265

value["client_structure"] = [

3266

(s.decode("utf-8")

3267

if isinstance(s, bytes)

3268

else s) for s in

3269

value["client_structure"]]

3270

# .name, .host, and .checker_command

3271

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

3272

if isinstance(value[k], bytes):

3273

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

3274

if "key_id" not in value:

3275

value["key_id"] = ""

3276

elif "fingerprint" not in value:

3277

value["fingerprint"] = ""

3278

# old_client_settings

3279

# .keys()

3280

old_client_settings = {

3281

(key.decode("utf-8")

3282

if isinstance(key, bytes)

3283

else key): value

3284

for key, value in

3285

bytes_old_client_settings.items()}

3286

del bytes_old_client_settings

3287

# .host and .checker_command

3288

for value in old_client_settings.values():

3289

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

3290

if isinstance(value[attribute], bytes):

3291

value[attribute] = (value[attribute]

3292

.decode("utf-8"))

2296

3293

os.remove(stored_state_path)

2297

3294

except IOError as e:

2298

logger.warning("Could not load persistent state: {0}"

2299

.format(e))

2300

if e.errno != errno.ENOENT:

3295

if e.errno == errno.ENOENT:

3296

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

3297

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

3298

else:

3299

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

3300

exc_info=e)

2301

3301

raise

2302

3302

except EOFError as e:

2303

3303

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

2304

"EOFError: {0}".format(e))

2305

3304

"EOFError:",

3305

exc_info=e)

3306

2306

3307

with PGPEngine() as pgp:

2307

for client_name, client in clients_data.iteritems():

3308

for client_name, client in clients_data.items():

3309

# Skip removed clients

3310

if client_name not in client_settings:

3311

continue

3312

2308

3313

# Decide which value to use after restoring saved state.

2309

3314

# We have three different values: Old config file,

2310

3315

# new config file, and saved state.

2315

3320

# For each value in new config, check if it

2316

3321

# differs from the old config value (Except for

2317

3322

# the "secret" attribute)

2318

if (name != "secret" and

2319

value != old_client_settings[client_name]

2320

[name]):

3323

if (name != "secret"

3324

and (value !=

3325

old_client_settings[client_name][name])):

2321

3326

client[name] = value

2322

3327

except KeyError:

2323

3328

pass

2324

3329

2325

3330

# Clients who has passed its expire date can still be

2326

# enabled if its last checker was successful. Clients

3331

# enabled if its last checker was successful. A Client

2327

3332

# whose checker succeeded before we stored its state is

2328

3333

# assumed to have successfully run all checkers during

2329

3334

# downtime.

2331

3336

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

2332

3337

if not client["last_checked_ok"]:

2333

3338

logger.warning(

2334

"disabling client {0} - Client never "

2335

"performed a successful checker"

2336

.format(client_name))

3339

"disabling client {} - Client never "

3340

"performed a successful checker".format(

3341

client_name))

2337

3342

client["enabled"] = False

2338

3343

elif client["last_checker_status"] != 0:

2339

3344

logger.warning(

2340

"disabling client {0} - Client "

2341

"last checker failed with error code {1}"

2342

.format(client_name,

2343

client["last_checker_status"]))

3345

"disabling client {} - Client last"

3346

" checker failed with error code"

3347

" {}".format(

3348

client_name,

3349

client["last_checker_status"]))

2344

3350

client["enabled"] = False

2345

3351

else:

2346

client["expires"] = (datetime.datetime

2347

.utcnow()

2348

+ client["timeout"])

3352

client["expires"] = (

3353

datetime.datetime.utcnow()

3354

+ client["timeout"])

2349

3355

logger.debug("Last checker succeeded,"

2350

" keeping {0} enabled"

2351

.format(client_name))

3356

" keeping {} enabled".format(

3357

client_name))

2352

3358

try:

2353

client["secret"] = (

2354

pgp.decrypt(client["encrypted_secret"],

2355

client_settings[client_name]

2356

["secret"]))

3359

client["secret"] = pgp.decrypt(

3360

client["encrypted_secret"],

3361

client_settings[client_name]["secret"])

2357

3362

except PGPError:

2358

3363

# If decryption fails, we use secret from new settings

2359

logger.debug("Failed to decrypt {0} old secret"

2360

.format(client_name))

2361

client["secret"] = (

2362

client_settings[client_name]["secret"])

3364

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

3365

client_name))

3366

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

3367

["secret"])

2363

3368

2364

2365

3369

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

2366

3370

for client_name in (set(old_client_settings)

2367

3371

- set(client_settings)):

2371

3375

clients_data[client_name] = client_settings[client_name]

2372

3376

2373

3377

# Create all client objects

2374

for client_name, client in clients_data.iteritems():

3378

for client_name, client in clients_data.items():

2375

3379

tcp_server.clients[client_name] = client_class(

2376

name = client_name, settings = client)

2377

3380

name=client_name,

3381

settings=client,

3382

server_settings=server_settings)

3383

2378

3384

if not tcp_server.clients:

2379

3385

logger.warning("No clients defined")

2380

2381

if not debug:

2382

try:

2383

with pidfile:

2384

pid = os.getpid()

2385

pidfile.write(str(pid) + "\n".encode("utf-8"))

2386

del pidfile

2387

except IOError:

2388

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

2389

pidfilename, pid)

2390

except NameError:

2391

# "pidfile" was never created

2392

pass

3386

3387

if not foreground:

3388

if pidfile is not None:

3389

pid = os.getpid()

3390

try:

3391

with pidfile:

3392

print(pid, file=pidfile)

3393

except IOError:

3394

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

3395

pidfilename, pid)

3396

del pidfile

2393

3397

del pidfilename

2394

signal.signal(signal.SIGINT, signal.SIG_IGN)

2395

2396

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

2397

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

2398

3398

3399

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

3400

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3401

lambda: main_loop.quit() and False)

3402

2399

3403

if use_dbus:

2400

class MandosDBusService(DBusObjectWithProperties):

3404

3405

@alternate_dbus_interfaces(

3406

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

3407

class MandosDBusService(DBusObjectWithObjectManager):

2401

3408

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

3409

2402

3410

def __init__(self):

2403

3411

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

3412

2404

3413

_interface = "se.recompile.Mandos"

2405

2406

@dbus_interface_annotations(_interface)

2407

def _foo(self):

2408

return { "org.freedesktop.DBus.Property"

2409

".EmitsChangedSignal":

2410

"false"}

2411

3414

2412

3415

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

2413

3416

def ClientAdded(self, objpath):

2414

3417

"D-Bus signal"

2415

3418

pass

2416

3419

2417

3420

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

2418

def ClientNotFound(self, fingerprint, address):

3421

def ClientNotFound(self, key_id, address):

2419

3422

"D-Bus signal"

2420

3423

pass

2421

3424

3425

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

3426

"true"})

2422

3427

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

2423

3428

def ClientRemoved(self, objpath, name):

2424

3429

"D-Bus signal"

2425

3430

pass

2426

3431

3432

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

3433

"true"})

2427

3434

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

2428

3435

def GetAllClients(self):

2429

3436

"D-Bus method"

2430

return dbus.Array(c.dbus_object_path

2431

for c in

2432

tcp_server.clients.itervalues())

2433

3437

return dbus.Array(c.dbus_object_path for c in

3438

tcp_server.clients.values())

3439

3440

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

3441

"true"})

2434

3442

@dbus.service.method(_interface,

2435

3443

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

2436

3444

def GetAllClientsWithProperties(self):

2437

3445

"D-Bus method"

2438

3446

return dbus.Dictionary(

2439

((c.dbus_object_path, c.GetAll(""))

2440

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

3447

{c.dbus_object_path: c.GetAll(

3448

"se.recompile.Mandos.Client")

3449

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

2441

3450

signature="oa{sv}")

2442

3451

2443

3452

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

2444

3453

def RemoveClient(self, object_path):

2445

3454

"D-Bus method"

2446

for c in tcp_server.clients.itervalues():

3455

for c in tcp_server.clients.values():

2447

3456

if c.dbus_object_path == object_path:

2448

3457

del tcp_server.clients[c.name]

2449

3458

c.remove_from_connection()

2450

# Don't signal anything except ClientRemoved

3459

# Don't signal the disabling

2451

3460

c.disable(quiet=True)

2452

# Emit D-Bus signal

2453

self.ClientRemoved(object_path, c.name)

3461

# Emit D-Bus signal for removal

3462

self.client_removed_signal(c)

2454

3463

return

2455

3464

raise KeyError(object_path)

2456

3465

2457

3466

del _interface

2458

2459

class MandosDBusServiceTransitional(MandosDBusService):

2460

__metaclass__ = AlternateDBusNamesMetaclass

2461

mandos_dbus_service = MandosDBusServiceTransitional()

2462

3467

3468

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3469

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

3470

def GetManagedObjects(self):

3471

"""D-Bus method"""

3472

return dbus.Dictionary(

3473

{client.dbus_object_path:

3474

dbus.Dictionary(

3475

{interface: client.GetAll(interface)

3476

for interface in

3477

client._get_all_interface_names()})

3478

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

3479

3480

def client_added_signal(self, client):

3481

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

3482

if use_dbus:

3483

# New standard signal

3484

self.InterfacesAdded(

3485

client.dbus_object_path,

3486

dbus.Dictionary(

3487

{interface: client.GetAll(interface)

3488

for interface in

3489

client._get_all_interface_names()}))

3490

# Old signal

3491

self.ClientAdded(client.dbus_object_path)

3492

3493

def client_removed_signal(self, client):

3494

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

3495

if use_dbus:

3496

# New standard signal

3497

self.InterfacesRemoved(

3498

client.dbus_object_path,

3499

client._get_all_interface_names())

3500

# Old signal

3501

self.ClientRemoved(client.dbus_object_path,

3502

client.name)

3503

3504

mandos_dbus_service = MandosDBusService()

3505

3506

# Save modules to variables to exempt the modules from being

3507

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

3508

mp = multiprocessing

3509

wn = wnull

3510

2463

3511

def cleanup():

2464

3512

"Cleanup function; run on exit"

2465

service.cleanup()

2466

2467

multiprocessing.active_children()

3513

if zeroconf:

3514

service.cleanup()

3515

3516

mp.active_children()

3517

wn.close()

2468

3518

if not (tcp_server.clients or client_settings):

2469

3519

return

2470

3520

2471

3521

# Store client before exiting. Secrets are encrypted with key

2472

3522

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

2473

3523

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

2474

3524

clients = {}

2475

3525

with PGPEngine() as pgp:

2476

for client in tcp_server.clients.itervalues():

3526

for client in tcp_server.clients.values():

2477

3527

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

2478

3528

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

2479

3529

key)

2480

3530

client_dict = {}

2481

3531

2482

3532

# A list of attributes that can not be pickled

2483

3533

# + secret.

2484

exclude = set(("bus", "changedstate", "secret",

2485

"checker"))

2486

for name, typ in (inspect.getmembers

2487

(dbus.service.Object)):

3534

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

3535

"checker", "server_settings"}

3536

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

3537

.Object):

2488

3538

exclude.add(name)

2489

3539

2490

3540

client_dict["encrypted_secret"] = (client

2491

3541

.encrypted_secret)

2492

3542

for attr in client.client_structure:

2493

3543

if attr not in exclude:

2494

3544

client_dict[attr] = getattr(client, attr)

2495

3545

2496

3546

clients[client.name] = client_dict

2497

3547

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

2498

3548

2499

3549

try:

2500

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2501

prefix="clients-",

2502

dir=os.path.dirname

2503

(stored_state_path))

2504

with os.fdopen(tempfd, "wb") as stored_state:

2505

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

3550

with tempfile.NamedTemporaryFile(

3551

mode='wb',

3552

suffix=".pickle",

3553

prefix='clients-',

3554

dir=os.path.dirname(stored_state_path),

3555

delete=False) as stored_state:

3556

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

3557

protocol=2)

3558

tempname = stored_state.name

2506

3559

os.rename(tempname, stored_state_path)

2507

3560

except (IOError, OSError) as e:

2508

logger.warning("Could not save persistent state: {0}"

2509

.format(e))

2510

3561

if not debug:

2511

3562

try:

2512

3563

os.remove(tempname)

2513

3564

except NameError:

2514

3565

pass

2515

if e.errno not in set((errno.ENOENT, errno.EACCES,

2516

errno.EEXIST)):

2517

raise e

2518

3566

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

3567

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

3568

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

3569

else:

3570

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

3571

exc_info=e)

3572

raise

3573

2519

3574

# Delete all clients, and settings from config

2520

3575

while tcp_server.clients:

2521

3576

name, client = tcp_server.clients.popitem()

2522

3577

if use_dbus:

2523

3578

client.remove_from_connection()

2524

# Don't signal anything except ClientRemoved

3579

# Don't signal the disabling

2525

3580

client.disable(quiet=True)

3581

# Emit D-Bus signal for removal

2526

3582

if use_dbus:

2527

# Emit D-Bus signal

2528

mandos_dbus_service.ClientRemoved(client

2529

.dbus_object_path,

2530

client.name)

3583

mandos_dbus_service.client_removed_signal(client)

2531

3584

client_settings.clear()

2532

3585

2533

3586

atexit.register(cleanup)

2534

2535

for client in tcp_server.clients.itervalues():

3587

3588

for client in tcp_server.clients.values():

2536

3589

if use_dbus:

2537

# Emit D-Bus signal

2538

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3590

# Emit D-Bus signal for adding

3591

mandos_dbus_service.client_added_signal(client)

2539

3592

# Need to initiate checking of clients

2540

3593

if client.enabled:

2541

3594

client.init_checker()

2542

3595

2543

3596

tcp_server.enable()

2544

3597

tcp_server.server_activate()

2545

3598

2546

3599

# Find out what port we got

2547

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

3600

if zeroconf:

3601

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

2548

3602

if use_ipv6:

2549

3603

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

2550

" flowinfo %d, scope_id %d"

2551

% tcp_server.socket.getsockname())

3604

" flowinfo %d, scope_id %d",

3605

*tcp_server.socket.getsockname())

2552

3606

else: # IPv4

2553

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

2554

% tcp_server.socket.getsockname())

2555

2556

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

2557

3607

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

3608

*tcp_server.socket.getsockname())

3609

3610

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

3611

2558

3612

try:

2559

# From the Avahi example code

2560

try:

2561

service.activate()

2562

except dbus.exceptions.DBusException as error:

2563

logger.critical("DBusException: %s", error)

2564

cleanup()

2565

sys.exit(1)

2566

# End of Avahi example code

2567

2568

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

2569

lambda *args, **kwargs:

2570

(tcp_server.handle_request

2571

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

2572

3613

if zeroconf:

3614

# From the Avahi example code

3615

try:

3616

service.activate()

3617

except dbus.exceptions.DBusException as error:

3618

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

3619

cleanup()

3620

sys.exit(1)

3621

# End of Avahi example code

3622

3623

GLib.io_add_watch(

3624

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

3625

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3626

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

3627

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

3628

2573

3629

logger.debug("Starting main loop")

2574

3630

main_loop.run()

2575

3631

except AvahiError as error:

2576

logger.critical("AvahiError: %s", error)

3632

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

2577

3633

cleanup()

2578

3634

sys.exit(1)

2579

3635

except KeyboardInterrupt:

2584

3640

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

2585

3641

cleanup()

2586

3642

3643

3644

def should_only_run_tests():

3645

parser = argparse.ArgumentParser(add_help=False)

3646

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

3647

args, unknown_args = parser.parse_known_args()

3648

run_tests = args.check

3649

if run_tests:

3650

# Remove --check argument from sys.argv

3651

sys.argv[1:] = unknown_args

3652

return run_tests

3653

3654

# Add all tests from doctest strings

3655

def load_tests(loader, tests, none):

3656

import doctest

3657

tests.addTests(doctest.DocTestSuite())

3658

return tests

3659

2587

3660

if __name__ == '__main__':

2588

main()

3661

try:

3662

if should_only_run_tests():

3663

# Call using ./mandos --check [--verbose]

3664

unittest.main()

3665

else:

3666

main()

3667

finally:

3668

logging.shutdown()