/mandos/trunk : revision 905

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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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#

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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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# 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 this program. If not, see

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

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#

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.2"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.15"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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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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class AvahiError(Exception):

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304

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

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self.value = value

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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

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Used to optionally bind to the specified interface.

252

335

server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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self.name = name

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352

self.type = servicetype

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361

self.server = None

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self.bus = bus

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363

self.entry_group_state_changed_match = None

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def rename(self):

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365

def rename(self, remove=True):

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

277

367

if self.rename_count >= self.max_renames:

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368

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

279

369

" after %i retries, exiting.",

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self.rename_count)

281

371

raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

372

self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

284

375

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

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376

self.name)

286

self.remove()

377

if remove:

378

self.remove()

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379

try:

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380

self.add()

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381

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

382

if (error.get_dbus_name()

383

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

384

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

385

return self.rename(remove=False)

386

else:

387

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

388

self.cleanup()

389

os._exit(1)

390

295

391

def remove(self):

296

392

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

297

393

if self.entry_group_state_changed_match is not None:

299

395

self.entry_group_state_changed_match = None

300

396

if self.group is not None:

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397

self.group.Reset()

302

398

303

399

def add(self):

304

400

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

305

401

self.remove()

322

418

dbus.UInt16(self.port),

323

419

avahi.string_array_to_txt_array(self.TXT))

324

420

self.group.Commit()

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421

326

422

def entry_group_state_changed(self, state, error):

327

423

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

328

424

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

329

425

330

426

if state == avahi.ENTRY_GROUP_ESTABLISHED:

331

427

logger.debug("Zeroconf service established.")

332

428

elif state == avahi.ENTRY_GROUP_COLLISION:

334

430

self.rename()

335

431

elif state == avahi.ENTRY_GROUP_FAILURE:

336

432

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

337

unicode(error))

338

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

339

.format(error))

340

433

str(error))

434

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

435

341

436

def cleanup(self):

342

437

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

343

438

if self.group is not None:

348

443

pass

349

444

self.group = None

350

445

self.remove()

351

446

352

447

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

353

448

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

354

449

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

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" }

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

362

456

if state in bad_states:

363

457

if bad_states[state] is not None:

364

458

if error is None:

367

461

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

368

462

self.cleanup()

369

463

elif state == avahi.SERVER_RUNNING:

370

self.add()

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

371

476

else:

372

477

if error is None:

373

478

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

374

479

else:

375

480

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

376

481

377

482

def activate(self):

378

483

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

379

484

if self.server is None:

383

488

follow_name_owner_changes=True),

384

489

avahi.DBUS_INTERFACE_SERVER)

385

490

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

491

self.server_state_changed)

387

492

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

388

493

389

494

390

495

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

496

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

392

497

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

398

502

return ret

399

503

400

504

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))

505

# Pretend that we have a GnuTLS module

506

class GnuTLS(object):

507

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

508

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

509

510

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

511

if library is None:

512

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

513

_library = ctypes.cdll.LoadLibrary(library)

514

del library

515

_need_version = b"3.3.0"

516

517

def __init__(self):

518

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

519

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

520

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

521

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

522

.format(self._need_version))

523

524

# Unless otherwise indicated, the constants and types below are

525

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

526

527

# Constants

528

E_SUCCESS = 0

529

E_INTERRUPTED = -52

530

E_AGAIN = -28

531

CRT_OPENPGP = 2

532

CLIENT = 2

533

SHUT_RDWR = 0

534

CRD_CERTIFICATE = 1

535

E_NO_CERTIFICATE_FOUND = -49

536

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

537

538

# Types

539

class session_int(ctypes.Structure):

540

_fields_ = []

541

session_t = ctypes.POINTER(session_int)

542

543

class certificate_credentials_st(ctypes.Structure):

544

_fields_ = []

545

certificate_credentials_t = ctypes.POINTER(

546

certificate_credentials_st)

547

certificate_type_t = ctypes.c_int

548

549

class datum_t(ctypes.Structure):

550

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

551

('size', ctypes.c_uint)]

552

553

class openpgp_crt_int(ctypes.Structure):

554

_fields_ = []

555

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

556

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

557

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

558

credentials_type_t = ctypes.c_int

559

transport_ptr_t = ctypes.c_void_p

560

close_request_t = ctypes.c_int

561

562

# Exceptions

563

class Error(Exception):

564

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

565

# exception might be raised from within GnuTLS.__init__,

566

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

567

# global variable has happened.

568

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

569

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

570

# code is passed, convert it to a string with

571

# gnutls.strerror()

572

self.code = code

573

if message is None and code is not None:

574

message = GnuTLS.strerror(code)

575

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

576

message, *args)

577

578

class CertificateSecurityError(Error):

579

pass

580

581

# Classes

582

class Credentials(object):

583

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

587

self.type = gnutls.CRD_CERTIFICATE

588

589

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

591

592

class ClientSession(object):

593

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

594

self._c_object = gnutls.session_t()

595

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

596

gnutls.set_default_priority(self._c_object)

597

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

598

gnutls.handshake_set_private_extensions(self._c_object,

599

True)

600

self.socket = socket

601

if credentials is None:

602

credentials = gnutls.Credentials()

603

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

604

ctypes.cast(credentials._c_object,

605

ctypes.c_void_p))

606

self.credentials = credentials

607

608

def __del__(self):

609

gnutls.deinit(self._c_object)

610

611

def handshake(self):

612

return gnutls.handshake(self._c_object)

613

614

def send(self, data):

615

data = bytes(data)

616

data_len = len(data)

617

while data_len > 0:

618

data_len -= gnutls.record_send(self._c_object,

619

data[-data_len:],

620

data_len)

621

622

def bye(self):

623

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

624

625

# Error handling functions

626

def _error_code(result):

627

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

628

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

629

if result >= 0:

630

return result

631

if result == gnutls.E_NO_CERTIFICATE_FOUND:

632

raise gnutls.CertificateSecurityError(code=result)

633

raise gnutls.Error(code=result)

634

635

def _retry_on_error(result, func, arguments):

636

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

637

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

638

while result < 0:

639

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

640

return _error_code(result)

641

result = func(*arguments)

642

return result

643

644

# Unless otherwise indicated, the function declarations below are

645

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

646

647

# Functions

648

priority_set_direct = _library.gnutls_priority_set_direct

649

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

650

ctypes.POINTER(ctypes.c_char_p)]

651

priority_set_direct.restype = _error_code

652

653

init = _library.gnutls_init

654

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

655

init.restype = _error_code

656

657

set_default_priority = _library.gnutls_set_default_priority

658

set_default_priority.argtypes = [session_t]

659

set_default_priority.restype = _error_code

660

661

record_send = _library.gnutls_record_send

662

record_send.argtypes = [session_t, ctypes.c_void_p,

663

ctypes.c_size_t]

664

record_send.restype = ctypes.c_ssize_t

665

record_send.errcheck = _retry_on_error

666

667

certificate_allocate_credentials = (

668

_library.gnutls_certificate_allocate_credentials)

669

certificate_allocate_credentials.argtypes = [

670

ctypes.POINTER(certificate_credentials_t)]

671

certificate_allocate_credentials.restype = _error_code

672

673

certificate_free_credentials = (

674

_library.gnutls_certificate_free_credentials)

675

certificate_free_credentials.argtypes = [

676

certificate_credentials_t]

677

certificate_free_credentials.restype = None

678

679

handshake_set_private_extensions = (

680

_library.gnutls_handshake_set_private_extensions)

681

handshake_set_private_extensions.argtypes = [session_t,

682

ctypes.c_int]

683

handshake_set_private_extensions.restype = None

684

685

credentials_set = _library.gnutls_credentials_set

686

credentials_set.argtypes = [session_t, credentials_type_t,

687

ctypes.c_void_p]

688

credentials_set.restype = _error_code

689

690

strerror = _library.gnutls_strerror

691

strerror.argtypes = [ctypes.c_int]

692

strerror.restype = ctypes.c_char_p

693

694

certificate_type_get = _library.gnutls_certificate_type_get

695

certificate_type_get.argtypes = [session_t]

696

certificate_type_get.restype = _error_code

697

698

certificate_get_peers = _library.gnutls_certificate_get_peers

699

certificate_get_peers.argtypes = [session_t,

700

ctypes.POINTER(ctypes.c_uint)]

701

certificate_get_peers.restype = ctypes.POINTER(datum_t)

702

703

global_set_log_level = _library.gnutls_global_set_log_level

704

global_set_log_level.argtypes = [ctypes.c_int]

705

global_set_log_level.restype = None

706

707

global_set_log_function = _library.gnutls_global_set_log_function

708

global_set_log_function.argtypes = [log_func]

709

global_set_log_function.restype = None

710

711

deinit = _library.gnutls_deinit

712

deinit.argtypes = [session_t]

713

deinit.restype = None

714

715

handshake = _library.gnutls_handshake

716

handshake.argtypes = [session_t]

717

handshake.restype = _error_code

718

handshake.errcheck = _retry_on_error

719

720

transport_set_ptr = _library.gnutls_transport_set_ptr

721

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

722

transport_set_ptr.restype = None

723

724

bye = _library.gnutls_bye

725

bye.argtypes = [session_t, close_request_t]

726

bye.restype = _error_code

727

bye.errcheck = _retry_on_error

728

729

check_version = _library.gnutls_check_version

730

check_version.argtypes = [ctypes.c_char_p]

731

check_version.restype = ctypes.c_char_p

732

733

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

734

735

openpgp_crt_init = _library.gnutls_openpgp_crt_init

736

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

737

openpgp_crt_init.restype = _error_code

738

739

openpgp_crt_import = _library.gnutls_openpgp_crt_import

740

openpgp_crt_import.argtypes = [openpgp_crt_t,

741

ctypes.POINTER(datum_t),

742

openpgp_crt_fmt_t]

743

openpgp_crt_import.restype = _error_code

744

745

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

746

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

747

ctypes.POINTER(ctypes.c_uint)]

748

openpgp_crt_verify_self.restype = _error_code

749

750

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

751

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

752

openpgp_crt_deinit.restype = None

753

754

openpgp_crt_get_fingerprint = (

755

_library.gnutls_openpgp_crt_get_fingerprint)

756

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

757

ctypes.c_void_p,

758

ctypes.POINTER(

759

ctypes.c_size_t)]

760

openpgp_crt_get_fingerprint.restype = _error_code

761

762

# Remove non-public functions

763

del _error_code, _retry_on_error

764

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

765

gnutls = GnuTLS()

766

767

768

def call_pipe(connection, # : multiprocessing.Connection

769

func, *args, **kwargs):

770

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

771

772

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

773

return value on the provided multiprocessing.Connection.

774

"""

775

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

776

connection.close()

406

777

407

778

408

779

class Client(object):

409

780

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

410

781

411

782

Attributes:

412

783

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

413

784

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

415

786

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

416

787

to see if the client lives.

417

788

'None' if no process is running.

418

checker_callback_tag: a gobject event source tag, or None

789

checker_callback_tag: a GLib event source tag, or None

419

790

checker_command: string; External command which is run to check

420

791

if client lives. %() expansions are done at

421

792

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

422

793

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

423

checker_initiator_tag: a gobject event source tag, or None

794

checker_initiator_tag: a GLib event source tag, or None

424

795

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

425

796

client_structure: Object describing what attributes a client has

426

797

and is used for storing the client at exit

427

798

current_checker_command: string; current running checker_command

428

disable_initiator_tag: a gobject event source tag, or None

799

disable_initiator_tag: a GLib event source tag, or None

429

800

enabled: bool()

430

801

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

431

802

uniquely identify the client

436

807

last_checker_status: integer between 0 and 255 reflecting exit

437

808

status of last checker. -1 reflects crashed

438

809

checker, -2 means no checker completed yet.

810

last_checker_signal: The signal which killed the last checker, if

811

last_checker_status is -1

439

812

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

440

813

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

441

814

D-Bus identifiers

448

821

disabled, or None

449

822

server_settings: The server_settings dict from main()

450

823

"""

451

824

452

825

runtime_expansions = ("approval_delay", "approval_duration",

453

826

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

454

827

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

455

828

"last_approval_request", "last_checked_ok",

456

829

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

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

830

client_defaults = {

831

"timeout": "PT5M",

832

"extended_timeout": "PT15M",

833

"interval": "PT2M",

834

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

835

"host": "",

836

"approval_delay": "PT0S",

837

"approval_duration": "PT1S",

838

"approved_by_default": "True",

839

"enabled": "True",

840

}

841

483

842

@staticmethod

484

843

def config_parser(config):

485

844

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

492

851

for client_name in config.sections():

493

852

section = dict(config.items(client_name))

494

853

client = settings[client_name] = {}

495

854

496

855

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

497

856

# Reformat values from string types to Python types

498

857

client["approved_by_default"] = config.getboolean(

499

858

client_name, "approved_by_default")

500

859

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

501

860

"enabled")

502

861

862

# Uppercase and remove spaces from fingerprint for later

863

# comparison purposes with return value from the

864

# fingerprint() function

503

865

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

504

866

.replace(" ", ""))

505

867

if "secret" in section:

506

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

868

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

869

.encode("utf-8"),

870

"base64")

507

871

elif "secfile" in section:

508

872

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

509

873

(section["secfile"])),

510

874

"rb") as secfile:

511

875

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

512

876

else:

513

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

877

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

514

878

.format(section))

515

879

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

516

880

client["extended_timeout"] = string_to_delta(

524

888

client["last_approval_request"] = None

525

889

client["last_checked_ok"] = None

526

890

client["last_checker_status"] = -2

527

891

528

892

return settings

529

530

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

893

894

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

531

895

self.name = name

532

896

if server_settings is None:

533

897

server_settings = {}

534

898

self.server_settings = server_settings

535

899

# adding all client settings

536

for setting, value in settings.iteritems():

900

for setting, value in settings.items():

537

901

setattr(self, setting, value)

538

902

539

903

if self.enabled:

540

904

if not hasattr(self, "last_enabled"):

541

905

self.last_enabled = datetime.datetime.utcnow()

545

909

else:

546

910

self.last_enabled = None

547

911

self.expires = None

548

912

549

913

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

553

914

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

554

915

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

555

916

datetime.datetime.utcnow())

556

917

557

918

# attributes specific for this server instance

558

919

self.checker = None

559

920

self.checker_initiator_tag = None

562

923

self.current_checker_command = None

563

924

self.approved = None

564

925

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

926

self.changedstate = multiprocessing_manager.Condition(

927

multiprocessing_manager.Lock())

928

self.client_structure = [attr

929

for attr in self.__dict__.keys()

570

930

if not attr.startswith("_")]

571

931

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

932

933

for name, t in inspect.getmembers(

934

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

577

935

if not name.startswith("_"):

578

936

self.client_structure.append(name)

579

937

580

938

# Send notice to process children that client state has changed

581

939

def send_changedstate(self):

582

940

with self.changedstate:

583

941

self.changedstate.notify_all()

584

942

585

943

def enable(self):

586

944

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

587

945

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

592

950

self.last_enabled = datetime.datetime.utcnow()

593

951

self.init_checker()

594

952

self.send_changedstate()

595

953

596

954

def disable(self, quiet=True):

597

955

"""Disable this client."""

598

956

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

600

958

if not quiet:

601

959

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

602

960

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

603

gobject.source_remove(self.disable_initiator_tag)

961

GLib.source_remove(self.disable_initiator_tag)

604

962

self.disable_initiator_tag = None

605

963

self.expires = None

606

964

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

607

gobject.source_remove(self.checker_initiator_tag)

965

GLib.source_remove(self.checker_initiator_tag)

608

966

self.checker_initiator_tag = None

609

967

self.stop_checker()

610

968

self.enabled = False

611

969

if not quiet:

612

970

self.send_changedstate()

613

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

971

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

614

972

return False

615

973

616

974

def __del__(self):

617

975

self.disable()

618

976

619

977

def init_checker(self):

620

978

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

621

979

# and every interval from then on.

622

980

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

981

GLib.source_remove(self.checker_initiator_tag)

982

self.checker_initiator_tag = GLib.timeout_add(

983

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

984

self.start_checker)

627

985

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

628

986

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

987

GLib.source_remove(self.disable_initiator_tag)

988

self.disable_initiator_tag = GLib.timeout_add(

989

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

633

990

# Also start a new checker *right now*.

634

991

self.start_checker()

635

636

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

992

993

def checker_callback(self, source, condition, connection,

994

command):

637

995

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

638

996

self.checker_callback_tag = None

639

997

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

998

# Read return code from connection (see call_pipe)

999

returncode = connection.recv()

1000

connection.close()

1001

1002

if returncode >= 0:

1003

self.last_checker_status = returncode

1004

self.last_checker_signal = None

642

1005

if self.last_checker_status == 0:

643

1006

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

644

1007

vars(self))

645

1008

self.checked_ok()

646

1009

else:

647

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

648

vars(self))

1010

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

649

1011

else:

650

1012

self.last_checker_status = -1

1013

self.last_checker_signal = -returncode

651

1014

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

652

1015

vars(self))

653

1016

return False

1017

654

1018

def checked_ok(self):

655

1019

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

656

1020

self.last_checked_ok = datetime.datetime.utcnow()

657

1021

self.last_checker_status = 0

1022

self.last_checker_signal = None

658

1023

self.bump_timeout()

659

1024

660

1025

def bump_timeout(self, timeout=None):

661

1026

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

662

1027

if timeout is None:

663

1028

timeout = self.timeout

664

1029

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1030

GLib.source_remove(self.disable_initiator_tag)

666

1031

self.disable_initiator_tag = None

667

1032

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1033

self.disable_initiator_tag = GLib.timeout_add(

1034

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

671

1035

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

672

1036

673

1037

def need_approval(self):

674

1038

self.last_approval_request = datetime.datetime.utcnow()

675

1039

676

1040

def start_checker(self):

677

1041

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

678

1042

679

1043

If a checker already exists, leave it running and do

680

1044

nothing."""

681

1045

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

686

1050

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

687

1051

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

688

1052

# should be.

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)

1053

1054

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

1055

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

1056

self.checker.join()

1057

self.checker = None

704

1058

# Start a new checker if needed

705

1059

if self.checker is None:

706

1060

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1061

escaped_attrs = {

1062

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

1063

for attr in self.runtime_expansions}

711

1064

try:

712

1065

command = self.checker_command % escaped_attrs

713

1066

except TypeError as error:

714

1067

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

1068

self.checker_command,

1069

exc_info=error)

1070

return True # Try again later

717

1071

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",

739

exc_info=error)

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

1072

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

1073

self.name)

1074

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

1075

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

1076

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

1077

# always replaced by /dev/null.)

1078

# The exception is when not debugging but nevertheless

1079

# running in the foreground; use the previously

1080

# created wnull.

1081

popen_args = {"close_fds": True,

1082

"shell": True,

1083

"cwd": "/"}

1084

if (not self.server_settings["debug"]

1085

and self.server_settings["foreground"]):

1086

popen_args.update({"stdout": wnull,

1087

"stderr": wnull})

1088

pipe = multiprocessing.Pipe(duplex=False)

1089

self.checker = multiprocessing.Process(

1090

target=call_pipe,

1091

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

1092

kwargs=popen_args)

1093

self.checker.start()

1094

self.checker_callback_tag = GLib.io_add_watch(

1095

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

1096

self.checker_callback, pipe[0], command)

1097

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

760

1098

return True

761

1099

762

1100

def stop_checker(self):

763

1101

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

764

1102

if self.checker_callback_tag:

765

gobject.source_remove(self.checker_callback_tag)

1103

GLib.source_remove(self.checker_callback_tag)

766

1104

self.checker_callback_tag = None

767

1105

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

768

1106

return

769

1107

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

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

1108

self.checker.terminate()

778

1109

self.checker = None

779

1110

780

1111

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1112

def dbus_service_property(dbus_interface,

1113

signature="v",

1114

access="readwrite",

1115

byte_arrays=False):

783

1116

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1117

become properties on the D-Bus.

785

1118

786

1119

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

787

1120

and with one argument by "Set".

788

1121

789

1122

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

790

1123

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

791

1124

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

794

1127

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

795

1128

if byte_arrays and signature != "ay":

796

1129

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

797

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

1130

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

1131

798

1132

def decorator(func):

799

1133

func._dbus_is_property = True

800

1134

func._dbus_interface = dbus_interface

803

1137

func._dbus_name = func.__name__

804

1138

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

805

1139

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

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1140

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

1141

return func

1142

808

1143

return decorator

809

1144

810

1145

811

1146

def dbus_interface_annotations(dbus_interface):

812

1147

"""Decorator for marking functions returning interface annotations

813

1148

814

1149

Usage:

815

1150

816

1151

@dbus_interface_annotations("org.example.Interface")

817

1152

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

818

1153

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

819

1154

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

820

1155

"false"}

821

1156

"""

1157

822

1158

def decorator(func):

823

1159

func._dbus_is_interface = True

824

1160

func._dbus_interface = dbus_interface

825

1161

func._dbus_name = dbus_interface

826

1162

return func

1163

827

1164

return decorator

828

1165

829

1166

830

1167

def dbus_annotations(annotations):

831

1168

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

832

1169

Usage:

833

1170

1171

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

1172

"org.freedesktop.DBus.Property."

1173

"EmitsChangedSignal": "false"})

834

1174

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

835

1175

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

1176

def Property_dbus_property(self):

840

1177

return dbus.Boolean(False)

1178

1179

See also the DBusObjectWithAnnotations class.

841

1180

"""

1181

842

1182

def decorator(func):

843

1183

func._dbus_annotations = annotations

844

1184

return func

1185

845

1186

return decorator

846

1187

847

1188

848

1189

class DBusPropertyException(dbus.exceptions.DBusException):

849

1190

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

850

1191

"""

851

def __unicode__(self):

852

return unicode(str(self))

1192

pass

853

1193

854

1194

855

1195

class DBusPropertyAccessException(DBusPropertyException):

864

1204

pass

865

1205

866

1206

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.

1207

class DBusObjectWithAnnotations(dbus.service.Object):

1208

"""A D-Bus object with annotations.

1209

1210

Classes inheriting from this can use the dbus_annotations

1211

decorator to add annotations to methods or signals.

873

1212

"""

874

1213

875

1214

@staticmethod

876

1215

def _is_dbus_thing(thing):

877

1216

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

878

1217

879

1218

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

880

1219

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

881

1220

"""

882

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

1221

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

883

1222

False)

884

1223

885

1224

def _get_all_dbus_things(self, thing):

886

1225

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

887

1226

"""

888

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

889

name),

1227

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

890

1228

athing.__get__(self))

891

1229

for cls in self.__class__.__mro__

892

1230

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

1231

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

1232

1233

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1234

out_signature="s",

1235

path_keyword='object_path',

1236

connection_keyword='connection')

1237

def Introspect(self, object_path, connection):

1238

"""Overloading of standard D-Bus method.

1239

1240

Inserts annotation tags on methods and signals.

1241

"""

1242

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

1243

connection)

1244

try:

1245

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

1246

1247

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

1248

# Add annotation tags

1249

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

1250

for tag in if_tag.getElementsByTagName(typ):

1251

annots = dict()

1252

for name, prop in (self.

1253

_get_all_dbus_things(typ)):

1254

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

1255

and prop._dbus_interface

1256

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

1257

annots.update(getattr(

1258

prop, "_dbus_annotations", {}))

1259

for name, value in annots.items():

1260

ann_tag = document.createElement(

1261

"annotation")

1262

ann_tag.setAttribute("name", name)

1263

ann_tag.setAttribute("value", value)

1264

tag.appendChild(ann_tag)

1265

# Add interface annotation tags

1266

for annotation, value in dict(

1267

itertools.chain.from_iterable(

1268

annotations().items()

1269

for name, annotations

1270

in self._get_all_dbus_things("interface")

1271

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

1272

)).items():

1273

ann_tag = document.createElement("annotation")

1274

ann_tag.setAttribute("name", annotation)

1275

ann_tag.setAttribute("value", value)

1276

if_tag.appendChild(ann_tag)

1277

# Fix argument name for the Introspect method itself

1278

if (if_tag.getAttribute("name")

1279

== dbus.INTROSPECTABLE_IFACE):

1280

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

1281

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

1282

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

1283

if (arg.getAttribute("direction")

1284

== "out"):

1285

arg.setAttribute("name",

1286

"xml_data")

1287

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

1288

document.unlink()

1289

except (AttributeError, xml.dom.DOMException,

1290

xml.parsers.expat.ExpatError) as error:

1291

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

1292

exc_info=error)

1293

return xmlstring

1294

1295

1296

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1297

"""A D-Bus object with properties.

1298

1299

Classes inheriting from this can use the dbus_service_property

1300

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

1301

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

1302

"""

1303

896

1304

def _get_dbus_property(self, interface_name, property_name):

897

1305

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

898

1306

property with the specified name and interface.

899

1307

"""

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

1308

for cls in self.__class__.__mro__:

1309

for name, value in inspect.getmembers(

1310

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

904

1311

if (value._dbus_name == property_name

905

1312

and value._dbus_interface == interface_name):

906

1313

return value.__get__(self)

907

1314

908

1315

# No such property

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

1316

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

1317

self.dbus_object_path, interface_name, property_name))

1318

1319

@classmethod

1320

def _get_all_interface_names(cls):

1321

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

1322

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

1323

"_dbus_interface", None)

1324

for x in (inspect.getmro(cls))

1325

for attr in dir(x))

1326

if name is not None)

1327

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="ss",

914

1330

out_signature="v")

915

1331

def Get(self, interface_name, property_name):

916

1332

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

922

1338

if not hasattr(value, "variant_level"):

923

1339

return value

924

1340

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

925

1341

926

1342

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

927

1343

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

928

1344

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

934

1350

# The byte_arrays option is not supported yet on

935

1351

# signatures other than "ay".

936

1352

if prop._dbus_signature != "ay":

937

raise ValueError

1353

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

1354

"'ay' signature {!r}"

1355

.format(prop._dbus_signature))

938

1356

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

939

1357

for byte in value))

940

1358

prop(value)

941

942

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

1359

1360

@dbus.service.method(dbus.PROPERTIES_IFACE,

1361

in_signature="s",

943

1362

out_signature="a{sv}")

944

1363

def GetAll(self, interface_name):

945

1364

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

946

1365

standard.

947

1366

948

1367

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

949

1368

"""

950

1369

properties = {}

960

1379

if not hasattr(value, "variant_level"):

961

1380

properties[name] = value

962

1381

continue

963

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

964

value.variant_level+1)

1382

properties[name] = type(value)(

1383

value, variant_level=value.variant_level + 1)

965

1384

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

966

1385

1386

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

1387

def PropertiesChanged(self, interface_name, changed_properties,

1388

invalidated_properties):

1389

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

1390

standard.

1391

"""

1392

pass

1393

967

1394

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

968

1395

out_signature="s",

969

1396

path_keyword='object_path',

970

1397

connection_keyword='connection')

971

1398

def Introspect(self, object_path, connection):

972

1399

"""Overloading of standard D-Bus method.

973

1400

974

1401

Inserts property tags and interface annotation tags.

975

1402

"""

976

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

977

connection)

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

978

1406

try:

979

1407

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

1408

980

1409

def make_tag(document, name, prop):

981

1410

e = document.createElement("property")

982

1411

e.setAttribute("name", name)

983

1412

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

984

1413

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

985

1414

return e

1415

986

1416

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

987

1417

# Add property tags

988

1418

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

991

1421

if prop._dbus_interface

992

1422

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

993

1423

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

1424

# Add annotation tags for properties

1425

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

1426

annots = dict()

1427

for name, prop in self._get_all_dbus_things(

1428

"property"):

1429

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

1430

and prop._dbus_interface

1431

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

1432

annots.update(getattr(

1433

prop, "_dbus_annotations", {}))

1434

for name, value in annots.items():

1435

ann_tag = document.createElement(

1436

"annotation")

1437

ann_tag.setAttribute("name", name)

1438

ann_tag.setAttribute("value", value)

1439

tag.appendChild(ann_tag)

1025

1440

# Add the names to the return values for the

1026

1441

# "org.freedesktop.DBus.Properties" methods

1027

1442

if (if_tag.getAttribute("name")

1046

1461

return xmlstring

1047

1462

1048

1463

1464

try:

1465

dbus.OBJECT_MANAGER_IFACE

1466

except AttributeError:

1467

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

1468

1469

1470

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1471

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

1472

1473

Classes inheriting from this exposes the standard

1474

GetManagedObjects call and the InterfacesAdded and

1475

InterfacesRemoved signals on the standard

1476

"org.freedesktop.DBus.ObjectManager" interface.

1477

1478

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

1479

manually.

1480

"""

1481

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1482

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

1483

def GetManagedObjects(self):

1484

"""This function must be overridden"""

1485

raise NotImplementedError()

1486

1487

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1488

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

1489

def InterfacesAdded(self, object_path, interfaces_and_properties):

1490

pass

1491

1492

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

1493

def InterfacesRemoved(self, object_path, interfaces):

1494

pass

1495

1496

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1497

out_signature="s",

1498

path_keyword='object_path',

1499

connection_keyword='connection')

1500

def Introspect(self, object_path, connection):

1501

"""Overloading of standard D-Bus method.

1502

1503

Override return argument name of GetManagedObjects to be

1504

"objpath_interfaces_and_properties"

1505

"""

1506

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1507

object_path,

1508

connection)

1509

try:

1510

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

1511

1512

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

1513

# Fix argument name for the GetManagedObjects method

1514

if (if_tag.getAttribute("name")

1515

== dbus.OBJECT_MANAGER_IFACE):

1516

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

1517

if (cn.getAttribute("name")

1518

== "GetManagedObjects"):

1519

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

1520

if (arg.getAttribute("direction")

1521

== "out"):

1522

arg.setAttribute(

1523

"name",

1524

"objpath_interfaces"

1525

"_and_properties")

1526

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

1527

document.unlink()

1528

except (AttributeError, xml.dom.DOMException,

1529

xml.parsers.expat.ExpatError) as error:

1530

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

1531

exc_info=error)

1532

return xmlstring

1533

1534

1049

1535

def datetime_to_dbus(dt, variant_level=0):

1050

1536

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

1051

1537

if dt is None:

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1538

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

1539

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

1055

1540

1056

1541

1057

1542

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

1544

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

1060

1545

interface names according to the "alt_interface_names" mapping.

1061

1546

Usage:

1062

1547

1063

1548

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

1064

1549

"net.example.AlternateInterface"})

1065

1550

class SampleDBusObject(dbus.service.Object):

1066

1551

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

1067

1552

def SampleDBusMethod():

1068

1553

pass

1069

1554

1070

1555

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

1556

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

1072

1557

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

1073

1558

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

1074

1559

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

1075

1560

1076

1561

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

1077

1562

(from DBusObjectWithProperties) and interfaces (from the

1078

1563

dbus_interface_annotations decorator).

1079

1564

"""

1565

1080

1566

def wrapper(cls):

1081

1567

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1568

alt_interface_names.items()):

1083

1569

attr = {}

1084

1570

interface_names = set()

1085

1571

# Go though all attributes of the class

1087

1573

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

1088

1574

# with the wrong interface name

1089

1575

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1576

or not attribute._dbus_interface.startswith(

1577

orig_interface_name)):

1092

1578

continue

1093

1579

# Create an alternate D-Bus interface name based on

1094

1580

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1581

alt_interface = attribute._dbus_interface.replace(

1582

orig_interface_name, alt_interface_name)

1098

1583

interface_names.add(alt_interface)

1099

1584

# Is this a D-Bus signal?

1100

1585

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

1101

1586

# Extract the original non-method undecorated

1102

1587

# function by black magic

1103

nonmethod_func = (dict(

1588

if sys.version_info.major == 2:

1589

nonmethod_func = (dict(

1104

1590

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1591

attribute.__closure__))

1592

["func"].cell_contents)

1593

else:

1594

nonmethod_func = (dict(

1595

zip(attribute.__code__.co_freevars,

1596

attribute.__closure__))

1597

["func"].cell_contents)

1107

1598

# Create a new, but exactly alike, function

1108

1599

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

1109

1600

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1601

new_function = copy_function(nonmethod_func)

1602

new_function = (dbus.service.signal(

1603

alt_interface,

1604

attribute._dbus_signature)(new_function))

1119

1605

# Copy annotations, if any

1120

1606

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1607

new_function._dbus_annotations = dict(

1608

attribute._dbus_annotations)

1123

1609

except AttributeError:

1124

1610

pass

1611

1125

1612

# Define a creator of a function to call both the

1126

1613

# original and alternate functions, so both the

1127

1614

# original and alternate signals gets sent when

1130

1617

"""This function is a scope container to pass

1131

1618

func1 and func2 to the "call_both" function

1132

1619

outside of its arguments"""

1620

1621

@functools.wraps(func2)

1133

1622

def call_both(*args, **kwargs):

1134

1623

"""This function will emit two D-Bus

1135

1624

signals by calling func1 and func2"""

1136

1625

func1(*args, **kwargs)

1137

1626

func2(*args, **kwargs)

1627

# Make wrapper function look like a D-Bus

1628

# signal

1629

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

1630

if name.startswith("_dbus_"):

1631

setattr(call_both, name, attr)

1632

1138

1633

return call_both

1139

1634

# Create the "call_both" function and add it to

1140

1635

# the class

1145

1640

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

1146

1641

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

1147

1642

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1643

attr[attrname] = (

1644

dbus.service.method(

1645

alt_interface,

1646

attribute._dbus_in_signature,

1647

attribute._dbus_out_signature)

1648

(copy_function(attribute)))

1158

1649

# Copy annotations, if any

1159

1650

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1162

1653

except AttributeError:

1163

1654

pass

1164

1655

# Is this a D-Bus property?

1167

1658

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

1168

1659

# property with the alternate D-Bus interface

1169

1660

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1661

attr[attrname] = (dbus_service_property(

1662

alt_interface, attribute._dbus_signature,

1663

attribute._dbus_access,

1664

attribute._dbus_get_args_options

1665

["byte_arrays"])

1666

(copy_function(attribute)))

1183

1667

# Copy annotations, if any

1184

1668

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1669

attr[attrname]._dbus_annotations = dict(

1670

attribute._dbus_annotations)

1187

1671

except AttributeError:

1188

1672

pass

1189

1673

# Is this a D-Bus interface?

1192

1676

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

1193

1677

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

1194

1678

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1679

attr[attrname] = (

1680

dbus_interface_annotations(alt_interface)

1681

(copy_function(attribute)))

1203

1682

if deprecate:

1204

1683

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1684

iname = "_AlternateDBusNames_interface_annotation{}"

1206

1685

for interface_name in interface_names:

1686

1207

1687

@dbus_interface_annotations(interface_name)

1208

1688

def func(self):

1209

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

1210

"true" }

1689

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

1690

"true"}

1211

1691

# Find an unused name

1212

1692

for aname in (iname.format(i)

1213

1693

for i in itertools.count()):

1217

1697

if interface_names:

1218

1698

# Replace the class with a new subclass of it with

1219

1699

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1700

if sys.version_info.major == 2:

1701

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

1702

(cls, ), attr)

1703

else:

1704

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

1705

(cls, ), attr)

1222

1706

return cls

1707

1223

1708

return wrapper

1224

1709

1225

1710

1226

1711

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

1227

"se.bsnet.fukt.Mandos"})

1712

"se.bsnet.fukt.Mandos"})

1228

1713

class ClientDBus(Client, DBusObjectWithProperties):

1229

1714

"""A Client class using D-Bus

1230

1715

1231

1716

Attributes:

1232

1717

dbus_object_path: dbus.ObjectPath

1233

1718

bus: dbus.SystemBus()

1234

1719

"""

1235

1720

1236

1721

runtime_expansions = (Client.runtime_expansions

1237

+ ("dbus_object_path",))

1238

1722

+ ("dbus_object_path", ))

1723

1724

_interface = "se.recompile.Mandos.Client"

1725

1239

1726

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

1240

1241

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

1727

1728

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

1242

1729

self.bus = bus

1243

1730

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

1244

1731

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

1245

1732

# the D-Bus

1246

client_object_name = unicode(self.name).translate(

1733

client_object_name = str(self.name).translate(

1247

1734

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

1248

1735

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

1249

self.dbus_object_path = (dbus.ObjectPath

1250

("/clients/" + client_object_name))

1736

self.dbus_object_path = dbus.ObjectPath(

1737

"/clients/" + client_object_name)

1251

1738

DBusObjectWithProperties.__init__(self, self.bus,

1252

1739

self.dbus_object_path)

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1740

1741

def notifychangeproperty(transform_func, dbus_name,

1742

type_func=lambda x: x,

1743

variant_level=1,

1744

invalidate_only=False,

1745

_interface=_interface):

1257

1746

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

1258

1747

its changes to DBus.

1259

1748

1260

1749

transform_fun: Function that takes a value and a variant_level

1261

1750

and transforms it to a D-Bus type.

1262

1751

dbus_name: D-Bus name of the variable

1264

1753

to the D-Bus. Default: no transform

1265

1754

variant_level: D-Bus variant level. Default: 1

1266

1755

"""

1267

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

1756

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

1757

1268

1758

def setter(self, value):

1269

1759

if hasattr(self, "dbus_object_path"):

1270

1760

if (not hasattr(self, attrname) or

1271

1761

type_func(getattr(self, attrname, None))

1272

1762

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1763

if invalidate_only:

1764

self.PropertiesChanged(

1765

_interface, dbus.Dictionary(),

1766

dbus.Array((dbus_name, )))

1767

else:

1768

dbus_value = transform_func(

1769

type_func(value),

1770

variant_level=variant_level)

1771

self.PropertyChanged(dbus.String(dbus_name),

1772

dbus_value)

1773

self.PropertiesChanged(

1774

_interface,

1775

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

1776

dbus_value}),

1777

dbus.Array())

1278

1778

setattr(self, attrname, value)

1279

1779

1280

1780

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

1281

1781

1282

1782

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1283

1783

approvals_pending = notifychangeproperty(dbus.Boolean,

1284

1784

"ApprovalPending",

1285

type_func = bool)

1785

type_func=bool)

1286

1786

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

1287

1787

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

1788

"LastEnabled")

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1789

checker = notifychangeproperty(

1790

dbus.Boolean, "CheckerRunning",

1791

type_func=lambda checker: checker is not None)

1292

1792

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

1793

"LastCheckedOK")

1294

1794

last_checker_status = notifychangeproperty(dbus.Int16,

1297

1797

datetime_to_dbus, "LastApprovalRequest")

1298

1798

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

1799

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1800

approval_delay = notifychangeproperty(

1801

dbus.UInt64, "ApprovalDelay",

1802

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

1304

1803

approval_duration = notifychangeproperty(

1305

1804

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

1805

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

1307

1806

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1807

timeout = notifychangeproperty(

1808

dbus.UInt64, "Timeout",

1809

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

1311

1810

extended_timeout = notifychangeproperty(

1312

1811

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1812

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

1813

interval = notifychangeproperty(

1814

dbus.UInt64, "Interval",

1815

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

1318

1816

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

1319

1817

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

1818

invalidate_only=True)

1819

1320

1820

del notifychangeproperty

1321

1821

1322

1822

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

1323

1823

try:

1324

1824

self.remove_from_connection()

1327

1827

if hasattr(DBusObjectWithProperties, "__del__"):

1328

1828

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

1329

1829

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

1330

1331

def checker_callback(self, pid, condition, command,

1332

*args, **kwargs):

1333

self.checker_callback_tag = None

1334

self.checker = None

1335

if os.WIFEXITED(condition):

1336

exitstatus = os.WEXITSTATUS(condition)

1830

1831

def checker_callback(self, source, condition,

1832

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

1833

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

1834

connection, command, *args,

1835

**kwargs)

1836

exitstatus = self.last_checker_status

1837

if exitstatus >= 0:

1337

1838

# Emit D-Bus signal

1338

1839

self.CheckerCompleted(dbus.Int16(exitstatus),

1339

dbus.Int64(condition),

1840

# This is specific to GNU libC

1841

dbus.Int64(exitstatus << 8),

1340

1842

dbus.String(command))

1341

1843

else:

1342

1844

# Emit D-Bus signal

1343

1845

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

1344

dbus.Int64(condition),

1846

dbus.Int64(

1847

# This is specific to GNU libC

1848

(exitstatus << 8)

1849

| self.last_checker_signal),

1345

1850

dbus.String(command))

1346

1347

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

1348

*args, **kwargs)

1349

1851

return ret

1852

1350

1853

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

1351

old_checker = self.checker

1352

if self.checker is not None:

1353

old_checker_pid = self.checker.pid

1354

else:

1355

old_checker_pid = None

1854

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

1356

1855

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

1357

1856

# Only if new checker process was started

1358

1857

if (self.checker is not None

1360

1859

# Emit D-Bus signal

1361

1860

self.CheckerStarted(self.current_checker_command)

1362

1861

return r

1363

1862

1364

1863

def _reset_approved(self):

1365

1864

self.approved = None

1366

1865

return False

1367

1866

1368

1867

def approve(self, value=True):

1369

1868

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1869

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

1870

* 1000), self._reset_approved)

1373

1871

self.send_changedstate()

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1872

1873

# D-Bus methods, signals & properties

1874

1875

# Interfaces

1876

1877

# Signals

1878

1387

1879

# CheckerCompleted - signal

1388

1880

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

1389

1881

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

1390

1882

"D-Bus signal"

1391

1883

pass

1392

1884

1393

1885

# CheckerStarted - signal

1394

1886

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

1395

1887

def CheckerStarted(self, command):

1396

1888

"D-Bus signal"

1397

1889

pass

1398

1890

1399

1891

# PropertyChanged - signal

1892

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

1400

1893

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

1401

1894

def PropertyChanged(self, property, value):

1402

1895

"D-Bus signal"

1403

1896

pass

1404

1897

1405

1898

# GotSecret - signal

1406

1899

@dbus.service.signal(_interface)

1407

1900

def GotSecret(self):

1410

1903

server to mandos-client

1411

1904

"""

1412

1905

pass

1413

1906

1414

1907

# Rejected - signal

1415

1908

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

1416

1909

def Rejected(self, reason):

1417

1910

"D-Bus signal"

1418

1911

pass

1419

1912

1420

1913

# NeedApproval - signal

1421

1914

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

1422

1915

def NeedApproval(self, timeout, default):

1423

1916

"D-Bus signal"

1424

1917

return self.need_approval()

1425

1426

## Methods

1427

1918

1919

# Methods

1920

1428

1921

# Approve - method

1429

1922

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

1430

1923

def Approve(self, value):

1431

1924

self.approve(value)

1432

1925

1433

1926

# CheckedOK - method

1434

1927

@dbus.service.method(_interface)

1435

1928

def CheckedOK(self):

1436

1929

self.checked_ok()

1437

1930

1438

1931

# Enable - method

1932

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

1439

1933

@dbus.service.method(_interface)

1440

1934

def Enable(self):

1441

1935

"D-Bus method"

1442

1936

self.enable()

1443

1937

1444

1938

# StartChecker - method

1939

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

1445

1940

@dbus.service.method(_interface)

1446

1941

def StartChecker(self):

1447

1942

"D-Bus method"

1448

1943

self.start_checker()

1449

1944

1450

1945

# Disable - method

1946

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

1451

1947

@dbus.service.method(_interface)

1452

1948

def Disable(self):

1453

1949

"D-Bus method"

1454

1950

self.disable()

1455

1951

1456

1952

# StopChecker - method

1953

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

1457

1954

@dbus.service.method(_interface)

1458

1955

def StopChecker(self):

1459

1956

self.stop_checker()

1460

1461

## Properties

1462

1957

1958

# Properties

1959

1463

1960

# ApprovalPending - property

1464

1961

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

1465

1962

def ApprovalPending_dbus_property(self):

1466

1963

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

1467

1964

1468

1965

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

1966

@dbus_service_property(_interface,

1967

signature="b",

1470

1968

access="readwrite")

1471

1969

def ApprovedByDefault_dbus_property(self, value=None):

1472

1970

if value is None: # get

1473

1971

return dbus.Boolean(self.approved_by_default)

1474

1972

self.approved_by_default = bool(value)

1475

1973

1476

1974

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

1975

@dbus_service_property(_interface,

1976

signature="t",

1478

1977

access="readwrite")

1479

1978

def ApprovalDelay_dbus_property(self, value=None):

1480

1979

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1980

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

1981

* 1000)

1482

1982

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

1483

1983

1484

1984

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

1985

@dbus_service_property(_interface,

1986

signature="t",

1486

1987

access="readwrite")

1487

1988

def ApprovalDuration_dbus_property(self, value=None):

1488

1989

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1990

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

1991

* 1000)

1491

1992

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

1492

1993

1493

1994

# Name - property

1995

@dbus_annotations(

1996

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

1494

1997

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

1495

1998

def Name_dbus_property(self):

1496

1999

return dbus.String(self.name)

1497

2000

1498

2001

# Fingerprint - property

2002

@dbus_annotations(

2003

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

1499

2004

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

1500

2005

def Fingerprint_dbus_property(self):

1501

2006

return dbus.String(self.fingerprint)

1502

2007

1503

2008

# Host - property

1504

@dbus_service_property(_interface, signature="s",

2009

@dbus_service_property(_interface,

2010

signature="s",

1505

2011

access="readwrite")

1506

2012

def Host_dbus_property(self, value=None):

1507

2013

if value is None: # get

1508

2014

return dbus.String(self.host)

1509

self.host = unicode(value)

1510

2015

self.host = str(value)

2016

1511

2017

# Created - property

2018

@dbus_annotations(

2019

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

1512

2020

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

1513

2021

def Created_dbus_property(self):

1514

2022

return datetime_to_dbus(self.created)

1515

2023

1516

2024

# LastEnabled - property

1517

2025

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

1518

2026

def LastEnabled_dbus_property(self):

1519

2027

return datetime_to_dbus(self.last_enabled)

1520

2028

1521

2029

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

2030

@dbus_service_property(_interface,

2031

signature="b",

1523

2032

access="readwrite")

1524

2033

def Enabled_dbus_property(self, value=None):

1525

2034

if value is None: # get

1528

2037

self.enable()

1529

2038

else:

1530

2039

self.disable()

1531

2040

1532

2041

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2042

@dbus_service_property(_interface,

2043

signature="s",

1534

2044

access="readwrite")

1535

2045

def LastCheckedOK_dbus_property(self, value=None):

1536

2046

if value is not None:

1537

2047

self.checked_ok()

1538

2048

return

1539

2049

return datetime_to_dbus(self.last_checked_ok)

1540

2050

1541

2051

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2052

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

1544

2053

def LastCheckerStatus_dbus_property(self):

1545

2054

return dbus.Int16(self.last_checker_status)

1546

2055

1547

2056

# Expires - property

1548

2057

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

1549

2058

def Expires_dbus_property(self):

1550

2059

return datetime_to_dbus(self.expires)

1551

2060

1552

2061

# LastApprovalRequest - property

1553

2062

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

1554

2063

def LastApprovalRequest_dbus_property(self):

1555

2064

return datetime_to_dbus(self.last_approval_request)

1556

2065

1557

2066

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2067

@dbus_service_property(_interface,

2068

signature="t",

1559

2069

access="readwrite")

1560

2070

def Timeout_dbus_property(self, value=None):

1561

2071

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2072

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

1563

2073

old_timeout = self.timeout

1564

2074

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

1565

2075

# Reschedule disabling

1573

2083

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

1574

2084

is None):

1575

2085

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

2086

GLib.source_remove(self.disable_initiator_tag)

2087

self.disable_initiator_tag = GLib.timeout_add(

2088

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

2089

self.disable)

2090

1582

2091

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2092

@dbus_service_property(_interface,

2093

signature="t",

1584

2094

access="readwrite")

1585

2095

def ExtendedTimeout_dbus_property(self, value=None):

1586

2096

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2097

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

2098

* 1000)

1588

2099

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

1589

2100

1590

2101

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2102

@dbus_service_property(_interface,

2103

signature="t",

1592

2104

access="readwrite")

1593

2105

def Interval_dbus_property(self, value=None):

1594

2106

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2107

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

1596

2108

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

1597

2109

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

1598

2110

return

1599

2111

if self.enabled:

1600

2112

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

2113

GLib.source_remove(self.checker_initiator_tag)

2114

self.checker_initiator_tag = GLib.timeout_add(

2115

value, self.start_checker)

2116

self.start_checker() # Start one now, too

2117

1606

2118

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2119

@dbus_service_property(_interface,

2120

signature="s",

1608

2121

access="readwrite")

1609

2122

def Checker_dbus_property(self, value=None):

1610

2123

if value is None: # get

1611

2124

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1613

2125

self.checker_command = str(value)

2126

1614

2127

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2128

@dbus_service_property(_interface,

2129

signature="b",

1616

2130

access="readwrite")

1617

2131

def CheckerRunning_dbus_property(self, value=None):

1618

2132

if value is None: # get

1621

2135

self.start_checker()

1622

2136

else:

1623

2137

self.stop_checker()

1624

2138

1625

2139

# ObjectPath - property

2140

@dbus_annotations(

2141

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

2142

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

1626

2143

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

1627

2144

def ObjectPath_dbus_property(self):

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2145

return self.dbus_object_path # is already a dbus.ObjectPath

2146

1630

2147

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2148

@dbus_annotations(

2149

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

2150

"invalidates"})

2151

@dbus_service_property(_interface,

2152

signature="ay",

2153

access="write",

2154

byte_arrays=True)

1633

2155

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1635

2156

self.secret = bytes(value)

2157

1636

2158

del _interface

1637

2159

1638

2160

1641

2163

self._pipe = child_pipe

1642

2164

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

1643

2165

if not self._pipe.recv():

1644

raise KeyError()

1645

2166

raise KeyError(fpr)

2167

1646

2168

def __getattribute__(self, name):

1647

2169

if name == '_pipe':

1648

2170

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

1651

2173

if data[0] == 'data':

1652

2174

return data[1]

1653

2175

if data[0] == 'function':

2176

1654

2177

def func(*args, **kwargs):

1655

2178

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

1656

2179

return self._pipe.recv()[1]

2180

1657

2181

return func

1658

2182

1659

2183

def __setattr__(self, name, value):

1660

2184

if name == '_pipe':

1661

2185

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

1664

2188

1665

2189

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

2190

"""A class to handle client connections.

1667

2191

1668

2192

Instantiated once for each connection to handle it.

1669

2193

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

1670

2194

1671

2195

def handle(self):

1672

2196

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

1673

2197

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

1674

unicode(self.client_address))

2198

str(self.client_address))

1675

2199

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

1676

2200

self.server.child_pipe.fileno())

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+DHE-DSS"))

2201

2202

session = gnutls.ClientSession(self.request)

2203

2204

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

2205

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

2206

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

2207

# "+DHE-DSS"))

1692

2208

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

1693

2209

priority = self.server.gnutls_priority

1694

2210

if priority is None:

1695

2211

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2212

gnutls.priority_set_direct(session._c_object,

2213

priority.encode("utf-8"),

2214

None)

2215

1700

2216

# Start communication using the Mandos protocol

1701

2217

# Get protocol number

1702

2218

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

1707

2223

except (ValueError, IndexError, RuntimeError) as error:

1708

2224

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

1709

2225

return

1710

2226

1711

2227

# Start GnuTLS connection

1712

2228

try:

1713

2229

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

2230

except gnutls.Error as error:

1715

2231

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

1716

2232

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

1717

2233

# established. Just abandon the request.

1718

2234

return

1719

2235

logger.debug("Handshake succeeded")

1720

2236

1721

2237

approval_required = False

1722

2238

try:

1723

2239

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

2240

fpr = self.fingerprint(

2241

self.peer_certificate(session))

2242

except (TypeError, gnutls.Error) as error:

1728

2243

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

1729

2244

return

1730

2245

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

1731

2246

1732

2247

try:

1733

2248

client = ProxyClient(child_pipe, fpr,

1734

2249

self.client_address)

1735

2250

except KeyError:

1736

2251

return

1737

2252

1738

2253

if client.approval_delay:

1739

2254

delay = client.approval_delay

1740

2255

client.approvals_pending += 1

1741

2256

approval_required = True

1742

2257

1743

2258

while True:

1744

2259

if not client.enabled:

1745

2260

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

1746

client.name)

2261

client.name)

1747

2262

if self.server.use_dbus:

1748

2263

# Emit D-Bus signal

1749

2264

client.Rejected("Disabled")

1750

2265

return

1751

2266

1752

2267

if client.approved or not client.approval_delay:

1753

#We are approved or approval is disabled

2268

# We are approved or approval is disabled

1754

2269

break

1755

2270

elif client.approved is None:

1756

2271

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

1758

2273

if self.server.use_dbus:

1759

2274

# Emit D-Bus signal

1760

2275

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2276

client.approval_delay.total_seconds()

2277

* 1000, client.approved_by_default)

1763

2278

else:

1764

2279

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

1765

2280

client.name)

1767

2282

# Emit D-Bus signal

1768

2283

client.Rejected("Denied")

1769

2284

return

1770

1771

#wait until timeout or approved

2285

2286

# wait until timeout or approved

1772

2287

time = datetime.datetime.now()

1773

2288

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2289

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

1777

2290

client.changedstate.release()

1778

2291

time2 = datetime.datetime.now()

1779

2292

if (time2 - time) >= delay:

1789

2302

break

1790

2303

else:

1791

2304

delay -= time2 - time

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

2305

2306

try:

2307

session.send(client.secret)

2308

except gnutls.Error as error:

2309

logger.warning("gnutls send failed",

2310

exc_info=error)

2311

return

2312

1806

2313

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

1807

2314

# bump the timeout using extended_timeout

1808

2315

client.bump_timeout(client.extended_timeout)

1809

2316

if self.server.use_dbus:

1810

2317

# Emit D-Bus signal

1811

2318

client.GotSecret()

1812

2319

1813

2320

finally:

1814

2321

if approval_required:

1815

2322

client.approvals_pending -= 1

1816

2323

try:

1817

2324

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

2325

except gnutls.Error as error:

1819

2326

logger.warning("GnuTLS bye failed",

1820

2327

exc_info=error)

1821

2328

1822

2329

@staticmethod

1823

2330

def peer_certificate(session):

1824

2331

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

1825

2332

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2333

if (gnutls.certificate_type_get(session._c_object)

2334

!= gnutls.CRT_OPENPGP):

2335

# ...return invalid data

2336

return b""

1831

2337

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2338

cert_list = (gnutls.certificate_get_peers

1834

2339

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

1835

2340

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

1836

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

1837

" certificate")

2341

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

1838

2342

if list_size.value == 0:

1839

2343

return None

1840

2344

cert = cert_list[0]

1841

2345

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

1842

2346

1843

2347

@staticmethod

1844

2348

def fingerprint(openpgp):

1845

2349

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2350

# New GnuTLS "datum" with the OpenPGP public key

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

2351

datum = gnutls.datum_t(

2352

ctypes.cast(ctypes.c_char_p(openpgp),

2353

ctypes.POINTER(ctypes.c_ubyte)),

2354

ctypes.c_uint(len(openpgp)))

1852

2355

# New empty GnuTLS certificate

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2356

crt = gnutls.openpgp_crt_t()

2357

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2358

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2359

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

2360

gnutls.OPENPGP_FMT_RAW)

1861

2361

# Verify the self signature in the key

1862

2362

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2363

gnutls.openpgp_crt_verify_self(crt, 0,

2364

ctypes.byref(crtverify))

1866

2365

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2366

gnutls.openpgp_crt_deinit(crt)

2367

raise gnutls.CertificateSecurityError("Verify failed")

1870

2368

# New buffer for the fingerprint

1871

2369

buf = ctypes.create_string_buffer(20)

1872

2370

buf_len = ctypes.c_size_t()

1873

2371

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2372

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

2373

ctypes.byref(buf_len))

1877

2374

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2375

gnutls.openpgp_crt_deinit(crt)

1879

2376

# Convert the buffer to a Python bytestring

1880

2377

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

1881

2378

# Convert the bytestring to hexadecimal notation

1885

2382

1886

2383

class MultiprocessingMixIn(object):

1887

2384

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

2385

1888

2386

def sub_process_main(self, request, address):

1889

2387

try:

1890

2388

self.finish_request(request, address)

1891

2389

except Exception:

1892

2390

self.handle_error(request, address)

1893

2391

self.close_request(request)

1894

2392

1895

2393

def process_request(self, request, address):

1896

2394

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

1897

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

1898

args = (request, address))

2395

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

2396

args=(request, address))

1899

2397

proc.start()

1900

2398

return proc

1901

2399

1902

2400

1903

2401

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

2402

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

2403

1905

2404

def process_request(self, request, client_address):

1906

2405

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

1907

2406

1908

2407

This function creates a new pipe in self.pipe

1909

2408

"""

1910

2409

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

2410

1912

2411

proc = MultiprocessingMixIn.process_request(self, request,

1913

2412

client_address)

1914

2413

self.child_pipe.close()

1915

2414

self.add_pipe(parent_pipe, proc)

1916

2415

1917

2416

def add_pipe(self, parent_pipe, proc):

1918

2417

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

1919

2418

raise NotImplementedError()

1922

2421

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

2422

socketserver.TCPServer, object):

1924

2423

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

1925

2424

1926

2425

Attributes:

1927

2426

enabled: Boolean; whether this server is activated yet

1928

2427

interface: None or a network interface name (string)

1929

2428

use_ipv6: Boolean; to use IPv6 or not

1930

2429

"""

2430

1931

2431

def __init__(self, server_address, RequestHandlerClass,

1932

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

2432

interface=None,

2433

use_ipv6=True,

2434

socketfd=None):

1933

2435

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

1934

2436

creating a new one with socket.socket().

1935

2437

"""

1941

2443

self.socketfd = socketfd

1942

2444

# Save the original socket.socket() function

1943

2445

self.socket_socket = socket.socket

2446

1944

2447

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

1945

#

2448

#

1946

2449

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

1947

2450

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

1948

2451

# patching socket.socket.)

1949

#

2452

#

1950

2453

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

1951

2454

@functools.wraps(socket.socket)

1952

2455

def socket_wrapper(*args, **kwargs):

1964

2467

# socket_wrapper(), if socketfd was set.

1965

2468

socketserver.TCPServer.__init__(self, server_address,

1966

2469

RequestHandlerClass)

1967

2470

1968

2471

def server_bind(self):

1969

2472

"""This overrides the normal server_bind() function

1970

2473

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

1971

2474

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

2475

global SO_BINDTODEVICE

1972

2476

if self.interface is not None:

1973

2477

if SO_BINDTODEVICE is None:

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

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

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

raise

2478

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

2479

# common enough.

2480

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

2481

SO_BINDTODEVICE = 25

2482

try:

2483

self.socket.setsockopt(

2484

socket.SOL_SOCKET, SO_BINDTODEVICE,

2485

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

2486

except socket.error as error:

2487

if error.errno == errno.EPERM:

2488

logger.error("No permission to bind to"

2489

" interface %s", self.interface)

2490

elif error.errno == errno.ENOPROTOOPT:

2491

logger.error("SO_BINDTODEVICE not available;"

2492

" cannot bind to interface %s",

2493

self.interface)

2494

elif error.errno == errno.ENODEV:

2495

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

2496

" cannot bind", self.interface)

2497

else:

2498

raise

1995

2499

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

1996

2500

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

1997

2501

if not self.server_address[0]:

1998

2502

if self.address_family == socket.AF_INET6:

1999

any_address = "::" # in6addr_any

2503

any_address = "::" # in6addr_any

2000

2504

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

2505

any_address = "0.0.0.0" # INADDR_ANY

2002

2506

self.server_address = (any_address,

2003

2507

self.server_address[1])

2004

2508

elif not self.server_address[1]:

2005

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

2006

0)

2509

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

2007

2510

# if self.interface:

2008

2511

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

2009

2512

# 0, # port

2015

2518

2016

2519

class MandosServer(IPv6_TCPServer):

2017

2520

"""Mandos server.

2018

2521

2019

2522

Attributes:

2020

2523

clients: set of Client objects

2021

2524

gnutls_priority GnuTLS priority string

2022

2525

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

2023

2024

Assumes a gobject.MainLoop event loop.

2526

2527

Assumes a GLib.MainLoop event loop.

2025

2528

"""

2529

2026

2530

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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

2531

interface=None,

2532

use_ipv6=True,

2533

clients=None,

2534

gnutls_priority=None,

2535

use_dbus=True,

2536

socketfd=None):

2029

2537

self.enabled = False

2030

2538

self.clients = clients

2031

2539

if self.clients is None:

2034

2542

self.gnutls_priority = gnutls_priority

2035

2543

IPv6_TCPServer.__init__(self, server_address,

2036

2544

RequestHandlerClass,

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2545

interface=interface,

2546

use_ipv6=use_ipv6,

2547

socketfd=socketfd)

2548

2040

2549

def server_activate(self):

2041

2550

if self.enabled:

2042

2551

return socketserver.TCPServer.server_activate(self)

2043

2552

2044

2553

def enable(self):

2045

2554

self.enabled = True

2046

2555

2047

2556

def add_pipe(self, parent_pipe, proc):

2048

2557

# Call "handle_ipc" for both data and EOF events

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

proc = None, client_object=None):

2558

GLib.io_add_watch(

2559

parent_pipe.fileno(),

2560

GLib.IO_IN | GLib.IO_HUP,

2561

functools.partial(self.handle_ipc,

2562

parent_pipe=parent_pipe,

2563

proc=proc))

2564

2565

def handle_ipc(self, source, condition,

2566

parent_pipe=None,

2567

proc=None,

2568

client_object=None):

2058

2569

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

2059

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

2570

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

2060

2571

# Wait for other process to exit

2061

2572

proc.join()

2062

2573

return False

2063

2574

2064

2575

# Read a request from the child

2065

2576

request = parent_pipe.recv()

2066

2577

command = request[0]

2067

2578

2068

2579

if command == 'init':

2069

2580

fpr = request[1]

2070

2581

address = request[2]

2071

2072

for c in self.clients.itervalues():

2582

2583

for c in self.clients.values():

2073

2584

if c.fingerprint == fpr:

2074

2585

client = c

2075

2586

break

2082

2593

address[0])

2083

2594

parent_pipe.send(False)

2084

2595

return False

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2596

2597

GLib.io_add_watch(

2598

parent_pipe.fileno(),

2599

GLib.IO_IN | GLib.IO_HUP,

2600

functools.partial(self.handle_ipc,

2601

parent_pipe=parent_pipe,

2602

proc=proc,

2603

client_object=client))

2094

2604

parent_pipe.send(True)

2095

2605

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

2096

2606

# same fileno

2099

2609

funcname = request[1]

2100

2610

args = request[2]

2101

2611

kwargs = request[3]

2102

2612

2103

2613

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

2104

2614

funcname)(*args,

2105

**kwargs)))

2106

2615

**kwargs)))

2616

2107

2617

if command == 'getattr':

2108

2618

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2619

if isinstance(client_object.__getattribute__(attrname),

2620

collections.Callable):

2621

parent_pipe.send(('function', ))

2111

2622

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2623

parent_pipe.send((

2624

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

2625

2115

2626

if command == 'setattr':

2116

2627

attrname = request[1]

2117

2628

value = request[2]

2118

2629

setattr(client_object, attrname, value)

2119

2630

2120

2631

return True

2121

2632

2122

2633

2123

2634

def rfc3339_duration_to_delta(duration):

2124

2635

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

2125

2636

2126

2637

>>> rfc3339_duration_to_delta("P7D")

2127

2638

datetime.timedelta(7)

2128

2639

>>> rfc3339_duration_to_delta("PT60S")

2138

2649

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

2650

datetime.timedelta(1, 200)

2140

2651

"""

2141

2652

2142

2653

# Parsing an RFC 3339 duration with regular expressions is not

2143

2654

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

2144

2655

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

2145

2656

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

2146

2657

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

2147

2658

# avoid excessive use of external libraries.

2148

2659

2149

2660

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2661

Token = collections.namedtuple("Token", (

2662

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

2663

# a "group" containing digits

2664

"value", # datetime.timedelta or None

2665

"followers")) # Tokens valid after this token

2159

2666

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

2160

2667

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

2161

2668

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

2162

2669

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

2163

2670

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2671

frozenset((token_end, )))

2165

2672

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

2166

2673

datetime.timedelta(minutes=1),

2167

2674

frozenset((token_second, token_end)))

2183

2690

frozenset((token_month, token_end)))

2184

2691

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

2185

2692

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2693

frozenset((token_end, )))

2187

2694

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

2188

2695

frozenset((token_year, token_month,

2189

2696

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2697

token_week)))

2698

# Define starting values:

2699

# Value so far

2700

value = datetime.timedelta()

2193

2701

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2702

# Following valid tokens

2703

followers = frozenset((token_duration, ))

2704

# String left to parse

2705

s = duration

2196

2706

# Loop until end token is found

2197

2707

while found_token is not token_end:

2198

2708

# Search for any currently valid tokens

2214

2724

break

2215

2725

else:

2216

2726

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2727

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

2728

.format(duration))

2218

2729

# End token found

2219

2730

return value

2220

2731

2221

2732

2222

2733

def string_to_delta(interval):

2223

2734

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

2224

2735

2225

2736

>>> string_to_delta('7d')

2226

2737

datetime.timedelta(7)

2227

2738

>>> string_to_delta('60s')

2235

2746

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

2236

2747

datetime.timedelta(0, 330)

2237

2748

"""

2238

2749

2239

2750

try:

2240

2751

return rfc3339_duration_to_delta(interval)

2241

2752

except ValueError:

2242

2753

pass

2243

2754

2244

2755

timevalue = datetime.timedelta(0)

2245

2756

for s in interval.split():

2246

2757

try:

2247

suffix = unicode(s[-1])

2758

suffix = s[-1]

2248

2759

value = int(s[:-1])

2249

2760

if suffix == "d":

2250

2761

delta = datetime.timedelta(value)

2257

2768

elif suffix == "w":

2258

2769

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

2259

2770

else:

2260

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

2261

.format(suffix))

2771

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

2262

2772

except IndexError as e:

2263

2773

raise ValueError(*(e.args))

2264

2774

timevalue += delta

2265

2775

return timevalue

2266

2776

2267

2777

2268

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

2778

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

2269

2779

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

2270

2780

2271

2781

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

2272

2782

if os.fork():

2273

2783

sys.exit()

2281

2791

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

2282

2792

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

2283

2793

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2794

"{} not a character device"

2285

2795

.format(os.devnull))

2286

2796

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

2287

2797

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

2291

2801

2292

2802

2293

2803

def main():

2294

2804

2295

2805

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

2296

2806

# Parsing of options, both command line and config file

2297

2807

2298

2808

parser = argparse.ArgumentParser()

2299

2809

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

2300

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

2810

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

2301

2811

help="show version number and exit")

2302

2812

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

2303

2813

help="Bind to interface IF")

2336

2846

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

2337

2847

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

2338

2848

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

2339

2849

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

2850

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

2851

default=None)

2852

2340

2853

options = parser.parse_args()

2341

2854

2342

2855

if options.check:

2343

2856

import doctest

2344

doctest.testmod()

2345

sys.exit()

2346

2857

fail_count, test_count = doctest.testmod()

2858

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

2859

2347

2860

# Default values for config file for server-global settings

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

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

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

2861

server_defaults = {"interface": "",

2862

"address": "",

2863

"port": "",

2864

"debug": "False",

2865

"priority":

2866

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

2867

":+SIGN-DSA-SHA256",

2868

"servicename": "Mandos",

2869

"use_dbus": "True",

2870

"use_ipv6": "True",

2871

"debuglevel": "",

2872

"restore": "True",

2873

"socket": "",

2874

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

2875

"foreground": "False",

2876

"zeroconf": "True",

2877

}

2878

2364

2879

# Parse config file for server-global settings

2365

2880

server_config = configparser.SafeConfigParser(server_defaults)

2366

2881

del server_defaults

2367

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

2368

"mandos.conf"))

2882

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

2369

2883

# Convert the SafeConfigParser object to a dict

2370

2884

server_settings = server_config.defaults()

2371

2885

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

2372

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

2886

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

2887

"foreground", "zeroconf"):

2373

2888

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

2374

2889

option)

2375

2890

if server_settings["port"]:

2385

2900

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

2386

2901

["socket"])

2387

2902

del server_config

2388

2903

2389

2904

# Override the settings from the config file with command line

2390

2905

# options, if set.

2391

2906

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

2392

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

2393

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

2394

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

2907

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

2908

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

2909

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

2395

2910

value = getattr(options, option)

2396

2911

if value is not None:

2397

2912

server_settings[option] = value

2398

2913

del options

2399

2914

# Force all strings to be unicode

2400

2915

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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

2916

if isinstance(server_settings[option], bytes):

2917

server_settings[option] = (server_settings[option]

2918

.decode("utf-8"))

2403

2919

# Force all boolean options to be boolean

2404

2920

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

2405

"foreground"):

2921

"foreground", "zeroconf"):

2406

2922

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

2407

2923

# Debug implies foreground

2408

2924

if server_settings["debug"]:

2409

2925

server_settings["foreground"] = True

2410

2926

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

2411

2927

2412

2928

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

2413

2929

2930

if (not server_settings["zeroconf"]

2931

and not (server_settings["port"]

2932

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

2933

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

2934

2414

2935

# For convenience

2415

2936

debug = server_settings["debug"]

2416

2937

debuglevel = server_settings["debuglevel"]

2419

2940

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

2420

2941

stored_state_file)

2421

2942

foreground = server_settings["foreground"]

2422

2943

zeroconf = server_settings["zeroconf"]

2944

2423

2945

if debug:

2424

2946

initlogger(debug, logging.DEBUG)

2425

2947

else:

2428

2950

else:

2429

2951

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

2430

2952

initlogger(debug, level)

2431

2953

2432

2954

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

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

2955

syslogger.setFormatter(

2956

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

2957

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

2958

server_settings["servicename"])))

2959

2439

2960

# Parse config file with clients

2440

2961

client_config = configparser.SafeConfigParser(Client

2441

2962

.client_defaults)

2442

2963

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

2443

2964

"clients.conf"))

2444

2965

2445

2966

global mandos_dbus_service

2446

2967

mandos_dbus_service = None

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2968

2969

socketfd = None

2970

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

2971

socketfd = server_settings["socket"]

2972

tcp_server = MandosServer(

2973

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

2974

ClientHandler,

2975

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

2976

use_ipv6=use_ipv6,

2977

gnutls_priority=server_settings["priority"],

2978

use_dbus=use_dbus,

2979

socketfd=socketfd)

2459

2980

if not foreground:

2460

2981

pidfilename = "/run/mandos.pid"

2461

2982

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

2462

2983

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

2463

2984

pidfile = None

2464

2985

try:

2465

pidfile = open(pidfilename, "w")

2986

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

2466

2987

except IOError as e:

2467

2988

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

2468

2989

exc_info=e)

2469

2470

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

2990

2991

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

2992

("mandos", "mandos"),

2993

("nobody", "nogroup")):

2471

2994

try:

2472

2995

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2996

gid = pwd.getpwnam(group).pw_gid

2474

2997

break

2475

2998

except KeyError:

2476

2999

continue

2480

3003

try:

2481

3004

os.setgid(gid)

2482

3005

os.setuid(uid)

3006

if debug:

3007

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

3008

gid))

2483

3009

except OSError as error:

3010

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

3011

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

2484

3012

if error.errno != errno.EPERM:

2485

3013

raise

2486

3014

2487

3015

if debug:

2488

3016

# Enable all possible GnuTLS debugging

2489

3017

2490

3018

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

2491

3019

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3020

gnutls.global_set_log_level(11)

3021

3022

@gnutls.log_func

2495

3023

def debug_gnutls(level, string):

2496

3024

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

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3025

3026

gnutls.global_set_log_function(debug_gnutls)

3027

2501

3028

# Redirect stdin so all checkers get /dev/null

2502

3029

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

2503

3030

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

2504

3031

if null > 2:

2505

3032

os.close(null)

2506

3033

2507

3034

# Need to fork before connecting to D-Bus

2508

3035

if not foreground:

2509

3036

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

2510

3037

daemon()

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

3038

3039

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

3040

# to inform GLib that threads will be used.

3041

GLib.threads_init()

3042

2516

3043

global main_loop

2517

3044

# From the Avahi example code

2518

3045

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3046

main_loop = GLib.MainLoop()

2520

3047

bus = dbus.SystemBus()

2521

3048

# End of Avahi example code

2522

3049

if use_dbus:

2523

3050

try:

2524

3051

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

3052

bus,

3053

do_not_queue=True)

3054

old_bus_name = dbus.service.BusName(

3055

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

3056

do_not_queue=True)

3057

except dbus.exceptions.DBusException as e:

2530

3058

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

2531

3059

use_dbus = False

2532

3060

server_settings["use_dbus"] = False

2533

3061

tcp_server.use_dbus = False

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

3062

if zeroconf:

3063

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3064

service = AvahiServiceToSyslog(

3065

name=server_settings["servicename"],

3066

servicetype="_mandos._tcp",

3067

protocol=protocol,

3068

bus=bus)

3069

if server_settings["interface"]:

3070

service.interface = if_nametoindex(

3071

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

3072

2543

3073

global multiprocessing_manager

2544

3074

multiprocessing_manager = multiprocessing.Manager()

2545

3075

2546

3076

client_class = Client

2547

3077

if use_dbus:

2548

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

2549

3078

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

3079

2550

3080

client_settings = Client.config_parser(client_config)

2551

3081

old_client_settings = {}

2552

3082

clients_data = {}

2553

3083

2554

3084

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

2555

3085

global wnull

2556

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

3086

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

2557

3087

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

2558

3088

# mode

2559

3089

if debug or not foreground:

2560

3090

wnull.close()

2561

3091

2562

3092

# Get client data and settings from last running state.

2563

3093

if server_settings["restore"]:

2564

3094

try:

2565

3095

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3096

if sys.version_info.major == 2:

3097

clients_data, old_client_settings = pickle.load(

3098

stored_state)

3099

else:

3100

bytes_clients_data, bytes_old_client_settings = (

3101

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

3102

# Fix bytes to strings

3103

# clients_data

3104

# .keys()

3105

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

3106

if isinstance(key, bytes)

3107

else key): value

3108

for key, value in

3109

bytes_clients_data.items()}

3110

del bytes_clients_data

3111

for key in clients_data:

3112

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

3113

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

3114

for k, v in

3115

clients_data[key].items()}

3116

clients_data[key] = value

3117

# .client_structure

3118

value["client_structure"] = [

3119

(s.decode("utf-8")

3120

if isinstance(s, bytes)

3121

else s) for s in

3122

value["client_structure"]]

3123

# .name & .host

3124

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

3125

if isinstance(value[k], bytes):

3126

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

3127

# old_client_settings

3128

# .keys()

3129

old_client_settings = {

3130

(key.decode("utf-8")

3131

if isinstance(key, bytes)

3132

else key): value

3133

for key, value in

3134

bytes_old_client_settings.items()}

3135

del bytes_old_client_settings

3136

# .host

3137

for value in old_client_settings.values():

3138

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

3139

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

3140

.decode("utf-8"))

2568

3141

os.remove(stored_state_path)

2569

3142

except IOError as e:

2570

3143

if e.errno == errno.ENOENT:

2571

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

2572

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

3144

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

3145

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

2573

3146

else:

2574

3147

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

2575

3148

exc_info=e)

2576

3149

raise

2577

3150

except EOFError as e:

2578

3151

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

2579

"EOFError:", exc_info=e)

2580

3152

"EOFError:",

3153

exc_info=e)

3154

2581

3155

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3156

for client_name, client in clients_data.items():

2583

3157

# Skip removed clients

2584

3158

if client_name not in client_settings:

2585

3159

continue

2586

3160

2587

3161

# Decide which value to use after restoring saved state.

2588

3162

# We have three different values: Old config file,

2589

3163

# new config file, and saved state.

2594

3168

# For each value in new config, check if it

2595

3169

# differs from the old config value (Except for

2596

3170

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3171

if (name != "secret"

3172

and (value !=

3173

old_client_settings[client_name][name])):

2600

3174

client[name] = value

2601

3175

except KeyError:

2602

3176

pass

2603

3177

2604

3178

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3179

# enabled if its last checker was successful. A Client

2606

3180

# whose checker succeeded before we stored its state is

2607

3181

# assumed to have successfully run all checkers during

2608

3182

# downtime.

2610

3184

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

2611

3185

if not client["last_checked_ok"]:

2612

3186

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3187

"disabling client {} - Client never "

3188

"performed a successful checker".format(

3189

client_name))

2616

3190

client["enabled"] = False

2617

3191

elif client["last_checker_status"] != 0:

2618

3192

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3193

"disabling client {} - Client last"

3194

" checker failed with error code"

3195

" {}".format(

3196

client_name,

3197

client["last_checker_status"]))

2623

3198

client["enabled"] = False

2624

3199

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3200

client["expires"] = (

3201

datetime.datetime.utcnow()

3202

+ client["timeout"])

2628

3203

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3204

" keeping {} enabled".format(

3205

client_name))

2631

3206

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3207

client["secret"] = pgp.decrypt(

3208

client["encrypted_secret"],

3209

client_settings[client_name]["secret"])

2636

3210

except PGPError:

2637

3211

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3212

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

3213

client_name))

3214

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

3215

["secret"])

3216

2643

3217

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

2644

3218

for client_name in (set(old_client_settings)

2645

3219

- set(client_settings)):

2647

3221

for client_name in (set(client_settings)

2648

3222

- set(old_client_settings)):

2649

3223

clients_data[client_name] = client_settings[client_name]

2650

3224

2651

3225

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3226

for client_name, client in clients_data.items():

2653

3227

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3228

name=client_name,

3229

settings=client,

3230

server_settings=server_settings)

3231

2657

3232

if not tcp_server.clients:

2658

3233

logger.warning("No clients defined")

2659

3234

2660

3235

if not foreground:

2661

3236

if pidfile is not None:

3237

pid = os.getpid()

2662

3238

try:

2663

3239

with pidfile:

2664

pid = os.getpid()

2665

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

3240

print(pid, file=pidfile)

2666

3241

except IOError:

2667

3242

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

2668

3243

pidfilename, pid)

2669

3244

del pidfile

2670

3245

del pidfilename

2671

2672

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

2673

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

2674

3246

3247

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

3248

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3249

lambda: main_loop.quit() and False)

3250

2675

3251

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3252

3253

@alternate_dbus_interfaces(

3254

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

3255

class MandosDBusService(DBusObjectWithObjectManager):

2679

3256

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

3257

2680

3258

def __init__(self):

2681

3259

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

3260

2682

3261

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3262

2690

3263

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

2691

3264

def ClientAdded(self, objpath):

2692

3265

"D-Bus signal"

2693

3266

pass

2694

3267

2695

3268

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

2696

3269

def ClientNotFound(self, fingerprint, address):

2697

3270

"D-Bus signal"

2698

3271

pass

2699

3272

3273

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

3274

"true"})

2700

3275

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

2701

3276

def ClientRemoved(self, objpath, name):

2702

3277

"D-Bus signal"

2703

3278

pass

2704

3279

3280

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

3281

"true"})

2705

3282

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

2706

3283

def GetAllClients(self):

2707

3284

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3285

return dbus.Array(c.dbus_object_path for c in

3286

tcp_server.clients.values())

3287

3288

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

3289

"true"})

2712

3290

@dbus.service.method(_interface,

2713

3291

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

2714

3292

def GetAllClientsWithProperties(self):

2715

3293

"D-Bus method"

2716

3294

return dbus.Dictionary(

2717

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

2718

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

3295

{c.dbus_object_path: c.GetAll(

3296

"se.recompile.Mandos.Client")

3297

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

2719

3298

signature="oa{sv}")

2720

3299

2721

3300

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

2722

3301

def RemoveClient(self, object_path):

2723

3302

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3303

for c in tcp_server.clients.values():

2725

3304

if c.dbus_object_path == object_path:

2726

3305

del tcp_server.clients[c.name]

2727

3306

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3307

# Don't signal the disabling

2729

3308

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3309

# Emit D-Bus signal for removal

3310

self.client_removed_signal(c)

2732

3311

return

2733

3312

raise KeyError(object_path)

2734

3313

2735

3314

del _interface

2736

3315

3316

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3317

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

3318

def GetManagedObjects(self):

3319

"""D-Bus method"""

3320

return dbus.Dictionary(

3321

{client.dbus_object_path:

3322

dbus.Dictionary(

3323

{interface: client.GetAll(interface)

3324

for interface in

3325

client._get_all_interface_names()})

3326

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

3327

3328

def client_added_signal(self, client):

3329

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

3330

if use_dbus:

3331

# New standard signal

3332

self.InterfacesAdded(

3333

client.dbus_object_path,

3334

dbus.Dictionary(

3335

{interface: client.GetAll(interface)

3336

for interface in

3337

client._get_all_interface_names()}))

3338

# Old signal

3339

self.ClientAdded(client.dbus_object_path)

3340

3341

def client_removed_signal(self, client):

3342

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

3343

if use_dbus:

3344

# New standard signal

3345

self.InterfacesRemoved(

3346

client.dbus_object_path,

3347

client._get_all_interface_names())

3348

# Old signal

3349

self.ClientRemoved(client.dbus_object_path,

3350

client.name)

3351

2737

3352

mandos_dbus_service = MandosDBusService()

2738

3353

3354

# Save modules to variables to exempt the modules from being

3355

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

3356

mp = multiprocessing

3357

wn = wnull

3358

2739

3359

def cleanup():

2740

3360

"Cleanup function; run on exit"

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3361

if zeroconf:

3362

service.cleanup()

3363

3364

mp.active_children()

3365

wn.close()

2745

3366

if not (tcp_server.clients or client_settings):

2746

3367

return

2747

3368

2748

3369

# Store client before exiting. Secrets are encrypted with key

2749

3370

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

2750

3371

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

2751

3372

clients = {}

2752

3373

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3374

for client in tcp_server.clients.values():

2754

3375

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

2755

3376

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

2756

3377

key)

2757

3378

client_dict = {}

2758

3379

2759

3380

# A list of attributes that can not be pickled

2760

3381

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3382

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

3383

"checker", "server_settings"}

3384

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

3385

.Object):

2765

3386

exclude.add(name)

2766

3387

2767

3388

client_dict["encrypted_secret"] = (client

2768

3389

.encrypted_secret)

2769

3390

for attr in client.client_structure:

2770

3391

if attr not in exclude:

2771

3392

client_dict[attr] = getattr(client, attr)

2772

3393

2773

3394

clients[client.name] = client_dict

2774

3395

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

2775

3396

2776

3397

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

3398

with tempfile.NamedTemporaryFile(

3399

mode='wb',

3400

suffix=".pickle",

3401

prefix='clients-',

3402

dir=os.path.dirname(stored_state_path),

3403

delete=False) as stored_state:

3404

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

3405

protocol=2)

3406

tempname = stored_state.name

2783

3407

os.rename(tempname, stored_state_path)

2784

3408

except (IOError, OSError) as e:

2785

3409

if not debug:

2788

3412

except NameError:

2789

3413

pass

2790

3414

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

2791

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

3415

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

2792

3416

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

2793

3417

else:

2794

3418

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

2795

3419

exc_info=e)

2796

3420

raise

2797

3421

2798

3422

# Delete all clients, and settings from config

2799

3423

while tcp_server.clients:

2800

3424

name, client = tcp_server.clients.popitem()

2801

3425

if use_dbus:

2802

3426

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3427

# Don't signal the disabling

2804

3428

client.disable(quiet=True)

3429

# Emit D-Bus signal for removal

2805

3430

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3431

mandos_dbus_service.client_removed_signal(client)

2810

3432

client_settings.clear()

2811

3433

2812

3434

atexit.register(cleanup)

2813

2814

for client in tcp_server.clients.itervalues():

3435

3436

for client in tcp_server.clients.values():

2815

3437

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3438

# Emit D-Bus signal for adding

3439

mandos_dbus_service.client_added_signal(client)

2818

3440

# Need to initiate checking of clients

2819

3441

if client.enabled:

2820

3442

client.init_checker()

2821

3443

2822

3444

tcp_server.enable()

2823

3445

tcp_server.server_activate()

2824

3446

2825

3447

# Find out what port we got

2826

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

3448

if zeroconf:

3449

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

2827

3450

if use_ipv6:

2828

3451

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

2829

3452

" flowinfo %d, scope_id %d",

2831

3454

else: # IPv4

2832

3455

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

2833

3456

*tcp_server.socket.getsockname())

2834

2835

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

2836

3457

3458

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

3459

2837

3460

try:

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

3461

if zeroconf:

3462

# From the Avahi example code

3463

try:

3464

service.activate()

3465

except dbus.exceptions.DBusException as error:

3466

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

3467

cleanup()

3468

sys.exit(1)

3469

# End of Avahi example code

3470

3471

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

3472

lambda *args, **kwargs:

3473

(tcp_server.handle_request

3474

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

3475

2852

3476

logger.debug("Starting main loop")

2853

3477

main_loop.run()

2854

3478

except AvahiError as error:

2863

3487

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

2864

3488

cleanup()

2865

3489

3490

2866

3491

if __name__ == '__main__':

2867

3492

main()