/mandos/trunk : revision 921

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.4"

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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 = "1.7.16"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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

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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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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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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(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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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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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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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):

291

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

292

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

293

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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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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class AvahiError(Exception):

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

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self.value = value

226

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

227

def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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314

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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321

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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, 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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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,

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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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self.interface = interface

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352

self.name = name

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self.type = servicetype

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362

self.server = None

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self.bus = bus

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364

self.entry_group_state_changed_match = None

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def rename(self):

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366

def rename(self, remove=True):

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

279

368

if self.rename_count >= self.max_renames:

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369

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

281

370

" after %i retries, exiting.",

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self.rename_count)

283

372

raise AvahiServiceError("Too many renames")

284

self.name = unicode(self.server

285

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

286

376

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

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377

self.name)

288

self.remove()

378

if remove:

379

self.remove()

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try:

290

381

self.add()

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382

except dbus.exceptions.DBusException as error:

292

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

293

self.cleanup()

294

os._exit(1)

295

self.rename_count += 1

296

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

297

392

def remove(self):

298

393

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

299

394

if self.entry_group_state_changed_match is not None:

301

396

self.entry_group_state_changed_match = None

302

397

if self.group is not None:

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398

self.group.Reset()

304

399

305

400

def add(self):

306

401

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

307

402

self.remove()

324

419

dbus.UInt16(self.port),

325

420

avahi.string_array_to_txt_array(self.TXT))

326

421

self.group.Commit()

327

422

328

423

def entry_group_state_changed(self, state, error):

329

424

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

330

425

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

331

426

332

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

333

428

logger.debug("Zeroconf service established.")

334

429

elif state == avahi.ENTRY_GROUP_COLLISION:

336

431

self.rename()

337

432

elif state == avahi.ENTRY_GROUP_FAILURE:

338

433

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

339

unicode(error))

340

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

341

.format(error))

342

434

str(error))

435

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

436

343

437

def cleanup(self):

344

438

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

345

439

if self.group is not None:

350

444

pass

351

445

self.group = None

352

446

self.remove()

353

447

354

448

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

355

449

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

356

450

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

357

bad_states = { avahi.SERVER_INVALID:

358

"Zeroconf server invalid",

359

avahi.SERVER_REGISTERING: None,

360

avahi.SERVER_COLLISION:

361

"Zeroconf server name collision",

362

avahi.SERVER_FAILURE:

363

"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

364

457

if state in bad_states:

365

458

if bad_states[state] is not None:

366

459

if error is None:

369

462

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

370

463

self.cleanup()

371

464

elif state == avahi.SERVER_RUNNING:

372

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

373

477

else:

374

478

if error is None:

375

479

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

376

480

else:

377

481

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

378

482

379

483

def activate(self):

380

484

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

381

485

if self.server is None:

385

489

follow_name_owner_changes=True),

386

490

avahi.DBUS_INTERFACE_SERVER)

387

491

self.server.connect_to_signal("StateChanged",

388

self.server_state_changed)

492

self.server_state_changed)

389

493

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

390

494

391

495

392

496

class AvahiServiceToSyslog(AvahiService):

393

def rename(self):

497

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

394

498

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

395

ret = AvahiService.rename(self)

396

syslogger.setFormatter(logging.Formatter

397

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

398

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

399

.format(self.name)))

499

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

500

**kwargs)

501

syslogger.setFormatter(logging.Formatter(

502

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

503

.format(self.name)))

400

504

return ret

401

505

402

506

403

def timedelta_to_milliseconds(td):

404

"Convert a datetime.timedelta() to milliseconds"

405

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

406

+ (td.seconds * 1000)

407

+ (td.microseconds // 1000))

507

# Pretend that we have a GnuTLS module

508

class GnuTLS(object):

509

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

510

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

511

512

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

513

if library is None:

514

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

515

_library = ctypes.cdll.LoadLibrary(library)

516

del library

517

_need_version = b"3.3.0"

518

519

def __init__(self):

520

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

521

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

522

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

523

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

524

.format(self._need_version))

525

526

# Unless otherwise indicated, the constants and types below are

527

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

528

529

# Constants

530

E_SUCCESS = 0

531

E_INTERRUPTED = -52

532

E_AGAIN = -28

533

CRT_OPENPGP = 2

534

CLIENT = 2

535

SHUT_RDWR = 0

536

CRD_CERTIFICATE = 1

537

E_NO_CERTIFICATE_FOUND = -49

538

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

539

540

# Types

541

class session_int(ctypes.Structure):

542

_fields_ = []

543

session_t = ctypes.POINTER(session_int)

544

545

class certificate_credentials_st(ctypes.Structure):

546

_fields_ = []

547

certificate_credentials_t = ctypes.POINTER(

548

certificate_credentials_st)

549

certificate_type_t = ctypes.c_int

550

551

class datum_t(ctypes.Structure):

552

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

553

('size', ctypes.c_uint)]

554

555

class openpgp_crt_int(ctypes.Structure):

556

_fields_ = []

557

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

558

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

559

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

560

credentials_type_t = ctypes.c_int

561

transport_ptr_t = ctypes.c_void_p

562

close_request_t = ctypes.c_int

563

564

# Exceptions

565

class Error(Exception):

566

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

567

# exception might be raised from within GnuTLS.__init__,

568

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

569

# global variable has happened.

570

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

571

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

572

# code is passed, convert it to a string with

573

# gnutls.strerror()

574

self.code = code

575

if message is None and code is not None:

576

message = GnuTLS.strerror(code)

577

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

578

message, *args)

579

580

class CertificateSecurityError(Error):

581

pass

582

583

# Classes

584

class Credentials(object):

585

def __init__(self):

586

self._c_object = gnutls.certificate_credentials_t()

587

gnutls.certificate_allocate_credentials(

588

ctypes.byref(self._c_object))

589

self.type = gnutls.CRD_CERTIFICATE

590

591

def __del__(self):

592

gnutls.certificate_free_credentials(self._c_object)

593

594

class ClientSession(object):

595

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

596

self._c_object = gnutls.session_t()

597

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

598

gnutls.set_default_priority(self._c_object)

599

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

600

gnutls.handshake_set_private_extensions(self._c_object,

601

True)

602

self.socket = socket

603

if credentials is None:

604

credentials = gnutls.Credentials()

605

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

606

ctypes.cast(credentials._c_object,

607

ctypes.c_void_p))

608

self.credentials = credentials

609

610

def __del__(self):

611

gnutls.deinit(self._c_object)

612

613

def handshake(self):

614

return gnutls.handshake(self._c_object)

615

616

def send(self, data):

617

data = bytes(data)

618

data_len = len(data)

619

while data_len > 0:

620

data_len -= gnutls.record_send(self._c_object,

621

data[-data_len:],

622

data_len)

623

624

def bye(self):

625

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

626

627

# Error handling functions

628

def _error_code(result):

629

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

630

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

631

if result >= 0:

632

return result

633

if result == gnutls.E_NO_CERTIFICATE_FOUND:

634

raise gnutls.CertificateSecurityError(code=result)

635

raise gnutls.Error(code=result)

636

637

def _retry_on_error(result, func, arguments):

638

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

639

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

640

while result < 0:

641

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

642

return _error_code(result)

643

result = func(*arguments)

644

return result

645

646

# Unless otherwise indicated, the function declarations below are

647

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

648

649

# Functions

650

priority_set_direct = _library.gnutls_priority_set_direct

651

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

652

ctypes.POINTER(ctypes.c_char_p)]

653

priority_set_direct.restype = _error_code

654

655

init = _library.gnutls_init

656

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

657

init.restype = _error_code

658

659

set_default_priority = _library.gnutls_set_default_priority

660

set_default_priority.argtypes = [session_t]

661

set_default_priority.restype = _error_code

662

663

record_send = _library.gnutls_record_send

664

record_send.argtypes = [session_t, ctypes.c_void_p,

665

ctypes.c_size_t]

666

record_send.restype = ctypes.c_ssize_t

667

record_send.errcheck = _retry_on_error

668

669

certificate_allocate_credentials = (

670

_library.gnutls_certificate_allocate_credentials)

671

certificate_allocate_credentials.argtypes = [

672

ctypes.POINTER(certificate_credentials_t)]

673

certificate_allocate_credentials.restype = _error_code

674

675

certificate_free_credentials = (

676

_library.gnutls_certificate_free_credentials)

677

certificate_free_credentials.argtypes = [

678

certificate_credentials_t]

679

certificate_free_credentials.restype = None

680

681

handshake_set_private_extensions = (

682

_library.gnutls_handshake_set_private_extensions)

683

handshake_set_private_extensions.argtypes = [session_t,

684

ctypes.c_int]

685

handshake_set_private_extensions.restype = None

686

687

credentials_set = _library.gnutls_credentials_set

688

credentials_set.argtypes = [session_t, credentials_type_t,

689

ctypes.c_void_p]

690

credentials_set.restype = _error_code

691

692

strerror = _library.gnutls_strerror

693

strerror.argtypes = [ctypes.c_int]

694

strerror.restype = ctypes.c_char_p

695

696

certificate_type_get = _library.gnutls_certificate_type_get

697

certificate_type_get.argtypes = [session_t]

698

certificate_type_get.restype = _error_code

699

700

certificate_get_peers = _library.gnutls_certificate_get_peers

701

certificate_get_peers.argtypes = [session_t,

702

ctypes.POINTER(ctypes.c_uint)]

703

certificate_get_peers.restype = ctypes.POINTER(datum_t)

704

705

global_set_log_level = _library.gnutls_global_set_log_level

706

global_set_log_level.argtypes = [ctypes.c_int]

707

global_set_log_level.restype = None

708

709

global_set_log_function = _library.gnutls_global_set_log_function

710

global_set_log_function.argtypes = [log_func]

711

global_set_log_function.restype = None

712

713

deinit = _library.gnutls_deinit

714

deinit.argtypes = [session_t]

715

deinit.restype = None

716

717

handshake = _library.gnutls_handshake

718

handshake.argtypes = [session_t]

719

handshake.restype = _error_code

720

handshake.errcheck = _retry_on_error

721

722

transport_set_ptr = _library.gnutls_transport_set_ptr

723

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

724

transport_set_ptr.restype = None

725

726

bye = _library.gnutls_bye

727

bye.argtypes = [session_t, close_request_t]

728

bye.restype = _error_code

729

bye.errcheck = _retry_on_error

730

731

check_version = _library.gnutls_check_version

732

check_version.argtypes = [ctypes.c_char_p]

733

check_version.restype = ctypes.c_char_p

734

735

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

736

737

openpgp_crt_init = _library.gnutls_openpgp_crt_init

738

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

739

openpgp_crt_init.restype = _error_code

740

741

openpgp_crt_import = _library.gnutls_openpgp_crt_import

742

openpgp_crt_import.argtypes = [openpgp_crt_t,

743

ctypes.POINTER(datum_t),

744

openpgp_crt_fmt_t]

745

openpgp_crt_import.restype = _error_code

746

747

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

748

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

749

ctypes.POINTER(ctypes.c_uint)]

750

openpgp_crt_verify_self.restype = _error_code

751

752

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

753

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

754

openpgp_crt_deinit.restype = None

755

756

openpgp_crt_get_fingerprint = (

757

_library.gnutls_openpgp_crt_get_fingerprint)

758

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

759

ctypes.c_void_p,

760

ctypes.POINTER(

761

ctypes.c_size_t)]

762

openpgp_crt_get_fingerprint.restype = _error_code

763

764

# Remove non-public functions

765

del _error_code, _retry_on_error

766

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

767

gnutls = GnuTLS()

768

769

770

def call_pipe(connection, # : multiprocessing.Connection

771

func, *args, **kwargs):

772

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

773

774

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

775

return value on the provided multiprocessing.Connection.

776

"""

777

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

778

connection.close()

408

779

409

780

410

781

class Client(object):

411

782

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

412

783

413

784

Attributes:

414

785

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

415

786

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

417

788

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

418

789

to see if the client lives.

419

790

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

791

checker_callback_tag: a GLib event source tag, or None

421

792

checker_command: string; External command which is run to check

422

793

if client lives. %() expansions are done at

423

794

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

424

795

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

425

checker_initiator_tag: a gobject event source tag, or None

796

checker_initiator_tag: a GLib event source tag, or None

426

797

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

427

798

client_structure: Object describing what attributes a client has

428

799

and is used for storing the client at exit

429

800

current_checker_command: string; current running checker_command

430

disable_initiator_tag: a gobject event source tag, or None

801

disable_initiator_tag: a GLib event source tag, or None

431

802

enabled: bool()

432

803

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

433

804

uniquely identify the client

438

809

last_checker_status: integer between 0 and 255 reflecting exit

439

810

status of last checker. -1 reflects crashed

440

811

checker, -2 means no checker completed yet.

812

last_checker_signal: The signal which killed the last checker, if

813

last_checker_status is -1

441

814

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

442

815

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

443

816

D-Bus identifiers

450

823

disabled, or None

451

824

server_settings: The server_settings dict from main()

452

825

"""

453

826

454

827

runtime_expansions = ("approval_delay", "approval_duration",

455

828

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

456

829

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

457

830

"last_approval_request", "last_checked_ok",

458

831

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

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

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

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

469

470

def timeout_milliseconds(self):

471

"Return the 'timeout' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.timeout)

473

474

def extended_timeout_milliseconds(self):

475

"Return the 'extended_timeout' attribute in milliseconds"

476

return timedelta_to_milliseconds(self.extended_timeout)

477

478

def interval_milliseconds(self):

479

"Return the 'interval' attribute in milliseconds"

480

return timedelta_to_milliseconds(self.interval)

481

482

def approval_delay_milliseconds(self):

483

return timedelta_to_milliseconds(self.approval_delay)

484

832

client_defaults = {

833

"timeout": "PT5M",

834

"extended_timeout": "PT15M",

835

"interval": "PT2M",

836

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

837

"host": "",

838

"approval_delay": "PT0S",

839

"approval_duration": "PT1S",

840

"approved_by_default": "True",

841

"enabled": "True",

842

}

843

485

844

@staticmethod

486

845

def config_parser(config):

487

846

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

494

853

for client_name in config.sections():

495

854

section = dict(config.items(client_name))

496

855

client = settings[client_name] = {}

497

856

498

857

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

499

858

# Reformat values from string types to Python types

500

859

client["approved_by_default"] = config.getboolean(

501

860

client_name, "approved_by_default")

502

861

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

503

862

"enabled")

504

863

864

# Uppercase and remove spaces from fingerprint for later

865

# comparison purposes with return value from the

866

# fingerprint() function

505

867

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

506

868

.replace(" ", ""))

507

869

if "secret" in section:

508

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

870

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

871

.encode("utf-8"),

872

"base64")

509

873

elif "secfile" in section:

510

874

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

511

875

(section["secfile"])),

512

876

"rb") as secfile:

513

877

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

514

878

else:

515

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

879

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

516

880

.format(section))

517

881

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

518

882

client["extended_timeout"] = string_to_delta(

526

890

client["last_approval_request"] = None

527

891

client["last_checked_ok"] = None

528

892

client["last_checker_status"] = -2

529

893

530

894

return settings

531

532

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

895

896

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

533

897

self.name = name

534

898

if server_settings is None:

535

899

server_settings = {}

536

900

self.server_settings = server_settings

537

901

# adding all client settings

538

for setting, value in settings.iteritems():

902

for setting, value in settings.items():

539

903

setattr(self, setting, value)

540

904

541

905

if self.enabled:

542

906

if not hasattr(self, "last_enabled"):

543

907

self.last_enabled = datetime.datetime.utcnow()

547

911

else:

548

912

self.last_enabled = None

549

913

self.expires = None

550

914

551

915

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

552

# Uppercase and remove spaces from fingerprint for later

553

# comparison purposes with return value from the fingerprint()

554

# function

555

916

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

556

917

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

557

918

datetime.datetime.utcnow())

558

919

559

920

# attributes specific for this server instance

560

921

self.checker = None

561

922

self.checker_initiator_tag = None

564

925

self.current_checker_command = None

565

926

self.approved = None

566

927

self.approvals_pending = 0

567

self.changedstate = (multiprocessing_manager

568

.Condition(multiprocessing_manager

569

.Lock()))

570

self.client_structure = [attr for attr in

571

self.__dict__.iterkeys()

928

self.changedstate = multiprocessing_manager.Condition(

929

multiprocessing_manager.Lock())

930

self.client_structure = [attr

931

for attr in self.__dict__.keys()

572

932

if not attr.startswith("_")]

573

933

self.client_structure.append("client_structure")

574

575

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

576

lambda obj:

577

isinstance(obj,

578

property)):

934

935

for name, t in inspect.getmembers(

936

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

579

937

if not name.startswith("_"):

580

938

self.client_structure.append(name)

581

939

582

940

# Send notice to process children that client state has changed

583

941

def send_changedstate(self):

584

942

with self.changedstate:

585

943

self.changedstate.notify_all()

586

944

587

945

def enable(self):

588

946

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

589

947

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

594

952

self.last_enabled = datetime.datetime.utcnow()

595

953

self.init_checker()

596

954

self.send_changedstate()

597

955

598

956

def disable(self, quiet=True):

599

957

"""Disable this client."""

600

958

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

602

960

if not quiet:

603

961

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

604

962

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

605

gobject.source_remove(self.disable_initiator_tag)

963

GLib.source_remove(self.disable_initiator_tag)

606

964

self.disable_initiator_tag = None

607

965

self.expires = None

608

966

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

609

gobject.source_remove(self.checker_initiator_tag)

967

GLib.source_remove(self.checker_initiator_tag)

610

968

self.checker_initiator_tag = None

611

969

self.stop_checker()

612

970

self.enabled = False

613

971

if not quiet:

614

972

self.send_changedstate()

615

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

973

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

616

974

return False

617

975

618

976

def __del__(self):

619

977

self.disable()

620

978

621

979

def init_checker(self):

622

980

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

623

981

# and every interval from then on.

624

982

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

self.checker_initiator_tag = (gobject.timeout_add

627

(self.interval_milliseconds(),

628

self.start_checker))

983

GLib.source_remove(self.checker_initiator_tag)

984

self.checker_initiator_tag = GLib.timeout_add(

985

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

986

self.start_checker)

629

987

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

630

988

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

self.disable_initiator_tag = (gobject.timeout_add

633

(self.timeout_milliseconds(),

634

self.disable))

989

GLib.source_remove(self.disable_initiator_tag)

990

self.disable_initiator_tag = GLib.timeout_add(

991

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

635

992

# Also start a new checker *right now*.

636

993

self.start_checker()

637

638

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

994

995

def checker_callback(self, source, condition, connection,

996

command):

639

997

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

640

998

self.checker_callback_tag = None

641

999

self.checker = None

642

if os.WIFEXITED(condition):

643

self.last_checker_status = os.WEXITSTATUS(condition)

1000

# Read return code from connection (see call_pipe)

1001

returncode = connection.recv()

1002

connection.close()

1003

1004

if returncode >= 0:

1005

self.last_checker_status = returncode

1006

self.last_checker_signal = None

644

1007

if self.last_checker_status == 0:

645

1008

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

646

1009

vars(self))

647

1010

self.checked_ok()

648

1011

else:

649

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

650

vars(self))

1012

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

651

1013

else:

652

1014

self.last_checker_status = -1

1015

self.last_checker_signal = -returncode

653

1016

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

654

1017

vars(self))

655

1018

return False

1019

656

1020

def checked_ok(self):

657

1021

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

658

1022

self.last_checked_ok = datetime.datetime.utcnow()

659

1023

self.last_checker_status = 0

1024

self.last_checker_signal = None

660

1025

self.bump_timeout()

661

1026

662

1027

def bump_timeout(self, timeout=None):

663

1028

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

664

1029

if timeout is None:

665

1030

timeout = self.timeout

666

1031

if self.disable_initiator_tag is not None:

667

gobject.source_remove(self.disable_initiator_tag)

1032

GLib.source_remove(self.disable_initiator_tag)

668

1033

self.disable_initiator_tag = None

669

1034

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

1035

self.disable_initiator_tag = GLib.timeout_add(

1036

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

673

1037

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

674

1038

675

1039

def need_approval(self):

676

1040

self.last_approval_request = datetime.datetime.utcnow()

677

1041

678

1042

def start_checker(self):

679

1043

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

680

1044

681

1045

If a checker already exists, leave it running and do

682

1046

nothing."""

683

1047

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

688

1052

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

689

1053

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

690

1054

# should be.

691

692

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

693

try:

694

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

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

700

else:

701

if pid:

702

logger.warning("Checker was a zombie")

703

gobject.source_remove(self.checker_callback_tag)

704

self.checker_callback(pid, status,

705

self.current_checker_command)

1055

1056

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

1057

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

1058

self.checker.join()

1059

self.checker = None

706

1060

# Start a new checker if needed

707

1061

if self.checker is None:

708

1062

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

1063

escaped_attrs = {

1064

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

1065

for attr in self.runtime_expansions}

713

1066

try:

714

1067

command = self.checker_command % escaped_attrs

715

1068

except TypeError as error:

716

1069

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

1070

self.checker_command,

1071

exc_info=error)

1072

return True # Try again later

719

1073

self.current_checker_command = command

720

try:

721

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

722

command, self.name)

723

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

724

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

725

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

726

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

735

self.checker = subprocess.Popen(command,

736

close_fds=True,

737

shell=True, cwd="/",

738

**popen_args)

739

except OSError as error:

740

logger.error("Failed to start subprocess",

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

750

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

751

except OSError as error:

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

761

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

1074

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

1075

self.name)

1076

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

1077

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

1078

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

1079

# always replaced by /dev/null.)

1080

# The exception is when not debugging but nevertheless

1081

# running in the foreground; use the previously

1082

# created wnull.

1083

popen_args = {"close_fds": True,

1084

"shell": True,

1085

"cwd": "/"}

1086

if (not self.server_settings["debug"]

1087

and self.server_settings["foreground"]):

1088

popen_args.update({"stdout": wnull,

1089

"stderr": wnull})

1090

pipe = multiprocessing.Pipe(duplex=False)

1091

self.checker = multiprocessing.Process(

1092

target=call_pipe,

1093

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

1094

kwargs=popen_args)

1095

self.checker.start()

1096

self.checker_callback_tag = GLib.io_add_watch(

1097

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

1098

self.checker_callback, pipe[0], command)

1099

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

762

1100

return True

763

1101

764

1102

def stop_checker(self):

765

1103

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

766

1104

if self.checker_callback_tag:

767

gobject.source_remove(self.checker_callback_tag)

1105

GLib.source_remove(self.checker_callback_tag)

768

1106

self.checker_callback_tag = None

769

1107

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

770

1108

return

771

1109

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

772

try:

773

self.checker.terminate()

774

#time.sleep(0.5)

775

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

776

# self.checker.kill()

777

except OSError as error:

778

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

779

raise

1110

self.checker.terminate()

780

1111

self.checker = None

781

1112

782

1113

783

def dbus_service_property(dbus_interface, signature="v",

784

access="readwrite", byte_arrays=False):

1114

def dbus_service_property(dbus_interface,

1115

signature="v",

1116

access="readwrite",

1117

byte_arrays=False):

785

1118

"""Decorators for marking methods of a DBusObjectWithProperties to

786

1119

become properties on the D-Bus.

787

1120

788

1121

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

789

1122

and with one argument by "Set".

790

1123

791

1124

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

792

1125

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

793

1126

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

796

1129

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

797

1130

if byte_arrays and signature != "ay":

798

1131

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

799

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

1132

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

1133

800

1134

def decorator(func):

801

1135

func._dbus_is_property = True

802

1136

func._dbus_interface = dbus_interface

805

1139

func._dbus_name = func.__name__

806

1140

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

807

1141

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

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1142

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

809

1143

return func

1144

810

1145

return decorator

811

1146

812

1147

813

1148

def dbus_interface_annotations(dbus_interface):

814

1149

"""Decorator for marking functions returning interface annotations

815

1150

816

1151

Usage:

817

1152

818

1153

@dbus_interface_annotations("org.example.Interface")

819

1154

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

820

1155

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

821

1156

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

822

1157

"false"}

823

1158

"""

1159

824

1160

def decorator(func):

825

1161

func._dbus_is_interface = True

826

1162

func._dbus_interface = dbus_interface

827

1163

func._dbus_name = dbus_interface

828

1164

return func

1165

829

1166

return decorator

830

1167

831

1168

832

1169

def dbus_annotations(annotations):

833

1170

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

834

1171

Usage:

835

1172

1173

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

1174

"org.freedesktop.DBus.Property."

1175

"EmitsChangedSignal": "false"})

836

1176

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

837

1177

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

1178

def Property_dbus_property(self):

842

1179

return dbus.Boolean(False)

1180

1181

See also the DBusObjectWithAnnotations class.

843

1182

"""

1183

844

1184

def decorator(func):

845

1185

func._dbus_annotations = annotations

846

1186

return func

1187

847

1188

return decorator

848

1189

849

1190

850

1191

class DBusPropertyException(dbus.exceptions.DBusException):

851

1192

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

852

1193

"""

853

def __unicode__(self):

854

return unicode(str(self))

1194

pass

855

1195

856

1196

857

1197

class DBusPropertyAccessException(DBusPropertyException):

866

1206

pass

867

1207

868

1208

869

class DBusObjectWithProperties(dbus.service.Object):

870

"""A D-Bus object with properties.

871

872

Classes inheriting from this can use the dbus_service_property

873

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

874

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

1209

class DBusObjectWithAnnotations(dbus.service.Object):

1210

"""A D-Bus object with annotations.

1211

1212

Classes inheriting from this can use the dbus_annotations

1213

decorator to add annotations to methods or signals.

875

1214

"""

876

1215

877

1216

@staticmethod

878

1217

def _is_dbus_thing(thing):

879

1218

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

880

1219

881

1220

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

882

1221

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

883

1222

"""

884

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

1223

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

885

1224

False)

886

1225

887

1226

def _get_all_dbus_things(self, thing):

888

1227

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

889

1228

"""

890

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

891

name),

1229

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

892

1230

athing.__get__(self))

893

1231

for cls in self.__class__.__mro__

894

1232

for name, athing in

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

897

1233

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

1234

1235

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1236

out_signature="s",

1237

path_keyword='object_path',

1238

connection_keyword='connection')

1239

def Introspect(self, object_path, connection):

1240

"""Overloading of standard D-Bus method.

1241

1242

Inserts annotation tags on methods and signals.

1243

"""

1244

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

1245

connection)

1246

try:

1247

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

1248

1249

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

1250

# Add annotation tags

1251

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

1252

for tag in if_tag.getElementsByTagName(typ):

1253

annots = dict()

1254

for name, prop in (self.

1255

_get_all_dbus_things(typ)):

1256

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

1257

and prop._dbus_interface

1258

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

1259

annots.update(getattr(

1260

prop, "_dbus_annotations", {}))

1261

for name, value in annots.items():

1262

ann_tag = document.createElement(

1263

"annotation")

1264

ann_tag.setAttribute("name", name)

1265

ann_tag.setAttribute("value", value)

1266

tag.appendChild(ann_tag)

1267

# Add interface annotation tags

1268

for annotation, value in dict(

1269

itertools.chain.from_iterable(

1270

annotations().items()

1271

for name, annotations

1272

in self._get_all_dbus_things("interface")

1273

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

1274

)).items():

1275

ann_tag = document.createElement("annotation")

1276

ann_tag.setAttribute("name", annotation)

1277

ann_tag.setAttribute("value", value)

1278

if_tag.appendChild(ann_tag)

1279

# Fix argument name for the Introspect method itself

1280

if (if_tag.getAttribute("name")

1281

== dbus.INTROSPECTABLE_IFACE):

1282

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

1283

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

1284

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

1285

if (arg.getAttribute("direction")

1286

== "out"):

1287

arg.setAttribute("name",

1288

"xml_data")

1289

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

1290

document.unlink()

1291

except (AttributeError, xml.dom.DOMException,

1292

xml.parsers.expat.ExpatError) as error:

1293

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

1294

exc_info=error)

1295

return xmlstring

1296

1297

1298

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1299

"""A D-Bus object with properties.

1300

1301

Classes inheriting from this can use the dbus_service_property

1302

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

1303

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

1304

"""

1305

898

1306

def _get_dbus_property(self, interface_name, property_name):

899

1307

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

900

1308

property with the specified name and interface.

901

1309

"""

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

1310

for cls in self.__class__.__mro__:

1311

for name, value in inspect.getmembers(

1312

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

906

1313

if (value._dbus_name == property_name

907

1314

and value._dbus_interface == interface_name):

908

1315

return value.__get__(self)

909

1316

910

1317

# No such property

911

raise DBusPropertyNotFound(self.dbus_object_path + ":"

912

+ interface_name + "."

913

+ property_name)

914

915

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

1318

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

1319

self.dbus_object_path, interface_name, property_name))

1320

1321

@classmethod

1322

def _get_all_interface_names(cls):

1323

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

1324

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

1325

"_dbus_interface", None)

1326

for x in (inspect.getmro(cls))

1327

for attr in dir(x))

1328

if name is not None)

1329

1330

@dbus.service.method(dbus.PROPERTIES_IFACE,

1331

in_signature="ss",

916

1332

out_signature="v")

917

1333

def Get(self, interface_name, property_name):

918

1334

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

924

1340

if not hasattr(value, "variant_level"):

925

1341

return value

926

1342

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

927

1343

928

1344

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

929

1345

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

930

1346

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

937

1353

# signatures other than "ay".

938

1354

if prop._dbus_signature != "ay":

939

1355

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

940

"'ay' signature {0!r}"

1356

"'ay' signature {!r}"

941

1357

.format(prop._dbus_signature))

942

1358

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

943

1359

for byte in value))

944

1360

prop(value)

945

946

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

1361

1362

@dbus.service.method(dbus.PROPERTIES_IFACE,

1363

in_signature="s",

947

1364

out_signature="a{sv}")

948

1365

def GetAll(self, interface_name):

949

1366

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

950

1367

standard.

951

1368

952

1369

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

953

1370

"""

954

1371

properties = {}

964

1381

if not hasattr(value, "variant_level"):

965

1382

properties[name] = value

966

1383

continue

967

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

968

value.variant_level+1)

1384

properties[name] = type(value)(

1385

value, variant_level=value.variant_level + 1)

969

1386

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

970

1387

1388

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

1389

def PropertiesChanged(self, interface_name, changed_properties,

1390

invalidated_properties):

1391

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

1392

standard.

1393

"""

1394

pass

1395

971

1396

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

972

1397

out_signature="s",

973

1398

path_keyword='object_path',

974

1399

connection_keyword='connection')

975

1400

def Introspect(self, object_path, connection):

976

1401

"""Overloading of standard D-Bus method.

977

1402

978

1403

Inserts property tags and interface annotation tags.

979

1404

"""

980

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

981

connection)

1405

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1406

object_path,

1407

connection)

982

1408

try:

983

1409

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

1410

984

1411

def make_tag(document, name, prop):

985

1412

e = document.createElement("property")

986

1413

e.setAttribute("name", name)

987

1414

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

988

1415

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

989

1416

return e

1417

990

1418

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

991

1419

# Add property tags

992

1420

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

995

1423

if prop._dbus_interface

996

1424

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

997

1425

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr

1008

(prop,

1009

"_dbus_annotations",

1010

{}))

1011

for name, value in annots.iteritems():

1012

ann_tag = document.createElement(

1013

"annotation")

1014

ann_tag.setAttribute("name", name)

1015

ann_tag.setAttribute("value", value)

1016

tag.appendChild(ann_tag)

1017

# Add interface annotation tags

1018

for annotation, value in dict(

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

1025

ann_tag = document.createElement("annotation")

1026

ann_tag.setAttribute("name", annotation)

1027

ann_tag.setAttribute("value", value)

1028

if_tag.appendChild(ann_tag)

1426

# Add annotation tags for properties

1427

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

1428

annots = dict()

1429

for name, prop in self._get_all_dbus_things(

1430

"property"):

1431

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

1432

and prop._dbus_interface

1433

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

1434

annots.update(getattr(

1435

prop, "_dbus_annotations", {}))

1436

for name, value in annots.items():

1437

ann_tag = document.createElement(

1438

"annotation")

1439

ann_tag.setAttribute("name", name)

1440

ann_tag.setAttribute("value", value)

1441

tag.appendChild(ann_tag)

1029

1442

# Add the names to the return values for the

1030

1443

# "org.freedesktop.DBus.Properties" methods

1031

1444

if (if_tag.getAttribute("name")

1050

1463

return xmlstring

1051

1464

1052

1465

1466

try:

1467

dbus.OBJECT_MANAGER_IFACE

1468

except AttributeError:

1469

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

1470

1471

1472

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1473

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

1474

1475

Classes inheriting from this exposes the standard

1476

GetManagedObjects call and the InterfacesAdded and

1477

InterfacesRemoved signals on the standard

1478

"org.freedesktop.DBus.ObjectManager" interface.

1479

1480

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

1481

manually.

1482

"""

1483

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1484

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

1485

def GetManagedObjects(self):

1486

"""This function must be overridden"""

1487

raise NotImplementedError()

1488

1489

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1490

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

1491

def InterfacesAdded(self, object_path, interfaces_and_properties):

1492

pass

1493

1494

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

1495

def InterfacesRemoved(self, object_path, interfaces):

1496

pass

1497

1498

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1499

out_signature="s",

1500

path_keyword='object_path',

1501

connection_keyword='connection')

1502

def Introspect(self, object_path, connection):

1503

"""Overloading of standard D-Bus method.

1504

1505

Override return argument name of GetManagedObjects to be

1506

"objpath_interfaces_and_properties"

1507

"""

1508

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1509

object_path,

1510

connection)

1511

try:

1512

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

1513

1514

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

1515

# Fix argument name for the GetManagedObjects method

1516

if (if_tag.getAttribute("name")

1517

== dbus.OBJECT_MANAGER_IFACE):

1518

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

1519

if (cn.getAttribute("name")

1520

== "GetManagedObjects"):

1521

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

1522

if (arg.getAttribute("direction")

1523

== "out"):

1524

arg.setAttribute(

1525

"name",

1526

"objpath_interfaces"

1527

"_and_properties")

1528

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

1529

document.unlink()

1530

except (AttributeError, xml.dom.DOMException,

1531

xml.parsers.expat.ExpatError) as error:

1532

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

1533

exc_info=error)

1534

return xmlstring

1535

1536

1053

1537

def datetime_to_dbus(dt, variant_level=0):

1054

1538

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

1055

1539

if dt is None:

1056

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

1057

return dbus.String(dt.isoformat(),

1058

variant_level=variant_level)

1540

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

1541

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

1059

1542

1060

1543

1061

1544

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1063

1546

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

1064

1547

interface names according to the "alt_interface_names" mapping.

1065

1548

Usage:

1066

1549

1067

1550

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

1068

1551

"net.example.AlternateInterface"})

1069

1552

class SampleDBusObject(dbus.service.Object):

1070

1553

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

1071

1554

def SampleDBusMethod():

1072

1555

pass

1073

1556

1074

1557

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

1558

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

1076

1559

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

1077

1560

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

1078

1561

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

1079

1562

1080

1563

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

1081

1564

(from DBusObjectWithProperties) and interfaces (from the

1082

1565

dbus_interface_annotations decorator).

1083

1566

"""

1567

1084

1568

def wrapper(cls):

1085

1569

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1570

alt_interface_names.items()):

1087

1571

attr = {}

1088

1572

interface_names = set()

1089

1573

# Go though all attributes of the class

1091

1575

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

1092

1576

# with the wrong interface name

1093

1577

if (not hasattr(attribute, "_dbus_interface")

1094

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

1578

or not attribute._dbus_interface.startswith(

1579

orig_interface_name)):

1096

1580

continue

1097

1581

# Create an alternate D-Bus interface name based on

1098

1582

# the current name

1099

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1583

alt_interface = attribute._dbus_interface.replace(

1584

orig_interface_name, alt_interface_name)

1102

1585

interface_names.add(alt_interface)

1103

1586

# Is this a D-Bus signal?

1104

1587

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

1105

1588

# Extract the original non-method undecorated

1106

1589

# function by black magic

1107

nonmethod_func = (dict(

1590

if sys.version_info.major == 2:

1591

nonmethod_func = (dict(

1108

1592

zip(attribute.func_code.co_freevars,

1109

attribute.__closure__))["func"]

1110

.cell_contents)

1593

attribute.__closure__))

1594

["func"].cell_contents)

1595

else:

1596

nonmethod_func = (dict(

1597

zip(attribute.__code__.co_freevars,

1598

attribute.__closure__))

1599

["func"].cell_contents)

1111

1600

# Create a new, but exactly alike, function

1112

1601

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

1113

1602

# with the alternate D-Bus interface name

1114

new_function = (dbus.service.signal

1115

(alt_interface,

1116

attribute._dbus_signature)

1117

(types.FunctionType(

1118

nonmethod_func.func_code,

1119

nonmethod_func.func_globals,

1120

nonmethod_func.func_name,

1121

nonmethod_func.func_defaults,

1122

nonmethod_func.func_closure)))

1603

new_function = copy_function(nonmethod_func)

1604

new_function = (dbus.service.signal(

1605

alt_interface,

1606

attribute._dbus_signature)(new_function))

1123

1607

# Copy annotations, if any

1124

1608

try:

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1609

new_function._dbus_annotations = dict(

1610

attribute._dbus_annotations)

1127

1611

except AttributeError:

1128

1612

pass

1613

1129

1614

# Define a creator of a function to call both the

1130

1615

# original and alternate functions, so both the

1131

1616

# original and alternate signals gets sent when

1134

1619

"""This function is a scope container to pass

1135

1620

func1 and func2 to the "call_both" function

1136

1621

outside of its arguments"""

1622

1623

@functools.wraps(func2)

1137

1624

def call_both(*args, **kwargs):

1138

1625

"""This function will emit two D-Bus

1139

1626

signals by calling func1 and func2"""

1140

1627

func1(*args, **kwargs)

1141

1628

func2(*args, **kwargs)

1629

# Make wrapper function look like a D-Bus

1630

# signal

1631

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

1632

if name.startswith("_dbus_"):

1633

setattr(call_both, name, attr)

1634

1142

1635

return call_both

1143

1636

# Create the "call_both" function and add it to

1144

1637

# the class

1149

1642

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

1150

1643

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

1151

1644

# to the class.

1152

attr[attrname] = (dbus.service.method

1153

(alt_interface,

1154

attribute._dbus_in_signature,

1155

attribute._dbus_out_signature)

1156

(types.FunctionType

1157

(attribute.func_code,

1158

attribute.func_globals,

1159

attribute.func_name,

1160

attribute.func_defaults,

1161

attribute.func_closure)))

1645

attr[attrname] = (

1646

dbus.service.method(

1647

alt_interface,

1648

attribute._dbus_in_signature,

1649

attribute._dbus_out_signature)

1650

(copy_function(attribute)))

1162

1651

# Copy annotations, if any

1163

1652

try:

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1653

attr[attrname]._dbus_annotations = dict(

1654

attribute._dbus_annotations)

1166

1655

except AttributeError:

1167

1656

pass

1168

1657

# Is this a D-Bus property?

1171

1660

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

1172

1661

# property with the alternate D-Bus interface

1173

1662

# name. Add it to the class.

1174

attr[attrname] = (dbus_service_property

1175

(alt_interface,

1176

attribute._dbus_signature,

1177

attribute._dbus_access,

1178

attribute

1179

._dbus_get_args_options

1180

["byte_arrays"])

1181

(types.FunctionType

1182

(attribute.func_code,

1183

attribute.func_globals,

1184

attribute.func_name,

1185

attribute.func_defaults,

1186

attribute.func_closure)))

1663

attr[attrname] = (dbus_service_property(

1664

alt_interface, attribute._dbus_signature,

1665

attribute._dbus_access,

1666

attribute._dbus_get_args_options

1667

["byte_arrays"])

1668

(copy_function(attribute)))

1187

1669

# Copy annotations, if any

1188

1670

try:

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1671

attr[attrname]._dbus_annotations = dict(

1672

attribute._dbus_annotations)

1191

1673

except AttributeError:

1192

1674

pass

1193

1675

# Is this a D-Bus interface?

1196

1678

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

1197

1679

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

1198

1680

# to the class.

1199

attr[attrname] = (dbus_interface_annotations

1200

(alt_interface)

1201

(types.FunctionType

1202

(attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1681

attr[attrname] = (

1682

dbus_interface_annotations(alt_interface)

1683

(copy_function(attribute)))

1207

1684

if deprecate:

1208

1685

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1686

iname = "_AlternateDBusNames_interface_annotation{}"

1210

1687

for interface_name in interface_names:

1688

1211

1689

@dbus_interface_annotations(interface_name)

1212

1690

def func(self):

1213

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

1214

"true" }

1691

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

1692

"true"}

1215

1693

# Find an unused name

1216

1694

for aname in (iname.format(i)

1217

1695

for i in itertools.count()):

1221

1699

if interface_names:

1222

1700

# Replace the class with a new subclass of it with

1223

1701

# methods, signals, etc. as created above.

1224

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

1225

(cls,), attr)

1702

if sys.version_info.major == 2:

1703

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

1704

(cls, ), attr)

1705

else:

1706

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

1707

(cls, ), attr)

1226

1708

return cls

1709

1227

1710

return wrapper

1228

1711

1229

1712

1230

1713

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

1231

"se.bsnet.fukt.Mandos"})

1714

"se.bsnet.fukt.Mandos"})

1232

1715

class ClientDBus(Client, DBusObjectWithProperties):

1233

1716

"""A Client class using D-Bus

1234

1717

1235

1718

Attributes:

1236

1719

dbus_object_path: dbus.ObjectPath

1237

1720

bus: dbus.SystemBus()

1238

1721

"""

1239

1722

1240

1723

runtime_expansions = (Client.runtime_expansions

1241

+ ("dbus_object_path",))

1242

1724

+ ("dbus_object_path", ))

1725

1726

_interface = "se.recompile.Mandos.Client"

1727

1243

1728

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

1244

1245

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

1729

1730

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

1246

1731

self.bus = bus

1247

1732

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

1248

1733

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

1249

1734

# the D-Bus

1250

client_object_name = unicode(self.name).translate(

1735

client_object_name = str(self.name).translate(

1251

1736

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

1252

1737

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

1253

self.dbus_object_path = (dbus.ObjectPath

1254

("/clients/" + client_object_name))

1738

self.dbus_object_path = dbus.ObjectPath(

1739

"/clients/" + client_object_name)

1255

1740

DBusObjectWithProperties.__init__(self, self.bus,

1256

1741

self.dbus_object_path)

1257

1258

def notifychangeproperty(transform_func,

1259

dbus_name, type_func=lambda x: x,

1260

variant_level=1):

1742

1743

def notifychangeproperty(transform_func, dbus_name,

1744

type_func=lambda x: x,

1745

variant_level=1,

1746

invalidate_only=False,

1747

_interface=_interface):

1261

1748

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

1262

1749

its changes to DBus.

1263

1750

1264

1751

transform_fun: Function that takes a value and a variant_level

1265

1752

and transforms it to a D-Bus type.

1266

1753

dbus_name: D-Bus name of the variable

1268

1755

to the D-Bus. Default: no transform

1269

1756

variant_level: D-Bus variant level. Default: 1

1270

1757

"""

1271

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

1758

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

1759

1272

1760

def setter(self, value):

1273

1761

if hasattr(self, "dbus_object_path"):

1274

1762

if (not hasattr(self, attrname) or

1275

1763

type_func(getattr(self, attrname, None))

1276

1764

!= type_func(value)):

1277

dbus_value = transform_func(type_func(value),

1278

variant_level

1279

=variant_level)

1280

self.PropertyChanged(dbus.String(dbus_name),

1281

dbus_value)

1765

if invalidate_only:

1766

self.PropertiesChanged(

1767

_interface, dbus.Dictionary(),

1768

dbus.Array((dbus_name, )))

1769

else:

1770

dbus_value = transform_func(

1771

type_func(value),

1772

variant_level=variant_level)

1773

self.PropertyChanged(dbus.String(dbus_name),

1774

dbus_value)

1775

self.PropertiesChanged(

1776

_interface,

1777

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

1778

dbus_value}),

1779

dbus.Array())

1282

1780

setattr(self, attrname, value)

1283

1781

1284

1782

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

1285

1783

1286

1784

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1287

1785

approvals_pending = notifychangeproperty(dbus.Boolean,

1288

1786

"ApprovalPending",

1289

type_func = bool)

1787

type_func=bool)

1290

1788

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

1291

1789

last_enabled = notifychangeproperty(datetime_to_dbus,

1292

1790

"LastEnabled")

1293

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

1294

type_func = lambda checker:

1295

checker is not None)

1791

checker = notifychangeproperty(

1792

dbus.Boolean, "CheckerRunning",

1793

type_func=lambda checker: checker is not None)

1296

1794

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1297

1795

"LastCheckedOK")

1298

1796

last_checker_status = notifychangeproperty(dbus.Int16,

1301

1799

datetime_to_dbus, "LastApprovalRequest")

1302

1800

approved_by_default = notifychangeproperty(dbus.Boolean,

1303

1801

"ApprovedByDefault")

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1305

"ApprovalDelay",

1306

type_func =

1307

timedelta_to_milliseconds)

1802

approval_delay = notifychangeproperty(

1803

dbus.UInt64, "ApprovalDelay",

1804

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

1308

1805

approval_duration = notifychangeproperty(

1309

1806

dbus.UInt64, "ApprovalDuration",

1310

type_func = timedelta_to_milliseconds)

1807

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

1311

1808

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

1312

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

1313

type_func =

1314

timedelta_to_milliseconds)

1809

timeout = notifychangeproperty(

1810

dbus.UInt64, "Timeout",

1811

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

1315

1812

extended_timeout = notifychangeproperty(

1316

1813

dbus.UInt64, "ExtendedTimeout",

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

timedelta_to_milliseconds)

1814

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

1815

interval = notifychangeproperty(

1816

dbus.UInt64, "Interval",

1817

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

1322

1818

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

1323

1819

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

1820

invalidate_only=True)

1821

1324

1822

del notifychangeproperty

1325

1823

1326

1824

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

1327

1825

try:

1328

1826

self.remove_from_connection()

1331

1829

if hasattr(DBusObjectWithProperties, "__del__"):

1332

1830

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

1333

1831

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

1334

1335

def checker_callback(self, pid, condition, command,

1336

*args, **kwargs):

1337

self.checker_callback_tag = None

1338

self.checker = None

1339

if os.WIFEXITED(condition):

1340

exitstatus = os.WEXITSTATUS(condition)

1832

1833

def checker_callback(self, source, condition,

1834

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

1835

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

1836

connection, command, *args,

1837

**kwargs)

1838

exitstatus = self.last_checker_status

1839

if exitstatus >= 0:

1341

1840

# Emit D-Bus signal

1342

1841

self.CheckerCompleted(dbus.Int16(exitstatus),

1343

dbus.Int64(condition),

1842

# This is specific to GNU libC

1843

dbus.Int64(exitstatus << 8),

1344

1844

dbus.String(command))

1345

1845

else:

1346

1846

# Emit D-Bus signal

1347

1847

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

1348

dbus.Int64(condition),

1848

dbus.Int64(

1849

# This is specific to GNU libC

1850

(exitstatus << 8)

1851

| self.last_checker_signal),

1349

1852

dbus.String(command))

1350

1351

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

1352

*args, **kwargs)

1353

1853

return ret

1854

1354

1855

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

1355

1856

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

1356

1857

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

1360

1861

# Emit D-Bus signal

1361

1862

self.CheckerStarted(self.current_checker_command)

1362

1863

return r

1363

1864

1364

1865

def _reset_approved(self):

1365

1866

self.approved = None

1366

1867

return False

1367

1868

1368

1869

def approve(self, value=True):

1369

1870

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1871

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

1872

* 1000), self._reset_approved)

1373

1873

self.send_changedstate()

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1874

1875

# D-Bus methods, signals & properties

1876

1877

# Interfaces

1878

1879

# Signals

1880

1387

1881

# CheckerCompleted - signal

1388

1882

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

1389

1883

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

1390

1884

"D-Bus signal"

1391

1885

pass

1392

1886

1393

1887

# CheckerStarted - signal

1394

1888

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

1395

1889

def CheckerStarted(self, command):

1396

1890

"D-Bus signal"

1397

1891

pass

1398

1892

1399

1893

# PropertyChanged - signal

1894

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

1400

1895

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

1401

1896

def PropertyChanged(self, property, value):

1402

1897

"D-Bus signal"

1403

1898

pass

1404

1899

1405

1900

# GotSecret - signal

1406

1901

@dbus.service.signal(_interface)

1407

1902

def GotSecret(self):

1410

1905

server to mandos-client

1411

1906

"""

1412

1907

pass

1413

1908

1414

1909

# Rejected - signal

1415

1910

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

1416

1911

def Rejected(self, reason):

1417

1912

"D-Bus signal"

1418

1913

pass

1419

1914

1420

1915

# NeedApproval - signal

1421

1916

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

1422

1917

def NeedApproval(self, timeout, default):

1423

1918

"D-Bus signal"

1424

1919

return self.need_approval()

1425

1426

## Methods

1427

1920

1921

# Methods

1922

1428

1923

# Approve - method

1429

1924

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

1430

1925

def Approve(self, value):

1431

1926

self.approve(value)

1432

1927

1433

1928

# CheckedOK - method

1434

1929

@dbus.service.method(_interface)

1435

1930

def CheckedOK(self):

1436

1931

self.checked_ok()

1437

1932

1438

1933

# Enable - method

1934

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

1439

1935

@dbus.service.method(_interface)

1440

1936

def Enable(self):

1441

1937

"D-Bus method"

1442

1938

self.enable()

1443

1939

1444

1940

# StartChecker - method

1941

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

1445

1942

@dbus.service.method(_interface)

1446

1943

def StartChecker(self):

1447

1944

"D-Bus method"

1448

1945

self.start_checker()

1449

1946

1450

1947

# Disable - method

1948

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

1451

1949

@dbus.service.method(_interface)

1452

1950

def Disable(self):

1453

1951

"D-Bus method"

1454

1952

self.disable()

1455

1953

1456

1954

# StopChecker - method

1955

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

1457

1956

@dbus.service.method(_interface)

1458

1957

def StopChecker(self):

1459

1958

self.stop_checker()

1460

1461

## Properties

1462

1959

1960

# Properties

1961

1463

1962

# ApprovalPending - property

1464

1963

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

1465

1964

def ApprovalPending_dbus_property(self):

1466

1965

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

1467

1966

1468

1967

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

1968

@dbus_service_property(_interface,

1969

signature="b",

1470

1970

access="readwrite")

1471

1971

def ApprovedByDefault_dbus_property(self, value=None):

1472

1972

if value is None: # get

1473

1973

return dbus.Boolean(self.approved_by_default)

1474

1974

self.approved_by_default = bool(value)

1475

1975

1476

1976

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

1977

@dbus_service_property(_interface,

1978

signature="t",

1478

1979

access="readwrite")

1479

1980

def ApprovalDelay_dbus_property(self, value=None):

1480

1981

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1982

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

1983

* 1000)

1482

1984

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

1483

1985

1484

1986

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

1987

@dbus_service_property(_interface,

1988

signature="t",

1486

1989

access="readwrite")

1487

1990

def ApprovalDuration_dbus_property(self, value=None):

1488

1991

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1992

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

1993

* 1000)

1491

1994

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

1492

1995

1493

1996

# Name - property

1997

@dbus_annotations(

1998

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

1494

1999

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

1495

2000

def Name_dbus_property(self):

1496

2001

return dbus.String(self.name)

1497

2002

1498

2003

# Fingerprint - property

2004

@dbus_annotations(

2005

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

1499

2006

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

1500

2007

def Fingerprint_dbus_property(self):

1501

2008

return dbus.String(self.fingerprint)

1502

2009

1503

2010

# Host - property

1504

@dbus_service_property(_interface, signature="s",

2011

@dbus_service_property(_interface,

2012

signature="s",

1505

2013

access="readwrite")

1506

2014

def Host_dbus_property(self, value=None):

1507

2015

if value is None: # get

1508

2016

return dbus.String(self.host)

1509

self.host = unicode(value)

1510

2017

self.host = str(value)

2018

1511

2019

# Created - property

2020

@dbus_annotations(

2021

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

1512

2022

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

1513

2023

def Created_dbus_property(self):

1514

2024

return datetime_to_dbus(self.created)

1515

2025

1516

2026

# LastEnabled - property

1517

2027

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

1518

2028

def LastEnabled_dbus_property(self):

1519

2029

return datetime_to_dbus(self.last_enabled)

1520

2030

1521

2031

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

2032

@dbus_service_property(_interface,

2033

signature="b",

1523

2034

access="readwrite")

1524

2035

def Enabled_dbus_property(self, value=None):

1525

2036

if value is None: # get

1528

2039

self.enable()

1529

2040

else:

1530

2041

self.disable()

1531

2042

1532

2043

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2044

@dbus_service_property(_interface,

2045

signature="s",

1534

2046

access="readwrite")

1535

2047

def LastCheckedOK_dbus_property(self, value=None):

1536

2048

if value is not None:

1537

2049

self.checked_ok()

1538

2050

return

1539

2051

return datetime_to_dbus(self.last_checked_ok)

1540

2052

1541

2053

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2054

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

1544

2055

def LastCheckerStatus_dbus_property(self):

1545

2056

return dbus.Int16(self.last_checker_status)

1546

2057

1547

2058

# Expires - property

1548

2059

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

1549

2060

def Expires_dbus_property(self):

1550

2061

return datetime_to_dbus(self.expires)

1551

2062

1552

2063

# LastApprovalRequest - property

1553

2064

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

1554

2065

def LastApprovalRequest_dbus_property(self):

1555

2066

return datetime_to_dbus(self.last_approval_request)

1556

2067

1557

2068

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2069

@dbus_service_property(_interface,

2070

signature="t",

1559

2071

access="readwrite")

1560

2072

def Timeout_dbus_property(self, value=None):

1561

2073

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2074

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

1563

2075

old_timeout = self.timeout

1564

2076

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

1565

2077

# Reschedule disabling

1573

2085

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

1574

2086

is None):

1575

2087

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

2088

GLib.source_remove(self.disable_initiator_tag)

2089

self.disable_initiator_tag = GLib.timeout_add(

2090

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

2091

self.disable)

2092

1582

2093

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2094

@dbus_service_property(_interface,

2095

signature="t",

1584

2096

access="readwrite")

1585

2097

def ExtendedTimeout_dbus_property(self, value=None):

1586

2098

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2099

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

2100

* 1000)

1588

2101

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

1589

2102

1590

2103

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2104

@dbus_service_property(_interface,

2105

signature="t",

1592

2106

access="readwrite")

1593

2107

def Interval_dbus_property(self, value=None):

1594

2108

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2109

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

1596

2110

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

1597

2111

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

1598

2112

return

1599

2113

if self.enabled:

1600

2114

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

2115

GLib.source_remove(self.checker_initiator_tag)

2116

self.checker_initiator_tag = GLib.timeout_add(

2117

value, self.start_checker)

2118

self.start_checker() # Start one now, too

2119

1606

2120

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2121

@dbus_service_property(_interface,

2122

signature="s",

1608

2123

access="readwrite")

1609

2124

def Checker_dbus_property(self, value=None):

1610

2125

if value is None: # get

1611

2126

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1613

2127

self.checker_command = str(value)

2128

1614

2129

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2130

@dbus_service_property(_interface,

2131

signature="b",

1616

2132

access="readwrite")

1617

2133

def CheckerRunning_dbus_property(self, value=None):

1618

2134

if value is None: # get

1621

2137

self.start_checker()

1622

2138

else:

1623

2139

self.stop_checker()

1624

2140

1625

2141

# ObjectPath - property

2142

@dbus_annotations(

2143

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

2144

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

1626

2145

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

1627

2146

def ObjectPath_dbus_property(self):

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2147

return self.dbus_object_path # is already a dbus.ObjectPath

2148

1630

2149

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2150

@dbus_annotations(

2151

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

2152

"invalidates"})

2153

@dbus_service_property(_interface,

2154

signature="ay",

2155

access="write",

2156

byte_arrays=True)

1633

2157

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1635

2158

self.secret = bytes(value)

2159

1636

2160

del _interface

1637

2161

1638

2162

1641

2165

self._pipe = child_pipe

1642

2166

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

1643

2167

if not self._pipe.recv():

1644

raise KeyError()

1645

2168

raise KeyError(fpr)

2169

1646

2170

def __getattribute__(self, name):

1647

2171

if name == '_pipe':

1648

2172

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

1651

2175

if data[0] == 'data':

1652

2176

return data[1]

1653

2177

if data[0] == 'function':

2178

1654

2179

def func(*args, **kwargs):

1655

2180

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

1656

2181

return self._pipe.recv()[1]

2182

1657

2183

return func

1658

2184

1659

2185

def __setattr__(self, name, value):

1660

2186

if name == '_pipe':

1661

2187

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

1664

2190

1665

2191

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

2192

"""A class to handle client connections.

1667

2193

1668

2194

Instantiated once for each connection to handle it.

1669

2195

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

1670

2196

1671

2197

def handle(self):

1672

2198

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

1673

2199

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

1674

unicode(self.client_address))

2200

str(self.client_address))

1675

2201

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

1676

2202

self.server.child_pipe.fileno())

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+DHE-DSS"))

2203

2204

session = gnutls.ClientSession(self.request)

2205

2206

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

2207

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

2208

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

2209

# "+DHE-DSS"))

1692

2210

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

1693

2211

priority = self.server.gnutls_priority

1694

2212

if priority is None:

1695

2213

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2214

gnutls.priority_set_direct(session._c_object,

2215

priority.encode("utf-8"),

2216

None)

2217

1700

2218

# Start communication using the Mandos protocol

1701

2219

# Get protocol number

1702

2220

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

1707

2225

except (ValueError, IndexError, RuntimeError) as error:

1708

2226

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

1709

2227

return

1710

2228

1711

2229

# Start GnuTLS connection

1712

2230

try:

1713

2231

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

2232

except gnutls.Error as error:

1715

2233

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

1716

2234

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

1717

2235

# established. Just abandon the request.

1718

2236

return

1719

2237

logger.debug("Handshake succeeded")

1720

2238

1721

2239

approval_required = False

1722

2240

try:

1723

2241

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

2242

fpr = self.fingerprint(

2243

self.peer_certificate(session))

2244

except (TypeError, gnutls.Error) as error:

1728

2245

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

1729

2246

return

1730

2247

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

1731

2248

1732

2249

try:

1733

2250

client = ProxyClient(child_pipe, fpr,

1734

2251

self.client_address)

1735

2252

except KeyError:

1736

2253

return

1737

2254

1738

2255

if client.approval_delay:

1739

2256

delay = client.approval_delay

1740

2257

client.approvals_pending += 1

1741

2258

approval_required = True

1742

2259

1743

2260

while True:

1744

2261

if not client.enabled:

1745

2262

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

1746

client.name)

2263

client.name)

1747

2264

if self.server.use_dbus:

1748

2265

# Emit D-Bus signal

1749

2266

client.Rejected("Disabled")

1750

2267

return

1751

2268

1752

2269

if client.approved or not client.approval_delay:

1753

#We are approved or approval is disabled

2270

# We are approved or approval is disabled

1754

2271

break

1755

2272

elif client.approved is None:

1756

2273

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

1758

2275

if self.server.use_dbus:

1759

2276

# Emit D-Bus signal

1760

2277

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2278

client.approval_delay.total_seconds()

2279

* 1000, client.approved_by_default)

1763

2280

else:

1764

2281

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

1765

2282

client.name)

1767

2284

# Emit D-Bus signal

1768

2285

client.Rejected("Denied")

1769

2286

return

1770

1771

#wait until timeout or approved

2287

2288

# wait until timeout or approved

1772

2289

time = datetime.datetime.now()

1773

2290

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2291

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

1777

2292

client.changedstate.release()

1778

2293

time2 = datetime.datetime.now()

1779

2294

if (time2 - time) >= delay:

1789

2304

break

1790

2305

else:

1791

2306

delay -= time2 - time

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

2307

2308

try:

2309

session.send(client.secret)

2310

except gnutls.Error as error:

2311

logger.warning("gnutls send failed",

2312

exc_info=error)

2313

return

2314

1806

2315

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

1807

2316

# bump the timeout using extended_timeout

1808

2317

client.bump_timeout(client.extended_timeout)

1809

2318

if self.server.use_dbus:

1810

2319

# Emit D-Bus signal

1811

2320

client.GotSecret()

1812

2321

1813

2322

finally:

1814

2323

if approval_required:

1815

2324

client.approvals_pending -= 1

1816

2325

try:

1817

2326

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

2327

except gnutls.Error as error:

1819

2328

logger.warning("GnuTLS bye failed",

1820

2329

exc_info=error)

1821

2330

1822

2331

@staticmethod

1823

2332

def peer_certificate(session):

1824

2333

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

1825

2334

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2335

if (gnutls.certificate_type_get(session._c_object)

2336

!= gnutls.CRT_OPENPGP):

2337

# ...return invalid data

2338

return b""

1831

2339

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2340

cert_list = (gnutls.certificate_get_peers

1834

2341

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

1835

2342

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

1836

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

1837

" certificate")

2343

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

1838

2344

if list_size.value == 0:

1839

2345

return None

1840

2346

cert = cert_list[0]

1841

2347

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

1842

2348

1843

2349

@staticmethod

1844

2350

def fingerprint(openpgp):

1845

2351

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2352

# New GnuTLS "datum" with the OpenPGP public key

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

2353

datum = gnutls.datum_t(

2354

ctypes.cast(ctypes.c_char_p(openpgp),

2355

ctypes.POINTER(ctypes.c_ubyte)),

2356

ctypes.c_uint(len(openpgp)))

1852

2357

# New empty GnuTLS certificate

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2358

crt = gnutls.openpgp_crt_t()

2359

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2360

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2361

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

2362

gnutls.OPENPGP_FMT_RAW)

1861

2363

# Verify the self signature in the key

1862

2364

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2365

gnutls.openpgp_crt_verify_self(crt, 0,

2366

ctypes.byref(crtverify))

1866

2367

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2368

gnutls.openpgp_crt_deinit(crt)

2369

raise gnutls.CertificateSecurityError("Verify failed")

1870

2370

# New buffer for the fingerprint

1871

2371

buf = ctypes.create_string_buffer(20)

1872

2372

buf_len = ctypes.c_size_t()

1873

2373

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2374

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

2375

ctypes.byref(buf_len))

1877

2376

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

gnutls.openpgp_crt_deinit(crt)

1879

2378

# Convert the buffer to a Python bytestring

1880

2379

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

1881

2380

# Convert the bytestring to hexadecimal notation

1885

2384

1886

2385

class MultiprocessingMixIn(object):

1887

2386

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

2387

1888

2388

def sub_process_main(self, request, address):

1889

2389

try:

1890

2390

self.finish_request(request, address)

1891

2391

except Exception:

1892

2392

self.handle_error(request, address)

1893

2393

self.close_request(request)

1894

2394

1895

2395

def process_request(self, request, address):

1896

2396

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

1897

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

1898

args = (request, address))

2397

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

2398

args=(request, address))

1899

2399

proc.start()

1900

2400

return proc

1901

2401

1902

2402

1903

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

2404

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

2405

1905

2406

def process_request(self, request, client_address):

1906

2407

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

1907

2408

1908

2409

This function creates a new pipe in self.pipe

1909

2410

"""

1910

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

2412

1912

2413

proc = MultiprocessingMixIn.process_request(self, request,

1913

2414

client_address)

1914

2415

self.child_pipe.close()

1915

2416

self.add_pipe(parent_pipe, proc)

1916

2417

1917

2418

def add_pipe(self, parent_pipe, proc):

1918

2419

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

1919

2420

raise NotImplementedError()

1922

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

2424

socketserver.TCPServer, object):

1924

2425

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

1925

2426

1926

2427

Attributes:

1927

2428

enabled: Boolean; whether this server is activated yet

1928

2429

interface: None or a network interface name (string)

1929

2430

use_ipv6: Boolean; to use IPv6 or not

1930

2431

"""

2432

1931

2433

def __init__(self, server_address, RequestHandlerClass,

1932

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

2434

interface=None,

2435

use_ipv6=True,

2436

socketfd=None):

1933

2437

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

1934

2438

creating a new one with socket.socket().

1935

2439

"""

1941

2445

self.socketfd = socketfd

1942

2446

# Save the original socket.socket() function

1943

2447

self.socket_socket = socket.socket

2448

1944

2449

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

1945

#

2450

#

1946

2451

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

1947

2452

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

1948

2453

# patching socket.socket.)

1949

#

2454

#

1950

2455

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

1951

2456

@functools.wraps(socket.socket)

1952

2457

def socket_wrapper(*args, **kwargs):

1964

2469

# socket_wrapper(), if socketfd was set.

1965

2470

socketserver.TCPServer.__init__(self, server_address,

1966

2471

RequestHandlerClass)

1967

2472

1968

2473

def server_bind(self):

1969

2474

"""This overrides the normal server_bind() function

1970

2475

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

1971

2476

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

2477

global SO_BINDTODEVICE

1972

2478

if self.interface is not None:

1973

2479

if SO_BINDTODEVICE is None:

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

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

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

raise

2480

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

2481

# common enough.

2482

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

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

1995

2501

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

1996

2502

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

1997

2503

if not self.server_address[0]:

1998

2504

if self.address_family == socket.AF_INET6:

1999

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

2000

2506

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

2002

2508

self.server_address = (any_address,

2003

2509

self.server_address[1])

2004

2510

elif not self.server_address[1]:

2005

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

2006

0)

2511

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

2007

2512

# if self.interface:

2008

2513

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

2009

2514

# 0, # port

2015

2520

2016

2521

class MandosServer(IPv6_TCPServer):

2017

2522

"""Mandos server.

2018

2523

2019

2524

Attributes:

2020

2525

clients: set of Client objects

2021

2526

gnutls_priority GnuTLS priority string

2022

2527

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

2023

2024

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

2025

2530

"""

2531

2026

2532

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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

2533

interface=None,

2534

use_ipv6=True,

2535

clients=None,

2536

gnutls_priority=None,

2537

use_dbus=True,

2538

socketfd=None):

2029

2539

self.enabled = False

2030

2540

self.clients = clients

2031

2541

if self.clients is None:

2034

2544

self.gnutls_priority = gnutls_priority

2035

2545

IPv6_TCPServer.__init__(self, server_address,

2036

2546

RequestHandlerClass,

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2040

2551

def server_activate(self):

2041

2552

if self.enabled:

2042

2553

return socketserver.TCPServer.server_activate(self)

2043

2554

2044

2555

def enable(self):

2045

2556

self.enabled = True

2046

2557

2047

2558

def add_pipe(self, parent_pipe, proc):

2048

2559

# Call "handle_ipc" for both data and EOF events

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

proc = None, client_object=None):

2560

GLib.io_add_watch(

2561

parent_pipe.fileno(),

2562

GLib.IO_IN | GLib.IO_HUP,

2563

functools.partial(self.handle_ipc,

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2567

def handle_ipc(self, source, condition,

2568

parent_pipe=None,

2569

proc=None,

2570

client_object=None):

2058

2571

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

2059

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

2572

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

2060

2573

# Wait for other process to exit

2061

2574

proc.join()

2062

2575

return False

2063

2576

2064

2577

# Read a request from the child

2065

2578

request = parent_pipe.recv()

2066

2579

command = request[0]

2067

2580

2068

2581

if command == 'init':

2069

fpr = request[1]

2582

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

2070

2583

address = request[2]

2071

2072

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

2073

2586

if c.fingerprint == fpr:

2074

2587

client = c

2075

2588

break

2082

2595

address[0])

2083

2596

parent_pipe.send(False)

2084

2597

return False

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2598

2599

GLib.io_add_watch(

2600

parent_pipe.fileno(),

2601

GLib.IO_IN | GLib.IO_HUP,

2602

functools.partial(self.handle_ipc,

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2094

2606

parent_pipe.send(True)

2095

2607

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

2096

2608

# same fileno

2099

2611

funcname = request[1]

2100

2612

args = request[2]

2101

2613

kwargs = request[3]

2102

2614

2103

2615

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

2104

2616

funcname)(*args,

2105

**kwargs)))

2106

2617

**kwargs)))

2618

2107

2619

if command == 'getattr':

2108

2620

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2621

if isinstance(client_object.__getattribute__(attrname),

2622

collections.Callable):

2623

parent_pipe.send(('function', ))

2111

2624

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2625

parent_pipe.send((

2626

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

2627

2115

2628

if command == 'setattr':

2116

2629

attrname = request[1]

2117

2630

value = request[2]

2118

2631

setattr(client_object, attrname, value)

2119

2632

2120

2633

return True

2121

2634

2122

2635

2123

2636

def rfc3339_duration_to_delta(duration):

2124

2637

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

2125

2638

2126

2639

>>> rfc3339_duration_to_delta("P7D")

2127

2640

datetime.timedelta(7)

2128

2641

>>> rfc3339_duration_to_delta("PT60S")

2138

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

2652

datetime.timedelta(1, 200)

2140

2653

"""

2141

2654

2142

2655

# Parsing an RFC 3339 duration with regular expressions is not

2143

2656

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

2144

2657

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

2145

2658

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

2146

2659

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

2147

2660

# avoid excessive use of external libraries.

2148

2661

2149

2662

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2663

Token = collections.namedtuple("Token", (

2664

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

2665

# a "group" containing digits

2666

"value", # datetime.timedelta or None

2667

"followers")) # Tokens valid after this token

2159

2668

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

2160

2669

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

2161

2670

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

2162

2671

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

2163

2672

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2673

frozenset((token_end, )))

2165

2674

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

2166

2675

datetime.timedelta(minutes=1),

2167

2676

frozenset((token_second, token_end)))

2183

2692

frozenset((token_month, token_end)))

2184

2693

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

2185

2694

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2695

frozenset((token_end, )))

2187

2696

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

2188

2697

frozenset((token_year, token_month,

2189

2698

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2699

token_week)))

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2193

2703

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2196

2708

# Loop until end token is found

2197

2709

while found_token is not token_end:

2198

2710

# Search for any currently valid tokens

2214

2726

break

2215

2727

else:

2216

2728

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2729

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

2730

.format(duration))

2218

2731

# End token found

2219

2732

return value

2220

2733

2221

2734

2222

2735

def string_to_delta(interval):

2223

2736

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

2224

2737

2225

2738

>>> string_to_delta('7d')

2226

2739

datetime.timedelta(7)

2227

2740

>>> string_to_delta('60s')

2235

2748

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

2236

2749

datetime.timedelta(0, 330)

2237

2750

"""

2238

2751

2239

2752

try:

2240

2753

return rfc3339_duration_to_delta(interval)

2241

2754

except ValueError:

2242

2755

pass

2243

2756

2244

2757

timevalue = datetime.timedelta(0)

2245

2758

for s in interval.split():

2246

2759

try:

2247

suffix = unicode(s[-1])

2760

suffix = s[-1]

2248

2761

value = int(s[:-1])

2249

2762

if suffix == "d":

2250

2763

delta = datetime.timedelta(value)

2257

2770

elif suffix == "w":

2258

2771

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

2259

2772

else:

2260

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

2261

.format(suffix))

2773

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

2262

2774

except IndexError as e:

2263

2775

raise ValueError(*(e.args))

2264

2776

timevalue += delta

2265

2777

return timevalue

2266

2778

2267

2779

2268

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

2780

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

2269

2781

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

2270

2782

2271

2783

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

2272

2784

if os.fork():

2273

2785

sys.exit()

2281

2793

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

2282

2794

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

2283

2795

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2796

"{} not a character device"

2285

2797

.format(os.devnull))

2286

2798

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

2287

2799

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

2291

2803

2292

2804

2293

2805

def main():

2294

2806

2295

2807

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

2296

2808

# Parsing of options, both command line and config file

2297

2809

2298

2810

parser = argparse.ArgumentParser()

2299

2811

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

2300

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

2812

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

2301

2813

help="show version number and exit")

2302

2814

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

2303

2815

help="Bind to interface IF")

2336

2848

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

2337

2849

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

2338

2850

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

2339

2851

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

2852

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

2853

default=None)

2854

2340

2855

options = parser.parse_args()

2341

2856

2342

2857

if options.check:

2343

2858

import doctest

2344

2859

fail_count, test_count = doctest.testmod()

2345

2860

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

2346

2861

2347

2862

# Default values for config file for server-global settings

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

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

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2364

2881

# Parse config file for server-global settings

2365

2882

server_config = configparser.SafeConfigParser(server_defaults)

2366

2883

del server_defaults

2367

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

2368

"mandos.conf"))

2884

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

2369

2885

# Convert the SafeConfigParser object to a dict

2370

2886

server_settings = server_config.defaults()

2371

2887

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

2372

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

2888

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

2889

"foreground", "zeroconf"):

2373

2890

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

2374

2891

option)

2375

2892

if server_settings["port"]:

2385

2902

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

2386

2903

["socket"])

2387

2904

del server_config

2388

2905

2389

2906

# Override the settings from the config file with command line

2390

2907

# options, if set.

2391

2908

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

2392

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

2393

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

2394

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

2909

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

2910

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

2911

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

2395

2912

value = getattr(options, option)

2396

2913

if value is not None:

2397

2914

server_settings[option] = value

2398

2915

del options

2399

2916

# Force all strings to be unicode

2400

2917

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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

2918

if isinstance(server_settings[option], bytes):

2919

server_settings[option] = (server_settings[option]

2920

.decode("utf-8"))

2403

2921

# Force all boolean options to be boolean

2404

2922

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

2405

"foreground"):

2923

"foreground", "zeroconf"):

2406

2924

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

2407

2925

# Debug implies foreground

2408

2926

if server_settings["debug"]:

2409

2927

server_settings["foreground"] = True

2410

2928

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

2411

2929

2412

2930

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

2413

2931

2932

if (not server_settings["zeroconf"]

2933

and not (server_settings["port"]

2934

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

2935

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

2936

2414

2937

# For convenience

2415

2938

debug = server_settings["debug"]

2416

2939

debuglevel = server_settings["debuglevel"]

2419

2942

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

2420

2943

stored_state_file)

2421

2944

foreground = server_settings["foreground"]

2422

2945

zeroconf = server_settings["zeroconf"]

2946

2423

2947

if debug:

2424

2948

initlogger(debug, logging.DEBUG)

2425

2949

else:

2428

2952

else:

2429

2953

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

2430

2954

initlogger(debug, level)

2431

2955

2432

2956

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

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

2957

syslogger.setFormatter(

2958

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

2959

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

2960

server_settings["servicename"])))

2961

2439

2962

# Parse config file with clients

2440

2963

client_config = configparser.SafeConfigParser(Client

2441

2964

.client_defaults)

2442

2965

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

2443

2966

"clients.conf"))

2444

2967

2445

2968

global mandos_dbus_service

2446

2969

mandos_dbus_service = None

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2970

2971

socketfd = None

2972

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

2973

socketfd = server_settings["socket"]

2974

tcp_server = MandosServer(

2975

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

2976

ClientHandler,

2977

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

2978

use_ipv6=use_ipv6,

2979

gnutls_priority=server_settings["priority"],

2980

use_dbus=use_dbus,

2981

socketfd=socketfd)

2459

2982

if not foreground:

2460

2983

pidfilename = "/run/mandos.pid"

2461

2984

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

2462

2985

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

2463

2986

pidfile = None

2464

2987

try:

2465

pidfile = open(pidfilename, "w")

2988

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

2466

2989

except IOError as e:

2467

2990

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

2468

2991

exc_info=e)

2469

2470

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

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2471

2996

try:

2472

2997

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2998

gid = pwd.getpwnam(group).pw_gid

2474

2999

break

2475

3000

except KeyError:

2476

3001

continue

2480

3005

try:

2481

3006

os.setgid(gid)

2482

3007

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

2483

3011

except OSError as error:

3012

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

3013

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

2484

3014

if error.errno != errno.EPERM:

2485

3015

raise

2486

3016

2487

3017

if debug:

2488

3018

# Enable all possible GnuTLS debugging

2489

3019

2490

3020

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

2491

3021

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2495

3025

def debug_gnutls(level, string):

2496

3026

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

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2501

3030

# Redirect stdin so all checkers get /dev/null

2502

3031

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

2503

3032

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

2504

3033

if null > 2:

2505

3034

os.close(null)

2506

3035

2507

3036

# Need to fork before connecting to D-Bus

2508

3037

if not foreground:

2509

3038

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

2510

3039

daemon()

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

3040

3041

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

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2516

3045

global main_loop

2517

3046

# From the Avahi example code

2518

3047

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3048

main_loop = GLib.MainLoop()

2520

3049

bus = dbus.SystemBus()

2521

3050

# End of Avahi example code

2522

3051

if use_dbus:

2523

3052

try:

2524

3053

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

3054

bus,

3055

do_not_queue=True)

3056

old_bus_name = dbus.service.BusName(

3057

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

3058

do_not_queue=True)

3059

except dbus.exceptions.DBusException as e:

2530

3060

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

2531

3061

use_dbus = False

2532

3062

server_settings["use_dbus"] = False

2533

3063

tcp_server.use_dbus = False

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

3064

if zeroconf:

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3066

service = AvahiServiceToSyslog(

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

3071

if server_settings["interface"]:

3072

service.interface = if_nametoindex(

3073

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

3074

2543

3075

global multiprocessing_manager

2544

3076

multiprocessing_manager = multiprocessing.Manager()

2545

3077

2546

3078

client_class = Client

2547

3079

if use_dbus:

2548

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

2549

3080

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

3081

2550

3082

client_settings = Client.config_parser(client_config)

2551

3083

old_client_settings = {}

2552

3084

clients_data = {}

2553

3085

2554

3086

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

2555

3087

global wnull

2556

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

3088

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

2557

3089

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

2558

3090

# mode

2559

3091

if debug or not foreground:

2560

3092

wnull.close()

2561

3093

2562

3094

# Get client data and settings from last running state.

2563

3095

if server_settings["restore"]:

2564

3096

try:

2565

3097

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

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

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

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

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

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

3115

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

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

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

3127

if isinstance(value[k], bytes):

3128

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

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

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

3141

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

3142

.decode("utf-8"))

2568

3143

os.remove(stored_state_path)

2569

3144

except IOError as e:

2570

3145

if e.errno == errno.ENOENT:

2571

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

2572

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

3146

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

3147

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

2573

3148

else:

2574

3149

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

2575

3150

exc_info=e)

2576

3151

raise

2577

3152

except EOFError as e:

2578

3153

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

2579

"EOFError:", exc_info=e)

2580

3154

"EOFError:",

3155

exc_info=e)

3156

2581

3157

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3158

for client_name, client in clients_data.items():

2583

3159

# Skip removed clients

2584

3160

if client_name not in client_settings:

2585

3161

continue

2586

3162

2587

3163

# Decide which value to use after restoring saved state.

2588

3164

# We have three different values: Old config file,

2589

3165

# new config file, and saved state.

2594

3170

# For each value in new config, check if it

2595

3171

# differs from the old config value (Except for

2596

3172

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3173

if (name != "secret"

3174

and (value !=

3175

old_client_settings[client_name][name])):

2600

3176

client[name] = value

2601

3177

except KeyError:

2602

3178

pass

2603

3179

2604

3180

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3181

# enabled if its last checker was successful. A Client

2606

3182

# whose checker succeeded before we stored its state is

2607

3183

# assumed to have successfully run all checkers during

2608

3184

# downtime.

2610

3186

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

2611

3187

if not client["last_checked_ok"]:

2612

3188

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3189

"disabling client {} - Client never "

3190

"performed a successful checker".format(

3191

client_name))

2616

3192

client["enabled"] = False

2617

3193

elif client["last_checker_status"] != 0:

2618

3194

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3195

"disabling client {} - Client last"

3196

" checker failed with error code"

3197

" {}".format(

3198

client_name,

3199

client["last_checker_status"]))

2623

3200

client["enabled"] = False

2624

3201

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3202

client["expires"] = (

3203

datetime.datetime.utcnow()

3204

+ client["timeout"])

2628

3205

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3206

" keeping {} enabled".format(

3207

client_name))

2631

3208

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3209

client["secret"] = pgp.decrypt(

3210

client["encrypted_secret"],

3211

client_settings[client_name]["secret"])

2636

3212

except PGPError:

2637

3213

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3214

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

3215

client_name))

3216

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

3217

["secret"])

3218

2643

3219

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

2644

3220

for client_name in (set(old_client_settings)

2645

3221

- set(client_settings)):

2647

3223

for client_name in (set(client_settings)

2648

3224

- set(old_client_settings)):

2649

3225

clients_data[client_name] = client_settings[client_name]

2650

3226

2651

3227

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3228

for client_name, client in clients_data.items():

2653

3229

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2657

3234

if not tcp_server.clients:

2658

3235

logger.warning("No clients defined")

2659

3236

2660

3237

if not foreground:

2661

3238

if pidfile is not None:

3239

pid = os.getpid()

2662

3240

try:

2663

3241

with pidfile:

2664

pid = os.getpid()

2665

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

3242

print(pid, file=pidfile)

2666

3243

except IOError:

2667

3244

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

2668

3245

pidfilename, pid)

2669

3246

del pidfile

2670

3247

del pidfilename

2671

2672

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

2673

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

2674

3248

3249

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

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

2675

3253

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3254

3255

@alternate_dbus_interfaces(

3256

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

3257

class MandosDBusService(DBusObjectWithObjectManager):

2679

3258

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

3259

2680

3260

def __init__(self):

2681

3261

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

3262

2682

3263

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3264

2690

3265

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

2691

3266

def ClientAdded(self, objpath):

2692

3267

"D-Bus signal"

2693

3268

pass

2694

3269

2695

3270

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

2696

3271

def ClientNotFound(self, fingerprint, address):

2697

3272

"D-Bus signal"

2698

3273

pass

2699

3274

3275

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

3276

"true"})

2700

3277

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

2701

3278

def ClientRemoved(self, objpath, name):

2702

3279

"D-Bus signal"

2703

3280

pass

2704

3281

3282

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

3283

"true"})

2705

3284

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

2706

3285

def GetAllClients(self):

2707

3286

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3287

return dbus.Array(c.dbus_object_path for c in

3288

tcp_server.clients.values())

3289

3290

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

3291

"true"})

2712

3292

@dbus.service.method(_interface,

2713

3293

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

2714

3294

def GetAllClientsWithProperties(self):

2715

3295

"D-Bus method"

2716

3296

return dbus.Dictionary(

2717

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

2718

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

3297

{c.dbus_object_path: c.GetAll(

3298

"se.recompile.Mandos.Client")

3299

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

2719

3300

signature="oa{sv}")

2720

3301

2721

3302

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

2722

3303

def RemoveClient(self, object_path):

2723

3304

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

2725

3306

if c.dbus_object_path == object_path:

2726

3307

del tcp_server.clients[c.name]

2727

3308

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3309

# Don't signal the disabling

2729

3310

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3311

# Emit D-Bus signal for removal

3312

self.client_removed_signal(c)

2732

3313

return

2733

3314

raise KeyError(object_path)

2734

3315

2735

3316

del _interface

2736

3317

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3319

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

3320

def GetManagedObjects(self):

3321

"""D-Bus method"""

3322

return dbus.Dictionary(

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

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

3329

3330

def client_added_signal(self, client):

3331

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

3332

if use_dbus:

3333

# New standard signal

3334

self.InterfacesAdded(

3335

client.dbus_object_path,

3336

dbus.Dictionary(

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

3340

# Old signal

3341

self.ClientAdded(client.dbus_object_path)

3342

3343

def client_removed_signal(self, client):

3344

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

3345

if use_dbus:

3346

# New standard signal

3347

self.InterfacesRemoved(

3348

client.dbus_object_path,

3349

client._get_all_interface_names())

3350

# Old signal

3351

self.ClientRemoved(client.dbus_object_path,

3352

client.name)

3353

2737

3354

mandos_dbus_service = MandosDBusService()

2738

3355

3356

# Save modules to variables to exempt the modules from being

3357

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

3358

mp = multiprocessing

3359

wn = wnull

3360

2739

3361

def cleanup():

2740

3362

"Cleanup function; run on exit"

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3363

if zeroconf:

3364

service.cleanup()

3365

3366

mp.active_children()

3367

wn.close()

2745

3368

if not (tcp_server.clients or client_settings):

2746

3369

return

2747

3370

2748

3371

# Store client before exiting. Secrets are encrypted with key

2749

3372

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

2750

3373

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

2751

3374

clients = {}

2752

3375

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

2754

3377

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

2755

3378

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

2756

3379

key)

2757

3380

client_dict = {}

2758

3381

2759

3382

# A list of attributes that can not be pickled

2760

3383

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3384

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

3385

"checker", "server_settings"}

3386

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

3387

.Object):

2765

3388

exclude.add(name)

2766

3389

2767

3390

client_dict["encrypted_secret"] = (client

2768

3391

.encrypted_secret)

2769

3392

for attr in client.client_structure:

2770

3393

if attr not in exclude:

2771

3394

client_dict[attr] = getattr(client, attr)

2772

3395

2773

3396

clients[client.name] = client_dict

2774

3397

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

2775

3398

2776

3399

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

3400

with tempfile.NamedTemporaryFile(

3401

mode='wb',

3402

suffix=".pickle",

3403

prefix='clients-',

3404

dir=os.path.dirname(stored_state_path),

3405

delete=False) as stored_state:

3406

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

3407

protocol=2)

3408

tempname = stored_state.name

2783

3409

os.rename(tempname, stored_state_path)

2784

3410

except (IOError, OSError) as e:

2785

3411

if not debug:

2788

3414

except NameError:

2789

3415

pass

2790

3416

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

2791

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

3417

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

2792

3418

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

2793

3419

else:

2794

3420

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

2795

3421

exc_info=e)

2796

3422

raise

2797

3423

2798

3424

# Delete all clients, and settings from config

2799

3425

while tcp_server.clients:

2800

3426

name, client = tcp_server.clients.popitem()

2801

3427

if use_dbus:

2802

3428

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3429

# Don't signal the disabling

2804

3430

client.disable(quiet=True)

3431

# Emit D-Bus signal for removal

2805

3432

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3433

mandos_dbus_service.client_removed_signal(client)

2810

3434

client_settings.clear()

2811

3435

2812

3436

atexit.register(cleanup)

2813

2814

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

2815

3439

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

# Emit D-Bus signal for adding

3441

mandos_dbus_service.client_added_signal(client)

2818

3442

# Need to initiate checking of clients

2819

3443

if client.enabled:

2820

3444

client.init_checker()

2821

3445

2822

3446

tcp_server.enable()

2823

3447

tcp_server.server_activate()

2824

3448

2825

3449

# Find out what port we got

2826

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

3450

if zeroconf:

3451

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

2827

3452

if use_ipv6:

2828

3453

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

2829

3454

" flowinfo %d, scope_id %d",

2831

3456

else: # IPv4

2832

3457

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

2833

3458

*tcp_server.socket.getsockname())

2834

2835

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

2836

3459

3460

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

3461

2837

3462

try:

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

3463

if zeroconf:

3464

# From the Avahi example code

3465

try:

3466

service.activate()

3467

except dbus.exceptions.DBusException as error:

3468

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

3469

cleanup()

3470

sys.exit(1)

3471

# End of Avahi example code

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

2852

3478

logger.debug("Starting main loop")

2853

3479

main_loop.run()

2854

3480

except AvahiError as error:

2863

3489

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

2864

3490

cleanup()

2865

3491

3492

2866

3493

if __name__ == '__main__':

2867

3494

main()