/mandos/trunk : revision 654

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.16"

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SO_BINDTODEVICE = None

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version = "1.6.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown=False):

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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303

304

221

class AvahiError(Exception):

305

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

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223

self.value = value

307

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

308

**kwargs)

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

225

def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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314

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class AvahiGroupError(AvahiError):

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pass

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234

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

345

TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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261

self.name = name

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262

self.type = servicetype

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271

self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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366

def rename(self, remove=True):

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def rename(self):

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

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277

if self.rename_count >= self.max_renames:

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278

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

370

279

" after %i retries, exiting.",

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280

self.rename_count)

372

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raise AvahiServiceError("Too many renames")

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

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

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285

self.name)

378

if remove:

379

self.remove()

286

self.remove()

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try:

381

288

self.add()

382

289

except dbus.exceptions.DBusException as error:

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

392

295

def remove(self):

393

296

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

394

297

if self.entry_group_state_changed_match is not None:

396

299

self.entry_group_state_changed_match = None

397

300

if self.group is not None:

398

301

self.group.Reset()

399

302

400

303

def add(self):

401

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

402

305

self.remove()

419

322

dbus.UInt16(self.port),

420

323

avahi.string_array_to_txt_array(self.TXT))

421

324

self.group.Commit()

422

325

423

326

def entry_group_state_changed(self, state, error):

424

327

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

425

328

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

426

329

427

330

if state == avahi.ENTRY_GROUP_ESTABLISHED:

428

331

logger.debug("Zeroconf service established.")

429

332

elif state == avahi.ENTRY_GROUP_COLLISION:

431

334

self.rename()

432

335

elif state == avahi.ENTRY_GROUP_FAILURE:

433

336

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

434

str(error))

435

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

436

337

unicode(error))

338

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

339

.format(error))

340

437

341

def cleanup(self):

438

342

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

439

343

if self.group is not None:

444

348

pass

445

349

self.group = None

446

350

self.remove()

447

351

448

352

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

449

353

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

450

354

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

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

457

362

if state in bad_states:

458

363

if bad_states[state] is not None:

459

364

if error is None:

462

367

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

463

368

self.cleanup()

464

369

elif state == avahi.SERVER_RUNNING:

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

370

self.add()

477

371

else:

478

372

if error is None:

479

373

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

480

374

else:

481

375

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

482

376

483

377

def activate(self):

484

378

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

485

379

if self.server is None:

489

383

follow_name_owner_changes=True),

490

384

avahi.DBUS_INTERFACE_SERVER)

491

385

self.server.connect_to_signal("StateChanged",

492

self.server_state_changed)

386

self.server_state_changed)

493

387

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

494

388

495

389

496

390

class AvahiServiceToSyslog(AvahiService):

497

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

391

def rename(self):

498

392

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

499

ret = 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)))

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

504

398

return ret

505

399

506

400

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()

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

779

406

780

407

781

408

class Client(object):

782

409

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

783

410

784

411

Attributes:

785

412

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

786

413

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

788

415

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

789

416

to see if the client lives.

790

417

'None' if no process is running.

791

checker_callback_tag: a GLib event source tag, or None

418

checker_callback_tag: a gobject event source tag, or None

792

419

checker_command: string; External command which is run to check

793

420

if client lives. %() expansions are done at

794

421

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

795

422

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

796

checker_initiator_tag: a GLib event source tag, or None

423

checker_initiator_tag: a gobject event source tag, or None

797

424

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

798

425

client_structure: Object describing what attributes a client has

799

426

and is used for storing the client at exit

800

427

current_checker_command: string; current running checker_command

801

disable_initiator_tag: a GLib event source tag, or None

428

disable_initiator_tag: a gobject event source tag, or None

802

429

enabled: bool()

803

430

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

804

431

uniquely identify the client

809

436

last_checker_status: integer between 0 and 255 reflecting exit

810

437

status of last checker. -1 reflects crashed

811

438

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

814

439

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

815

440

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

816

441

D-Bus identifiers

823

448

disabled, or None

824

449

server_settings: The server_settings dict from main()

825

450

"""

826

451

827

452

runtime_expansions = ("approval_delay", "approval_duration",

828

453

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

829

454

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

830

455

"last_approval_request", "last_checked_ok",

831

456

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

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

844

483

@staticmethod

845

484

def config_parser(config):

846

485

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

853

492

for client_name in config.sections():

854

493

section = dict(config.items(client_name))

855

494

client = settings[client_name] = {}

856

495

857

496

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

858

497

# Reformat values from string types to Python types

859

498

client["approved_by_default"] = config.getboolean(

860

499

client_name, "approved_by_default")

861

500

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

862

501

"enabled")

863

864

# Uppercase and remove spaces from fingerprint for later

865

# comparison purposes with return value from the

866

# fingerprint() function

502

867

503

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

868

504

.replace(" ", ""))

869

505

if "secret" in section:

870

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

871

.encode("utf-8"),

872

"base64")

506

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

873

507

elif "secfile" in section:

874

508

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

875

509

(section["secfile"])),

876

510

"rb") as secfile:

877

511

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

878

512

else:

879

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

513

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

880

514

.format(section))

881

515

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

882

516

client["extended_timeout"] = string_to_delta(

890

524

client["last_approval_request"] = None

891

525

client["last_checked_ok"] = None

892

526

client["last_checker_status"] = -2

893

527

894

528

return settings

895

896

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

529

530

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

897

531

self.name = name

898

532

if server_settings is None:

899

533

server_settings = {}

900

534

self.server_settings = server_settings

901

535

# adding all client settings

902

for setting, value in settings.items():

536

for setting, value in settings.iteritems():

903

537

setattr(self, setting, value)

904

538

905

539

if self.enabled:

906

540

if not hasattr(self, "last_enabled"):

907

541

self.last_enabled = datetime.datetime.utcnow()

911

545

else:

912

546

self.last_enabled = None

913

547

self.expires = None

914

548

915

549

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

916

553

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

917

554

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

918

555

datetime.datetime.utcnow())

919

556

920

557

# attributes specific for this server instance

921

558

self.checker = None

922

559

self.checker_initiator_tag = None

925

562

self.current_checker_command = None

926

563

self.approved = None

927

564

self.approvals_pending = 0

928

self.changedstate = multiprocessing_manager.Condition(

929

multiprocessing_manager.Lock())

930

self.client_structure = [attr

931

for attr in self.__dict__.keys()

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

932

570

if not attr.startswith("_")]

933

571

self.client_structure.append("client_structure")

934

935

for name, t in inspect.getmembers(

936

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

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

937

577

if not name.startswith("_"):

938

578

self.client_structure.append(name)

939

579

940

580

# Send notice to process children that client state has changed

941

581

def send_changedstate(self):

942

582

with self.changedstate:

943

583

self.changedstate.notify_all()

944

584

945

585

def enable(self):

946

586

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

947

587

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

952

592

self.last_enabled = datetime.datetime.utcnow()

953

593

self.init_checker()

954

594

self.send_changedstate()

955

595

956

596

def disable(self, quiet=True):

957

597

"""Disable this client."""

958

598

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

960

600

if not quiet:

961

601

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

962

602

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

963

GLib.source_remove(self.disable_initiator_tag)

603

gobject.source_remove(self.disable_initiator_tag)

964

604

self.disable_initiator_tag = None

965

605

self.expires = None

966

606

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

967

GLib.source_remove(self.checker_initiator_tag)

607

gobject.source_remove(self.checker_initiator_tag)

968

608

self.checker_initiator_tag = None

969

609

self.stop_checker()

970

610

self.enabled = False

971

611

if not quiet:

972

612

self.send_changedstate()

973

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

613

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

974

614

return False

975

615

976

616

def __del__(self):

977

617

self.disable()

978

618

979

619

def init_checker(self):

980

620

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

981

621

# and every interval from then on.

982

622

if self.checker_initiator_tag is not None:

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)

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

987

627

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

988

628

if self.disable_initiator_tag is not None:

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)

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

992

633

# Also start a new checker *right now*.

993

634

self.start_checker()

994

995

def checker_callback(self, source, condition, connection,

996

command):

635

636

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

997

637

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

998

638

self.checker_callback_tag = None

999

639

self.checker = None

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

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1007

642

if self.last_checker_status == 0:

1008

643

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

1009

644

vars(self))

1010

645

self.checked_ok()

1011

646

else:

1012

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

647

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

648

vars(self))

1013

649

else:

1014

650

self.last_checker_status = -1

1015

self.last_checker_signal = -returncode

1016

651

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

1017

652

vars(self))

1018

return False

1019

653

1020

654

def checked_ok(self):

1021

655

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

1022

656

self.last_checked_ok = datetime.datetime.utcnow()

1023

657

self.last_checker_status = 0

1024

self.last_checker_signal = None

1025

658

self.bump_timeout()

1026

659

1027

660

def bump_timeout(self, timeout=None):

1028

661

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

1029

662

if timeout is None:

1030

663

timeout = self.timeout

1031

664

if self.disable_initiator_tag is not None:

1032

GLib.source_remove(self.disable_initiator_tag)

665

gobject.source_remove(self.disable_initiator_tag)

1033

666

self.disable_initiator_tag = None

1034

667

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

1035

self.disable_initiator_tag = GLib.timeout_add(

1036

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1037

671

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

1038

672

1039

673

def need_approval(self):

1040

674

self.last_approval_request = datetime.datetime.utcnow()

1041

675

1042

676

def start_checker(self):

1043

677

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

1044

678

1045

679

If a checker already exists, leave it running and do

1046

680

nothing."""

1047

681

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

1052

686

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

1053

687

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

1054

688

# should be.

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

689

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

1060

704

# Start a new checker if needed

1061

705

if self.checker is None:

1062

706

# Escape attributes for the shell

1063

escaped_attrs = {

1064

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

1065

for attr in self.runtime_expansions}

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1066

711

try:

1067

712

command = self.checker_command % escaped_attrs

1068

713

except TypeError as error:

1069

714

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

1070

self.checker_command,

715

self.checker_command, exc_info=error)

716

return True # Try again later

717

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

1071

739

exc_info=error)

1072

return True # Try again later

1073

self.current_checker_command = command

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

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

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

1100

760

return True

1101

761

1102

762

def stop_checker(self):

1103

763

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

1104

764

if self.checker_callback_tag:

1105

GLib.source_remove(self.checker_callback_tag)

765

gobject.source_remove(self.checker_callback_tag)

1106

766

self.checker_callback_tag = None

1107

767

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

1108

768

return

1109

769

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

1110

self.checker.terminate()

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1111

778

self.checker = None

1112

779

1113

780

1114

def dbus_service_property(dbus_interface,

1115

signature="v",

1116

access="readwrite",

1117

byte_arrays=False):

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1118

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1119

784

become properties on the D-Bus.

1120

785

1121

786

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

1122

787

and with one argument by "Set".

1123

788

1124

789

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

1125

790

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

1126

791

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

1129

794

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

1130

795

if byte_arrays and signature != "ay":

1131

796

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

1132

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

1133

797

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

1134

798

def decorator(func):

1135

799

func._dbus_is_property = True

1136

800

func._dbus_interface = dbus_interface

1139

803

func._dbus_name = func.__name__

1140

804

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

1141

805

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

1142

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1143

807

return func

1144

1145

808

return decorator

1146

809

1147

810

1148

811

def dbus_interface_annotations(dbus_interface):

1149

812

"""Decorator for marking functions returning interface annotations

1150

813

1151

814

Usage:

1152

815

1153

816

@dbus_interface_annotations("org.example.Interface")

1154

817

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

1155

818

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

1156

819

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

1157

820

"false"}

1158

821

"""

1159

1160

822

def decorator(func):

1161

823

func._dbus_is_interface = True

1162

824

func._dbus_interface = dbus_interface

1163

825

func._dbus_name = dbus_interface

1164

826

return func

1165

1166

827

return decorator

1167

828

1168

829

1169

830

def dbus_annotations(annotations):

1170

831

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

1171

832

Usage:

1172

1173

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

1174

"org.freedesktop.DBus.Property."

1175

"EmitsChangedSignal": "false"})

833

1176

834

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

1177

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

1178

839

def Property_dbus_property(self):

1179

840

return dbus.Boolean(False)

1180

1181

See also the DBusObjectWithAnnotations class.

1182

841

"""

1183

1184

842

def decorator(func):

1185

843

func._dbus_annotations = annotations

1186

844

return func

1187

1188

845

return decorator

1189

846

1190

847

1191

848

class DBusPropertyException(dbus.exceptions.DBusException):

1192

849

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

1193

850

"""

1194

pass

851

def __unicode__(self):

852

return unicode(str(self))

1195

853

1196

854

1197

855

class DBusPropertyAccessException(DBusPropertyException):

1206

864

pass

1207

865

1208

866

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.

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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

1214

873

"""

1215

874

1216

875

@staticmethod

1217

876

def _is_dbus_thing(thing):

1218

877

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

1219

878

1220

879

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

1221

880

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

1222

881

"""

1223

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

882

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

1224

883

False)

1225

884

1226

885

def _get_all_dbus_things(self, thing):

1227

886

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

1228

887

"""

1229

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

888

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

889

name),

1230

890

athing.__get__(self))

1231

891

for cls in self.__class__.__mro__

1232

892

for name, athing in

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

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

1306

896

def _get_dbus_property(self, interface_name, property_name):

1307

897

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

1308

898

property with the specified name and interface.

1309

899

"""

1310

for cls in self.__class__.__mro__:

1311

for name, value in inspect.getmembers(

1312

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

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

1313

904

if (value._dbus_name == property_name

1314

905

and value._dbus_interface == interface_name):

1315

906

return value.__get__(self)

1316

907

1317

908

# No such property

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",

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

1332

914

out_signature="v")

1333

915

def Get(self, interface_name, property_name):

1334

916

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

1340

922

if not hasattr(value, "variant_level"):

1341

923

return value

1342

924

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

1343

925

1344

926

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

1345

927

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

1346

928

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

1353

935

# signatures other than "ay".

1354

936

if prop._dbus_signature != "ay":

1355

937

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

1356

"'ay' signature {!r}"

938

"'ay' signature {0!r}"

1357

939

.format(prop._dbus_signature))

1358

940

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

1359

941

for byte in value))

1360

942

prop(value)

1361

1362

@dbus.service.method(dbus.PROPERTIES_IFACE,

1363

in_signature="s",

943

944

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

1364

945

out_signature="a{sv}")

1365

946

def GetAll(self, interface_name):

1366

947

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

1367

948

standard.

1368

949

1369

950

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

1370

951

"""

1371

952

properties = {}

1381

962

if not hasattr(value, "variant_level"):

1382

963

properties[name] = value

1383

964

continue

1384

properties[name] = type(value)(

1385

value, variant_level=value.variant_level + 1)

965

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

966

value.variant_level+1)

1386

967

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

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

968

1396

969

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1397

970

out_signature="s",

1398

971

path_keyword='object_path',

1399

972

connection_keyword='connection')

1400

973

def Introspect(self, object_path, connection):

1401

974

"""Overloading of standard D-Bus method.

1402

975

1403

976

Inserts property tags and interface annotation tags.

1404

977

"""

1405

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1406

object_path,

1407

connection)

978

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

979

connection)

1408

980

try:

1409

981

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

1410

1411

982

def make_tag(document, name, prop):

1412

983

e = document.createElement("property")

1413

984

e.setAttribute("name", name)

1414

985

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

1415

986

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

1416

987

return e

1417

1418

988

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

1419

989

# Add property tags

1420

990

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

1423

993

if prop._dbus_interface

1424

994

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

1425

995

if_tag.appendChild(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)

996

# Add annotation tags

997

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

998

for tag in if_tag.getElementsByTagName(typ):

999

annots = dict()

1000

for name, prop in (self.

1001

_get_all_dbus_things(typ)):

1002

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

1003

and prop._dbus_interface

1004

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

1005

annots.update(getattr

1006

(prop,

1007

"_dbus_annotations",

1008

{}))

1009

for name, value in annots.iteritems():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().iteritems()

1019

for name, annotations in

1020

self._get_all_dbus_things("interface")

1021

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

1022

)).iteritems():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

1442

1027

# Add the names to the return values for the

1443

1028

# "org.freedesktop.DBus.Properties" methods

1444

1029

if (if_tag.getAttribute("name")

1463

1048

return xmlstring

1464

1049

1465

1050

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

1537

1051

def datetime_to_dbus(dt, variant_level=0):

1538

1052

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

1539

1053

if dt is None:

1540

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

1541

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

1054

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

1055

return dbus.String(dt.isoformat(),

1056

variant_level=variant_level)

1542

1057

1543

1058

1544

1059

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1546

1061

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

1547

1062

interface names according to the "alt_interface_names" mapping.

1548

1063

Usage:

1549

1064

1550

1065

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

1551

1066

"net.example.AlternateInterface"})

1552

1067

class SampleDBusObject(dbus.service.Object):

1553

1068

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

1554

1069

def SampleDBusMethod():

1555

1070

pass

1556

1071

1557

1072

The above "SampleDBusMethod" on "SampleDBusObject" will be

1558

1073

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

1559

1074

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

1560

1075

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

1561

1076

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

1562

1077

1563

1078

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

1564

1079

(from DBusObjectWithProperties) and interfaces (from the

1565

1080

dbus_interface_annotations decorator).

1566

1081

"""

1567

1568

1082

def wrapper(cls):

1569

1083

for orig_interface_name, alt_interface_name in (

1570

alt_interface_names.items()):

1084

alt_interface_names.iteritems()):

1571

1085

attr = {}

1572

1086

interface_names = set()

1573

1087

# Go though all attributes of the class

1575

1089

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

1576

1090

# with the wrong interface name

1577

1091

if (not hasattr(attribute, "_dbus_interface")

1578

or not attribute._dbus_interface.startswith(

1579

orig_interface_name)):

1092

or not attribute._dbus_interface

1093

.startswith(orig_interface_name)):

1580

1094

continue

1581

1095

# Create an alternate D-Bus interface name based on

1582

1096

# the current name

1583

alt_interface = attribute._dbus_interface.replace(

1584

orig_interface_name, alt_interface_name)

1097

alt_interface = (attribute._dbus_interface

1098

.replace(orig_interface_name,

1099

alt_interface_name))

1585

1100

interface_names.add(alt_interface)

1586

1101

# Is this a D-Bus signal?

1587

1102

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

1588

1103

# Extract the original non-method undecorated

1589

1104

# function by black magic

1590

if sys.version_info.major == 2:

1591

nonmethod_func = (dict(

1105

nonmethod_func = (dict(

1592

1106

zip(attribute.func_code.co_freevars,

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)

1107

attribute.__closure__))["func"]

1108

.cell_contents)

1600

1109

# Create a new, but exactly alike, function

1601

1110

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

1602

1111

# with the alternate D-Bus interface name

1603

new_function = copy_function(nonmethod_func)

1604

new_function = (dbus.service.signal(

1605

alt_interface,

1606

attribute._dbus_signature)(new_function))

1112

new_function = (dbus.service.signal

1113

(alt_interface,

1114

attribute._dbus_signature)

1115

(types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)))

1607

1121

# Copy annotations, if any

1608

1122

try:

1609

new_function._dbus_annotations = dict(

1610

attribute._dbus_annotations)

1123

new_function._dbus_annotations = (

1124

dict(attribute._dbus_annotations))

1611

1125

except AttributeError:

1612

1126

pass

1613

1614

1127

# Define a creator of a function to call both the

1615

1128

# original and alternate functions, so both the

1616

1129

# original and alternate signals gets sent when

1619

1132

"""This function is a scope container to pass

1620

1133

func1 and func2 to the "call_both" function

1621

1134

outside of its arguments"""

1622

1623

@functools.wraps(func2)

1624

1135

def call_both(*args, **kwargs):

1625

1136

"""This function will emit two D-Bus

1626

1137

signals by calling func1 and func2"""

1627

1138

func1(*args, **kwargs)

1628

1139

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

1635

1140

return call_both

1636

1141

# Create the "call_both" function and add it to

1637

1142

# the class

1642

1147

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

1643

1148

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

1644

1149

# to the class.

1645

attr[attrname] = (

1646

dbus.service.method(

1647

alt_interface,

1648

attribute._dbus_in_signature,

1649

attribute._dbus_out_signature)

1650

(copy_function(attribute)))

1150

attr[attrname] = (dbus.service.method

1151

(alt_interface,

1152

attribute._dbus_in_signature,

1153

attribute._dbus_out_signature)

1154

(types.FunctionType

1155

(attribute.func_code,

1156

attribute.func_globals,

1157

attribute.func_name,

1158

attribute.func_defaults,

1159

attribute.func_closure)))

1651

1160

# Copy annotations, if any

1652

1161

try:

1653

attr[attrname]._dbus_annotations = dict(

1654

attribute._dbus_annotations)

1162

attr[attrname]._dbus_annotations = (

1163

dict(attribute._dbus_annotations))

1655

1164

except AttributeError:

1656

1165

pass

1657

1166

# Is this a D-Bus property?

1660

1169

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

1661

1170

# property with the alternate D-Bus interface

1662

1171

# name. Add it to the class.

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)))

1172

attr[attrname] = (dbus_service_property

1173

(alt_interface,

1174

attribute._dbus_signature,

1175

attribute._dbus_access,

1176

attribute

1177

._dbus_get_args_options

1178

["byte_arrays"])

1179

(types.FunctionType

1180

(attribute.func_code,

1181

attribute.func_globals,

1182

attribute.func_name,

1183

attribute.func_defaults,

1184

attribute.func_closure)))

1669

1185

# Copy annotations, if any

1670

1186

try:

1671

attr[attrname]._dbus_annotations = dict(

1672

attribute._dbus_annotations)

1187

attr[attrname]._dbus_annotations = (

1188

dict(attribute._dbus_annotations))

1673

1189

except AttributeError:

1674

1190

pass

1675

1191

# Is this a D-Bus interface?

1678

1194

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

1679

1195

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

1680

1196

# to the class.

1681

attr[attrname] = (

1682

dbus_interface_annotations(alt_interface)

1683

(copy_function(attribute)))

1197

attr[attrname] = (dbus_interface_annotations

1198

(alt_interface)

1199

(types.FunctionType

1200

(attribute.func_code,

1201

attribute.func_globals,

1202

attribute.func_name,

1203

attribute.func_defaults,

1204

attribute.func_closure)))

1684

1205

if deprecate:

1685

1206

# Deprecate all alternate interfaces

1686

iname = "_AlternateDBusNames_interface_annotation{}"

1207

iname="_AlternateDBusNames_interface_annotation{0}"

1687

1208

for interface_name in interface_names:

1688

1689

1209

@dbus_interface_annotations(interface_name)

1690

1210

def func(self):

1691

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

1692

"true"}

1211

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

1212

"true" }

1693

1213

# Find an unused name

1694

1214

for aname in (iname.format(i)

1695

1215

for i in itertools.count()):

1699

1219

if interface_names:

1700

1220

# Replace the class with a new subclass of it with

1701

1221

# methods, signals, etc. as created above.

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)

1222

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

1223

(cls,), attr)

1708

1224

return cls

1709

1710

1225

return wrapper

1711

1226

1712

1227

1713

1228

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

1714

"se.bsnet.fukt.Mandos"})

1229

"se.bsnet.fukt.Mandos"})

1715

1230

class ClientDBus(Client, DBusObjectWithProperties):

1716

1231

"""A Client class using D-Bus

1717

1232

1718

1233

Attributes:

1719

1234

dbus_object_path: dbus.ObjectPath

1720

1235

bus: dbus.SystemBus()

1721

1236

"""

1722

1237

1723

1238

runtime_expansions = (Client.runtime_expansions

1724

+ ("dbus_object_path", ))

1725

1726

_interface = "se.recompile.Mandos.Client"

1727

1239

+ ("dbus_object_path",))

1240

1728

1241

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

1729

1730

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

1242

1243

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

1731

1244

self.bus = bus

1732

1245

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

1733

1246

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

1734

1247

# the D-Bus

1735

client_object_name = str(self.name).translate(

1248

client_object_name = unicode(self.name).translate(

1736

1249

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

1737

1250

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

1738

self.dbus_object_path = dbus.ObjectPath(

1739

"/clients/" + client_object_name)

1251

self.dbus_object_path = (dbus.ObjectPath

1252

("/clients/" + client_object_name))

1740

1253

DBusObjectWithProperties.__init__(self, self.bus,

1741

1254

self.dbus_object_path)

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):

1255

1256

def notifychangeproperty(transform_func,

1257

dbus_name, type_func=lambda x: x,

1258

variant_level=1):

1748

1259

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

1749

1260

its changes to DBus.

1750

1261

1751

1262

transform_fun: Function that takes a value and a variant_level

1752

1263

and transforms it to a D-Bus type.

1753

1264

dbus_name: D-Bus name of the variable

1755

1266

to the D-Bus. Default: no transform

1756

1267

variant_level: D-Bus variant level. Default: 1

1757

1268

"""

1758

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

1759

1269

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

1760

1270

def setter(self, value):

1761

1271

if hasattr(self, "dbus_object_path"):

1762

1272

if (not hasattr(self, attrname) or

1763

1273

type_func(getattr(self, attrname, None))

1764

1274

!= type_func(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())

1275

dbus_value = transform_func(type_func(value),

1276

variant_level

1277

=variant_level)

1278

self.PropertyChanged(dbus.String(dbus_name),

1279

dbus_value)

1780

1280

setattr(self, attrname, value)

1781

1281

1782

1282

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

1783

1283

1784

1284

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1785

1285

approvals_pending = notifychangeproperty(dbus.Boolean,

1786

1286

"ApprovalPending",

1787

type_func=bool)

1287

type_func = bool)

1788

1288

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

1789

1289

last_enabled = notifychangeproperty(datetime_to_dbus,

1790

1290

"LastEnabled")

1791

checker = notifychangeproperty(

1792

dbus.Boolean, "CheckerRunning",

1793

type_func=lambda checker: checker is not None)

1291

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

1292

type_func = lambda checker:

1293

checker is not None)

1794

1294

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1795

1295

"LastCheckedOK")

1796

1296

last_checker_status = notifychangeproperty(dbus.Int16,

1799

1299

datetime_to_dbus, "LastApprovalRequest")

1800

1300

approved_by_default = notifychangeproperty(dbus.Boolean,

1801

1301

"ApprovedByDefault")

1802

approval_delay = notifychangeproperty(

1803

dbus.UInt64, "ApprovalDelay",

1804

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

1302

approval_delay = notifychangeproperty(dbus.UInt64,

1303

"ApprovalDelay",

1304

type_func =

1305

timedelta_to_milliseconds)

1805

1306

approval_duration = notifychangeproperty(

1806

1307

dbus.UInt64, "ApprovalDuration",

1807

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

1308

type_func = timedelta_to_milliseconds)

1808

1309

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

1809

timeout = notifychangeproperty(

1810

dbus.UInt64, "Timeout",

1811

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

1310

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

1311

type_func =

1312

timedelta_to_milliseconds)

1812

1313

extended_timeout = notifychangeproperty(

1813

1314

dbus.UInt64, "ExtendedTimeout",

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)

1315

type_func = timedelta_to_milliseconds)

1316

interval = notifychangeproperty(dbus.UInt64,

1317

"Interval",

1318

type_func =

1319

timedelta_to_milliseconds)

1818

1320

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

1819

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

1820

invalidate_only=True)

1821

1321

1822

1322

del notifychangeproperty

1823

1323

1824

1324

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

1825

1325

try:

1826

1326

self.remove_from_connection()

1829

1329

if hasattr(DBusObjectWithProperties, "__del__"):

1830

1330

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

1831

1331

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

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:

1332

1333

def checker_callback(self, pid, condition, command,

1334

*args, **kwargs):

1335

self.checker_callback_tag = None

1336

self.checker = None

1337

if os.WIFEXITED(condition):

1338

exitstatus = os.WEXITSTATUS(condition)

1840

1339

# Emit D-Bus signal

1841

1340

self.CheckerCompleted(dbus.Int16(exitstatus),

1842

# This is specific to GNU libC

1843

dbus.Int64(exitstatus << 8),

1341

dbus.Int64(condition),

1844

1342

dbus.String(command))

1845

1343

else:

1846

1344

# Emit D-Bus signal

1847

1345

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

1848

dbus.Int64(

1849

# This is specific to GNU libC

1850

(exitstatus << 8)

1851

| self.last_checker_signal),

1346

dbus.Int64(condition),

1852

1347

dbus.String(command))

1853

return ret

1854

1348

1349

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

1350

*args, **kwargs)

1351

1855

1352

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

1856

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

1353

old_checker = self.checker

1354

if self.checker is not None:

1355

old_checker_pid = self.checker.pid

1356

else:

1357

old_checker_pid = None

1857

1358

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

1858

1359

# Only if new checker process was started

1859

1360

if (self.checker is not None

1861

1362

# Emit D-Bus signal

1862

1363

self.CheckerStarted(self.current_checker_command)

1863

1364

return r

1864

1365

1865

1366

def _reset_approved(self):

1866

1367

self.approved = None

1867

1368

return False

1868

1369

1869

1370

def approve(self, value=True):

1870

1371

self.approved = value

1871

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

1872

* 1000), self._reset_approved)

1372

gobject.timeout_add(timedelta_to_milliseconds

1373

(self.approval_duration),

1374

self._reset_approved)

1873

1375

self.send_changedstate()

1874

1875

# D-Bus methods, signals & properties

1876

1877

# Interfaces

1878

1879

# Signals

1880

1376

1377

## D-Bus methods, signals & properties

1378

_interface = "se.recompile.Mandos.Client"

1379

1380

## Interfaces

1381

1382

@dbus_interface_annotations(_interface)

1383

def _foo(self):

1384

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

1385

"false"}

1386

1387

## Signals

1388

1881

1389

# CheckerCompleted - signal

1882

1390

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

1883

1391

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

1884

1392

"D-Bus signal"

1885

1393

pass

1886

1394

1887

1395

# CheckerStarted - signal

1888

1396

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

1889

1397

def CheckerStarted(self, command):

1890

1398

"D-Bus signal"

1891

1399

pass

1892

1400

1893

1401

# PropertyChanged - signal

1894

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

1895

1402

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

1896

1403

def PropertyChanged(self, property, value):

1897

1404

"D-Bus signal"

1898

1405

pass

1899

1406

1900

1407

# GotSecret - signal

1901

1408

@dbus.service.signal(_interface)

1902

1409

def GotSecret(self):

1905

1412

server to mandos-client

1906

1413

"""

1907

1414

pass

1908

1415

1909

1416

# Rejected - signal

1910

1417

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

1911

1418

def Rejected(self, reason):

1912

1419

"D-Bus signal"

1913

1420

pass

1914

1421

1915

1422

# NeedApproval - signal

1916

1423

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

1917

1424

def NeedApproval(self, timeout, default):

1918

1425

"D-Bus signal"

1919

1426

return self.need_approval()

1920

1921

# Methods

1922

1427

1428

## Methods

1429

1923

1430

# Approve - method

1924

1431

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

1925

1432

def Approve(self, value):

1926

1433

self.approve(value)

1927

1434

1928

1435

# CheckedOK - method

1929

1436

@dbus.service.method(_interface)

1930

1437

def CheckedOK(self):

1931

1438

self.checked_ok()

1932

1439

1933

1440

# Enable - method

1934

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

1935

1441

@dbus.service.method(_interface)

1936

1442

def Enable(self):

1937

1443

"D-Bus method"

1938

1444

self.enable()

1939

1445

1940

1446

# StartChecker - method

1941

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

1942

1447

@dbus.service.method(_interface)

1943

1448

def StartChecker(self):

1944

1449

"D-Bus method"

1945

1450

self.start_checker()

1946

1451

1947

1452

# Disable - method

1948

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

1949

1453

@dbus.service.method(_interface)

1950

1454

def Disable(self):

1951

1455

"D-Bus method"

1952

1456

self.disable()

1953

1457

1954

1458

# StopChecker - method

1955

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

1956

1459

@dbus.service.method(_interface)

1957

1460

def StopChecker(self):

1958

1461

self.stop_checker()

1959

1960

# Properties

1961

1462

1463

## Properties

1464

1962

1465

# ApprovalPending - property

1963

1466

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

1964

1467

def ApprovalPending_dbus_property(self):

1965

1468

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

1966

1469

1967

1470

# ApprovedByDefault - property

1968

@dbus_service_property(_interface,

1969

signature="b",

1471

@dbus_service_property(_interface, signature="b",

1970

1472

access="readwrite")

1971

1473

def ApprovedByDefault_dbus_property(self, value=None):

1972

1474

if value is None: # get

1973

1475

return dbus.Boolean(self.approved_by_default)

1974

1476

self.approved_by_default = bool(value)

1975

1477

1976

1478

# ApprovalDelay - property

1977

@dbus_service_property(_interface,

1978

signature="t",

1479

@dbus_service_property(_interface, signature="t",

1979

1480

access="readwrite")

1980

1481

def ApprovalDelay_dbus_property(self, value=None):

1981

1482

if value is None: # get

1982

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

1983

* 1000)

1483

return dbus.UInt64(self.approval_delay_milliseconds())

1984

1484

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

1985

1485

1986

1486

# ApprovalDuration - property

1987

@dbus_service_property(_interface,

1988

signature="t",

1487

@dbus_service_property(_interface, signature="t",

1989

1488

access="readwrite")

1990

1489

def ApprovalDuration_dbus_property(self, value=None):

1991

1490

if value is None: # get

1992

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

1993

* 1000)

1491

return dbus.UInt64(timedelta_to_milliseconds(

1492

self.approval_duration))

1994

1493

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

1995

1494

1996

1495

# Name - property

1997

@dbus_annotations(

1998

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

1999

1496

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

2000

1497

def Name_dbus_property(self):

2001

1498

return dbus.String(self.name)

2002

1499

2003

1500

# Fingerprint - property

2004

@dbus_annotations(

2005

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

2006

1501

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

2007

1502

def Fingerprint_dbus_property(self):

2008

1503

return dbus.String(self.fingerprint)

2009

1504

2010

1505

# Host - property

2011

@dbus_service_property(_interface,

2012

signature="s",

1506

@dbus_service_property(_interface, signature="s",

2013

1507

access="readwrite")

2014

1508

def Host_dbus_property(self, value=None):

2015

1509

if value is None: # get

2016

1510

return dbus.String(self.host)

2017

self.host = str(value)

2018

1511

self.host = unicode(value)

1512

2019

1513

# Created - property

2020

@dbus_annotations(

2021

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

2022

1514

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

2023

1515

def Created_dbus_property(self):

2024

1516

return datetime_to_dbus(self.created)

2025

1517

2026

1518

# LastEnabled - property

2027

1519

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

2028

1520

def LastEnabled_dbus_property(self):

2029

1521

return datetime_to_dbus(self.last_enabled)

2030

1522

2031

1523

# Enabled - property

2032

@dbus_service_property(_interface,

2033

signature="b",

1524

@dbus_service_property(_interface, signature="b",

2034

1525

access="readwrite")

2035

1526

def Enabled_dbus_property(self, value=None):

2036

1527

if value is None: # get

2039

1530

self.enable()

2040

1531

else:

2041

1532

self.disable()

2042

1533

2043

1534

# LastCheckedOK - property

2044

@dbus_service_property(_interface,

2045

signature="s",

1535

@dbus_service_property(_interface, signature="s",

2046

1536

access="readwrite")

2047

1537

def LastCheckedOK_dbus_property(self, value=None):

2048

1538

if value is not None:

2049

1539

self.checked_ok()

2050

1540

return

2051

1541

return datetime_to_dbus(self.last_checked_ok)

2052

1542

2053

1543

# LastCheckerStatus - property

2054

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

1544

@dbus_service_property(_interface, signature="n",

1545

access="read")

2055

1546

def LastCheckerStatus_dbus_property(self):

2056

1547

return dbus.Int16(self.last_checker_status)

2057

1548

2058

1549

# Expires - property

2059

1550

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

2060

1551

def Expires_dbus_property(self):

2061

1552

return datetime_to_dbus(self.expires)

2062

1553

2063

1554

# LastApprovalRequest - property

2064

1555

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

2065

1556

def LastApprovalRequest_dbus_property(self):

2066

1557

return datetime_to_dbus(self.last_approval_request)

2067

1558

2068

1559

# Timeout - property

2069

@dbus_service_property(_interface,

2070

signature="t",

1560

@dbus_service_property(_interface, signature="t",

2071

1561

access="readwrite")

2072

1562

def Timeout_dbus_property(self, value=None):

2073

1563

if value is None: # get

2074

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

1564

return dbus.UInt64(self.timeout_milliseconds())

2075

1565

old_timeout = self.timeout

2076

1566

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

2077

1567

# Reschedule disabling

2085

1575

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

2086

1576

is None):

2087

1577

return

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

1578

gobject.source_remove(self.disable_initiator_tag)

1579

self.disable_initiator_tag = (

1580

gobject.timeout_add(

1581

timedelta_to_milliseconds(self.expires - now),

1582

self.disable))

1583

2093

1584

# ExtendedTimeout - property

2094

@dbus_service_property(_interface,

2095

signature="t",

1585

@dbus_service_property(_interface, signature="t",

2096

1586

access="readwrite")

2097

1587

def ExtendedTimeout_dbus_property(self, value=None):

2098

1588

if value is None: # get

2099

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

2100

* 1000)

1589

return dbus.UInt64(self.extended_timeout_milliseconds())

2101

1590

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

2102

1591

2103

1592

# Interval - property

2104

@dbus_service_property(_interface,

2105

signature="t",

1593

@dbus_service_property(_interface, signature="t",

2106

1594

access="readwrite")

2107

1595

def Interval_dbus_property(self, value=None):

2108

1596

if value is None: # get

2109

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

1597

return dbus.UInt64(self.interval_milliseconds())

2110

1598

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

2111

1599

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

2112

1600

return

2113

1601

if self.enabled:

2114

1602

# Reschedule checker run

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

1603

gobject.source_remove(self.checker_initiator_tag)

1604

self.checker_initiator_tag = (gobject.timeout_add

1605

(value, self.start_checker))

1606

self.start_checker() # Start one now, too

1607

2120

1608

# Checker - property

2121

@dbus_service_property(_interface,

2122

signature="s",

1609

@dbus_service_property(_interface, signature="s",

2123

1610

access="readwrite")

2124

1611

def Checker_dbus_property(self, value=None):

2125

1612

if value is None: # get

2126

1613

return dbus.String(self.checker_command)

2127

self.checker_command = str(value)

2128

1614

self.checker_command = unicode(value)

1615

2129

1616

# CheckerRunning - property

2130

@dbus_service_property(_interface,

2131

signature="b",

1617

@dbus_service_property(_interface, signature="b",

2132

1618

access="readwrite")

2133

1619

def CheckerRunning_dbus_property(self, value=None):

2134

1620

if value is None: # get

2137

1623

self.start_checker()

2138

1624

else:

2139

1625

self.stop_checker()

2140

1626

2141

1627

# ObjectPath - property

2142

@dbus_annotations(

2143

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

2144

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

2145

1628

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

2146

1629

def ObjectPath_dbus_property(self):

2147

return self.dbus_object_path # is already a dbus.ObjectPath

2148

1630

return self.dbus_object_path # is already a dbus.ObjectPath

1631

2149

1632

# Secret = property

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

@dbus_service_property(_interface, signature="ay",

1634

access="write", byte_arrays=True)

2157

1635

def Secret_dbus_property(self, value):

2158

self.secret = bytes(value)

2159

1636

self.secret = str(value)

1637

2160

1638

del _interface

2161

1639

2162

1640

2165

1643

self._pipe = child_pipe

2166

1644

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

2167

1645

if not self._pipe.recv():

2168

raise KeyError(fpr)

2169

1646

raise KeyError()

1647

2170

1648

def __getattribute__(self, name):

2171

1649

if name == '_pipe':

2172

1650

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

2175

1653

if data[0] == 'data':

2176

1654

return data[1]

2177

1655

if data[0] == 'function':

2178

2179

1656

def func(*args, **kwargs):

2180

1657

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

2181

1658

return self._pipe.recv()[1]

2182

2183

1659

return func

2184

1660

2185

1661

def __setattr__(self, name, value):

2186

1662

if name == '_pipe':

2187

1663

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

2190

1666

2191

1667

class ClientHandler(socketserver.BaseRequestHandler, object):

2192

1668

"""A class to handle client connections.

2193

1669

2194

1670

Instantiated once for each connection to handle it.

2195

1671

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

2196

1672

2197

1673

def handle(self):

2198

1674

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

2199

1675

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

2200

str(self.client_address))

1676

unicode(self.client_address))

2201

1677

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

2202

1678

self.server.child_pipe.fileno())

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"))

1679

1680

session = (gnutls.connection

1681

.ClientSession(self.request,

1682

gnutls.connection

1683

.X509Credentials()))

1684

1685

# Note: gnutls.connection.X509Credentials is really a

1686

# generic GnuTLS certificate credentials object so long as

1687

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

1688

# here despite using OpenPGP certificates.

1689

1690

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

1691

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

1692

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

1693

# "+DHE-DSS"))

2210

1694

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

2211

1695

priority = self.server.gnutls_priority

2212

1696

if priority is None:

2213

1697

priority = "NORMAL"

2214

gnutls.priority_set_direct(session._c_object,

2215

priority.encode("utf-8"),

2216

None)

2217

1698

(gnutls.library.functions

1699

.gnutls_priority_set_direct(session._c_object,

1700

priority, None))

1701

2218

1702

# Start communication using the Mandos protocol

2219

1703

# Get protocol number

2220

1704

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

2225

1709

except (ValueError, IndexError, RuntimeError) as error:

2226

1710

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

2227

1711

return

2228

1712

2229

1713

# Start GnuTLS connection

2230

1714

try:

2231

1715

session.handshake()

2232

except gnutls.Error as error:

1716

except gnutls.errors.GNUTLSError as error:

2233

1717

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

2234

1718

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

2235

1719

# established. Just abandon the request.

2236

1720

return

2237

1721

logger.debug("Handshake succeeded")

2238

1722

2239

1723

approval_required = False

2240

1724

try:

2241

1725

try:

2242

fpr = self.fingerprint(

2243

self.peer_certificate(session))

2244

except (TypeError, gnutls.Error) as error:

1726

fpr = self.fingerprint(self.peer_certificate

1727

(session))

1728

except (TypeError,

1729

gnutls.errors.GNUTLSError) as error:

2245

1730

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

2246

1731

return

2247

1732

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

2248

1733

2249

1734

try:

2250

1735

client = ProxyClient(child_pipe, fpr,

2251

1736

self.client_address)

2252

1737

except KeyError:

2253

1738

return

2254

1739

2255

1740

if client.approval_delay:

2256

1741

delay = client.approval_delay

2257

1742

client.approvals_pending += 1

2258

1743

approval_required = True

2259

1744

2260

1745

while True:

2261

1746

if not client.enabled:

2262

1747

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

2263

client.name)

1748

client.name)

2264

1749

if self.server.use_dbus:

2265

1750

# Emit D-Bus signal

2266

1751

client.Rejected("Disabled")

2267

1752

return

2268

1753

2269

1754

if client.approved or not client.approval_delay:

2270

# We are approved or approval is disabled

1755

#We are approved or approval is disabled

2271

1756

break

2272

1757

elif client.approved is None:

2273

1758

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

2275

1760

if self.server.use_dbus:

2276

1761

# Emit D-Bus signal

2277

1762

client.NeedApproval(

2278

client.approval_delay.total_seconds()

2279

* 1000, client.approved_by_default)

1763

client.approval_delay_milliseconds(),

1764

client.approved_by_default)

2280

1765

else:

2281

1766

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

2282

1767

client.name)

2284

1769

# Emit D-Bus signal

2285

1770

client.Rejected("Denied")

2286

1771

return

2287

2288

# wait until timeout or approved

1772

1773

#wait until timeout or approved

2289

1774

time = datetime.datetime.now()

2290

1775

client.changedstate.acquire()

2291

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

1776

client.changedstate.wait(

1777

float(timedelta_to_milliseconds(delay)

1778

/ 1000))

2292

1779

client.changedstate.release()

2293

1780

time2 = datetime.datetime.now()

2294

1781

if (time2 - time) >= delay:

2304

1791

break

2305

1792

else:

2306

1793

delay -= time2 - time

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

1794

1795

sent_size = 0

1796

while sent_size < len(client.secret):

1797

try:

1798

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

1799

except gnutls.errors.GNUTLSError as error:

1800

logger.warning("gnutls send failed",

1801

exc_info=error)

1802

return

1803

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

1804

sent, len(client.secret)

1805

- (sent_size + sent))

1806

sent_size += sent

1807

2315

1808

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

2316

1809

# bump the timeout using extended_timeout

2317

1810

client.bump_timeout(client.extended_timeout)

2318

1811

if self.server.use_dbus:

2319

1812

# Emit D-Bus signal

2320

1813

client.GotSecret()

2321

1814

2322

1815

finally:

2323

1816

if approval_required:

2324

1817

client.approvals_pending -= 1

2325

1818

try:

2326

1819

session.bye()

2327

except gnutls.Error as error:

1820

except gnutls.errors.GNUTLSError as error:

2328

1821

logger.warning("GnuTLS bye failed",

2329

1822

exc_info=error)

2330

1823

2331

1824

@staticmethod

2332

1825

def peer_certificate(session):

2333

1826

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

2334

1827

# If not an OpenPGP certificate...

2335

if (gnutls.certificate_type_get(session._c_object)

2336

!= gnutls.CRT_OPENPGP):

2337

# ...return invalid data

2338

return b""

1828

if (gnutls.library.functions

1829

.gnutls_certificate_type_get(session._c_object)

1830

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1831

# ...do the normal thing

1832

return session.peer_certificate

2339

1833

list_size = ctypes.c_uint(1)

2340

cert_list = (gnutls.certificate_get_peers

1834

cert_list = (gnutls.library.functions

1835

.gnutls_certificate_get_peers

2341

1836

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

2342

1837

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

2343

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

1838

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

1839

" certificate")

2344

1840

if list_size.value == 0:

2345

1841

return None

2346

1842

cert = cert_list[0]

2347

1843

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

2348

1844

2349

1845

@staticmethod

2350

1846

def fingerprint(openpgp):

2351

1847

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2352

1848

# New GnuTLS "datum" with the OpenPGP public key

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)))

1849

datum = (gnutls.library.types

1850

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

1851

ctypes.POINTER

1852

(ctypes.c_ubyte)),

1853

ctypes.c_uint(len(openpgp))))

2357

1854

# New empty GnuTLS certificate

2358

crt = gnutls.openpgp_crt_t()

2359

gnutls.openpgp_crt_init(ctypes.byref(crt))

1855

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2360

1858

# Import the OpenPGP public key into the certificate

2361

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

2362

gnutls.OPENPGP_FMT_RAW)

1859

(gnutls.library.functions

1860

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

1861

gnutls.library.constants

1862

.GNUTLS_OPENPGP_FMT_RAW))

2363

1863

# Verify the self signature in the key

2364

1864

crtverify = ctypes.c_uint()

2365

gnutls.openpgp_crt_verify_self(crt, 0,

2366

ctypes.byref(crtverify))

1865

(gnutls.library.functions

1866

.gnutls_openpgp_crt_verify_self(crt, 0,

1867

ctypes.byref(crtverify)))

2367

1868

if crtverify.value != 0:

2368

gnutls.openpgp_crt_deinit(crt)

2369

raise gnutls.CertificateSecurityError("Verify failed")

1869

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1870

raise (gnutls.errors.CertificateSecurityError

1871

("Verify failed"))

2370

1872

# New buffer for the fingerprint

2371

1873

buf = ctypes.create_string_buffer(20)

2372

1874

buf_len = ctypes.c_size_t()

2373

1875

# Get the fingerprint from the certificate into the buffer

2374

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

2375

ctypes.byref(buf_len))

1876

(gnutls.library.functions

1877

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

1878

ctypes.byref(buf_len)))

2376

1879

# Deinit the certificate

2377

gnutls.openpgp_crt_deinit(crt)

1880

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2378

1881

# Convert the buffer to a Python bytestring

2379

1882

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

2380

1883

# Convert the bytestring to hexadecimal notation

2384

1887

2385

1888

class MultiprocessingMixIn(object):

2386

1889

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

2387

2388

1890

def sub_process_main(self, request, address):

2389

1891

try:

2390

1892

self.finish_request(request, address)

2391

1893

except Exception:

2392

1894

self.handle_error(request, address)

2393

1895

self.close_request(request)

2394

1896

2395

1897

def process_request(self, request, address):

2396

1898

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

2397

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

2398

args=(request, address))

1899

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

1900

args = (request, address))

2399

1901

proc.start()

2400

1902

return proc

2401

1903

2402

1904

2403

1905

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2404

1906

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

2405

2406

1907

def process_request(self, request, client_address):

2407

1908

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

2408

1909

2409

1910

This function creates a new pipe in self.pipe

2410

1911

"""

2411

1912

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2412

1913

2413

1914

proc = MultiprocessingMixIn.process_request(self, request,

2414

1915

client_address)

2415

1916

self.child_pipe.close()

2416

1917

self.add_pipe(parent_pipe, proc)

2417

1918

2418

1919

def add_pipe(self, parent_pipe, proc):

2419

1920

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

2420

1921

raise NotImplementedError()

2423

1924

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2424

1925

socketserver.TCPServer, object):

2425

1926

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

2426

1927

2427

1928

Attributes:

2428

1929

enabled: Boolean; whether this server is activated yet

2429

1930

interface: None or a network interface name (string)

2430

1931

use_ipv6: Boolean; to use IPv6 or not

2431

1932

"""

2432

2433

1933

def __init__(self, server_address, RequestHandlerClass,

2434

interface=None,

2435

use_ipv6=True,

2436

socketfd=None):

1934

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

2437

1935

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

2438

1936

creating a new one with socket.socket().

2439

1937

"""

2445

1943

self.socketfd = socketfd

2446

1944

# Save the original socket.socket() function

2447

1945

self.socket_socket = socket.socket

2448

2449

1946

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

2450

#

1947

#

2451

1948

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

2452

1949

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

2453

1950

# patching socket.socket.)

2454

#

1951

#

2455

1952

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

2456

1953

@functools.wraps(socket.socket)

2457

1954

def socket_wrapper(*args, **kwargs):

2469

1966

# socket_wrapper(), if socketfd was set.

2470

1967

socketserver.TCPServer.__init__(self, server_address,

2471

1968

RequestHandlerClass)

2472

1969

2473

1970

def server_bind(self):

2474

1971

"""This overrides the normal server_bind() function

2475

1972

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

2476

1973

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

2477

global SO_BINDTODEVICE

2478

1974

if self.interface is not None:

2479

1975

if SO_BINDTODEVICE is None:

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

1976

logger.error("SO_BINDTODEVICE does not exist;"

1977

" cannot bind to interface %s",

1978

self.interface)

1979

else:

1980

try:

1981

self.socket.setsockopt(socket.SOL_SOCKET,

1982

SO_BINDTODEVICE,

1983

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

1984

except socket.error as error:

1985

if error.errno == errno.EPERM:

1986

logger.error("No permission to bind to"

1987

" interface %s", self.interface)

1988

elif error.errno == errno.ENOPROTOOPT:

1989

logger.error("SO_BINDTODEVICE not available;"

1990

" cannot bind to interface %s",

1991

self.interface)

1992

elif error.errno == errno.ENODEV:

1993

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

1994

" cannot bind", self.interface)

1995

else:

1996

raise

2501

1997

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

2502

1998

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

2503

1999

if not self.server_address[0]:

2504

2000

if self.address_family == socket.AF_INET6:

2505

any_address = "::" # in6addr_any

2001

any_address = "::" # in6addr_any

2506

2002

else:

2507

any_address = "0.0.0.0" # INADDR_ANY

2003

any_address = "0.0.0.0" # INADDR_ANY

2508

2004

self.server_address = (any_address,

2509

2005

self.server_address[1])

2510

2006

elif not self.server_address[1]:

2511

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

2007

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

2008

0)

2512

2009

# if self.interface:

2513

2010

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

2514

2011

# 0, # port

2520

2017

2521

2018

class MandosServer(IPv6_TCPServer):

2522

2019

"""Mandos server.

2523

2020

2524

2021

Attributes:

2525

2022

clients: set of Client objects

2526

2023

gnutls_priority GnuTLS priority string

2527

2024

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

2528

2529

Assumes a GLib.MainLoop event loop.

2025

2026

Assumes a gobject.MainLoop event loop.

2530

2027

"""

2531

2532

2028

def __init__(self, server_address, RequestHandlerClass,

2533

interface=None,

2534

use_ipv6=True,

2535

clients=None,

2536

gnutls_priority=None,

2537

use_dbus=True,

2538

socketfd=None):

2029

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

2030

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

2539

2031

self.enabled = False

2540

2032

self.clients = clients

2541

2033

if self.clients is None:

2544

2036

self.gnutls_priority = gnutls_priority

2545

2037

IPv6_TCPServer.__init__(self, server_address,

2546

2038

RequestHandlerClass,

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2039

interface = interface,

2040

use_ipv6 = use_ipv6,

2041

socketfd = socketfd)

2551

2042

def server_activate(self):

2552

2043

if self.enabled:

2553

2044

return socketserver.TCPServer.server_activate(self)

2554

2045

2555

2046

def enable(self):

2556

2047

self.enabled = True

2557

2048

2558

2049

def add_pipe(self, parent_pipe, proc):

2559

2050

# Call "handle_ipc" for both data and EOF events

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):

2051

gobject.io_add_watch(parent_pipe.fileno(),

2052

gobject.IO_IN | gobject.IO_HUP,

2053

functools.partial(self.handle_ipc,

2054

parent_pipe =

2055

parent_pipe,

2056

proc = proc))

2057

2058

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

2059

proc = None, client_object=None):

2571

2060

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

2572

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

2061

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

2573

2062

# Wait for other process to exit

2574

2063

proc.join()

2575

2064

return False

2576

2065

2577

2066

# Read a request from the child

2578

2067

request = parent_pipe.recv()

2579

2068

command = request[0]

2580

2069

2581

2070

if command == 'init':

2582

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

2071

fpr = request[1]

2583

2072

address = request[2]

2584

2585

for c in self.clients.values():

2073

2074

for c in self.clients.itervalues():

2586

2075

if c.fingerprint == fpr:

2587

2076

client = c

2588

2077

break

2595

2084

address[0])

2596

2085

parent_pipe.send(False)

2597

2086

return False

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))

2087

2088

gobject.io_add_watch(parent_pipe.fileno(),

2089

gobject.IO_IN | gobject.IO_HUP,

2090

functools.partial(self.handle_ipc,

2091

parent_pipe =

2092

parent_pipe,

2093

proc = proc,

2094

client_object =

2095

client))

2606

2096

parent_pipe.send(True)

2607

2097

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

2608

2098

# same fileno

2611

2101

funcname = request[1]

2612

2102

args = request[2]

2613

2103

kwargs = request[3]

2614

2104

2615

2105

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

2616

2106

funcname)(*args,

2617

**kwargs)))

2618

2107

**kwargs)))

2108

2619

2109

if command == 'getattr':

2620

2110

attrname = request[1]

2621

if isinstance(client_object.__getattribute__(attrname),

2622

collections.Callable):

2623

parent_pipe.send(('function', ))

2111

if callable(client_object.__getattribute__(attrname)):

2112

parent_pipe.send(('function',))

2624

2113

else:

2625

parent_pipe.send((

2626

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

2627

2114

parent_pipe.send(('data', client_object

2115

.__getattribute__(attrname)))

2116

2628

2117

if command == 'setattr':

2629

2118

attrname = request[1]

2630

2119

value = request[2]

2631

2120

setattr(client_object, attrname, value)

2632

2121

2633

2122

return True

2634

2123

2635

2124

2636

2125

def rfc3339_duration_to_delta(duration):

2637

2126

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

2638

2127

2639

2128

>>> rfc3339_duration_to_delta("P7D")

2640

2129

datetime.timedelta(7)

2641

2130

>>> rfc3339_duration_to_delta("PT60S")

2651

2140

>>> rfc3339_duration_to_delta("P1DT3M20S")

2652

2141

datetime.timedelta(1, 200)

2653

2142

"""

2654

2143

2655

2144

# Parsing an RFC 3339 duration with regular expressions is not

2656

2145

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

2657

2146

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

2658

2147

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

2659

2148

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

2660

2149

# avoid excessive use of external libraries.

2661

2150

2662

2151

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

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

2152

Token = collections.namedtuple("Token",

2153

("regexp", # To match token; if

2154

# "value" is not None,

2155

# must have a "group"

2156

# containing digits

2157

"value", # datetime.timedelta or

2158

# None

2159

"followers")) # Tokens valid after

2160

# this token

2668

2161

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

2669

2162

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

2670

2163

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

2671

2164

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

2672

2165

datetime.timedelta(seconds=1),

2673

frozenset((token_end, )))

2166

frozenset((token_end,)))

2674

2167

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

2675

2168

datetime.timedelta(minutes=1),

2676

2169

frozenset((token_second, token_end)))

2692

2185

frozenset((token_month, token_end)))

2693

2186

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

2694

2187

datetime.timedelta(weeks=1),

2695

frozenset((token_end, )))

2188

frozenset((token_end,)))

2696

2189

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

2697

2190

frozenset((token_year, token_month,

2698

2191

token_day, token_time,

2699

token_week)))

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2192

token_week))),

2193

# Define starting values

2194

value = datetime.timedelta() # Value so far

2703

2195

found_token = None

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2196

followers = frozenset(token_duration,) # Following valid tokens

2197

s = duration # String left to parse

2708

2198

# Loop until end token is found

2709

2199

while found_token is not token_end:

2710

2200

# Search for any currently valid tokens

2726

2216

break

2727

2217

else:

2728

2218

# No currently valid tokens were found

2729

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

2730

.format(duration))

2219

raise ValueError("Invalid RFC 3339 duration")

2731

2220

# End token found

2732

2221

return value

2733

2222

2734

2223

2735

2224

def string_to_delta(interval):

2736

2225

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

2737

2226

2738

2227

>>> string_to_delta('7d')

2739

2228

datetime.timedelta(7)

2740

2229

>>> string_to_delta('60s')

2748

2237

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

2749

2238

datetime.timedelta(0, 330)

2750

2239

"""

2751

2240

2752

2241

try:

2753

2242

return rfc3339_duration_to_delta(interval)

2754

2243

except ValueError:

2755

2244

pass

2756

2245

2757

2246

timevalue = datetime.timedelta(0)

2758

2247

for s in interval.split():

2759

2248

try:

2760

suffix = s[-1]

2249

suffix = unicode(s[-1])

2761

2250

value = int(s[:-1])

2762

2251

if suffix == "d":

2763

2252

delta = datetime.timedelta(value)

2770

2259

elif suffix == "w":

2771

2260

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

2772

2261

else:

2773

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

2262

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

2263

.format(suffix))

2774

2264

except IndexError as e:

2775

2265

raise ValueError(*(e.args))

2776

2266

timevalue += delta

2777

2267

return timevalue

2778

2268

2779

2269

2780

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

2270

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

2781

2271

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

2782

2272

2783

2273

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

2784

2274

if os.fork():

2785

2275

sys.exit()

2793

2283

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

2794

2284

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

2795

2285

raise OSError(errno.ENODEV,

2796

"{} not a character device"

2286

"{0} not a character device"

2797

2287

.format(os.devnull))

2798

2288

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

2799

2289

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

2803

2293

2804

2294

2805

2295

def main():

2806

2296

2807

2297

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

2808

2298

# Parsing of options, both command line and config file

2809

2299

2810

2300

parser = argparse.ArgumentParser()

2811

2301

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

2812

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

2302

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

2813

2303

help="show version number and exit")

2814

2304

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

2815

2305

help="Bind to interface IF")

2848

2338

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

2849

2339

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

2850

2340

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

2851

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

2852

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

2853

default=None)

2854

2341

2855

2342

options = parser.parse_args()

2856

2343

2857

2344

if options.check:

2858

2345

import doctest

2859

2346

fail_count, test_count = doctest.testmod()

2860

2347

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

2861

2348

2862

2349

# Default values for config file for server-global settings

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

2350

server_defaults = { "interface": "",

2351

"address": "",

2352

"port": "",

2353

"debug": "False",

2354

"priority":

2355

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

2356

"servicename": "Mandos",

2357

"use_dbus": "True",

2358

"use_ipv6": "True",

2359

"debuglevel": "",

2360

"restore": "True",

2361

"socket": "",

2362

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

2363

"foreground": "False",

2364

}

2365

2881

2366

# Parse config file for server-global settings

2882

2367

server_config = configparser.SafeConfigParser(server_defaults)

2883

2368

del server_defaults

2884

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

2369

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

2370

"mandos.conf"))

2885

2371

# Convert the SafeConfigParser object to a dict

2886

2372

server_settings = server_config.defaults()

2887

2373

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

2888

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

2889

"foreground", "zeroconf"):

2374

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

2890

2375

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

2891

2376

option)

2892

2377

if server_settings["port"]:

2902

2387

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

2903

2388

["socket"])

2904

2389

del server_config

2905

2390

2906

2391

# Override the settings from the config file with command line

2907

2392

# options, if set.

2908

2393

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

2909

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

2910

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

2911

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

2394

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

2395

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

2396

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

2912

2397

value = getattr(options, option)

2913

2398

if value is not None:

2914

2399

server_settings[option] = value

2915

2400

del options

2916

2401

# Force all strings to be unicode

2917

2402

for option in server_settings.keys():

2918

if isinstance(server_settings[option], bytes):

2919

server_settings[option] = (server_settings[option]

2920

.decode("utf-8"))

2403

if type(server_settings[option]) is str:

2404

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

2921

2405

# Force all boolean options to be boolean

2922

2406

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

2923

"foreground", "zeroconf"):

2407

"foreground"):

2924

2408

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

2925

2409

# Debug implies foreground

2926

2410

if server_settings["debug"]:

2927

2411

server_settings["foreground"] = True

2928

2412

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

2929

2413

2930

2414

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

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

2415

2937

2416

# For convenience

2938

2417

debug = server_settings["debug"]

2939

2418

debuglevel = server_settings["debuglevel"]

2942

2421

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

2943

2422

stored_state_file)

2944

2423

foreground = server_settings["foreground"]

2945

zeroconf = server_settings["zeroconf"]

2946

2424

2947

2425

if debug:

2948

2426

initlogger(debug, logging.DEBUG)

2949

2427

else:

2952

2430

else:

2953

2431

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

2954

2432

initlogger(debug, level)

2955

2433

2956

2434

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

2957

syslogger.setFormatter(

2958

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

2959

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

2960

server_settings["servicename"])))

2961

2435

syslogger.setFormatter(logging.Formatter

2436

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

2437

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

2438

.format(server_settings

2439

["servicename"])))

2440

2962

2441

# Parse config file with clients

2963

2442

client_config = configparser.SafeConfigParser(Client

2964

2443

.client_defaults)

2965

2444

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

2966

2445

"clients.conf"))

2967

2446

2968

2447

global mandos_dbus_service

2969

2448

mandos_dbus_service = 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)

2449

2450

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

2451

server_settings["port"]),

2452

ClientHandler,

2453

interface=(server_settings["interface"]

2454

or None),

2455

use_ipv6=use_ipv6,

2456

gnutls_priority=

2457

server_settings["priority"],

2458

use_dbus=use_dbus,

2459

socketfd=(server_settings["socket"]

2460

or None))

2982

2461

if not foreground:

2983

2462

pidfilename = "/run/mandos.pid"

2984

2463

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

2985

2464

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

2986

2465

pidfile = None

2987

2466

try:

2988

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

2467

pidfile = open(pidfilename, "w")

2989

2468

except IOError as e:

2990

2469

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

2991

2470

exc_info=e)

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2471

2472

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

2996

2473

try:

2997

2474

uid = pwd.getpwnam(name).pw_uid

2998

gid = pwd.getpwnam(group).pw_gid

2475

gid = pwd.getpwnam(name).pw_gid

2999

2476

break

3000

2477

except KeyError:

3001

2478

continue

3005

2482

try:

3006

2483

os.setgid(gid)

3007

2484

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

3011

2485

except OSError as error:

3012

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

3013

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

3014

2486

if error.errno != errno.EPERM:

3015

2487

raise

3016

2488

3017

2489

if debug:

3018

2490

# Enable all possible GnuTLS debugging

3019

2491

3020

2492

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

3021

2493

# - GnuTLS manual

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2494

gnutls.library.functions.gnutls_global_set_log_level(11)

2495

2496

@gnutls.library.types.gnutls_log_func

3025

2497

def debug_gnutls(level, string):

3026

2498

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

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2499

2500

(gnutls.library.functions

2501

.gnutls_global_set_log_function(debug_gnutls))

2502

3030

2503

# Redirect stdin so all checkers get /dev/null

3031

2504

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

3032

2505

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

3033

2506

if null > 2:

3034

2507

os.close(null)

3035

2508

3036

2509

# Need to fork before connecting to D-Bus

3037

2510

if not foreground:

3038

2511

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

3039

2512

daemon()

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

2513

2514

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

2515

# need to inform gobject that threads will be used.

2516

gobject.threads_init()

2517

3045

2518

global main_loop

3046

2519

# From the Avahi example code

3047

2520

DBusGMainLoop(set_as_default=True)

3048

main_loop = GLib.MainLoop()

2521

main_loop = gobject.MainLoop()

3049

2522

bus = dbus.SystemBus()

3050

2523

# End of Avahi example code

3051

2524

if use_dbus:

3052

2525

try:

3053

2526

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

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:

2527

bus, do_not_queue=True)

2528

old_bus_name = (dbus.service.BusName

2529

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

2530

do_not_queue=True))

2531

except dbus.exceptions.NameExistsException as e:

3060

2532

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

3061

2533

use_dbus = False

3062

2534

server_settings["use_dbus"] = False

3063

2535

tcp_server.use_dbus = False

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

2536

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2537

service = AvahiServiceToSyslog(name =

2538

server_settings["servicename"],

2539

servicetype = "_mandos._tcp",

2540

protocol = protocol, bus = bus)

2541

if server_settings["interface"]:

2542

service.interface = (if_nametoindex

2543

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

2544

3075

2545

global multiprocessing_manager

3076

2546

multiprocessing_manager = multiprocessing.Manager()

3077

2547

3078

2548

client_class = Client

3079

2549

if use_dbus:

3080

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

3081

2550

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

2551

3082

2552

client_settings = Client.config_parser(client_config)

3083

2553

old_client_settings = {}

3084

2554

clients_data = {}

3085

2555

3086

2556

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

3087

2557

global wnull

3088

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

2558

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

3089

2559

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

3090

2560

# mode

3091

2561

if debug or not foreground:

3092

2562

wnull.close()

3093

2563

3094

2564

# Get client data and settings from last running state.

3095

2565

if server_settings["restore"]:

3096

2566

try:

3097

2567

with open(stored_state_path, "rb") as 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

clients_data, old_client_settings = (pickle.load

2569

(stored_state))

3143

2570

os.remove(stored_state_path)

3144

2571

except IOError as e:

3145

2572

if e.errno == errno.ENOENT:

3146

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

3147

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

2573

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

2574

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

3148

2575

else:

3149

2576

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

3150

2577

exc_info=e)

3151

2578

raise

3152

2579

except EOFError as e:

3153

2580

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

3154

"EOFError:",

3155

exc_info=e)

3156

2581

"EOFError:", exc_info=e)

2582

3157

2583

with PGPEngine() as pgp:

3158

for client_name, client in clients_data.items():

2584

for client_name, client in clients_data.iteritems():

3159

2585

# Skip removed clients

3160

2586

if client_name not in client_settings:

3161

2587

continue

3162

2588

3163

2589

# Decide which value to use after restoring saved state.

3164

2590

# We have three different values: Old config file,

3165

2591

# new config file, and saved state.

3170

2596

# For each value in new config, check if it

3171

2597

# differs from the old config value (Except for

3172

2598

# the "secret" attribute)

3173

if (name != "secret"

3174

and (value !=

3175

old_client_settings[client_name][name])):

2599

if (name != "secret" and

2600

value != old_client_settings[client_name]

2601

[name]):

3176

2602

client[name] = value

3177

2603

except KeyError:

3178

2604

pass

3179

2605

3180

2606

# Clients who has passed its expire date can still be

3181

# enabled if its last checker was successful. A Client

2607

# enabled if its last checker was successful. Clients

3182

2608

# whose checker succeeded before we stored its state is

3183

2609

# assumed to have successfully run all checkers during

3184

2610

# downtime.

3186

2612

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

3187

2613

if not client["last_checked_ok"]:

3188

2614

logger.warning(

3189

"disabling client {} - Client never "

3190

"performed a successful checker".format(

3191

client_name))

2615

"disabling client {0} - Client never "

2616

"performed a successful checker"

2617

.format(client_name))

3192

2618

client["enabled"] = False

3193

2619

elif client["last_checker_status"] != 0:

3194

2620

logger.warning(

3195

"disabling client {} - Client last"

3196

" checker failed with error code"

3197

" {}".format(

3198

client_name,

3199

client["last_checker_status"]))

2621

"disabling client {0} - Client "

2622

"last checker failed with error code {1}"

2623

.format(client_name,

2624

client["last_checker_status"]))

3200

2625

client["enabled"] = False

3201

2626

else:

3202

client["expires"] = (

3203

datetime.datetime.utcnow()

3204

+ client["timeout"])

2627

client["expires"] = (datetime.datetime

2628

.utcnow()

2629

+ client["timeout"])

3205

2630

logger.debug("Last checker succeeded,"

3206

" keeping {} enabled".format(

3207

client_name))

2631

" keeping {0} enabled"

2632

.format(client_name))

3208

2633

try:

3209

client["secret"] = pgp.decrypt(

3210

client["encrypted_secret"],

3211

client_settings[client_name]["secret"])

2634

client["secret"] = (

2635

pgp.decrypt(client["encrypted_secret"],

2636

client_settings[client_name]

2637

["secret"]))

3212

2638

except PGPError:

3213

2639

# If decryption fails, we use secret from new settings

3214

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

3215

client_name))

3216

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

3217

["secret"])

3218

2640

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

2641

.format(client_name))

2642

client["secret"] = (

2643

client_settings[client_name]["secret"])

2644

3219

2645

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

3220

2646

for client_name in (set(old_client_settings)

3221

2647

- set(client_settings)):

3223

2649

for client_name in (set(client_settings)

3224

2650

- set(old_client_settings)):

3225

2651

clients_data[client_name] = client_settings[client_name]

3226

2652

3227

2653

# Create all client objects

3228

for client_name, client in clients_data.items():

2654

for client_name, client in clients_data.iteritems():

3229

2655

tcp_server.clients[client_name] = client_class(

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2656

name = client_name, settings = client,

2657

server_settings = server_settings)

2658

3234

2659

if not tcp_server.clients:

3235

2660

logger.warning("No clients defined")

3236

2661

3237

2662

if not foreground:

3238

2663

if pidfile is not None:

3239

pid = os.getpid()

3240

2664

try:

3241

2665

with pidfile:

3242

print(pid, file=pidfile)

2666

pid = os.getpid()

2667

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

3243

2668

except IOError:

3244

2669

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

3245

2670

pidfilename, pid)

3246

2671

del pidfile

3247

2672

del pidfilename

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

2673

2674

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

2675

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

2676

3253

2677

if use_dbus:

3254

3255

@alternate_dbus_interfaces(

3256

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

3257

class MandosDBusService(DBusObjectWithObjectManager):

2678

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

2679

"se.bsnet.fukt.Mandos"})

2680

class MandosDBusService(DBusObjectWithProperties):

3258

2681

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

3259

3260

2682

def __init__(self):

3261

2683

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

3262

3263

2684

_interface = "se.recompile.Mandos"

3264

2685

2686

@dbus_interface_annotations(_interface)

2687

def _foo(self):

2688

return { "org.freedesktop.DBus.Property"

2689

".EmitsChangedSignal":

2690

"false"}

2691

3265

2692

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

3266

2693

def ClientAdded(self, objpath):

3267

2694

"D-Bus signal"

3268

2695

pass

3269

2696

3270

2697

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

3271

2698

def ClientNotFound(self, fingerprint, address):

3272

2699

"D-Bus signal"

3273

2700

pass

3274

3275

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

3276

"true"})

2701

3277

2702

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

3278

2703

def ClientRemoved(self, objpath, name):

3279

2704

"D-Bus signal"

3280

2705

pass

3281

3282

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

3283

"true"})

2706

3284

2707

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

3285

2708

def GetAllClients(self):

3286

2709

"D-Bus method"

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"})

2710

return dbus.Array(c.dbus_object_path

2711

for c in

2712

tcp_server.clients.itervalues())

2713

3292

2714

@dbus.service.method(_interface,

3293

2715

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

3294

2716

def GetAllClientsWithProperties(self):

3295

2717

"D-Bus method"

3296

2718

return dbus.Dictionary(

3297

{c.dbus_object_path: c.GetAll(

3298

"se.recompile.Mandos.Client")

3299

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

2719

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

2720

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

3300

2721

signature="oa{sv}")

3301

2722

3302

2723

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

3303

2724

def RemoveClient(self, object_path):

3304

2725

"D-Bus method"

3305

for c in tcp_server.clients.values():

2726

for c in tcp_server.clients.itervalues():

3306

2727

if c.dbus_object_path == object_path:

3307

2728

del tcp_server.clients[c.name]

3308

2729

c.remove_from_connection()

3309

# Don't signal the disabling

2730

# Don't signal anything except ClientRemoved

3310

2731

c.disable(quiet=True)

3311

# Emit D-Bus signal for removal

3312

self.client_removed_signal(c)

2732

# Emit D-Bus signal

2733

self.ClientRemoved(object_path, c.name)

3313

2734

return

3314

2735

raise KeyError(object_path)

3315

2736

3316

2737

del _interface

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

2738

3354

2739

mandos_dbus_service = MandosDBusService()

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

2740

3361

2741

def cleanup():

3362

2742

"Cleanup function; run on exit"

3363

if zeroconf:

3364

service.cleanup()

3365

3366

mp.active_children()

3367

wn.close()

2743

service.cleanup()

2744

2745

multiprocessing.active_children()

2746

wnull.close()

3368

2747

if not (tcp_server.clients or client_settings):

3369

2748

return

3370

2749

3371

2750

# Store client before exiting. Secrets are encrypted with key

3372

2751

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

3373

2752

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

3374

2753

clients = {}

3375

2754

with PGPEngine() as pgp:

3376

for client in tcp_server.clients.values():

2755

for client in tcp_server.clients.itervalues():

3377

2756

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

3378

2757

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

3379

2758

key)

3380

2759

client_dict = {}

3381

2760

3382

2761

# A list of attributes that can not be pickled

3383

2762

# + secret.

3384

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

3385

"checker", "server_settings"}

3386

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

3387

.Object):

2763

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

2764

"checker", "server_settings"))

2765

for name, typ in (inspect.getmembers

2766

(dbus.service.Object)):

3388

2767

exclude.add(name)

3389

2768

3390

2769

client_dict["encrypted_secret"] = (client

3391

2770

.encrypted_secret)

3392

2771

for attr in client.client_structure:

3393

2772

if attr not in exclude:

3394

2773

client_dict[attr] = getattr(client, attr)

3395

2774

3396

2775

clients[client.name] = client_dict

3397

2776

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

3398

2777

3399

2778

try:

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

2779

with (tempfile.NamedTemporaryFile

2780

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

2781

dir=os.path.dirname(stored_state_path),

2782

delete=False)) as stored_state:

2783

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

2784

tempname=stored_state.name

3409

2785

os.rename(tempname, stored_state_path)

3410

2786

except (IOError, OSError) as e:

3411

2787

if not debug:

3414

2790

except NameError:

3415

2791

pass

3416

2792

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

3417

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

2793

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

3418

2794

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

3419

2795

else:

3420

2796

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

3421

2797

exc_info=e)

3422

2798

raise

3423

2799

3424

2800

# Delete all clients, and settings from config

3425

2801

while tcp_server.clients:

3426

2802

name, client = tcp_server.clients.popitem()

3427

2803

if use_dbus:

3428

2804

client.remove_from_connection()

3429

# Don't signal the disabling

2805

# Don't signal anything except ClientRemoved

3430

2806

client.disable(quiet=True)

3431

# Emit D-Bus signal for removal

3432

2807

if use_dbus:

3433

mandos_dbus_service.client_removed_signal(client)

2808

# Emit D-Bus signal

2809

mandos_dbus_service.ClientRemoved(client

2810

.dbus_object_path,

2811

client.name)

3434

2812

client_settings.clear()

3435

2813

3436

2814

atexit.register(cleanup)

3437

3438

for client in tcp_server.clients.values():

2815

2816

for client in tcp_server.clients.itervalues():

3439

2817

if use_dbus:

3440

# Emit D-Bus signal for adding

3441

mandos_dbus_service.client_added_signal(client)

2818

# Emit D-Bus signal

2819

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3442

2820

# Need to initiate checking of clients

3443

2821

if client.enabled:

3444

2822

client.init_checker()

3445

2823

3446

2824

tcp_server.enable()

3447

2825

tcp_server.server_activate()

3448

2826

3449

2827

# Find out what port we got

3450

if zeroconf:

3451

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

2828

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

3452

2829

if use_ipv6:

3453

2830

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

3454

2831

" flowinfo %d, scope_id %d",

3456

2833

else: # IPv4

3457

2834

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

3458

2835

*tcp_server.socket.getsockname())

3459

3460

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

3461

2836

2837

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

2838

3462

2839

try:

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

2840

# From the Avahi example code

2841

try:

2842

service.activate()

2843

except dbus.exceptions.DBusException as error:

2844

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

2845

cleanup()

2846

sys.exit(1)

2847

# End of Avahi example code

2848

2849

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

2850

lambda *args, **kwargs:

2851

(tcp_server.handle_request

2852

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

2853

3478

2854

logger.debug("Starting main loop")

3479

2855

main_loop.run()

3480

2856

except AvahiError as error:

3489

2865

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

3490

2866

cleanup()

3491

2867

3492

3493

2868

if __name__ == '__main__':

3494

2869

main()