/mandos/release : revision 237.7.511

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.8"

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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 = "1.7.20"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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181

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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.

182

236

.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

189

) 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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245

passfile.flush()

192

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)

250

stdin=subprocess.PIPE,

251

stdout=subprocess.PIPE,

252

stderr=subprocess.PIPE)

253

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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204

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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:

260

with tempfile.NamedTemporaryFile(

261

dir=self.tempdir) as passfile:

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262

passfile.write(passphrase)

209

263

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,

215

stdout = subprocess.PIPE,

216

stderr = subprocess.PIPE)

217

decrypted_plaintext, err = proc.communicate(input

218

= data)

268

stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

271

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

219

272

if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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276

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# Pretend that we have an Avahi module

278

class Avahi(object):

279

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

280

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

281

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

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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"

286

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

287

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

288

DBUS_PATH_SERVER = "/"

289

290

def string_array_to_txt_array(self, t):

291

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

292

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

293

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

296

SERVER_INVALID = 0 # avahi-common/defs.h

297

SERVER_REGISTERING = 1 # avahi-common/defs.h

298

SERVER_RUNNING = 2 # avahi-common/defs.h

299

SERVER_COLLISION = 3 # avahi-common/defs.h

300

SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

302

303

224

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class AvahiError(Exception):

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

226

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self.value = value

227

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

228

def __unicode__(self):

229

return unicode(repr(self.value))

307

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

308

**kwargs)

309

230

310

231

311

class AvahiServiceError(AvahiError):

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pass

233

313

314

234

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class AvahiGroupError(AvahiError):

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pass

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318

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class AvahiService(object):

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320

"""An Avahi (Zeroconf) service.

240

321

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Attributes:

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323

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

243

324

Used to optionally bind to the specified interface.

255

336

server: D-Bus Server

256

337

bus: dbus.SystemBus()

257

338

"""

258

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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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340

def __init__(self,

341

interface=avahi.IF_UNSPEC,

342

name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

346

domain="",

347

host="",

348

max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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352

self.name = name

265

353

self.type = servicetype

274

362

self.server = None

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self.bus = bus

276

364

self.entry_group_state_changed_match = None

277

278

def rename(self):

365

366

def rename(self, remove=True):

279

367

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

280

368

if self.rename_count >= self.max_renames:

281

369

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

282

370

" after %i retries, exiting.",

283

371

self.rename_count)

284

372

raise AvahiServiceError("Too many renames")

285

self.name = unicode(self.server

286

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

287

376

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

288

377

self.name)

289

self.remove()

378

if remove:

379

self.remove()

290

380

try:

291

381

self.add()

292

382

except dbus.exceptions.DBusException as error:

293

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

294

self.cleanup()

295

os._exit(1)

296

self.rename_count += 1

297

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

298

392

def remove(self):

299

393

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

300

394

if self.entry_group_state_changed_match is not None:

302

396

self.entry_group_state_changed_match = None

303

397

if self.group is not None:

304

398

self.group.Reset()

305

399

306

400

def add(self):

307

401

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

308

402

self.remove()

325

419

dbus.UInt16(self.port),

326

420

avahi.string_array_to_txt_array(self.TXT))

327

421

self.group.Commit()

328

422

329

423

def entry_group_state_changed(self, state, error):

330

424

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

331

425

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

332

426

333

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

334

428

logger.debug("Zeroconf service established.")

335

429

elif state == avahi.ENTRY_GROUP_COLLISION:

337

431

self.rename()

338

432

elif state == avahi.ENTRY_GROUP_FAILURE:

339

433

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

340

unicode(error))

341

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

342

.format(error))

343

434

str(error))

435

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

436

344

437

def cleanup(self):

345

438

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

346

439

if self.group is not None:

351

444

pass

352

445

self.group = None

353

446

self.remove()

354

447

355

448

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

356

449

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

357

450

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

358

bad_states = { avahi.SERVER_INVALID:

359

"Zeroconf server invalid",

360

avahi.SERVER_REGISTERING: None,

361

avahi.SERVER_COLLISION:

362

"Zeroconf server name collision",

363

avahi.SERVER_FAILURE:

364

"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

365

457

if state in bad_states:

366

458

if bad_states[state] is not None:

367

459

if error is None:

370

462

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

371

463

self.cleanup()

372

464

elif state == avahi.SERVER_RUNNING:

373

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

374

477

else:

375

478

if error is None:

376

479

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

377

480

else:

378

481

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

379

482

380

483

def activate(self):

381

484

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

382

485

if self.server is None:

386

489

follow_name_owner_changes=True),

387

490

avahi.DBUS_INTERFACE_SERVER)

388

491

self.server.connect_to_signal("StateChanged",

389

self.server_state_changed)

492

self.server_state_changed)

390

493

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

391

494

392

495

393

496

class AvahiServiceToSyslog(AvahiService):

394

def rename(self):

497

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

395

498

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

396

ret = AvahiService.rename(self)

397

syslogger.setFormatter(logging.Formatter

398

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

399

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

400

.format(self.name)))

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

401

503

return ret

402

504

403

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

_tls_rawpk_version = b"3.6.6"

518

519

def __init__(self):

520

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

521

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

522

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

523

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

524

.format(self._need_version))

525

526

# Unless otherwise indicated, the constants and types below are

527

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

528

529

# Constants

530

E_SUCCESS = 0

531

E_INTERRUPTED = -52

532

E_AGAIN = -28

533

CRT_OPENPGP = 2

534

CRT_RAWPK = 3

535

CLIENT = 2

536

SHUT_RDWR = 0

537

CRD_CERTIFICATE = 1

538

E_NO_CERTIFICATE_FOUND = -49

539

X509_FMT_DER = 0

540

NO_TICKETS = 1<<10

541

ENABLE_RAWPK = 1<<18

542

CTYPE_PEERS = 3

543

KEYID_USE_SHA256 = 1 # gnutls/x509.h

544

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

545

546

# Types

547

class session_int(ctypes.Structure):

548

_fields_ = []

549

session_t = ctypes.POINTER(session_int)

550

551

class certificate_credentials_st(ctypes.Structure):

552

_fields_ = []

553

certificate_credentials_t = ctypes.POINTER(

554

certificate_credentials_st)

555

certificate_type_t = ctypes.c_int

556

557

class datum_t(ctypes.Structure):

558

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

559

('size', ctypes.c_uint)]

560

561

class openpgp_crt_int(ctypes.Structure):

562

_fields_ = []

563

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

564

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

565

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

566

credentials_type_t = ctypes.c_int

567

transport_ptr_t = ctypes.c_void_p

568

close_request_t = ctypes.c_int

569

570

# Exceptions

571

class Error(Exception):

572

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

573

# exception might be raised from within GnuTLS.__init__,

574

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

575

# global variable has happened.

576

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

577

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

578

# code is passed, convert it to a string with

579

# gnutls.strerror()

580

self.code = code

581

if message is None and code is not None:

582

message = GnuTLS.strerror(code)

583

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

584

message, *args)

585

586

class CertificateSecurityError(Error):

587

pass

588

589

# Classes

590

class Credentials(object):

591

def __init__(self):

592

self._c_object = gnutls.certificate_credentials_t()

593

gnutls.certificate_allocate_credentials(

594

ctypes.byref(self._c_object))

595

self.type = gnutls.CRD_CERTIFICATE

596

597

def __del__(self):

598

gnutls.certificate_free_credentials(self._c_object)

599

600

class ClientSession(object):

601

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

602

self._c_object = gnutls.session_t()

603

gnutls_flags = gnutls.CLIENT

604

if gnutls.check_version("3.5.6"):

605

gnutls_flags |= gnutls.NO_TICKETS

606

if gnutls.has_rawpk:

607

gnutls_flags |= gnutls.ENABLE_RAWPK

608

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

609

del gnutls_flags

610

gnutls.set_default_priority(self._c_object)

611

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

612

gnutls.handshake_set_private_extensions(self._c_object,

613

True)

614

self.socket = socket

615

if credentials is None:

616

credentials = gnutls.Credentials()

617

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

618

ctypes.cast(credentials._c_object,

619

ctypes.c_void_p))

620

self.credentials = credentials

621

622

def __del__(self):

623

gnutls.deinit(self._c_object)

624

625

def handshake(self):

626

return gnutls.handshake(self._c_object)

627

628

def send(self, data):

629

data = bytes(data)

630

data_len = len(data)

631

while data_len > 0:

632

data_len -= gnutls.record_send(self._c_object,

633

data[-data_len:],

634

data_len)

635

636

def bye(self):

637

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

638

639

# Error handling functions

640

def _error_code(result):

641

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

642

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

643

if result >= 0:

644

return result

645

if result == gnutls.E_NO_CERTIFICATE_FOUND:

646

raise gnutls.CertificateSecurityError(code=result)

647

raise gnutls.Error(code=result)

648

649

def _retry_on_error(result, func, arguments):

650

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

651

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

652

while result < 0:

653

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

654

return _error_code(result)

655

result = func(*arguments)

656

return result

657

658

# Unless otherwise indicated, the function declarations below are

659

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

660

661

# Functions

662

priority_set_direct = _library.gnutls_priority_set_direct

663

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

664

ctypes.POINTER(ctypes.c_char_p)]

665

priority_set_direct.restype = _error_code

666

667

init = _library.gnutls_init

668

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

669

init.restype = _error_code

670

671

set_default_priority = _library.gnutls_set_default_priority

672

set_default_priority.argtypes = [session_t]

673

set_default_priority.restype = _error_code

674

675

record_send = _library.gnutls_record_send

676

record_send.argtypes = [session_t, ctypes.c_void_p,

677

ctypes.c_size_t]

678

record_send.restype = ctypes.c_ssize_t

679

record_send.errcheck = _retry_on_error

680

681

certificate_allocate_credentials = (

682

_library.gnutls_certificate_allocate_credentials)

683

certificate_allocate_credentials.argtypes = [

684

ctypes.POINTER(certificate_credentials_t)]

685

certificate_allocate_credentials.restype = _error_code

686

687

certificate_free_credentials = (

688

_library.gnutls_certificate_free_credentials)

689

certificate_free_credentials.argtypes = [

690

certificate_credentials_t]

691

certificate_free_credentials.restype = None

692

693

handshake_set_private_extensions = (

694

_library.gnutls_handshake_set_private_extensions)

695

handshake_set_private_extensions.argtypes = [session_t,

696

ctypes.c_int]

697

handshake_set_private_extensions.restype = None

698

699

credentials_set = _library.gnutls_credentials_set

700

credentials_set.argtypes = [session_t, credentials_type_t,

701

ctypes.c_void_p]

702

credentials_set.restype = _error_code

703

704

strerror = _library.gnutls_strerror

705

strerror.argtypes = [ctypes.c_int]

706

strerror.restype = ctypes.c_char_p

707

708

certificate_type_get = _library.gnutls_certificate_type_get

709

certificate_type_get.argtypes = [session_t]

710

certificate_type_get.restype = _error_code

711

712

certificate_get_peers = _library.gnutls_certificate_get_peers

713

certificate_get_peers.argtypes = [session_t,

714

ctypes.POINTER(ctypes.c_uint)]

715

certificate_get_peers.restype = ctypes.POINTER(datum_t)

716

717

global_set_log_level = _library.gnutls_global_set_log_level

718

global_set_log_level.argtypes = [ctypes.c_int]

719

global_set_log_level.restype = None

720

721

global_set_log_function = _library.gnutls_global_set_log_function

722

global_set_log_function.argtypes = [log_func]

723

global_set_log_function.restype = None

724

725

deinit = _library.gnutls_deinit

726

deinit.argtypes = [session_t]

727

deinit.restype = None

728

729

handshake = _library.gnutls_handshake

730

handshake.argtypes = [session_t]

731

handshake.restype = _error_code

732

handshake.errcheck = _retry_on_error

733

734

transport_set_ptr = _library.gnutls_transport_set_ptr

735

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

736

transport_set_ptr.restype = None

737

738

bye = _library.gnutls_bye

739

bye.argtypes = [session_t, close_request_t]

740

bye.restype = _error_code

741

bye.errcheck = _retry_on_error

742

743

check_version = _library.gnutls_check_version

744

check_version.argtypes = [ctypes.c_char_p]

745

check_version.restype = ctypes.c_char_p

746

747

has_rawpk = bool(check_version(_tls_rawpk_version))

748

749

if has_rawpk:

750

# Types

751

class pubkey_st(ctypes.Structure):

752

_fields = []

753

pubkey_t = ctypes.POINTER(pubkey_st)

754

755

x509_crt_fmt_t = ctypes.c_int

756

757

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

758

pubkey_init = _library.gnutls_pubkey_init

759

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

760

pubkey_init.restype = _error_code

761

762

pubkey_import = _library.gnutls_pubkey_import

763

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

764

x509_crt_fmt_t]

765

pubkey_import.restype = _error_code

766

767

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

768

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

769

ctypes.POINTER(ctypes.c_ubyte),

770

ctypes.POINTER(ctypes.c_size_t)]

771

pubkey_get_key_id.restype = _error_code

772

773

pubkey_deinit = _library.gnutls_pubkey_deinit

774

pubkey_deinit.argtypes = [pubkey_t]

775

pubkey_deinit.restype = None

776

else:

777

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

778

779

openpgp_crt_init = _library.gnutls_openpgp_crt_init

780

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

781

openpgp_crt_init.restype = _error_code

782

783

openpgp_crt_import = _library.gnutls_openpgp_crt_import

784

openpgp_crt_import.argtypes = [openpgp_crt_t,

785

ctypes.POINTER(datum_t),

786

openpgp_crt_fmt_t]

787

openpgp_crt_import.restype = _error_code

788

789

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

790

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

791

ctypes.POINTER(ctypes.c_uint)]

792

openpgp_crt_verify_self.restype = _error_code

793

794

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

795

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

796

openpgp_crt_deinit.restype = None

797

798

openpgp_crt_get_fingerprint = (

799

_library.gnutls_openpgp_crt_get_fingerprint)

800

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

801

ctypes.c_void_p,

802

ctypes.POINTER(

803

ctypes.c_size_t)]

804

openpgp_crt_get_fingerprint.restype = _error_code

805

806

if check_version("3.6.4"):

807

certificate_type_get2 = _library.gnutls_certificate_type_get2

808

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

809

certificate_type_get2.restype = _error_code

810

811

# Remove non-public functions

812

del _error_code, _retry_on_error

813

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

814

gnutls = GnuTLS()

815

816

817

def call_pipe(connection, # : multiprocessing.Connection

818

func, *args, **kwargs):

819

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

820

821

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

822

return value on the provided multiprocessing.Connection.

823

"""

824

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

825

connection.close()

826

827

404

828

class Client(object):

405

829

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

406

830

407

831

Attributes:

408

832

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

409

833

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

411

835

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

412

836

to see if the client lives.

413

837

'None' if no process is running.

414

checker_callback_tag: a gobject event source tag, or None

838

checker_callback_tag: a GLib event source tag, or None

415

839

checker_command: string; External command which is run to check

416

840

if client lives. %() expansions are done at

417

841

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

418

842

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

419

checker_initiator_tag: a gobject event source tag, or None

843

checker_initiator_tag: a GLib event source tag, or None

420

844

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

421

845

client_structure: Object describing what attributes a client has

422

846

and is used for storing the client at exit

423

847

current_checker_command: string; current running checker_command

424

disable_initiator_tag: a gobject event source tag, or None

848

disable_initiator_tag: a GLib event source tag, or None

425

849

enabled: bool()

426

850

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

427

uniquely identify the client

851

uniquely identify an OpenPGP client

852

key_id: string (64 hexadecimal digits); used to uniquely identify

853

a client using raw public keys

428

854

host: string; available for use by the checker command

429

855

interval: datetime.timedelta(); How often to start a new checker

430

856

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

432

858

last_checker_status: integer between 0 and 255 reflecting exit

433

859

status of last checker. -1 reflects crashed

434

860

checker, -2 means no checker completed yet.

861

last_checker_signal: The signal which killed the last checker, if

862

last_checker_status is -1

435

863

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

436

864

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

437

865

D-Bus identifiers

444

872

disabled, or None

445

873

server_settings: The server_settings dict from main()

446

874

"""

447

875

448

876

runtime_expansions = ("approval_delay", "approval_duration",

449

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

877

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

450

878

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

451

879

"last_approval_request", "last_checked_ok",

452

880

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

453

client_defaults = { "timeout": "PT5M",

454

"extended_timeout": "PT15M",

455

"interval": "PT2M",

456

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

457

"host": "",

458

"approval_delay": "PT0S",

459

"approval_duration": "PT1S",

460

"approved_by_default": "True",

461

"enabled": "True",

462

}

463

881

client_defaults = {

882

"timeout": "PT5M",

883

"extended_timeout": "PT15M",

884

"interval": "PT2M",

885

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

886

"host": "",

887

"approval_delay": "PT0S",

888

"approval_duration": "PT1S",

889

"approved_by_default": "True",

890

"enabled": "True",

891

}

892

464

893

@staticmethod

465

894

def config_parser(config):

466

895

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

473

902

for client_name in config.sections():

474

903

section = dict(config.items(client_name))

475

904

client = settings[client_name] = {}

476

905

477

906

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

478

907

# Reformat values from string types to Python types

479

908

client["approved_by_default"] = config.getboolean(

480

909

client_name, "approved_by_default")

481

910

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

482

911

"enabled")

483

912

913

# Uppercase and remove spaces from key_id and fingerprint

914

# for later comparison purposes with return value from the

915

# key_id() and fingerprint() functions

916

client["key_id"] = (section.get("key_id", "").upper()

917

.replace(" ", ""))

484

918

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

485

919

.replace(" ", ""))

486

920

if "secret" in section:

487

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

921

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

922

.encode("utf-8"),

923

"base64")

488

924

elif "secfile" in section:

489

925

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

490

926

(section["secfile"])),

505

941

client["last_approval_request"] = None

506

942

client["last_checked_ok"] = None

507

943

client["last_checker_status"] = -2

508

944

509

945

return settings

510

511

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

946

947

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

512

948

self.name = name

513

949

if server_settings is None:

514

950

server_settings = {}

516

952

# adding all client settings

517

953

for setting, value in settings.items():

518

954

setattr(self, setting, value)

519

955

520

956

if self.enabled:

521

957

if not hasattr(self, "last_enabled"):

522

958

self.last_enabled = datetime.datetime.utcnow()

526

962

else:

527

963

self.last_enabled = None

528

964

self.expires = None

529

965

530

966

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

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the fingerprint()

533

# function

967

logger.debug(" Key ID: %s", self.key_id)

534

968

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

535

969

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

536

970

datetime.datetime.utcnow())

537

971

538

972

# attributes specific for this server instance

539

973

self.checker = None

540

974

self.checker_initiator_tag = None

543

977

self.current_checker_command = None

544

978

self.approved = None

545

979

self.approvals_pending = 0

546

self.changedstate = (multiprocessing_manager

547

.Condition(multiprocessing_manager

548

.Lock()))

549

self.client_structure = [attr for attr in

550

self.__dict__.iterkeys()

980

self.changedstate = multiprocessing_manager.Condition(

981

multiprocessing_manager.Lock())

982

self.client_structure = [attr

983

for attr in self.__dict__.keys()

551

984

if not attr.startswith("_")]

552

985

self.client_structure.append("client_structure")

553

554

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

555

lambda obj:

556

isinstance(obj,

557

property)):

986

987

for name, t in inspect.getmembers(

988

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

558

989

if not name.startswith("_"):

559

990

self.client_structure.append(name)

560

991

561

992

# Send notice to process children that client state has changed

562

993

def send_changedstate(self):

563

994

with self.changedstate:

564

995

self.changedstate.notify_all()

565

996

566

997

def enable(self):

567

998

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

568

999

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

573

1004

self.last_enabled = datetime.datetime.utcnow()

574

1005

self.init_checker()

575

1006

self.send_changedstate()

576

1007

577

1008

def disable(self, quiet=True):

578

1009

"""Disable this client."""

579

1010

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

581

1012

if not quiet:

582

1013

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

583

1014

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

584

gobject.source_remove(self.disable_initiator_tag)

1015

GLib.source_remove(self.disable_initiator_tag)

585

1016

self.disable_initiator_tag = None

586

1017

self.expires = None

587

1018

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

588

gobject.source_remove(self.checker_initiator_tag)

1019

GLib.source_remove(self.checker_initiator_tag)

589

1020

self.checker_initiator_tag = None

590

1021

self.stop_checker()

591

1022

self.enabled = False

592

1023

if not quiet:

593

1024

self.send_changedstate()

594

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

1025

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

595

1026

return False

596

1027

597

1028

def __del__(self):

598

1029

self.disable()

599

1030

600

1031

def init_checker(self):

601

1032

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

602

1033

# and every interval from then on.

603

1034

if self.checker_initiator_tag is not None:

604

gobject.source_remove(self.checker_initiator_tag)

605

self.checker_initiator_tag = (gobject.timeout_add

606

(int(self.interval

607

.total_seconds() * 1000),

608

self.start_checker))

1035

GLib.source_remove(self.checker_initiator_tag)

1036

self.checker_initiator_tag = GLib.timeout_add(

1037

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

1038

self.start_checker)

609

1039

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

610

1040

if self.disable_initiator_tag is not None:

611

gobject.source_remove(self.disable_initiator_tag)

612

self.disable_initiator_tag = (gobject.timeout_add

613

(int(self.timeout

614

.total_seconds() * 1000),

615

self.disable))

1041

GLib.source_remove(self.disable_initiator_tag)

1042

self.disable_initiator_tag = GLib.timeout_add(

1043

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

616

1044

# Also start a new checker *right now*.

617

1045

self.start_checker()

618

619

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

1046

1047

def checker_callback(self, source, condition, connection,

1048

command):

620

1049

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

621

1050

self.checker_callback_tag = None

622

1051

self.checker = None

623

if os.WIFEXITED(condition):

624

self.last_checker_status = os.WEXITSTATUS(condition)

1052

# Read return code from connection (see call_pipe)

1053

returncode = connection.recv()

1054

connection.close()

1055

1056

if returncode >= 0:

1057

self.last_checker_status = returncode

1058

self.last_checker_signal = None

625

1059

if self.last_checker_status == 0:

626

1060

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

627

1061

vars(self))

628

1062

self.checked_ok()

629

1063

else:

630

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

631

vars(self))

1064

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

632

1065

else:

633

1066

self.last_checker_status = -1

1067

self.last_checker_signal = -returncode

634

1068

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

635

1069

vars(self))

636

1070

return False

1071

637

1072

def checked_ok(self):

638

1073

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

639

1074

self.last_checked_ok = datetime.datetime.utcnow()

640

1075

self.last_checker_status = 0

1076

self.last_checker_signal = None

641

1077

self.bump_timeout()

642

1078

643

1079

def bump_timeout(self, timeout=None):

644

1080

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

645

1081

if timeout is None:

646

1082

timeout = self.timeout

647

1083

if self.disable_initiator_tag is not None:

648

gobject.source_remove(self.disable_initiator_tag)

1084

GLib.source_remove(self.disable_initiator_tag)

649

1085

self.disable_initiator_tag = None

650

1086

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

651

self.disable_initiator_tag = (gobject.timeout_add

652

(int(timeout.total_seconds()

653

* 1000), self.disable))

1087

self.disable_initiator_tag = GLib.timeout_add(

1088

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

654

1089

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

655

1090

656

1091

def need_approval(self):

657

1092

self.last_approval_request = datetime.datetime.utcnow()

658

1093

659

1094

def start_checker(self):

660

1095

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

661

1096

662

1097

If a checker already exists, leave it running and do

663

1098

nothing."""

664

1099

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

669

1104

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

670

1105

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

671

1106

# should be.

672

673

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

674

try:

675

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

676

except AttributeError:

677

pass

678

except OSError as error:

679

if error.errno != errno.ECHILD:

680

raise

681

else:

682

if pid:

683

logger.warning("Checker was a zombie")

684

gobject.source_remove(self.checker_callback_tag)

685

self.checker_callback(pid, status,

686

self.current_checker_command)

1107

1108

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

1109

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

1110

self.checker.join()

1111

self.checker = None

687

1112

# Start a new checker if needed

688

1113

if self.checker is None:

689

1114

# Escape attributes for the shell

690

escaped_attrs = { attr:

691

re.escape(unicode(getattr(self,

692

attr)))

693

for attr in self.runtime_expansions }

1115

escaped_attrs = {

1116

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

1117

for attr in self.runtime_expansions}

694

1118

try:

695

1119

command = self.checker_command % escaped_attrs

696

1120

except TypeError as error:

697

1121

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

698

self.checker_command, exc_info=error)

699

return True # Try again later

1122

self.checker_command,

1123

exc_info=error)

1124

return True # Try again later

700

1125

self.current_checker_command = command

701

try:

702

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

703

command, self.name)

704

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

705

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

706

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

707

# always replaced by /dev/null.)

708

# The exception is when not debugging but nevertheless

709

# running in the foreground; use the previously

710

# created wnull.

711

popen_args = {}

712

if (not self.server_settings["debug"]

713

and self.server_settings["foreground"]):

714

popen_args.update({"stdout": wnull,

715

"stderr": wnull })

716

self.checker = subprocess.Popen(command,

717

close_fds=True,

718

shell=True, cwd="/",

719

**popen_args)

720

except OSError as error:

721

logger.error("Failed to start subprocess",

722

exc_info=error)

723

return True

724

self.checker_callback_tag = (gobject.child_watch_add

725

(self.checker.pid,

726

self.checker_callback,

727

data=command))

728

# The checker may have completed before the gobject

729

# watch was added. Check for this.

730

try:

731

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

732

except OSError as error:

733

if error.errno == errno.ECHILD:

734

# This should never happen

735

logger.error("Child process vanished",

736

exc_info=error)

737

return True

738

raise

739

if pid:

740

gobject.source_remove(self.checker_callback_tag)

741

self.checker_callback(pid, status, command)

742

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

1126

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

1127

self.name)

1128

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

1129

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

1130

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

1131

# always replaced by /dev/null.)

1132

# The exception is when not debugging but nevertheless

1133

# running in the foreground; use the previously

1134

# created wnull.

1135

popen_args = {"close_fds": True,

1136

"shell": True,

1137

"cwd": "/"}

1138

if (not self.server_settings["debug"]

1139

and self.server_settings["foreground"]):

1140

popen_args.update({"stdout": wnull,

1141

"stderr": wnull})

1142

pipe = multiprocessing.Pipe(duplex=False)

1143

self.checker = multiprocessing.Process(

1144

target=call_pipe,

1145

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

1146

kwargs=popen_args)

1147

self.checker.start()

1148

self.checker_callback_tag = GLib.io_add_watch(

1149

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

1150

self.checker_callback, pipe[0], command)

1151

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

743

1152

return True

744

1153

745

1154

def stop_checker(self):

746

1155

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

747

1156

if self.checker_callback_tag:

748

gobject.source_remove(self.checker_callback_tag)

1157

GLib.source_remove(self.checker_callback_tag)

749

1158

self.checker_callback_tag = None

750

1159

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

751

1160

return

752

1161

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

753

try:

754

self.checker.terminate()

755

#time.sleep(0.5)

756

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

757

# self.checker.kill()

758

except OSError as error:

759

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

760

raise

1162

self.checker.terminate()

761

1163

self.checker = None

762

1164

763

1165

764

def dbus_service_property(dbus_interface, signature="v",

765

access="readwrite", byte_arrays=False):

1166

def dbus_service_property(dbus_interface,

1167

signature="v",

1168

access="readwrite",

1169

byte_arrays=False):

766

1170

"""Decorators for marking methods of a DBusObjectWithProperties to

767

1171

become properties on the D-Bus.

768

1172

769

1173

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

770

1174

and with one argument by "Set".

771

1175

772

1176

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

773

1177

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

774

1178

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

778

1182

if byte_arrays and signature != "ay":

779

1183

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

780

1184

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

1185

781

1186

def decorator(func):

782

1187

func._dbus_is_property = True

783

1188

func._dbus_interface = dbus_interface

786

1191

func._dbus_name = func.__name__

787

1192

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

788

1193

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

789

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

790

1195

return func

1196

791

1197

return decorator

792

1198

793

1199

794

1200

def dbus_interface_annotations(dbus_interface):

795

1201

"""Decorator for marking functions returning interface annotations

796

1202

797

1203

Usage:

798

1204

799

1205

@dbus_interface_annotations("org.example.Interface")

800

1206

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

801

1207

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

802

1208

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

803

1209

"false"}

804

1210

"""

1211

805

1212

def decorator(func):

806

1213

func._dbus_is_interface = True

807

1214

func._dbus_interface = dbus_interface

808

1215

func._dbus_name = dbus_interface

809

1216

return func

1217

810

1218

return decorator

811

1219

812

1220

813

1221

def dbus_annotations(annotations):

814

1222

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

815

1223

Usage:

816

1224

1225

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

1226

"org.freedesktop.DBus.Property."

1227

"EmitsChangedSignal": "false"})

817

1228

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

818

1229

access="r")

819

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

820

"org.freedesktop.DBus.Property."

821

"EmitsChangedSignal": "false"})

822

1230

def Property_dbus_property(self):

823

1231

return dbus.Boolean(False)

1232

1233

See also the DBusObjectWithAnnotations class.

824

1234

"""

1235

825

1236

def decorator(func):

826

1237

func._dbus_annotations = annotations

827

1238

return func

1239

828

1240

return decorator

829

1241

830

1242

831

1243

class DBusPropertyException(dbus.exceptions.DBusException):

832

1244

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

833

1245

"""

834

def __unicode__(self):

835

return unicode(str(self))

1246

pass

836

1247

837

1248

838

1249

class DBusPropertyAccessException(DBusPropertyException):

847

1258

pass

848

1259

849

1260

850

class DBusObjectWithProperties(dbus.service.Object):

851

"""A D-Bus object with properties.

852

853

Classes inheriting from this can use the dbus_service_property

854

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

855

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

1261

class DBusObjectWithAnnotations(dbus.service.Object):

1262

"""A D-Bus object with annotations.

1263

1264

Classes inheriting from this can use the dbus_annotations

1265

decorator to add annotations to methods or signals.

856

1266

"""

857

1267

858

1268

@staticmethod

859

1269

def _is_dbus_thing(thing):

860

1270

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

861

1271

862

1272

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

863

1273

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

864

1274

"""

865

1275

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

866

1276

False)

867

1277

868

1278

def _get_all_dbus_things(self, thing):

869

1279

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

870

1280

"""

871

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

872

name),

1281

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

873

1282

athing.__get__(self))

874

1283

for cls in self.__class__.__mro__

875

1284

for name, athing in

876

inspect.getmembers(cls,

877

self._is_dbus_thing(thing)))

878

1285

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

1286

1287

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1288

out_signature="s",

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1291

def Introspect(self, object_path, connection):

1292

"""Overloading of standard D-Bus method.

1293

1294

Inserts annotation tags on methods and signals.

1295

"""

1296

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

1297

connection)

1298

try:

1299

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

1300

1301

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

1302

# Add annotation tags

1303

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

1304

for tag in if_tag.getElementsByTagName(typ):

1305

annots = dict()

1306

for name, prop in (self.

1307

_get_all_dbus_things(typ)):

1308

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

1309

and prop._dbus_interface

1310

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

1311

annots.update(getattr(

1312

prop, "_dbus_annotations", {}))

1313

for name, value in annots.items():

1314

ann_tag = document.createElement(

1315

"annotation")

1316

ann_tag.setAttribute("name", name)

1317

ann_tag.setAttribute("value", value)

1318

tag.appendChild(ann_tag)

1319

# Add interface annotation tags

1320

for annotation, value in dict(

1321

itertools.chain.from_iterable(

1322

annotations().items()

1323

for name, annotations

1324

in self._get_all_dbus_things("interface")

1325

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

1326

)).items():

1327

ann_tag = document.createElement("annotation")

1328

ann_tag.setAttribute("name", annotation)

1329

ann_tag.setAttribute("value", value)

1330

if_tag.appendChild(ann_tag)

1331

# Fix argument name for the Introspect method itself

1332

if (if_tag.getAttribute("name")

1333

== dbus.INTROSPECTABLE_IFACE):

1334

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

1335

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

1336

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

1337

if (arg.getAttribute("direction")

1338

== "out"):

1339

arg.setAttribute("name",

1340

"xml_data")

1341

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

1342

document.unlink()

1343

except (AttributeError, xml.dom.DOMException,

1344

xml.parsers.expat.ExpatError) as error:

1345

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

1346

exc_info=error)

1347

return xmlstring

1348

1349

1350

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1351

"""A D-Bus object with properties.

1352

1353

Classes inheriting from this can use the dbus_service_property

1354

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

1355

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

1356

"""

1357

879

1358

def _get_dbus_property(self, interface_name, property_name):

880

1359

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

881

1360

property with the specified name and interface.

882

1361

"""

883

for cls in self.__class__.__mro__:

884

for name, value in (inspect.getmembers

885

(cls,

886

self._is_dbus_thing("property"))):

1362

for cls in self.__class__.__mro__:

1363

for name, value in inspect.getmembers(

1364

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

887

1365

if (value._dbus_name == property_name

888

1366

and value._dbus_interface == interface_name):

889

1367

return value.__get__(self)

890

1368

891

1369

# No such property

892

raise DBusPropertyNotFound(self.dbus_object_path + ":"

893

+ interface_name + "."

894

+ property_name)

895

896

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

1370

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

1371

self.dbus_object_path, interface_name, property_name))

1372

1373

@classmethod

1374

def _get_all_interface_names(cls):

1375

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

1376

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

1377

"_dbus_interface", None)

1378

for x in (inspect.getmro(cls))

1379

for attr in dir(x))

1380

if name is not None)

1381

1382

@dbus.service.method(dbus.PROPERTIES_IFACE,

1383

in_signature="ss",

897

1384

out_signature="v")

898

1385

def Get(self, interface_name, property_name):

899

1386

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

905

1392

if not hasattr(value, "variant_level"):

906

1393

return value

907

1394

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

908

1395

909

1396

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

910

1397

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

911

1398

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

923

1410

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

924

1411

for byte in value))

925

1412

prop(value)

926

927

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

1413

1414

@dbus.service.method(dbus.PROPERTIES_IFACE,

1415

in_signature="s",

928

1416

out_signature="a{sv}")

929

1417

def GetAll(self, interface_name):

930

1418

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

931

1419

standard.

932

1420

933

1421

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

934

1422

"""

935

1423

properties = {}

945

1433

if not hasattr(value, "variant_level"):

946

1434

properties[name] = value

947

1435

continue

948

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

949

value.variant_level+1)

1436

properties[name] = type(value)(

1437

value, variant_level=value.variant_level + 1)

950

1438

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

951

1439

1440

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

1441

def PropertiesChanged(self, interface_name, changed_properties,

1442

invalidated_properties):

1443

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

1444

standard.

1445

"""

1446

pass

1447

952

1448

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

953

1449

out_signature="s",

954

1450

path_keyword='object_path',

955

1451

connection_keyword='connection')

956

1452

def Introspect(self, object_path, connection):

957

1453

"""Overloading of standard D-Bus method.

958

1454

959

1455

Inserts property tags and interface annotation tags.

960

1456

"""

961

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

962

connection)

1457

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1458

object_path,

1459

connection)

963

1460

try:

964

1461

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

1462

965

1463

def make_tag(document, name, prop):

966

1464

e = document.createElement("property")

967

1465

e.setAttribute("name", name)

968

1466

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

969

1467

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

970

1468

return e

1469

971

1470

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

972

1471

# Add property tags

973

1472

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

976

1475

if prop._dbus_interface

977

1476

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

978

1477

if_tag.appendChild(tag)

979

# Add annotation tags

980

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

981

for tag in if_tag.getElementsByTagName(typ):

982

annots = dict()

983

for name, prop in (self.

984

_get_all_dbus_things(typ)):

985

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

986

and prop._dbus_interface

987

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

988

annots.update(getattr

989

(prop,

990

"_dbus_annotations",

991

{}))

992

for name, value in annots.items():

993

ann_tag = document.createElement(

994

"annotation")

995

ann_tag.setAttribute("name", name)

996

ann_tag.setAttribute("value", value)

997

tag.appendChild(ann_tag)

998

# Add interface annotation tags

999

for annotation, value in dict(

1000

itertools.chain.from_iterable(

1001

annotations().items()

1002

for name, annotations in

1003

self._get_all_dbus_things("interface")

1004

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

1005

)).items():

1006

ann_tag = document.createElement("annotation")

1007

ann_tag.setAttribute("name", annotation)

1008

ann_tag.setAttribute("value", value)

1009

if_tag.appendChild(ann_tag)

1478

# Add annotation tags for properties

1479

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

1480

annots = dict()

1481

for name, prop in self._get_all_dbus_things(

1482

"property"):

1483

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

1484

and prop._dbus_interface

1485

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

1486

annots.update(getattr(

1487

prop, "_dbus_annotations", {}))

1488

for name, value in annots.items():

1489

ann_tag = document.createElement(

1490

"annotation")

1491

ann_tag.setAttribute("name", name)

1492

ann_tag.setAttribute("value", value)

1493

tag.appendChild(ann_tag)

1010

1494

# Add the names to the return values for the

1011

1495

# "org.freedesktop.DBus.Properties" methods

1012

1496

if (if_tag.getAttribute("name")

1031

1515

return xmlstring

1032

1516

1033

1517

1518

try:

1519

dbus.OBJECT_MANAGER_IFACE

1520

except AttributeError:

1521

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

1522

1523

1524

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1525

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

1526

1527

Classes inheriting from this exposes the standard

1528

GetManagedObjects call and the InterfacesAdded and

1529

InterfacesRemoved signals on the standard

1530

"org.freedesktop.DBus.ObjectManager" interface.

1531

1532

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

1533

manually.

1534

"""

1535

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def GetManagedObjects(self):

1538

"""This function must be overridden"""

1539

raise NotImplementedError()

1540

1541

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1542

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

1543

def InterfacesAdded(self, object_path, interfaces_and_properties):

1544

pass

1545

1546

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

1547

def InterfacesRemoved(self, object_path, interfaces):

1548

pass

1549

1550

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1551

out_signature="s",

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1554

def Introspect(self, object_path, connection):

1555

"""Overloading of standard D-Bus method.

1556

1557

Override return argument name of GetManagedObjects to be

1558

"objpath_interfaces_and_properties"

1559

"""

1560

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1561

object_path,

1562

connection)

1563

try:

1564

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

1565

1566

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

1567

# Fix argument name for the GetManagedObjects method

1568

if (if_tag.getAttribute("name")

1569

== dbus.OBJECT_MANAGER_IFACE):

1570

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

1571

if (cn.getAttribute("name")

1572

== "GetManagedObjects"):

1573

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

1574

if (arg.getAttribute("direction")

1575

== "out"):

1576

arg.setAttribute(

1577

"name",

1578

"objpath_interfaces"

1579

"_and_properties")

1580

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

1581

document.unlink()

1582

except (AttributeError, xml.dom.DOMException,

1583

xml.parsers.expat.ExpatError) as error:

1584

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

1585

exc_info=error)

1586

return xmlstring

1587

1588

1034

1589

def datetime_to_dbus(dt, variant_level=0):

1035

1590

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

1036

1591

if dt is None:

1037

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

1038

return dbus.String(dt.isoformat(),

1039

variant_level=variant_level)

1592

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

1593

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

1040

1594

1041

1595

1042

1596

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1044

1598

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

1045

1599

interface names according to the "alt_interface_names" mapping.

1046

1600

Usage:

1047

1601

1048

1602

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

1049

1603

"net.example.AlternateInterface"})

1050

1604

class SampleDBusObject(dbus.service.Object):

1051

1605

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

1052

1606

def SampleDBusMethod():

1053

1607

pass

1054

1608

1055

1609

The above "SampleDBusMethod" on "SampleDBusObject" will be

1056

1610

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

1057

1611

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

1058

1612

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

1059

1613

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

1060

1614

1061

1615

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

1062

1616

(from DBusObjectWithProperties) and interfaces (from the

1063

1617

dbus_interface_annotations decorator).

1064

1618

"""

1619

1065

1620

def wrapper(cls):

1066

1621

for orig_interface_name, alt_interface_name in (

1067

alt_interface_names.items()):

1622

alt_interface_names.items()):

1068

1623

attr = {}

1069

1624

interface_names = set()

1070

1625

# Go though all attributes of the class

1072

1627

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

1073

1628

# with the wrong interface name

1074

1629

if (not hasattr(attribute, "_dbus_interface")

1075

or not attribute._dbus_interface

1076

.startswith(orig_interface_name)):

1630

or not attribute._dbus_interface.startswith(

1631

orig_interface_name)):

1077

1632

continue

1078

1633

# Create an alternate D-Bus interface name based on

1079

1634

# the current name

1080

alt_interface = (attribute._dbus_interface

1081

.replace(orig_interface_name,

1082

alt_interface_name))

1635

alt_interface = attribute._dbus_interface.replace(

1636

orig_interface_name, alt_interface_name)

1083

1637

interface_names.add(alt_interface)

1084

1638

# Is this a D-Bus signal?

1085

1639

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

1086

1640

# Extract the original non-method undecorated

1087

1641

# function by black magic

1088

nonmethod_func = (dict(

1642

if sys.version_info.major == 2:

1643

nonmethod_func = (dict(

1089

1644

zip(attribute.func_code.co_freevars,

1090

attribute.__closure__))["func"]

1091

.cell_contents)

1645

attribute.__closure__))

1646

["func"].cell_contents)

1647

else:

1648

nonmethod_func = (dict(

1649

zip(attribute.__code__.co_freevars,

1650

attribute.__closure__))

1651

["func"].cell_contents)

1092

1652

# Create a new, but exactly alike, function

1093

1653

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

1094

1654

# with the alternate D-Bus interface name

1095

new_function = (dbus.service.signal

1096

(alt_interface,

1097

attribute._dbus_signature)

1098

(types.FunctionType(

1099

nonmethod_func.func_code,

1100

nonmethod_func.func_globals,

1101

nonmethod_func.func_name,

1102

nonmethod_func.func_defaults,

1103

nonmethod_func.func_closure)))

1655

new_function = copy_function(nonmethod_func)

1656

new_function = (dbus.service.signal(

1657

alt_interface,

1658

attribute._dbus_signature)(new_function))

1104

1659

# Copy annotations, if any

1105

1660

try:

1106

new_function._dbus_annotations = (

1107

dict(attribute._dbus_annotations))

1661

new_function._dbus_annotations = dict(

1662

attribute._dbus_annotations)

1108

1663

except AttributeError:

1109

1664

pass

1665

1110

1666

# Define a creator of a function to call both the

1111

1667

# original and alternate functions, so both the

1112

1668

# original and alternate signals gets sent when

1115

1671

"""This function is a scope container to pass

1116

1672

func1 and func2 to the "call_both" function

1117

1673

outside of its arguments"""

1674

1675

@functools.wraps(func2)

1118

1676

def call_both(*args, **kwargs):

1119

1677

"""This function will emit two D-Bus

1120

1678

signals by calling func1 and func2"""

1121

1679

func1(*args, **kwargs)

1122

1680

func2(*args, **kwargs)

1681

# Make wrapper function look like a D-Bus

1682

# signal

1683

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

1684

if name.startswith("_dbus_"):

1685

setattr(call_both, name, attr)

1686

1123

1687

return call_both

1124

1688

# Create the "call_both" function and add it to

1125

1689

# the class

1130

1694

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

1131

1695

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

1132

1696

# to the class.

1133

attr[attrname] = (dbus.service.method

1134

(alt_interface,

1135

attribute._dbus_in_signature,

1136

attribute._dbus_out_signature)

1137

(types.FunctionType

1138

(attribute.func_code,

1139

attribute.func_globals,

1140

attribute.func_name,

1141

attribute.func_defaults,

1142

attribute.func_closure)))

1697

attr[attrname] = (

1698

dbus.service.method(

1699

alt_interface,

1700

attribute._dbus_in_signature,

1701

attribute._dbus_out_signature)

1702

(copy_function(attribute)))

1143

1703

# Copy annotations, if any

1144

1704

try:

1145

attr[attrname]._dbus_annotations = (

1146

dict(attribute._dbus_annotations))

1705

attr[attrname]._dbus_annotations = dict(

1706

attribute._dbus_annotations)

1147

1707

except AttributeError:

1148

1708

pass

1149

1709

# Is this a D-Bus property?

1152

1712

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

1153

1713

# property with the alternate D-Bus interface

1154

1714

# name. Add it to the class.

1155

attr[attrname] = (dbus_service_property

1156

(alt_interface,

1157

attribute._dbus_signature,

1158

attribute._dbus_access,

1159

attribute

1160

._dbus_get_args_options

1161

["byte_arrays"])

1162

(types.FunctionType

1163

(attribute.func_code,

1164

attribute.func_globals,

1165

attribute.func_name,

1166

attribute.func_defaults,

1167

attribute.func_closure)))

1715

attr[attrname] = (dbus_service_property(

1716

alt_interface, attribute._dbus_signature,

1717

attribute._dbus_access,

1718

attribute._dbus_get_args_options

1719

["byte_arrays"])

1720

(copy_function(attribute)))

1168

1721

# Copy annotations, if any

1169

1722

try:

1170

attr[attrname]._dbus_annotations = (

1171

dict(attribute._dbus_annotations))

1723

attr[attrname]._dbus_annotations = dict(

1724

attribute._dbus_annotations)

1172

1725

except AttributeError:

1173

1726

pass

1174

1727

# Is this a D-Bus interface?

1177

1730

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

1178

1731

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

1179

1732

# to the class.

1180

attr[attrname] = (dbus_interface_annotations

1181

(alt_interface)

1182

(types.FunctionType

1183

(attribute.func_code,

1184

attribute.func_globals,

1185

attribute.func_name,

1186

attribute.func_defaults,

1187

attribute.func_closure)))

1733

attr[attrname] = (

1734

dbus_interface_annotations(alt_interface)

1735

(copy_function(attribute)))

1188

1736

if deprecate:

1189

1737

# Deprecate all alternate interfaces

1190

iname="_AlternateDBusNames_interface_annotation{}"

1738

iname = "_AlternateDBusNames_interface_annotation{}"

1191

1739

for interface_name in interface_names:

1740

1192

1741

@dbus_interface_annotations(interface_name)

1193

1742

def func(self):

1194

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

1195

"true" }

1743

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

1744

"true"}

1196

1745

# Find an unused name

1197

1746

for aname in (iname.format(i)

1198

1747

for i in itertools.count()):

1202

1751

if interface_names:

1203

1752

# Replace the class with a new subclass of it with

1204

1753

# methods, signals, etc. as created above.

1205

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

1206

(cls,), attr)

1754

if sys.version_info.major == 2:

1755

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

1756

(cls, ), attr)

1757

else:

1758

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

1759

(cls, ), attr)

1207

1760

return cls

1761

1208

1762

return wrapper

1209

1763

1210

1764

1211

1765

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

1212

"se.bsnet.fukt.Mandos"})

1766

"se.bsnet.fukt.Mandos"})

1213

1767

class ClientDBus(Client, DBusObjectWithProperties):

1214

1768

"""A Client class using D-Bus

1215

1769

1216

1770

Attributes:

1217

1771

dbus_object_path: dbus.ObjectPath

1218

1772

bus: dbus.SystemBus()

1219

1773

"""

1220

1774

1221

1775

runtime_expansions = (Client.runtime_expansions

1222

+ ("dbus_object_path",))

1223

1776

+ ("dbus_object_path", ))

1777

1778

_interface = "se.recompile.Mandos.Client"

1779

1224

1780

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

1225

1226

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

1781

1782

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

1227

1783

self.bus = bus

1228

1784

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

1229

1785

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

1230

1786

# the D-Bus

1231

client_object_name = unicode(self.name).translate(

1787

client_object_name = str(self.name).translate(

1232

1788

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

1233

1789

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

1234

self.dbus_object_path = (dbus.ObjectPath

1235

("/clients/" + client_object_name))

1790

self.dbus_object_path = dbus.ObjectPath(

1791

"/clients/" + client_object_name)

1236

1792

DBusObjectWithProperties.__init__(self, self.bus,

1237

1793

self.dbus_object_path)

1238

1239

def notifychangeproperty(transform_func,

1240

dbus_name, type_func=lambda x: x,

1241

variant_level=1):

1794

1795

def notifychangeproperty(transform_func, dbus_name,

1796

type_func=lambda x: x,

1797

variant_level=1,

1798

invalidate_only=False,

1799

_interface=_interface):

1242

1800

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

1243

1801

its changes to DBus.

1244

1802

1245

1803

transform_fun: Function that takes a value and a variant_level

1246

1804

and transforms it to a D-Bus type.

1247

1805

dbus_name: D-Bus name of the variable

1250

1808

variant_level: D-Bus variant level. Default: 1

1251

1809

"""

1252

1810

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

1811

1253

1812

def setter(self, value):

1254

1813

if hasattr(self, "dbus_object_path"):

1255

1814

if (not hasattr(self, attrname) or

1256

1815

type_func(getattr(self, attrname, None))

1257

1816

!= type_func(value)):

1258

dbus_value = transform_func(type_func(value),

1259

variant_level

1260

=variant_level)

1261

self.PropertyChanged(dbus.String(dbus_name),

1262

dbus_value)

1817

if invalidate_only:

1818

self.PropertiesChanged(

1819

_interface, dbus.Dictionary(),

1820

dbus.Array((dbus_name, )))

1821

else:

1822

dbus_value = transform_func(

1823

type_func(value),

1824

variant_level=variant_level)

1825

self.PropertyChanged(dbus.String(dbus_name),

1826

dbus_value)

1827

self.PropertiesChanged(

1828

_interface,

1829

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

1830

dbus_value}),

1831

dbus.Array())

1263

1832

setattr(self, attrname, value)

1264

1833

1265

1834

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

1266

1835

1267

1836

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1268

1837

approvals_pending = notifychangeproperty(dbus.Boolean,

1269

1838

"ApprovalPending",

1270

type_func = bool)

1839

type_func=bool)

1271

1840

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

1272

1841

last_enabled = notifychangeproperty(datetime_to_dbus,

1273

1842

"LastEnabled")

1274

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

1275

type_func = lambda checker:

1276

checker is not None)

1843

checker = notifychangeproperty(

1844

dbus.Boolean, "CheckerRunning",

1845

type_func=lambda checker: checker is not None)

1277

1846

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1278

1847

"LastCheckedOK")

1279

1848

last_checker_status = notifychangeproperty(dbus.Int16,

1282

1851

datetime_to_dbus, "LastApprovalRequest")

1283

1852

approved_by_default = notifychangeproperty(dbus.Boolean,

1284

1853

"ApprovedByDefault")

1285

approval_delay = notifychangeproperty(dbus.UInt64,

1286

"ApprovalDelay",

1287

type_func =

1288

lambda td: td.total_seconds()

1289

* 1000)

1854

approval_delay = notifychangeproperty(

1855

dbus.UInt64, "ApprovalDelay",

1856

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

1290

1857

approval_duration = notifychangeproperty(

1291

1858

dbus.UInt64, "ApprovalDuration",

1292

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

1859

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

1293

1860

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

1294

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

1295

type_func = lambda td:

1296

td.total_seconds() * 1000)

1861

timeout = notifychangeproperty(

1862

dbus.UInt64, "Timeout",

1863

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

1297

1864

extended_timeout = notifychangeproperty(

1298

1865

dbus.UInt64, "ExtendedTimeout",

1299

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

1300

interval = notifychangeproperty(dbus.UInt64,

1301

"Interval",

1302

type_func =

1303

lambda td: td.total_seconds()

1304

* 1000)

1866

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

1867

interval = notifychangeproperty(

1868

dbus.UInt64, "Interval",

1869

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

1305

1870

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

1306

1871

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

1872

invalidate_only=True)

1873

1307

1874

del notifychangeproperty

1308

1875

1309

1876

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

1310

1877

try:

1311

1878

self.remove_from_connection()

1314

1881

if hasattr(DBusObjectWithProperties, "__del__"):

1315

1882

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

1316

1883

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

1317

1318

def checker_callback(self, pid, condition, command,

1319

*args, **kwargs):

1320

self.checker_callback_tag = None

1321

self.checker = None

1322

if os.WIFEXITED(condition):

1323

exitstatus = os.WEXITSTATUS(condition)

1884

1885

def checker_callback(self, source, condition,

1886

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

1887

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

1888

connection, command, *args,

1889

**kwargs)

1890

exitstatus = self.last_checker_status

1891

if exitstatus >= 0:

1324

1892

# Emit D-Bus signal

1325

1893

self.CheckerCompleted(dbus.Int16(exitstatus),

1326

dbus.Int64(condition),

1894

# This is specific to GNU libC

1895

dbus.Int64(exitstatus << 8),

1327

1896

dbus.String(command))

1328

1897

else:

1329

1898

# Emit D-Bus signal

1330

1899

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

1331

dbus.Int64(condition),

1900

dbus.Int64(

1901

# This is specific to GNU libC

1902

(exitstatus << 8)

1903

| self.last_checker_signal),

1332

1904

dbus.String(command))

1333

1334

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

1335

*args, **kwargs)

1336

1905

return ret

1906

1337

1907

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

1338

1908

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

1339

1909

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

1343

1913

# Emit D-Bus signal

1344

1914

self.CheckerStarted(self.current_checker_command)

1345

1915

return r

1346

1916

1347

1917

def _reset_approved(self):

1348

1918

self.approved = None

1349

1919

return False

1350

1920

1351

1921

def approve(self, value=True):

1352

1922

self.approved = value

1353

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

1354

* 1000), self._reset_approved)

1923

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

1924

* 1000), self._reset_approved)

1355

1925

self.send_changedstate()

1356

1357

## D-Bus methods, signals & properties

1358

_interface = "se.recompile.Mandos.Client"

1359

1360

## Interfaces

1361

1362

@dbus_interface_annotations(_interface)

1363

def _foo(self):

1364

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

1365

"false"}

1366

1367

## Signals

1368

1926

1927

# D-Bus methods, signals & properties

1928

1929

# Interfaces

1930

1931

# Signals

1932

1369

1933

# CheckerCompleted - signal

1370

1934

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

1371

1935

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

1372

1936

"D-Bus signal"

1373

1937

pass

1374

1938

1375

1939

# CheckerStarted - signal

1376

1940

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

1377

1941

def CheckerStarted(self, command):

1378

1942

"D-Bus signal"

1379

1943

pass

1380

1944

1381

1945

# PropertyChanged - signal

1946

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

1382

1947

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

1383

1948

def PropertyChanged(self, property, value):

1384

1949

"D-Bus signal"

1385

1950

pass

1386

1951

1387

1952

# GotSecret - signal

1388

1953

@dbus.service.signal(_interface)

1389

1954

def GotSecret(self):

1392

1957

server to mandos-client

1393

1958

"""

1394

1959

pass

1395

1960

1396

1961

# Rejected - signal

1397

1962

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

1398

1963

def Rejected(self, reason):

1399

1964

"D-Bus signal"

1400

1965

pass

1401

1966

1402

1967

# NeedApproval - signal

1403

1968

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

1404

1969

def NeedApproval(self, timeout, default):

1405

1970

"D-Bus signal"

1406

1971

return self.need_approval()

1407

1408

## Methods

1409

1972

1973

# Methods

1974

1410

1975

# Approve - method

1411

1976

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

1412

1977

def Approve(self, value):

1413

1978

self.approve(value)

1414

1979

1415

1980

# CheckedOK - method

1416

1981

@dbus.service.method(_interface)

1417

1982

def CheckedOK(self):

1418

1983

self.checked_ok()

1419

1984

1420

1985

# Enable - method

1986

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

1421

1987

@dbus.service.method(_interface)

1422

1988

def Enable(self):

1423

1989

"D-Bus method"

1424

1990

self.enable()

1425

1991

1426

1992

# StartChecker - method

1993

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

1427

1994

@dbus.service.method(_interface)

1428

1995

def StartChecker(self):

1429

1996

"D-Bus method"

1430

1997

self.start_checker()

1431

1998

1432

1999

# Disable - method

2000

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

1433

2001

@dbus.service.method(_interface)

1434

2002

def Disable(self):

1435

2003

"D-Bus method"

1436

2004

self.disable()

1437

2005

1438

2006

# StopChecker - method

2007

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

1439

2008

@dbus.service.method(_interface)

1440

2009

def StopChecker(self):

1441

2010

self.stop_checker()

1442

1443

## Properties

1444

2011

2012

# Properties

2013

1445

2014

# ApprovalPending - property

1446

2015

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

1447

2016

def ApprovalPending_dbus_property(self):

1448

2017

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

1449

2018

1450

2019

# ApprovedByDefault - property

1451

@dbus_service_property(_interface, signature="b",

2020

@dbus_service_property(_interface,

2021

signature="b",

1452

2022

access="readwrite")

1453

2023

def ApprovedByDefault_dbus_property(self, value=None):

1454

2024

if value is None: # get

1455

2025

return dbus.Boolean(self.approved_by_default)

1456

2026

self.approved_by_default = bool(value)

1457

2027

1458

2028

# ApprovalDelay - property

1459

@dbus_service_property(_interface, signature="t",

2029

@dbus_service_property(_interface,

2030

signature="t",

1460

2031

access="readwrite")

1461

2032

def ApprovalDelay_dbus_property(self, value=None):

1462

2033

if value is None: # get

1463

2034

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

1464

2035

* 1000)

1465

2036

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

1466

2037

1467

2038

# ApprovalDuration - property

1468

@dbus_service_property(_interface, signature="t",

2039

@dbus_service_property(_interface,

2040

signature="t",

1469

2041

access="readwrite")

1470

2042

def ApprovalDuration_dbus_property(self, value=None):

1471

2043

if value is None: # get

1472

2044

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

1473

2045

* 1000)

1474

2046

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

1475

2047

1476

2048

# Name - property

2049

@dbus_annotations(

2050

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

1477

2051

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

1478

2052

def Name_dbus_property(self):

1479

2053

return dbus.String(self.name)

1480

2054

2055

# KeyID - property

2056

@dbus_annotations(

2057

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

2058

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

2059

def KeyID_dbus_property(self):

2060

return dbus.String(self.key_id)

2061

1481

2062

# Fingerprint - property

2063

@dbus_annotations(

2064

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

1482

2065

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

1483

2066

def Fingerprint_dbus_property(self):

1484

2067

return dbus.String(self.fingerprint)

1485

2068

1486

2069

# Host - property

1487

@dbus_service_property(_interface, signature="s",

2070

@dbus_service_property(_interface,

2071

signature="s",

1488

2072

access="readwrite")

1489

2073

def Host_dbus_property(self, value=None):

1490

2074

if value is None: # get

1491

2075

return dbus.String(self.host)

1492

self.host = unicode(value)

1493

2076

self.host = str(value)

2077

1494

2078

# Created - property

2079

@dbus_annotations(

2080

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

1495

2081

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

1496

2082

def Created_dbus_property(self):

1497

2083

return datetime_to_dbus(self.created)

1498

2084

1499

2085

# LastEnabled - property

1500

2086

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

1501

2087

def LastEnabled_dbus_property(self):

1502

2088

return datetime_to_dbus(self.last_enabled)

1503

2089

1504

2090

# Enabled - property

1505

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1506

2093

access="readwrite")

1507

2094

def Enabled_dbus_property(self, value=None):

1508

2095

if value is None: # get

1511

2098

self.enable()

1512

2099

else:

1513

2100

self.disable()

1514

2101

1515

2102

# LastCheckedOK - property

1516

@dbus_service_property(_interface, signature="s",

2103

@dbus_service_property(_interface,

2104

signature="s",

1517

2105

access="readwrite")

1518

2106

def LastCheckedOK_dbus_property(self, value=None):

1519

2107

if value is not None:

1520

2108

self.checked_ok()

1521

2109

return

1522

2110

return datetime_to_dbus(self.last_checked_ok)

1523

2111

1524

2112

# LastCheckerStatus - property

1525

@dbus_service_property(_interface, signature="n",

1526

access="read")

2113

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

1527

2114

def LastCheckerStatus_dbus_property(self):

1528

2115

return dbus.Int16(self.last_checker_status)

1529

2116

1530

2117

# Expires - property

1531

2118

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

1532

2119

def Expires_dbus_property(self):

1533

2120

return datetime_to_dbus(self.expires)

1534

2121

1535

2122

# LastApprovalRequest - property

1536

2123

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

1537

2124

def LastApprovalRequest_dbus_property(self):

1538

2125

return datetime_to_dbus(self.last_approval_request)

1539

2126

1540

2127

# Timeout - property

1541

@dbus_service_property(_interface, signature="t",

2128

@dbus_service_property(_interface,

2129

signature="t",

1542

2130

access="readwrite")

1543

2131

def Timeout_dbus_property(self, value=None):

1544

2132

if value is None: # get

1556

2144

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

1557

2145

is None):

1558

2146

return

1559

gobject.source_remove(self.disable_initiator_tag)

1560

self.disable_initiator_tag = (

1561

gobject.timeout_add(

1562

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

1563

* 1000), self.disable))

1564

2147

GLib.source_remove(self.disable_initiator_tag)

2148

self.disable_initiator_tag = GLib.timeout_add(

2149

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

2150

self.disable)

2151

1565

2152

# ExtendedTimeout - property

1566

@dbus_service_property(_interface, signature="t",

2153

@dbus_service_property(_interface,

2154

signature="t",

1567

2155

access="readwrite")

1568

2156

def ExtendedTimeout_dbus_property(self, value=None):

1569

2157

if value is None: # get

1570

2158

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

1571

2159

* 1000)

1572

2160

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

1573

2161

1574

2162

# Interval - property

1575

@dbus_service_property(_interface, signature="t",

2163

@dbus_service_property(_interface,

2164

signature="t",

1576

2165

access="readwrite")

1577

2166

def Interval_dbus_property(self, value=None):

1578

2167

if value is None: # get

1582

2171

return

1583

2172

if self.enabled:

1584

2173

# Reschedule checker run

1585

gobject.source_remove(self.checker_initiator_tag)

1586

self.checker_initiator_tag = (gobject.timeout_add

1587

(value, self.start_checker))

1588

self.start_checker() # Start one now, too

1589

2174

GLib.source_remove(self.checker_initiator_tag)

2175

self.checker_initiator_tag = GLib.timeout_add(

2176

value, self.start_checker)

2177

self.start_checker() # Start one now, too

2178

1590

2179

# Checker - property

1591

@dbus_service_property(_interface, signature="s",

2180

@dbus_service_property(_interface,

2181

signature="s",

1592

2182

access="readwrite")

1593

2183

def Checker_dbus_property(self, value=None):

1594

2184

if value is None: # get

1595

2185

return dbus.String(self.checker_command)

1596

self.checker_command = unicode(value)

1597

2186

self.checker_command = str(value)

2187

1598

2188

# CheckerRunning - property

1599

@dbus_service_property(_interface, signature="b",

2189

@dbus_service_property(_interface,

2190

signature="b",

1600

2191

access="readwrite")

1601

2192

def CheckerRunning_dbus_property(self, value=None):

1602

2193

if value is None: # get

1605

2196

self.start_checker()

1606

2197

else:

1607

2198

self.stop_checker()

1608

2199

1609

2200

# ObjectPath - property

2201

@dbus_annotations(

2202

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

2203

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

1610

2204

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

1611

2205

def ObjectPath_dbus_property(self):

1612

return self.dbus_object_path # is already a dbus.ObjectPath

1613

2206

return self.dbus_object_path # is already a dbus.ObjectPath

2207

1614

2208

# Secret = property

1615

@dbus_service_property(_interface, signature="ay",

1616

access="write", byte_arrays=True)

2209

@dbus_annotations(

2210

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

2211

"invalidates"})

2212

@dbus_service_property(_interface,

2213

signature="ay",

2214

access="write",

2215

byte_arrays=True)

1617

2216

def Secret_dbus_property(self, value):

1618

self.secret = str(value)

1619

2217

self.secret = bytes(value)

2218

1620

2219

del _interface

1621

2220

1622

2221

1623

2222

class ProxyClient(object):

1624

def __init__(self, child_pipe, fpr, address):

2223

def __init__(self, child_pipe, key_id, fpr, address):

1625

2224

self._pipe = child_pipe

1626

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

2225

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

1627

2226

if not self._pipe.recv():

1628

raise KeyError()

1629

2227

raise KeyError(key_id or fpr)

2228

1630

2229

def __getattribute__(self, name):

1631

2230

if name == '_pipe':

1632

2231

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

1635

2234

if data[0] == 'data':

1636

2235

return data[1]

1637

2236

if data[0] == 'function':

2237

1638

2238

def func(*args, **kwargs):

1639

2239

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

1640

2240

return self._pipe.recv()[1]

2241

1641

2242

return func

1642

2243

1643

2244

def __setattr__(self, name, value):

1644

2245

if name == '_pipe':

1645

2246

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

1648

2249

1649

2250

class ClientHandler(socketserver.BaseRequestHandler, object):

1650

2251

"""A class to handle client connections.

1651

2252

1652

2253

Instantiated once for each connection to handle it.

1653

2254

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

1654

2255

1655

2256

def handle(self):

1656

2257

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

1657

2258

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

1658

unicode(self.client_address))

2259

str(self.client_address))

1659

2260

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

1660

2261

self.server.child_pipe.fileno())

1661

1662

session = (gnutls.connection

1663

.ClientSession(self.request,

1664

gnutls.connection

1665

.X509Credentials()))

1666

1667

# Note: gnutls.connection.X509Credentials is really a

1668

# generic GnuTLS certificate credentials object so long as

1669

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

1670

# here despite using OpenPGP certificates.

1671

1672

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

1673

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

1674

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

1675

# "+DHE-DSS"))

2262

2263

session = gnutls.ClientSession(self.request)

2264

2265

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

2266

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

2267

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

2268

# "+DHE-DSS"))

1676

2269

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

1677

2270

priority = self.server.gnutls_priority

1678

2271

if priority is None:

1679

2272

priority = "NORMAL"

1680

(gnutls.library.functions

1681

.gnutls_priority_set_direct(session._c_object,

1682

priority, None))

1683

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2276

1684

2277

# Start communication using the Mandos protocol

1685

2278

# Get protocol number

1686

2279

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

1691

2284

except (ValueError, IndexError, RuntimeError) as error:

1692

2285

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

1693

2286

return

1694

2287

1695

2288

# Start GnuTLS connection

1696

2289

try:

1697

2290

session.handshake()

1698

except gnutls.errors.GNUTLSError as error:

2291

except gnutls.Error as error:

1699

2292

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

1700

2293

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

1701

2294

# established. Just abandon the request.

1702

2295

return

1703

2296

logger.debug("Handshake succeeded")

1704

2297

1705

2298

approval_required = False

1706

2299

try:

1707

try:

1708

fpr = self.fingerprint(self.peer_certificate

1709

(session))

1710

except (TypeError,

1711

gnutls.errors.GNUTLSError) as error:

1712

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

1713

return

1714

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

1715

1716

try:

1717

client = ProxyClient(child_pipe, fpr,

2300

if gnutls.has_rawpk:

2301

fpr = ""

2302

try:

2303

key_id = self.key_id(

2304

self.peer_certificate(session))

2305

except (TypeError, gnutls.Error) as error:

2306

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

2307

return

2308

logger.debug("Key ID: %s", key_id)

2309

2310

else:

2311

key_id = ""

2312

try:

2313

fpr = self.fingerprint(

2314

self.peer_certificate(session))

2315

except (TypeError, gnutls.Error) as error:

2316

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

2317

return

2318

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

2319

2320

try:

2321

client = ProxyClient(child_pipe, key_id, fpr,

1718

2322

self.client_address)

1719

2323

except KeyError:

1720

2324

return

1721

2325

1722

2326

if client.approval_delay:

1723

2327

delay = client.approval_delay

1724

2328

client.approvals_pending += 1

1725

2329

approval_required = True

1726

2330

1727

2331

while True:

1728

2332

if not client.enabled:

1729

2333

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

1730

client.name)

2334

client.name)

1731

2335

if self.server.use_dbus:

1732

2336

# Emit D-Bus signal

1733

2337

client.Rejected("Disabled")

1734

2338

return

1735

2339

1736

2340

if client.approved or not client.approval_delay:

1737

#We are approved or approval is disabled

2341

# We are approved or approval is disabled

1738

2342

break

1739

2343

elif client.approved is None:

1740

2344

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

1751

2355

# Emit D-Bus signal

1752

2356

client.Rejected("Denied")

1753

2357

return

1754

1755

#wait until timeout or approved

2358

2359

# wait until timeout or approved

1756

2360

time = datetime.datetime.now()

1757

2361

client.changedstate.acquire()

1758

2362

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

1771

2375

break

1772

2376

else:

1773

2377

delay -= time2 - time

1774

1775

sent_size = 0

1776

while sent_size < len(client.secret):

1777

try:

1778

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

1779

except gnutls.errors.GNUTLSError as error:

1780

logger.warning("gnutls send failed",

1781

exc_info=error)

1782

return

1783

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

1784

sent, len(client.secret)

1785

- (sent_size + sent))

1786

sent_size += sent

1787

2378

2379

try:

2380

session.send(client.secret)

2381

except gnutls.Error as error:

2382

logger.warning("gnutls send failed",

2383

exc_info=error)

2384

return

2385

1788

2386

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

1789

2387

# bump the timeout using extended_timeout

1790

2388

client.bump_timeout(client.extended_timeout)

1791

2389

if self.server.use_dbus:

1792

2390

# Emit D-Bus signal

1793

2391

client.GotSecret()

1794

2392

1795

2393

finally:

1796

2394

if approval_required:

1797

2395

client.approvals_pending -= 1

1798

2396

try:

1799

2397

session.bye()

1800

except gnutls.errors.GNUTLSError as error:

2398

except gnutls.Error as error:

1801

2399

logger.warning("GnuTLS bye failed",

1802

2400

exc_info=error)

1803

2401

1804

2402

@staticmethod

1805

2403

def peer_certificate(session):

1806

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

1807

# If not an OpenPGP certificate...

1808

if (gnutls.library.functions

1809

.gnutls_certificate_type_get(session._c_object)

1810

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1811

# ...do the normal thing

1812

return session.peer_certificate

2404

"Return the peer's certificate as a bytestring"

2405

try:

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2408

except AttributeError:

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2410

if gnutls.has_rawpk:

2411

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2412

else:

2413

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2414

# If not a valid certificate type...

2415

if cert_type not in valid_cert_types:

2416

logger.info("Cert type %r not in %r", cert_type,

2417

valid_cert_types)

2418

# ...return invalid data

2419

return b""

1813

2420

list_size = ctypes.c_uint(1)

1814

cert_list = (gnutls.library.functions

1815

.gnutls_certificate_get_peers

2421

cert_list = (gnutls.certificate_get_peers

1816

2422

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

1817

2423

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

1818

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

1819

" certificate")

2424

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

1820

2425

if list_size.value == 0:

1821

2426

return None

1822

2427

cert = cert_list[0]

1823

2428

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

1824

2429

2430

@staticmethod

2431

def key_id(certificate):

2432

"Convert a certificate bytestring to a hexdigit key ID"

2433

# New GnuTLS "datum" with the public key

2434

datum = gnutls.datum_t(

2435

ctypes.cast(ctypes.c_char_p(certificate),

2436

ctypes.POINTER(ctypes.c_ubyte)),

2437

ctypes.c_uint(len(certificate)))

2438

# XXX all these need to be created in the gnutls "module"

2439

# New empty GnuTLS certificate

2440

pubkey = gnutls.pubkey_t()

2441

gnutls.pubkey_init(ctypes.byref(pubkey))

2442

# Import the raw public key into the certificate

2443

gnutls.pubkey_import(pubkey,

2444

ctypes.byref(datum),

2445

gnutls.X509_FMT_DER)

2446

# New buffer for the key ID

2447

buf = ctypes.create_string_buffer(32)

2448

buf_len = ctypes.c_size_t(len(buf))

2449

# Get the key ID from the raw public key into the buffer

2450

gnutls.pubkey_get_key_id(pubkey,

2451

gnutls.KEYID_USE_SHA256,

2452

ctypes.cast(ctypes.byref(buf),

2453

ctypes.POINTER(ctypes.c_ubyte)),

2454

ctypes.byref(buf_len))

2455

# Deinit the certificate

2456

gnutls.pubkey_deinit(pubkey)

2457

2458

# Convert the buffer to a Python bytestring

2459

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

2460

# Convert the bytestring to hexadecimal notation

2461

hex_key_id = binascii.hexlify(key_id).upper()

2462

return hex_key_id

2463

1825

2464

@staticmethod

1826

2465

def fingerprint(openpgp):

1827

2466

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1828

2467

# New GnuTLS "datum" with the OpenPGP public key

1829

datum = (gnutls.library.types

1830

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

1831

ctypes.POINTER

1832

(ctypes.c_ubyte)),

1833

ctypes.c_uint(len(openpgp))))

2468

datum = gnutls.datum_t(

2469

ctypes.cast(ctypes.c_char_p(openpgp),

2470

ctypes.POINTER(ctypes.c_ubyte)),

2471

ctypes.c_uint(len(openpgp)))

1834

2472

# New empty GnuTLS certificate

1835

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1836

(gnutls.library.functions

1837

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2473

crt = gnutls.openpgp_crt_t()

2474

gnutls.openpgp_crt_init(ctypes.byref(crt))

1838

2475

# Import the OpenPGP public key into the certificate

1839

(gnutls.library.functions

1840

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

1841

gnutls.library.constants

1842

.GNUTLS_OPENPGP_FMT_RAW))

2476

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

2477

gnutls.OPENPGP_FMT_RAW)

1843

2478

# Verify the self signature in the key

1844

2479

crtverify = ctypes.c_uint()

1845

(gnutls.library.functions

1846

.gnutls_openpgp_crt_verify_self(crt, 0,

1847

ctypes.byref(crtverify)))

2480

gnutls.openpgp_crt_verify_self(crt, 0,

2481

ctypes.byref(crtverify))

1848

2482

if crtverify.value != 0:

1849

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1850

raise (gnutls.errors.CertificateSecurityError

1851

("Verify failed"))

2483

gnutls.openpgp_crt_deinit(crt)

2484

raise gnutls.CertificateSecurityError(code

2485

=crtverify.value)

1852

2486

# New buffer for the fingerprint

1853

2487

buf = ctypes.create_string_buffer(20)

1854

2488

buf_len = ctypes.c_size_t()

1855

2489

# Get the fingerprint from the certificate into the buffer

1856

(gnutls.library.functions

1857

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

1858

ctypes.byref(buf_len)))

2490

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

2491

ctypes.byref(buf_len))

1859

2492

# Deinit the certificate

1860

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2493

gnutls.openpgp_crt_deinit(crt)

1861

2494

# Convert the buffer to a Python bytestring

1862

2495

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

1863

2496

# Convert the bytestring to hexadecimal notation

1867

2500

1868

2501

class MultiprocessingMixIn(object):

1869

2502

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

2503

1870

2504

def sub_process_main(self, request, address):

1871

2505

try:

1872

2506

self.finish_request(request, address)

1873

2507

except Exception:

1874

2508

self.handle_error(request, address)

1875

2509

self.close_request(request)

1876

2510

1877

2511

def process_request(self, request, address):

1878

2512

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

1879

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

1880

args = (request, address))

2513

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

2514

args=(request, address))

1881

2515

proc.start()

1882

2516

return proc

1883

2517

1884

2518

1885

2519

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1886

2520

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

2521

1887

2522

def process_request(self, request, client_address):

1888

2523

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

1889

2524

1890

2525

This function creates a new pipe in self.pipe

1891

2526

"""

1892

2527

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1893

2528

1894

2529

proc = MultiprocessingMixIn.process_request(self, request,

1895

2530

client_address)

1896

2531

self.child_pipe.close()

1897

2532

self.add_pipe(parent_pipe, proc)

1898

2533

1899

2534

def add_pipe(self, parent_pipe, proc):

1900

2535

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

1901

2536

raise NotImplementedError()

1904

2539

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1905

2540

socketserver.TCPServer, object):

1906

2541

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

1907

2542

1908

2543

Attributes:

1909

2544

enabled: Boolean; whether this server is activated yet

1910

2545

interface: None or a network interface name (string)

1911

2546

use_ipv6: Boolean; to use IPv6 or not

1912

2547

"""

2548

1913

2549

def __init__(self, server_address, RequestHandlerClass,

1914

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

2550

interface=None,

2551

use_ipv6=True,

2552

socketfd=None):

1915

2553

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

1916

2554

creating a new one with socket.socket().

1917

2555

"""

1923

2561

self.socketfd = socketfd

1924

2562

# Save the original socket.socket() function

1925

2563

self.socket_socket = socket.socket

2564

1926

2565

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

1927

#

2566

#

1928

2567

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

1929

2568

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

1930

2569

# patching socket.socket.)

1931

#

2570

#

1932

2571

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

1933

2572

@functools.wraps(socket.socket)

1934

2573

def socket_wrapper(*args, **kwargs):

1946

2585

# socket_wrapper(), if socketfd was set.

1947

2586

socketserver.TCPServer.__init__(self, server_address,

1948

2587

RequestHandlerClass)

1949

2588

1950

2589

def server_bind(self):

1951

2590

"""This overrides the normal server_bind() function

1952

2591

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

1953

2592

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

2593

global SO_BINDTODEVICE

1954

2594

if self.interface is not None:

1955

2595

if SO_BINDTODEVICE is None:

1956

logger.error("SO_BINDTODEVICE does not exist;"

1957

" cannot bind to interface %s",

1958

self.interface)

1959

else:

1960

try:

1961

self.socket.setsockopt(socket.SOL_SOCKET,

1962

SO_BINDTODEVICE,

1963

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

1964

except socket.error as error:

1965

if error.errno == errno.EPERM:

1966

logger.error("No permission to bind to"

1967

" interface %s", self.interface)

1968

elif error.errno == errno.ENOPROTOOPT:

1969

logger.error("SO_BINDTODEVICE not available;"

1970

" cannot bind to interface %s",

1971

self.interface)

1972

elif error.errno == errno.ENODEV:

1973

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

1974

" cannot bind", self.interface)

1975

else:

1976

raise

2596

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

2597

# common enough.

2598

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

2599

SO_BINDTODEVICE = 25

2600

try:

2601

self.socket.setsockopt(

2602

socket.SOL_SOCKET, SO_BINDTODEVICE,

2603

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

2604

except socket.error as error:

2605

if error.errno == errno.EPERM:

2606

logger.error("No permission to bind to"

2607

" interface %s", self.interface)

2608

elif error.errno == errno.ENOPROTOOPT:

2609

logger.error("SO_BINDTODEVICE not available;"

2610

" cannot bind to interface %s",

2611

self.interface)

2612

elif error.errno == errno.ENODEV:

2613

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

2614

" cannot bind", self.interface)

2615

else:

2616

raise

1977

2617

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

1978

2618

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

1979

2619

if not self.server_address[0]:

1980

2620

if self.address_family == socket.AF_INET6:

1981

any_address = "::" # in6addr_any

2621

any_address = "::" # in6addr_any

1982

2622

else:

1983

any_address = "0.0.0.0" # INADDR_ANY

2623

any_address = "0.0.0.0" # INADDR_ANY

1984

2624

self.server_address = (any_address,

1985

2625

self.server_address[1])

1986

2626

elif not self.server_address[1]:

1987

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

1988

0)

2627

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

1989

2628

# if self.interface:

1990

2629

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

1991

2630

# 0, # port

1997

2636

1998

2637

class MandosServer(IPv6_TCPServer):

1999

2638

"""Mandos server.

2000

2639

2001

2640

Attributes:

2002

2641

clients: set of Client objects

2003

2642

gnutls_priority GnuTLS priority string

2004

2643

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

2005

2006

Assumes a gobject.MainLoop event loop.

2644

2645

Assumes a GLib.MainLoop event loop.

2007

2646

"""

2647

2008

2648

def __init__(self, server_address, RequestHandlerClass,

2009

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

2010

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

2649

interface=None,

2650

use_ipv6=True,

2651

clients=None,

2652

gnutls_priority=None,

2653

use_dbus=True,

2654

socketfd=None):

2011

2655

self.enabled = False

2012

2656

self.clients = clients

2013

2657

if self.clients is None:

2016

2660

self.gnutls_priority = gnutls_priority

2017

2661

IPv6_TCPServer.__init__(self, server_address,

2018

2662

RequestHandlerClass,

2019

interface = interface,

2020

use_ipv6 = use_ipv6,

2021

socketfd = socketfd)

2663

interface=interface,

2664

use_ipv6=use_ipv6,

2665

socketfd=socketfd)

2666

2022

2667

def server_activate(self):

2023

2668

if self.enabled:

2024

2669

return socketserver.TCPServer.server_activate(self)

2025

2670

2026

2671

def enable(self):

2027

2672

self.enabled = True

2028

2673

2029

2674

def add_pipe(self, parent_pipe, proc):

2030

2675

# Call "handle_ipc" for both data and EOF events

2031

gobject.io_add_watch(parent_pipe.fileno(),

2032

gobject.IO_IN | gobject.IO_HUP,

2033

functools.partial(self.handle_ipc,

2034

parent_pipe =

2035

parent_pipe,

2036

proc = proc))

2037

2038

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

2039

proc = None, client_object=None):

2676

GLib.io_add_watch(

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2679

functools.partial(self.handle_ipc,

2680

parent_pipe=parent_pipe,

2681

proc=proc))

2682

2683

def handle_ipc(self, source, condition,

2684

parent_pipe=None,

2685

proc=None,

2686

client_object=None):

2040

2687

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

2041

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

2688

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

2042

2689

# Wait for other process to exit

2043

2690

proc.join()

2044

2691

return False

2045

2692

2046

2693

# Read a request from the child

2047

2694

request = parent_pipe.recv()

2048

2695

command = request[0]

2049

2696

2050

2697

if command == 'init':

2051

fpr = request[1]

2052

address = request[2]

2053

2054

for c in self.clients.itervalues():

2055

if c.fingerprint == fpr:

2698

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

2699

fpr = request[2].decode("ascii")

2700

address = request[3]

2701

2702

for c in self.clients.values():

2703

if key_id and c.key_id == key_id:

2704

client = c

2705

break

2706

if fpr and c.fingerprint == fpr:

2056

2707

client = c

2057

2708

break

2058

2709

else:

2059

logger.info("Client not found for fingerprint: %s, ad"

2060

"dress: %s", fpr, address)

2710

logger.info("Client not found for key ID: %s, address"

2711

": %s", key_id or fpr, address)

2061

2712

if self.use_dbus:

2062

2713

# Emit D-Bus signal

2063

mandos_dbus_service.ClientNotFound(fpr,

2714

mandos_dbus_service.ClientNotFound(key_id or fpr,

2064

2715

address[0])

2065

2716

parent_pipe.send(False)

2066

2717

return False

2067

2068

gobject.io_add_watch(parent_pipe.fileno(),

2069

gobject.IO_IN | gobject.IO_HUP,

2070

functools.partial(self.handle_ipc,

2071

parent_pipe =

2072

parent_pipe,

2073

proc = proc,

2074

client_object =

2075

client))

2718

2719

GLib.io_add_watch(

2720

parent_pipe.fileno(),

2721

GLib.IO_IN | GLib.IO_HUP,

2722

functools.partial(self.handle_ipc,

2723

parent_pipe=parent_pipe,

2724

proc=proc,

2725

client_object=client))

2076

2726

parent_pipe.send(True)

2077

2727

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

2078

2728

# same fileno

2081

2731

funcname = request[1]

2082

2732

args = request[2]

2083

2733

kwargs = request[3]

2084

2734

2085

2735

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

2086

2736

funcname)(*args,

2087

**kwargs)))

2088

2737

**kwargs)))

2738

2089

2739

if command == 'getattr':

2090

2740

attrname = request[1]

2091

if callable(client_object.__getattribute__(attrname)):

2092

parent_pipe.send(('function',))

2741

if isinstance(client_object.__getattribute__(attrname),

2742

collections.Callable):

2743

parent_pipe.send(('function', ))

2093

2744

else:

2094

parent_pipe.send(('data', client_object

2095

.__getattribute__(attrname)))

2096

2745

parent_pipe.send((

2746

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

2747

2097

2748

if command == 'setattr':

2098

2749

attrname = request[1]

2099

2750

value = request[2]

2100

2751

setattr(client_object, attrname, value)

2101

2752

2102

2753

return True

2103

2754

2104

2755

2105

2756

def rfc3339_duration_to_delta(duration):

2106

2757

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

2107

2758

2108

2759

>>> rfc3339_duration_to_delta("P7D")

2109

2760

datetime.timedelta(7)

2110

2761

>>> rfc3339_duration_to_delta("PT60S")

2120

2771

>>> rfc3339_duration_to_delta("P1DT3M20S")

2121

2772

datetime.timedelta(1, 200)

2122

2773

"""

2123

2774

2124

2775

# Parsing an RFC 3339 duration with regular expressions is not

2125

2776

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

2126

2777

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

2127

2778

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

2128

2779

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

2129

2780

# avoid excessive use of external libraries.

2130

2781

2131

2782

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

2132

Token = collections.namedtuple("Token",

2133

("regexp", # To match token; if

2134

# "value" is not None,

2135

# must have a "group"

2136

# containing digits

2137

"value", # datetime.timedelta or

2138

# None

2139

"followers")) # Tokens valid after

2140

# this token

2783

Token = collections.namedtuple("Token", (

2784

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

2785

# a "group" containing digits

2786

"value", # datetime.timedelta or None

2787

"followers")) # Tokens valid after this token

2141

2788

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

2142

2789

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

2143

2790

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

2144

2791

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

2145

2792

datetime.timedelta(seconds=1),

2146

frozenset((token_end,)))

2793

frozenset((token_end, )))

2147

2794

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

2148

2795

datetime.timedelta(minutes=1),

2149

2796

frozenset((token_second, token_end)))

2165

2812

frozenset((token_month, token_end)))

2166

2813

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

2167

2814

datetime.timedelta(weeks=1),

2168

frozenset((token_end,)))

2815

frozenset((token_end, )))

2169

2816

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

2170

2817

frozenset((token_year, token_month,

2171

2818

token_day, token_time,

2172

2819

token_week)))

2173

# Define starting values

2174

value = datetime.timedelta() # Value so far

2820

# Define starting values:

2821

# Value so far

2822

value = datetime.timedelta()

2175

2823

found_token = None

2176

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

2177

s = duration # String left to parse

2824

# Following valid tokens

2825

followers = frozenset((token_duration, ))

2826

# String left to parse

2827

s = duration

2178

2828

# Loop until end token is found

2179

2829

while found_token is not token_end:

2180

2830

# Search for any currently valid tokens

2196

2846

break

2197

2847

else:

2198

2848

# No currently valid tokens were found

2199

raise ValueError("Invalid RFC 3339 duration")

2849

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

2850

.format(duration))

2200

2851

# End token found

2201

2852

return value

2202

2853

2203

2854

2204

2855

def string_to_delta(interval):

2205

2856

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

2206

2857

2207

2858

>>> string_to_delta('7d')

2208

2859

datetime.timedelta(7)

2209

2860

>>> string_to_delta('60s')

2217

2868

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

2218

2869

datetime.timedelta(0, 330)

2219

2870

"""

2220

2871

2221

2872

try:

2222

2873

return rfc3339_duration_to_delta(interval)

2223

2874

except ValueError:

2224

2875

pass

2225

2876

2226

2877

timevalue = datetime.timedelta(0)

2227

2878

for s in interval.split():

2228

2879

try:

2229

suffix = unicode(s[-1])

2880

suffix = s[-1]

2230

2881

value = int(s[:-1])

2231

2882

if suffix == "d":

2232

2883

delta = datetime.timedelta(value)

2239

2890

elif suffix == "w":

2240

2891

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

2241

2892

else:

2242

raise ValueError("Unknown suffix {!r}"

2243

.format(suffix))

2893

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

2244

2894

except IndexError as e:

2245

2895

raise ValueError(*(e.args))

2246

2896

timevalue += delta

2247

2897

return timevalue

2248

2898

2249

2899

2250

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

2900

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

2251

2901

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

2252

2902

2253

2903

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

2254

2904

if os.fork():

2255

2905

sys.exit()

2262

2912

# Close all standard open file descriptors

2263

2913

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

2264

2914

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

2265

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

2915

raise OSError(errno.ENODEV,

2916

"{} not a character device"

2266

2917

.format(os.devnull))

2267

2918

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

2268

2919

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

2272

2923

2273

2924

2274

2925

def main():

2275

2926

2276

2927

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

2277

2928

# Parsing of options, both command line and config file

2278

2929

2279

2930

parser = argparse.ArgumentParser()

2280

2931

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

2281

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

2932

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

2282

2933

help="show version number and exit")

2283

2934

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

2284

2935

help="Bind to interface IF")

2320

2971

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

2321

2972

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

2322

2973

default=None)

2323

2974

2324

2975

options = parser.parse_args()

2325

2976

2326

2977

if options.check:

2327

2978

import doctest

2328

2979

fail_count, test_count = doctest.testmod()

2329

2980

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

2330

2981

2331

2982

# Default values for config file for server-global settings

2332

server_defaults = { "interface": "",

2333

"address": "",

2334

"port": "",

2335

"debug": "False",

2336

"priority":

2337

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

2338

"servicename": "Mandos",

2339

"use_dbus": "True",

2340

"use_ipv6": "True",

2341

"debuglevel": "",

2342

"restore": "True",

2343

"socket": "",

2344

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

2345

"foreground": "False",

2346

"zeroconf": "True",

2347

}

2348

2983

if gnutls.has_rawpk:

2984

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

2985

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2986

else:

2987

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

2988

":+SIGN-DSA-SHA256")

2989

server_defaults = {"interface": "",

2990

"address": "",

2991

"port": "",

2992

"debug": "False",

2993

"priority": priority,

2994

"servicename": "Mandos",

2995

"use_dbus": "True",

2996

"use_ipv6": "True",

2997

"debuglevel": "",

2998

"restore": "True",

2999

"socket": "",

3000

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

3001

"foreground": "False",

3002

"zeroconf": "True",

3003

}

3004

del priority

3005

2349

3006

# Parse config file for server-global settings

2350

3007

server_config = configparser.SafeConfigParser(server_defaults)

2351

3008

del server_defaults

2352

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

2353

"mandos.conf"))

3009

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

2354

3010

# Convert the SafeConfigParser object to a dict

2355

3011

server_settings = server_config.defaults()

2356

3012

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

2357

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

3013

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

3014

"foreground", "zeroconf"):

2358

3015

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

2359

3016

option)

2360

3017

if server_settings["port"]:

2370

3027

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

2371

3028

["socket"])

2372

3029

del server_config

2373

3030

2374

3031

# Override the settings from the config file with command line

2375

3032

# options, if set.

2376

3033

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

2377

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

2378

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

2379

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

3034

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

3035

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

3036

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

2380

3037

value = getattr(options, option)

2381

3038

if value is not None:

2382

3039

server_settings[option] = value

2383

3040

del options

2384

3041

# Force all strings to be unicode

2385

3042

for option in server_settings.keys():

2386

if type(server_settings[option]) is str:

2387

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

3043

if isinstance(server_settings[option], bytes):

3044

server_settings[option] = (server_settings[option]

3045

.decode("utf-8"))

2388

3046

# Force all boolean options to be boolean

2389

3047

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

2390

3048

"foreground", "zeroconf"):

2393

3051

if server_settings["debug"]:

2394

3052

server_settings["foreground"] = True

2395

3053

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

2396

3054

2397

3055

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

2398

2399

if (not server_settings["zeroconf"] and

2400

not (server_settings["port"]

2401

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

2402

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

2403

" Zeroconf")

2404

3056

3057

if (not server_settings["zeroconf"]

3058

and not (server_settings["port"]

3059

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

3060

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

3061

2405

3062

# For convenience

2406

3063

debug = server_settings["debug"]

2407

3064

debuglevel = server_settings["debuglevel"]

2411

3068

stored_state_file)

2412

3069

foreground = server_settings["foreground"]

2413

3070

zeroconf = server_settings["zeroconf"]

2414

3071

2415

3072

if debug:

2416

3073

initlogger(debug, logging.DEBUG)

2417

3074

else:

2420

3077

else:

2421

3078

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

2422

3079

initlogger(debug, level)

2423

3080

2424

3081

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

2425

syslogger.setFormatter(logging.Formatter

2426

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

2427

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

2428

.format(server_settings

2429

["servicename"])))

2430

3082

syslogger.setFormatter(

3083

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

3084

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

3085

server_settings["servicename"])))

3086

2431

3087

# Parse config file with clients

2432

3088

client_config = configparser.SafeConfigParser(Client

2433

3089

.client_defaults)

2434

3090

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

2435

3091

"clients.conf"))

2436

3092

2437

3093

global mandos_dbus_service

2438

3094

mandos_dbus_service = None

2439

3095

2440

3096

socketfd = None

2441

3097

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

2442

3098

socketfd = server_settings["socket"]

2443

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

2444

server_settings["port"]),

2445

ClientHandler,

2446

interface=(server_settings["interface"]

2447

or None),

2448

use_ipv6=use_ipv6,

2449

gnutls_priority=

2450

server_settings["priority"],

2451

use_dbus=use_dbus,

2452

socketfd=socketfd)

3099

tcp_server = MandosServer(

3100

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

3101

ClientHandler,

3102

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

3103

use_ipv6=use_ipv6,

3104

gnutls_priority=server_settings["priority"],

3105

use_dbus=use_dbus,

3106

socketfd=socketfd)

2453

3107

if not foreground:

2454

3108

pidfilename = "/run/mandos.pid"

2455

3109

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

2456

3110

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

2457

3111

pidfile = None

2458

3112

try:

2459

pidfile = open(pidfilename, "w")

3113

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

2460

3114

except IOError as e:

2461

3115

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

2462

3116

exc_info=e)

2463

2464

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

3117

3118

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

3119

("mandos", "mandos"),

3120

("nobody", "nogroup")):

2465

3121

try:

2466

3122

uid = pwd.getpwnam(name).pw_uid

2467

gid = pwd.getpwnam(name).pw_gid

3123

gid = pwd.getpwnam(group).pw_gid

2468

3124

break

2469

3125

except KeyError:

2470

3126

continue

2474

3130

try:

2475

3131

os.setgid(gid)

2476

3132

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

2477

3136

except OSError as error:

3137

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

3138

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

2478

3139

if error.errno != errno.EPERM:

2479

3140

raise

2480

3141

2481

3142

if debug:

2482

3143

# Enable all possible GnuTLS debugging

2483

3144

2484

3145

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

2485

3146

# - GnuTLS manual

2486

gnutls.library.functions.gnutls_global_set_log_level(11)

2487

2488

@gnutls.library.types.gnutls_log_func

3147

gnutls.global_set_log_level(11)

3148

3149

@gnutls.log_func

2489

3150

def debug_gnutls(level, string):

2490

3151

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

2491

2492

(gnutls.library.functions

2493

.gnutls_global_set_log_function(debug_gnutls))

2494

3152

3153

gnutls.global_set_log_function(debug_gnutls)

3154

2495

3155

# Redirect stdin so all checkers get /dev/null

2496

3156

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

2497

3157

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

2498

3158

if null > 2:

2499

3159

os.close(null)

2500

3160

2501

3161

# Need to fork before connecting to D-Bus

2502

3162

if not foreground:

2503

3163

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

2504

3164

daemon()

2505

2506

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

2507

# need to inform gobject that threads will be used.

2508

gobject.threads_init()

2509

3165

3166

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

3167

# to inform GLib that threads will be used.

3168

GLib.threads_init()

3169

2510

3170

global main_loop

2511

3171

# From the Avahi example code

2512

3172

DBusGMainLoop(set_as_default=True)

2513

main_loop = gobject.MainLoop()

3173

main_loop = GLib.MainLoop()

2514

3174

bus = dbus.SystemBus()

2515

3175

# End of Avahi example code

2516

3176

if use_dbus:

2517

3177

try:

2518

3178

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

2519

bus, do_not_queue=True)

2520

old_bus_name = (dbus.service.BusName

2521

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

2522

do_not_queue=True))

2523

except dbus.exceptions.NameExistsException as e:

3179

bus,

3180

do_not_queue=True)

3181

old_bus_name = dbus.service.BusName(

3182

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

3183

do_not_queue=True)

3184

except dbus.exceptions.DBusException as e:

2524

3185

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

2525

3186

use_dbus = False

2526

3187

server_settings["use_dbus"] = False

2527

3188

tcp_server.use_dbus = False

2528

3189

if zeroconf:

2529

3190

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2530

service = AvahiServiceToSyslog(name =

2531

server_settings["servicename"],

2532

servicetype = "_mandos._tcp",

2533

protocol = protocol, bus = bus)

3191

service = AvahiServiceToSyslog(

3192

name=server_settings["servicename"],

3193

servicetype="_mandos._tcp",

3194

protocol=protocol,

3195

bus=bus)

2534

3196

if server_settings["interface"]:

2535

service.interface = (if_nametoindex

2536

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

2537

3197

service.interface = if_nametoindex(

3198

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

3199

2538

3200

global multiprocessing_manager

2539

3201

multiprocessing_manager = multiprocessing.Manager()

2540

3202

2541

3203

client_class = Client

2542

3204

if use_dbus:

2543

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

2544

3205

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

3206

2545

3207

client_settings = Client.config_parser(client_config)

2546

3208

old_client_settings = {}

2547

3209

clients_data = {}

2548

3210

2549

3211

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

2550

3212

global wnull

2551

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

3213

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

2552

3214

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

2553

3215

# mode

2554

3216

if debug or not foreground:

2555

3217

wnull.close()

2556

3218

2557

3219

# Get client data and settings from last running state.

2558

3220

if server_settings["restore"]:

2559

3221

try:

2560

3222

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

2561

clients_data, old_client_settings = (pickle.load

2562

(stored_state))

3223

if sys.version_info.major == 2:

3224

clients_data, old_client_settings = pickle.load(

3225

stored_state)

3226

else:

3227

bytes_clients_data, bytes_old_client_settings = (

3228

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

3229

# Fix bytes to strings

3230

# clients_data

3231

# .keys()

3232

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

3233

if isinstance(key, bytes)

3234

else key): value

3235

for key, value in

3236

bytes_clients_data.items()}

3237

del bytes_clients_data

3238

for key in clients_data:

3239

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

3240

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

3241

for k, v in

3242

clients_data[key].items()}

3243

clients_data[key] = value

3244

# .client_structure

3245

value["client_structure"] = [

3246

(s.decode("utf-8")

3247

if isinstance(s, bytes)

3248

else s) for s in

3249

value["client_structure"]]

3250

# .name & .host

3251

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

3252

if isinstance(value[k], bytes):

3253

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

3254

if not value.has_key("key_id"):

3255

value["key_id"] = ""

3256

elif not value.has_key("fingerprint"):

3257

value["fingerprint"] = ""

3258

# old_client_settings

3259

# .keys()

3260

old_client_settings = {

3261

(key.decode("utf-8")

3262

if isinstance(key, bytes)

3263

else key): value

3264

for key, value in

3265

bytes_old_client_settings.items()}

3266

del bytes_old_client_settings

3267

# .host

3268

for value in old_client_settings.values():

3269

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

3270

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

3271

.decode("utf-8"))

2563

3272

os.remove(stored_state_path)

2564

3273

except IOError as e:

2565

3274

if e.errno == errno.ENOENT:

2566

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

2567

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

3275

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

3276

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

2568

3277

else:

2569

3278

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

2570

3279

exc_info=e)

2571

3280

raise

2572

3281

except EOFError as e:

2573

3282

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

2574

"EOFError:", exc_info=e)

2575

3283

"EOFError:",

3284

exc_info=e)

3285

2576

3286

with PGPEngine() as pgp:

2577

3287

for client_name, client in clients_data.items():

2578

3288

# Skip removed clients

2579

3289

if client_name not in client_settings:

2580

3290

continue

2581

3291

2582

3292

# Decide which value to use after restoring saved state.

2583

3293

# We have three different values: Old config file,

2584

3294

# new config file, and saved state.

2589

3299

# For each value in new config, check if it

2590

3300

# differs from the old config value (Except for

2591

3301

# the "secret" attribute)

2592

if (name != "secret" and

2593

value != old_client_settings[client_name]

2594

[name]):

3302

if (name != "secret"

3303

and (value !=

3304

old_client_settings[client_name][name])):

2595

3305

client[name] = value

2596

3306

except KeyError:

2597

3307

pass

2598

3308

2599

3309

# Clients who has passed its expire date can still be

2600

# enabled if its last checker was successful. Clients

3310

# enabled if its last checker was successful. A Client

2601

3311

# whose checker succeeded before we stored its state is

2602

3312

# assumed to have successfully run all checkers during

2603

3313

# downtime.

2606

3316

if not client["last_checked_ok"]:

2607

3317

logger.warning(

2608

3318

"disabling client {} - Client never "

2609

"performed a successful checker"

2610

.format(client_name))

3319

"performed a successful checker".format(

3320

client_name))

2611

3321

client["enabled"] = False

2612

3322

elif client["last_checker_status"] != 0:

2613

3323

logger.warning(

2614

3324

"disabling client {} - Client last"

2615

" checker failed with error code {}"

2616

.format(client_name,

2617

client["last_checker_status"]))

3325

" checker failed with error code"

3326

" {}".format(

3327

client_name,

3328

client["last_checker_status"]))

2618

3329

client["enabled"] = False

2619

3330

else:

2620

client["expires"] = (datetime.datetime

2621

.utcnow()

2622

+ client["timeout"])

3331

client["expires"] = (

3332

datetime.datetime.utcnow()

3333

+ client["timeout"])

2623

3334

logger.debug("Last checker succeeded,"

2624

" keeping {} enabled"

2625

.format(client_name))

3335

" keeping {} enabled".format(

3336

client_name))

2626

3337

try:

2627

client["secret"] = (

2628

pgp.decrypt(client["encrypted_secret"],

2629

client_settings[client_name]

2630

["secret"]))

3338

client["secret"] = pgp.decrypt(

3339

client["encrypted_secret"],

3340

client_settings[client_name]["secret"])

2631

3341

except PGPError:

2632

3342

# If decryption fails, we use secret from new settings

2633

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

2634

.format(client_name))

2635

client["secret"] = (

2636

client_settings[client_name]["secret"])

2637

3343

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

3344

client_name))

3345

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

3346

["secret"])

3347

2638

3348

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

2639

3349

for client_name in (set(old_client_settings)

2640

3350

- set(client_settings)):

2642

3352

for client_name in (set(client_settings)

2643

3353

- set(old_client_settings)):

2644

3354

clients_data[client_name] = client_settings[client_name]

2645

3355

2646

3356

# Create all client objects

2647

3357

for client_name, client in clients_data.items():

2648

3358

tcp_server.clients[client_name] = client_class(

2649

name = client_name, settings = client,

2650

server_settings = server_settings)

2651

3359

name=client_name,

3360

settings=client,

3361

server_settings=server_settings)

3362

2652

3363

if not tcp_server.clients:

2653

3364

logger.warning("No clients defined")

2654

3365

2655

3366

if not foreground:

2656

3367

if pidfile is not None:

3368

pid = os.getpid()

2657

3369

try:

2658

3370

with pidfile:

2659

pid = os.getpid()

2660

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

3371

print(pid, file=pidfile)

2661

3372

except IOError:

2662

3373

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

2663

3374

pidfilename, pid)

2664

3375

del pidfile

2665

3376

del pidfilename

2666

2667

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

2668

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

2669

3377

3378

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

3379

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3380

lambda: main_loop.quit() and False)

3381

2670

3382

if use_dbus:

2671

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

2672

"se.bsnet.fukt.Mandos"})

2673

class MandosDBusService(DBusObjectWithProperties):

3383

3384

@alternate_dbus_interfaces(

3385

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

3386

class MandosDBusService(DBusObjectWithObjectManager):

2674

3387

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

3388

2675

3389

def __init__(self):

2676

3390

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

3391

2677

3392

_interface = "se.recompile.Mandos"

2678

2679

@dbus_interface_annotations(_interface)

2680

def _foo(self):

2681

return { "org.freedesktop.DBus.Property"

2682

".EmitsChangedSignal":

2683

"false"}

2684

3393

2685

3394

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

2686

3395

def ClientAdded(self, objpath):

2687

3396

"D-Bus signal"

2688

3397

pass

2689

3398

2690

3399

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

2691

def ClientNotFound(self, fingerprint, address):

3400

def ClientNotFound(self, key_id, address):

2692

3401

"D-Bus signal"

2693

3402

pass

2694

3403

3404

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

3405

"true"})

2695

3406

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

2696

3407

def ClientRemoved(self, objpath, name):

2697

3408

"D-Bus signal"

2698

3409

pass

2699

3410

3411

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

3412

"true"})

2700

3413

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

2701

3414

def GetAllClients(self):

2702

3415

"D-Bus method"

2703

return dbus.Array(c.dbus_object_path

2704

for c in

2705

tcp_server.clients.itervalues())

2706

3416

return dbus.Array(c.dbus_object_path for c in

3417

tcp_server.clients.values())

3418

3419

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

3420

"true"})

2707

3421

@dbus.service.method(_interface,

2708

3422

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

2709

3423

def GetAllClientsWithProperties(self):

2710

3424

"D-Bus method"

2711

3425

return dbus.Dictionary(

2712

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

2713

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

3426

{c.dbus_object_path: c.GetAll(

3427

"se.recompile.Mandos.Client")

3428

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

2714

3429

signature="oa{sv}")

2715

3430

2716

3431

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

2717

3432

def RemoveClient(self, object_path):

2718

3433

"D-Bus method"

2719

for c in tcp_server.clients.itervalues():

3434

for c in tcp_server.clients.values():

2720

3435

if c.dbus_object_path == object_path:

2721

3436

del tcp_server.clients[c.name]

2722

3437

c.remove_from_connection()

2723

# Don't signal anything except ClientRemoved

3438

# Don't signal the disabling

2724

3439

c.disable(quiet=True)

2725

# Emit D-Bus signal

2726

self.ClientRemoved(object_path, c.name)

3440

# Emit D-Bus signal for removal

3441

self.client_removed_signal(c)

2727

3442

return

2728

3443

raise KeyError(object_path)

2729

3444

2730

3445

del _interface

2731

3446

3447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3448

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

3449

def GetManagedObjects(self):

3450

"""D-Bus method"""

3451

return dbus.Dictionary(

3452

{client.dbus_object_path:

3453

dbus.Dictionary(

3454

{interface: client.GetAll(interface)

3455

for interface in

3456

client._get_all_interface_names()})

3457

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

3458

3459

def client_added_signal(self, client):

3460

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

3461

if use_dbus:

3462

# New standard signal

3463

self.InterfacesAdded(

3464

client.dbus_object_path,

3465

dbus.Dictionary(

3466

{interface: client.GetAll(interface)

3467

for interface in

3468

client._get_all_interface_names()}))

3469

# Old signal

3470

self.ClientAdded(client.dbus_object_path)

3471

3472

def client_removed_signal(self, client):

3473

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

3474

if use_dbus:

3475

# New standard signal

3476

self.InterfacesRemoved(

3477

client.dbus_object_path,

3478

client._get_all_interface_names())

3479

# Old signal

3480

self.ClientRemoved(client.dbus_object_path,

3481

client.name)

3482

2732

3483

mandos_dbus_service = MandosDBusService()

2733

3484

3485

# Save modules to variables to exempt the modules from being

3486

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

3487

mp = multiprocessing

3488

wn = wnull

3489

2734

3490

def cleanup():

2735

3491

"Cleanup function; run on exit"

2736

3492

if zeroconf:

2737

3493

service.cleanup()

2738

2739

multiprocessing.active_children()

2740

wnull.close()

3494

3495

mp.active_children()

3496

wn.close()

2741

3497

if not (tcp_server.clients or client_settings):

2742

3498

return

2743

3499

2744

3500

# Store client before exiting. Secrets are encrypted with key

2745

3501

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

2746

3502

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

2747

3503

clients = {}

2748

3504

with PGPEngine() as pgp:

2749

for client in tcp_server.clients.itervalues():

3505

for client in tcp_server.clients.values():

2750

3506

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

2751

3507

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

2752

3508

key)

2753

3509

client_dict = {}

2754

3510

2755

3511

# A list of attributes that can not be pickled

2756

3512

# + secret.

2757

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

2758

"checker", "server_settings" }

2759

for name, typ in (inspect.getmembers

2760

(dbus.service.Object)):

3513

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

3514

"checker", "server_settings"}

3515

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

3516

.Object):

2761

3517

exclude.add(name)

2762

3518

2763

3519

client_dict["encrypted_secret"] = (client

2764

3520

.encrypted_secret)

2765

3521

for attr in client.client_structure:

2766

3522

if attr not in exclude:

2767

3523

client_dict[attr] = getattr(client, attr)

2768

3524

2769

3525

clients[client.name] = client_dict

2770

3526

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

2771

3527

2772

3528

try:

2773

with (tempfile.NamedTemporaryFile

2774

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

2775

dir=os.path.dirname(stored_state_path),

2776

delete=False)) as stored_state:

2777

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

2778

tempname=stored_state.name

3529

with tempfile.NamedTemporaryFile(

3530

mode='wb',

3531

suffix=".pickle",

3532

prefix='clients-',

3533

dir=os.path.dirname(stored_state_path),

3534

delete=False) as stored_state:

3535

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

3536

protocol=2)

3537

tempname = stored_state.name

2779

3538

os.rename(tempname, stored_state_path)

2780

3539

except (IOError, OSError) as e:

2781

3540

if not debug:

2790

3549

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

2791

3550

exc_info=e)

2792

3551

raise

2793

3552

2794

3553

# Delete all clients, and settings from config

2795

3554

while tcp_server.clients:

2796

3555

name, client = tcp_server.clients.popitem()

2797

3556

if use_dbus:

2798

3557

client.remove_from_connection()

2799

# Don't signal anything except ClientRemoved

3558

# Don't signal the disabling

2800

3559

client.disable(quiet=True)

3560

# Emit D-Bus signal for removal

2801

3561

if use_dbus:

2802

# Emit D-Bus signal

2803

mandos_dbus_service.ClientRemoved(client

2804

.dbus_object_path,

2805

client.name)

3562

mandos_dbus_service.client_removed_signal(client)

2806

3563

client_settings.clear()

2807

3564

2808

3565

atexit.register(cleanup)

2809

2810

for client in tcp_server.clients.itervalues():

3566

3567

for client in tcp_server.clients.values():

2811

3568

if use_dbus:

2812

# Emit D-Bus signal

2813

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3569

# Emit D-Bus signal for adding

3570

mandos_dbus_service.client_added_signal(client)

2814

3571

# Need to initiate checking of clients

2815

3572

if client.enabled:

2816

3573

client.init_checker()

2817

3574

2818

3575

tcp_server.enable()

2819

3576

tcp_server.server_activate()

2820

3577

2821

3578

# Find out what port we got

2822

3579

if zeroconf:

2823

3580

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

2828

3585

else: # IPv4

2829

3586

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

2830

3587

*tcp_server.socket.getsockname())

2831

2832

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

2833

3588

3589

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

3590

2834

3591

try:

2835

3592

if zeroconf:

2836

3593

# From the Avahi example code

2841

3598

cleanup()

2842

3599

sys.exit(1)

2843

3600

# End of Avahi example code

2844

2845

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

2846

lambda *args, **kwargs:

2847

(tcp_server.handle_request

2848

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

2849

3601

3602

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

3603

lambda *args, **kwargs:

3604

(tcp_server.handle_request

3605

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

3606

2850

3607

logger.debug("Starting main loop")

2851

3608

main_loop.run()

2852

3609

except AvahiError as error:

2861

3618

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

2862

3619

cleanup()

2863

3620

3621

2864

3622

if __name__ == '__main__':

2865

3623

main()