/mandos/release : revision 237.7.531

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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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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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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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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80

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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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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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# 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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# 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.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.8.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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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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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 =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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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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181

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "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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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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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 == "gpg" or self.gpg.endswith("/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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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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def _cleanup(self):

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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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228

176

229

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

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

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return encoded

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239

187

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

242

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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244

passfile.write(passphrase)

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passfile.flush()

193

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

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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,

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stdout = subprocess.PIPE,

199

stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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255

raise PGPError(err)

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return ciphertext

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257

205

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

260

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(['gpg', '--decrypt',

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

215

stdin = subprocess.PIPE,

216

stdout = subprocess.PIPE,

217

stderr = subprocess.PIPE)

218

decrypted_plaintext, err = proc.communicate(input

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= data)

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

220

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

223

275

224

276

277

# Pretend that we have an Avahi module

278

class Avahi(object):

279

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

280

It is instantiated once, and simulates having an Avahi module."""

281

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

282

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

283

PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

286

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

287

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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290

def string_array_to_txt_array(self, t):

291

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

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

293

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

295

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

296

SERVER_INVALID = 0 # avahi-common/defs.h

297

SERVER_REGISTERING = 1 # avahi-common/defs.h

298

SERVER_RUNNING = 2 # avahi-common/defs.h

299

SERVER_COLLISION = 3 # avahi-common/defs.h

300

SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

302

303

225

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class AvahiError(Exception):

226

305

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

227

306

self.value = value

228

307

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

229

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**kwargs)

230

309

310

231

311

class AvahiServiceError(AvahiError):

232

312

pass

233

313

314

234

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class AvahiGroupError(AvahiError):

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pass

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318

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

240

321

241

322

Attributes:

242

323

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

243

324

Used to optionally bind to the specified interface.

255

336

server: D-Bus Server

256

337

bus: dbus.SystemBus()

257

338

"""

258

259

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

260

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

261

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

262

protocol = avahi.PROTO_UNSPEC, bus = None):

339

340

def __init__(self,

341

interface=avahi.IF_UNSPEC,

342

name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

346

domain="",

347

host="",

348

max_renames=32768,

349

protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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352

self.name = name

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353

self.type = servicetype

274

362

self.server = None

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363

self.bus = bus

276

364

self.entry_group_state_changed_match = None

277

365

278

366

def rename(self, remove=True):

279

367

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

280

368

if self.rename_count >= self.max_renames:

282

370

" after %i retries, exiting.",

283

371

self.rename_count)

284

372

raise AvahiServiceError("Too many renames")

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

287

375

self.rename_count += 1

288

376

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

289

377

self.name)

300

388

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

301

389

self.cleanup()

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os._exit(1)

303

391

304

392

def remove(self):

305

393

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

306

394

if self.entry_group_state_changed_match is not None:

308

396

self.entry_group_state_changed_match = None

309

397

if self.group is not None:

310

398

self.group.Reset()

311

399

312

400

def add(self):

313

401

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

314

402

self.remove()

331

419

dbus.UInt16(self.port),

332

420

avahi.string_array_to_txt_array(self.TXT))

333

421

self.group.Commit()

334

422

335

423

def entry_group_state_changed(self, state, error):

336

424

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

337

425

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

338

426

339

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

340

428

logger.debug("Zeroconf service established.")

341

429

elif state == avahi.ENTRY_GROUP_COLLISION:

344

432

elif state == avahi.ENTRY_GROUP_FAILURE:

345

433

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

346

434

str(error))

347

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

348

.format(error))

349

435

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

436

350

437

def cleanup(self):

351

438

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

352

439

if self.group is not None:

357

444

pass

358

445

self.group = None

359

446

self.remove()

360

447

361

448

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

362

449

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

363

450

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

364

bad_states = { avahi.SERVER_INVALID:

365

"Zeroconf server invalid",

366

avahi.SERVER_REGISTERING: None,

367

avahi.SERVER_COLLISION:

368

"Zeroconf server name collision",

369

avahi.SERVER_FAILURE:

370

"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

371

457

if state in bad_states:

372

458

if bad_states[state] is not None:

373

459

if error is None:

376

462

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

377

463

self.cleanup()

378

464

elif state == avahi.SERVER_RUNNING:

379

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

380

477

else:

381

478

if error is None:

382

479

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

383

480

else:

384

481

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

385

482

386

483

def activate(self):

387

484

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

388

485

if self.server is None:

392

489

follow_name_owner_changes=True),

393

490

avahi.DBUS_INTERFACE_SERVER)

394

491

self.server.connect_to_signal("StateChanged",

395

self.server_state_changed)

492

self.server_state_changed)

396

493

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

397

494

398

495

399

496

class AvahiServiceToSyslog(AvahiService):

400

497

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

401

498

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

402

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

403

syslogger.setFormatter(logging.Formatter

404

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

405

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

406

.format(self.name)))

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

407

503

return ret

408

504

409

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

It is instantiated once, and simulates having a GnuTLS module."""

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

_tls_rawpk_version = b"3.6.6"

518

519

def __init__(self):

520

# Need to use "self" here, since this method is called before

521

# the assignment to the "gnutls" global variable happens.

522

if self.check_version(self._need_version) is None:

523

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

524

.format(self._need_version))

525

526

# Unless otherwise indicated, the constants and types below are

527

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

528

529

# Constants

530

E_SUCCESS = 0

531

E_INTERRUPTED = -52

532

E_AGAIN = -28

533

CRT_OPENPGP = 2

534

CRT_RAWPK = 3

535

CLIENT = 2

536

SHUT_RDWR = 0

537

CRD_CERTIFICATE = 1

538

E_NO_CERTIFICATE_FOUND = -49

539

X509_FMT_DER = 0

540

NO_TICKETS = 1<<10

541

ENABLE_RAWPK = 1<<18

542

CTYPE_PEERS = 3

543

KEYID_USE_SHA256 = 1 # gnutls/x509.h

544

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

545

546

# Types

547

class session_int(ctypes.Structure):

548

_fields_ = []

549

session_t = ctypes.POINTER(session_int)

550

551

class certificate_credentials_st(ctypes.Structure):

552

_fields_ = []

553

certificate_credentials_t = ctypes.POINTER(

554

certificate_credentials_st)

555

certificate_type_t = ctypes.c_int

556

557

class datum_t(ctypes.Structure):

558

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

559

('size', ctypes.c_uint)]

560

561

class openpgp_crt_int(ctypes.Structure):

562

_fields_ = []

563

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

564

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

565

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

566

credentials_type_t = ctypes.c_int

567

transport_ptr_t = ctypes.c_void_p

568

close_request_t = ctypes.c_int

569

570

# Exceptions

571

class Error(Exception):

572

# We need to use the class name "GnuTLS" here, since this

573

# exception might be raised from within GnuTLS.__init__,

574

# which is called before the assignment to the "gnutls"

575

# global variable has happened.

576

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

577

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

578

# code is passed, convert it to a string with

579

# gnutls.strerror()

580

self.code = code

581

if message is None and code is not None:

582

message = GnuTLS.strerror(code)

583

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

584

message, *args)

585

586

class CertificateSecurityError(Error):

587

pass

588

589

# Classes

590

class Credentials(object):

591

def __init__(self):

592

self._c_object = gnutls.certificate_credentials_t()

593

gnutls.certificate_allocate_credentials(

594

ctypes.byref(self._c_object))

595

self.type = gnutls.CRD_CERTIFICATE

596

597

def __del__(self):

598

gnutls.certificate_free_credentials(self._c_object)

599

600

class ClientSession(object):

601

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

602

self._c_object = gnutls.session_t()

603

gnutls_flags = gnutls.CLIENT

604

if gnutls.check_version("3.5.6"):

605

gnutls_flags |= gnutls.NO_TICKETS

606

if gnutls.has_rawpk:

607

gnutls_flags |= gnutls.ENABLE_RAWPK

608

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

609

del gnutls_flags

610

gnutls.set_default_priority(self._c_object)

611

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

612

gnutls.handshake_set_private_extensions(self._c_object,

613

True)

614

self.socket = socket

615

if credentials is None:

616

credentials = gnutls.Credentials()

617

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

618

ctypes.cast(credentials._c_object,

619

ctypes.c_void_p))

620

self.credentials = credentials

621

622

def __del__(self):

623

gnutls.deinit(self._c_object)

624

625

def handshake(self):

626

return gnutls.handshake(self._c_object)

627

628

def send(self, data):

629

data = bytes(data)

630

data_len = len(data)

631

while data_len > 0:

632

data_len -= gnutls.record_send(self._c_object,

633

data[-data_len:],

634

data_len)

635

636

def bye(self):

637

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

638

639

# Error handling functions

640

def _error_code(result):

641

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

642

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

643

if result >= 0:

644

return result

645

if result == gnutls.E_NO_CERTIFICATE_FOUND:

646

raise gnutls.CertificateSecurityError(code=result)

647

raise gnutls.Error(code=result)

648

649

def _retry_on_error(result, func, arguments):

650

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

651

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

652

while result < 0:

653

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

654

return _error_code(result)

655

result = func(*arguments)

656

return result

657

658

# Unless otherwise indicated, the function declarations below are

659

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

660

661

# Functions

662

priority_set_direct = _library.gnutls_priority_set_direct

663

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

664

ctypes.POINTER(ctypes.c_char_p)]

665

priority_set_direct.restype = _error_code

666

667

init = _library.gnutls_init

668

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

669

init.restype = _error_code

670

671

set_default_priority = _library.gnutls_set_default_priority

672

set_default_priority.argtypes = [session_t]

673

set_default_priority.restype = _error_code

674

675

record_send = _library.gnutls_record_send

676

record_send.argtypes = [session_t, ctypes.c_void_p,

677

ctypes.c_size_t]

678

record_send.restype = ctypes.c_ssize_t

679

record_send.errcheck = _retry_on_error

680

681

certificate_allocate_credentials = (

682

_library.gnutls_certificate_allocate_credentials)

683

certificate_allocate_credentials.argtypes = [

684

ctypes.POINTER(certificate_credentials_t)]

685

certificate_allocate_credentials.restype = _error_code

686

687

certificate_free_credentials = (

688

_library.gnutls_certificate_free_credentials)

689

certificate_free_credentials.argtypes = [

690

certificate_credentials_t]

691

certificate_free_credentials.restype = None

692

693

handshake_set_private_extensions = (

694

_library.gnutls_handshake_set_private_extensions)

695

handshake_set_private_extensions.argtypes = [session_t,

696

ctypes.c_int]

697

handshake_set_private_extensions.restype = None

698

699

credentials_set = _library.gnutls_credentials_set

700

credentials_set.argtypes = [session_t, credentials_type_t,

701

ctypes.c_void_p]

702

credentials_set.restype = _error_code

703

704

strerror = _library.gnutls_strerror

705

strerror.argtypes = [ctypes.c_int]

706

strerror.restype = ctypes.c_char_p

707

708

certificate_type_get = _library.gnutls_certificate_type_get

709

certificate_type_get.argtypes = [session_t]

710

certificate_type_get.restype = _error_code

711

712

certificate_get_peers = _library.gnutls_certificate_get_peers

713

certificate_get_peers.argtypes = [session_t,

714

ctypes.POINTER(ctypes.c_uint)]

715

certificate_get_peers.restype = ctypes.POINTER(datum_t)

716

717

global_set_log_level = _library.gnutls_global_set_log_level

718

global_set_log_level.argtypes = [ctypes.c_int]

719

global_set_log_level.restype = None

720

721

global_set_log_function = _library.gnutls_global_set_log_function

722

global_set_log_function.argtypes = [log_func]

723

global_set_log_function.restype = None

724

725

deinit = _library.gnutls_deinit

726

deinit.argtypes = [session_t]

727

deinit.restype = None

728

729

handshake = _library.gnutls_handshake

730

handshake.argtypes = [session_t]

731

handshake.restype = _error_code

732

handshake.errcheck = _retry_on_error

733

734

transport_set_ptr = _library.gnutls_transport_set_ptr

735

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

736

transport_set_ptr.restype = None

737

738

bye = _library.gnutls_bye

739

bye.argtypes = [session_t, close_request_t]

740

bye.restype = _error_code

741

bye.errcheck = _retry_on_error

742

743

check_version = _library.gnutls_check_version

744

check_version.argtypes = [ctypes.c_char_p]

745

check_version.restype = ctypes.c_char_p

746

747

has_rawpk = bool(check_version(_tls_rawpk_version))

748

749

if has_rawpk:

750

# Types

751

class pubkey_st(ctypes.Structure):

752

_fields = []

753

pubkey_t = ctypes.POINTER(pubkey_st)

754

755

x509_crt_fmt_t = ctypes.c_int

756

757

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

758

pubkey_init = _library.gnutls_pubkey_init

759

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

760

pubkey_init.restype = _error_code

761

762

pubkey_import = _library.gnutls_pubkey_import

763

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

764

x509_crt_fmt_t]

765

pubkey_import.restype = _error_code

766

767

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

768

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

769

ctypes.POINTER(ctypes.c_ubyte),

770

ctypes.POINTER(ctypes.c_size_t)]

771

pubkey_get_key_id.restype = _error_code

772

773

pubkey_deinit = _library.gnutls_pubkey_deinit

774

pubkey_deinit.argtypes = [pubkey_t]

775

pubkey_deinit.restype = None

776

else:

777

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

778

779

openpgp_crt_init = _library.gnutls_openpgp_crt_init

780

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

781

openpgp_crt_init.restype = _error_code

782

783

openpgp_crt_import = _library.gnutls_openpgp_crt_import

784

openpgp_crt_import.argtypes = [openpgp_crt_t,

785

ctypes.POINTER(datum_t),

786

openpgp_crt_fmt_t]

787

openpgp_crt_import.restype = _error_code

788

789

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

790

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

791

ctypes.POINTER(ctypes.c_uint)]

792

openpgp_crt_verify_self.restype = _error_code

793

794

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

795

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

796

openpgp_crt_deinit.restype = None

797

798

openpgp_crt_get_fingerprint = (

799

_library.gnutls_openpgp_crt_get_fingerprint)

800

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

801

ctypes.c_void_p,

802

ctypes.POINTER(

803

ctypes.c_size_t)]

804

openpgp_crt_get_fingerprint.restype = _error_code

805

806

if check_version("3.6.4"):

807

certificate_type_get2 = _library.gnutls_certificate_type_get2

808

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

809

certificate_type_get2.restype = _error_code

810

811

# Remove non-public functions

812

del _error_code, _retry_on_error

813

# Create the global "gnutls" object, simulating a module

814

gnutls = GnuTLS()

815

816

817

def call_pipe(connection, # : multiprocessing.Connection

818

func, *args, **kwargs):

819

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

820

821

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

822

return value on the provided multiprocessing.Connection.

823

"""

824

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

825

connection.close()

826

827

410

828

class Client(object):

411

829

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

412

830

413

831

Attributes:

414

832

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

415

833

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

417

835

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

418

836

to see if the client lives.

419

837

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

838

checker_callback_tag: a GLib event source tag, or None

421

839

checker_command: string; External command which is run to check

422

840

if client lives. %() expansions are done at

423

841

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

424

842

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

425

checker_initiator_tag: a gobject event source tag, or None

843

checker_initiator_tag: a GLib event source tag, or None

426

844

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

427

845

client_structure: Object describing what attributes a client has

428

846

and is used for storing the client at exit

429

847

current_checker_command: string; current running checker_command

430

disable_initiator_tag: a gobject event source tag, or None

848

disable_initiator_tag: a GLib event source tag, or None

431

849

enabled: bool()

432

850

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

433

uniquely identify the client

851

uniquely identify an OpenPGP client

852

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

853

a client using raw public keys

434

854

host: string; available for use by the checker command

435

855

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

436

856

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

438

858

last_checker_status: integer between 0 and 255 reflecting exit

439

859

status of last checker. -1 reflects crashed

440

860

checker, -2 means no checker completed yet.

861

last_checker_signal: The signal which killed the last checker, if

862

last_checker_status is -1

441

863

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

442

864

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

443

865

D-Bus identifiers

450

872

disabled, or None

451

873

server_settings: The server_settings dict from main()

452

874

"""

453

875

454

876

runtime_expansions = ("approval_delay", "approval_duration",

455

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

877

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

456

878

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

457

879

"last_approval_request", "last_checked_ok",

458

880

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

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

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

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

469

881

client_defaults = {

882

"timeout": "PT5M",

883

"extended_timeout": "PT15M",

884

"interval": "PT2M",

885

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

886

"host": "",

887

"approval_delay": "PT0S",

888

"approval_duration": "PT1S",

889

"approved_by_default": "True",

890

"enabled": "True",

891

}

892

470

893

@staticmethod

471

894

def config_parser(config):

472

895

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

479

902

for client_name in config.sections():

480

903

section = dict(config.items(client_name))

481

904

client = settings[client_name] = {}

482

905

483

906

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

484

907

# Reformat values from string types to Python types

485

908

client["approved_by_default"] = config.getboolean(

486

909

client_name, "approved_by_default")

487

910

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

488

911

"enabled")

489

490

# Uppercase and remove spaces from fingerprint for later

491

# comparison purposes with return value from the

492

# fingerprint() function

912

913

# Uppercase and remove spaces from key_id and fingerprint

914

# for later comparison purposes with return value from the

915

# key_id() and fingerprint() functions

916

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

917

.replace(" ", ""))

493

918

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

494

919

.replace(" ", ""))

495

920

if "secret" in section:

496

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

921

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

922

.encode("utf-8"),

923

"base64")

497

924

elif "secfile" in section:

498

925

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

499

926

(section["secfile"])),

514

941

client["last_approval_request"] = None

515

942

client["last_checked_ok"] = None

516

943

client["last_checker_status"] = -2

517

944

518

945

return settings

519

520

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

946

947

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

521

948

self.name = name

522

949

if server_settings is None:

523

950

server_settings = {}

525

952

# adding all client settings

526

953

for setting, value in settings.items():

527

954

setattr(self, setting, value)

528

955

529

956

if self.enabled:

530

957

if not hasattr(self, "last_enabled"):

531

958

self.last_enabled = datetime.datetime.utcnow()

535

962

else:

536

963

self.last_enabled = None

537

964

self.expires = None

538

965

539

966

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

967

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

540

968

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

541

969

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

542

970

datetime.datetime.utcnow())

543

971

544

972

# attributes specific for this server instance

545

973

self.checker = None

546

974

self.checker_initiator_tag = None

549

977

self.current_checker_command = None

550

978

self.approved = None

551

979

self.approvals_pending = 0

552

self.changedstate = (multiprocessing_manager

553

.Condition(multiprocessing_manager

554

.Lock()))

555

self.client_structure = [attr for attr in

556

self.__dict__.iterkeys()

980

self.changedstate = multiprocessing_manager.Condition(

981

multiprocessing_manager.Lock())

982

self.client_structure = [attr

983

for attr in self.__dict__.keys()

557

984

if not attr.startswith("_")]

558

985

self.client_structure.append("client_structure")

559

560

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

561

lambda obj:

562

isinstance(obj,

563

property)):

986

987

for name, t in inspect.getmembers(

988

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

564

989

if not name.startswith("_"):

565

990

self.client_structure.append(name)

566

991

567

992

# Send notice to process children that client state has changed

568

993

def send_changedstate(self):

569

994

with self.changedstate:

570

995

self.changedstate.notify_all()

571

996

572

997

def enable(self):

573

998

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

574

999

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

579

1004

self.last_enabled = datetime.datetime.utcnow()

580

1005

self.init_checker()

581

1006

self.send_changedstate()

582

1007

583

1008

def disable(self, quiet=True):

584

1009

"""Disable this client."""

585

1010

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

587

1012

if not quiet:

588

1013

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

589

1014

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

590

gobject.source_remove(self.disable_initiator_tag)

1015

GLib.source_remove(self.disable_initiator_tag)

591

1016

self.disable_initiator_tag = None

592

1017

self.expires = None

593

1018

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

594

gobject.source_remove(self.checker_initiator_tag)

1019

GLib.source_remove(self.checker_initiator_tag)

595

1020

self.checker_initiator_tag = None

596

1021

self.stop_checker()

597

1022

self.enabled = False

598

1023

if not quiet:

599

1024

self.send_changedstate()

600

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

1025

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

601

1026

return False

602

1027

603

1028

def __del__(self):

604

1029

self.disable()

605

1030

606

1031

def init_checker(self):

607

1032

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

608

1033

# and every interval from then on.

609

1034

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

614

self.start_checker))

1035

GLib.source_remove(self.checker_initiator_tag)

1036

self.checker_initiator_tag = GLib.timeout_add(

1037

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

1038

self.start_checker)

615

1039

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

616

1040

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

1041

GLib.source_remove(self.disable_initiator_tag)

1042

self.disable_initiator_tag = GLib.timeout_add(

1043

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

622

1044

# Also start a new checker *right now*.

623

1045

self.start_checker()

624

625

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

1046

1047

def checker_callback(self, source, condition, connection,

1048

command):

626

1049

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

627

1050

self.checker_callback_tag = None

628

1051

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1052

# Read return code from connection (see call_pipe)

1053

returncode = connection.recv()

1054

connection.close()

1055

1056

if returncode >= 0:

1057

self.last_checker_status = returncode

1058

self.last_checker_signal = None

631

1059

if self.last_checker_status == 0:

632

1060

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

633

1061

vars(self))

634

1062

self.checked_ok()

635

1063

else:

636

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

637

vars(self))

1064

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

638

1065

else:

639

1066

self.last_checker_status = -1

1067

self.last_checker_signal = -returncode

640

1068

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

641

1069

vars(self))

642

1070

return False

1071

643

1072

def checked_ok(self):

644

1073

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

645

1074

self.last_checked_ok = datetime.datetime.utcnow()

646

1075

self.last_checker_status = 0

1076

self.last_checker_signal = None

647

1077

self.bump_timeout()

648

1078

649

1079

def bump_timeout(self, timeout=None):

650

1080

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

651

1081

if timeout is None:

652

1082

timeout = self.timeout

653

1083

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

1084

GLib.source_remove(self.disable_initiator_tag)

655

1085

self.disable_initiator_tag = None

656

1086

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

1087

self.disable_initiator_tag = GLib.timeout_add(

1088

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

660

1089

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

661

1090

662

1091

def need_approval(self):

663

1092

self.last_approval_request = datetime.datetime.utcnow()

664

1093

665

1094

def start_checker(self):

666

1095

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

667

1096

668

1097

If a checker already exists, leave it running and do

669

1098

nothing."""

670

1099

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

675

1104

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

676

1105

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

677

1106

# should be.

678

679

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

680

try:

681

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

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

1107

1108

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

1109

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

1110

self.checker.join()

1111

self.checker = None

693

1112

# Start a new checker if needed

694

1113

if self.checker is None:

695

1114

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

1115

escaped_attrs = {

1116

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

1117

for attr in self.runtime_expansions}

699

1118

try:

700

1119

command = self.checker_command % escaped_attrs

701

1120

except TypeError as error:

702

1121

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

1122

self.checker_command,

1123

exc_info=error)

1124

return True # Try again later

705

1125

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

721

self.checker = subprocess.Popen(command,

722

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

736

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

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

747

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

1126

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

1127

self.name)

1128

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

1129

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

1130

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

1131

# always replaced by /dev/null.)

1132

# The exception is when not debugging but nevertheless

1133

# running in the foreground; use the previously

1134

# created wnull.

1135

popen_args = {"close_fds": True,

1136

"shell": True,

1137

"cwd": "/"}

1138

if (not self.server_settings["debug"]

1139

and self.server_settings["foreground"]):

1140

popen_args.update({"stdout": wnull,

1141

"stderr": wnull})

1142

pipe = multiprocessing.Pipe(duplex=False)

1143

self.checker = multiprocessing.Process(

1144

target=call_pipe,

1145

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

1146

kwargs=popen_args)

1147

self.checker.start()

1148

self.checker_callback_tag = GLib.io_add_watch(

1149

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

1150

self.checker_callback, pipe[0], command)

1151

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

748

1152

return True

749

1153

750

1154

def stop_checker(self):

751

1155

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

752

1156

if self.checker_callback_tag:

753

gobject.source_remove(self.checker_callback_tag)

1157

GLib.source_remove(self.checker_callback_tag)

754

1158

self.checker_callback_tag = None

755

1159

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

756

1160

return

757

1161

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

758

try:

759

self.checker.terminate()

760

#time.sleep(0.5)

761

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

762

# self.checker.kill()

763

except OSError as error:

764

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

765

raise

1162

self.checker.terminate()

766

1163

self.checker = None

767

1164

768

1165

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

1166

def dbus_service_property(dbus_interface,

1167

signature="v",

1168

access="readwrite",

1169

byte_arrays=False):

771

1170

"""Decorators for marking methods of a DBusObjectWithProperties to

772

1171

become properties on the D-Bus.

773

1172

774

1173

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

775

1174

and with one argument by "Set".

776

1175

777

1176

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

778

1177

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

779

1178

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

783

1182

if byte_arrays and signature != "ay":

784

1183

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

785

1184

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

1185

786

1186

def decorator(func):

787

1187

func._dbus_is_property = True

788

1188

func._dbus_interface = dbus_interface

791

1191

func._dbus_name = func.__name__

792

1192

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

793

1193

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

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

795

1195

return func

1196

796

1197

return decorator

797

1198

798

1199

799

1200

def dbus_interface_annotations(dbus_interface):

800

1201

"""Decorator for marking functions returning interface annotations

801

1202

802

1203

Usage:

803

1204

804

1205

@dbus_interface_annotations("org.example.Interface")

805

1206

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

806

1207

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

807

1208

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

808

1209

"false"}

809

1210

"""

1211

810

1212

def decorator(func):

811

1213

func._dbus_is_interface = True

812

1214

func._dbus_interface = dbus_interface

813

1215

func._dbus_name = dbus_interface

814

1216

return func

1217

815

1218

return decorator

816

1219

817

1220

818

1221

def dbus_annotations(annotations):

819

1222

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

820

1223

Usage:

821

1224

822

1225

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

823

1226

"org.freedesktop.DBus.Property."

824

1227

"EmitsChangedSignal": "false"})

826

1229

access="r")

827

1230

def Property_dbus_property(self):

828

1231

return dbus.Boolean(False)

1232

1233

See also the DBusObjectWithAnnotations class.

829

1234

"""

1235

830

1236

def decorator(func):

831

1237

func._dbus_annotations = annotations

832

1238

return func

1239

833

1240

return decorator

834

1241

835

1242

838

1245

"""

839

1246

pass

840

1247

1248

841

1249

class DBusPropertyAccessException(DBusPropertyException):

842

1250

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

843

1251

"""

850

1258

pass

851

1259

852

1260

853

class DBusObjectWithProperties(dbus.service.Object):

854

"""A D-Bus object with properties.

855

856

Classes inheriting from this can use the dbus_service_property

857

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

858

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

1261

class DBusObjectWithAnnotations(dbus.service.Object):

1262

"""A D-Bus object with annotations.

1263

1264

Classes inheriting from this can use the dbus_annotations

1265

decorator to add annotations to methods or signals.

859

1266

"""

860

1267

861

1268

@staticmethod

862

1269

def _is_dbus_thing(thing):

863

1270

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

864

1271

865

1272

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

866

1273

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

867

1274

"""

868

1275

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

869

1276

False)

870

1277

871

1278

def _get_all_dbus_things(self, thing):

872

1279

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

873

1280

"""

874

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

875

name),

1281

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

876

1282

athing.__get__(self))

877

1283

for cls in self.__class__.__mro__

878

1284

for name, athing in

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

881

1285

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

1286

1287

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1288

out_signature="s",

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1291

def Introspect(self, object_path, connection):

1292

"""Overloading of standard D-Bus method.

1293

1294

Inserts annotation tags on methods and signals.

1295

"""

1296

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

1297

connection)

1298

try:

1299

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

1300

1301

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

1302

# Add annotation tags

1303

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

1304

for tag in if_tag.getElementsByTagName(typ):

1305

annots = dict()

1306

for name, prop in (self.

1307

_get_all_dbus_things(typ)):

1308

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

1309

and prop._dbus_interface

1310

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

1311

annots.update(getattr(

1312

prop, "_dbus_annotations", {}))

1313

for name, value in annots.items():

1314

ann_tag = document.createElement(

1315

"annotation")

1316

ann_tag.setAttribute("name", name)

1317

ann_tag.setAttribute("value", value)

1318

tag.appendChild(ann_tag)

1319

# Add interface annotation tags

1320

for annotation, value in dict(

1321

itertools.chain.from_iterable(

1322

annotations().items()

1323

for name, annotations

1324

in self._get_all_dbus_things("interface")

1325

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

1326

)).items():

1327

ann_tag = document.createElement("annotation")

1328

ann_tag.setAttribute("name", annotation)

1329

ann_tag.setAttribute("value", value)

1330

if_tag.appendChild(ann_tag)

1331

# Fix argument name for the Introspect method itself

1332

if (if_tag.getAttribute("name")

1333

== dbus.INTROSPECTABLE_IFACE):

1334

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

1335

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

1336

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

1337

if (arg.getAttribute("direction")

1338

== "out"):

1339

arg.setAttribute("name",

1340

"xml_data")

1341

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

1342

document.unlink()

1343

except (AttributeError, xml.dom.DOMException,

1344

xml.parsers.expat.ExpatError) as error:

1345

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

1346

exc_info=error)

1347

return xmlstring

1348

1349

1350

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1351

"""A D-Bus object with properties.

1352

1353

Classes inheriting from this can use the dbus_service_property

1354

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

1355

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

1356

"""

1357

882

1358

def _get_dbus_property(self, interface_name, property_name):

883

1359

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

884

1360

property with the specified name and interface.

885

1361

"""

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

1362

for cls in self.__class__.__mro__:

1363

for name, value in inspect.getmembers(

1364

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

890

1365

if (value._dbus_name == property_name

891

1366

and value._dbus_interface == interface_name):

892

1367

return value.__get__(self)

893

1368

894

1369

# No such property

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

898

899

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

1370

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

1371

self.dbus_object_path, interface_name, property_name))

1372

1373

@classmethod

1374

def _get_all_interface_names(cls):

1375

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

1376

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

1377

"_dbus_interface", None)

1378

for x in (inspect.getmro(cls))

1379

for attr in dir(x))

1380

if name is not None)

1381

1382

@dbus.service.method(dbus.PROPERTIES_IFACE,

1383

in_signature="ss",

900

1384

out_signature="v")

901

1385

def Get(self, interface_name, property_name):

902

1386

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

908

1392

if not hasattr(value, "variant_level"):

909

1393

return value

910

1394

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

911

1395

912

1396

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

913

1397

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

914

1398

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

926

1410

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

927

1411

for byte in value))

928

1412

prop(value)

929

930

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

1413

1414

@dbus.service.method(dbus.PROPERTIES_IFACE,

1415

in_signature="s",

931

1416

out_signature="a{sv}")

932

1417

def GetAll(self, interface_name):

933

1418

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

934

1419

standard.

935

1420

936

1421

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

937

1422

"""

938

1423

properties = {}

948

1433

if not hasattr(value, "variant_level"):

949

1434

properties[name] = value

950

1435

continue

951

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

952

value.variant_level+1)

1436

properties[name] = type(value)(

1437

value, variant_level=value.variant_level + 1)

953

1438

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

954

1439

955

1440

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

956

1441

def PropertiesChanged(self, interface_name, changed_properties,

957

1442

invalidated_properties):

959

1444

standard.

960

1445

"""

961

1446

pass

962

1447

963

1448

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

964

1449

out_signature="s",

965

1450

path_keyword='object_path',

966

1451

connection_keyword='connection')

967

1452

def Introspect(self, object_path, connection):

968

1453

"""Overloading of standard D-Bus method.

969

1454

970

1455

Inserts property tags and interface annotation tags.

971

1456

"""

972

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

973

connection)

1457

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1458

object_path,

1459

connection)

974

1460

try:

975

1461

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

1462

976

1463

def make_tag(document, name, prop):

977

1464

e = document.createElement("property")

978

1465

e.setAttribute("name", name)

979

1466

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

980

1467

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

981

1468

return e

1469

982

1470

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

983

1471

# Add property tags

984

1472

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

987

1475

if prop._dbus_interface

988

1476

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

989

1477

if_tag.appendChild(tag)

990

# Add annotation tags

991

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

992

for tag in if_tag.getElementsByTagName(typ):

993

annots = dict()

994

for name, prop in (self.

995

_get_all_dbus_things(typ)):

996

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

997

and prop._dbus_interface

998

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

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1003

for name, value in annots.items():

1004

ann_tag = document.createElement(

1005

"annotation")

1006

ann_tag.setAttribute("name", name)

1007

ann_tag.setAttribute("value", value)

1008

tag.appendChild(ann_tag)

1009

# Add interface annotation tags

1010

for annotation, value in dict(

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

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

1016

)).items():

1017

ann_tag = document.createElement("annotation")

1018

ann_tag.setAttribute("name", annotation)

1019

ann_tag.setAttribute("value", value)

1020

if_tag.appendChild(ann_tag)

1478

# Add annotation tags for properties

1479

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

1480

annots = dict()

1481

for name, prop in self._get_all_dbus_things(

1482

"property"):

1483

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

1484

and prop._dbus_interface

1485

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

1486

annots.update(getattr(

1487

prop, "_dbus_annotations", {}))

1488

for name, value in annots.items():

1489

ann_tag = document.createElement(

1490

"annotation")

1491

ann_tag.setAttribute("name", name)

1492

ann_tag.setAttribute("value", value)

1493

tag.appendChild(ann_tag)

1021

1494

# Add the names to the return values for the

1022

1495

# "org.freedesktop.DBus.Properties" methods

1023

1496

if (if_tag.getAttribute("name")

1042

1515

return xmlstring

1043

1516

1044

1517

1518

try:

1519

dbus.OBJECT_MANAGER_IFACE

1520

except AttributeError:

1521

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

1522

1523

1524

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1525

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

1526

1527

Classes inheriting from this exposes the standard

1528

GetManagedObjects call and the InterfacesAdded and

1529

InterfacesRemoved signals on the standard

1530

"org.freedesktop.DBus.ObjectManager" interface.

1531

1532

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

1533

manually.

1534

"""

1535

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def GetManagedObjects(self):

1538

"""This function must be overridden"""

1539

raise NotImplementedError()

1540

1541

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1542

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

1543

def InterfacesAdded(self, object_path, interfaces_and_properties):

1544

pass

1545

1546

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

1547

def InterfacesRemoved(self, object_path, interfaces):

1548

pass

1549

1550

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1551

out_signature="s",

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1554

def Introspect(self, object_path, connection):

1555

"""Overloading of standard D-Bus method.

1556

1557

Override return argument name of GetManagedObjects to be

1558

"objpath_interfaces_and_properties"

1559

"""

1560

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1561

object_path,

1562

connection)

1563

try:

1564

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

1565

1566

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

1567

# Fix argument name for the GetManagedObjects method

1568

if (if_tag.getAttribute("name")

1569

== dbus.OBJECT_MANAGER_IFACE):

1570

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

1571

if (cn.getAttribute("name")

1572

== "GetManagedObjects"):

1573

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

1574

if (arg.getAttribute("direction")

1575

== "out"):

1576

arg.setAttribute(

1577

"name",

1578

"objpath_interfaces"

1579

"_and_properties")

1580

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

1581

document.unlink()

1582

except (AttributeError, xml.dom.DOMException,

1583

xml.parsers.expat.ExpatError) as error:

1584

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

1585

exc_info=error)

1586

return xmlstring

1587

1588

1045

1589

def datetime_to_dbus(dt, variant_level=0):

1046

1590

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

1047

1591

if dt is None:

1048

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1592

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

1593

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

1051

1594

1052

1595

1053

1596

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1055

1598

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

1056

1599

interface names according to the "alt_interface_names" mapping.

1057

1600

Usage:

1058

1601

1059

1602

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

1060

1603

"net.example.AlternateInterface"})

1061

1604

class SampleDBusObject(dbus.service.Object):

1062

1605

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

1063

1606

def SampleDBusMethod():

1064

1607

pass

1065

1608

1066

1609

The above "SampleDBusMethod" on "SampleDBusObject" will be

1067

1610

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

1068

1611

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

1069

1612

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

1070

1613

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

1071

1614

1072

1615

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

1073

1616

(from DBusObjectWithProperties) and interfaces (from the

1074

1617

dbus_interface_annotations decorator).

1075

1618

"""

1619

1076

1620

def wrapper(cls):

1077

1621

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1622

alt_interface_names.items()):

1079

1623

attr = {}

1080

1624

interface_names = set()

1081

1625

# Go though all attributes of the class

1083

1627

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

1084

1628

# with the wrong interface name

1085

1629

if (not hasattr(attribute, "_dbus_interface")

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1630

or not attribute._dbus_interface.startswith(

1631

orig_interface_name)):

1088

1632

continue

1089

1633

# Create an alternate D-Bus interface name based on

1090

1634

# the current name

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1635

alt_interface = attribute._dbus_interface.replace(

1636

orig_interface_name, alt_interface_name)

1094

1637

interface_names.add(alt_interface)

1095

1638

# Is this a D-Bus signal?

1096

1639

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

1097

1640

# Extract the original non-method undecorated

1098

1641

# function by black magic

1099

nonmethod_func = (dict(

1642

if sys.version_info.major == 2:

1643

nonmethod_func = (dict(

1100

1644

zip(attribute.func_code.co_freevars,

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1645

attribute.__closure__))

1646

["func"].cell_contents)

1647

else:

1648

nonmethod_func = (dict(

1649

zip(attribute.__code__.co_freevars,

1650

attribute.__closure__))

1651

["func"].cell_contents)

1103

1652

# Create a new, but exactly alike, function

1104

1653

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

1105

1654

# with the alternate D-Bus interface name

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1109

(types.FunctionType(

1110

nonmethod_func.func_code,

1111

nonmethod_func.func_globals,

1112

nonmethod_func.func_name,

1113

nonmethod_func.func_defaults,

1114

nonmethod_func.func_closure)))

1655

new_function = copy_function(nonmethod_func)

1656

new_function = (dbus.service.signal(

1657

alt_interface,

1658

attribute._dbus_signature)(new_function))

1115

1659

# Copy annotations, if any

1116

1660

try:

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1661

new_function._dbus_annotations = dict(

1662

attribute._dbus_annotations)

1119

1663

except AttributeError:

1120

1664

pass

1665

1121

1666

# Define a creator of a function to call both the

1122

1667

# original and alternate functions, so both the

1123

1668

# original and alternate signals gets sent when

1126

1671

"""This function is a scope container to pass

1127

1672

func1 and func2 to the "call_both" function

1128

1673

outside of its arguments"""

1674

1675

@functools.wraps(func2)

1129

1676

def call_both(*args, **kwargs):

1130

1677

"""This function will emit two D-Bus

1131

1678

signals by calling func1 and func2"""

1132

1679

func1(*args, **kwargs)

1133

1680

func2(*args, **kwargs)

1681

# Make wrapper function look like a D-Bus

1682

# signal

1683

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

1684

if name.startswith("_dbus_"):

1685

setattr(call_both, name, attr)

1686

1134

1687

return call_both

1135

1688

# Create the "call_both" function and add it to

1136

1689

# the class

1141

1694

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

1142

1695

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

1143

1696

# to the class.

1144

attr[attrname] = (dbus.service.method

1145

(alt_interface,

1146

attribute._dbus_in_signature,

1147

attribute._dbus_out_signature)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1697

attr[attrname] = (

1698

dbus.service.method(

1699

alt_interface,

1700

attribute._dbus_in_signature,

1701

attribute._dbus_out_signature)

1702

(copy_function(attribute)))

1154

1703

# Copy annotations, if any

1155

1704

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1705

attr[attrname]._dbus_annotations = dict(

1706

attribute._dbus_annotations)

1158

1707

except AttributeError:

1159

1708

pass

1160

1709

# Is this a D-Bus property?

1163

1712

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

1164

1713

# property with the alternate D-Bus interface

1165

1714

# name. Add it to the class.

1166

attr[attrname] = (dbus_service_property

1167

(alt_interface,

1168

attribute._dbus_signature,

1169

attribute._dbus_access,

1170

attribute

1171

._dbus_get_args_options

1172

["byte_arrays"])

1173

(types.FunctionType

1174

(attribute.func_code,

1175

attribute.func_globals,

1176

attribute.func_name,

1177

attribute.func_defaults,

1178

attribute.func_closure)))

1715

attr[attrname] = (dbus_service_property(

1716

alt_interface, attribute._dbus_signature,

1717

attribute._dbus_access,

1718

attribute._dbus_get_args_options

1719

["byte_arrays"])

1720

(copy_function(attribute)))

1179

1721

# Copy annotations, if any

1180

1722

try:

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1723

attr[attrname]._dbus_annotations = dict(

1724

attribute._dbus_annotations)

1183

1725

except AttributeError:

1184

1726

pass

1185

1727

# Is this a D-Bus interface?

1188

1730

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

1189

1731

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

1190

1732

# to the class.

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1733

attr[attrname] = (

1734

dbus_interface_annotations(alt_interface)

1735

(copy_function(attribute)))

1199

1736

if deprecate:

1200

1737

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1738

iname = "_AlternateDBusNames_interface_annotation{}"

1202

1739

for interface_name in interface_names:

1740

1203

1741

@dbus_interface_annotations(interface_name)

1204

1742

def func(self):

1205

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

1206

"true" }

1743

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

1744

"true"}

1207

1745

# Find an unused name

1208

1746

for aname in (iname.format(i)

1209

1747

for i in itertools.count()):

1213

1751

if interface_names:

1214

1752

# Replace the class with a new subclass of it with

1215

1753

# methods, signals, etc. as created above.

1216

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

1217

(cls,), attr)

1754

if sys.version_info.major == 2:

1755

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

1756

(cls, ), attr)

1757

else:

1758

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

1759

(cls, ), attr)

1218

1760

return cls

1761

1219

1762

return wrapper

1220

1763

1221

1764

1222

1765

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

1223

"se.bsnet.fukt.Mandos"})

1766

"se.bsnet.fukt.Mandos"})

1224

1767

class ClientDBus(Client, DBusObjectWithProperties):

1225

1768

"""A Client class using D-Bus

1226

1769

1227

1770

Attributes:

1228

1771

dbus_object_path: dbus.ObjectPath

1229

1772

bus: dbus.SystemBus()

1230

1773

"""

1231

1774

1232

1775

runtime_expansions = (Client.runtime_expansions

1233

+ ("dbus_object_path",))

1234

1776

+ ("dbus_object_path", ))

1777

1235

1778

_interface = "se.recompile.Mandos.Client"

1236

1779

1237

1780

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

1238

1239

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

1781

1782

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

1240

1783

self.bus = bus

1241

1784

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

1242

1785

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

1244

1787

client_object_name = str(self.name).translate(

1245

1788

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

1246

1789

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

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1790

self.dbus_object_path = dbus.ObjectPath(

1791

"/clients/" + client_object_name)

1249

1792

DBusObjectWithProperties.__init__(self, self.bus,

1250

1793

self.dbus_object_path)

1251

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1794

1795

def notifychangeproperty(transform_func, dbus_name,

1796

type_func=lambda x: x,

1797

variant_level=1,

1798

invalidate_only=False,

1255

1799

_interface=_interface):

1256

1800

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

1257

1801

its changes to DBus.

1258

1802

1259

1803

transform_fun: Function that takes a value and a variant_level

1260

1804

and transforms it to a D-Bus type.

1261

1805

dbus_name: D-Bus name of the variable

1264

1808

variant_level: D-Bus variant level. Default: 1

1265

1809

"""

1266

1810

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

1811

1267

1812

def setter(self, value):

1268

1813

if hasattr(self, "dbus_object_path"):

1269

1814

if (not hasattr(self, attrname) or

1270

1815

type_func(getattr(self, attrname, None))

1271

1816

!= type_func(value)):

1272

1817

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1818

self.PropertiesChanged(

1819

_interface, dbus.Dictionary(),

1820

dbus.Array((dbus_name, )))

1277

1821

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1822

dbus_value = transform_func(

1823

type_func(value),

1824

variant_level=variant_level)

1281

1825

self.PropertyChanged(dbus.String(dbus_name),

1282

1826

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1827

self.PropertiesChanged(

1828

_interface,

1829

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

1830

dbus_value}),

1831

dbus.Array())

1287

1832

setattr(self, attrname, value)

1288

1833

1289

1834

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

1290

1835

1291

1836

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1292

1837

approvals_pending = notifychangeproperty(dbus.Boolean,

1293

1838

"ApprovalPending",

1294

type_func = bool)

1839

type_func=bool)

1295

1840

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

1296

1841

last_enabled = notifychangeproperty(datetime_to_dbus,

1297

1842

"LastEnabled")

1298

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

1299

type_func = lambda checker:

1300

checker is not None)

1843

checker = notifychangeproperty(

1844

dbus.Boolean, "CheckerRunning",

1845

type_func=lambda checker: checker is not None)

1301

1846

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1302

1847

"LastCheckedOK")

1303

1848

last_checker_status = notifychangeproperty(dbus.Int16,

1306

1851

datetime_to_dbus, "LastApprovalRequest")

1307

1852

approved_by_default = notifychangeproperty(dbus.Boolean,

1308

1853

"ApprovedByDefault")

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1854

approval_delay = notifychangeproperty(

1855

dbus.UInt64, "ApprovalDelay",

1856

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

1314

1857

approval_duration = notifychangeproperty(

1315

1858

dbus.UInt64, "ApprovalDuration",

1316

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

1859

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

1317

1860

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1861

timeout = notifychangeproperty(

1862

dbus.UInt64, "Timeout",

1863

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

1321

1864

extended_timeout = notifychangeproperty(

1322

1865

dbus.UInt64, "ExtendedTimeout",

1323

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

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1866

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

1867

interval = notifychangeproperty(

1868

dbus.UInt64, "Interval",

1869

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

1329

1870

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

1330

1871

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

1331

1872

invalidate_only=True)

1332

1873

1333

1874

del notifychangeproperty

1334

1875

1335

1876

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

1336

1877

try:

1337

1878

self.remove_from_connection()

1340

1881

if hasattr(DBusObjectWithProperties, "__del__"):

1341

1882

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

1342

1883

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

1343

1344

def checker_callback(self, pid, condition, command,

1345

*args, **kwargs):

1346

self.checker_callback_tag = None

1347

self.checker = None

1348

if os.WIFEXITED(condition):

1349

exitstatus = os.WEXITSTATUS(condition)

1884

1885

def checker_callback(self, source, condition,

1886

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

1887

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

1888

connection, command, *args,

1889

**kwargs)

1890

exitstatus = self.last_checker_status

1891

if exitstatus >= 0:

1350

1892

# Emit D-Bus signal

1351

1893

self.CheckerCompleted(dbus.Int16(exitstatus),

1352

dbus.Int64(condition),

1894

# This is specific to GNU libC

1895

dbus.Int64(exitstatus << 8),

1353

1896

dbus.String(command))

1354

1897

else:

1355

1898

# Emit D-Bus signal

1356

1899

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

1357

dbus.Int64(condition),

1900

dbus.Int64(

1901

# This is specific to GNU libC

1902

(exitstatus << 8)

1903

| self.last_checker_signal),

1358

1904

dbus.String(command))

1359

1360

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

1361

*args, **kwargs)

1362

1905

return ret

1906

1363

1907

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

1364

1908

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

1365

1909

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

1369

1913

# Emit D-Bus signal

1370

1914

self.CheckerStarted(self.current_checker_command)

1371

1915

return r

1372

1916

1373

1917

def _reset_approved(self):

1374

1918

self.approved = None

1375

1919

return False

1376

1920

1377

1921

def approve(self, value=True):

1378

1922

self.approved = value

1379

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

1380

* 1000), self._reset_approved)

1923

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

1924

* 1000), self._reset_approved)

1381

1925

self.send_changedstate()

1382

1383

## D-Bus methods, signals & properties

1384

1385

## Interfaces

1386

1387

## Signals

1388

1926

1927

# D-Bus methods, signals & properties

1928

1929

# Interfaces

1930

1931

# Signals

1932

1389

1933

# CheckerCompleted - signal

1390

1934

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

1391

1935

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

1392

1936

"D-Bus signal"

1393

1937

pass

1394

1938

1395

1939

# CheckerStarted - signal

1396

1940

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

1397

1941

def CheckerStarted(self, command):

1398

1942

"D-Bus signal"

1399

1943

pass

1400

1944

1401

1945

# PropertyChanged - signal

1402

1946

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

1403

1947

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

1404

1948

def PropertyChanged(self, property, value):

1405

1949

"D-Bus signal"

1406

1950

pass

1407

1951

1408

1952

# GotSecret - signal

1409

1953

@dbus.service.signal(_interface)

1410

1954

def GotSecret(self):

1413

1957

server to mandos-client

1414

1958

"""

1415

1959

pass

1416

1960

1417

1961

# Rejected - signal

1418

1962

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

1419

1963

def Rejected(self, reason):

1420

1964

"D-Bus signal"

1421

1965

pass

1422

1966

1423

1967

# NeedApproval - signal

1424

1968

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

1425

1969

def NeedApproval(self, timeout, default):

1426

1970

"D-Bus signal"

1427

1971

return self.need_approval()

1428

1429

## Methods

1430

1972

1973

# Methods

1974

1431

1975

# Approve - method

1432

1976

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

1433

1977

def Approve(self, value):

1434

1978

self.approve(value)

1435

1979

1436

1980

# CheckedOK - method

1437

1981

@dbus.service.method(_interface)

1438

1982

def CheckedOK(self):

1439

1983

self.checked_ok()

1440

1984

1441

1985

# Enable - method

1986

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

1442

1987

@dbus.service.method(_interface)

1443

1988

def Enable(self):

1444

1989

"D-Bus method"

1445

1990

self.enable()

1446

1991

1447

1992

# StartChecker - method

1993

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

1448

1994

@dbus.service.method(_interface)

1449

1995

def StartChecker(self):

1450

1996

"D-Bus method"

1451

1997

self.start_checker()

1452

1998

1453

1999

# Disable - method

2000

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

1454

2001

@dbus.service.method(_interface)

1455

2002

def Disable(self):

1456

2003

"D-Bus method"

1457

2004

self.disable()

1458

2005

1459

2006

# StopChecker - method

2007

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

1460

2008

@dbus.service.method(_interface)

1461

2009

def StopChecker(self):

1462

2010

self.stop_checker()

1463

1464

## Properties

1465

2011

2012

# Properties

2013

1466

2014

# ApprovalPending - property

1467

2015

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

1468

2016

def ApprovalPending_dbus_property(self):

1469

2017

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

1470

2018

1471

2019

# ApprovedByDefault - property

1472

@dbus_service_property(_interface, signature="b",

2020

@dbus_service_property(_interface,

2021

signature="b",

1473

2022

access="readwrite")

1474

2023

def ApprovedByDefault_dbus_property(self, value=None):

1475

2024

if value is None: # get

1476

2025

return dbus.Boolean(self.approved_by_default)

1477

2026

self.approved_by_default = bool(value)

1478

2027

1479

2028

# ApprovalDelay - property

1480

@dbus_service_property(_interface, signature="t",

2029

@dbus_service_property(_interface,

2030

signature="t",

1481

2031

access="readwrite")

1482

2032

def ApprovalDelay_dbus_property(self, value=None):

1483

2033

if value is None: # get

1484

2034

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

1485

2035

* 1000)

1486

2036

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

1487

2037

1488

2038

# ApprovalDuration - property

1489

@dbus_service_property(_interface, signature="t",

2039

@dbus_service_property(_interface,

2040

signature="t",

1490

2041

access="readwrite")

1491

2042

def ApprovalDuration_dbus_property(self, value=None):

1492

2043

if value is None: # get

1493

2044

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

1494

2045

* 1000)

1495

2046

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

1496

2047

1497

2048

# Name - property

2049

@dbus_annotations(

2050

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

1498

2051

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

1499

2052

def Name_dbus_property(self):

1500

2053

return dbus.String(self.name)

1501

2054

2055

# KeyID - property

2056

@dbus_annotations(

2057

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

2058

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

2059

def KeyID_dbus_property(self):

2060

return dbus.String(self.key_id)

2061

1502

2062

# Fingerprint - property

2063

@dbus_annotations(

2064

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

1503

2065

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

1504

2066

def Fingerprint_dbus_property(self):

1505

2067

return dbus.String(self.fingerprint)

1506

2068

1507

2069

# Host - property

1508

@dbus_service_property(_interface, signature="s",

2070

@dbus_service_property(_interface,

2071

signature="s",

1509

2072

access="readwrite")

1510

2073

def Host_dbus_property(self, value=None):

1511

2074

if value is None: # get

1512

2075

return dbus.String(self.host)

1513

2076

self.host = str(value)

1514

2077

1515

2078

# Created - property

2079

@dbus_annotations(

2080

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

1516

2081

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

1517

2082

def Created_dbus_property(self):

1518

2083

return datetime_to_dbus(self.created)

1519

2084

1520

2085

# LastEnabled - property

1521

2086

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

1522

2087

def LastEnabled_dbus_property(self):

1523

2088

return datetime_to_dbus(self.last_enabled)

1524

2089

1525

2090

# Enabled - property

1526

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1527

2093

access="readwrite")

1528

2094

def Enabled_dbus_property(self, value=None):

1529

2095

if value is None: # get

1532

2098

self.enable()

1533

2099

else:

1534

2100

self.disable()

1535

2101

1536

2102

# LastCheckedOK - property

1537

@dbus_service_property(_interface, signature="s",

2103

@dbus_service_property(_interface,

2104

signature="s",

1538

2105

access="readwrite")

1539

2106

def LastCheckedOK_dbus_property(self, value=None):

1540

2107

if value is not None:

1541

2108

self.checked_ok()

1542

2109

return

1543

2110

return datetime_to_dbus(self.last_checked_ok)

1544

2111

1545

2112

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

2113

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

1548

2114

def LastCheckerStatus_dbus_property(self):

1549

2115

return dbus.Int16(self.last_checker_status)

1550

2116

1551

2117

# Expires - property

1552

2118

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

1553

2119

def Expires_dbus_property(self):

1554

2120

return datetime_to_dbus(self.expires)

1555

2121

1556

2122

# LastApprovalRequest - property

1557

2123

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

1558

2124

def LastApprovalRequest_dbus_property(self):

1559

2125

return datetime_to_dbus(self.last_approval_request)

1560

2126

1561

2127

# Timeout - property

1562

@dbus_service_property(_interface, signature="t",

2128

@dbus_service_property(_interface,

2129

signature="t",

1563

2130

access="readwrite")

1564

2131

def Timeout_dbus_property(self, value=None):

1565

2132

if value is None: # get

1577

2144

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

1578

2145

is None):

1579

2146

return

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

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

1584

* 1000), self.disable))

1585

2147

GLib.source_remove(self.disable_initiator_tag)

2148

self.disable_initiator_tag = GLib.timeout_add(

2149

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

2150

self.disable)

2151

1586

2152

# ExtendedTimeout - property

1587

@dbus_service_property(_interface, signature="t",

2153

@dbus_service_property(_interface,

2154

signature="t",

1588

2155

access="readwrite")

1589

2156

def ExtendedTimeout_dbus_property(self, value=None):

1590

2157

if value is None: # get

1591

2158

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

1592

2159

* 1000)

1593

2160

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

1594

2161

1595

2162

# Interval - property

1596

@dbus_service_property(_interface, signature="t",

2163

@dbus_service_property(_interface,

2164

signature="t",

1597

2165

access="readwrite")

1598

2166

def Interval_dbus_property(self, value=None):

1599

2167

if value is None: # get

1603

2171

return

1604

2172

if self.enabled:

1605

2173

# Reschedule checker run

1606

gobject.source_remove(self.checker_initiator_tag)

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1610

2174

GLib.source_remove(self.checker_initiator_tag)

2175

self.checker_initiator_tag = GLib.timeout_add(

2176

value, self.start_checker)

2177

self.start_checker() # Start one now, too

2178

1611

2179

# Checker - property

1612

@dbus_service_property(_interface, signature="s",

2180

@dbus_service_property(_interface,

2181

signature="s",

1613

2182

access="readwrite")

1614

2183

def Checker_dbus_property(self, value=None):

1615

2184

if value is None: # get

1616

2185

return dbus.String(self.checker_command)

1617

2186

self.checker_command = str(value)

1618

2187

1619

2188

# CheckerRunning - property

1620

@dbus_service_property(_interface, signature="b",

2189

@dbus_service_property(_interface,

2190

signature="b",

1621

2191

access="readwrite")

1622

2192

def CheckerRunning_dbus_property(self, value=None):

1623

2193

if value is None: # get

1626

2196

self.start_checker()

1627

2197

else:

1628

2198

self.stop_checker()

1629

2199

1630

2200

# ObjectPath - property

2201

@dbus_annotations(

2202

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

2203

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

1631

2204

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

1632

2205

def ObjectPath_dbus_property(self):

1633

return self.dbus_object_path # is already a dbus.ObjectPath

1634

2206

return self.dbus_object_path # is already a dbus.ObjectPath

2207

1635

2208

# Secret = property

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

2209

@dbus_annotations(

2210

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

2211

"invalidates"})

2212

@dbus_service_property(_interface,

2213

signature="ay",

2214

access="write",

2215

byte_arrays=True)

1638

2216

def Secret_dbus_property(self, value):

1639

2217

self.secret = bytes(value)

1640

2218

1641

2219

del _interface

1642

2220

1643

2221

1644

2222

class ProxyClient(object):

1645

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

2223

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

1646

2224

self._pipe = child_pipe

1647

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

2225

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

1648

2226

if not self._pipe.recv():

1649

raise KeyError()

1650

2227

raise KeyError(key_id or fpr)

2228

1651

2229

def __getattribute__(self, name):

1652

2230

if name == '_pipe':

1653

2231

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

1656

2234

if data[0] == 'data':

1657

2235

return data[1]

1658

2236

if data[0] == 'function':

2237

1659

2238

def func(*args, **kwargs):

1660

2239

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

1661

2240

return self._pipe.recv()[1]

2241

1662

2242

return func

1663

2243

1664

2244

def __setattr__(self, name, value):

1665

2245

if name == '_pipe':

1666

2246

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

1669

2249

1670

2250

class ClientHandler(socketserver.BaseRequestHandler, object):

1671

2251

"""A class to handle client connections.

1672

2252

1673

2253

Instantiated once for each connection to handle it.

1674

2254

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

1675

2255

1676

2256

def handle(self):

1677

2257

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

1678

2258

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

1679

2259

str(self.client_address))

1680

2260

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

1681

2261

self.server.child_pipe.fileno())

1682

1683

session = (gnutls.connection

1684

.ClientSession(self.request,

1685

gnutls.connection

1686

.X509Credentials()))

1687

1688

# Note: gnutls.connection.X509Credentials is really a

1689

# generic GnuTLS certificate credentials object so long as

1690

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

1691

# here despite using OpenPGP certificates.

1692

1693

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

1694

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

1695

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

1696

# "+DHE-DSS"))

2262

2263

session = gnutls.ClientSession(self.request)

2264

2265

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

2266

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

2267

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

2268

# "+DHE-DSS"))

1697

2269

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

1698

2270

priority = self.server.gnutls_priority

1699

2271

if priority is None:

1700

2272

priority = "NORMAL"

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1704

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2276

1705

2277

# Start communication using the Mandos protocol

1706

2278

# Get protocol number

1707

2279

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

1712

2284

except (ValueError, IndexError, RuntimeError) as error:

1713

2285

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

1714

2286

return

1715

2287

1716

2288

# Start GnuTLS connection

1717

2289

try:

1718

2290

session.handshake()

1719

except gnutls.errors.GNUTLSError as error:

2291

except gnutls.Error as error:

1720

2292

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

1721

2293

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

1722

2294

# established. Just abandon the request.

1723

2295

return

1724

2296

logger.debug("Handshake succeeded")

1725

2297

1726

2298

approval_required = False

1727

2299

try:

1728

try:

1729

fpr = self.fingerprint(self.peer_certificate

1730

(session))

1731

except (TypeError,

1732

gnutls.errors.GNUTLSError) as error:

1733

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

1734

return

1735

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

1736

1737

try:

1738

client = ProxyClient(child_pipe, fpr,

2300

if gnutls.has_rawpk:

2301

fpr = ""

2302

try:

2303

key_id = self.key_id(

2304

self.peer_certificate(session))

2305

except (TypeError, gnutls.Error) as error:

2306

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

2307

return

2308

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

2309

2310

else:

2311

key_id = ""

2312

try:

2313

fpr = self.fingerprint(

2314

self.peer_certificate(session))

2315

except (TypeError, gnutls.Error) as error:

2316

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

2317

return

2318

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

2319

2320

try:

2321

client = ProxyClient(child_pipe, key_id, fpr,

1739

2322

self.client_address)

1740

2323

except KeyError:

1741

2324

return

1742

2325

1743

2326

if client.approval_delay:

1744

2327

delay = client.approval_delay

1745

2328

client.approvals_pending += 1

1746

2329

approval_required = True

1747

2330

1748

2331

while True:

1749

2332

if not client.enabled:

1750

2333

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

1751

client.name)

2334

client.name)

1752

2335

if self.server.use_dbus:

1753

2336

# Emit D-Bus signal

1754

2337

client.Rejected("Disabled")

1755

2338

return

1756

2339

1757

2340

if client.approved or not client.approval_delay:

1758

#We are approved or approval is disabled

2341

# We are approved or approval is disabled

1759

2342

break

1760

2343

elif client.approved is None:

1761

2344

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

1772

2355

# Emit D-Bus signal

1773

2356

client.Rejected("Denied")

1774

2357

return

1775

1776

#wait until timeout or approved

2358

2359

# wait until timeout or approved

1777

2360

time = datetime.datetime.now()

1778

2361

client.changedstate.acquire()

1779

2362

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

1792

2375

break

1793

2376

else:

1794

2377

delay -= time2 - time

1795

1796

sent_size = 0

1797

while sent_size < len(client.secret):

1798

try:

1799

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

1800

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1803

return

1804

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

1805

sent, len(client.secret)

1806

- (sent_size + sent))

1807

sent_size += sent

1808

2378

2379

try:

2380

session.send(client.secret)

2381

except gnutls.Error as error:

2382

logger.warning("gnutls send failed",

2383

exc_info=error)

2384

return

2385

1809

2386

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

1810

2387

# bump the timeout using extended_timeout

1811

2388

client.bump_timeout(client.extended_timeout)

1812

2389

if self.server.use_dbus:

1813

2390

# Emit D-Bus signal

1814

2391

client.GotSecret()

1815

2392

1816

2393

finally:

1817

2394

if approval_required:

1818

2395

client.approvals_pending -= 1

1819

2396

try:

1820

2397

session.bye()

1821

except gnutls.errors.GNUTLSError as error:

2398

except gnutls.Error as error:

1822

2399

logger.warning("GnuTLS bye failed",

1823

2400

exc_info=error)

1824

2401

1825

2402

@staticmethod

1826

2403

def peer_certificate(session):

1827

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

1828

# If not an OpenPGP certificate...

1829

if (gnutls.library.functions

1830

.gnutls_certificate_type_get(session._c_object)

1831

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1832

# ...do the normal thing

1833

return session.peer_certificate

2404

"Return the peer's certificate as a bytestring"

2405

try:

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2408

except AttributeError:

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2410

if gnutls.has_rawpk:

2411

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2412

else:

2413

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2414

# If not a valid certificate type...

2415

if cert_type not in valid_cert_types:

2416

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

2417

valid_cert_types)

2418

# ...return invalid data

2419

return b""

1834

2420

list_size = ctypes.c_uint(1)

1835

cert_list = (gnutls.library.functions

1836

.gnutls_certificate_get_peers

2421

cert_list = (gnutls.certificate_get_peers

1837

2422

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

1838

2423

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

1839

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

1840

" certificate")

2424

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

1841

2425

if list_size.value == 0:

1842

2426

return None

1843

2427

cert = cert_list[0]

1844

2428

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

1845

2429

2430

@staticmethod

2431

def key_id(certificate):

2432

"Convert a certificate bytestring to a hexdigit key ID"

2433

# New GnuTLS "datum" with the public key

2434

datum = gnutls.datum_t(

2435

ctypes.cast(ctypes.c_char_p(certificate),

2436

ctypes.POINTER(ctypes.c_ubyte)),

2437

ctypes.c_uint(len(certificate)))

2438

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

2439

# New empty GnuTLS certificate

2440

pubkey = gnutls.pubkey_t()

2441

gnutls.pubkey_init(ctypes.byref(pubkey))

2442

# Import the raw public key into the certificate

2443

gnutls.pubkey_import(pubkey,

2444

ctypes.byref(datum),

2445

gnutls.X509_FMT_DER)

2446

# New buffer for the key ID

2447

buf = ctypes.create_string_buffer(32)

2448

buf_len = ctypes.c_size_t(len(buf))

2449

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

2450

gnutls.pubkey_get_key_id(pubkey,

2451

gnutls.KEYID_USE_SHA256,

2452

ctypes.cast(ctypes.byref(buf),

2453

ctypes.POINTER(ctypes.c_ubyte)),

2454

ctypes.byref(buf_len))

2455

# Deinit the certificate

2456

gnutls.pubkey_deinit(pubkey)

2457

2458

# Convert the buffer to a Python bytestring

2459

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

2460

# Convert the bytestring to hexadecimal notation

2461

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

2462

return hex_key_id

2463

1846

2464

@staticmethod

1847

2465

def fingerprint(openpgp):

1848

2466

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1849

2467

# New GnuTLS "datum" with the OpenPGP public key

1850

datum = (gnutls.library.types

1851

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

1852

ctypes.POINTER

1853

(ctypes.c_ubyte)),

1854

ctypes.c_uint(len(openpgp))))

2468

datum = gnutls.datum_t(

2469

ctypes.cast(ctypes.c_char_p(openpgp),

2470

ctypes.POINTER(ctypes.c_ubyte)),

2471

ctypes.c_uint(len(openpgp)))

1855

2472

# New empty GnuTLS certificate

1856

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2473

crt = gnutls.openpgp_crt_t()

2474

gnutls.openpgp_crt_init(ctypes.byref(crt))

1859

2475

# Import the OpenPGP public key into the certificate

1860

(gnutls.library.functions

1861

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

1862

gnutls.library.constants

1863

.GNUTLS_OPENPGP_FMT_RAW))

2476

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

2477

gnutls.OPENPGP_FMT_RAW)

1864

2478

# Verify the self signature in the key

1865

2479

crtverify = ctypes.c_uint()

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

2480

gnutls.openpgp_crt_verify_self(crt, 0,

2481

ctypes.byref(crtverify))

1869

2482

if crtverify.value != 0:

1870

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

2483

gnutls.openpgp_crt_deinit(crt)

2484

raise gnutls.CertificateSecurityError(code

2485

=crtverify.value)

1873

2486

# New buffer for the fingerprint

1874

2487

buf = ctypes.create_string_buffer(20)

1875

2488

buf_len = ctypes.c_size_t()

1876

2489

# Get the fingerprint from the certificate into the buffer

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

2490

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

2491

ctypes.byref(buf_len))

1880

2492

# Deinit the certificate

1881

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2493

gnutls.openpgp_crt_deinit(crt)

1882

2494

# Convert the buffer to a Python bytestring

1883

2495

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

1884

2496

# Convert the bytestring to hexadecimal notation

1888

2500

1889

2501

class MultiprocessingMixIn(object):

1890

2502

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

2503

1891

2504

def sub_process_main(self, request, address):

1892

2505

try:

1893

2506

self.finish_request(request, address)

1894

2507

except Exception:

1895

2508

self.handle_error(request, address)

1896

2509

self.close_request(request)

1897

2510

1898

2511

def process_request(self, request, address):

1899

2512

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

1900

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

1901

args = (request, address))

2513

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

2514

args=(request, address))

1902

2515

proc.start()

1903

2516

return proc

1904

2517

1905

2518

1906

2519

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1907

2520

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

2521

1908

2522

def process_request(self, request, client_address):

1909

2523

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

1910

2524

1911

2525

This function creates a new pipe in self.pipe

1912

2526

"""

1913

2527

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1914

2528

1915

2529

proc = MultiprocessingMixIn.process_request(self, request,

1916

2530

client_address)

1917

2531

self.child_pipe.close()

1918

2532

self.add_pipe(parent_pipe, proc)

1919

2533

1920

2534

def add_pipe(self, parent_pipe, proc):

1921

2535

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

1922

2536

raise NotImplementedError()

1925

2539

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1926

2540

socketserver.TCPServer, object):

1927

2541

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

1928

2542

1929

2543

Attributes:

1930

2544

enabled: Boolean; whether this server is activated yet

1931

2545

interface: None or a network interface name (string)

1932

2546

use_ipv6: Boolean; to use IPv6 or not

1933

2547

"""

2548

1934

2549

def __init__(self, server_address, RequestHandlerClass,

1935

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

2550

interface=None,

2551

use_ipv6=True,

2552

socketfd=None):

1936

2553

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

1937

2554

creating a new one with socket.socket().

1938

2555

"""

1944

2561

self.socketfd = socketfd

1945

2562

# Save the original socket.socket() function

1946

2563

self.socket_socket = socket.socket

2564

1947

2565

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

1948

#

2566

#

1949

2567

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

1950

2568

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

1951

2569

# patching socket.socket.)

1952

#

2570

#

1953

2571

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

1954

2572

@functools.wraps(socket.socket)

1955

2573

def socket_wrapper(*args, **kwargs):

1967

2585

# socket_wrapper(), if socketfd was set.

1968

2586

socketserver.TCPServer.__init__(self, server_address,

1969

2587

RequestHandlerClass)

1970

2588

1971

2589

def server_bind(self):

1972

2590

"""This overrides the normal server_bind() function

1973

2591

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

1974

2592

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

2593

global SO_BINDTODEVICE

1975

2594

if self.interface is not None:

1976

2595

if SO_BINDTODEVICE is None:

1977

logger.error("SO_BINDTODEVICE does not exist;"

1978

" cannot bind to interface %s",

1979

self.interface)

1980

else:

1981

try:

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1983

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1986

except socket.error as error:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1991

logger.error("SO_BINDTODEVICE not available;"

1992

" cannot bind to interface %s",

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1997

else:

1998

raise

2596

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

2597

# common enough.

2598

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

2599

SO_BINDTODEVICE = 25

2600

try:

2601

self.socket.setsockopt(

2602

socket.SOL_SOCKET, SO_BINDTODEVICE,

2603

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

2604

except socket.error as error:

2605

if error.errno == errno.EPERM:

2606

logger.error("No permission to bind to"

2607

" interface %s", self.interface)

2608

elif error.errno == errno.ENOPROTOOPT:

2609

logger.error("SO_BINDTODEVICE not available;"

2610

" cannot bind to interface %s",

2611

self.interface)

2612

elif error.errno == errno.ENODEV:

2613

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

2614

" cannot bind", self.interface)

2615

else:

2616

raise

1999

2617

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

2000

2618

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

2001

2619

if not self.server_address[0]:

2002

2620

if self.address_family == socket.AF_INET6:

2003

any_address = "::" # in6addr_any

2621

any_address = "::" # in6addr_any

2004

2622

else:

2005

any_address = "0.0.0.0" # INADDR_ANY

2623

any_address = "0.0.0.0" # INADDR_ANY

2006

2624

self.server_address = (any_address,

2007

2625

self.server_address[1])

2008

2626

elif not self.server_address[1]:

2009

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

2010

0)

2627

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

2011

2628

# if self.interface:

2012

2629

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

2013

2630

# 0, # port

2019

2636

2020

2637

class MandosServer(IPv6_TCPServer):

2021

2638

"""Mandos server.

2022

2639

2023

2640

Attributes:

2024

2641

clients: set of Client objects

2025

2642

gnutls_priority GnuTLS priority string

2026

2643

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

2027

2028

Assumes a gobject.MainLoop event loop.

2644

2645

Assumes a GLib.MainLoop event loop.

2029

2646

"""

2647

2030

2648

def __init__(self, server_address, RequestHandlerClass,

2031

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

2032

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

2649

interface=None,

2650

use_ipv6=True,

2651

clients=None,

2652

gnutls_priority=None,

2653

use_dbus=True,

2654

socketfd=None):

2033

2655

self.enabled = False

2034

2656

self.clients = clients

2035

2657

if self.clients is None:

2038

2660

self.gnutls_priority = gnutls_priority

2039

2661

IPv6_TCPServer.__init__(self, server_address,

2040

2662

RequestHandlerClass,

2041

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

2663

interface=interface,

2664

use_ipv6=use_ipv6,

2665

socketfd=socketfd)

2666

2044

2667

def server_activate(self):

2045

2668

if self.enabled:

2046

2669

return socketserver.TCPServer.server_activate(self)

2047

2670

2048

2671

def enable(self):

2049

2672

self.enabled = True

2050

2673

2051

2674

def add_pipe(self, parent_pipe, proc):

2052

2675

# Call "handle_ipc" for both data and EOF events

2053

gobject.io_add_watch(parent_pipe.fileno(),

2054

gobject.IO_IN | gobject.IO_HUP,

2055

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2059

2060

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

2061

proc = None, client_object=None):

2676

GLib.io_add_watch(

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2679

functools.partial(self.handle_ipc,

2680

parent_pipe=parent_pipe,

2681

proc=proc))

2682

2683

def handle_ipc(self, source, condition,

2684

parent_pipe=None,

2685

proc=None,

2686

client_object=None):

2062

2687

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

2063

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

2688

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

2064

2689

# Wait for other process to exit

2065

2690

proc.join()

2066

2691

return False

2067

2692

2068

2693

# Read a request from the child

2069

2694

request = parent_pipe.recv()

2070

2695

command = request[0]

2071

2696

2072

2697

if command == 'init':

2073

fpr = request[1]

2074

address = request[2]

2075

2076

for c in self.clients.itervalues():

2077

if c.fingerprint == fpr:

2698

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

2699

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

2700

address = request[3]

2701

2702

for c in self.clients.values():

2703

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2704

continue

2705

if key_id and c.key_id == key_id:

2706

client = c

2707

break

2708

if fpr and c.fingerprint == fpr:

2078

2709

client = c

2079

2710

break

2080

2711

else:

2081

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

2082

"dress: %s", fpr, address)

2712

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

2713

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

2083

2714

if self.use_dbus:

2084

2715

# Emit D-Bus signal

2085

mandos_dbus_service.ClientNotFound(fpr,

2716

mandos_dbus_service.ClientNotFound(key_id or fpr,

2086

2717

address[0])

2087

2718

parent_pipe.send(False)

2088

2719

return False

2089

2090

gobject.io_add_watch(parent_pipe.fileno(),

2091

gobject.IO_IN | gobject.IO_HUP,

2092

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

2720

2721

GLib.io_add_watch(

2722

parent_pipe.fileno(),

2723

GLib.IO_IN | GLib.IO_HUP,

2724

functools.partial(self.handle_ipc,

2725

parent_pipe=parent_pipe,

2726

proc=proc,

2727

client_object=client))

2098

2728

parent_pipe.send(True)

2099

2729

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

2100

2730

# same fileno

2103

2733

funcname = request[1]

2104

2734

args = request[2]

2105

2735

kwargs = request[3]

2106

2736

2107

2737

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

2108

2738

funcname)(*args,

2109

**kwargs)))

2110

2739

**kwargs)))

2740

2111

2741

if command == 'getattr':

2112

2742

attrname = request[1]

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2743

if isinstance(client_object.__getattribute__(attrname),

2744

collections.Callable):

2745

parent_pipe.send(('function', ))

2115

2746

else:

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2118

2747

parent_pipe.send((

2748

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

2749

2119

2750

if command == 'setattr':

2120

2751

attrname = request[1]

2121

2752

value = request[2]

2122

2753

setattr(client_object, attrname, value)

2123

2754

2124

2755

return True

2125

2756

2126

2757

2127

2758

def rfc3339_duration_to_delta(duration):

2128

2759

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

2129

2760

2130

2761

>>> rfc3339_duration_to_delta("P7D")

2131

2762

datetime.timedelta(7)

2132

2763

>>> rfc3339_duration_to_delta("PT60S")

2142

2773

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

2774

datetime.timedelta(1, 200)

2144

2775

"""

2145

2776

2146

2777

# Parsing an RFC 3339 duration with regular expressions is not

2147

2778

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

2148

2779

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

2149

2780

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

2150

2781

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

2151

2782

# avoid excessive use of external libraries.

2152

2783

2153

2784

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2785

Token = collections.namedtuple("Token", (

2786

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

2787

# a "group" containing digits

2788

"value", # datetime.timedelta or None

2789

"followers")) # Tokens valid after this token

2163

2790

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

2164

2791

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

2165

2792

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

2166

2793

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

2167

2794

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2795

frozenset((token_end, )))

2169

2796

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

2170

2797

datetime.timedelta(minutes=1),

2171

2798

frozenset((token_second, token_end)))

2187

2814

frozenset((token_month, token_end)))

2188

2815

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

2189

2816

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2817

frozenset((token_end, )))

2191

2818

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

2192

2819

frozenset((token_year, token_month,

2193

2820

token_day, token_time,

2194

2821

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2822

# Define starting values:

2823

# Value so far

2824

value = datetime.timedelta()

2197

2825

found_token = None

2198

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

2199

s = duration # String left to parse

2826

# Following valid tokens

2827

followers = frozenset((token_duration, ))

2828

# String left to parse

2829

s = duration

2200

2830

# Loop until end token is found

2201

2831

while found_token is not token_end:

2202

2832

# Search for any currently valid tokens

2218

2848

break

2219

2849

else:

2220

2850

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2851

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

2852

.format(duration))

2222

2853

# End token found

2223

2854

return value

2224

2855

2225

2856

2226

2857

def string_to_delta(interval):

2227

2858

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

2228

2859

2229

2860

>>> string_to_delta('7d')

2230

2861

datetime.timedelta(7)

2231

2862

>>> string_to_delta('60s')

2239

2870

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

2240

2871

datetime.timedelta(0, 330)

2241

2872

"""

2242

2873

2243

2874

try:

2244

2875

return rfc3339_duration_to_delta(interval)

2245

2876

except ValueError:

2246

2877

pass

2247

2878

2248

2879

timevalue = datetime.timedelta(0)

2249

2880

for s in interval.split():

2250

2881

try:

2261

2892

elif suffix == "w":

2262

2893

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

2263

2894

else:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2895

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

2266

2896

except IndexError as e:

2267

2897

raise ValueError(*(e.args))

2268

2898

timevalue += delta

2269

2899

return timevalue

2270

2900

2271

2901

2272

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

2902

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

2273

2903

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

2274

2904

2275

2905

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

2276

2906

if os.fork():

2277

2907

sys.exit()

2284

2914

# Close all standard open file descriptors

2285

2915

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

2286

2916

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

2287

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

2917

raise OSError(errno.ENODEV,

2918

"{} not a character device"

2288

2919

.format(os.devnull))

2289

2920

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

2290

2921

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

2294

2925

2295

2926

2296

2927

def main():

2297

2928

2298

2929

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

2299

2930

# Parsing of options, both command line and config file

2300

2931

2301

2932

parser = argparse.ArgumentParser()

2302

2933

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

2303

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

2934

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

2304

2935

help="show version number and exit")

2305

2936

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

2306

2937

help="Bind to interface IF")

2342

2973

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

2343

2974

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

2344

2975

default=None)

2345

2976

2346

2977

options = parser.parse_args()

2347

2978

2348

2979

if options.check:

2349

2980

import doctest

2350

2981

fail_count, test_count = doctest.testmod()

2351

2982

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

2352

2983

2353

2984

# Default values for config file for server-global settings

2354

server_defaults = { "interface": "",

2355

"address": "",

2356

"port": "",

2357

"debug": "False",

2358

"priority":

2359

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

2360

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2361

"servicename": "Mandos",

2362

"use_dbus": "True",

2363

"use_ipv6": "True",

2364

"debuglevel": "",

2365

"restore": "True",

2366

"socket": "",

2367

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

2368

"foreground": "False",

2369

"zeroconf": "True",

2370

}

2371

2985

if gnutls.has_rawpk:

2986

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

2987

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

2988

else:

2989

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

2990

":+SIGN-DSA-SHA256")

2991

server_defaults = {"interface": "",

2992

"address": "",

2993

"port": "",

2994

"debug": "False",

2995

"priority": priority,

2996

"servicename": "Mandos",

2997

"use_dbus": "True",

2998

"use_ipv6": "True",

2999

"debuglevel": "",

3000

"restore": "True",

3001

"socket": "",

3002

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

3003

"foreground": "False",

3004

"zeroconf": "True",

3005

}

3006

del priority

3007

2372

3008

# Parse config file for server-global settings

2373

3009

server_config = configparser.SafeConfigParser(server_defaults)

2374

3010

del server_defaults

2375

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

2376

"mandos.conf"))

3011

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

2377

3012

# Convert the SafeConfigParser object to a dict

2378

3013

server_settings = server_config.defaults()

2379

3014

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

2380

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

3015

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

3016

"foreground", "zeroconf"):

2381

3017

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

2382

3018

option)

2383

3019

if server_settings["port"]:

2393

3029

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

2394

3030

["socket"])

2395

3031

del server_config

2396

3032

2397

3033

# Override the settings from the config file with command line

2398

3034

# options, if set.

2399

3035

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

2400

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

2401

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

2402

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

3036

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

3037

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

3038

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

2403

3039

value = getattr(options, option)

2404

3040

if value is not None:

2405

3041

server_settings[option] = value

2417

3053

if server_settings["debug"]:

2418

3054

server_settings["foreground"] = True

2419

3055

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

2420

3056

2421

3057

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

2422

2423

if (not server_settings["zeroconf"] and

2424

not (server_settings["port"]

2425

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

2426

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

2427

" Zeroconf")

2428

3058

3059

if (not server_settings["zeroconf"]

3060

and not (server_settings["port"]

3061

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

3062

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

3063

2429

3064

# For convenience

2430

3065

debug = server_settings["debug"]

2431

3066

debuglevel = server_settings["debuglevel"]

2435

3070

stored_state_file)

2436

3071

foreground = server_settings["foreground"]

2437

3072

zeroconf = server_settings["zeroconf"]

2438

3073

2439

3074

if debug:

2440

3075

initlogger(debug, logging.DEBUG)

2441

3076

else:

2444

3079

else:

2445

3080

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

2446

3081

initlogger(debug, level)

2447

3082

2448

3083

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

2449

syslogger.setFormatter(logging.Formatter

2450

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

2451

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

2452

.format(server_settings

2453

["servicename"])))

2454

3084

syslogger.setFormatter(

3085

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

3086

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

3087

server_settings["servicename"])))

3088

2455

3089

# Parse config file with clients

2456

3090

client_config = configparser.SafeConfigParser(Client

2457

3091

.client_defaults)

2458

3092

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

2459

3093

"clients.conf"))

2460

3094

2461

3095

global mandos_dbus_service

2462

3096

mandos_dbus_service = None

2463

3097

2464

3098

socketfd = None

2465

3099

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

2466

3100

socketfd = server_settings["socket"]

2467

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

2468

server_settings["port"]),

2469

ClientHandler,

2470

interface=(server_settings["interface"]

2471

or None),

2472

use_ipv6=use_ipv6,

2473

gnutls_priority=

2474

server_settings["priority"],

2475

use_dbus=use_dbus,

2476

socketfd=socketfd)

3101

tcp_server = MandosServer(

3102

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

3103

ClientHandler,

3104

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

3105

use_ipv6=use_ipv6,

3106

gnutls_priority=server_settings["priority"],

3107

use_dbus=use_dbus,

3108

socketfd=socketfd)

2477

3109

if not foreground:

2478

3110

pidfilename = "/run/mandos.pid"

2479

3111

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

2480

3112

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

2481

3113

pidfile = None

2482

3114

try:

2483

pidfile = open(pidfilename, "w")

3115

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

2484

3116

except IOError as e:

2485

3117

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

2486

3118

exc_info=e)

2487

2488

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

3119

3120

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

3121

("mandos", "mandos"),

3122

("nobody", "nogroup")):

2489

3123

try:

2490

3124

uid = pwd.getpwnam(name).pw_uid

2491

gid = pwd.getpwnam(name).pw_gid

3125

gid = pwd.getpwnam(group).pw_gid

2492

3126

break

2493

3127

except KeyError:

2494

3128

continue

2498

3132

try:

2499

3133

os.setgid(gid)

2500

3134

os.setuid(uid)

3135

if debug:

3136

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

3137

gid))

2501

3138

except OSError as error:

3139

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

3140

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

2502

3141

if error.errno != errno.EPERM:

2503

3142

raise

2504

3143

2505

3144

if debug:

2506

3145

# Enable all possible GnuTLS debugging

2507

3146

2508

3147

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

2509

3148

# - GnuTLS manual

2510

gnutls.library.functions.gnutls_global_set_log_level(11)

2511

2512

@gnutls.library.types.gnutls_log_func

3149

gnutls.global_set_log_level(11)

3150

3151

@gnutls.log_func

2513

3152

def debug_gnutls(level, string):

2514

3153

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

2515

2516

(gnutls.library.functions

2517

.gnutls_global_set_log_function(debug_gnutls))

2518

3154

3155

gnutls.global_set_log_function(debug_gnutls)

3156

2519

3157

# Redirect stdin so all checkers get /dev/null

2520

3158

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

2521

3159

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

2522

3160

if null > 2:

2523

3161

os.close(null)

2524

3162

2525

3163

# Need to fork before connecting to D-Bus

2526

3164

if not foreground:

2527

3165

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

2528

3166

daemon()

2529

2530

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

2531

# need to inform gobject that threads will be used.

2532

gobject.threads_init()

2533

3167

3168

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

3169

# to inform GLib that threads will be used.

3170

GLib.threads_init()

3171

2534

3172

global main_loop

2535

3173

# From the Avahi example code

2536

3174

DBusGMainLoop(set_as_default=True)

2537

main_loop = gobject.MainLoop()

3175

main_loop = GLib.MainLoop()

2538

3176

bus = dbus.SystemBus()

2539

3177

# End of Avahi example code

2540

3178

if use_dbus:

2541

3179

try:

2542

3180

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

2543

bus, do_not_queue=True)

2544

old_bus_name = (dbus.service.BusName

2545

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

2546

do_not_queue=True))

2547

except dbus.exceptions.NameExistsException as e:

3181

bus,

3182

do_not_queue=True)

3183

old_bus_name = dbus.service.BusName(

3184

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

3185

do_not_queue=True)

3186

except dbus.exceptions.DBusException as e:

2548

3187

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

2549

3188

use_dbus = False

2550

3189

server_settings["use_dbus"] = False

2551

3190

tcp_server.use_dbus = False

2552

3191

if zeroconf:

2553

3192

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2554

service = AvahiServiceToSyslog(name =

2555

server_settings["servicename"],

2556

servicetype = "_mandos._tcp",

2557

protocol = protocol, bus = bus)

3193

service = AvahiServiceToSyslog(

3194

name=server_settings["servicename"],

3195

servicetype="_mandos._tcp",

3196

protocol=protocol,

3197

bus=bus)

2558

3198

if server_settings["interface"]:

2559

service.interface = (if_nametoindex

2560

(server_settings["interface"]

2561

.encode("utf-8")))

2562

3199

service.interface = if_nametoindex(

3200

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

3201

2563

3202

global multiprocessing_manager

2564

3203

multiprocessing_manager = multiprocessing.Manager()

2565

3204

2566

3205

client_class = Client

2567

3206

if use_dbus:

2568

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

2569

3207

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

3208

2570

3209

client_settings = Client.config_parser(client_config)

2571

3210

old_client_settings = {}

2572

3211

clients_data = {}

2573

3212

2574

3213

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

2575

3214

global wnull

2576

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

3215

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

2577

3216

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

2578

3217

# mode

2579

3218

if debug or not foreground:

2580

3219

wnull.close()

2581

3220

2582

3221

# Get client data and settings from last running state.

2583

3222

if server_settings["restore"]:

2584

3223

try:

2585

3224

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

2586

clients_data, old_client_settings = (pickle.load

2587

(stored_state))

3225

if sys.version_info.major == 2:

3226

clients_data, old_client_settings = pickle.load(

3227

stored_state)

3228

else:

3229

bytes_clients_data, bytes_old_client_settings = (

3230

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

3231

# Fix bytes to strings

3232

# clients_data

3233

# .keys()

3234

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

3235

if isinstance(key, bytes)

3236

else key): value

3237

for key, value in

3238

bytes_clients_data.items()}

3239

del bytes_clients_data

3240

for key in clients_data:

3241

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

3242

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

3243

for k, v in

3244

clients_data[key].items()}

3245

clients_data[key] = value

3246

# .client_structure

3247

value["client_structure"] = [

3248

(s.decode("utf-8")

3249

if isinstance(s, bytes)

3250

else s) for s in

3251

value["client_structure"]]

3252

# .name & .host

3253

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

3254

if isinstance(value[k], bytes):

3255

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

3256

if not value.has_key("key_id"):

3257

value["key_id"] = ""

3258

elif not value.has_key("fingerprint"):

3259

value["fingerprint"] = ""

3260

# old_client_settings

3261

# .keys()

3262

old_client_settings = {

3263

(key.decode("utf-8")

3264

if isinstance(key, bytes)

3265

else key): value

3266

for key, value in

3267

bytes_old_client_settings.items()}

3268

del bytes_old_client_settings

3269

# .host

3270

for value in old_client_settings.values():

3271

if isinstance(value["host"], bytes):

3272

value["host"] = (value["host"]

3273

.decode("utf-8"))

2588

3274

os.remove(stored_state_path)

2589

3275

except IOError as e:

2590

3276

if e.errno == errno.ENOENT:

2591

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

2592

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

3277

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

3278

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

2593

3279

else:

2594

3280

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

2595

3281

exc_info=e)

2596

3282

raise

2597

3283

except EOFError as e:

2598

3284

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

2599

"EOFError:", exc_info=e)

2600

3285

"EOFError:",

3286

exc_info=e)

3287

2601

3288

with PGPEngine() as pgp:

2602

3289

for client_name, client in clients_data.items():

2603

3290

# Skip removed clients

2604

3291

if client_name not in client_settings:

2605

3292

continue

2606

3293

2607

3294

# Decide which value to use after restoring saved state.

2608

3295

# We have three different values: Old config file,

2609

3296

# new config file, and saved state.

2614

3301

# For each value in new config, check if it

2615

3302

# differs from the old config value (Except for

2616

3303

# the "secret" attribute)

2617

if (name != "secret" and

2618

value != old_client_settings[client_name]

2619

[name]):

3304

if (name != "secret"

3305

and (value !=

3306

old_client_settings[client_name][name])):

2620

3307

client[name] = value

2621

3308

except KeyError:

2622

3309

pass

2623

3310

2624

3311

# Clients who has passed its expire date can still be

2625

# enabled if its last checker was successful. Clients

3312

# enabled if its last checker was successful. A Client

2626

3313

# whose checker succeeded before we stored its state is

2627

3314

# assumed to have successfully run all checkers during

2628

3315

# downtime.

2631

3318

if not client["last_checked_ok"]:

2632

3319

logger.warning(

2633

3320

"disabling client {} - Client never "

2634

"performed a successful checker"

2635

.format(client_name))

3321

"performed a successful checker".format(

3322

client_name))

2636

3323

client["enabled"] = False

2637

3324

elif client["last_checker_status"] != 0:

2638

3325

logger.warning(

2639

3326

"disabling client {} - Client last"

2640

" checker failed with error code {}"

2641

.format(client_name,

2642

client["last_checker_status"]))

3327

" checker failed with error code"

3328

" {}".format(

3329

client_name,

3330

client["last_checker_status"]))

2643

3331

client["enabled"] = False

2644

3332

else:

2645

client["expires"] = (datetime.datetime

2646

.utcnow()

2647

+ client["timeout"])

3333

client["expires"] = (

3334

datetime.datetime.utcnow()

3335

+ client["timeout"])

2648

3336

logger.debug("Last checker succeeded,"

2649

" keeping {} enabled"

2650

.format(client_name))

3337

" keeping {} enabled".format(

3338

client_name))

2651

3339

try:

2652

client["secret"] = (

2653

pgp.decrypt(client["encrypted_secret"],

2654

client_settings[client_name]

2655

["secret"]))

3340

client["secret"] = pgp.decrypt(

3341

client["encrypted_secret"],

3342

client_settings[client_name]["secret"])

2656

3343

except PGPError:

2657

3344

# If decryption fails, we use secret from new settings

2658

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

2659

.format(client_name))

2660

client["secret"] = (

2661

client_settings[client_name]["secret"])

2662

3345

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

3346

client_name))

3347

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

3348

["secret"])

3349

2663

3350

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

2664

3351

for client_name in (set(old_client_settings)

2665

3352

- set(client_settings)):

2667

3354

for client_name in (set(client_settings)

2668

3355

- set(old_client_settings)):

2669

3356

clients_data[client_name] = client_settings[client_name]

2670

3357

2671

3358

# Create all client objects

2672

3359

for client_name, client in clients_data.items():

2673

3360

tcp_server.clients[client_name] = client_class(

2674

name = client_name, settings = client,

2675

server_settings = server_settings)

2676

3361

name=client_name,

3362

settings=client,

3363

server_settings=server_settings)

3364

2677

3365

if not tcp_server.clients:

2678

3366

logger.warning("No clients defined")

2679

3367

2680

3368

if not foreground:

2681

3369

if pidfile is not None:

3370

pid = os.getpid()

2682

3371

try:

2683

3372

with pidfile:

2684

pid = os.getpid()

2685

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

3373

print(pid, file=pidfile)

2686

3374

except IOError:

2687

3375

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

2688

3376

pidfilename, pid)

2689

3377

del pidfile

2690

3378

del pidfilename

2691

2692

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

2693

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

2694

3379

3380

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

3381

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3382

lambda: main_loop.quit() and False)

3383

2695

3384

if use_dbus:

2696

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

2697

"se.bsnet.fukt.Mandos"})

2698

class MandosDBusService(DBusObjectWithProperties):

3385

3386

@alternate_dbus_interfaces(

3387

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

3388

class MandosDBusService(DBusObjectWithObjectManager):

2699

3389

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

3390

2700

3391

def __init__(self):

2701

3392

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

3393

2702

3394

_interface = "se.recompile.Mandos"

2703

2704

@dbus_interface_annotations(_interface)

2705

def _foo(self):

2706

return { "org.freedesktop.DBus.Property"

2707

".EmitsChangedSignal":

2708

"false"}

2709

3395

2710

3396

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

2711

3397

def ClientAdded(self, objpath):

2712

3398

"D-Bus signal"

2713

3399

pass

2714

3400

2715

3401

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

2716

def ClientNotFound(self, fingerprint, address):

3402

def ClientNotFound(self, key_id, address):

2717

3403

"D-Bus signal"

2718

3404

pass

2719

3405

3406

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

3407

"true"})

2720

3408

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

2721

3409

def ClientRemoved(self, objpath, name):

2722

3410

"D-Bus signal"

2723

3411

pass

2724

3412

3413

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

3414

"true"})

2725

3415

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

2726

3416

def GetAllClients(self):

2727

3417

"D-Bus method"

2728

return dbus.Array(c.dbus_object_path

2729

for c in

2730

tcp_server.clients.itervalues())

2731

3418

return dbus.Array(c.dbus_object_path for c in

3419

tcp_server.clients.values())

3420

3421

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

3422

"true"})

2732

3423

@dbus.service.method(_interface,

2733

3424

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

2734

3425

def GetAllClientsWithProperties(self):

2735

3426

"D-Bus method"

2736

3427

return dbus.Dictionary(

2737

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

2738

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

3428

{c.dbus_object_path: c.GetAll(

3429

"se.recompile.Mandos.Client")

3430

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

2739

3431

signature="oa{sv}")

2740

3432

2741

3433

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

2742

3434

def RemoveClient(self, object_path):

2743

3435

"D-Bus method"

2744

for c in tcp_server.clients.itervalues():

3436

for c in tcp_server.clients.values():

2745

3437

if c.dbus_object_path == object_path:

2746

3438

del tcp_server.clients[c.name]

2747

3439

c.remove_from_connection()

2748

# Don't signal anything except ClientRemoved

3440

# Don't signal the disabling

2749

3441

c.disable(quiet=True)

2750

# Emit D-Bus signal

2751

self.ClientRemoved(object_path, c.name)

3442

# Emit D-Bus signal for removal

3443

self.client_removed_signal(c)

2752

3444

return

2753

3445

raise KeyError(object_path)

2754

3446

2755

3447

del _interface

2756

3448

3449

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3450

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

3451

def GetManagedObjects(self):

3452

"""D-Bus method"""

3453

return dbus.Dictionary(

3454

{client.dbus_object_path:

3455

dbus.Dictionary(

3456

{interface: client.GetAll(interface)

3457

for interface in

3458

client._get_all_interface_names()})

3459

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

3460

3461

def client_added_signal(self, client):

3462

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

3463

if use_dbus:

3464

# New standard signal

3465

self.InterfacesAdded(

3466

client.dbus_object_path,

3467

dbus.Dictionary(

3468

{interface: client.GetAll(interface)

3469

for interface in

3470

client._get_all_interface_names()}))

3471

# Old signal

3472

self.ClientAdded(client.dbus_object_path)

3473

3474

def client_removed_signal(self, client):

3475

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

3476

if use_dbus:

3477

# New standard signal

3478

self.InterfacesRemoved(

3479

client.dbus_object_path,

3480

client._get_all_interface_names())

3481

# Old signal

3482

self.ClientRemoved(client.dbus_object_path,

3483

client.name)

3484

2757

3485

mandos_dbus_service = MandosDBusService()

2758

3486

3487

# Save modules to variables to exempt the modules from being

3488

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

3489

mp = multiprocessing

3490

wn = wnull

3491

2759

3492

def cleanup():

2760

3493

"Cleanup function; run on exit"

2761

3494

if zeroconf:

2762

3495

service.cleanup()

2763

2764

multiprocessing.active_children()

2765

wnull.close()

3496

3497

mp.active_children()

3498

wn.close()

2766

3499

if not (tcp_server.clients or client_settings):

2767

3500

return

2768

3501

2769

3502

# Store client before exiting. Secrets are encrypted with key

2770

3503

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

2771

3504

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

2772

3505

clients = {}

2773

3506

with PGPEngine() as pgp:

2774

for client in tcp_server.clients.itervalues():

3507

for client in tcp_server.clients.values():

2775

3508

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

2776

3509

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

2777

3510

key)

2778

3511

client_dict = {}

2779

3512

2780

3513

# A list of attributes that can not be pickled

2781

3514

# + secret.

2782

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

2783

"checker", "server_settings" }

2784

for name, typ in (inspect.getmembers

2785

(dbus.service.Object)):

3515

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

3516

"checker", "server_settings"}

3517

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

3518

.Object):

2786

3519

exclude.add(name)

2787

3520

2788

3521

client_dict["encrypted_secret"] = (client

2789

3522

.encrypted_secret)

2790

3523

for attr in client.client_structure:

2791

3524

if attr not in exclude:

2792

3525

client_dict[attr] = getattr(client, attr)

2793

3526

2794

3527

clients[client.name] = client_dict

2795

3528

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

2796

3529

2797

3530

try:

2798

with (tempfile.NamedTemporaryFile

2799

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

2800

dir=os.path.dirname(stored_state_path),

2801

delete=False)) as stored_state:

2802

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

2803

tempname=stored_state.name

3531

with tempfile.NamedTemporaryFile(

3532

mode='wb',

3533

suffix=".pickle",

3534

prefix='clients-',

3535

dir=os.path.dirname(stored_state_path),

3536

delete=False) as stored_state:

3537

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

3538

protocol=2)

3539

tempname = stored_state.name

2804

3540

os.rename(tempname, stored_state_path)

2805

3541

except (IOError, OSError) as e:

2806

3542

if not debug:

2815

3551

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

2816

3552

exc_info=e)

2817

3553

raise

2818

3554

2819

3555

# Delete all clients, and settings from config

2820

3556

while tcp_server.clients:

2821

3557

name, client = tcp_server.clients.popitem()

2822

3558

if use_dbus:

2823

3559

client.remove_from_connection()

2824

# Don't signal anything except ClientRemoved

3560

# Don't signal the disabling

2825

3561

client.disable(quiet=True)

3562

# Emit D-Bus signal for removal

2826

3563

if use_dbus:

2827

# Emit D-Bus signal

2828

mandos_dbus_service.ClientRemoved(client

2829

.dbus_object_path,

2830

client.name)

3564

mandos_dbus_service.client_removed_signal(client)

2831

3565

client_settings.clear()

2832

3566

2833

3567

atexit.register(cleanup)

2834

2835

for client in tcp_server.clients.itervalues():

3568

3569

for client in tcp_server.clients.values():

2836

3570

if use_dbus:

2837

# Emit D-Bus signal

2838

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3571

# Emit D-Bus signal for adding

3572

mandos_dbus_service.client_added_signal(client)

2839

3573

# Need to initiate checking of clients

2840

3574

if client.enabled:

2841

3575

client.init_checker()

2842

3576

2843

3577

tcp_server.enable()

2844

3578

tcp_server.server_activate()

2845

3579

2846

3580

# Find out what port we got

2847

3581

if zeroconf:

2848

3582

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

2853

3587

else: # IPv4

2854

3588

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

2855

3589

*tcp_server.socket.getsockname())

2856

2857

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

2858

3590

3591

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

3592

2859

3593

try:

2860

3594

if zeroconf:

2861

3595

# From the Avahi example code

2866

3600

cleanup()

2867

3601

sys.exit(1)

2868

3602

# End of Avahi example code

2869

2870

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

2871

lambda *args, **kwargs:

2872

(tcp_server.handle_request

2873

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

2874

3603

3604

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

3605

lambda *args, **kwargs:

3606

(tcp_server.handle_request

3607

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

3608

2875

3609

logger.debug("Starting main loop")

2876

3610

main_loop.run()

2877

3611

except AvahiError as error:

2886

3620

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

2887

3621

cleanup()

2888

3622

3623

2889

3624

if __name__ == '__main__':

2890

3625

main()