/mandos/trunk : revision 237.4.98

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.8"

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version = "1.7.19"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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228

176

229

def password_encode(self, password):

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

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

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

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

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return encoded

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239

187

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

242

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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257

205

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

260

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

215

stdin = subprocess.PIPE,

216

stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

218

decrypted_plaintext, err = proc.communicate(input

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= data)

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

220

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

223

275

224

276

277

# Pretend that we have an Avahi module

278

class Avahi(object):

279

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

280

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

281

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

282

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

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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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290

def string_array_to_txt_array(self, t):

291

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

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

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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

298

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

225

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class AvahiError(Exception):

226

305

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

227

306

self.value = value

228

307

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

229

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**kwargs)

230

309

310

231

311

class AvahiServiceError(AvahiError):

232

312

pass

233

313

314

234

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class AvahiGroupError(AvahiError):

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pass

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318

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

240

321

241

322

Attributes:

242

323

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

243

324

Used to optionally bind to the specified interface.

255

336

server: D-Bus Server

256

337

bus: dbus.SystemBus()

257

338

"""

258

259

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

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

261

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

262

protocol = avahi.PROTO_UNSPEC, bus = None):

339

340

def __init__(self,

341

interface=avahi.IF_UNSPEC,

342

name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

346

domain="",

347

host="",

348

max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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352

self.name = name

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353

self.type = servicetype

274

362

self.server = None

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363

self.bus = bus

276

364

self.entry_group_state_changed_match = None

277

278

def rename(self):

365

366

def rename(self, remove=True):

279

367

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

280

368

if self.rename_count >= self.max_renames:

281

369

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

282

370

" after %i retries, exiting.",

283

371

self.rename_count)

284

372

raise AvahiServiceError("Too many renames")

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

287

376

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

288

377

self.name)

289

self.remove()

378

if remove:

379

self.remove()

290

380

try:

291

381

self.add()

292

382

except dbus.exceptions.DBusException as error:

293

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

294

self.cleanup()

295

os._exit(1)

296

self.rename_count += 1

297

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

298

392

def remove(self):

299

393

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

300

394

if self.entry_group_state_changed_match is not None:

302

396

self.entry_group_state_changed_match = None

303

397

if self.group is not None:

304

398

self.group.Reset()

305

399

306

400

def add(self):

307

401

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

308

402

self.remove()

325

419

dbus.UInt16(self.port),

326

420

avahi.string_array_to_txt_array(self.TXT))

327

421

self.group.Commit()

328

422

329

423

def entry_group_state_changed(self, state, error):

330

424

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

331

425

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

332

426

333

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

334

428

logger.debug("Zeroconf service established.")

335

429

elif state == avahi.ENTRY_GROUP_COLLISION:

338

432

elif state == avahi.ENTRY_GROUP_FAILURE:

339

433

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

340

434

str(error))

341

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

342

.format(error))

343

435

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

436

344

437

def cleanup(self):

345

438

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

346

439

if self.group is not None:

351

444

pass

352

445

self.group = None

353

446

self.remove()

354

447

355

448

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

356

449

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

357

450

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

358

bad_states = { avahi.SERVER_INVALID:

359

"Zeroconf server invalid",

360

avahi.SERVER_REGISTERING: None,

361

avahi.SERVER_COLLISION:

362

"Zeroconf server name collision",

363

avahi.SERVER_FAILURE:

364

"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

365

457

if state in bad_states:

366

458

if bad_states[state] is not None:

367

459

if error is None:

370

462

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

371

463

self.cleanup()

372

464

elif state == avahi.SERVER_RUNNING:

373

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

374

477

else:

375

478

if error is None:

376

479

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

377

480

else:

378

481

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

379

482

380

483

def activate(self):

381

484

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

382

485

if self.server is None:

386

489

follow_name_owner_changes=True),

387

490

avahi.DBUS_INTERFACE_SERVER)

388

491

self.server.connect_to_signal("StateChanged",

389

self.server_state_changed)

492

self.server_state_changed)

390

493

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

391

494

392

495

393

496

class AvahiServiceToSyslog(AvahiService):

394

def rename(self):

497

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

395

498

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

396

ret = AvahiService.rename(self)

397

syslogger.setFormatter(logging.Formatter

398

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

399

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

400

.format(self.name)))

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

401

503

return ret

402

504

403

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

518

def __init__(self):

519

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

520

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

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

def call_pipe(connection, # : multiprocessing.Connection

770

func, *args, **kwargs):

771

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

772

773

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

774

return value on the provided multiprocessing.Connection.

775

"""

776

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

777

connection.close()

778

779

404

780

class Client(object):

405

781

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

406

782

407

783

Attributes:

408

784

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

409

785

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

411

787

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

412

788

to see if the client lives.

413

789

'None' if no process is running.

414

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

415

791

checker_command: string; External command which is run to check

416

792

if client lives. %() expansions are done at

417

793

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

418

794

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

419

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

420

796

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

421

797

client_structure: Object describing what attributes a client has

422

798

and is used for storing the client at exit

423

799

current_checker_command: string; current running checker_command

424

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

425

801

enabled: bool()

426

802

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

427

803

uniquely identify the client

432

808

last_checker_status: integer between 0 and 255 reflecting exit

433

809

status of last checker. -1 reflects crashed

434

810

checker, -2 means no checker completed yet.

811

last_checker_signal: The signal which killed the last checker, if

812

last_checker_status is -1

435

813

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

436

814

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

437

815

D-Bus identifiers

444

822

disabled, or None

445

823

server_settings: The server_settings dict from main()

446

824

"""

447

825

448

826

runtime_expansions = ("approval_delay", "approval_duration",

449

827

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

450

828

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

451

829

"last_approval_request", "last_checked_ok",

452

830

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

453

client_defaults = { "timeout": "PT5M",

454

"extended_timeout": "PT15M",

455

"interval": "PT2M",

456

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

457

"host": "",

458

"approval_delay": "PT0S",

459

"approval_duration": "PT1S",

460

"approved_by_default": "True",

461

"enabled": "True",

462

}

463

831

client_defaults = {

832

"timeout": "PT5M",

833

"extended_timeout": "PT15M",

834

"interval": "PT2M",

835

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

836

"host": "",

837

"approval_delay": "PT0S",

838

"approval_duration": "PT1S",

839

"approved_by_default": "True",

840

"enabled": "True",

841

}

842

464

843

@staticmethod

465

844

def config_parser(config):

466

845

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

473

852

for client_name in config.sections():

474

853

section = dict(config.items(client_name))

475

854

client = settings[client_name] = {}

476

855

477

856

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

478

857

# Reformat values from string types to Python types

479

858

client["approved_by_default"] = config.getboolean(

480

859

client_name, "approved_by_default")

481

860

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

482

861

"enabled")

483

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

484

866

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

485

867

.replace(" ", ""))

486

868

if "secret" in section:

487

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

869

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

870

.encode("utf-8"),

871

"base64")

488

872

elif "secfile" in section:

489

873

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

490

874

(section["secfile"])),

505

889

client["last_approval_request"] = None

506

890

client["last_checked_ok"] = None

507

891

client["last_checker_status"] = -2

508

892

509

893

return settings

510

511

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

894

895

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

512

896

self.name = name

513

897

if server_settings is None:

514

898

server_settings = {}

516

900

# adding all client settings

517

901

for setting, value in settings.items():

518

902

setattr(self, setting, value)

519

903

520

904

if self.enabled:

521

905

if not hasattr(self, "last_enabled"):

522

906

self.last_enabled = datetime.datetime.utcnow()

526

910

else:

527

911

self.last_enabled = None

528

912

self.expires = None

529

913

530

914

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

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the fingerprint()

533

# function

534

915

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

535

916

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

536

917

datetime.datetime.utcnow())

537

918

538

919

# attributes specific for this server instance

539

920

self.checker = None

540

921

self.checker_initiator_tag = None

543

924

self.current_checker_command = None

544

925

self.approved = None

545

926

self.approvals_pending = 0

546

self.changedstate = (multiprocessing_manager

547

.Condition(multiprocessing_manager

548

.Lock()))

549

self.client_structure = [attr for attr in

550

self.__dict__.iterkeys()

927

self.changedstate = multiprocessing_manager.Condition(

928

multiprocessing_manager.Lock())

929

self.client_structure = [attr

930

for attr in self.__dict__.keys()

551

931

if not attr.startswith("_")]

552

932

self.client_structure.append("client_structure")

553

554

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

555

lambda obj:

556

isinstance(obj,

557

property)):

933

934

for name, t in inspect.getmembers(

935

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

558

936

if not name.startswith("_"):

559

937

self.client_structure.append(name)

560

938

561

939

# Send notice to process children that client state has changed

562

940

def send_changedstate(self):

563

941

with self.changedstate:

564

942

self.changedstate.notify_all()

565

943

566

944

def enable(self):

567

945

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

568

946

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

573

951

self.last_enabled = datetime.datetime.utcnow()

574

952

self.init_checker()

575

953

self.send_changedstate()

576

954

577

955

def disable(self, quiet=True):

578

956

"""Disable this client."""

579

957

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

581

959

if not quiet:

582

960

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

583

961

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

584

gobject.source_remove(self.disable_initiator_tag)

962

GLib.source_remove(self.disable_initiator_tag)

585

963

self.disable_initiator_tag = None

586

964

self.expires = None

587

965

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

588

gobject.source_remove(self.checker_initiator_tag)

966

GLib.source_remove(self.checker_initiator_tag)

589

967

self.checker_initiator_tag = None

590

968

self.stop_checker()

591

969

self.enabled = False

592

970

if not quiet:

593

971

self.send_changedstate()

594

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

972

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

595

973

return False

596

974

597

975

def __del__(self):

598

976

self.disable()

599

977

600

978

def init_checker(self):

601

979

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

602

980

# and every interval from then on.

603

981

if self.checker_initiator_tag is not None:

604

gobject.source_remove(self.checker_initiator_tag)

605

self.checker_initiator_tag = (gobject.timeout_add

606

(int(self.interval

607

.total_seconds() * 1000),

608

self.start_checker))

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

984

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

985

self.start_checker)

609

986

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

610

987

if self.disable_initiator_tag is not None:

611

gobject.source_remove(self.disable_initiator_tag)

612

self.disable_initiator_tag = (gobject.timeout_add

613

(int(self.timeout

614

.total_seconds() * 1000),

615

self.disable))

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

990

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

616

991

# Also start a new checker *right now*.

617

992

self.start_checker()

618

619

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

620

996

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

621

997

self.checker_callback_tag = None

622

998

self.checker = None

623

if os.WIFEXITED(condition):

624

self.last_checker_status = os.WEXITSTATUS(condition)

999

# Read return code from connection (see call_pipe)

1000

returncode = connection.recv()

1001

connection.close()

1002

1003

if returncode >= 0:

1004

self.last_checker_status = returncode

1005

self.last_checker_signal = None

625

1006

if self.last_checker_status == 0:

626

1007

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

627

1008

vars(self))

628

1009

self.checked_ok()

629

1010

else:

630

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

631

vars(self))

1011

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

632

1012

else:

633

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

634

1015

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

635

1016

vars(self))

636

1017

return False

1018

637

1019

def checked_ok(self):

638

1020

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

639

1021

self.last_checked_ok = datetime.datetime.utcnow()

640

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

641

1024

self.bump_timeout()

642

1025

643

1026

def bump_timeout(self, timeout=None):

644

1027

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

645

1028

if timeout is None:

646

1029

timeout = self.timeout

647

1030

if self.disable_initiator_tag is not None:

648

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

649

1032

self.disable_initiator_tag = None

650

1033

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

651

self.disable_initiator_tag = (gobject.timeout_add

652

(int(timeout.total_seconds()

653

* 1000), self.disable))

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

654

1036

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

655

1037

656

1038

def need_approval(self):

657

1039

self.last_approval_request = datetime.datetime.utcnow()

658

1040

659

1041

def start_checker(self):

660

1042

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

661

1043

662

1044

If a checker already exists, leave it running and do

663

1045

nothing."""

664

1046

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

669

1051

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

670

1052

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

671

1053

# should be.

672

673

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

674

try:

675

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

676

except AttributeError:

677

pass

678

except OSError as error:

679

if error.errno != errno.ECHILD:

680

raise

681

else:

682

if pid:

683

logger.warning("Checker was a zombie")

684

gobject.source_remove(self.checker_callback_tag)

685

self.checker_callback(pid, status,

686

self.current_checker_command)

1054

1055

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

1056

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

1057

self.checker.join()

1058

self.checker = None

687

1059

# Start a new checker if needed

688

1060

if self.checker is None:

689

1061

# Escape attributes for the shell

690

escaped_attrs = { attr:

691

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

692

for attr in self.runtime_expansions }

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

693

1065

try:

694

1066

command = self.checker_command % escaped_attrs

695

1067

except TypeError as error:

696

1068

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

697

self.checker_command, exc_info=error)

698

return True # Try again later

1069

self.checker_command,

1070

exc_info=error)

1071

return True # Try again later

699

1072

self.current_checker_command = command

700

try:

701

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

702

command, self.name)

703

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

704

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

705

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

706

# always replaced by /dev/null.)

707

# The exception is when not debugging but nevertheless

708

# running in the foreground; use the previously

709

# created wnull.

710

popen_args = {}

711

if (not self.server_settings["debug"]

712

and self.server_settings["foreground"]):

713

popen_args.update({"stdout": wnull,

714

"stderr": wnull })

715

self.checker = subprocess.Popen(command,

716

close_fds=True,

717

shell=True, cwd="/",

718

**popen_args)

719

except OSError as error:

720

logger.error("Failed to start subprocess",

721

exc_info=error)

722

return True

723

self.checker_callback_tag = (gobject.child_watch_add

724

(self.checker.pid,

725

self.checker_callback,

726

data=command))

727

# The checker may have completed before the gobject

728

# watch was added. Check for this.

729

try:

730

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

731

except OSError as error:

732

if error.errno == errno.ECHILD:

733

# This should never happen

734

logger.error("Child process vanished",

735

exc_info=error)

736

return True

737

raise

738

if pid:

739

gobject.source_remove(self.checker_callback_tag)

740

self.checker_callback(pid, status, command)

741

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

1073

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

1074

self.name)

1075

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

1076

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

1077

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

1078

# always replaced by /dev/null.)

1079

# The exception is when not debugging but nevertheless

1080

# running in the foreground; use the previously

1081

# created wnull.

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

1085

if (not self.server_settings["debug"]

1086

and self.server_settings["foreground"]):

1087

popen_args.update({"stdout": wnull,

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

1090

self.checker = multiprocessing.Process(

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

1094

self.checker.start()

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

1097

self.checker_callback, pipe[0], command)

1098

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

742

1099

return True

743

1100

744

1101

def stop_checker(self):

745

1102

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

746

1103

if self.checker_callback_tag:

747

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

748

1105

self.checker_callback_tag = None

749

1106

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

750

1107

return

751

1108

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

752

try:

753

self.checker.terminate()

754

#time.sleep(0.5)

755

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

756

# self.checker.kill()

757

except OSError as error:

758

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

759

raise

1109

self.checker.terminate()

760

1110

self.checker = None

761

1111

762

1112

763

def dbus_service_property(dbus_interface, signature="v",

764

access="readwrite", byte_arrays=False):

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

765

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

766

1118

become properties on the D-Bus.

767

1119

768

1120

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

769

1121

and with one argument by "Set".

770

1122

771

1123

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

772

1124

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

773

1125

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

777

1129

if byte_arrays and signature != "ay":

778

1130

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

779

1131

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

1132

780

1133

def decorator(func):

781

1134

func._dbus_is_property = True

782

1135

func._dbus_interface = dbus_interface

785

1138

func._dbus_name = func.__name__

786

1139

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

787

1140

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

788

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

789

1142

return func

1143

790

1144

return decorator

791

1145

792

1146

793

1147

def dbus_interface_annotations(dbus_interface):

794

1148

"""Decorator for marking functions returning interface annotations

795

1149

796

1150

Usage:

797

1151

798

1152

@dbus_interface_annotations("org.example.Interface")

799

1153

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

800

1154

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

801

1155

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

802

1156

"false"}

803

1157

"""

1158

804

1159

def decorator(func):

805

1160

func._dbus_is_interface = True

806

1161

func._dbus_interface = dbus_interface

807

1162

func._dbus_name = dbus_interface

808

1163

return func

1164

809

1165

return decorator

810

1166

811

1167

812

1168

def dbus_annotations(annotations):

813

1169

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

814

1170

Usage:

815

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

816

1175

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

817

1176

access="r")

818

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

819

"org.freedesktop.DBus.Property."

820

"EmitsChangedSignal": "false"})

821

1177

def Property_dbus_property(self):

822

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

823

1181

"""

1182

824

1183

def decorator(func):

825

1184

func._dbus_annotations = annotations

826

1185

return func

1186

827

1187

return decorator

828

1188

829

1189

832

1192

"""

833

1193

pass

834

1194

1195

835

1196

class DBusPropertyAccessException(DBusPropertyException):

836

1197

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

837

1198

"""

844

1205

pass

845

1206

846

1207

847

class DBusObjectWithProperties(dbus.service.Object):

848

"""A D-Bus object with properties.

849

850

Classes inheriting from this can use the dbus_service_property

851

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

852

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

1208

class DBusObjectWithAnnotations(dbus.service.Object):

1209

"""A D-Bus object with annotations.

1210

1211

Classes inheriting from this can use the dbus_annotations

1212

decorator to add annotations to methods or signals.

853

1213

"""

854

1214

855

1215

@staticmethod

856

1216

def _is_dbus_thing(thing):

857

1217

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

858

1218

859

1219

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

860

1220

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

861

1221

"""

862

1222

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

863

1223

False)

864

1224

865

1225

def _get_all_dbus_things(self, thing):

866

1226

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

867

1227

"""

868

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

869

name),

1228

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

870

1229

athing.__get__(self))

871

1230

for cls in self.__class__.__mro__

872

1231

for name, athing in

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

875

1232

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

1233

1234

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

1238

def Introspect(self, object_path, connection):

1239

"""Overloading of standard D-Bus method.

1240

1241

Inserts annotation tags on methods and signals.

1242

"""

1243

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

1244

connection)

1245

try:

1246

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

1247

1248

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

1249

# Add annotation tags

1250

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

1251

for tag in if_tag.getElementsByTagName(typ):

1252

annots = dict()

1253

for name, prop in (self.

1254

_get_all_dbus_things(typ)):

1255

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

1256

and prop._dbus_interface

1257

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

1258

annots.update(getattr(

1259

prop, "_dbus_annotations", {}))

1260

for name, value in annots.items():

1261

ann_tag = document.createElement(

1262

"annotation")

1263

ann_tag.setAttribute("name", name)

1264

ann_tag.setAttribute("value", value)

1265

tag.appendChild(ann_tag)

1266

# Add interface annotation tags

1267

for annotation, value in dict(

1268

itertools.chain.from_iterable(

1269

annotations().items()

1270

for name, annotations

1271

in self._get_all_dbus_things("interface")

1272

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

1273

)).items():

1274

ann_tag = document.createElement("annotation")

1275

ann_tag.setAttribute("name", annotation)

1276

ann_tag.setAttribute("value", value)

1277

if_tag.appendChild(ann_tag)

1278

# Fix argument name for the Introspect method itself

1279

if (if_tag.getAttribute("name")

1280

== dbus.INTROSPECTABLE_IFACE):

1281

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

1282

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

1283

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

1284

if (arg.getAttribute("direction")

1285

== "out"):

1286

arg.setAttribute("name",

1287

"xml_data")

1288

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

1289

document.unlink()

1290

except (AttributeError, xml.dom.DOMException,

1291

xml.parsers.expat.ExpatError) as error:

1292

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

1293

exc_info=error)

1294

return xmlstring

1295

1296

1297

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1298

"""A D-Bus object with properties.

1299

1300

Classes inheriting from this can use the dbus_service_property

1301

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

1302

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

1303

"""

1304

876

1305

def _get_dbus_property(self, interface_name, property_name):

877

1306

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

878

1307

property with the specified name and interface.

879

1308

"""

880

for cls in self.__class__.__mro__:

881

for name, value in (inspect.getmembers

882

(cls,

883

self._is_dbus_thing("property"))):

1309

for cls in self.__class__.__mro__:

1310

for name, value in inspect.getmembers(

1311

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

884

1312

if (value._dbus_name == property_name

885

1313

and value._dbus_interface == interface_name):

886

1314

return value.__get__(self)

887

1315

888

1316

# No such property

889

raise DBusPropertyNotFound(self.dbus_object_path + ":"

890

+ interface_name + "."

891

+ property_name)

892

893

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

1317

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

1318

self.dbus_object_path, interface_name, property_name))

1319

1320

@classmethod

1321

def _get_all_interface_names(cls):

1322

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

1323

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

1324

"_dbus_interface", None)

1325

for x in (inspect.getmro(cls))

1326

for attr in dir(x))

1327

if name is not None)

1328

1329

@dbus.service.method(dbus.PROPERTIES_IFACE,

1330

in_signature="ss",

894

1331

out_signature="v")

895

1332

def Get(self, interface_name, property_name):

896

1333

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

902

1339

if not hasattr(value, "variant_level"):

903

1340

return value

904

1341

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

905

1342

906

1343

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

907

1344

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

908

1345

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

920

1357

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

921

1358

for byte in value))

922

1359

prop(value)

923

924

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

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

925

1363

out_signature="a{sv}")

926

1364

def GetAll(self, interface_name):

927

1365

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

928

1366

standard.

929

1367

930

1368

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

931

1369

"""

932

1370

properties = {}

942

1380

if not hasattr(value, "variant_level"):

943

1381

properties[name] = value

944

1382

continue

945

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

946

value.variant_level+1)

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

947

1385

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

948

1386

1387

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

1388

def PropertiesChanged(self, interface_name, changed_properties,

1389

invalidated_properties):

1390

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

1391

standard.

1392

"""

1393

pass

1394

949

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

950

1396

out_signature="s",

951

1397

path_keyword='object_path',

952

1398

connection_keyword='connection')

953

1399

def Introspect(self, object_path, connection):

954

1400

"""Overloading of standard D-Bus method.

955

1401

956

1402

Inserts property tags and interface annotation tags.

957

1403

"""

958

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

959

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

960

1407

try:

961

1408

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

1409

962

1410

def make_tag(document, name, prop):

963

1411

e = document.createElement("property")

964

1412

e.setAttribute("name", name)

965

1413

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

966

1414

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

967

1415

return e

1416

968

1417

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

969

1418

# Add property tags

970

1419

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

973

1422

if prop._dbus_interface

974

1423

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

975

1424

if_tag.appendChild(tag)

976

# Add annotation tags

977

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

978

for tag in if_tag.getElementsByTagName(typ):

979

annots = dict()

980

for name, prop in (self.

981

_get_all_dbus_things(typ)):

982

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

983

and prop._dbus_interface

984

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

985

annots.update(getattr

986

(prop,

987

"_dbus_annotations",

988

{}))

989

for name, value in annots.items():

990

ann_tag = document.createElement(

991

"annotation")

992

ann_tag.setAttribute("name", name)

993

ann_tag.setAttribute("value", value)

994

tag.appendChild(ann_tag)

995

# Add interface annotation tags

996

for annotation, value in dict(

997

itertools.chain.from_iterable(

998

annotations().items()

999

for name, annotations in

1000

self._get_all_dbus_things("interface")

1001

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

1002

)).items():

1003

ann_tag = document.createElement("annotation")

1004

ann_tag.setAttribute("name", annotation)

1005

ann_tag.setAttribute("value", value)

1006

if_tag.appendChild(ann_tag)

1425

# Add annotation tags for properties

1426

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

1427

annots = dict()

1428

for name, prop in self._get_all_dbus_things(

1429

"property"):

1430

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

1431

and prop._dbus_interface

1432

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

1433

annots.update(getattr(

1434

prop, "_dbus_annotations", {}))

1435

for name, value in annots.items():

1436

ann_tag = document.createElement(

1437

"annotation")

1438

ann_tag.setAttribute("name", name)

1439

ann_tag.setAttribute("value", value)

1440

tag.appendChild(ann_tag)

1007

1441

# Add the names to the return values for the

1008

1442

# "org.freedesktop.DBus.Properties" methods

1009

1443

if (if_tag.getAttribute("name")

1028

1462

return xmlstring

1029

1463

1030

1464

1465

try:

1466

dbus.OBJECT_MANAGER_IFACE

1467

except AttributeError:

1468

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

1469

1470

1471

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1472

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

1473

1474

Classes inheriting from this exposes the standard

1475

GetManagedObjects call and the InterfacesAdded and

1476

InterfacesRemoved signals on the standard

1477

"org.freedesktop.DBus.ObjectManager" interface.

1478

1479

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

1480

manually.

1481

"""

1482

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1483

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

1484

def GetManagedObjects(self):

1485

"""This function must be overridden"""

1486

raise NotImplementedError()

1487

1488

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1489

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

1490

def InterfacesAdded(self, object_path, interfaces_and_properties):

1491

pass

1492

1493

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

1494

def InterfacesRemoved(self, object_path, interfaces):

1495

pass

1496

1497

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1501

def Introspect(self, object_path, connection):

1502

"""Overloading of standard D-Bus method.

1503

1504

Override return argument name of GetManagedObjects to be

1505

"objpath_interfaces_and_properties"

1506

"""

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

1510

try:

1511

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

1512

1513

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

1514

# Fix argument name for the GetManagedObjects method

1515

if (if_tag.getAttribute("name")

1516

== dbus.OBJECT_MANAGER_IFACE):

1517

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

1518

if (cn.getAttribute("name")

1519

== "GetManagedObjects"):

1520

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

1521

if (arg.getAttribute("direction")

1522

== "out"):

1523

arg.setAttribute(

1524

"name",

1525

"objpath_interfaces"

1526

"_and_properties")

1527

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

1528

document.unlink()

1529

except (AttributeError, xml.dom.DOMException,

1530

xml.parsers.expat.ExpatError) as error:

1531

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

1532

exc_info=error)

1533

return xmlstring

1534

1535

1031

1536

def datetime_to_dbus(dt, variant_level=0):

1032

1537

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

1033

1538

if dt is None:

1034

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

1035

return dbus.String(dt.isoformat(),

1036

variant_level=variant_level)

1539

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

1540

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

1037

1541

1038

1542

1039

1543

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1041

1545

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

1042

1546

interface names according to the "alt_interface_names" mapping.

1043

1547

Usage:

1044

1548

1045

1549

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

1046

1550

"net.example.AlternateInterface"})

1047

1551

class SampleDBusObject(dbus.service.Object):

1048

1552

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

1049

1553

def SampleDBusMethod():

1050

1554

pass

1051

1555

1052

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1053

1557

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

1054

1558

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

1055

1559

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

1056

1560

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

1057

1561

1058

1562

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

1059

1563

(from DBusObjectWithProperties) and interfaces (from the

1060

1564

dbus_interface_annotations decorator).

1061

1565

"""

1566

1062

1567

def wrapper(cls):

1063

1568

for orig_interface_name, alt_interface_name in (

1064

alt_interface_names.items()):

1569

alt_interface_names.items()):

1065

1570

attr = {}

1066

1571

interface_names = set()

1067

1572

# Go though all attributes of the class

1069

1574

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

1070

1575

# with the wrong interface name

1071

1576

if (not hasattr(attribute, "_dbus_interface")

1072

or not attribute._dbus_interface

1073

.startswith(orig_interface_name)):

1577

or not attribute._dbus_interface.startswith(

1578

orig_interface_name)):

1074

1579

continue

1075

1580

# Create an alternate D-Bus interface name based on

1076

1581

# the current name

1077

alt_interface = (attribute._dbus_interface

1078

.replace(orig_interface_name,

1079

alt_interface_name))

1582

alt_interface = attribute._dbus_interface.replace(

1583

orig_interface_name, alt_interface_name)

1080

1584

interface_names.add(alt_interface)

1081

1585

# Is this a D-Bus signal?

1082

1586

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

1083

1587

# Extract the original non-method undecorated

1084

1588

# function by black magic

1085

nonmethod_func = (dict(

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

1086

1591

zip(attribute.func_code.co_freevars,

1087

attribute.__closure__))["func"]

1088

.cell_contents)

1592

attribute.__closure__))

1593

["func"].cell_contents)

1594

else:

1595

nonmethod_func = (dict(

1596

zip(attribute.__code__.co_freevars,

1597

attribute.__closure__))

1598

["func"].cell_contents)

1089

1599

# Create a new, but exactly alike, function

1090

1600

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

1091

1601

# with the alternate D-Bus interface name

1092

new_function = (dbus.service.signal

1093

(alt_interface,

1094

attribute._dbus_signature)

1095

(types.FunctionType(

1096

nonmethod_func.func_code,

1097

nonmethod_func.func_globals,

1098

nonmethod_func.func_name,

1099

nonmethod_func.func_defaults,

1100

nonmethod_func.func_closure)))

1602

new_function = copy_function(nonmethod_func)

1603

new_function = (dbus.service.signal(

1604

alt_interface,

1605

attribute._dbus_signature)(new_function))

1101

1606

# Copy annotations, if any

1102

1607

try:

1103

new_function._dbus_annotations = (

1104

dict(attribute._dbus_annotations))

1608

new_function._dbus_annotations = dict(

1609

attribute._dbus_annotations)

1105

1610

except AttributeError:

1106

1611

pass

1612

1107

1613

# Define a creator of a function to call both the

1108

1614

# original and alternate functions, so both the

1109

1615

# original and alternate signals gets sent when

1112

1618

"""This function is a scope container to pass

1113

1619

func1 and func2 to the "call_both" function

1114

1620

outside of its arguments"""

1621

1622

@functools.wraps(func2)

1115

1623

def call_both(*args, **kwargs):

1116

1624

"""This function will emit two D-Bus

1117

1625

signals by calling func1 and func2"""

1118

1626

func1(*args, **kwargs)

1119

1627

func2(*args, **kwargs)

1628

# Make wrapper function look like a D-Bus

1629

# signal

1630

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

1631

if name.startswith("_dbus_"):

1632

setattr(call_both, name, attr)

1633

1120

1634

return call_both

1121

1635

# Create the "call_both" function and add it to

1122

1636

# the class

1127

1641

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

1128

1642

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

1129

1643

# to the class.

1130

attr[attrname] = (dbus.service.method

1131

(alt_interface,

1132

attribute._dbus_in_signature,

1133

attribute._dbus_out_signature)

1134

(types.FunctionType

1135

(attribute.func_code,

1136

attribute.func_globals,

1137

attribute.func_name,

1138

attribute.func_defaults,

1139

attribute.func_closure)))

1644

attr[attrname] = (

1645

dbus.service.method(

1646

alt_interface,

1647

attribute._dbus_in_signature,

1648

attribute._dbus_out_signature)

1649

(copy_function(attribute)))

1140

1650

# Copy annotations, if any

1141

1651

try:

1142

attr[attrname]._dbus_annotations = (

1143

dict(attribute._dbus_annotations))

1652

attr[attrname]._dbus_annotations = dict(

1653

attribute._dbus_annotations)

1144

1654

except AttributeError:

1145

1655

pass

1146

1656

# Is this a D-Bus property?

1149

1659

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

1150

1660

# property with the alternate D-Bus interface

1151

1661

# name. Add it to the class.

1152

attr[attrname] = (dbus_service_property

1153

(alt_interface,

1154

attribute._dbus_signature,

1155

attribute._dbus_access,

1156

attribute

1157

._dbus_get_args_options

1158

["byte_arrays"])

1159

(types.FunctionType

1160

(attribute.func_code,

1161

attribute.func_globals,

1162

attribute.func_name,

1163

attribute.func_defaults,

1164

attribute.func_closure)))

1662

attr[attrname] = (dbus_service_property(

1663

alt_interface, attribute._dbus_signature,

1664

attribute._dbus_access,

1665

attribute._dbus_get_args_options

1666

["byte_arrays"])

1667

(copy_function(attribute)))

1165

1668

# Copy annotations, if any

1166

1669

try:

1167

attr[attrname]._dbus_annotations = (

1168

dict(attribute._dbus_annotations))

1670

attr[attrname]._dbus_annotations = dict(

1671

attribute._dbus_annotations)

1169

1672

except AttributeError:

1170

1673

pass

1171

1674

# Is this a D-Bus interface?

1174

1677

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

1175

1678

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

1176

1679

# to the class.

1177

attr[attrname] = (dbus_interface_annotations

1178

(alt_interface)

1179

(types.FunctionType

1180

(attribute.func_code,

1181

attribute.func_globals,

1182

attribute.func_name,

1183

attribute.func_defaults,

1184

attribute.func_closure)))

1680

attr[attrname] = (

1681

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1185

1683

if deprecate:

1186

1684

# Deprecate all alternate interfaces

1187

iname="_AlternateDBusNames_interface_annotation{}"

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1188

1686

for interface_name in interface_names:

1687

1189

1688

@dbus_interface_annotations(interface_name)

1190

1689

def func(self):

1191

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

1192

"true" }

1690

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

1691

"true"}

1193

1692

# Find an unused name

1194

1693

for aname in (iname.format(i)

1195

1694

for i in itertools.count()):

1199

1698

if interface_names:

1200

1699

# Replace the class with a new subclass of it with

1201

1700

# methods, signals, etc. as created above.

1202

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

1203

(cls,), attr)

1701

if sys.version_info.major == 2:

1702

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

1703

(cls, ), attr)

1704

else:

1705

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

1706

(cls, ), attr)

1204

1707

return cls

1708

1205

1709

return wrapper

1206

1710

1207

1711

1208

1712

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

1209

"se.bsnet.fukt.Mandos"})

1713

"se.bsnet.fukt.Mandos"})

1210

1714

class ClientDBus(Client, DBusObjectWithProperties):

1211

1715

"""A Client class using D-Bus

1212

1716

1213

1717

Attributes:

1214

1718

dbus_object_path: dbus.ObjectPath

1215

1719

bus: dbus.SystemBus()

1216

1720

"""

1217

1721

1218

1722

runtime_expansions = (Client.runtime_expansions

1219

+ ("dbus_object_path",))

1220

1723

+ ("dbus_object_path", ))

1724

1725

_interface = "se.recompile.Mandos.Client"

1726

1221

1727

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

1222

1223

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

1728

1729

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

1224

1730

self.bus = bus

1225

1731

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

1226

1732

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

1228

1734

client_object_name = str(self.name).translate(

1229

1735

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

1230

1736

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

1231

self.dbus_object_path = (dbus.ObjectPath

1232

("/clients/" + client_object_name))

1737

self.dbus_object_path = dbus.ObjectPath(

1738

"/clients/" + client_object_name)

1233

1739

DBusObjectWithProperties.__init__(self, self.bus,

1234

1740

self.dbus_object_path)

1235

1236

def notifychangeproperty(transform_func,

1237

dbus_name, type_func=lambda x: x,

1238

variant_level=1):

1741

1742

def notifychangeproperty(transform_func, dbus_name,

1743

type_func=lambda x: x,

1744

variant_level=1,

1745

invalidate_only=False,

1746

_interface=_interface):

1239

1747

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

1240

1748

its changes to DBus.

1241

1749

1242

1750

transform_fun: Function that takes a value and a variant_level

1243

1751

and transforms it to a D-Bus type.

1244

1752

dbus_name: D-Bus name of the variable

1247

1755

variant_level: D-Bus variant level. Default: 1

1248

1756

"""

1249

1757

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

1758

1250

1759

def setter(self, value):

1251

1760

if hasattr(self, "dbus_object_path"):

1252

1761

if (not hasattr(self, attrname) or

1253

1762

type_func(getattr(self, attrname, None))

1254

1763

!= type_func(value)):

1255

dbus_value = transform_func(type_func(value),

1256

variant_level

1257

=variant_level)

1258

self.PropertyChanged(dbus.String(dbus_name),

1259

dbus_value)

1764

if invalidate_only:

1765

self.PropertiesChanged(

1766

_interface, dbus.Dictionary(),

1767

dbus.Array((dbus_name, )))

1768

else:

1769

dbus_value = transform_func(

1770

type_func(value),

1771

variant_level=variant_level)

1772

self.PropertyChanged(dbus.String(dbus_name),

1773

dbus_value)

1774

self.PropertiesChanged(

1775

_interface,

1776

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

1777

dbus_value}),

1778

dbus.Array())

1260

1779

setattr(self, attrname, value)

1261

1780

1262

1781

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

1263

1782

1264

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1265

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1266

1785

"ApprovalPending",

1267

type_func = bool)

1786

type_func=bool)

1268

1787

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

1269

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1270

1789

"LastEnabled")

1271

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

1272

type_func = lambda checker:

1273

checker is not None)

1790

checker = notifychangeproperty(

1791

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1274

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1275

1794

"LastCheckedOK")

1276

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1279

1798

datetime_to_dbus, "LastApprovalRequest")

1280

1799

approved_by_default = notifychangeproperty(dbus.Boolean,

1281

1800

"ApprovedByDefault")

1282

approval_delay = notifychangeproperty(dbus.UInt64,

1283

"ApprovalDelay",

1284

type_func =

1285

lambda td: td.total_seconds()

1286

* 1000)

1801

approval_delay = notifychangeproperty(

1802

dbus.UInt64, "ApprovalDelay",

1803

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

1287

1804

approval_duration = notifychangeproperty(

1288

1805

dbus.UInt64, "ApprovalDuration",

1289

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

1806

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

1290

1807

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

1291

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

1292

type_func = lambda td:

1293

td.total_seconds() * 1000)

1808

timeout = notifychangeproperty(

1809

dbus.UInt64, "Timeout",

1810

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

1294

1811

extended_timeout = notifychangeproperty(

1295

1812

dbus.UInt64, "ExtendedTimeout",

1296

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

1297

interval = notifychangeproperty(dbus.UInt64,

1298

"Interval",

1299

type_func =

1300

lambda td: td.total_seconds()

1301

* 1000)

1813

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

1814

interval = notifychangeproperty(

1815

dbus.UInt64, "Interval",

1816

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

1302

1817

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

1303

1818

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

1819

invalidate_only=True)

1820

1304

1821

del notifychangeproperty

1305

1822

1306

1823

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

1307

1824

try:

1308

1825

self.remove_from_connection()

1311

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1312

1829

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

1313

1830

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

1314

1315

def checker_callback(self, pid, condition, command,

1316

*args, **kwargs):

1317

self.checker_callback_tag = None

1318

self.checker = None

1319

if os.WIFEXITED(condition):

1320

exitstatus = os.WEXITSTATUS(condition)

1831

1832

def checker_callback(self, source, condition,

1833

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

1834

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

1835

connection, command, *args,

1836

**kwargs)

1837

exitstatus = self.last_checker_status

1838

if exitstatus >= 0:

1321

1839

# Emit D-Bus signal

1322

1840

self.CheckerCompleted(dbus.Int16(exitstatus),

1323

dbus.Int64(condition),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1324

1843

dbus.String(command))

1325

1844

else:

1326

1845

# Emit D-Bus signal

1327

1846

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

1328

dbus.Int64(condition),

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1329

1851

dbus.String(command))

1330

1331

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

1332

*args, **kwargs)

1333

1852

return ret

1853

1334

1854

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

1335

1855

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

1336

1856

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

1340

1860

# Emit D-Bus signal

1341

1861

self.CheckerStarted(self.current_checker_command)

1342

1862

return r

1343

1863

1344

1864

def _reset_approved(self):

1345

1865

self.approved = None

1346

1866

return False

1347

1867

1348

1868

def approve(self, value=True):

1349

1869

self.approved = value

1350

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

1351

* 1000), self._reset_approved)

1870

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

1871

* 1000), self._reset_approved)

1352

1872

self.send_changedstate()

1353

1354

## D-Bus methods, signals & properties

1355

_interface = "se.recompile.Mandos.Client"

1356

1357

## Interfaces

1358

1359

@dbus_interface_annotations(_interface)

1360

def _foo(self):

1361

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

1362

"false"}

1363

1364

## Signals

1365

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1366

1880

# CheckerCompleted - signal

1367

1881

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

1368

1882

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

1369

1883

"D-Bus signal"

1370

1884

pass

1371

1885

1372

1886

# CheckerStarted - signal

1373

1887

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

1374

1888

def CheckerStarted(self, command):

1375

1889

"D-Bus signal"

1376

1890

pass

1377

1891

1378

1892

# PropertyChanged - signal

1893

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

1379

1894

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

1380

1895

def PropertyChanged(self, property, value):

1381

1896

"D-Bus signal"

1382

1897

pass

1383

1898

1384

1899

# GotSecret - signal

1385

1900

@dbus.service.signal(_interface)

1386

1901

def GotSecret(self):

1389

1904

server to mandos-client

1390

1905

"""

1391

1906

pass

1392

1907

1393

1908

# Rejected - signal

1394

1909

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

1395

1910

def Rejected(self, reason):

1396

1911

"D-Bus signal"

1397

1912

pass

1398

1913

1399

1914

# NeedApproval - signal

1400

1915

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

1401

1916

def NeedApproval(self, timeout, default):

1402

1917

"D-Bus signal"

1403

1918

return self.need_approval()

1404

1405

## Methods

1406

1919

1920

# Methods

1921

1407

1922

# Approve - method

1408

1923

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

1409

1924

def Approve(self, value):

1410

1925

self.approve(value)

1411

1926

1412

1927

# CheckedOK - method

1413

1928

@dbus.service.method(_interface)

1414

1929

def CheckedOK(self):

1415

1930

self.checked_ok()

1416

1931

1417

1932

# Enable - method

1933

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

1418

1934

@dbus.service.method(_interface)

1419

1935

def Enable(self):

1420

1936

"D-Bus method"

1421

1937

self.enable()

1422

1938

1423

1939

# StartChecker - method

1940

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

1424

1941

@dbus.service.method(_interface)

1425

1942

def StartChecker(self):

1426

1943

"D-Bus method"

1427

1944

self.start_checker()

1428

1945

1429

1946

# Disable - method

1947

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

1430

1948

@dbus.service.method(_interface)

1431

1949

def Disable(self):

1432

1950

"D-Bus method"

1433

1951

self.disable()

1434

1952

1435

1953

# StopChecker - method

1954

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

1436

1955

@dbus.service.method(_interface)

1437

1956

def StopChecker(self):

1438

1957

self.stop_checker()

1439

1440

## Properties

1441

1958

1959

# Properties

1960

1442

1961

# ApprovalPending - property

1443

1962

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

1444

1963

def ApprovalPending_dbus_property(self):

1445

1964

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

1446

1965

1447

1966

# ApprovedByDefault - property

1448

@dbus_service_property(_interface, signature="b",

1967

@dbus_service_property(_interface,

1968

signature="b",

1449

1969

access="readwrite")

1450

1970

def ApprovedByDefault_dbus_property(self, value=None):

1451

1971

if value is None: # get

1452

1972

return dbus.Boolean(self.approved_by_default)

1453

1973

self.approved_by_default = bool(value)

1454

1974

1455

1975

# ApprovalDelay - property

1456

@dbus_service_property(_interface, signature="t",

1976

@dbus_service_property(_interface,

1977

signature="t",

1457

1978

access="readwrite")

1458

1979

def ApprovalDelay_dbus_property(self, value=None):

1459

1980

if value is None: # get

1460

1981

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

1461

1982

* 1000)

1462

1983

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

1463

1984

1464

1985

# ApprovalDuration - property

1465

@dbus_service_property(_interface, signature="t",

1986

@dbus_service_property(_interface,

1987

signature="t",

1466

1988

access="readwrite")

1467

1989

def ApprovalDuration_dbus_property(self, value=None):

1468

1990

if value is None: # get

1469

1991

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

1470

1992

* 1000)

1471

1993

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

1472

1994

1473

1995

# Name - property

1996

@dbus_annotations(

1997

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

1474

1998

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

1475

1999

def Name_dbus_property(self):

1476

2000

return dbus.String(self.name)

1477

2001

1478

2002

# Fingerprint - property

2003

@dbus_annotations(

2004

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

1479

2005

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

1480

2006

def Fingerprint_dbus_property(self):

1481

2007

return dbus.String(self.fingerprint)

1482

2008

1483

2009

# Host - property

1484

@dbus_service_property(_interface, signature="s",

2010

@dbus_service_property(_interface,

2011

signature="s",

1485

2012

access="readwrite")

1486

2013

def Host_dbus_property(self, value=None):

1487

2014

if value is None: # get

1488

2015

return dbus.String(self.host)

1489

2016

self.host = str(value)

1490

2017

1491

2018

# Created - property

2019

@dbus_annotations(

2020

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

1492

2021

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

1493

2022

def Created_dbus_property(self):

1494

2023

return datetime_to_dbus(self.created)

1495

2024

1496

2025

# LastEnabled - property

1497

2026

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

1498

2027

def LastEnabled_dbus_property(self):

1499

2028

return datetime_to_dbus(self.last_enabled)

1500

2029

1501

2030

# Enabled - property

1502

@dbus_service_property(_interface, signature="b",

2031

@dbus_service_property(_interface,

2032

signature="b",

1503

2033

access="readwrite")

1504

2034

def Enabled_dbus_property(self, value=None):

1505

2035

if value is None: # get

1508

2038

self.enable()

1509

2039

else:

1510

2040

self.disable()

1511

2041

1512

2042

# LastCheckedOK - property

1513

@dbus_service_property(_interface, signature="s",

2043

@dbus_service_property(_interface,

2044

signature="s",

1514

2045

access="readwrite")

1515

2046

def LastCheckedOK_dbus_property(self, value=None):

1516

2047

if value is not None:

1517

2048

self.checked_ok()

1518

2049

return

1519

2050

return datetime_to_dbus(self.last_checked_ok)

1520

2051

1521

2052

# LastCheckerStatus - property

1522

@dbus_service_property(_interface, signature="n",

1523

access="read")

2053

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

1524

2054

def LastCheckerStatus_dbus_property(self):

1525

2055

return dbus.Int16(self.last_checker_status)

1526

2056

1527

2057

# Expires - property

1528

2058

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

1529

2059

def Expires_dbus_property(self):

1530

2060

return datetime_to_dbus(self.expires)

1531

2061

1532

2062

# LastApprovalRequest - property

1533

2063

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

1534

2064

def LastApprovalRequest_dbus_property(self):

1535

2065

return datetime_to_dbus(self.last_approval_request)

1536

2066

1537

2067

# Timeout - property

1538

@dbus_service_property(_interface, signature="t",

2068

@dbus_service_property(_interface,

2069

signature="t",

1539

2070

access="readwrite")

1540

2071

def Timeout_dbus_property(self, value=None):

1541

2072

if value is None: # get

1553

2084

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

1554

2085

is None):

1555

2086

return

1556

gobject.source_remove(self.disable_initiator_tag)

1557

self.disable_initiator_tag = (

1558

gobject.timeout_add(

1559

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

1560

* 1000), self.disable))

1561

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

2089

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

2090

self.disable)

2091

1562

2092

# ExtendedTimeout - property

1563

@dbus_service_property(_interface, signature="t",

2093

@dbus_service_property(_interface,

2094

signature="t",

1564

2095

access="readwrite")

1565

2096

def ExtendedTimeout_dbus_property(self, value=None):

1566

2097

if value is None: # get

1567

2098

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

1568

2099

* 1000)

1569

2100

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

1570

2101

1571

2102

# Interval - property

1572

@dbus_service_property(_interface, signature="t",

2103

@dbus_service_property(_interface,

2104

signature="t",

1573

2105

access="readwrite")

1574

2106

def Interval_dbus_property(self, value=None):

1575

2107

if value is None: # get

1579

2111

return

1580

2112

if self.enabled:

1581

2113

# Reschedule checker run

1582

gobject.source_remove(self.checker_initiator_tag)

1583

self.checker_initiator_tag = (gobject.timeout_add

1584

(value, self.start_checker))

1585

self.start_checker() # Start one now, too

1586

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

2116

value, self.start_checker)

2117

self.start_checker() # Start one now, too

2118

1587

2119

# Checker - property

1588

@dbus_service_property(_interface, signature="s",

2120

@dbus_service_property(_interface,

2121

signature="s",

1589

2122

access="readwrite")

1590

2123

def Checker_dbus_property(self, value=None):

1591

2124

if value is None: # get

1592

2125

return dbus.String(self.checker_command)

1593

2126

self.checker_command = str(value)

1594

2127

1595

2128

# CheckerRunning - property

1596

@dbus_service_property(_interface, signature="b",

2129

@dbus_service_property(_interface,

2130

signature="b",

1597

2131

access="readwrite")

1598

2132

def CheckerRunning_dbus_property(self, value=None):

1599

2133

if value is None: # get

1602

2136

self.start_checker()

1603

2137

else:

1604

2138

self.stop_checker()

1605

2139

1606

2140

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

1607

2144

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

1608

2145

def ObjectPath_dbus_property(self):

1609

return self.dbus_object_path # is already a dbus.ObjectPath

1610

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1611

2148

# Secret = property

1612

@dbus_service_property(_interface, signature="ay",

1613

access="write", byte_arrays=True)

2149

@dbus_annotations(

2150

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

2151

"invalidates"})

2152

@dbus_service_property(_interface,

2153

signature="ay",

2154

access="write",

2155

byte_arrays=True)

1614

2156

def Secret_dbus_property(self, value):

1615

2157

self.secret = bytes(value)

1616

2158

1617

2159

del _interface

1618

2160

1619

2161

1622

2164

self._pipe = child_pipe

1623

2165

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

1624

2166

if not self._pipe.recv():

1625

raise KeyError()

1626

2167

raise KeyError(fpr)

2168

1627

2169

def __getattribute__(self, name):

1628

2170

if name == '_pipe':

1629

2171

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

1632

2174

if data[0] == 'data':

1633

2175

return data[1]

1634

2176

if data[0] == 'function':

2177

1635

2178

def func(*args, **kwargs):

1636

2179

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

1637

2180

return self._pipe.recv()[1]

2181

1638

2182

return func

1639

2183

1640

2184

def __setattr__(self, name, value):

1641

2185

if name == '_pipe':

1642

2186

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

1645

2189

1646

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1647

2191

"""A class to handle client connections.

1648

2192

1649

2193

Instantiated once for each connection to handle it.

1650

2194

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

1651

2195

1652

2196

def handle(self):

1653

2197

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

1654

2198

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

1655

2199

str(self.client_address))

1656

2200

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

1657

2201

self.server.child_pipe.fileno())

1658

1659

session = (gnutls.connection

1660

.ClientSession(self.request,

1661

gnutls.connection

1662

.X509Credentials()))

1663

1664

# Note: gnutls.connection.X509Credentials is really a

1665

# generic GnuTLS certificate credentials object so long as

1666

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

1667

# here despite using OpenPGP certificates.

1668

1669

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

1670

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

1671

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

1672

# "+DHE-DSS"))

2202

2203

session = gnutls.ClientSession(self.request)

2204

2205

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

2206

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

2207

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

2208

# "+DHE-DSS"))

1673

2209

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

1674

2210

priority = self.server.gnutls_priority

1675

2211

if priority is None:

1676

2212

priority = "NORMAL"

1677

(gnutls.library.functions

1678

.gnutls_priority_set_direct(session._c_object,

1679

priority, None))

1680

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1681

2217

# Start communication using the Mandos protocol

1682

2218

# Get protocol number

1683

2219

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

1688

2224

except (ValueError, IndexError, RuntimeError) as error:

1689

2225

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

1690

2226

return

1691

2227

1692

2228

# Start GnuTLS connection

1693

2229

try:

1694

2230

session.handshake()

1695

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1696

2232

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

1697

2233

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

1698

2234

# established. Just abandon the request.

1699

2235

return

1700

2236

logger.debug("Handshake succeeded")

1701

2237

1702

2238

approval_required = False

1703

2239

try:

1704

2240

try:

1705

fpr = self.fingerprint(self.peer_certificate

1706

(session))

1707

except (TypeError,

1708

gnutls.errors.GNUTLSError) as error:

2241

fpr = self.fingerprint(

2242

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1709

2244

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

1710

2245

return

1711

2246

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

1712

2247

1713

2248

try:

1714

2249

client = ProxyClient(child_pipe, fpr,

1715

2250

self.client_address)

1716

2251

except KeyError:

1717

2252

return

1718

2253

1719

2254

if client.approval_delay:

1720

2255

delay = client.approval_delay

1721

2256

client.approvals_pending += 1

1722

2257

approval_required = True

1723

2258

1724

2259

while True:

1725

2260

if not client.enabled:

1726

2261

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

1727

client.name)

2262

client.name)

1728

2263

if self.server.use_dbus:

1729

2264

# Emit D-Bus signal

1730

2265

client.Rejected("Disabled")

1731

2266

return

1732

2267

1733

2268

if client.approved or not client.approval_delay:

1734

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1735

2270

break

1736

2271

elif client.approved is None:

1737

2272

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

1748

2283

# Emit D-Bus signal

1749

2284

client.Rejected("Denied")

1750

2285

return

1751

1752

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1753

2288

time = datetime.datetime.now()

1754

2289

client.changedstate.acquire()

1755

2290

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

1768

2303

break

1769

2304

else:

1770

2305

delay -= time2 - time

1771

1772

sent_size = 0

1773

while sent_size < len(client.secret):

1774

try:

1775

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

1776

except gnutls.errors.GNUTLSError as error:

1777

logger.warning("gnutls send failed",

1778

exc_info=error)

1779

return

1780

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

1781

sent, len(client.secret)

1782

- (sent_size + sent))

1783

sent_size += sent

1784

2306

2307

try:

2308

session.send(client.secret)

2309

except gnutls.Error as error:

2310

logger.warning("gnutls send failed",

2311

exc_info=error)

2312

return

2313

1785

2314

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

1786

2315

# bump the timeout using extended_timeout

1787

2316

client.bump_timeout(client.extended_timeout)

1788

2317

if self.server.use_dbus:

1789

2318

# Emit D-Bus signal

1790

2319

client.GotSecret()

1791

2320

1792

2321

finally:

1793

2322

if approval_required:

1794

2323

client.approvals_pending -= 1

1795

2324

try:

1796

2325

session.bye()

1797

except gnutls.errors.GNUTLSError as error:

2326

except gnutls.Error as error:

1798

2327

logger.warning("GnuTLS bye failed",

1799

2328

exc_info=error)

1800

2329

1801

2330

@staticmethod

1802

2331

def peer_certificate(session):

1803

2332

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

1804

2333

# If not an OpenPGP certificate...

1805

if (gnutls.library.functions

1806

.gnutls_certificate_type_get(session._c_object)

1807

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1808

# ...do the normal thing

1809

return session.peer_certificate

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1810

2338

list_size = ctypes.c_uint(1)

1811

cert_list = (gnutls.library.functions

1812

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

1813

2340

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

1814

2341

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

1815

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

1816

" certificate")

2342

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

1817

2343

if list_size.value == 0:

1818

2344

return None

1819

2345

cert = cert_list[0]

1820

2346

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

1821

2347

1822

2348

@staticmethod

1823

2349

def fingerprint(openpgp):

1824

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1825

2351

# New GnuTLS "datum" with the OpenPGP public key

1826

datum = (gnutls.library.types

1827

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

1828

ctypes.POINTER

1829

(ctypes.c_ubyte)),

1830

ctypes.c_uint(len(openpgp))))

2352

datum = gnutls.datum_t(

2353

ctypes.cast(ctypes.c_char_p(openpgp),

2354

ctypes.POINTER(ctypes.c_ubyte)),

2355

ctypes.c_uint(len(openpgp)))

1831

2356

# New empty GnuTLS certificate

1832

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1835

2359

# Import the OpenPGP public key into the certificate

1836

(gnutls.library.functions

1837

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

1838

gnutls.library.constants

1839

.GNUTLS_OPENPGP_FMT_RAW))

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1840

2362

# Verify the self signature in the key

1841

2363

crtverify = ctypes.c_uint()

1842

(gnutls.library.functions

1843

.gnutls_openpgp_crt_verify_self(crt, 0,

1844

ctypes.byref(crtverify)))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1845

2366

if crtverify.value != 0:

1846

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1847

raise (gnutls.errors.CertificateSecurityError

1848

("Verify failed"))

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError("Verify failed")

1849

2369

# New buffer for the fingerprint

1850

2370

buf = ctypes.create_string_buffer(20)

1851

2371

buf_len = ctypes.c_size_t()

1852

2372

# Get the fingerprint from the certificate into the buffer

1853

(gnutls.library.functions

1854

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

1855

ctypes.byref(buf_len)))

2373

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

2374

ctypes.byref(buf_len))

1856

2375

# Deinit the certificate

1857

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2376

gnutls.openpgp_crt_deinit(crt)

1858

2377

# Convert the buffer to a Python bytestring

1859

2378

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

1860

2379

# Convert the bytestring to hexadecimal notation

1864

2383

1865

2384

class MultiprocessingMixIn(object):

1866

2385

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

2386

1867

2387

def sub_process_main(self, request, address):

1868

2388

try:

1869

2389

self.finish_request(request, address)

1870

2390

except Exception:

1871

2391

self.handle_error(request, address)

1872

2392

self.close_request(request)

1873

2393

1874

2394

def process_request(self, request, address):

1875

2395

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

1876

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

1877

args = (request, address))

2396

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

2397

args=(request, address))

1878

2398

proc.start()

1879

2399

return proc

1880

2400

1881

2401

1882

2402

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1883

2403

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

2404

1884

2405

def process_request(self, request, client_address):

1885

2406

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

1886

2407

1887

2408

This function creates a new pipe in self.pipe

1888

2409

"""

1889

2410

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1890

2411

1891

2412

proc = MultiprocessingMixIn.process_request(self, request,

1892

2413

client_address)

1893

2414

self.child_pipe.close()

1894

2415

self.add_pipe(parent_pipe, proc)

1895

2416

1896

2417

def add_pipe(self, parent_pipe, proc):

1897

2418

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

1898

2419

raise NotImplementedError()

1901

2422

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1902

2423

socketserver.TCPServer, object):

1903

2424

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

1904

2425

1905

2426

Attributes:

1906

2427

enabled: Boolean; whether this server is activated yet

1907

2428

interface: None or a network interface name (string)

1908

2429

use_ipv6: Boolean; to use IPv6 or not

1909

2430

"""

2431

1910

2432

def __init__(self, server_address, RequestHandlerClass,

1911

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

2433

interface=None,

2434

use_ipv6=True,

2435

socketfd=None):

1912

2436

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

1913

2437

creating a new one with socket.socket().

1914

2438

"""

1920

2444

self.socketfd = socketfd

1921

2445

# Save the original socket.socket() function

1922

2446

self.socket_socket = socket.socket

2447

1923

2448

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

1924

#

2449

#

1925

2450

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

1926

2451

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

1927

2452

# patching socket.socket.)

1928

#

2453

#

1929

2454

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

1930

2455

@functools.wraps(socket.socket)

1931

2456

def socket_wrapper(*args, **kwargs):

1943

2468

# socket_wrapper(), if socketfd was set.

1944

2469

socketserver.TCPServer.__init__(self, server_address,

1945

2470

RequestHandlerClass)

1946

2471

1947

2472

def server_bind(self):

1948

2473

"""This overrides the normal server_bind() function

1949

2474

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

1950

2475

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

2476

global SO_BINDTODEVICE

1951

2477

if self.interface is not None:

1952

2478

if SO_BINDTODEVICE is None:

1953

logger.error("SO_BINDTODEVICE does not exist;"

1954

" cannot bind to interface %s",

1955

self.interface)

1956

else:

1957

try:

1958

self.socket.setsockopt(socket.SOL_SOCKET,

1959

SO_BINDTODEVICE,

1960

(self.interface + "\0")

1961

.encode("utf-8"))

1962

except socket.error as error:

1963

if error.errno == errno.EPERM:

1964

logger.error("No permission to bind to"

1965

" interface %s", self.interface)

1966

elif error.errno == errno.ENOPROTOOPT:

1967

logger.error("SO_BINDTODEVICE not available;"

1968

" cannot bind to interface %s",

1969

self.interface)

1970

elif error.errno == errno.ENODEV:

1971

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

1972

" cannot bind", self.interface)

1973

else:

1974

raise

2479

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

2480

# common enough.

2481

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

2482

SO_BINDTODEVICE = 25

2483

try:

2484

self.socket.setsockopt(

2485

socket.SOL_SOCKET, SO_BINDTODEVICE,

2486

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

2487

except socket.error as error:

2488

if error.errno == errno.EPERM:

2489

logger.error("No permission to bind to"

2490

" interface %s", self.interface)

2491

elif error.errno == errno.ENOPROTOOPT:

2492

logger.error("SO_BINDTODEVICE not available;"

2493

" cannot bind to interface %s",

2494

self.interface)

2495

elif error.errno == errno.ENODEV:

2496

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

2497

" cannot bind", self.interface)

2498

else:

2499

raise

1975

2500

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

1976

2501

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

1977

2502

if not self.server_address[0]:

1978

2503

if self.address_family == socket.AF_INET6:

1979

any_address = "::" # in6addr_any

2504

any_address = "::" # in6addr_any

1980

2505

else:

1981

any_address = "0.0.0.0" # INADDR_ANY

2506

any_address = "0.0.0.0" # INADDR_ANY

1982

2507

self.server_address = (any_address,

1983

2508

self.server_address[1])

1984

2509

elif not self.server_address[1]:

1985

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

1986

0)

2510

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

1987

2511

# if self.interface:

1988

2512

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

1989

2513

# 0, # port

1995

2519

1996

2520

class MandosServer(IPv6_TCPServer):

1997

2521

"""Mandos server.

1998

2522

1999

2523

Attributes:

2000

2524

clients: set of Client objects

2001

2525

gnutls_priority GnuTLS priority string

2002

2526

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

2003

2004

Assumes a gobject.MainLoop event loop.

2527

2528

Assumes a GLib.MainLoop event loop.

2005

2529

"""

2530

2006

2531

def __init__(self, server_address, RequestHandlerClass,

2007

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

2008

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

2532

interface=None,

2533

use_ipv6=True,

2534

clients=None,

2535

gnutls_priority=None,

2536

use_dbus=True,

2537

socketfd=None):

2009

2538

self.enabled = False

2010

2539

self.clients = clients

2011

2540

if self.clients is None:

2014

2543

self.gnutls_priority = gnutls_priority

2015

2544

IPv6_TCPServer.__init__(self, server_address,

2016

2545

RequestHandlerClass,

2017

interface = interface,

2018

use_ipv6 = use_ipv6,

2019

socketfd = socketfd)

2546

interface=interface,

2547

use_ipv6=use_ipv6,

2548

socketfd=socketfd)

2549

2020

2550

def server_activate(self):

2021

2551

if self.enabled:

2022

2552

return socketserver.TCPServer.server_activate(self)

2023

2553

2024

2554

def enable(self):

2025

2555

self.enabled = True

2026

2556

2027

2557

def add_pipe(self, parent_pipe, proc):

2028

2558

# Call "handle_ipc" for both data and EOF events

2029

gobject.io_add_watch(parent_pipe.fileno(),

2030

gobject.IO_IN | gobject.IO_HUP,

2031

functools.partial(self.handle_ipc,

2032

parent_pipe =

2033

parent_pipe,

2034

proc = proc))

2035

2036

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

2037

proc = None, client_object=None):

2559

GLib.io_add_watch(

2560

parent_pipe.fileno(),

2561

GLib.IO_IN | GLib.IO_HUP,

2562

functools.partial(self.handle_ipc,

2563

parent_pipe=parent_pipe,

2564

proc=proc))

2565

2566

def handle_ipc(self, source, condition,

2567

parent_pipe=None,

2568

proc=None,

2569

client_object=None):

2038

2570

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

2039

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

2571

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

2040

2572

# Wait for other process to exit

2041

2573

proc.join()

2042

2574

return False

2043

2575

2044

2576

# Read a request from the child

2045

2577

request = parent_pipe.recv()

2046

2578

command = request[0]

2047

2579

2048

2580

if command == 'init':

2049

fpr = request[1]

2581

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

2050

2582

address = request[2]

2051

2052

for c in self.clients.itervalues():

2583

2584

for c in self.clients.values():

2053

2585

if c.fingerprint == fpr:

2054

2586

client = c

2055

2587

break

2062

2594

address[0])

2063

2595

parent_pipe.send(False)

2064

2596

return False

2065

2066

gobject.io_add_watch(parent_pipe.fileno(),

2067

gobject.IO_IN | gobject.IO_HUP,

2068

functools.partial(self.handle_ipc,

2069

parent_pipe =

2070

parent_pipe,

2071

proc = proc,

2072

client_object =

2073

client))

2597

2598

GLib.io_add_watch(

2599

parent_pipe.fileno(),

2600

GLib.IO_IN | GLib.IO_HUP,

2601

functools.partial(self.handle_ipc,

2602

parent_pipe=parent_pipe,

2603

proc=proc,

2604

client_object=client))

2074

2605

parent_pipe.send(True)

2075

2606

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

2076

2607

# same fileno

2079

2610

funcname = request[1]

2080

2611

args = request[2]

2081

2612

kwargs = request[3]

2082

2613

2083

2614

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

2084

2615

funcname)(*args,

2085

**kwargs)))

2086

2616

**kwargs)))

2617

2087

2618

if command == 'getattr':

2088

2619

attrname = request[1]

2089

if callable(client_object.__getattribute__(attrname)):

2090

parent_pipe.send(('function',))

2620

if isinstance(client_object.__getattribute__(attrname),

2621

collections.Callable):

2622

parent_pipe.send(('function', ))

2091

2623

else:

2092

parent_pipe.send(('data', client_object

2093

.__getattribute__(attrname)))

2094

2624

parent_pipe.send((

2625

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

2626

2095

2627

if command == 'setattr':

2096

2628

attrname = request[1]

2097

2629

value = request[2]

2098

2630

setattr(client_object, attrname, value)

2099

2631

2100

2632

return True

2101

2633

2102

2634

2103

2635

def rfc3339_duration_to_delta(duration):

2104

2636

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

2105

2637

2106

2638

>>> rfc3339_duration_to_delta("P7D")

2107

2639

datetime.timedelta(7)

2108

2640

>>> rfc3339_duration_to_delta("PT60S")

2118

2650

>>> rfc3339_duration_to_delta("P1DT3M20S")

2119

2651

datetime.timedelta(1, 200)

2120

2652

"""

2121

2653

2122

2654

# Parsing an RFC 3339 duration with regular expressions is not

2123

2655

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

2124

2656

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

2125

2657

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

2126

2658

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

2127

2659

# avoid excessive use of external libraries.

2128

2660

2129

2661

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

2130

Token = collections.namedtuple("Token",

2131

("regexp", # To match token; if

2132

# "value" is not None,

2133

# must have a "group"

2134

# containing digits

2135

"value", # datetime.timedelta or

2136

# None

2137

"followers")) # Tokens valid after

2138

# this token

2662

Token = collections.namedtuple("Token", (

2663

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

2664

# a "group" containing digits

2665

"value", # datetime.timedelta or None

2666

"followers")) # Tokens valid after this token

2139

2667

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

2140

2668

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

2141

2669

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

2142

2670

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

2143

2671

datetime.timedelta(seconds=1),

2144

frozenset((token_end,)))

2672

frozenset((token_end, )))

2145

2673

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

2146

2674

datetime.timedelta(minutes=1),

2147

2675

frozenset((token_second, token_end)))

2163

2691

frozenset((token_month, token_end)))

2164

2692

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

2165

2693

datetime.timedelta(weeks=1),

2166

frozenset((token_end,)))

2694

frozenset((token_end, )))

2167

2695

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

2168

2696

frozenset((token_year, token_month,

2169

2697

token_day, token_time,

2170

2698

token_week)))

2171

# Define starting values

2172

value = datetime.timedelta() # Value so far

2699

# Define starting values:

2700

# Value so far

2701

value = datetime.timedelta()

2173

2702

found_token = None

2174

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

2175

s = duration # String left to parse

2703

# Following valid tokens

2704

followers = frozenset((token_duration, ))

2705

# String left to parse

2706

s = duration

2176

2707

# Loop until end token is found

2177

2708

while found_token is not token_end:

2178

2709

# Search for any currently valid tokens

2194

2725

break

2195

2726

else:

2196

2727

# No currently valid tokens were found

2197

raise ValueError("Invalid RFC 3339 duration")

2728

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

2729

.format(duration))

2198

2730

# End token found

2199

2731

return value

2200

2732

2201

2733

2202

2734

def string_to_delta(interval):

2203

2735

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

2204

2736

2205

2737

>>> string_to_delta('7d')

2206

2738

datetime.timedelta(7)

2207

2739

>>> string_to_delta('60s')

2215

2747

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

2216

2748

datetime.timedelta(0, 330)

2217

2749

"""

2218

2750

2219

2751

try:

2220

2752

return rfc3339_duration_to_delta(interval)

2221

2753

except ValueError:

2222

2754

pass

2223

2755

2224

2756

timevalue = datetime.timedelta(0)

2225

2757

for s in interval.split():

2226

2758

try:

2237

2769

elif suffix == "w":

2238

2770

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

2239

2771

else:

2240

raise ValueError("Unknown suffix {!r}"

2241

.format(suffix))

2772

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

2242

2773

except IndexError as e:

2243

2774

raise ValueError(*(e.args))

2244

2775

timevalue += delta

2245

2776

return timevalue

2246

2777

2247

2778

2248

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

2779

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

2249

2780

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

2250

2781

2251

2782

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

2252

2783

if os.fork():

2253

2784

sys.exit()

2260

2791

# Close all standard open file descriptors

2261

2792

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

2262

2793

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

2263

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

2794

raise OSError(errno.ENODEV,

2795

"{} not a character device"

2264

2796

.format(os.devnull))

2265

2797

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

2266

2798

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

2270

2802

2271

2803

2272

2804

def main():

2273

2805

2274

2806

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

2275

2807

# Parsing of options, both command line and config file

2276

2808

2277

2809

parser = argparse.ArgumentParser()

2278

2810

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

2279

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

2811

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

2280

2812

help="show version number and exit")

2281

2813

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

2282

2814

help="Bind to interface IF")

2318

2850

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

2319

2851

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

2320

2852

default=None)

2321

2853

2322

2854

options = parser.parse_args()

2323

2855

2324

2856

if options.check:

2325

2857

import doctest

2326

2858

fail_count, test_count = doctest.testmod()

2327

2859

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

2328

2860

2329

2861

# Default values for config file for server-global settings

2330

server_defaults = { "interface": "",

2331

"address": "",

2332

"port": "",

2333

"debug": "False",

2334

"priority":

2335

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

2336

"servicename": "Mandos",

2337

"use_dbus": "True",

2338

"use_ipv6": "True",

2339

"debuglevel": "",

2340

"restore": "True",

2341

"socket": "",

2342

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

2343

"foreground": "False",

2344

"zeroconf": "True",

2345

}

2346

2862

server_defaults = {"interface": "",

2863

"address": "",

2864

"port": "",

2865

"debug": "False",

2866

"priority":

2867

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

2868

":+SIGN-DSA-SHA256",

2869

"servicename": "Mandos",

2870

"use_dbus": "True",

2871

"use_ipv6": "True",

2872

"debuglevel": "",

2873

"restore": "True",

2874

"socket": "",

2875

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

2876

"foreground": "False",

2877

"zeroconf": "True",

2878

}

2879

2347

2880

# Parse config file for server-global settings

2348

2881

server_config = configparser.SafeConfigParser(server_defaults)

2349

2882

del server_defaults

2350

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

2351

"mandos.conf"))

2883

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

2352

2884

# Convert the SafeConfigParser object to a dict

2353

2885

server_settings = server_config.defaults()

2354

2886

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

2355

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

2887

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

2888

"foreground", "zeroconf"):

2356

2889

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

2357

2890

option)

2358

2891

if server_settings["port"]:

2368

2901

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

2369

2902

["socket"])

2370

2903

del server_config

2371

2904

2372

2905

# Override the settings from the config file with command line

2373

2906

# options, if set.

2374

2907

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

2375

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

2376

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

2377

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

2908

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

2909

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

2910

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

2378

2911

value = getattr(options, option)

2379

2912

if value is not None:

2380

2913

server_settings[option] = value

2392

2925

if server_settings["debug"]:

2393

2926

server_settings["foreground"] = True

2394

2927

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

2395

2928

2396

2929

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

2397

2398

if (not server_settings["zeroconf"] and

2399

not (server_settings["port"]

2400

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

2401

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

2402

" Zeroconf")

2403

2930

2931

if (not server_settings["zeroconf"]

2932

and not (server_settings["port"]

2933

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

2934

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

2935

2404

2936

# For convenience

2405

2937

debug = server_settings["debug"]

2406

2938

debuglevel = server_settings["debuglevel"]

2410

2942

stored_state_file)

2411

2943

foreground = server_settings["foreground"]

2412

2944

zeroconf = server_settings["zeroconf"]

2413

2945

2414

2946

if debug:

2415

2947

initlogger(debug, logging.DEBUG)

2416

2948

else:

2419

2951

else:

2420

2952

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

2421

2953

initlogger(debug, level)

2422

2954

2423

2955

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

2424

syslogger.setFormatter(logging.Formatter

2425

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

2426

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

2427

.format(server_settings

2428

["servicename"])))

2429

2956

syslogger.setFormatter(

2957

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

2958

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

2959

server_settings["servicename"])))

2960

2430

2961

# Parse config file with clients

2431

2962

client_config = configparser.SafeConfigParser(Client

2432

2963

.client_defaults)

2433

2964

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

2434

2965

"clients.conf"))

2435

2966

2436

2967

global mandos_dbus_service

2437

2968

mandos_dbus_service = None

2438

2969

2439

2970

socketfd = None

2440

2971

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

2441

2972

socketfd = server_settings["socket"]

2442

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

2443

server_settings["port"]),

2444

ClientHandler,

2445

interface=(server_settings["interface"]

2446

or None),

2447

use_ipv6=use_ipv6,

2448

gnutls_priority=

2449

server_settings["priority"],

2450

use_dbus=use_dbus,

2451

socketfd=socketfd)

2973

tcp_server = MandosServer(

2974

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

2975

ClientHandler,

2976

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

2977

use_ipv6=use_ipv6,

2978

gnutls_priority=server_settings["priority"],

2979

use_dbus=use_dbus,

2980

socketfd=socketfd)

2452

2981

if not foreground:

2453

2982

pidfilename = "/run/mandos.pid"

2454

2983

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

2455

2984

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

2456

2985

pidfile = None

2457

2986

try:

2458

pidfile = open(pidfilename, "w")

2987

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

2459

2988

except IOError as e:

2460

2989

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

2461

2990

exc_info=e)

2462

2463

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

2991

2992

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

2993

("mandos", "mandos"),

2994

("nobody", "nogroup")):

2464

2995

try:

2465

2996

uid = pwd.getpwnam(name).pw_uid

2466

gid = pwd.getpwnam(name).pw_gid

2997

gid = pwd.getpwnam(group).pw_gid

2467

2998

break

2468

2999

except KeyError:

2469

3000

continue

2473

3004

try:

2474

3005

os.setgid(gid)

2475

3006

os.setuid(uid)

3007

if debug:

3008

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

3009

gid))

2476

3010

except OSError as error:

3011

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

3012

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

2477

3013

if error.errno != errno.EPERM:

2478

3014

raise

2479

3015

2480

3016

if debug:

2481

3017

# Enable all possible GnuTLS debugging

2482

3018

2483

3019

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

2484

3020

# - GnuTLS manual

2485

gnutls.library.functions.gnutls_global_set_log_level(11)

2486

2487

@gnutls.library.types.gnutls_log_func

3021

gnutls.global_set_log_level(11)

3022

3023

@gnutls.log_func

2488

3024

def debug_gnutls(level, string):

2489

3025

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

2490

2491

(gnutls.library.functions

2492

.gnutls_global_set_log_function(debug_gnutls))

2493

3026

3027

gnutls.global_set_log_function(debug_gnutls)

3028

2494

3029

# Redirect stdin so all checkers get /dev/null

2495

3030

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

2496

3031

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

2497

3032

if null > 2:

2498

3033

os.close(null)

2499

3034

2500

3035

# Need to fork before connecting to D-Bus

2501

3036

if not foreground:

2502

3037

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

2503

3038

daemon()

2504

2505

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

2506

# need to inform gobject that threads will be used.

2507

gobject.threads_init()

2508

3039

3040

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

3041

# to inform GLib that threads will be used.

3042

GLib.threads_init()

3043

2509

3044

global main_loop

2510

3045

# From the Avahi example code

2511

3046

DBusGMainLoop(set_as_default=True)

2512

main_loop = gobject.MainLoop()

3047

main_loop = GLib.MainLoop()

2513

3048

bus = dbus.SystemBus()

2514

3049

# End of Avahi example code

2515

3050

if use_dbus:

2516

3051

try:

2517

3052

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

2518

bus, do_not_queue=True)

2519

old_bus_name = (dbus.service.BusName

2520

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

2521

do_not_queue=True))

2522

except dbus.exceptions.NameExistsException as e:

3053

bus,

3054

do_not_queue=True)

3055

old_bus_name = dbus.service.BusName(

3056

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

3057

do_not_queue=True)

3058

except dbus.exceptions.DBusException as e:

2523

3059

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

2524

3060

use_dbus = False

2525

3061

server_settings["use_dbus"] = False

2526

3062

tcp_server.use_dbus = False

2527

3063

if zeroconf:

2528

3064

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2529

service = AvahiServiceToSyslog(name =

2530

server_settings["servicename"],

2531

servicetype = "_mandos._tcp",

2532

protocol = protocol, bus = bus)

3065

service = AvahiServiceToSyslog(

3066

name=server_settings["servicename"],

3067

servicetype="_mandos._tcp",

3068

protocol=protocol,

3069

bus=bus)

2533

3070

if server_settings["interface"]:

2534

service.interface = (if_nametoindex

2535

(server_settings["interface"]

2536

.encode("utf-8")))

2537

3071

service.interface = if_nametoindex(

3072

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

3073

2538

3074

global multiprocessing_manager

2539

3075

multiprocessing_manager = multiprocessing.Manager()

2540

3076

2541

3077

client_class = Client

2542

3078

if use_dbus:

2543

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

2544

3079

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

3080

2545

3081

client_settings = Client.config_parser(client_config)

2546

3082

old_client_settings = {}

2547

3083

clients_data = {}

2548

3084

2549

3085

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

2550

3086

global wnull

2551

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

3087

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

2552

3088

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

2553

3089

# mode

2554

3090

if debug or not foreground:

2555

3091

wnull.close()

2556

3092

2557

3093

# Get client data and settings from last running state.

2558

3094

if server_settings["restore"]:

2559

3095

try:

2560

3096

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

2561

clients_data, old_client_settings = (pickle.load

2562

(stored_state))

3097

if sys.version_info.major == 2:

3098

clients_data, old_client_settings = pickle.load(

3099

stored_state)

3100

else:

3101

bytes_clients_data, bytes_old_client_settings = (

3102

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

3103

# Fix bytes to strings

3104

# clients_data

3105

# .keys()

3106

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

3107

if isinstance(key, bytes)

3108

else key): value

3109

for key, value in

3110

bytes_clients_data.items()}

3111

del bytes_clients_data

3112

for key in clients_data:

3113

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

3114

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

3115

for k, v in

3116

clients_data[key].items()}

3117

clients_data[key] = value

3118

# .client_structure

3119

value["client_structure"] = [

3120

(s.decode("utf-8")

3121

if isinstance(s, bytes)

3122

else s) for s in

3123

value["client_structure"]]

3124

# .name & .host

3125

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

3126

if isinstance(value[k], bytes):

3127

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

3128

# old_client_settings

3129

# .keys()

3130

old_client_settings = {

3131

(key.decode("utf-8")

3132

if isinstance(key, bytes)

3133

else key): value

3134

for key, value in

3135

bytes_old_client_settings.items()}

3136

del bytes_old_client_settings

3137

# .host

3138

for value in old_client_settings.values():

3139

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

3140

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

3141

.decode("utf-8"))

2563

3142

os.remove(stored_state_path)

2564

3143

except IOError as e:

2565

3144

if e.errno == errno.ENOENT:

2566

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

2567

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

3145

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

3146

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

2568

3147

else:

2569

3148

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

2570

3149

exc_info=e)

2571

3150

raise

2572

3151

except EOFError as e:

2573

3152

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

2574

"EOFError:", exc_info=e)

2575

3153

"EOFError:",

3154

exc_info=e)

3155

2576

3156

with PGPEngine() as pgp:

2577

3157

for client_name, client in clients_data.items():

2578

3158

# Skip removed clients

2579

3159

if client_name not in client_settings:

2580

3160

continue

2581

3161

2582

3162

# Decide which value to use after restoring saved state.

2583

3163

# We have three different values: Old config file,

2584

3164

# new config file, and saved state.

2589

3169

# For each value in new config, check if it

2590

3170

# differs from the old config value (Except for

2591

3171

# the "secret" attribute)

2592

if (name != "secret" and

2593

value != old_client_settings[client_name]

2594

[name]):

3172

if (name != "secret"

3173

and (value !=

3174

old_client_settings[client_name][name])):

2595

3175

client[name] = value

2596

3176

except KeyError:

2597

3177

pass

2598

3178

2599

3179

# Clients who has passed its expire date can still be

2600

# enabled if its last checker was successful. Clients

3180

# enabled if its last checker was successful. A Client

2601

3181

# whose checker succeeded before we stored its state is

2602

3182

# assumed to have successfully run all checkers during

2603

3183

# downtime.

2606

3186

if not client["last_checked_ok"]:

2607

3187

logger.warning(

2608

3188

"disabling client {} - Client never "

2609

"performed a successful checker"

2610

.format(client_name))

3189

"performed a successful checker".format(

3190

client_name))

2611

3191

client["enabled"] = False

2612

3192

elif client["last_checker_status"] != 0:

2613

3193

logger.warning(

2614

3194

"disabling client {} - Client last"

2615

" checker failed with error code {}"

2616

.format(client_name,

2617

client["last_checker_status"]))

3195

" checker failed with error code"

3196

" {}".format(

3197

client_name,

3198

client["last_checker_status"]))

2618

3199

client["enabled"] = False

2619

3200

else:

2620

client["expires"] = (datetime.datetime

2621

.utcnow()

2622

+ client["timeout"])

3201

client["expires"] = (

3202

datetime.datetime.utcnow()

3203

+ client["timeout"])

2623

3204

logger.debug("Last checker succeeded,"

2624

" keeping {} enabled"

2625

.format(client_name))

3205

" keeping {} enabled".format(

3206

client_name))

2626

3207

try:

2627

client["secret"] = (

2628

pgp.decrypt(client["encrypted_secret"],

2629

client_settings[client_name]

2630

["secret"]))

3208

client["secret"] = pgp.decrypt(

3209

client["encrypted_secret"],

3210

client_settings[client_name]["secret"])

2631

3211

except PGPError:

2632

3212

# If decryption fails, we use secret from new settings

2633

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

2634

.format(client_name))

2635

client["secret"] = (

2636

client_settings[client_name]["secret"])

2637

3213

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

3214

client_name))

3215

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

3216

["secret"])

3217

2638

3218

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

2639

3219

for client_name in (set(old_client_settings)

2640

3220

- set(client_settings)):

2642

3222

for client_name in (set(client_settings)

2643

3223

- set(old_client_settings)):

2644

3224

clients_data[client_name] = client_settings[client_name]

2645

3225

2646

3226

# Create all client objects

2647

3227

for client_name, client in clients_data.items():

2648

3228

tcp_server.clients[client_name] = client_class(

2649

name = client_name, settings = client,

2650

server_settings = server_settings)

2651

3229

name=client_name,

3230

settings=client,

3231

server_settings=server_settings)

3232

2652

3233

if not tcp_server.clients:

2653

3234

logger.warning("No clients defined")

2654

3235

2655

3236

if not foreground:

2656

3237

if pidfile is not None:

3238

pid = os.getpid()

2657

3239

try:

2658

3240

with pidfile:

2659

pid = os.getpid()

2660

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

3241

print(pid, file=pidfile)

2661

3242

except IOError:

2662

3243

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

2663

3244

pidfilename, pid)

2664

3245

del pidfile

2665

3246

del pidfilename

2666

2667

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

2668

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

2669

3247

3248

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

3249

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3250

lambda: main_loop.quit() and False)

3251

2670

3252

if use_dbus:

2671

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

2672

"se.bsnet.fukt.Mandos"})

2673

class MandosDBusService(DBusObjectWithProperties):

3253

3254

@alternate_dbus_interfaces(

3255

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

3256

class MandosDBusService(DBusObjectWithObjectManager):

2674

3257

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

3258

2675

3259

def __init__(self):

2676

3260

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

3261

2677

3262

_interface = "se.recompile.Mandos"

2678

2679

@dbus_interface_annotations(_interface)

2680

def _foo(self):

2681

return { "org.freedesktop.DBus.Property"

2682

".EmitsChangedSignal":

2683

"false"}

2684

3263

2685

3264

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

2686

3265

def ClientAdded(self, objpath):

2687

3266

"D-Bus signal"

2688

3267

pass

2689

3268

2690

3269

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

2691

3270

def ClientNotFound(self, fingerprint, address):

2692

3271

"D-Bus signal"

2693

3272

pass

2694

3273

3274

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

3275

"true"})

2695

3276

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

2696

3277

def ClientRemoved(self, objpath, name):

2697

3278

"D-Bus signal"

2698

3279

pass

2699

3280

3281

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

3282

"true"})

2700

3283

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

2701

3284

def GetAllClients(self):

2702

3285

"D-Bus method"

2703

return dbus.Array(c.dbus_object_path

2704

for c in

2705

tcp_server.clients.itervalues())

2706

3286

return dbus.Array(c.dbus_object_path for c in

3287

tcp_server.clients.values())

3288

3289

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

3290

"true"})

2707

3291

@dbus.service.method(_interface,

2708

3292

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

2709

3293

def GetAllClientsWithProperties(self):

2710

3294

"D-Bus method"

2711

3295

return dbus.Dictionary(

2712

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

2713

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

3296

{c.dbus_object_path: c.GetAll(

3297

"se.recompile.Mandos.Client")

3298

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

2714

3299

signature="oa{sv}")

2715

3300

2716

3301

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

2717

3302

def RemoveClient(self, object_path):

2718

3303

"D-Bus method"

2719

for c in tcp_server.clients.itervalues():

3304

for c in tcp_server.clients.values():

2720

3305

if c.dbus_object_path == object_path:

2721

3306

del tcp_server.clients[c.name]

2722

3307

c.remove_from_connection()

2723

# Don't signal anything except ClientRemoved

3308

# Don't signal the disabling

2724

3309

c.disable(quiet=True)

2725

# Emit D-Bus signal

2726

self.ClientRemoved(object_path, c.name)

3310

# Emit D-Bus signal for removal

3311

self.client_removed_signal(c)

2727

3312

return

2728

3313

raise KeyError(object_path)

2729

3314

2730

3315

del _interface

2731

3316

3317

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3318

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

3319

def GetManagedObjects(self):

3320

"""D-Bus method"""

3321

return dbus.Dictionary(

3322

{client.dbus_object_path:

3323

dbus.Dictionary(

3324

{interface: client.GetAll(interface)

3325

for interface in

3326

client._get_all_interface_names()})

3327

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

3328

3329

def client_added_signal(self, client):

3330

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

3331

if use_dbus:

3332

# New standard signal

3333

self.InterfacesAdded(

3334

client.dbus_object_path,

3335

dbus.Dictionary(

3336

{interface: client.GetAll(interface)

3337

for interface in

3338

client._get_all_interface_names()}))

3339

# Old signal

3340

self.ClientAdded(client.dbus_object_path)

3341

3342

def client_removed_signal(self, client):

3343

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

3344

if use_dbus:

3345

# New standard signal

3346

self.InterfacesRemoved(

3347

client.dbus_object_path,

3348

client._get_all_interface_names())

3349

# Old signal

3350

self.ClientRemoved(client.dbus_object_path,

3351

client.name)

3352

2732

3353

mandos_dbus_service = MandosDBusService()

2733

3354

3355

# Save modules to variables to exempt the modules from being

3356

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

3357

mp = multiprocessing

3358

wn = wnull

3359

2734

3360

def cleanup():

2735

3361

"Cleanup function; run on exit"

2736

3362

if zeroconf:

2737

3363

service.cleanup()

2738

2739

multiprocessing.active_children()

2740

wnull.close()

3364

3365

mp.active_children()

3366

wn.close()

2741

3367

if not (tcp_server.clients or client_settings):

2742

3368

return

2743

3369

2744

3370

# Store client before exiting. Secrets are encrypted with key

2745

3371

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

2746

3372

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

2747

3373

clients = {}

2748

3374

with PGPEngine() as pgp:

2749

for client in tcp_server.clients.itervalues():

3375

for client in tcp_server.clients.values():

2750

3376

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

2751

3377

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

2752

3378

key)

2753

3379

client_dict = {}

2754

3380

2755

3381

# A list of attributes that can not be pickled

2756

3382

# + secret.

2757

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

2758

"checker", "server_settings" }

2759

for name, typ in (inspect.getmembers

2760

(dbus.service.Object)):

3383

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

3384

"checker", "server_settings"}

3385

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

3386

.Object):

2761

3387

exclude.add(name)

2762

3388

2763

3389

client_dict["encrypted_secret"] = (client

2764

3390

.encrypted_secret)

2765

3391

for attr in client.client_structure:

2766

3392

if attr not in exclude:

2767

3393

client_dict[attr] = getattr(client, attr)

2768

3394

2769

3395

clients[client.name] = client_dict

2770

3396

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

2771

3397

2772

3398

try:

2773

with (tempfile.NamedTemporaryFile

2774

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

2775

dir=os.path.dirname(stored_state_path),

2776

delete=False)) as stored_state:

2777

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

2778

tempname=stored_state.name

3399

with tempfile.NamedTemporaryFile(

3400

mode='wb',

3401

suffix=".pickle",

3402

prefix='clients-',

3403

dir=os.path.dirname(stored_state_path),

3404

delete=False) as stored_state:

3405

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

3406

protocol=2)

3407

tempname = stored_state.name

2779

3408

os.rename(tempname, stored_state_path)

2780

3409

except (IOError, OSError) as e:

2781

3410

if not debug:

2790

3419

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

2791

3420

exc_info=e)

2792

3421

raise

2793

3422

2794

3423

# Delete all clients, and settings from config

2795

3424

while tcp_server.clients:

2796

3425

name, client = tcp_server.clients.popitem()

2797

3426

if use_dbus:

2798

3427

client.remove_from_connection()

2799

# Don't signal anything except ClientRemoved

3428

# Don't signal the disabling

2800

3429

client.disable(quiet=True)

3430

# Emit D-Bus signal for removal

2801

3431

if use_dbus:

2802

# Emit D-Bus signal

2803

mandos_dbus_service.ClientRemoved(client

2804

.dbus_object_path,

2805

client.name)

3432

mandos_dbus_service.client_removed_signal(client)

2806

3433

client_settings.clear()

2807

3434

2808

3435

atexit.register(cleanup)

2809

2810

for client in tcp_server.clients.itervalues():

3436

3437

for client in tcp_server.clients.values():

2811

3438

if use_dbus:

2812

# Emit D-Bus signal

2813

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3439

# Emit D-Bus signal for adding

3440

mandos_dbus_service.client_added_signal(client)

2814

3441

# Need to initiate checking of clients

2815

3442

if client.enabled:

2816

3443

client.init_checker()

2817

3444

2818

3445

tcp_server.enable()

2819

3446

tcp_server.server_activate()

2820

3447

2821

3448

# Find out what port we got

2822

3449

if zeroconf:

2823

3450

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

2828

3455

else: # IPv4

2829

3456

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

2830

3457

*tcp_server.socket.getsockname())

2831

2832

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

2833

3458

3459

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

3460

2834

3461

try:

2835

3462

if zeroconf:

2836

3463

# From the Avahi example code

2841

3468

cleanup()

2842

3469

sys.exit(1)

2843

3470

# End of Avahi example code

2844

2845

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

2846

lambda *args, **kwargs:

2847

(tcp_server.handle_request

2848

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

2849

3471

3472

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

3473

lambda *args, **kwargs:

3474

(tcp_server.handle_request

3475

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

3476

2850

3477

logger.debug("Starting main loop")

2851

3478

main_loop.run()

2852

3479

except AvahiError as error:

2861

3488

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

2862

3489

cleanup()

2863

3490

3491

2864

3492

if __name__ == '__main__':

2865

3493

main()