/mandos/release : revision 237.7.292

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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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 SocketServer as 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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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 gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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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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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 cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# 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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# 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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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.3"

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version = "1.6.9"

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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")).if_nametoindex

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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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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=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 =

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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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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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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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'--quiet',

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'--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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175

229

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def password_encode(self, password):

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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proc = subprocess.Popen(['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,

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stderr=subprocess.PIPE)

253

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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raise PGPError(err)

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return ciphertext

257

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

260

with tempfile.NamedTemporaryFile(

261

dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

268

stdin=subprocess.PIPE,

269

stdout=subprocess.PIPE,

270

stderr=subprocess.PIPE)

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decrypted_plaintext, 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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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

273

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raise PGPError(err)

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222

return decrypted_plaintext

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223

276

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277

# Pretend that we have an Avahi module

278

class Avahi(object):

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

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

281

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

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

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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"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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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

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SERVER_RUNNING = 2 # avahi-common/defs.h

299

SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

302

303

304

225

class AvahiError(Exception):

305

226

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

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self.value = value

307

228

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

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**kwargs)

309

230

310

311

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class AvahiServiceError(AvahiError):

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pass

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314

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

321

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322

241

Attributes:

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242

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

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Used to optionally bind to the specified interface.

336

255

server: D-Bus Server

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bus: dbus.SystemBus()

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"""

339

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def __init__(self,

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interface=avahi.IF_UNSPEC,

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name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

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domain="",

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host="",

348

max_renames=32768,

349

protocol=avahi.PROTO_UNSPEC,

350

bus=None):

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

260

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

261

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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264

self.name = name

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265

self.type = servicetype

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274

self.server = None

363

275

self.bus = bus

364

276

self.entry_group_state_changed_match = None

365

277

366

278

def rename(self, remove=True):

367

279

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

368

280

if self.rename_count >= self.max_renames:

370

282

" after %i retries, exiting.",

371

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self.rename_count)

372

284

raise AvahiServiceError("Too many renames")

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

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self.rename_count += 1

376

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

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self.name)

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

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self.cleanup()

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os._exit(1)

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303

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def remove(self):

393

305

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

394

306

if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

397

309

if self.group is not None:

398

310

self.group.Reset()

399

311

400

312

def add(self):

401

313

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

402

314

self.remove()

419

331

dbus.UInt16(self.port),

420

332

avahi.string_array_to_txt_array(self.TXT))

421

333

self.group.Commit()

422

334

423

335

def entry_group_state_changed(self, state, error):

424

336

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

425

337

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

426

338

427

339

if state == avahi.ENTRY_GROUP_ESTABLISHED:

428

340

logger.debug("Zeroconf service established.")

429

341

elif state == avahi.ENTRY_GROUP_COLLISION:

432

344

elif state == avahi.ENTRY_GROUP_FAILURE:

433

345

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

434

346

str(error))

435

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

436

347

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

348

.format(error))

349

437

350

def cleanup(self):

438

351

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

439

352

if self.group is not None:

444

357

pass

445

358

self.group = None

446

359

self.remove()

447

360

448

361

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

449

362

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

450

363

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

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

}

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" }

457

371

if state in bad_states:

458

372

if bad_states[state] is not None:

459

373

if error is None:

462

376

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

463

377

self.cleanup()

464

378

elif state == avahi.SERVER_RUNNING:

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)

379

self.add()

477

380

else:

478

381

if error is None:

479

382

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

480

383

else:

481

384

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

482

385

483

386

def activate(self):

484

387

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

485

388

if self.server is None:

489

392

follow_name_owner_changes=True),

490

393

avahi.DBUS_INTERFACE_SERVER)

491

394

self.server.connect_to_signal("StateChanged",

492

self.server_state_changed)

395

self.server_state_changed)

493

396

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

494

397

495

398

496

399

class AvahiServiceToSyslog(AvahiService):

497

400

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

498

401

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

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)))

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)))

503

407

return ret

504

408

505

409

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

828

410

class Client(object):

829

411

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

830

412

831

413

Attributes:

832

414

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

833

415

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

835

417

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

836

418

to see if the client lives.

837

419

'None' if no process is running.

838

checker_callback_tag: a GLib event source tag, or None

420

checker_callback_tag: a gobject event source tag, or None

839

421

checker_command: string; External command which is run to check

840

422

if client lives. %() expansions are done at

841

423

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

842

424

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

843

checker_initiator_tag: a GLib event source tag, or None

425

checker_initiator_tag: a gobject event source tag, or None

844

426

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

845

427

client_structure: Object describing what attributes a client has

846

428

and is used for storing the client at exit

847

429

current_checker_command: string; current running checker_command

848

disable_initiator_tag: a GLib event source tag, or None

430

disable_initiator_tag: a gobject event source tag, or None

849

431

enabled: bool()

850

432

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

851

uniquely identify an OpenPGP client

852

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

853

a client using raw public keys

433

uniquely identify the client

854

434

host: string; available for use by the checker command

855

435

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

856

436

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

858

438

last_checker_status: integer between 0 and 255 reflecting exit

859

439

status of last checker. -1 reflects crashed

860

440

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

863

441

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

864

442

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

865

443

D-Bus identifiers

872

450

disabled, or None

873

451

server_settings: The server_settings dict from main()

874

452

"""

875

453

876

454

runtime_expansions = ("approval_delay", "approval_duration",

877

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

455

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

878

456

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

879

457

"last_approval_request", "last_checked_ok",

880

458

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

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

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

893

470

@staticmethod

894

471

def config_parser(config):

895

472

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

902

479

for client_name in config.sections():

903

480

section = dict(config.items(client_name))

904

481

client = settings[client_name] = {}

905

482

906

483

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

907

484

# Reformat values from string types to Python types

908

485

client["approved_by_default"] = config.getboolean(

909

486

client_name, "approved_by_default")

910

487

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

911

488

"enabled")

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(" ", ""))

489

490

# Uppercase and remove spaces from fingerprint for later

491

# comparison purposes with return value from the

492

# fingerprint() function

918

493

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

919

494

.replace(" ", ""))

920

495

if "secret" in section:

921

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

922

.encode("utf-8"),

923

"base64")

496

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

924

497

elif "secfile" in section:

925

498

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

926

499

(section["secfile"])),

941

514

client["last_approval_request"] = None

942

515

client["last_checked_ok"] = None

943

516

client["last_checker_status"] = -2

944

517

945

518

return settings

946

947

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

519

520

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

948

521

self.name = name

949

522

if server_settings is None:

950

523

server_settings = {}

952

525

# adding all client settings

953

526

for setting, value in settings.items():

954

527

setattr(self, setting, value)

955

528

956

529

if self.enabled:

957

530

if not hasattr(self, "last_enabled"):

958

531

self.last_enabled = datetime.datetime.utcnow()

962

535

else:

963

536

self.last_enabled = None

964

537

self.expires = None

965

538

966

539

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

967

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

968

540

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

969

541

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

970

542

datetime.datetime.utcnow())

971

543

972

544

# attributes specific for this server instance

973

545

self.checker = None

974

546

self.checker_initiator_tag = None

977

549

self.current_checker_command = None

978

550

self.approved = None

979

551

self.approvals_pending = 0

980

self.changedstate = multiprocessing_manager.Condition(

981

multiprocessing_manager.Lock())

982

self.client_structure = [attr

983

for attr in self.__dict__.keys()

552

self.changedstate = (multiprocessing_manager

553

.Condition(multiprocessing_manager

554

.Lock()))

555

self.client_structure = [attr for attr in

556

self.__dict__.iterkeys()

984

557

if not attr.startswith("_")]

985

558

self.client_structure.append("client_structure")

986

987

for name, t in inspect.getmembers(

988

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

559

560

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

561

lambda obj:

562

isinstance(obj,

563

property)):

989

564

if not name.startswith("_"):

990

565

self.client_structure.append(name)

991

566

992

567

# Send notice to process children that client state has changed

993

568

def send_changedstate(self):

994

569

with self.changedstate:

995

570

self.changedstate.notify_all()

996

571

997

572

def enable(self):

998

573

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

999

574

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

1004

579

self.last_enabled = datetime.datetime.utcnow()

1005

580

self.init_checker()

1006

581

self.send_changedstate()

1007

582

1008

583

def disable(self, quiet=True):

1009

584

"""Disable this client."""

1010

585

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

1012

587

if not quiet:

1013

588

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

1014

589

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

1015

GLib.source_remove(self.disable_initiator_tag)

590

gobject.source_remove(self.disable_initiator_tag)

1016

591

self.disable_initiator_tag = None

1017

592

self.expires = None

1018

593

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

1019

GLib.source_remove(self.checker_initiator_tag)

594

gobject.source_remove(self.checker_initiator_tag)

1020

595

self.checker_initiator_tag = None

1021

596

self.stop_checker()

1022

597

self.enabled = False

1023

598

if not quiet:

1024

599

self.send_changedstate()

1025

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

600

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

1026

601

return False

1027

602

1028

603

def __del__(self):

1029

604

self.disable()

1030

605

1031

606

def init_checker(self):

1032

607

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

1033

608

# and every interval from then on.

1034

609

if self.checker_initiator_tag is not None:

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)

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))

1039

615

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

1040

616

if self.disable_initiator_tag is not None:

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)

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))

1044

622

# Also start a new checker *right now*.

1045

623

self.start_checker()

1046

1047

def checker_callback(self, source, condition, connection,

1048

command):

624

625

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

1049

626

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

1050

627

self.checker_callback_tag = None

1051

628

self.checker = None

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

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1059

631

if self.last_checker_status == 0:

1060

632

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

1061

633

vars(self))

1062

634

self.checked_ok()

1063

635

else:

1064

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

636

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

637

vars(self))

1065

638

else:

1066

639

self.last_checker_status = -1

1067

self.last_checker_signal = -returncode

1068

640

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

1069

641

vars(self))

1070

return False

1071

642

1072

643

def checked_ok(self):

1073

644

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

1074

645

self.last_checked_ok = datetime.datetime.utcnow()

1075

646

self.last_checker_status = 0

1076

self.last_checker_signal = None

1077

647

self.bump_timeout()

1078

648

1079

649

def bump_timeout(self, timeout=None):

1080

650

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

1081

651

if timeout is None:

1082

652

timeout = self.timeout

1083

653

if self.disable_initiator_tag is not None:

1084

GLib.source_remove(self.disable_initiator_tag)

654

gobject.source_remove(self.disable_initiator_tag)

1085

655

self.disable_initiator_tag = None

1086

656

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

1087

self.disable_initiator_tag = GLib.timeout_add(

1088

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

1089

660

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

1090

661

1091

662

def need_approval(self):

1092

663

self.last_approval_request = datetime.datetime.utcnow()

1093

664

1094

665

def start_checker(self):

1095

666

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

1096

667

1097

668

If a checker already exists, leave it running and do

1098

669

nothing."""

1099

670

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

1104

675

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

1105

676

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

1106

677

# should be.

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

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)

1112

693

# Start a new checker if needed

1113

694

if self.checker is None:

1114

695

# Escape attributes for the shell

1115

escaped_attrs = {

1116

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

1117

for attr in self.runtime_expansions}

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

1118

699

try:

1119

700

command = self.checker_command % escaped_attrs

1120

701

except TypeError as error:

1121

702

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

1122

self.checker_command,

703

self.checker_command, exc_info=error)

704

return True # Try again later

705

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",

1123

727

exc_info=error)

1124

return True # Try again later

1125

self.current_checker_command = command

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

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

1152

748

return True

1153

749

1154

750

def stop_checker(self):

1155

751

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

1156

752

if self.checker_callback_tag:

1157

GLib.source_remove(self.checker_callback_tag)

753

gobject.source_remove(self.checker_callback_tag)

1158

754

self.checker_callback_tag = None

1159

755

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

1160

756

return

1161

757

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

1162

self.checker.terminate()

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

1163

766

self.checker = None

1164

767

1165

768

1166

def dbus_service_property(dbus_interface,

1167

signature="v",

1168

access="readwrite",

1169

byte_arrays=False):

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

1170

771

"""Decorators for marking methods of a DBusObjectWithProperties to

1171

772

become properties on the D-Bus.

1172

773

1173

774

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

1174

775

and with one argument by "Set".

1175

776

1176

777

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

1177

778

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

1178

779

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

1182

783

if byte_arrays and signature != "ay":

1183

784

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

1184

785

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

1185

1186

786

def decorator(func):

1187

787

func._dbus_is_property = True

1188

788

func._dbus_interface = dbus_interface

1191

791

func._dbus_name = func.__name__

1192

792

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

1193

793

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

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1195

795

return func

1196

1197

796

return decorator

1198

797

1199

798

1200

799

def dbus_interface_annotations(dbus_interface):

1201

800

"""Decorator for marking functions returning interface annotations

1202

801

1203

802

Usage:

1204

803

1205

804

@dbus_interface_annotations("org.example.Interface")

1206

805

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

1207

806

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

1208

807

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

1209

808

"false"}

1210

809

"""

1211

1212

810

def decorator(func):

1213

811

func._dbus_is_interface = True

1214

812

func._dbus_interface = dbus_interface

1215

813

func._dbus_name = dbus_interface

1216

814

return func

1217

1218

815

return decorator

1219

816

1220

817

1221

818

def dbus_annotations(annotations):

1222

819

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

1223

820

Usage:

1224

821

1225

822

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

1226

823

"org.freedesktop.DBus.Property."

1227

824

"EmitsChangedSignal": "false"})

1229

826

access="r")

1230

827

def Property_dbus_property(self):

1231

828

return dbus.Boolean(False)

1232

1233

See also the DBusObjectWithAnnotations class.

1234

829

"""

1235

1236

830

def decorator(func):

1237

831

func._dbus_annotations = annotations

1238

832

return func

1239

1240

833

return decorator

1241

834

1242

835

1245

838

"""

1246

839

pass

1247

840

1248

1249

841

class DBusPropertyAccessException(DBusPropertyException):

1250

842

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

1251

843

"""

1258

850

pass

1259

851

1260

852

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.

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.

1266

859

"""

1267

860

1268

861

@staticmethod

1269

862

def _is_dbus_thing(thing):

1270

863

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

1271

864

1272

865

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

1273

866

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

1274

867

"""

1275

868

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

1276

869

False)

1277

870

1278

871

def _get_all_dbus_things(self, thing):

1279

872

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

1280

873

"""

1281

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

874

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

875

name),

1282

876

athing.__get__(self))

1283

877

for cls in self.__class__.__mro__

1284

878

for name, athing in

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

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

881

1358

882

def _get_dbus_property(self, interface_name, property_name):

1359

883

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

1360

884

property with the specified name and interface.

1361

885

"""

1362

for cls in self.__class__.__mro__:

1363

for name, value in inspect.getmembers(

1364

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

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

1365

890

if (value._dbus_name == property_name

1366

891

and value._dbus_interface == interface_name):

1367

892

return value.__get__(self)

1368

893

1369

894

# No such property

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",

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

898

899

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

1384

900

out_signature="v")

1385

901

def Get(self, interface_name, property_name):

1386

902

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

1392

908

if not hasattr(value, "variant_level"):

1393

909

return value

1394

910

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

1395

911

1396

912

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

1397

913

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

1398

914

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

1410

926

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

1411

927

for byte in value))

1412

928

prop(value)

1413

1414

@dbus.service.method(dbus.PROPERTIES_IFACE,

1415

in_signature="s",

929

930

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

1416

931

out_signature="a{sv}")

1417

932

def GetAll(self, interface_name):

1418

933

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

1419

934

standard.

1420

935

1421

936

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

1422

937

"""

1423

938

properties = {}

1433

948

if not hasattr(value, "variant_level"):

1434

949

properties[name] = value

1435

950

continue

1436

properties[name] = type(value)(

1437

value, variant_level=value.variant_level + 1)

951

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

952

value.variant_level+1)

1438

953

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

1439

954

1440

955

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

1441

956

def PropertiesChanged(self, interface_name, changed_properties,

1442

957

invalidated_properties):

1444

959

standard.

1445

960

"""

1446

961

pass

1447

962

1448

963

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1449

964

out_signature="s",

1450

965

path_keyword='object_path',

1451

966

connection_keyword='connection')

1452

967

def Introspect(self, object_path, connection):

1453

968

"""Overloading of standard D-Bus method.

1454

969

1455

970

Inserts property tags and interface annotation tags.

1456

971

"""

1457

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1458

object_path,

1459

connection)

972

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

973

connection)

1460

974

try:

1461

975

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

1462

1463

976

def make_tag(document, name, prop):

1464

977

e = document.createElement("property")

1465

978

e.setAttribute("name", name)

1466

979

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

1467

980

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

1468

981

return e

1469

1470

982

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

1471

983

# Add property tags

1472

984

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

1475

987

if prop._dbus_interface

1476

988

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

1477

989

if_tag.appendChild(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)

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)

1494

1021

# Add the names to the return values for the

1495

1022

# "org.freedesktop.DBus.Properties" methods

1496

1023

if (if_tag.getAttribute("name")

1515

1042

return xmlstring

1516

1043

1517

1044

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

1589

1045

def datetime_to_dbus(dt, variant_level=0):

1590

1046

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

1591

1047

if dt is None:

1592

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

1593

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

1048

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1594

1051

1595

1052

1596

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1598

1055

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

1599

1056

interface names according to the "alt_interface_names" mapping.

1600

1057

Usage:

1601

1058

1602

1059

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

1603

1060

"net.example.AlternateInterface"})

1604

1061

class SampleDBusObject(dbus.service.Object):

1605

1062

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

1606

1063

def SampleDBusMethod():

1607

1064

pass

1608

1065

1609

1066

The above "SampleDBusMethod" on "SampleDBusObject" will be

1610

1067

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

1611

1068

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

1612

1069

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

1613

1070

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

1614

1071

1615

1072

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

1616

1073

(from DBusObjectWithProperties) and interfaces (from the

1617

1074

dbus_interface_annotations decorator).

1618

1075

"""

1619

1620

1076

def wrapper(cls):

1621

1077

for orig_interface_name, alt_interface_name in (

1622

alt_interface_names.items()):

1078

alt_interface_names.items()):

1623

1079

attr = {}

1624

1080

interface_names = set()

1625

1081

# Go though all attributes of the class

1627

1083

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

1628

1084

# with the wrong interface name

1629

1085

if (not hasattr(attribute, "_dbus_interface")

1630

or not attribute._dbus_interface.startswith(

1631

orig_interface_name)):

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1632

1088

continue

1633

1089

# Create an alternate D-Bus interface name based on

1634

1090

# the current name

1635

alt_interface = attribute._dbus_interface.replace(

1636

orig_interface_name, alt_interface_name)

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1637

1094

interface_names.add(alt_interface)

1638

1095

# Is this a D-Bus signal?

1639

1096

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

1640

1097

# Extract the original non-method undecorated

1641

1098

# function by black magic

1642

if sys.version_info.major == 2:

1643

nonmethod_func = (dict(

1099

nonmethod_func = (dict(

1644

1100

zip(attribute.func_code.co_freevars,

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)

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1652

1103

# Create a new, but exactly alike, function

1653

1104

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

1654

1105

# with the alternate D-Bus interface name

1655

new_function = copy_function(nonmethod_func)

1656

new_function = (dbus.service.signal(

1657

alt_interface,

1658

attribute._dbus_signature)(new_function))

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)))

1659

1115

# Copy annotations, if any

1660

1116

try:

1661

new_function._dbus_annotations = dict(

1662

attribute._dbus_annotations)

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1663

1119

except AttributeError:

1664

1120

pass

1665

1666

1121

# Define a creator of a function to call both the

1667

1122

# original and alternate functions, so both the

1668

1123

# original and alternate signals gets sent when

1671

1126

"""This function is a scope container to pass

1672

1127

func1 and func2 to the "call_both" function

1673

1128

outside of its arguments"""

1674

1675

@functools.wraps(func2)

1676

1129

def call_both(*args, **kwargs):

1677

1130

"""This function will emit two D-Bus

1678

1131

signals by calling func1 and func2"""

1679

1132

func1(*args, **kwargs)

1680

1133

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

1687

1134

return call_both

1688

1135

# Create the "call_both" function and add it to

1689

1136

# the class

1694

1141

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

1695

1142

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

1696

1143

# to the class.

1697

attr[attrname] = (

1698

dbus.service.method(

1699

alt_interface,

1700

attribute._dbus_in_signature,

1701

attribute._dbus_out_signature)

1702

(copy_function(attribute)))

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)))

1703

1154

# Copy annotations, if any

1704

1155

try:

1705

attr[attrname]._dbus_annotations = dict(

1706

attribute._dbus_annotations)

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1707

1158

except AttributeError:

1708

1159

pass

1709

1160

# Is this a D-Bus property?

1712

1163

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

1713

1164

# property with the alternate D-Bus interface

1714

1165

# name. Add it to the class.

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)))

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)))

1721

1179

# Copy annotations, if any

1722

1180

try:

1723

attr[attrname]._dbus_annotations = dict(

1724

attribute._dbus_annotations)

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1725

1183

except AttributeError:

1726

1184

pass

1727

1185

# Is this a D-Bus interface?

1730

1188

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

1731

1189

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

1732

1190

# to the class.

1733

attr[attrname] = (

1734

dbus_interface_annotations(alt_interface)

1735

(copy_function(attribute)))

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)))

1736

1199

if deprecate:

1737

1200

# Deprecate all alternate interfaces

1738

iname = "_AlternateDBusNames_interface_annotation{}"

1201

iname="_AlternateDBusNames_interface_annotation{}"

1739

1202

for interface_name in interface_names:

1740

1741

1203

@dbus_interface_annotations(interface_name)

1742

1204

def func(self):

1743

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

1744

"true"}

1205

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

1206

"true" }

1745

1207

# Find an unused name

1746

1208

for aname in (iname.format(i)

1747

1209

for i in itertools.count()):

1751

1213

if interface_names:

1752

1214

# Replace the class with a new subclass of it with

1753

1215

# methods, signals, etc. as created above.

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)

1216

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

1217

(cls,), attr)

1760

1218

return cls

1761

1762

1219

return wrapper

1763

1220

1764

1221

1765

1222

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

1766

"se.bsnet.fukt.Mandos"})

1223

"se.bsnet.fukt.Mandos"})

1767

1224

class ClientDBus(Client, DBusObjectWithProperties):

1768

1225

"""A Client class using D-Bus

1769

1226

1770

1227

Attributes:

1771

1228

dbus_object_path: dbus.ObjectPath

1772

1229

bus: dbus.SystemBus()

1773

1230

"""

1774

1231

1775

1232

runtime_expansions = (Client.runtime_expansions

1776

+ ("dbus_object_path", ))

1777

1233

+ ("dbus_object_path",))

1234

1778

1235

_interface = "se.recompile.Mandos.Client"

1779

1236

1780

1237

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

1781

1782

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

1238

1239

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

1783

1240

self.bus = bus

1784

1241

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

1785

1242

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

1787

1244

client_object_name = str(self.name).translate(

1788

1245

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

1789

1246

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

1790

self.dbus_object_path = dbus.ObjectPath(

1791

"/clients/" + client_object_name)

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1792

1249

DBusObjectWithProperties.__init__(self, self.bus,

1793

1250

self.dbus_object_path)

1794

1795

def notifychangeproperty(transform_func, dbus_name,

1796

type_func=lambda x: x,

1797

variant_level=1,

1798

invalidate_only=False,

1251

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1799

1255

_interface=_interface):

1800

1256

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

1801

1257

its changes to DBus.

1802

1258

1803

1259

transform_fun: Function that takes a value and a variant_level

1804

1260

and transforms it to a D-Bus type.

1805

1261

dbus_name: D-Bus name of the variable

1808

1264

variant_level: D-Bus variant level. Default: 1

1809

1265

"""

1810

1266

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

1811

1812

1267

def setter(self, value):

1813

1268

if hasattr(self, "dbus_object_path"):

1814

1269

if (not hasattr(self, attrname) or

1815

1270

type_func(getattr(self, attrname, None))

1816

1271

!= type_func(value)):

1817

1272

if invalidate_only:

1818

self.PropertiesChanged(

1819

_interface, dbus.Dictionary(),

1820

dbus.Array((dbus_name, )))

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1821

1277

else:

1822

dbus_value = transform_func(

1823

type_func(value),

1824

variant_level=variant_level)

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1825

1281

self.PropertyChanged(dbus.String(dbus_name),

1826

1282

dbus_value)

1827

self.PropertiesChanged(

1828

_interface,

1829

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

1830

dbus_value}),

1831

dbus.Array())

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1832

1287

setattr(self, attrname, value)

1833

1288

1834

1289

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

1835

1290

1836

1291

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1837

1292

approvals_pending = notifychangeproperty(dbus.Boolean,

1838

1293

"ApprovalPending",

1839

type_func=bool)

1294

type_func = bool)

1840

1295

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

1841

1296

last_enabled = notifychangeproperty(datetime_to_dbus,

1842

1297

"LastEnabled")

1843

checker = notifychangeproperty(

1844

dbus.Boolean, "CheckerRunning",

1845

type_func=lambda checker: checker is not None)

1298

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

1299

type_func = lambda checker:

1300

checker is not None)

1846

1301

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1847

1302

"LastCheckedOK")

1848

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1851

1306

datetime_to_dbus, "LastApprovalRequest")

1852

1307

approved_by_default = notifychangeproperty(dbus.Boolean,

1853

1308

"ApprovedByDefault")

1854

approval_delay = notifychangeproperty(

1855

dbus.UInt64, "ApprovalDelay",

1856

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

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1857

1314

approval_duration = notifychangeproperty(

1858

1315

dbus.UInt64, "ApprovalDuration",

1859

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

1316

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

1860

1317

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

1861

timeout = notifychangeproperty(

1862

dbus.UInt64, "Timeout",

1863

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1864

1321

extended_timeout = notifychangeproperty(

1865

1322

dbus.UInt64, "ExtendedTimeout",

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)

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)

1870

1329

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

1871

1330

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

1872

1331

invalidate_only=True)

1873

1332

1874

1333

del notifychangeproperty

1875

1334

1876

1335

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

1877

1336

try:

1878

1337

self.remove_from_connection()

1881

1340

if hasattr(DBusObjectWithProperties, "__del__"):

1882

1341

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

1883

1342

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

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:

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)

1892

1350

# Emit D-Bus signal

1893

1351

self.CheckerCompleted(dbus.Int16(exitstatus),

1894

# This is specific to GNU libC

1895

dbus.Int64(exitstatus << 8),

1352

dbus.Int64(condition),

1896

1353

dbus.String(command))

1897

1354

else:

1898

1355

# Emit D-Bus signal

1899

1356

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

1900

dbus.Int64(

1901

# This is specific to GNU libC

1902

(exitstatus << 8)

1903

| self.last_checker_signal),

1357

dbus.Int64(condition),

1904

1358

dbus.String(command))

1905

return ret

1906

1359

1360

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

1361

*args, **kwargs)

1362

1907

1363

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

1908

1364

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

1909

1365

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

1913

1369

# Emit D-Bus signal

1914

1370

self.CheckerStarted(self.current_checker_command)

1915

1371

return r

1916

1372

1917

1373

def _reset_approved(self):

1918

1374

self.approved = None

1919

1375

return False

1920

1376

1921

1377

def approve(self, value=True):

1922

1378

self.approved = value

1923

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

1924

* 1000), self._reset_approved)

1379

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

1380

* 1000), self._reset_approved)

1925

1381

self.send_changedstate()

1926

1927

# D-Bus methods, signals & properties

1928

1929

# Interfaces

1930

1931

# Signals

1932

1382

1383

## D-Bus methods, signals & properties

1384

1385

## Interfaces

1386

1387

## Signals

1388

1933

1389

# CheckerCompleted - signal

1934

1390

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

1935

1391

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

1936

1392

"D-Bus signal"

1937

1393

pass

1938

1394

1939

1395

# CheckerStarted - signal

1940

1396

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

1941

1397

def CheckerStarted(self, command):

1942

1398

"D-Bus signal"

1943

1399

pass

1944

1400

1945

1401

# PropertyChanged - signal

1946

1402

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

1947

1403

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

1948

1404

def PropertyChanged(self, property, value):

1949

1405

"D-Bus signal"

1950

1406

pass

1951

1407

1952

1408

# GotSecret - signal

1953

1409

@dbus.service.signal(_interface)

1954

1410

def GotSecret(self):

1957

1413

server to mandos-client

1958

1414

"""

1959

1415

pass

1960

1416

1961

1417

# Rejected - signal

1962

1418

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

1963

1419

def Rejected(self, reason):

1964

1420

"D-Bus signal"

1965

1421

pass

1966

1422

1967

1423

# NeedApproval - signal

1968

1424

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

1969

1425

def NeedApproval(self, timeout, default):

1970

1426

"D-Bus signal"

1971

1427

return self.need_approval()

1972

1973

# Methods

1974

1428

1429

## Methods

1430

1975

1431

# Approve - method

1976

1432

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

1977

1433

def Approve(self, value):

1978

1434

self.approve(value)

1979

1435

1980

1436

# CheckedOK - method

1981

1437

@dbus.service.method(_interface)

1982

1438

def CheckedOK(self):

1983

1439

self.checked_ok()

1984

1440

1985

1441

# Enable - method

1986

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

1987

1442

@dbus.service.method(_interface)

1988

1443

def Enable(self):

1989

1444

"D-Bus method"

1990

1445

self.enable()

1991

1446

1992

1447

# StartChecker - method

1993

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

1994

1448

@dbus.service.method(_interface)

1995

1449

def StartChecker(self):

1996

1450

"D-Bus method"

1997

1451

self.start_checker()

1998

1452

1999

1453

# Disable - method

2000

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

2001

1454

@dbus.service.method(_interface)

2002

1455

def Disable(self):

2003

1456

"D-Bus method"

2004

1457

self.disable()

2005

1458

2006

1459

# StopChecker - method

2007

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

2008

1460

@dbus.service.method(_interface)

2009

1461

def StopChecker(self):

2010

1462

self.stop_checker()

2011

2012

# Properties

2013

1463

1464

## Properties

1465

2014

1466

# ApprovalPending - property

2015

1467

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

2016

1468

def ApprovalPending_dbus_property(self):

2017

1469

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

2018

1470

2019

1471

# ApprovedByDefault - property

2020

@dbus_service_property(_interface,

2021

signature="b",

1472

@dbus_service_property(_interface, signature="b",

2022

1473

access="readwrite")

2023

1474

def ApprovedByDefault_dbus_property(self, value=None):

2024

1475

if value is None: # get

2025

1476

return dbus.Boolean(self.approved_by_default)

2026

1477

self.approved_by_default = bool(value)

2027

1478

2028

1479

# ApprovalDelay - property

2029

@dbus_service_property(_interface,

2030

signature="t",

1480

@dbus_service_property(_interface, signature="t",

2031

1481

access="readwrite")

2032

1482

def ApprovalDelay_dbus_property(self, value=None):

2033

1483

if value is None: # get

2034

1484

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

2035

1485

* 1000)

2036

1486

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

2037

1487

2038

1488

# ApprovalDuration - property

2039

@dbus_service_property(_interface,

2040

signature="t",

1489

@dbus_service_property(_interface, signature="t",

2041

1490

access="readwrite")

2042

1491

def ApprovalDuration_dbus_property(self, value=None):

2043

1492

if value is None: # get

2044

1493

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

2045

1494

* 1000)

2046

1495

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

2047

1496

2048

1497

# Name - property

2049

@dbus_annotations(

2050

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

2051

1498

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

2052

1499

def Name_dbus_property(self):

2053

1500

return dbus.String(self.name)

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

1501

2062

1502

# Fingerprint - property

2063

@dbus_annotations(

2064

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

2065

1503

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

2066

1504

def Fingerprint_dbus_property(self):

2067

1505

return dbus.String(self.fingerprint)

2068

1506

2069

1507

# Host - property

2070

@dbus_service_property(_interface,

2071

signature="s",

1508

@dbus_service_property(_interface, signature="s",

2072

1509

access="readwrite")

2073

1510

def Host_dbus_property(self, value=None):

2074

1511

if value is None: # get

2075

1512

return dbus.String(self.host)

2076

1513

self.host = str(value)

2077

1514

2078

1515

# Created - property

2079

@dbus_annotations(

2080

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

2081

1516

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

2082

1517

def Created_dbus_property(self):

2083

1518

return datetime_to_dbus(self.created)

2084

1519

2085

1520

# LastEnabled - property

2086

1521

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

2087

1522

def LastEnabled_dbus_property(self):

2088

1523

return datetime_to_dbus(self.last_enabled)

2089

1524

2090

1525

# Enabled - property

2091

@dbus_service_property(_interface,

2092

signature="b",

1526

@dbus_service_property(_interface, signature="b",

2093

1527

access="readwrite")

2094

1528

def Enabled_dbus_property(self, value=None):

2095

1529

if value is None: # get

2098

1532

self.enable()

2099

1533

else:

2100

1534

self.disable()

2101

1535

2102

1536

# LastCheckedOK - property

2103

@dbus_service_property(_interface,

2104

signature="s",

1537

@dbus_service_property(_interface, signature="s",

2105

1538

access="readwrite")

2106

1539

def LastCheckedOK_dbus_property(self, value=None):

2107

1540

if value is not None:

2108

1541

self.checked_ok()

2109

1542

return

2110

1543

return datetime_to_dbus(self.last_checked_ok)

2111

1544

2112

1545

# LastCheckerStatus - property

2113

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

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

2114

1548

def LastCheckerStatus_dbus_property(self):

2115

1549

return dbus.Int16(self.last_checker_status)

2116

1550

2117

1551

# Expires - property

2118

1552

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

2119

1553

def Expires_dbus_property(self):

2120

1554

return datetime_to_dbus(self.expires)

2121

1555

2122

1556

# LastApprovalRequest - property

2123

1557

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

2124

1558

def LastApprovalRequest_dbus_property(self):

2125

1559

return datetime_to_dbus(self.last_approval_request)

2126

1560

2127

1561

# Timeout - property

2128

@dbus_service_property(_interface,

2129

signature="t",

1562

@dbus_service_property(_interface, signature="t",

2130

1563

access="readwrite")

2131

1564

def Timeout_dbus_property(self, value=None):

2132

1565

if value is None: # get

2144

1577

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

2145

1578

is None):

2146

1579

return

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

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

2152

1586

# ExtendedTimeout - property

2153

@dbus_service_property(_interface,

2154

signature="t",

1587

@dbus_service_property(_interface, signature="t",

2155

1588

access="readwrite")

2156

1589

def ExtendedTimeout_dbus_property(self, value=None):

2157

1590

if value is None: # get

2158

1591

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

2159

1592

* 1000)

2160

1593

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

2161

1594

2162

1595

# Interval - property

2163

@dbus_service_property(_interface,

2164

signature="t",

1596

@dbus_service_property(_interface, signature="t",

2165

1597

access="readwrite")

2166

1598

def Interval_dbus_property(self, value=None):

2167

1599

if value is None: # get

2171

1603

return

2172

1604

if self.enabled:

2173

1605

# Reschedule checker run

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

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

2179

1611

# Checker - property

2180

@dbus_service_property(_interface,

2181

signature="s",

1612

@dbus_service_property(_interface, signature="s",

2182

1613

access="readwrite")

2183

1614

def Checker_dbus_property(self, value=None):

2184

1615

if value is None: # get

2185

1616

return dbus.String(self.checker_command)

2186

1617

self.checker_command = str(value)

2187

1618

2188

1619

# CheckerRunning - property

2189

@dbus_service_property(_interface,

2190

signature="b",

1620

@dbus_service_property(_interface, signature="b",

2191

1621

access="readwrite")

2192

1622

def CheckerRunning_dbus_property(self, value=None):

2193

1623

if value is None: # get

2196

1626

self.start_checker()

2197

1627

else:

2198

1628

self.stop_checker()

2199

1629

2200

1630

# ObjectPath - property

2201

@dbus_annotations(

2202

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

2203

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

2204

1631

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

2205

1632

def ObjectPath_dbus_property(self):

2206

return self.dbus_object_path # is already a dbus.ObjectPath

2207

1633

return self.dbus_object_path # is already a dbus.ObjectPath

1634

2208

1635

# Secret = property

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)

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

2216

1638

def Secret_dbus_property(self, value):

2217

1639

self.secret = bytes(value)

2218

1640

2219

1641

del _interface

2220

1642

2221

1643

2222

1644

class ProxyClient(object):

2223

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

1645

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

2224

1646

self._pipe = child_pipe

2225

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

1647

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

2226

1648

if not self._pipe.recv():

2227

raise KeyError(key_id or fpr)

2228

1649

raise KeyError()

1650

2229

1651

def __getattribute__(self, name):

2230

1652

if name == '_pipe':

2231

1653

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

2234

1656

if data[0] == 'data':

2235

1657

return data[1]

2236

1658

if data[0] == 'function':

2237

2238

1659

def func(*args, **kwargs):

2239

1660

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

2240

1661

return self._pipe.recv()[1]

2241

2242

1662

return func

2243

1663

2244

1664

def __setattr__(self, name, value):

2245

1665

if name == '_pipe':

2246

1666

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

2249

1669

2250

1670

class ClientHandler(socketserver.BaseRequestHandler, object):

2251

1671

"""A class to handle client connections.

2252

1672

2253

1673

Instantiated once for each connection to handle it.

2254

1674

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

2255

1675

2256

1676

def handle(self):

2257

1677

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

2258

1678

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

2259

1679

str(self.client_address))

2260

1680

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

2261

1681

self.server.child_pipe.fileno())

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"))

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"))

2269

1697

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

2270

1698

priority = self.server.gnutls_priority

2271

1699

if priority is None:

2272

1700

priority = "NORMAL"

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2276

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1704

2277

1705

# Start communication using the Mandos protocol

2278

1706

# Get protocol number

2279

1707

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

2284

1712

except (ValueError, IndexError, RuntimeError) as error:

2285

1713

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

2286

1714

return

2287

1715

2288

1716

# Start GnuTLS connection

2289

1717

try:

2290

1718

session.handshake()

2291

except gnutls.Error as error:

1719

except gnutls.errors.GNUTLSError as error:

2292

1720

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

2293

1721

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

2294

1722

# established. Just abandon the request.

2295

1723

return

2296

1724

logger.debug("Handshake succeeded")

2297

1725

2298

1726

approval_required = False

2299

1727

try:

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,

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,

2322

1739

self.client_address)

2323

1740

except KeyError:

2324

1741

return

2325

1742

2326

1743

if client.approval_delay:

2327

1744

delay = client.approval_delay

2328

1745

client.approvals_pending += 1

2329

1746

approval_required = True

2330

1747

2331

1748

while True:

2332

1749

if not client.enabled:

2333

1750

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

2334

client.name)

1751

client.name)

2335

1752

if self.server.use_dbus:

2336

1753

# Emit D-Bus signal

2337

1754

client.Rejected("Disabled")

2338

1755

return

2339

1756

2340

1757

if client.approved or not client.approval_delay:

2341

# We are approved or approval is disabled

1758

#We are approved or approval is disabled

2342

1759

break

2343

1760

elif client.approved is None:

2344

1761

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

2355

1772

# Emit D-Bus signal

2356

1773

client.Rejected("Denied")

2357

1774

return

2358

2359

# wait until timeout or approved

1775

1776

#wait until timeout or approved

2360

1777

time = datetime.datetime.now()

2361

1778

client.changedstate.acquire()

2362

1779

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

2375

1792

break

2376

1793

else:

2377

1794

delay -= time2 - time

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

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

2386

1809

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

2387

1810

# bump the timeout using extended_timeout

2388

1811

client.bump_timeout(client.extended_timeout)

2389

1812

if self.server.use_dbus:

2390

1813

# Emit D-Bus signal

2391

1814

client.GotSecret()

2392

1815

2393

1816

finally:

2394

1817

if approval_required:

2395

1818

client.approvals_pending -= 1

2396

1819

try:

2397

1820

session.bye()

2398

except gnutls.Error as error:

1821

except gnutls.errors.GNUTLSError as error:

2399

1822

logger.warning("GnuTLS bye failed",

2400

1823

exc_info=error)

2401

1824

2402

1825

@staticmethod

2403

1826

def peer_certificate(session):

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""

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

2420

1834

list_size = ctypes.c_uint(1)

2421

cert_list = (gnutls.certificate_get_peers

1835

cert_list = (gnutls.library.functions

1836

.gnutls_certificate_get_peers

2422

1837

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

2423

1838

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

2424

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

1839

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

1840

" certificate")

2425

1841

if list_size.value == 0:

2426

1842

return None

2427

1843

cert = cert_list[0]

2428

1844

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

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

1845

2464

1846

@staticmethod

2465

1847

def fingerprint(openpgp):

2466

1848

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2467

1849

# New GnuTLS "datum" with the OpenPGP public key

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)))

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))))

2472

1855

# New empty GnuTLS certificate

2473

crt = gnutls.openpgp_crt_t()

2474

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2475

1859

# Import the OpenPGP public key into the certificate

2476

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

2477

gnutls.OPENPGP_FMT_RAW)

1860

(gnutls.library.functions

1861

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

1862

gnutls.library.constants

1863

.GNUTLS_OPENPGP_FMT_RAW))

2478

1864

# Verify the self signature in the key

2479

1865

crtverify = ctypes.c_uint()

2480

gnutls.openpgp_crt_verify_self(crt, 0,

2481

ctypes.byref(crtverify))

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

2482

1869

if crtverify.value != 0:

2483

gnutls.openpgp_crt_deinit(crt)

2484

raise gnutls.CertificateSecurityError(code

2485

=crtverify.value)

1870

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

2486

1873

# New buffer for the fingerprint

2487

1874

buf = ctypes.create_string_buffer(20)

2488

1875

buf_len = ctypes.c_size_t()

2489

1876

# Get the fingerprint from the certificate into the buffer

2490

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

2491

ctypes.byref(buf_len))

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

2492

1880

# Deinit the certificate

2493

gnutls.openpgp_crt_deinit(crt)

1881

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2494

1882

# Convert the buffer to a Python bytestring

2495

1883

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

2496

1884

# Convert the bytestring to hexadecimal notation

2500

1888

2501

1889

class MultiprocessingMixIn(object):

2502

1890

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

2503

2504

1891

def sub_process_main(self, request, address):

2505

1892

try:

2506

1893

self.finish_request(request, address)

2507

1894

except Exception:

2508

1895

self.handle_error(request, address)

2509

1896

self.close_request(request)

2510

1897

2511

1898

def process_request(self, request, address):

2512

1899

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

2513

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

2514

args=(request, address))

1900

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

1901

args = (request, address))

2515

1902

proc.start()

2516

1903

return proc

2517

1904

2518

1905

2519

1906

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2520

1907

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

2521

2522

1908

def process_request(self, request, client_address):

2523

1909

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

2524

1910

2525

1911

This function creates a new pipe in self.pipe

2526

1912

"""

2527

1913

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2528

1914

2529

1915

proc = MultiprocessingMixIn.process_request(self, request,

2530

1916

client_address)

2531

1917

self.child_pipe.close()

2532

1918

self.add_pipe(parent_pipe, proc)

2533

1919

2534

1920

def add_pipe(self, parent_pipe, proc):

2535

1921

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

2536

1922

raise NotImplementedError()

2539

1925

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2540

1926

socketserver.TCPServer, object):

2541

1927

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

2542

1928

2543

1929

Attributes:

2544

1930

enabled: Boolean; whether this server is activated yet

2545

1931

interface: None or a network interface name (string)

2546

1932

use_ipv6: Boolean; to use IPv6 or not

2547

1933

"""

2548

2549

1934

def __init__(self, server_address, RequestHandlerClass,

2550

interface=None,

2551

use_ipv6=True,

2552

socketfd=None):

1935

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

2553

1936

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

2554

1937

creating a new one with socket.socket().

2555

1938

"""

2561

1944

self.socketfd = socketfd

2562

1945

# Save the original socket.socket() function

2563

1946

self.socket_socket = socket.socket

2564

2565

1947

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

2566

#

1948

#

2567

1949

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

2568

1950

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

2569

1951

# patching socket.socket.)

2570

#

1952

#

2571

1953

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

2572

1954

@functools.wraps(socket.socket)

2573

1955

def socket_wrapper(*args, **kwargs):

2585

1967

# socket_wrapper(), if socketfd was set.

2586

1968

socketserver.TCPServer.__init__(self, server_address,

2587

1969

RequestHandlerClass)

2588

1970

2589

1971

def server_bind(self):

2590

1972

"""This overrides the normal server_bind() function

2591

1973

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

2592

1974

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

2593

global SO_BINDTODEVICE

2594

1975

if self.interface is not None:

2595

1976

if SO_BINDTODEVICE is None:

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

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

2617

1999

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

2618

2000

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

2619

2001

if not self.server_address[0]:

2620

2002

if self.address_family == socket.AF_INET6:

2621

any_address = "::" # in6addr_any

2003

any_address = "::" # in6addr_any

2622

2004

else:

2623

any_address = "0.0.0.0" # INADDR_ANY

2005

any_address = "0.0.0.0" # INADDR_ANY

2624

2006

self.server_address = (any_address,

2625

2007

self.server_address[1])

2626

2008

elif not self.server_address[1]:

2627

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

2009

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

2010

0)

2628

2011

# if self.interface:

2629

2012

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

2630

2013

# 0, # port

2636

2019

2637

2020

class MandosServer(IPv6_TCPServer):

2638

2021

"""Mandos server.

2639

2022

2640

2023

Attributes:

2641

2024

clients: set of Client objects

2642

2025

gnutls_priority GnuTLS priority string

2643

2026

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

2644

2645

Assumes a GLib.MainLoop event loop.

2027

2028

Assumes a gobject.MainLoop event loop.

2646

2029

"""

2647

2648

2030

def __init__(self, server_address, RequestHandlerClass,

2649

interface=None,

2650

use_ipv6=True,

2651

clients=None,

2652

gnutls_priority=None,

2653

use_dbus=True,

2654

socketfd=None):

2031

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

2032

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

2655

2033

self.enabled = False

2656

2034

self.clients = clients

2657

2035

if self.clients is None:

2660

2038

self.gnutls_priority = gnutls_priority

2661

2039

IPv6_TCPServer.__init__(self, server_address,

2662

2040

RequestHandlerClass,

2663

interface=interface,

2664

use_ipv6=use_ipv6,

2665

socketfd=socketfd)

2666

2041

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

2667

2044

def server_activate(self):

2668

2045

if self.enabled:

2669

2046

return socketserver.TCPServer.server_activate(self)

2670

2047

2671

2048

def enable(self):

2672

2049

self.enabled = True

2673

2050

2674

2051

def add_pipe(self, parent_pipe, proc):

2675

2052

# Call "handle_ipc" for both data and EOF events

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):

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):

2687

2062

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

2688

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

2063

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

2689

2064

# Wait for other process to exit

2690

2065

proc.join()

2691

2066

return False

2692

2067

2693

2068

# Read a request from the child

2694

2069

request = parent_pipe.recv()

2695

2070

command = request[0]

2696

2071

2697

2072

if command == 'init':

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:

2073

fpr = request[1]

2074

address = request[2]

2075

2076

for c in self.clients.itervalues():

2077

if c.fingerprint == fpr:

2709

2078

client = c

2710

2079

break

2711

2080

else:

2712

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

2713

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

2081

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

2082

"dress: %s", fpr, address)

2714

2083

if self.use_dbus:

2715

2084

# Emit D-Bus signal

2716

mandos_dbus_service.ClientNotFound(key_id or fpr,

2085

mandos_dbus_service.ClientNotFound(fpr,

2717

2086

address[0])

2718

2087

parent_pipe.send(False)

2719

2088

return False

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))

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))

2728

2098

parent_pipe.send(True)

2729

2099

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

2730

2100

# same fileno

2733

2103

funcname = request[1]

2734

2104

args = request[2]

2735

2105

kwargs = request[3]

2736

2106

2737

2107

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

2738

2108

funcname)(*args,

2739

**kwargs)))

2740

2109

**kwargs)))

2110

2741

2111

if command == 'getattr':

2742

2112

attrname = request[1]

2743

if isinstance(client_object.__getattribute__(attrname),

2744

collections.Callable):

2745

parent_pipe.send(('function', ))

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2746

2115

else:

2747

parent_pipe.send((

2748

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

2749

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2118

2750

2119

if command == 'setattr':

2751

2120

attrname = request[1]

2752

2121

value = request[2]

2753

2122

setattr(client_object, attrname, value)

2754

2123

2755

2124

return True

2756

2125

2757

2126

2758

2127

def rfc3339_duration_to_delta(duration):

2759

2128

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

2760

2129

2761

2130

>>> rfc3339_duration_to_delta("P7D")

2762

2131

datetime.timedelta(7)

2763

2132

>>> rfc3339_duration_to_delta("PT60S")

2773

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2774

2143

datetime.timedelta(1, 200)

2775

2144

"""

2776

2145

2777

2146

# Parsing an RFC 3339 duration with regular expressions is not

2778

2147

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

2779

2148

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

2780

2149

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

2781

2150

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

2782

2151

# avoid excessive use of external libraries.

2783

2152

2784

2153

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

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

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

2790

2163

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

2791

2164

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

2792

2165

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

2793

2166

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

2794

2167

datetime.timedelta(seconds=1),

2795

frozenset((token_end, )))

2168

frozenset((token_end,)))

2796

2169

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

2797

2170

datetime.timedelta(minutes=1),

2798

2171

frozenset((token_second, token_end)))

2814

2187

frozenset((token_month, token_end)))

2815

2188

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

2816

2189

datetime.timedelta(weeks=1),

2817

frozenset((token_end, )))

2190

frozenset((token_end,)))

2818

2191

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

2819

2192

frozenset((token_year, token_month,

2820

2193

token_day, token_time,

2821

2194

token_week)))

2822

# Define starting values:

2823

# Value so far

2824

value = datetime.timedelta()

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2825

2197

found_token = None

2826

# Following valid tokens

2827

followers = frozenset((token_duration, ))

2828

# String left to parse

2829

s = duration

2198

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

2199

s = duration # String left to parse

2830

2200

# Loop until end token is found

2831

2201

while found_token is not token_end:

2832

2202

# Search for any currently valid tokens

2848

2218

break

2849

2219

else:

2850

2220

# No currently valid tokens were found

2851

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

2852

.format(duration))

2221

raise ValueError("Invalid RFC 3339 duration")

2853

2222

# End token found

2854

2223

return value

2855

2224

2856

2225

2857

2226

def string_to_delta(interval):

2858

2227

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

2859

2228

2860

2229

>>> string_to_delta('7d')

2861

2230

datetime.timedelta(7)

2862

2231

>>> string_to_delta('60s')

2870

2239

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

2871

2240

datetime.timedelta(0, 330)

2872

2241

"""

2873

2242

2874

2243

try:

2875

2244

return rfc3339_duration_to_delta(interval)

2876

2245

except ValueError:

2877

2246

pass

2878

2247

2879

2248

timevalue = datetime.timedelta(0)

2880

2249

for s in interval.split():

2881

2250

try:

2892

2261

elif suffix == "w":

2893

2262

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

2894

2263

else:

2895

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

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2896

2266

except IndexError as e:

2897

2267

raise ValueError(*(e.args))

2898

2268

timevalue += delta

2899

2269

return timevalue

2900

2270

2901

2271

2902

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

2272

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

2903

2273

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

2904

2274

2905

2275

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

2906

2276

if os.fork():

2907

2277

sys.exit()

2914

2284

# Close all standard open file descriptors

2915

2285

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

2916

2286

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

2917

raise OSError(errno.ENODEV,

2918

"{} not a character device"

2287

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

2919

2288

.format(os.devnull))

2920

2289

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

2921

2290

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

2925

2294

2926

2295

2927

2296

def main():

2928

2297

2929

2298

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

2930

2299

# Parsing of options, both command line and config file

2931

2300

2932

2301

parser = argparse.ArgumentParser()

2933

2302

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

2934

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

2303

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

2935

2304

help="show version number and exit")

2936

2305

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

2937

2306

help="Bind to interface IF")

2973

2342

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

2974

2343

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

2975

2344

default=None)

2976

2345

2977

2346

options = parser.parse_args()

2978

2347

2979

2348

if options.check:

2980

2349

import doctest

2981

2350

fail_count, test_count = doctest.testmod()

2982

2351

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

2983

2352

2984

2353

# Default values for config file for server-global settings

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

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

3008

2372

# Parse config file for server-global settings

3009

2373

server_config = configparser.SafeConfigParser(server_defaults)

3010

2374

del server_defaults

3011

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

2375

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

2376

"mandos.conf"))

3012

2377

# Convert the SafeConfigParser object to a dict

3013

2378

server_settings = server_config.defaults()

3014

2379

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

3015

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

3016

"foreground", "zeroconf"):

2380

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

3017

2381

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

3018

2382

option)

3019

2383

if server_settings["port"]:

3029

2393

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

3030

2394

["socket"])

3031

2395

del server_config

3032

2396

3033

2397

# Override the settings from the config file with command line

3034

2398

# options, if set.

3035

2399

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

3036

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

3037

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

3038

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

2400

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

2401

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

2402

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

3039

2403

value = getattr(options, option)

3040

2404

if value is not None:

3041

2405

server_settings[option] = value

3053

2417

if server_settings["debug"]:

3054

2418

server_settings["foreground"] = True

3055

2419

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

3056

2420

3057

2421

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

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

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

3064

2429

# For convenience

3065

2430

debug = server_settings["debug"]

3066

2431

debuglevel = server_settings["debuglevel"]

3070

2435

stored_state_file)

3071

2436

foreground = server_settings["foreground"]

3072

2437

zeroconf = server_settings["zeroconf"]

3073

2438

3074

2439

if debug:

3075

2440

initlogger(debug, logging.DEBUG)

3076

2441

else:

3079

2444

else:

3080

2445

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

3081

2446

initlogger(debug, level)

3082

2447

3083

2448

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

3084

syslogger.setFormatter(

3085

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

3086

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

3087

server_settings["servicename"])))

3088

2449

syslogger.setFormatter(logging.Formatter

2450

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

2451

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

2452

.format(server_settings

2453

["servicename"])))

2454

3089

2455

# Parse config file with clients

3090

2456

client_config = configparser.SafeConfigParser(Client

3091

2457

.client_defaults)

3092

2458

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

3093

2459

"clients.conf"))

3094

2460

3095

2461

global mandos_dbus_service

3096

2462

mandos_dbus_service = None

3097

2463

3098

2464

socketfd = None

3099

2465

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

3100

2466

socketfd = server_settings["socket"]

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)

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)

3109

2477

if not foreground:

3110

2478

pidfilename = "/run/mandos.pid"

3111

2479

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

3112

2480

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

3113

2481

pidfile = None

3114

2482

try:

3115

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

2483

pidfile = open(pidfilename, "w")

3116

2484

except IOError as e:

3117

2485

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

3118

2486

exc_info=e)

3119

3120

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

3121

("mandos", "mandos"),

3122

("nobody", "nogroup")):

2487

2488

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

3123

2489

try:

3124

2490

uid = pwd.getpwnam(name).pw_uid

3125

gid = pwd.getpwnam(group).pw_gid

2491

gid = pwd.getpwnam(name).pw_gid

3126

2492

break

3127

2493

except KeyError:

3128

2494

continue

3132

2498

try:

3133

2499

os.setgid(gid)

3134

2500

os.setuid(uid)

3135

if debug:

3136

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

3137

gid))

3138

2501

except OSError as error:

3139

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

3140

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

3141

2502

if error.errno != errno.EPERM:

3142

2503

raise

3143

2504

3144

2505

if debug:

3145

2506

# Enable all possible GnuTLS debugging

3146

2507

3147

2508

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

3148

2509

# - GnuTLS manual

3149

gnutls.global_set_log_level(11)

3150

3151

@gnutls.log_func

2510

gnutls.library.functions.gnutls_global_set_log_level(11)

2511

2512

@gnutls.library.types.gnutls_log_func

3152

2513

def debug_gnutls(level, string):

3153

2514

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

3154

3155

gnutls.global_set_log_function(debug_gnutls)

3156

2515

2516

(gnutls.library.functions

2517

.gnutls_global_set_log_function(debug_gnutls))

2518

3157

2519

# Redirect stdin so all checkers get /dev/null

3158

2520

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

3159

2521

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

3160

2522

if null > 2:

3161

2523

os.close(null)

3162

2524

3163

2525

# Need to fork before connecting to D-Bus

3164

2526

if not foreground:

3165

2527

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

3166

2528

daemon()

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

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

3172

2534

global main_loop

3173

2535

# From the Avahi example code

3174

2536

DBusGMainLoop(set_as_default=True)

3175

main_loop = GLib.MainLoop()

2537

main_loop = gobject.MainLoop()

3176

2538

bus = dbus.SystemBus()

3177

2539

# End of Avahi example code

3178

2540

if use_dbus:

3179

2541

try:

3180

2542

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

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:

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:

3187

2548

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

3188

2549

use_dbus = False

3189

2550

server_settings["use_dbus"] = False

3190

2551

tcp_server.use_dbus = False

3191

2552

if zeroconf:

3192

2553

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3193

service = AvahiServiceToSyslog(

3194

name=server_settings["servicename"],

3195

servicetype="_mandos._tcp",

3196

protocol=protocol,

3197

bus=bus)

2554

service = AvahiServiceToSyslog(name =

2555

server_settings["servicename"],

2556

servicetype = "_mandos._tcp",

2557

protocol = protocol, bus = bus)

3198

2558

if server_settings["interface"]:

3199

service.interface = if_nametoindex(

3200

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

3201

2559

service.interface = (if_nametoindex

2560

(server_settings["interface"]

2561

.encode("utf-8")))

2562

3202

2563

global multiprocessing_manager

3203

2564

multiprocessing_manager = multiprocessing.Manager()

3204

2565

3205

2566

client_class = Client

3206

2567

if use_dbus:

3207

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

3208

2568

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

2569

3209

2570

client_settings = Client.config_parser(client_config)

3210

2571

old_client_settings = {}

3211

2572

clients_data = {}

3212

2573

3213

2574

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

3214

2575

global wnull

3215

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

2576

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

3216

2577

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

3217

2578

# mode

3218

2579

if debug or not foreground:

3219

2580

wnull.close()

3220

2581

3221

2582

# Get client data and settings from last running state.

3222

2583

if server_settings["restore"]:

3223

2584

try:

3224

2585

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

2586

clients_data, old_client_settings = (pickle.load

2587

(stored_state))

3274

2588

os.remove(stored_state_path)

3275

2589

except IOError as e:

3276

2590

if e.errno == errno.ENOENT:

3277

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

3278

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

2591

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

2592

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

3279

2593

else:

3280

2594

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

3281

2595

exc_info=e)

3282

2596

raise

3283

2597

except EOFError as e:

3284

2598

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

3285

"EOFError:",

3286

exc_info=e)

3287

2599

"EOFError:", exc_info=e)

2600

3288

2601

with PGPEngine() as pgp:

3289

2602

for client_name, client in clients_data.items():

3290

2603

# Skip removed clients

3291

2604

if client_name not in client_settings:

3292

2605

continue

3293

2606

3294

2607

# Decide which value to use after restoring saved state.

3295

2608

# We have three different values: Old config file,

3296

2609

# new config file, and saved state.

3301

2614

# For each value in new config, check if it

3302

2615

# differs from the old config value (Except for

3303

2616

# the "secret" attribute)

3304

if (name != "secret"

3305

and (value !=

3306

old_client_settings[client_name][name])):

2617

if (name != "secret" and

2618

value != old_client_settings[client_name]

2619

[name]):

3307

2620

client[name] = value

3308

2621

except KeyError:

3309

2622

pass

3310

2623

3311

2624

# Clients who has passed its expire date can still be

3312

# enabled if its last checker was successful. A Client

2625

# enabled if its last checker was successful. Clients

3313

2626

# whose checker succeeded before we stored its state is

3314

2627

# assumed to have successfully run all checkers during

3315

2628

# downtime.

3318

2631

if not client["last_checked_ok"]:

3319

2632

logger.warning(

3320

2633

"disabling client {} - Client never "

3321

"performed a successful checker".format(

3322

client_name))

2634

"performed a successful checker"

2635

.format(client_name))

3323

2636

client["enabled"] = False

3324

2637

elif client["last_checker_status"] != 0:

3325

2638

logger.warning(

3326

2639

"disabling client {} - Client last"

3327

" checker failed with error code"

3328

" {}".format(

3329

client_name,

3330

client["last_checker_status"]))

2640

" checker failed with error code {}"

2641

.format(client_name,

2642

client["last_checker_status"]))

3331

2643

client["enabled"] = False

3332

2644

else:

3333

client["expires"] = (

3334

datetime.datetime.utcnow()

3335

+ client["timeout"])

2645

client["expires"] = (datetime.datetime

2646

.utcnow()

2647

+ client["timeout"])

3336

2648

logger.debug("Last checker succeeded,"

3337

" keeping {} enabled".format(

3338

client_name))

2649

" keeping {} enabled"

2650

.format(client_name))

3339

2651

try:

3340

client["secret"] = pgp.decrypt(

3341

client["encrypted_secret"],

3342

client_settings[client_name]["secret"])

2652

client["secret"] = (

2653

pgp.decrypt(client["encrypted_secret"],

2654

client_settings[client_name]

2655

["secret"]))

3343

2656

except PGPError:

3344

2657

# If decryption fails, we use secret from new settings

3345

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

3346

client_name))

3347

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

3348

["secret"])

3349

2658

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

2659

.format(client_name))

2660

client["secret"] = (

2661

client_settings[client_name]["secret"])

2662

3350

2663

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

3351

2664

for client_name in (set(old_client_settings)

3352

2665

- set(client_settings)):

3354

2667

for client_name in (set(client_settings)

3355

2668

- set(old_client_settings)):

3356

2669

clients_data[client_name] = client_settings[client_name]

3357

2670

3358

2671

# Create all client objects

3359

2672

for client_name, client in clients_data.items():

3360

2673

tcp_server.clients[client_name] = client_class(

3361

name=client_name,

3362

settings=client,

3363

server_settings=server_settings)

3364

2674

name = client_name, settings = client,

2675

server_settings = server_settings)

2676

3365

2677

if not tcp_server.clients:

3366

2678

logger.warning("No clients defined")

3367

2679

3368

2680

if not foreground:

3369

2681

if pidfile is not None:

3370

pid = os.getpid()

3371

2682

try:

3372

2683

with pidfile:

3373

print(pid, file=pidfile)

2684

pid = os.getpid()

2685

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

3374

2686

except IOError:

3375

2687

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

3376

2688

pidfilename, pid)

3377

2689

del pidfile

3378

2690

del pidfilename

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

2691

2692

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

2693

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

2694

3384

2695

if use_dbus:

3385

3386

@alternate_dbus_interfaces(

3387

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

3388

class MandosDBusService(DBusObjectWithObjectManager):

2696

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

2697

"se.bsnet.fukt.Mandos"})

2698

class MandosDBusService(DBusObjectWithProperties):

3389

2699

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

3390

3391

2700

def __init__(self):

3392

2701

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

3393

3394

2702

_interface = "se.recompile.Mandos"

3395

2703

2704

@dbus_interface_annotations(_interface)

2705

def _foo(self):

2706

return { "org.freedesktop.DBus.Property"

2707

".EmitsChangedSignal":

2708

"false"}

2709

3396

2710

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

3397

2711

def ClientAdded(self, objpath):

3398

2712

"D-Bus signal"

3399

2713

pass

3400

2714

3401

2715

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

3402

def ClientNotFound(self, key_id, address):

2716

def ClientNotFound(self, fingerprint, address):

3403

2717

"D-Bus signal"

3404

2718

pass

3405

3406

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

3407

"true"})

2719

3408

2720

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

3409

2721

def ClientRemoved(self, objpath, name):

3410

2722

"D-Bus signal"

3411

2723

pass

3412

3413

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

3414

"true"})

2724

3415

2725

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

3416

2726

def GetAllClients(self):

3417

2727

"D-Bus method"

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"})

2728

return dbus.Array(c.dbus_object_path

2729

for c in

2730

tcp_server.clients.itervalues())

2731

3423

2732

@dbus.service.method(_interface,

3424

2733

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

3425

2734

def GetAllClientsWithProperties(self):

3426

2735

"D-Bus method"

3427

2736

return dbus.Dictionary(

3428

{c.dbus_object_path: c.GetAll(

3429

"se.recompile.Mandos.Client")

3430

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

2737

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

2738

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

3431

2739

signature="oa{sv}")

3432

2740

3433

2741

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

3434

2742

def RemoveClient(self, object_path):

3435

2743

"D-Bus method"

3436

for c in tcp_server.clients.values():

2744

for c in tcp_server.clients.itervalues():

3437

2745

if c.dbus_object_path == object_path:

3438

2746

del tcp_server.clients[c.name]

3439

2747

c.remove_from_connection()

3440

# Don't signal the disabling

2748

# Don't signal anything except ClientRemoved

3441

2749

c.disable(quiet=True)

3442

# Emit D-Bus signal for removal

3443

self.client_removed_signal(c)

2750

# Emit D-Bus signal

2751

self.ClientRemoved(object_path, c.name)

3444

2752

return

3445

2753

raise KeyError(object_path)

3446

2754

3447

2755

del _interface

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

2756

3485

2757

mandos_dbus_service = MandosDBusService()

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

2758

3492

2759

def cleanup():

3493

2760

"Cleanup function; run on exit"

3494

2761

if zeroconf:

3495

2762

service.cleanup()

3496

3497

mp.active_children()

3498

wn.close()

2763

2764

multiprocessing.active_children()

2765

wnull.close()

3499

2766

if not (tcp_server.clients or client_settings):

3500

2767

return

3501

2768

3502

2769

# Store client before exiting. Secrets are encrypted with key

3503

2770

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

3504

2771

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

3505

2772

clients = {}

3506

2773

with PGPEngine() as pgp:

3507

for client in tcp_server.clients.values():

2774

for client in tcp_server.clients.itervalues():

3508

2775

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

3509

2776

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

3510

2777

key)

3511

2778

client_dict = {}

3512

2779

3513

2780

# A list of attributes that can not be pickled

3514

2781

# + secret.

3515

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

3516

"checker", "server_settings"}

3517

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

3518

.Object):

2782

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

2783

"checker", "server_settings" }

2784

for name, typ in (inspect.getmembers

2785

(dbus.service.Object)):

3519

2786

exclude.add(name)

3520

2787

3521

2788

client_dict["encrypted_secret"] = (client

3522

2789

.encrypted_secret)

3523

2790

for attr in client.client_structure:

3524

2791

if attr not in exclude:

3525

2792

client_dict[attr] = getattr(client, attr)

3526

2793

3527

2794

clients[client.name] = client_dict

3528

2795

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

3529

2796

3530

2797

try:

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

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

3540

2804

os.rename(tempname, stored_state_path)

3541

2805

except (IOError, OSError) as e:

3542

2806

if not debug:

3551

2815

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

3552

2816

exc_info=e)

3553

2817

raise

3554

2818

3555

2819

# Delete all clients, and settings from config

3556

2820

while tcp_server.clients:

3557

2821

name, client = tcp_server.clients.popitem()

3558

2822

if use_dbus:

3559

2823

client.remove_from_connection()

3560

# Don't signal the disabling

2824

# Don't signal anything except ClientRemoved

3561

2825

client.disable(quiet=True)

3562

# Emit D-Bus signal for removal

3563

2826

if use_dbus:

3564

mandos_dbus_service.client_removed_signal(client)

2827

# Emit D-Bus signal

2828

mandos_dbus_service.ClientRemoved(client

2829

.dbus_object_path,

2830

client.name)

3565

2831

client_settings.clear()

3566

2832

3567

2833

atexit.register(cleanup)

3568

3569

for client in tcp_server.clients.values():

2834

2835

for client in tcp_server.clients.itervalues():

3570

2836

if use_dbus:

3571

# Emit D-Bus signal for adding

3572

mandos_dbus_service.client_added_signal(client)

2837

# Emit D-Bus signal

2838

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3573

2839

# Need to initiate checking of clients

3574

2840

if client.enabled:

3575

2841

client.init_checker()

3576

2842

3577

2843

tcp_server.enable()

3578

2844

tcp_server.server_activate()

3579

2845

3580

2846

# Find out what port we got

3581

2847

if zeroconf:

3582

2848

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

3587

2853

else: # IPv4

3588

2854

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

3589

2855

*tcp_server.socket.getsockname())

3590

3591

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

3592

2856

2857

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

2858

3593

2859

try:

3594

2860

if zeroconf:

3595

2861

# From the Avahi example code

3600

2866

cleanup()

3601

2867

sys.exit(1)

3602

2868

# End of Avahi example code

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

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

3609

2875

logger.debug("Starting main loop")

3610

2876

main_loop.run()

3611

2877

except AvahiError as error:

3620

2886

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

3621

2887

cleanup()

3622

2888

3623

3624

2889

if __name__ == '__main__':

3625

2890

main()