/mandos/trunk : revision 654

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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 file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.15"

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SO_BINDTODEVICE = None

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version = "1.6.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown=False):

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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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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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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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)

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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303

304

221

class AvahiError(Exception):

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

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self.value = value

307

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

308

**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

345

TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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261

self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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366

def rename(self, remove=True):

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def rename(self):

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

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277

if self.rename_count >= self.max_renames:

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278

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

370

279

" after %i retries, exiting.",

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280

self.rename_count)

372

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raise AvahiServiceError("Too many renames")

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

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

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285

self.name)

378

if remove:

379

self.remove()

286

self.remove()

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try:

381

288

self.add()

382

289

except dbus.exceptions.DBusException as error:

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

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

392

295

def remove(self):

393

296

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

394

297

if self.entry_group_state_changed_match is not None:

396

299

self.entry_group_state_changed_match = None

397

300

if self.group is not None:

398

301

self.group.Reset()

399

302

400

303

def add(self):

401

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

402

305

self.remove()

419

322

dbus.UInt16(self.port),

420

323

avahi.string_array_to_txt_array(self.TXT))

421

324

self.group.Commit()

422

325

423

326

def entry_group_state_changed(self, state, error):

424

327

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

425

328

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

426

329

427

330

if state == avahi.ENTRY_GROUP_ESTABLISHED:

428

331

logger.debug("Zeroconf service established.")

429

332

elif state == avahi.ENTRY_GROUP_COLLISION:

431

334

self.rename()

432

335

elif state == avahi.ENTRY_GROUP_FAILURE:

433

336

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

434

str(error))

435

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

436

337

unicode(error))

338

raise AvahiGroupError("State changed: {0!s}"

339

.format(error))

340

437

341

def cleanup(self):

438

342

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

439

343

if self.group is not None:

444

348

pass

445

349

self.group = None

446

350

self.remove()

447

351

448

352

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

449

353

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

450

354

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

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

457

362

if state in bad_states:

458

363

if bad_states[state] is not None:

459

364

if error is None:

462

367

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

463

368

self.cleanup()

464

369

elif state == avahi.SERVER_RUNNING:

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

370

self.add()

477

371

else:

478

372

if error is None:

479

373

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

480

374

else:

481

375

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

482

376

483

377

def activate(self):

484

378

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

485

379

if self.server is None:

489

383

follow_name_owner_changes=True),

490

384

avahi.DBUS_INTERFACE_SERVER)

491

385

self.server.connect_to_signal("StateChanged",

492

self.server_state_changed)

386

self.server_state_changed)

493

387

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

494

388

495

389

496

390

class AvahiServiceToSyslog(AvahiService):

497

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

391

def rename(self):

498

392

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

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

('Mandos ({0}) [%(process)d]:'

396

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

397

.format(self.name)))

503

398

return ret

504

399

505

400

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()

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

778

406

779

407

780

408

class Client(object):

781

409

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

782

410

783

411

Attributes:

784

412

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

785

413

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

787

415

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

788

416

to see if the client lives.

789

417

'None' if no process is running.

790

checker_callback_tag: a GLib event source tag, or None

418

checker_callback_tag: a gobject event source tag, or None

791

419

checker_command: string; External command which is run to check

792

420

if client lives. %() expansions are done at

793

421

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

794

422

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

795

checker_initiator_tag: a GLib event source tag, or None

423

checker_initiator_tag: a gobject event source tag, or None

796

424

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

797

425

client_structure: Object describing what attributes a client has

798

426

and is used for storing the client at exit

799

427

current_checker_command: string; current running checker_command

800

disable_initiator_tag: a GLib event source tag, or None

428

disable_initiator_tag: a gobject event source tag, or None

801

429

enabled: bool()

802

430

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

803

431

uniquely identify the client

808

436

last_checker_status: integer between 0 and 255 reflecting exit

809

437

status of last checker. -1 reflects crashed

810

438

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

813

439

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

814

440

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

815

441

D-Bus identifiers

822

448

disabled, or None

823

449

server_settings: The server_settings dict from main()

824

450

"""

825

451

826

452

runtime_expansions = ("approval_delay", "approval_duration",

827

453

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

828

454

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

829

455

"last_approval_request", "last_checked_ok",

830

456

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

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

843

483

@staticmethod

844

484

def config_parser(config):

845

485

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

852

492

for client_name in config.sections():

853

493

section = dict(config.items(client_name))

854

494

client = settings[client_name] = {}

855

495

856

496

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

857

497

# Reformat values from string types to Python types

858

498

client["approved_by_default"] = config.getboolean(

859

499

client_name, "approved_by_default")

860

500

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

861

501

"enabled")

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

502

866

503

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

867

504

.replace(" ", ""))

868

505

if "secret" in section:

869

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

870

.encode("utf-8"),

871

"base64")

506

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

872

507

elif "secfile" in section:

873

508

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

874

509

(section["secfile"])),

875

510

"rb") as secfile:

876

511

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

877

512

else:

878

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

513

raise TypeError("No secret or secfile for section {0}"

879

514

.format(section))

880

515

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

881

516

client["extended_timeout"] = string_to_delta(

889

524

client["last_approval_request"] = None

890

525

client["last_checked_ok"] = None

891

526

client["last_checker_status"] = -2

892

527

893

528

return settings

894

895

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

529

530

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

896

531

self.name = name

897

532

if server_settings is None:

898

533

server_settings = {}

899

534

self.server_settings = server_settings

900

535

# adding all client settings

901

for setting, value in settings.items():

536

for setting, value in settings.iteritems():

902

537

setattr(self, setting, value)

903

538

904

539

if self.enabled:

905

540

if not hasattr(self, "last_enabled"):

906

541

self.last_enabled = datetime.datetime.utcnow()

910

545

else:

911

546

self.last_enabled = None

912

547

self.expires = None

913

548

914

549

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

915

553

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

916

554

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

917

555

datetime.datetime.utcnow())

918

556

919

557

# attributes specific for this server instance

920

558

self.checker = None

921

559

self.checker_initiator_tag = None

924

562

self.current_checker_command = None

925

563

self.approved = None

926

564

self.approvals_pending = 0

927

self.changedstate = multiprocessing_manager.Condition(

928

multiprocessing_manager.Lock())

929

self.client_structure = [attr

930

for attr in self.__dict__.keys()

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

931

570

if not attr.startswith("_")]

932

571

self.client_structure.append("client_structure")

933

934

for name, t in inspect.getmembers(

935

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

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

936

577

if not name.startswith("_"):

937

578

self.client_structure.append(name)

938

579

939

580

# Send notice to process children that client state has changed

940

581

def send_changedstate(self):

941

582

with self.changedstate:

942

583

self.changedstate.notify_all()

943

584

944

585

def enable(self):

945

586

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

946

587

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

951

592

self.last_enabled = datetime.datetime.utcnow()

952

593

self.init_checker()

953

594

self.send_changedstate()

954

595

955

596

def disable(self, quiet=True):

956

597

"""Disable this client."""

957

598

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

959

600

if not quiet:

960

601

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

961

602

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

962

GLib.source_remove(self.disable_initiator_tag)

603

gobject.source_remove(self.disable_initiator_tag)

963

604

self.disable_initiator_tag = None

964

605

self.expires = None

965

606

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

966

GLib.source_remove(self.checker_initiator_tag)

607

gobject.source_remove(self.checker_initiator_tag)

967

608

self.checker_initiator_tag = None

968

609

self.stop_checker()

969

610

self.enabled = False

970

611

if not quiet:

971

612

self.send_changedstate()

972

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

613

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

973

614

return False

974

615

975

616

def __del__(self):

976

617

self.disable()

977

618

978

619

def init_checker(self):

979

620

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

980

621

# and every interval from then on.

981

622

if self.checker_initiator_tag is not None:

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)

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

986

627

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

987

628

if self.disable_initiator_tag is not None:

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)

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

991

633

# Also start a new checker *right now*.

992

634

self.start_checker()

993

994

def checker_callback(self, source, condition, connection,

995

command):

635

636

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

996

637

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

997

638

self.checker_callback_tag = None

998

639

self.checker = None

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

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1006

642

if self.last_checker_status == 0:

1007

643

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

1008

644

vars(self))

1009

645

self.checked_ok()

1010

646

else:

1011

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

647

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

648

vars(self))

1012

649

else:

1013

650

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

1015

651

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

1016

652

vars(self))

1017

return False

1018

653

1019

654

def checked_ok(self):

1020

655

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

1021

656

self.last_checked_ok = datetime.datetime.utcnow()

1022

657

self.last_checker_status = 0

1023

self.last_checker_signal = None

1024

658

self.bump_timeout()

1025

659

1026

660

def bump_timeout(self, timeout=None):

1027

661

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

1028

662

if timeout is None:

1029

663

timeout = self.timeout

1030

664

if self.disable_initiator_tag is not None:

1031

GLib.source_remove(self.disable_initiator_tag)

665

gobject.source_remove(self.disable_initiator_tag)

1032

666

self.disable_initiator_tag = None

1033

667

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

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1036

671

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

1037

672

1038

673

def need_approval(self):

1039

674

self.last_approval_request = datetime.datetime.utcnow()

1040

675

1041

676

def start_checker(self):

1042

677

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

1043

678

1044

679

If a checker already exists, leave it running and do

1045

680

nothing."""

1046

681

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

1051

686

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

1052

687

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

1053

688

# should be.

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

689

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

1059

704

# Start a new checker if needed

1060

705

if self.checker is None:

1061

706

# Escape attributes for the shell

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1065

711

try:

1066

712

command = self.checker_command % escaped_attrs

1067

713

except TypeError as error:

1068

714

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

1069

self.checker_command,

715

self.checker_command, exc_info=error)

716

return True # Try again later

717

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

1070

739

exc_info=error)

1071

return True # Try again later

1072

self.current_checker_command = command

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

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

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

1099

760

return True

1100

761

1101

762

def stop_checker(self):

1102

763

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

1103

764

if self.checker_callback_tag:

1104

GLib.source_remove(self.checker_callback_tag)

765

gobject.source_remove(self.checker_callback_tag)

1105

766

self.checker_callback_tag = None

1106

767

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

1107

768

return

1108

769

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

1109

self.checker.terminate()

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1110

778

self.checker = None

1111

779

1112

780

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1117

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1118

784

become properties on the D-Bus.

1119

785

1120

786

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

1121

787

and with one argument by "Set".

1122

788

1123

789

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

1124

790

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

1125

791

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

1128

794

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

1129

795

if byte_arrays and signature != "ay":

1130

796

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

1131

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

1132

797

" signature {0!r}".format(signature))

1133

798

def decorator(func):

1134

799

func._dbus_is_property = True

1135

800

func._dbus_interface = dbus_interface

1138

803

func._dbus_name = func.__name__

1139

804

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

1140

805

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

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1142

807

return func

1143

1144

808

return decorator

1145

809

1146

810

1147

811

def dbus_interface_annotations(dbus_interface):

1148

812

"""Decorator for marking functions returning interface annotations

1149

813

1150

814

Usage:

1151

815

1152

816

@dbus_interface_annotations("org.example.Interface")

1153

817

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

1154

818

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

1155

819

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

1156

820

"false"}

1157

821

"""

1158

1159

822

def decorator(func):

1160

823

func._dbus_is_interface = True

1161

824

func._dbus_interface = dbus_interface

1162

825

func._dbus_name = dbus_interface

1163

826

return func

1164

1165

827

return decorator

1166

828

1167

829

1168

830

def dbus_annotations(annotations):

1169

831

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

1170

832

Usage:

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

833

1175

834

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

1176

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

1177

839

def Property_dbus_property(self):

1178

840

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

1181

841

"""

1182

1183

842

def decorator(func):

1184

843

func._dbus_annotations = annotations

1185

844

return func

1186

1187

845

return decorator

1188

846

1189

847

1190

848

class DBusPropertyException(dbus.exceptions.DBusException):

1191

849

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

1192

850

"""

1193

pass

851

def __unicode__(self):

852

return unicode(str(self))

1194

853

1195

854

1196

855

class DBusPropertyAccessException(DBusPropertyException):

1205

864

pass

1206

865

1207

866

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.

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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

1213

873

"""

1214

874

1215

875

@staticmethod

1216

876

def _is_dbus_thing(thing):

1217

877

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

1218

878

1219

879

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

1220

880

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

1221

881

"""

1222

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

882

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

1223

883

False)

1224

884

1225

885

def _get_all_dbus_things(self, thing):

1226

886

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

1227

887

"""

1228

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

888

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

889

name),

1229

890

athing.__get__(self))

1230

891

for cls in self.__class__.__mro__

1231

892

for name, athing in

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

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

1305

896

def _get_dbus_property(self, interface_name, property_name):

1306

897

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

1307

898

property with the specified name and interface.

1308

899

"""

1309

for cls in self.__class__.__mro__:

1310

for name, value in inspect.getmembers(

1311

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

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

1312

904

if (value._dbus_name == property_name

1313

905

and value._dbus_interface == interface_name):

1314

906

return value.__get__(self)

1315

907

1316

908

# No such property

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",

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

1331

914

out_signature="v")

1332

915

def Get(self, interface_name, property_name):

1333

916

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

1339

922

if not hasattr(value, "variant_level"):

1340

923

return value

1341

924

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

1342

925

1343

926

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

1344

927

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

1345

928

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

1352

935

# signatures other than "ay".

1353

936

if prop._dbus_signature != "ay":

1354

937

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

1355

"'ay' signature {!r}"

938

"'ay' signature {0!r}"

1356

939

.format(prop._dbus_signature))

1357

940

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

1358

941

for byte in value))

1359

942

prop(value)

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

943

944

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

1363

945

out_signature="a{sv}")

1364

946

def GetAll(self, interface_name):

1365

947

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

1366

948

standard.

1367

949

1368

950

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

1369

951

"""

1370

952

properties = {}

1380

962

if not hasattr(value, "variant_level"):

1381

963

properties[name] = value

1382

964

continue

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

965

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

966

value.variant_level+1)

1385

967

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

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

968

1395

969

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1396

970

out_signature="s",

1397

971

path_keyword='object_path',

1398

972

connection_keyword='connection')

1399

973

def Introspect(self, object_path, connection):

1400

974

"""Overloading of standard D-Bus method.

1401

975

1402

976

Inserts property tags and interface annotation tags.

1403

977

"""

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

978

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

979

connection)

1407

980

try:

1408

981

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

1409

1410

982

def make_tag(document, name, prop):

1411

983

e = document.createElement("property")

1412

984

e.setAttribute("name", name)

1413

985

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

1414

986

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

1415

987

return e

1416

1417

988

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

1418

989

# Add property tags

1419

990

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

1422

993

if prop._dbus_interface

1423

994

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

1424

995

if_tag.appendChild(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)

996

# Add annotation tags

997

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

998

for tag in if_tag.getElementsByTagName(typ):

999

annots = dict()

1000

for name, prop in (self.

1001

_get_all_dbus_things(typ)):

1002

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

1003

and prop._dbus_interface

1004

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

1005

annots.update(getattr

1006

(prop,

1007

"_dbus_annotations",

1008

{}))

1009

for name, value in annots.iteritems():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().iteritems()

1019

for name, annotations in

1020

self._get_all_dbus_things("interface")

1021

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

1022

)).iteritems():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

1441

1027

# Add the names to the return values for the

1442

1028

# "org.freedesktop.DBus.Properties" methods

1443

1029

if (if_tag.getAttribute("name")

1462

1048

return xmlstring

1463

1049

1464

1050

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

1536

1051

def datetime_to_dbus(dt, variant_level=0):

1537

1052

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

1538

1053

if dt is None:

1539

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

1540

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

1054

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

1055

return dbus.String(dt.isoformat(),

1056

variant_level=variant_level)

1541

1057

1542

1058

1543

1059

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1545

1061

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

1546

1062

interface names according to the "alt_interface_names" mapping.

1547

1063

Usage:

1548

1064

1549

1065

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

1550

1066

"net.example.AlternateInterface"})

1551

1067

class SampleDBusObject(dbus.service.Object):

1552

1068

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

1553

1069

def SampleDBusMethod():

1554

1070

pass

1555

1071

1556

1072

The above "SampleDBusMethod" on "SampleDBusObject" will be

1557

1073

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

1558

1074

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

1559

1075

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

1560

1076

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

1561

1077

1562

1078

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

1563

1079

(from DBusObjectWithProperties) and interfaces (from the

1564

1080

dbus_interface_annotations decorator).

1565

1081

"""

1566

1567

1082

def wrapper(cls):

1568

1083

for orig_interface_name, alt_interface_name in (

1569

alt_interface_names.items()):

1084

alt_interface_names.iteritems()):

1570

1085

attr = {}

1571

1086

interface_names = set()

1572

1087

# Go though all attributes of the class

1574

1089

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

1575

1090

# with the wrong interface name

1576

1091

if (not hasattr(attribute, "_dbus_interface")

1577

or not attribute._dbus_interface.startswith(

1578

orig_interface_name)):

1092

or not attribute._dbus_interface

1093

.startswith(orig_interface_name)):

1579

1094

continue

1580

1095

# Create an alternate D-Bus interface name based on

1581

1096

# the current name

1582

alt_interface = attribute._dbus_interface.replace(

1583

orig_interface_name, alt_interface_name)

1097

alt_interface = (attribute._dbus_interface

1098

.replace(orig_interface_name,

1099

alt_interface_name))

1584

1100

interface_names.add(alt_interface)

1585

1101

# Is this a D-Bus signal?

1586

1102

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

1587

1103

# Extract the original non-method undecorated

1588

1104

# function by black magic

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

1105

nonmethod_func = (dict(

1591

1106

zip(attribute.func_code.co_freevars,

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)

1107

attribute.__closure__))["func"]

1108

.cell_contents)

1599

1109

# Create a new, but exactly alike, function

1600

1110

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

1601

1111

# with the alternate D-Bus interface name

1602

new_function = copy_function(nonmethod_func)

1603

new_function = (dbus.service.signal(

1604

alt_interface,

1605

attribute._dbus_signature)(new_function))

1112

new_function = (dbus.service.signal

1113

(alt_interface,

1114

attribute._dbus_signature)

1115

(types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)))

1606

1121

# Copy annotations, if any

1607

1122

try:

1608

new_function._dbus_annotations = dict(

1609

attribute._dbus_annotations)

1123

new_function._dbus_annotations = (

1124

dict(attribute._dbus_annotations))

1610

1125

except AttributeError:

1611

1126

pass

1612

1613

1127

# Define a creator of a function to call both the

1614

1128

# original and alternate functions, so both the

1615

1129

# original and alternate signals gets sent when

1618

1132

"""This function is a scope container to pass

1619

1133

func1 and func2 to the "call_both" function

1620

1134

outside of its arguments"""

1621

1622

@functools.wraps(func2)

1623

1135

def call_both(*args, **kwargs):

1624

1136

"""This function will emit two D-Bus

1625

1137

signals by calling func1 and func2"""

1626

1138

func1(*args, **kwargs)

1627

1139

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

1634

1140

return call_both

1635

1141

# Create the "call_both" function and add it to

1636

1142

# the class

1641

1147

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

1642

1148

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

1643

1149

# to the class.

1644

attr[attrname] = (

1645

dbus.service.method(

1646

alt_interface,

1647

attribute._dbus_in_signature,

1648

attribute._dbus_out_signature)

1649

(copy_function(attribute)))

1150

attr[attrname] = (dbus.service.method

1151

(alt_interface,

1152

attribute._dbus_in_signature,

1153

attribute._dbus_out_signature)

1154

(types.FunctionType

1155

(attribute.func_code,

1156

attribute.func_globals,

1157

attribute.func_name,

1158

attribute.func_defaults,

1159

attribute.func_closure)))

1650

1160

# Copy annotations, if any

1651

1161

try:

1652

attr[attrname]._dbus_annotations = dict(

1653

attribute._dbus_annotations)

1162

attr[attrname]._dbus_annotations = (

1163

dict(attribute._dbus_annotations))

1654

1164

except AttributeError:

1655

1165

pass

1656

1166

# Is this a D-Bus property?

1659

1169

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

1660

1170

# property with the alternate D-Bus interface

1661

1171

# name. Add it to the class.

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)))

1172

attr[attrname] = (dbus_service_property

1173

(alt_interface,

1174

attribute._dbus_signature,

1175

attribute._dbus_access,

1176

attribute

1177

._dbus_get_args_options

1178

["byte_arrays"])

1179

(types.FunctionType

1180

(attribute.func_code,

1181

attribute.func_globals,

1182

attribute.func_name,

1183

attribute.func_defaults,

1184

attribute.func_closure)))

1668

1185

# Copy annotations, if any

1669

1186

try:

1670

attr[attrname]._dbus_annotations = dict(

1671

attribute._dbus_annotations)

1187

attr[attrname]._dbus_annotations = (

1188

dict(attribute._dbus_annotations))

1672

1189

except AttributeError:

1673

1190

pass

1674

1191

# Is this a D-Bus interface?

1677

1194

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

1678

1195

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

1679

1196

# to the class.

1680

attr[attrname] = (

1681

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1197

attr[attrname] = (dbus_interface_annotations

1198

(alt_interface)

1199

(types.FunctionType

1200

(attribute.func_code,

1201

attribute.func_globals,

1202

attribute.func_name,

1203

attribute.func_defaults,

1204

attribute.func_closure)))

1683

1205

if deprecate:

1684

1206

# Deprecate all alternate interfaces

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1207

iname="_AlternateDBusNames_interface_annotation{0}"

1686

1208

for interface_name in interface_names:

1687

1688

1209

@dbus_interface_annotations(interface_name)

1689

1210

def func(self):

1690

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

1691

"true"}

1211

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

1212

"true" }

1692

1213

# Find an unused name

1693

1214

for aname in (iname.format(i)

1694

1215

for i in itertools.count()):

1698

1219

if interface_names:

1699

1220

# Replace the class with a new subclass of it with

1700

1221

# methods, signals, etc. as created above.

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)

1222

cls = type(b"{0}Alternate".format(cls.__name__),

1223

(cls,), attr)

1707

1224

return cls

1708

1709

1225

return wrapper

1710

1226

1711

1227

1712

1228

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

1713

"se.bsnet.fukt.Mandos"})

1229

"se.bsnet.fukt.Mandos"})

1714

1230

class ClientDBus(Client, DBusObjectWithProperties):

1715

1231

"""A Client class using D-Bus

1716

1232

1717

1233

Attributes:

1718

1234

dbus_object_path: dbus.ObjectPath

1719

1235

bus: dbus.SystemBus()

1720

1236

"""

1721

1237

1722

1238

runtime_expansions = (Client.runtime_expansions

1723

+ ("dbus_object_path", ))

1724

1725

_interface = "se.recompile.Mandos.Client"

1726

1239

+ ("dbus_object_path",))

1240

1727

1241

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

1728

1729

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

1242

1243

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

1730

1244

self.bus = bus

1731

1245

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

1732

1246

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

1733

1247

# the D-Bus

1734

client_object_name = str(self.name).translate(

1248

client_object_name = unicode(self.name).translate(

1735

1249

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

1736

1250

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

1737

self.dbus_object_path = dbus.ObjectPath(

1738

"/clients/" + client_object_name)

1251

self.dbus_object_path = (dbus.ObjectPath

1252

("/clients/" + client_object_name))

1739

1253

DBusObjectWithProperties.__init__(self, self.bus,

1740

1254

self.dbus_object_path)

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):

1255

1256

def notifychangeproperty(transform_func,

1257

dbus_name, type_func=lambda x: x,

1258

variant_level=1):

1747

1259

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

1748

1260

its changes to DBus.

1749

1261

1750

1262

transform_fun: Function that takes a value and a variant_level

1751

1263

and transforms it to a D-Bus type.

1752

1264

dbus_name: D-Bus name of the variable

1754

1266

to the D-Bus. Default: no transform

1755

1267

variant_level: D-Bus variant level. Default: 1

1756

1268

"""

1757

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

1758

1269

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

1759

1270

def setter(self, value):

1760

1271

if hasattr(self, "dbus_object_path"):

1761

1272

if (not hasattr(self, attrname) or

1762

1273

type_func(getattr(self, attrname, None))

1763

1274

!= type_func(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())

1275

dbus_value = transform_func(type_func(value),

1276

variant_level

1277

=variant_level)

1278

self.PropertyChanged(dbus.String(dbus_name),

1279

dbus_value)

1779

1280

setattr(self, attrname, value)

1780

1281

1781

1282

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

1782

1283

1783

1284

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1784

1285

approvals_pending = notifychangeproperty(dbus.Boolean,

1785

1286

"ApprovalPending",

1786

type_func=bool)

1287

type_func = bool)

1787

1288

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

1788

1289

last_enabled = notifychangeproperty(datetime_to_dbus,

1789

1290

"LastEnabled")

1790

checker = notifychangeproperty(

1791

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1291

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

1292

type_func = lambda checker:

1293

checker is not None)

1793

1294

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1794

1295

"LastCheckedOK")

1795

1296

last_checker_status = notifychangeproperty(dbus.Int16,

1798

1299

datetime_to_dbus, "LastApprovalRequest")

1799

1300

approved_by_default = notifychangeproperty(dbus.Boolean,

1800

1301

"ApprovedByDefault")

1801

approval_delay = notifychangeproperty(

1802

dbus.UInt64, "ApprovalDelay",

1803

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

1302

approval_delay = notifychangeproperty(dbus.UInt64,

1303

"ApprovalDelay",

1304

type_func =

1305

timedelta_to_milliseconds)

1804

1306

approval_duration = notifychangeproperty(

1805

1307

dbus.UInt64, "ApprovalDuration",

1806

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

1308

type_func = timedelta_to_milliseconds)

1807

1309

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

1808

timeout = notifychangeproperty(

1809

dbus.UInt64, "Timeout",

1810

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

1310

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

1311

type_func =

1312

timedelta_to_milliseconds)

1811

1313

extended_timeout = notifychangeproperty(

1812

1314

dbus.UInt64, "ExtendedTimeout",

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)

1315

type_func = timedelta_to_milliseconds)

1316

interval = notifychangeproperty(dbus.UInt64,

1317

"Interval",

1318

type_func =

1319

timedelta_to_milliseconds)

1817

1320

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

1818

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

1819

invalidate_only=True)

1820

1321

1821

1322

del notifychangeproperty

1822

1323

1823

1324

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

1824

1325

try:

1825

1326

self.remove_from_connection()

1828

1329

if hasattr(DBusObjectWithProperties, "__del__"):

1829

1330

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

1830

1331

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

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:

1332

1333

def checker_callback(self, pid, condition, command,

1334

*args, **kwargs):

1335

self.checker_callback_tag = None

1336

self.checker = None

1337

if os.WIFEXITED(condition):

1338

exitstatus = os.WEXITSTATUS(condition)

1839

1339

# Emit D-Bus signal

1840

1340

self.CheckerCompleted(dbus.Int16(exitstatus),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1341

dbus.Int64(condition),

1843

1342

dbus.String(command))

1844

1343

else:

1845

1344

# Emit D-Bus signal

1846

1345

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

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1346

dbus.Int64(condition),

1851

1347

dbus.String(command))

1852

return ret

1853

1348

1349

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

1350

*args, **kwargs)

1351

1854

1352

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

1855

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

1353

old_checker = self.checker

1354

if self.checker is not None:

1355

old_checker_pid = self.checker.pid

1356

else:

1357

old_checker_pid = None

1856

1358

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

1857

1359

# Only if new checker process was started

1858

1360

if (self.checker is not None

1860

1362

# Emit D-Bus signal

1861

1363

self.CheckerStarted(self.current_checker_command)

1862

1364

return r

1863

1365

1864

1366

def _reset_approved(self):

1865

1367

self.approved = None

1866

1368

return False

1867

1369

1868

1370

def approve(self, value=True):

1869

1371

self.approved = value

1870

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

1871

* 1000), self._reset_approved)

1372

gobject.timeout_add(timedelta_to_milliseconds

1373

(self.approval_duration),

1374

self._reset_approved)

1872

1375

self.send_changedstate()

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1376

1377

## D-Bus methods, signals & properties

1378

_interface = "se.recompile.Mandos.Client"

1379

1380

## Interfaces

1381

1382

@dbus_interface_annotations(_interface)

1383

def _foo(self):

1384

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

1385

"false"}

1386

1387

## Signals

1388

1880

1389

# CheckerCompleted - signal

1881

1390

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

1882

1391

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

1883

1392

"D-Bus signal"

1884

1393

pass

1885

1394

1886

1395

# CheckerStarted - signal

1887

1396

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

1888

1397

def CheckerStarted(self, command):

1889

1398

"D-Bus signal"

1890

1399

pass

1891

1400

1892

1401

# PropertyChanged - signal

1893

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

1894

1402

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

1895

1403

def PropertyChanged(self, property, value):

1896

1404

"D-Bus signal"

1897

1405

pass

1898

1406

1899

1407

# GotSecret - signal

1900

1408

@dbus.service.signal(_interface)

1901

1409

def GotSecret(self):

1904

1412

server to mandos-client

1905

1413

"""

1906

1414

pass

1907

1415

1908

1416

# Rejected - signal

1909

1417

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

1910

1418

def Rejected(self, reason):

1911

1419

"D-Bus signal"

1912

1420

pass

1913

1421

1914

1422

# NeedApproval - signal

1915

1423

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

1916

1424

def NeedApproval(self, timeout, default):

1917

1425

"D-Bus signal"

1918

1426

return self.need_approval()

1919

1920

# Methods

1921

1427

1428

## Methods

1429

1922

1430

# Approve - method

1923

1431

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

1924

1432

def Approve(self, value):

1925

1433

self.approve(value)

1926

1434

1927

1435

# CheckedOK - method

1928

1436

@dbus.service.method(_interface)

1929

1437

def CheckedOK(self):

1930

1438

self.checked_ok()

1931

1439

1932

1440

# Enable - method

1933

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

1934

1441

@dbus.service.method(_interface)

1935

1442

def Enable(self):

1936

1443

"D-Bus method"

1937

1444

self.enable()

1938

1445

1939

1446

# StartChecker - method

1940

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

1941

1447

@dbus.service.method(_interface)

1942

1448

def StartChecker(self):

1943

1449

"D-Bus method"

1944

1450

self.start_checker()

1945

1451

1946

1452

# Disable - method

1947

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

1948

1453

@dbus.service.method(_interface)

1949

1454

def Disable(self):

1950

1455

"D-Bus method"

1951

1456

self.disable()

1952

1457

1953

1458

# StopChecker - method

1954

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

1955

1459

@dbus.service.method(_interface)

1956

1460

def StopChecker(self):

1957

1461

self.stop_checker()

1958

1959

# Properties

1960

1462

1463

## Properties

1464

1961

1465

# ApprovalPending - property

1962

1466

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

1963

1467

def ApprovalPending_dbus_property(self):

1964

1468

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

1965

1469

1966

1470

# ApprovedByDefault - property

1967

@dbus_service_property(_interface,

1968

signature="b",

1471

@dbus_service_property(_interface, signature="b",

1969

1472

access="readwrite")

1970

1473

def ApprovedByDefault_dbus_property(self, value=None):

1971

1474

if value is None: # get

1972

1475

return dbus.Boolean(self.approved_by_default)

1973

1476

self.approved_by_default = bool(value)

1974

1477

1975

1478

# ApprovalDelay - property

1976

@dbus_service_property(_interface,

1977

signature="t",

1479

@dbus_service_property(_interface, signature="t",

1978

1480

access="readwrite")

1979

1481

def ApprovalDelay_dbus_property(self, value=None):

1980

1482

if value is None: # get

1981

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

1982

* 1000)

1483

return dbus.UInt64(self.approval_delay_milliseconds())

1983

1484

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

1984

1485

1985

1486

# ApprovalDuration - property

1986

@dbus_service_property(_interface,

1987

signature="t",

1487

@dbus_service_property(_interface, signature="t",

1988

1488

access="readwrite")

1989

1489

def ApprovalDuration_dbus_property(self, value=None):

1990

1490

if value is None: # get

1991

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

1992

* 1000)

1491

return dbus.UInt64(timedelta_to_milliseconds(

1492

self.approval_duration))

1993

1493

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

1994

1494

1995

1495

# Name - property

1996

@dbus_annotations(

1997

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

1998

1496

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

1999

1497

def Name_dbus_property(self):

2000

1498

return dbus.String(self.name)

2001

1499

2002

1500

# Fingerprint - property

2003

@dbus_annotations(

2004

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

2005

1501

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

2006

1502

def Fingerprint_dbus_property(self):

2007

1503

return dbus.String(self.fingerprint)

2008

1504

2009

1505

# Host - property

2010

@dbus_service_property(_interface,

2011

signature="s",

1506

@dbus_service_property(_interface, signature="s",

2012

1507

access="readwrite")

2013

1508

def Host_dbus_property(self, value=None):

2014

1509

if value is None: # get

2015

1510

return dbus.String(self.host)

2016

self.host = str(value)

2017

1511

self.host = unicode(value)

1512

2018

1513

# Created - property

2019

@dbus_annotations(

2020

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

2021

1514

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

2022

1515

def Created_dbus_property(self):

2023

1516

return datetime_to_dbus(self.created)

2024

1517

2025

1518

# LastEnabled - property

2026

1519

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

2027

1520

def LastEnabled_dbus_property(self):

2028

1521

return datetime_to_dbus(self.last_enabled)

2029

1522

2030

1523

# Enabled - property

2031

@dbus_service_property(_interface,

2032

signature="b",

1524

@dbus_service_property(_interface, signature="b",

2033

1525

access="readwrite")

2034

1526

def Enabled_dbus_property(self, value=None):

2035

1527

if value is None: # get

2038

1530

self.enable()

2039

1531

else:

2040

1532

self.disable()

2041

1533

2042

1534

# LastCheckedOK - property

2043

@dbus_service_property(_interface,

2044

signature="s",

1535

@dbus_service_property(_interface, signature="s",

2045

1536

access="readwrite")

2046

1537

def LastCheckedOK_dbus_property(self, value=None):

2047

1538

if value is not None:

2048

1539

self.checked_ok()

2049

1540

return

2050

1541

return datetime_to_dbus(self.last_checked_ok)

2051

1542

2052

1543

# LastCheckerStatus - property

2053

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

1544

@dbus_service_property(_interface, signature="n",

1545

access="read")

2054

1546

def LastCheckerStatus_dbus_property(self):

2055

1547

return dbus.Int16(self.last_checker_status)

2056

1548

2057

1549

# Expires - property

2058

1550

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

2059

1551

def Expires_dbus_property(self):

2060

1552

return datetime_to_dbus(self.expires)

2061

1553

2062

1554

# LastApprovalRequest - property

2063

1555

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

2064

1556

def LastApprovalRequest_dbus_property(self):

2065

1557

return datetime_to_dbus(self.last_approval_request)

2066

1558

2067

1559

# Timeout - property

2068

@dbus_service_property(_interface,

2069

signature="t",

1560

@dbus_service_property(_interface, signature="t",

2070

1561

access="readwrite")

2071

1562

def Timeout_dbus_property(self, value=None):

2072

1563

if value is None: # get

2073

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

1564

return dbus.UInt64(self.timeout_milliseconds())

2074

1565

old_timeout = self.timeout

2075

1566

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

2076

1567

# Reschedule disabling

2084

1575

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

2085

1576

is None):

2086

1577

return

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

1578

gobject.source_remove(self.disable_initiator_tag)

1579

self.disable_initiator_tag = (

1580

gobject.timeout_add(

1581

timedelta_to_milliseconds(self.expires - now),

1582

self.disable))

1583

2092

1584

# ExtendedTimeout - property

2093

@dbus_service_property(_interface,

2094

signature="t",

1585

@dbus_service_property(_interface, signature="t",

2095

1586

access="readwrite")

2096

1587

def ExtendedTimeout_dbus_property(self, value=None):

2097

1588

if value is None: # get

2098

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

2099

* 1000)

1589

return dbus.UInt64(self.extended_timeout_milliseconds())

2100

1590

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

2101

1591

2102

1592

# Interval - property

2103

@dbus_service_property(_interface,

2104

signature="t",

1593

@dbus_service_property(_interface, signature="t",

2105

1594

access="readwrite")

2106

1595

def Interval_dbus_property(self, value=None):

2107

1596

if value is None: # get

2108

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

1597

return dbus.UInt64(self.interval_milliseconds())

2109

1598

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

2110

1599

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

2111

1600

return

2112

1601

if self.enabled:

2113

1602

# Reschedule checker run

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

1603

gobject.source_remove(self.checker_initiator_tag)

1604

self.checker_initiator_tag = (gobject.timeout_add

1605

(value, self.start_checker))

1606

self.start_checker() # Start one now, too

1607

2119

1608

# Checker - property

2120

@dbus_service_property(_interface,

2121

signature="s",

1609

@dbus_service_property(_interface, signature="s",

2122

1610

access="readwrite")

2123

1611

def Checker_dbus_property(self, value=None):

2124

1612

if value is None: # get

2125

1613

return dbus.String(self.checker_command)

2126

self.checker_command = str(value)

2127

1614

self.checker_command = unicode(value)

1615

2128

1616

# CheckerRunning - property

2129

@dbus_service_property(_interface,

2130

signature="b",

1617

@dbus_service_property(_interface, signature="b",

2131

1618

access="readwrite")

2132

1619

def CheckerRunning_dbus_property(self, value=None):

2133

1620

if value is None: # get

2136

1623

self.start_checker()

2137

1624

else:

2138

1625

self.stop_checker()

2139

1626

2140

1627

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

2144

1628

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

2145

1629

def ObjectPath_dbus_property(self):

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1630

return self.dbus_object_path # is already a dbus.ObjectPath

1631

2148

1632

# Secret = property

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)

1633

@dbus_service_property(_interface, signature="ay",

1634

access="write", byte_arrays=True)

2156

1635

def Secret_dbus_property(self, value):

2157

self.secret = bytes(value)

2158

1636

self.secret = str(value)

1637

2159

1638

del _interface

2160

1639

2161

1640

2164

1643

self._pipe = child_pipe

2165

1644

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

2166

1645

if not self._pipe.recv():

2167

raise KeyError(fpr)

2168

1646

raise KeyError()

1647

2169

1648

def __getattribute__(self, name):

2170

1649

if name == '_pipe':

2171

1650

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

2174

1653

if data[0] == 'data':

2175

1654

return data[1]

2176

1655

if data[0] == 'function':

2177

2178

1656

def func(*args, **kwargs):

2179

1657

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

2180

1658

return self._pipe.recv()[1]

2181

2182

1659

return func

2183

1660

2184

1661

def __setattr__(self, name, value):

2185

1662

if name == '_pipe':

2186

1663

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

2189

1666

2190

1667

class ClientHandler(socketserver.BaseRequestHandler, object):

2191

1668

"""A class to handle client connections.

2192

1669

2193

1670

Instantiated once for each connection to handle it.

2194

1671

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

2195

1672

2196

1673

def handle(self):

2197

1674

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

2198

1675

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

2199

str(self.client_address))

1676

unicode(self.client_address))

2200

1677

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

2201

1678

self.server.child_pipe.fileno())

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"))

1679

1680

session = (gnutls.connection

1681

.ClientSession(self.request,

1682

gnutls.connection

1683

.X509Credentials()))

1684

1685

# Note: gnutls.connection.X509Credentials is really a

1686

# generic GnuTLS certificate credentials object so long as

1687

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

1688

# here despite using OpenPGP certificates.

1689

1690

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

1691

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

1692

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

1693

# "+DHE-DSS"))

2209

1694

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

2210

1695

priority = self.server.gnutls_priority

2211

1696

if priority is None:

2212

1697

priority = "NORMAL"

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1698

(gnutls.library.functions

1699

.gnutls_priority_set_direct(session._c_object,

1700

priority, None))

1701

2217

1702

# Start communication using the Mandos protocol

2218

1703

# Get protocol number

2219

1704

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

2224

1709

except (ValueError, IndexError, RuntimeError) as error:

2225

1710

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

2226

1711

return

2227

1712

2228

1713

# Start GnuTLS connection

2229

1714

try:

2230

1715

session.handshake()

2231

except gnutls.Error as error:

1716

except gnutls.errors.GNUTLSError as error:

2232

1717

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

2233

1718

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

2234

1719

# established. Just abandon the request.

2235

1720

return

2236

1721

logger.debug("Handshake succeeded")

2237

1722

2238

1723

approval_required = False

2239

1724

try:

2240

1725

try:

2241

fpr = self.fingerprint(

2242

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1726

fpr = self.fingerprint(self.peer_certificate

1727

(session))

1728

except (TypeError,

1729

gnutls.errors.GNUTLSError) as error:

2244

1730

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

2245

1731

return

2246

1732

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

2247

1733

2248

1734

try:

2249

1735

client = ProxyClient(child_pipe, fpr,

2250

1736

self.client_address)

2251

1737

except KeyError:

2252

1738

return

2253

1739

2254

1740

if client.approval_delay:

2255

1741

delay = client.approval_delay

2256

1742

client.approvals_pending += 1

2257

1743

approval_required = True

2258

1744

2259

1745

while True:

2260

1746

if not client.enabled:

2261

1747

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

2262

client.name)

1748

client.name)

2263

1749

if self.server.use_dbus:

2264

1750

# Emit D-Bus signal

2265

1751

client.Rejected("Disabled")

2266

1752

return

2267

1753

2268

1754

if client.approved or not client.approval_delay:

2269

# We are approved or approval is disabled

1755

#We are approved or approval is disabled

2270

1756

break

2271

1757

elif client.approved is None:

2272

1758

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

2274

1760

if self.server.use_dbus:

2275

1761

# Emit D-Bus signal

2276

1762

client.NeedApproval(

2277

client.approval_delay.total_seconds()

2278

* 1000, client.approved_by_default)

1763

client.approval_delay_milliseconds(),

1764

client.approved_by_default)

2279

1765

else:

2280

1766

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

2281

1767

client.name)

2283

1769

# Emit D-Bus signal

2284

1770

client.Rejected("Denied")

2285

1771

return

2286

2287

# wait until timeout or approved

1772

1773

#wait until timeout or approved

2288

1774

time = datetime.datetime.now()

2289

1775

client.changedstate.acquire()

2290

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

1776

client.changedstate.wait(

1777

float(timedelta_to_milliseconds(delay)

1778

/ 1000))

2291

1779

client.changedstate.release()

2292

1780

time2 = datetime.datetime.now()

2293

1781

if (time2 - time) >= delay:

2303

1791

break

2304

1792

else:

2305

1793

delay -= time2 - time

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

1794

1795

sent_size = 0

1796

while sent_size < len(client.secret):

1797

try:

1798

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

1799

except gnutls.errors.GNUTLSError as error:

1800

logger.warning("gnutls send failed",

1801

exc_info=error)

1802

return

1803

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

1804

sent, len(client.secret)

1805

- (sent_size + sent))

1806

sent_size += sent

1807

2314

1808

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

2315

1809

# bump the timeout using extended_timeout

2316

1810

client.bump_timeout(client.extended_timeout)

2317

1811

if self.server.use_dbus:

2318

1812

# Emit D-Bus signal

2319

1813

client.GotSecret()

2320

1814

2321

1815

finally:

2322

1816

if approval_required:

2323

1817

client.approvals_pending -= 1

2324

1818

try:

2325

1819

session.bye()

2326

except gnutls.Error as error:

1820

except gnutls.errors.GNUTLSError as error:

2327

1821

logger.warning("GnuTLS bye failed",

2328

1822

exc_info=error)

2329

1823

2330

1824

@staticmethod

2331

1825

def peer_certificate(session):

2332

1826

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

2333

1827

# If not an OpenPGP certificate...

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1828

if (gnutls.library.functions

1829

.gnutls_certificate_type_get(session._c_object)

1830

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1831

# ...do the normal thing

1832

return session.peer_certificate

2338

1833

list_size = ctypes.c_uint(1)

2339

cert_list = (gnutls.certificate_get_peers

1834

cert_list = (gnutls.library.functions

1835

.gnutls_certificate_get_peers

2340

1836

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

2341

1837

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

2342

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

1838

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

1839

" certificate")

2343

1840

if list_size.value == 0:

2344

1841

return None

2345

1842

cert = cert_list[0]

2346

1843

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

2347

1844

2348

1845

@staticmethod

2349

1846

def fingerprint(openpgp):

2350

1847

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2351

1848

# New GnuTLS "datum" with the OpenPGP public key

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)))

1849

datum = (gnutls.library.types

1850

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

1851

ctypes.POINTER

1852

(ctypes.c_ubyte)),

1853

ctypes.c_uint(len(openpgp))))

2356

1854

# New empty GnuTLS certificate

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1855

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2359

1858

# Import the OpenPGP public key into the certificate

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1859

(gnutls.library.functions

1860

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

1861

gnutls.library.constants

1862

.GNUTLS_OPENPGP_FMT_RAW))

2362

1863

# Verify the self signature in the key

2363

1864

crtverify = ctypes.c_uint()

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1865

(gnutls.library.functions

1866

.gnutls_openpgp_crt_verify_self(crt, 0,

1867

ctypes.byref(crtverify)))

2366

1868

if crtverify.value != 0:

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError("Verify failed")

1869

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1870

raise (gnutls.errors.CertificateSecurityError

1871

("Verify failed"))

2369

1872

# New buffer for the fingerprint

2370

1873

buf = ctypes.create_string_buffer(20)

2371

1874

buf_len = ctypes.c_size_t()

2372

1875

# Get the fingerprint from the certificate into the buffer

2373

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

2374

ctypes.byref(buf_len))

1876

(gnutls.library.functions

1877

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

1878

ctypes.byref(buf_len)))

2375

1879

# Deinit the certificate

2376

gnutls.openpgp_crt_deinit(crt)

1880

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

1881

# Convert the buffer to a Python bytestring

2378

1882

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

2379

1883

# Convert the bytestring to hexadecimal notation

2383

1887

2384

1888

class MultiprocessingMixIn(object):

2385

1889

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

2386

2387

1890

def sub_process_main(self, request, address):

2388

1891

try:

2389

1892

self.finish_request(request, address)

2390

1893

except Exception:

2391

1894

self.handle_error(request, address)

2392

1895

self.close_request(request)

2393

1896

2394

1897

def process_request(self, request, address):

2395

1898

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

2396

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

2397

args=(request, address))

1899

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

1900

args = (request, address))

2398

1901

proc.start()

2399

1902

return proc

2400

1903

2401

1904

2402

1905

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2403

1906

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

2404

2405

1907

def process_request(self, request, client_address):

2406

1908

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

2407

1909

2408

1910

This function creates a new pipe in self.pipe

2409

1911

"""

2410

1912

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2411

1913

2412

1914

proc = MultiprocessingMixIn.process_request(self, request,

2413

1915

client_address)

2414

1916

self.child_pipe.close()

2415

1917

self.add_pipe(parent_pipe, proc)

2416

1918

2417

1919

def add_pipe(self, parent_pipe, proc):

2418

1920

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

2419

1921

raise NotImplementedError()

2422

1924

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2423

1925

socketserver.TCPServer, object):

2424

1926

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

2425

1927

2426

1928

Attributes:

2427

1929

enabled: Boolean; whether this server is activated yet

2428

1930

interface: None or a network interface name (string)

2429

1931

use_ipv6: Boolean; to use IPv6 or not

2430

1932

"""

2431

2432

1933

def __init__(self, server_address, RequestHandlerClass,

2433

interface=None,

2434

use_ipv6=True,

2435

socketfd=None):

1934

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

2436

1935

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

2437

1936

creating a new one with socket.socket().

2438

1937

"""

2444

1943

self.socketfd = socketfd

2445

1944

# Save the original socket.socket() function

2446

1945

self.socket_socket = socket.socket

2447

2448

1946

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

2449

#

1947

#

2450

1948

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

2451

1949

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

2452

1950

# patching socket.socket.)

2453

#

1951

#

2454

1952

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

2455

1953

@functools.wraps(socket.socket)

2456

1954

def socket_wrapper(*args, **kwargs):

2468

1966

# socket_wrapper(), if socketfd was set.

2469

1967

socketserver.TCPServer.__init__(self, server_address,

2470

1968

RequestHandlerClass)

2471

1969

2472

1970

def server_bind(self):

2473

1971

"""This overrides the normal server_bind() function

2474

1972

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

2475

1973

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

2476

global SO_BINDTODEVICE

2477

1974

if self.interface is not None:

2478

1975

if SO_BINDTODEVICE is None:

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

1976

logger.error("SO_BINDTODEVICE does not exist;"

1977

" cannot bind to interface %s",

1978

self.interface)

1979

else:

1980

try:

1981

self.socket.setsockopt(socket.SOL_SOCKET,

1982

SO_BINDTODEVICE,

1983

str(self.interface + '\0'))

1984

except socket.error as error:

1985

if error.errno == errno.EPERM:

1986

logger.error("No permission to bind to"

1987

" interface %s", self.interface)

1988

elif error.errno == errno.ENOPROTOOPT:

1989

logger.error("SO_BINDTODEVICE not available;"

1990

" cannot bind to interface %s",

1991

self.interface)

1992

elif error.errno == errno.ENODEV:

1993

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

1994

" cannot bind", self.interface)

1995

else:

1996

raise

2500

1997

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

2501

1998

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

2502

1999

if not self.server_address[0]:

2503

2000

if self.address_family == socket.AF_INET6:

2504

any_address = "::" # in6addr_any

2001

any_address = "::" # in6addr_any

2505

2002

else:

2506

any_address = "0.0.0.0" # INADDR_ANY

2003

any_address = "0.0.0.0" # INADDR_ANY

2507

2004

self.server_address = (any_address,

2508

2005

self.server_address[1])

2509

2006

elif not self.server_address[1]:

2510

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

2007

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

2008

0)

2511

2009

# if self.interface:

2512

2010

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

2513

2011

# 0, # port

2519

2017

2520

2018

class MandosServer(IPv6_TCPServer):

2521

2019

"""Mandos server.

2522

2020

2523

2021

Attributes:

2524

2022

clients: set of Client objects

2525

2023

gnutls_priority GnuTLS priority string

2526

2024

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

2527

2528

Assumes a GLib.MainLoop event loop.

2025

2026

Assumes a gobject.MainLoop event loop.

2529

2027

"""

2530

2531

2028

def __init__(self, server_address, RequestHandlerClass,

2532

interface=None,

2533

use_ipv6=True,

2534

clients=None,

2535

gnutls_priority=None,

2536

use_dbus=True,

2537

socketfd=None):

2029

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

2030

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

2538

2031

self.enabled = False

2539

2032

self.clients = clients

2540

2033

if self.clients is None:

2543

2036

self.gnutls_priority = gnutls_priority

2544

2037

IPv6_TCPServer.__init__(self, server_address,

2545

2038

RequestHandlerClass,

2546

interface=interface,

2547

use_ipv6=use_ipv6,

2548

socketfd=socketfd)

2549

2039

interface = interface,

2040

use_ipv6 = use_ipv6,

2041

socketfd = socketfd)

2550

2042

def server_activate(self):

2551

2043

if self.enabled:

2552

2044

return socketserver.TCPServer.server_activate(self)

2553

2045

2554

2046

def enable(self):

2555

2047

self.enabled = True

2556

2048

2557

2049

def add_pipe(self, parent_pipe, proc):

2558

2050

# Call "handle_ipc" for both data and EOF events

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):

2051

gobject.io_add_watch(parent_pipe.fileno(),

2052

gobject.IO_IN | gobject.IO_HUP,

2053

functools.partial(self.handle_ipc,

2054

parent_pipe =

2055

parent_pipe,

2056

proc = proc))

2057

2058

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

2059

proc = None, client_object=None):

2570

2060

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

2571

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

2061

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

2572

2062

# Wait for other process to exit

2573

2063

proc.join()

2574

2064

return False

2575

2065

2576

2066

# Read a request from the child

2577

2067

request = parent_pipe.recv()

2578

2068

command = request[0]

2579

2069

2580

2070

if command == 'init':

2581

2071

fpr = request[1]

2582

2072

address = request[2]

2583

2584

for c in self.clients.values():

2073

2074

for c in self.clients.itervalues():

2585

2075

if c.fingerprint == fpr:

2586

2076

client = c

2587

2077

break

2594

2084

address[0])

2595

2085

parent_pipe.send(False)

2596

2086

return False

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))

2087

2088

gobject.io_add_watch(parent_pipe.fileno(),

2089

gobject.IO_IN | gobject.IO_HUP,

2090

functools.partial(self.handle_ipc,

2091

parent_pipe =

2092

parent_pipe,

2093

proc = proc,

2094

client_object =

2095

client))

2605

2096

parent_pipe.send(True)

2606

2097

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

2607

2098

# same fileno

2610

2101

funcname = request[1]

2611

2102

args = request[2]

2612

2103

kwargs = request[3]

2613

2104

2614

2105

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

2615

2106

funcname)(*args,

2616

**kwargs)))

2617

2107

**kwargs)))

2108

2618

2109

if command == 'getattr':

2619

2110

attrname = request[1]

2620

if isinstance(client_object.__getattribute__(attrname),

2621

collections.Callable):

2622

parent_pipe.send(('function', ))

2111

if callable(client_object.__getattribute__(attrname)):

2112

parent_pipe.send(('function',))

2623

2113

else:

2624

parent_pipe.send((

2625

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

2626

2114

parent_pipe.send(('data', client_object

2115

.__getattribute__(attrname)))

2116

2627

2117

if command == 'setattr':

2628

2118

attrname = request[1]

2629

2119

value = request[2]

2630

2120

setattr(client_object, attrname, value)

2631

2121

2632

2122

return True

2633

2123

2634

2124

2635

2125

def rfc3339_duration_to_delta(duration):

2636

2126

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

2637

2127

2638

2128

>>> rfc3339_duration_to_delta("P7D")

2639

2129

datetime.timedelta(7)

2640

2130

>>> rfc3339_duration_to_delta("PT60S")

2650

2140

>>> rfc3339_duration_to_delta("P1DT3M20S")

2651

2141

datetime.timedelta(1, 200)

2652

2142

"""

2653

2143

2654

2144

# Parsing an RFC 3339 duration with regular expressions is not

2655

2145

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

2656

2146

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

2657

2147

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

2658

2148

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

2659

2149

# avoid excessive use of external libraries.

2660

2150

2661

2151

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

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

2152

Token = collections.namedtuple("Token",

2153

("regexp", # To match token; if

2154

# "value" is not None,

2155

# must have a "group"

2156

# containing digits

2157

"value", # datetime.timedelta or

2158

# None

2159

"followers")) # Tokens valid after

2160

# this token

2667

2161

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

2668

2162

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

2669

2163

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

2670

2164

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

2671

2165

datetime.timedelta(seconds=1),

2672

frozenset((token_end, )))

2166

frozenset((token_end,)))

2673

2167

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

2674

2168

datetime.timedelta(minutes=1),

2675

2169

frozenset((token_second, token_end)))

2691

2185

frozenset((token_month, token_end)))

2692

2186

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

2693

2187

datetime.timedelta(weeks=1),

2694

frozenset((token_end, )))

2188

frozenset((token_end,)))

2695

2189

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

2696

2190

frozenset((token_year, token_month,

2697

2191

token_day, token_time,

2698

token_week)))

2699

# Define starting values:

2700

# Value so far

2701

value = datetime.timedelta()

2192

token_week))),

2193

# Define starting values

2194

value = datetime.timedelta() # Value so far

2702

2195

found_token = None

2703

# Following valid tokens

2704

followers = frozenset((token_duration, ))

2705

# String left to parse

2706

s = duration

2196

followers = frozenset(token_duration,) # Following valid tokens

2197

s = duration # String left to parse

2707

2198

# Loop until end token is found

2708

2199

while found_token is not token_end:

2709

2200

# Search for any currently valid tokens

2725

2216

break

2726

2217

else:

2727

2218

# No currently valid tokens were found

2728

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

2729

.format(duration))

2219

raise ValueError("Invalid RFC 3339 duration")

2730

2220

# End token found

2731

2221

return value

2732

2222

2733

2223

2734

2224

def string_to_delta(interval):

2735

2225

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

2736

2226

2737

2227

>>> string_to_delta('7d')

2738

2228

datetime.timedelta(7)

2739

2229

>>> string_to_delta('60s')

2747

2237

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

2748

2238

datetime.timedelta(0, 330)

2749

2239

"""

2750

2240

2751

2241

try:

2752

2242

return rfc3339_duration_to_delta(interval)

2753

2243

except ValueError:

2754

2244

pass

2755

2245

2756

2246

timevalue = datetime.timedelta(0)

2757

2247

for s in interval.split():

2758

2248

try:

2759

suffix = s[-1]

2249

suffix = unicode(s[-1])

2760

2250

value = int(s[:-1])

2761

2251

if suffix == "d":

2762

2252

delta = datetime.timedelta(value)

2769

2259

elif suffix == "w":

2770

2260

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

2771

2261

else:

2772

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

2262

raise ValueError("Unknown suffix {0!r}"

2263

.format(suffix))

2773

2264

except IndexError as e:

2774

2265

raise ValueError(*(e.args))

2775

2266

timevalue += delta

2776

2267

return timevalue

2777

2268

2778

2269

2779

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

2270

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

2780

2271

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

2781

2272

2782

2273

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

2783

2274

if os.fork():

2784

2275

sys.exit()

2792

2283

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

2793

2284

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

2794

2285

raise OSError(errno.ENODEV,

2795

"{} not a character device"

2286

"{0} not a character device"

2796

2287

.format(os.devnull))

2797

2288

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

2798

2289

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

2802

2293

2803

2294

2804

2295

def main():

2805

2296

2806

2297

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

2807

2298

# Parsing of options, both command line and config file

2808

2299

2809

2300

parser = argparse.ArgumentParser()

2810

2301

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

2811

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

2302

version = "%(prog)s {0}".format(version),

2812

2303

help="show version number and exit")

2813

2304

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

2814

2305

help="Bind to interface IF")

2847

2338

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

2848

2339

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

2849

2340

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

2850

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

2851

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

2852

default=None)

2853

2341

2854

2342

options = parser.parse_args()

2855

2343

2856

2344

if options.check:

2857

2345

import doctest

2858

2346

fail_count, test_count = doctest.testmod()

2859

2347

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

2860

2348

2861

2349

# Default values for config file for server-global settings

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

2350

server_defaults = { "interface": "",

2351

"address": "",

2352

"port": "",

2353

"debug": "False",

2354

"priority":

2355

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

2356

"servicename": "Mandos",

2357

"use_dbus": "True",

2358

"use_ipv6": "True",

2359

"debuglevel": "",

2360

"restore": "True",

2361

"socket": "",

2362

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

2363

"foreground": "False",

2364

}

2365

2880

2366

# Parse config file for server-global settings

2881

2367

server_config = configparser.SafeConfigParser(server_defaults)

2882

2368

del server_defaults

2883

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

2369

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

2370

"mandos.conf"))

2884

2371

# Convert the SafeConfigParser object to a dict

2885

2372

server_settings = server_config.defaults()

2886

2373

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

2887

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

2888

"foreground", "zeroconf"):

2374

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

2889

2375

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

2890

2376

option)

2891

2377

if server_settings["port"]:

2901

2387

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

2902

2388

["socket"])

2903

2389

del server_config

2904

2390

2905

2391

# Override the settings from the config file with command line

2906

2392

# options, if set.

2907

2393

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

2908

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

2909

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

2910

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

2394

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

2395

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

2396

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

2911

2397

value = getattr(options, option)

2912

2398

if value is not None:

2913

2399

server_settings[option] = value

2914

2400

del options

2915

2401

# Force all strings to be unicode

2916

2402

for option in server_settings.keys():

2917

if isinstance(server_settings[option], bytes):

2918

server_settings[option] = (server_settings[option]

2919

.decode("utf-8"))

2403

if type(server_settings[option]) is str:

2404

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

2920

2405

# Force all boolean options to be boolean

2921

2406

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

2922

"foreground", "zeroconf"):

2407

"foreground"):

2923

2408

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

2924

2409

# Debug implies foreground

2925

2410

if server_settings["debug"]:

2926

2411

server_settings["foreground"] = True

2927

2412

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

2928

2413

2929

2414

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

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

2415

2936

2416

# For convenience

2937

2417

debug = server_settings["debug"]

2938

2418

debuglevel = server_settings["debuglevel"]

2941

2421

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

2942

2422

stored_state_file)

2943

2423

foreground = server_settings["foreground"]

2944

zeroconf = server_settings["zeroconf"]

2945

2424

2946

2425

if debug:

2947

2426

initlogger(debug, logging.DEBUG)

2948

2427

else:

2951

2430

else:

2952

2431

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

2953

2432

initlogger(debug, level)

2954

2433

2955

2434

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

2956

syslogger.setFormatter(

2957

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

2958

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

2959

server_settings["servicename"])))

2960

2435

syslogger.setFormatter(logging.Formatter

2436

('Mandos ({0}) [%(process)d]:'

2437

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

2438

.format(server_settings

2439

["servicename"])))

2440

2961

2441

# Parse config file with clients

2962

2442

client_config = configparser.SafeConfigParser(Client

2963

2443

.client_defaults)

2964

2444

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

2965

2445

"clients.conf"))

2966

2446

2967

2447

global mandos_dbus_service

2968

2448

mandos_dbus_service = None

2969

2970

socketfd = None

2971

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

2972

socketfd = server_settings["socket"]

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)

2449

2450

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

2451

server_settings["port"]),

2452

ClientHandler,

2453

interface=(server_settings["interface"]

2454

or None),

2455

use_ipv6=use_ipv6,

2456

gnutls_priority=

2457

server_settings["priority"],

2458

use_dbus=use_dbus,

2459

socketfd=(server_settings["socket"]

2460

or None))

2981

2461

if not foreground:

2982

2462

pidfilename = "/run/mandos.pid"

2983

2463

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

2984

2464

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

2985

2465

pidfile = None

2986

2466

try:

2987

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

2467

pidfile = open(pidfilename, "w")

2988

2468

except IOError as e:

2989

2469

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

2990

2470

exc_info=e)

2991

2992

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

2993

("mandos", "mandos"),

2994

("nobody", "nogroup")):

2471

2472

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

2995

2473

try:

2996

2474

uid = pwd.getpwnam(name).pw_uid

2997

gid = pwd.getpwnam(group).pw_gid

2475

gid = pwd.getpwnam(name).pw_gid

2998

2476

break

2999

2477

except KeyError:

3000

2478

continue

3004

2482

try:

3005

2483

os.setgid(gid)

3006

2484

os.setuid(uid)

3007

if debug:

3008

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

3009

gid))

3010

2485

except OSError as error:

3011

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

3012

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

3013

2486

if error.errno != errno.EPERM:

3014

2487

raise

3015

2488

3016

2489

if debug:

3017

2490

# Enable all possible GnuTLS debugging

3018

2491

3019

2492

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

3020

2493

# - GnuTLS manual

3021

gnutls.global_set_log_level(11)

3022

3023

@gnutls.log_func

2494

gnutls.library.functions.gnutls_global_set_log_level(11)

2495

2496

@gnutls.library.types.gnutls_log_func

3024

2497

def debug_gnutls(level, string):

3025

2498

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

3026

3027

gnutls.global_set_log_function(debug_gnutls)

3028

2499

2500

(gnutls.library.functions

2501

.gnutls_global_set_log_function(debug_gnutls))

2502

3029

2503

# Redirect stdin so all checkers get /dev/null

3030

2504

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

3031

2505

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

3032

2506

if null > 2:

3033

2507

os.close(null)

3034

2508

3035

2509

# Need to fork before connecting to D-Bus

3036

2510

if not foreground:

3037

2511

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

3038

2512

daemon()

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

2513

2514

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

2515

# need to inform gobject that threads will be used.

2516

gobject.threads_init()

2517

3044

2518

global main_loop

3045

2519

# From the Avahi example code

3046

2520

DBusGMainLoop(set_as_default=True)

3047

main_loop = GLib.MainLoop()

2521

main_loop = gobject.MainLoop()

3048

2522

bus = dbus.SystemBus()

3049

2523

# End of Avahi example code

3050

2524

if use_dbus:

3051

2525

try:

3052

2526

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

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:

2527

bus, do_not_queue=True)

2528

old_bus_name = (dbus.service.BusName

2529

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

2530

do_not_queue=True))

2531

except dbus.exceptions.NameExistsException as e:

3059

2532

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

3060

2533

use_dbus = False

3061

2534

server_settings["use_dbus"] = False

3062

2535

tcp_server.use_dbus = False

3063

if zeroconf:

3064

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3065

service = AvahiServiceToSyslog(

3066

name=server_settings["servicename"],

3067

servicetype="_mandos._tcp",

3068

protocol=protocol,

3069

bus=bus)

3070

if server_settings["interface"]:

3071

service.interface = if_nametoindex(

3072

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

3073

2536

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2537

service = AvahiServiceToSyslog(name =

2538

server_settings["servicename"],

2539

servicetype = "_mandos._tcp",

2540

protocol = protocol, bus = bus)

2541

if server_settings["interface"]:

2542

service.interface = (if_nametoindex

2543

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

2544

3074

2545

global multiprocessing_manager

3075

2546

multiprocessing_manager = multiprocessing.Manager()

3076

2547

3077

2548

client_class = Client

3078

2549

if use_dbus:

3079

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

3080

2550

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

2551

3081

2552

client_settings = Client.config_parser(client_config)

3082

2553

old_client_settings = {}

3083

2554

clients_data = {}

3084

2555

3085

2556

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

3086

2557

global wnull

3087

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

2558

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

3088

2559

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

3089

2560

# mode

3090

2561

if debug or not foreground:

3091

2562

wnull.close()

3092

2563

3093

2564

# Get client data and settings from last running state.

3094

2565

if server_settings["restore"]:

3095

2566

try:

3096

2567

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

2568

clients_data, old_client_settings = (pickle.load

2569

(stored_state))

3142

2570

os.remove(stored_state_path)

3143

2571

except IOError as e:

3144

2572

if e.errno == errno.ENOENT:

3145

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

3146

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

2573

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

2574

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

3147

2575

else:

3148

2576

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

3149

2577

exc_info=e)

3150

2578

raise

3151

2579

except EOFError as e:

3152

2580

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

3153

"EOFError:",

3154

exc_info=e)

3155

2581

"EOFError:", exc_info=e)

2582

3156

2583

with PGPEngine() as pgp:

3157

for client_name, client in clients_data.items():

2584

for client_name, client in clients_data.iteritems():

3158

2585

# Skip removed clients

3159

2586

if client_name not in client_settings:

3160

2587

continue

3161

2588

3162

2589

# Decide which value to use after restoring saved state.

3163

2590

# We have three different values: Old config file,

3164

2591

# new config file, and saved state.

3169

2596

# For each value in new config, check if it

3170

2597

# differs from the old config value (Except for

3171

2598

# the "secret" attribute)

3172

if (name != "secret"

3173

and (value !=

3174

old_client_settings[client_name][name])):

2599

if (name != "secret" and

2600

value != old_client_settings[client_name]

2601

[name]):

3175

2602

client[name] = value

3176

2603

except KeyError:

3177

2604

pass

3178

2605

3179

2606

# Clients who has passed its expire date can still be

3180

# enabled if its last checker was successful. A Client

2607

# enabled if its last checker was successful. Clients

3181

2608

# whose checker succeeded before we stored its state is

3182

2609

# assumed to have successfully run all checkers during

3183

2610

# downtime.

3185

2612

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

3186

2613

if not client["last_checked_ok"]:

3187

2614

logger.warning(

3188

"disabling client {} - Client never "

3189

"performed a successful checker".format(

3190

client_name))

2615

"disabling client {0} - Client never "

2616

"performed a successful checker"

2617

.format(client_name))

3191

2618

client["enabled"] = False

3192

2619

elif client["last_checker_status"] != 0:

3193

2620

logger.warning(

3194

"disabling client {} - Client last"

3195

" checker failed with error code"

3196

" {}".format(

3197

client_name,

3198

client["last_checker_status"]))

2621

"disabling client {0} - Client "

2622

"last checker failed with error code {1}"

2623

.format(client_name,

2624

client["last_checker_status"]))

3199

2625

client["enabled"] = False

3200

2626

else:

3201

client["expires"] = (

3202

datetime.datetime.utcnow()

3203

+ client["timeout"])

2627

client["expires"] = (datetime.datetime

2628

.utcnow()

2629

+ client["timeout"])

3204

2630

logger.debug("Last checker succeeded,"

3205

" keeping {} enabled".format(

3206

client_name))

2631

" keeping {0} enabled"

2632

.format(client_name))

3207

2633

try:

3208

client["secret"] = pgp.decrypt(

3209

client["encrypted_secret"],

3210

client_settings[client_name]["secret"])

2634

client["secret"] = (

2635

pgp.decrypt(client["encrypted_secret"],

2636

client_settings[client_name]

2637

["secret"]))

3211

2638

except PGPError:

3212

2639

# If decryption fails, we use secret from new settings

3213

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

3214

client_name))

3215

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

3216

["secret"])

3217

2640

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

2641

.format(client_name))

2642

client["secret"] = (

2643

client_settings[client_name]["secret"])

2644

3218

2645

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

3219

2646

for client_name in (set(old_client_settings)

3220

2647

- set(client_settings)):

3222

2649

for client_name in (set(client_settings)

3223

2650

- set(old_client_settings)):

3224

2651

clients_data[client_name] = client_settings[client_name]

3225

2652

3226

2653

# Create all client objects

3227

for client_name, client in clients_data.items():

2654

for client_name, client in clients_data.iteritems():

3228

2655

tcp_server.clients[client_name] = client_class(

3229

name=client_name,

3230

settings=client,

3231

server_settings=server_settings)

3232

2656

name = client_name, settings = client,

2657

server_settings = server_settings)

2658

3233

2659

if not tcp_server.clients:

3234

2660

logger.warning("No clients defined")

3235

2661

3236

2662

if not foreground:

3237

2663

if pidfile is not None:

3238

pid = os.getpid()

3239

2664

try:

3240

2665

with pidfile:

3241

print(pid, file=pidfile)

2666

pid = os.getpid()

2667

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

3242

2668

except IOError:

3243

2669

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

3244

2670

pidfilename, pid)

3245

2671

del pidfile

3246

2672

del pidfilename

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

2673

2674

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

2675

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

2676

3252

2677

if use_dbus:

3253

3254

@alternate_dbus_interfaces(

3255

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

3256

class MandosDBusService(DBusObjectWithObjectManager):

2678

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

2679

"se.bsnet.fukt.Mandos"})

2680

class MandosDBusService(DBusObjectWithProperties):

3257

2681

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

3258

3259

2682

def __init__(self):

3260

2683

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

3261

3262

2684

_interface = "se.recompile.Mandos"

3263

2685

2686

@dbus_interface_annotations(_interface)

2687

def _foo(self):

2688

return { "org.freedesktop.DBus.Property"

2689

".EmitsChangedSignal":

2690

"false"}

2691

3264

2692

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

3265

2693

def ClientAdded(self, objpath):

3266

2694

"D-Bus signal"

3267

2695

pass

3268

2696

3269

2697

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

3270

2698

def ClientNotFound(self, fingerprint, address):

3271

2699

"D-Bus signal"

3272

2700

pass

3273

3274

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

3275

"true"})

2701

3276

2702

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

3277

2703

def ClientRemoved(self, objpath, name):

3278

2704

"D-Bus signal"

3279

2705

pass

3280

3281

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

3282

"true"})

2706

3283

2707

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

3284

2708

def GetAllClients(self):

3285

2709

"D-Bus method"

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"})

2710

return dbus.Array(c.dbus_object_path

2711

for c in

2712

tcp_server.clients.itervalues())

2713

3291

2714

@dbus.service.method(_interface,

3292

2715

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

3293

2716

def GetAllClientsWithProperties(self):

3294

2717

"D-Bus method"

3295

2718

return dbus.Dictionary(

3296

{c.dbus_object_path: c.GetAll(

3297

"se.recompile.Mandos.Client")

3298

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

2719

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

2720

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

3299

2721

signature="oa{sv}")

3300

2722

3301

2723

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

3302

2724

def RemoveClient(self, object_path):

3303

2725

"D-Bus method"

3304

for c in tcp_server.clients.values():

2726

for c in tcp_server.clients.itervalues():

3305

2727

if c.dbus_object_path == object_path:

3306

2728

del tcp_server.clients[c.name]

3307

2729

c.remove_from_connection()

3308

# Don't signal the disabling

2730

# Don't signal anything except ClientRemoved

3309

2731

c.disable(quiet=True)

3310

# Emit D-Bus signal for removal

3311

self.client_removed_signal(c)

2732

# Emit D-Bus signal

2733

self.ClientRemoved(object_path, c.name)

3312

2734

return

3313

2735

raise KeyError(object_path)

3314

2736

3315

2737

del _interface

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

2738

3353

2739

mandos_dbus_service = MandosDBusService()

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

2740

3360

2741

def cleanup():

3361

2742

"Cleanup function; run on exit"

3362

if zeroconf:

3363

service.cleanup()

3364

3365

mp.active_children()

3366

wn.close()

2743

service.cleanup()

2744

2745

multiprocessing.active_children()

2746

wnull.close()

3367

2747

if not (tcp_server.clients or client_settings):

3368

2748

return

3369

2749

3370

2750

# Store client before exiting. Secrets are encrypted with key

3371

2751

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

3372

2752

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

3373

2753

clients = {}

3374

2754

with PGPEngine() as pgp:

3375

for client in tcp_server.clients.values():

2755

for client in tcp_server.clients.itervalues():

3376

2756

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

3377

2757

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

3378

2758

key)

3379

2759

client_dict = {}

3380

2760

3381

2761

# A list of attributes that can not be pickled

3382

2762

# + secret.

3383

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

3384

"checker", "server_settings"}

3385

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

3386

.Object):

2763

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

2764

"checker", "server_settings"))

2765

for name, typ in (inspect.getmembers

2766

(dbus.service.Object)):

3387

2767

exclude.add(name)

3388

2768

3389

2769

client_dict["encrypted_secret"] = (client

3390

2770

.encrypted_secret)

3391

2771

for attr in client.client_structure:

3392

2772

if attr not in exclude:

3393

2773

client_dict[attr] = getattr(client, attr)

3394

2774

3395

2775

clients[client.name] = client_dict

3396

2776

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

3397

2777

3398

2778

try:

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

with (tempfile.NamedTemporaryFile

2780

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

2781

dir=os.path.dirname(stored_state_path),

2782

delete=False)) as stored_state:

2783

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

2784

tempname=stored_state.name

3408

2785

os.rename(tempname, stored_state_path)

3409

2786

except (IOError, OSError) as e:

3410

2787

if not debug:

3413

2790

except NameError:

3414

2791

pass

3415

2792

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

3416

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

2793

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

3417

2794

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

3418

2795

else:

3419

2796

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

3420

2797

exc_info=e)

3421

2798

raise

3422

2799

3423

2800

# Delete all clients, and settings from config

3424

2801

while tcp_server.clients:

3425

2802

name, client = tcp_server.clients.popitem()

3426

2803

if use_dbus:

3427

2804

client.remove_from_connection()

3428

# Don't signal the disabling

2805

# Don't signal anything except ClientRemoved

3429

2806

client.disable(quiet=True)

3430

# Emit D-Bus signal for removal

3431

2807

if use_dbus:

3432

mandos_dbus_service.client_removed_signal(client)

2808

# Emit D-Bus signal

2809

mandos_dbus_service.ClientRemoved(client

2810

.dbus_object_path,

2811

client.name)

3433

2812

client_settings.clear()

3434

2813

3435

2814

atexit.register(cleanup)

3436

3437

for client in tcp_server.clients.values():

2815

2816

for client in tcp_server.clients.itervalues():

3438

2817

if use_dbus:

3439

# Emit D-Bus signal for adding

3440

mandos_dbus_service.client_added_signal(client)

2818

# Emit D-Bus signal

2819

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3441

2820

# Need to initiate checking of clients

3442

2821

if client.enabled:

3443

2822

client.init_checker()

3444

2823

3445

2824

tcp_server.enable()

3446

2825

tcp_server.server_activate()

3447

2826

3448

2827

# Find out what port we got

3449

if zeroconf:

3450

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

2828

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

3451

2829

if use_ipv6:

3452

2830

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

3453

2831

" flowinfo %d, scope_id %d",

3455

2833

else: # IPv4

3456

2834

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

3457

2835

*tcp_server.socket.getsockname())

3458

3459

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

3460

2836

2837

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

2838

3461

2839

try:

3462

if zeroconf:

3463

# From the Avahi example code

3464

try:

3465

service.activate()

3466

except dbus.exceptions.DBusException as error:

3467

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

3468

cleanup()

3469

sys.exit(1)

3470

# End of Avahi example code

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

2840

# From the Avahi example code

2841

try:

2842

service.activate()

2843

except dbus.exceptions.DBusException as error:

2844

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

2845

cleanup()

2846

sys.exit(1)

2847

# End of Avahi example code

2848

2849

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

2850

lambda *args, **kwargs:

2851

(tcp_server.handle_request

2852

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

2853

3477

2854

logger.debug("Starting main loop")

3478

2855

main_loop.run()

3479

2856

except AvahiError as error:

3488

2865

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

3489

2866

cleanup()

3490

2867

3491

3492

2868

if __name__ == '__main__':

3493

2869

main()