/mandos/trunk : revision 633

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.4"

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SO_BINDTODEVICE = None

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version = "1.6.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown=False):

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class avahi(object):

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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@staticmethod

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def string_array_to_txt_array(t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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302

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class AvahiError(Exception):

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

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223

self.value = value

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

307

**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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Attributes:

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

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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

257

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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279

" after %i retries, exiting.",

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280

self.rename_count)

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raise AvahiServiceError("Too many renames")

372

self.name = str(

373

self.server.GetAlternativeServiceName(self.name))

374

self.rename_count += 1

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

375

284

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

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285

self.name)

377

if remove:

378

self.remove()

286

self.remove()

379

287

try:

380

288

self.add()

381

289

except dbus.exceptions.DBusException as error:

382

if (error.get_dbus_name()

383

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

384

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

385

return self.rename(remove=False)

386

else:

387

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

388

self.cleanup()

389

os._exit(1)

390

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

391

295

def remove(self):

392

296

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

393

297

if self.entry_group_state_changed_match is not None:

395

299

self.entry_group_state_changed_match = None

396

300

if self.group is not None:

397

301

self.group.Reset()

398

302

399

303

def add(self):

400

304

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

401

305

self.remove()

418

322

dbus.UInt16(self.port),

419

323

avahi.string_array_to_txt_array(self.TXT))

420

324

self.group.Commit()

421

325

422

326

def entry_group_state_changed(self, state, error):

423

327

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

424

328

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

425

329

426

330

if state == avahi.ENTRY_GROUP_ESTABLISHED:

427

331

logger.debug("Zeroconf service established.")

428

332

elif state == avahi.ENTRY_GROUP_COLLISION:

430

334

self.rename()

431

335

elif state == avahi.ENTRY_GROUP_FAILURE:

432

336

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

433

str(error))

434

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

435

337

unicode(error))

338

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

339

.format(error))

340

436

341

def cleanup(self):

437

342

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

438

343

if self.group is not None:

443

348

pass

444

349

self.group = None

445

350

self.remove()

446

351

447

352

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

448

353

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

449

354

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

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

456

362

if state in bad_states:

457

363

if bad_states[state] is not None:

458

364

if error is None:

461

367

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

462

368

self.cleanup()

463

369

elif state == avahi.SERVER_RUNNING:

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

370

self.add()

476

371

else:

477

372

if error is None:

478

373

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

479

374

else:

480

375

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

481

376

482

377

def activate(self):

483

378

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

484

379

if self.server is None:

488

383

follow_name_owner_changes=True),

489

384

avahi.DBUS_INTERFACE_SERVER)

490

385

self.server.connect_to_signal("StateChanged",

491

self.server_state_changed)

386

self.server_state_changed)

492

387

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

493

388

494

389

495

390

class AvahiServiceToSyslog(AvahiService):

496

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

391

def rename(self):

497

392

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

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

502

398

return ret

503

399

504

400

505

# Pretend that we have a GnuTLS module

506

class gnutls(object):

507

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

508

509

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

510

if library is None:

511

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

512

_library = ctypes.cdll.LoadLibrary(library)

513

del library

514

515

# Unless otherwise indicated, the constants and types below are

516

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

517

518

# Constants

519

E_SUCCESS = 0

520

E_INTERRUPTED = -52

521

E_AGAIN = -28

522

CRT_OPENPGP = 2

523

CRT_RAWPK = 3

524

CLIENT = 2

525

SHUT_RDWR = 0

526

CRD_CERTIFICATE = 1

527

E_NO_CERTIFICATE_FOUND = -49

528

X509_FMT_DER = 0

529

NO_TICKETS = 1<<10

530

ENABLE_RAWPK = 1<<18

531

CTYPE_PEERS = 3

532

KEYID_USE_SHA256 = 1 # gnutls/x509.h

533

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

534

535

# Types

536

class session_int(ctypes.Structure):

537

_fields_ = []

538

session_t = ctypes.POINTER(session_int)

539

540

class certificate_credentials_st(ctypes.Structure):

541

_fields_ = []

542

certificate_credentials_t = ctypes.POINTER(

543

certificate_credentials_st)

544

certificate_type_t = ctypes.c_int

545

546

class datum_t(ctypes.Structure):

547

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

548

('size', ctypes.c_uint)]

549

550

class openpgp_crt_int(ctypes.Structure):

551

_fields_ = []

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

553

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

554

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

555

credentials_type_t = ctypes.c_int

556

transport_ptr_t = ctypes.c_void_p

557

close_request_t = ctypes.c_int

558

559

# Exceptions

560

class Error(Exception):

561

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

562

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

563

# code is passed, convert it to a string with

564

# gnutls.strerror()

565

self.code = code

566

if message is None and code is not None:

567

message = gnutls.strerror(code)

568

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

569

message, *args)

570

571

class CertificateSecurityError(Error):

572

pass

573

574

# Classes

575

class Credentials(object):

576

def __init__(self):

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

580

self.type = gnutls.CRD_CERTIFICATE

581

582

def __del__(self):

583

gnutls.certificate_free_credentials(self._c_object)

584

585

class ClientSession(object):

586

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

587

self._c_object = gnutls.session_t()

588

gnutls_flags = gnutls.CLIENT

589

if gnutls.check_version("3.5.6"):

590

gnutls_flags |= gnutls.NO_TICKETS

591

if gnutls.has_rawpk:

592

gnutls_flags |= gnutls.ENABLE_RAWPK

593

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

594

del gnutls_flags

595

gnutls.set_default_priority(self._c_object)

596

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

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

599

self.socket = socket

600

if credentials is None:

601

credentials = gnutls.Credentials()

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

605

self.credentials = credentials

606

607

def __del__(self):

608

gnutls.deinit(self._c_object)

609

610

def handshake(self):

611

return gnutls.handshake(self._c_object)

612

613

def send(self, data):

614

data = bytes(data)

615

data_len = len(data)

616

while data_len > 0:

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

619

data_len)

620

621

def bye(self):

622

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

623

624

# Error handling functions

625

def _error_code(result):

626

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

627

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

628

if result >= 0:

629

return result

630

if result == gnutls.E_NO_CERTIFICATE_FOUND:

631

raise gnutls.CertificateSecurityError(code=result)

632

raise gnutls.Error(code=result)

633

634

def _retry_on_error(result, func, arguments):

635

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

636

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

637

while result < 0:

638

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

639

return _error_code(result)

640

result = func(*arguments)

641

return result

642

643

# Unless otherwise indicated, the function declarations below are

644

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

645

646

# Functions

647

priority_set_direct = _library.gnutls_priority_set_direct

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

649

ctypes.POINTER(ctypes.c_char_p)]

650

priority_set_direct.restype = _error_code

651

652

init = _library.gnutls_init

653

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

654

init.restype = _error_code

655

656

set_default_priority = _library.gnutls_set_default_priority

657

set_default_priority.argtypes = [session_t]

658

set_default_priority.restype = _error_code

659

660

record_send = _library.gnutls_record_send

661

record_send.argtypes = [session_t, ctypes.c_void_p,

662

ctypes.c_size_t]

663

record_send.restype = ctypes.c_ssize_t

664

record_send.errcheck = _retry_on_error

665

666

certificate_allocate_credentials = (

667

_library.gnutls_certificate_allocate_credentials)

668

certificate_allocate_credentials.argtypes = [

669

ctypes.POINTER(certificate_credentials_t)]

670

certificate_allocate_credentials.restype = _error_code

671

672

certificate_free_credentials = (

673

_library.gnutls_certificate_free_credentials)

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

676

certificate_free_credentials.restype = None

677

678

handshake_set_private_extensions = (

679

_library.gnutls_handshake_set_private_extensions)

680

handshake_set_private_extensions.argtypes = [session_t,

681

ctypes.c_int]

682

handshake_set_private_extensions.restype = None

683

684

credentials_set = _library.gnutls_credentials_set

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

687

credentials_set.restype = _error_code

688

689

strerror = _library.gnutls_strerror

690

strerror.argtypes = [ctypes.c_int]

691

strerror.restype = ctypes.c_char_p

692

693

certificate_type_get = _library.gnutls_certificate_type_get

694

certificate_type_get.argtypes = [session_t]

695

certificate_type_get.restype = _error_code

696

697

certificate_get_peers = _library.gnutls_certificate_get_peers

698

certificate_get_peers.argtypes = [session_t,

699

ctypes.POINTER(ctypes.c_uint)]

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

701

702

global_set_log_level = _library.gnutls_global_set_log_level

703

global_set_log_level.argtypes = [ctypes.c_int]

704

global_set_log_level.restype = None

705

706

global_set_log_function = _library.gnutls_global_set_log_function

707

global_set_log_function.argtypes = [log_func]

708

global_set_log_function.restype = None

709

710

deinit = _library.gnutls_deinit

711

deinit.argtypes = [session_t]

712

deinit.restype = None

713

714

handshake = _library.gnutls_handshake

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

717

handshake.errcheck = _retry_on_error

718

719

transport_set_ptr = _library.gnutls_transport_set_ptr

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

721

transport_set_ptr.restype = None

722

723

bye = _library.gnutls_bye

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

726

bye.errcheck = _retry_on_error

727

728

check_version = _library.gnutls_check_version

729

check_version.argtypes = [ctypes.c_char_p]

730

check_version.restype = ctypes.c_char_p

731

732

_need_version = b"3.3.0"

733

if check_version(_need_version) is None:

734

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

735

.format(_need_version))

736

737

_tls_rawpk_version = b"3.6.6"

738

has_rawpk = bool(check_version(_tls_rawpk_version))

739

740

if has_rawpk:

741

# Types

742

class pubkey_st(ctypes.Structure):

743

_fields = []

744

pubkey_t = ctypes.POINTER(pubkey_st)

745

746

x509_crt_fmt_t = ctypes.c_int

747

748

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

749

pubkey_init = _library.gnutls_pubkey_init

750

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

751

pubkey_init.restype = _error_code

752

753

pubkey_import = _library.gnutls_pubkey_import

754

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

755

x509_crt_fmt_t]

756

pubkey_import.restype = _error_code

757

758

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

759

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

760

ctypes.POINTER(ctypes.c_ubyte),

761

ctypes.POINTER(ctypes.c_size_t)]

762

pubkey_get_key_id.restype = _error_code

763

764

pubkey_deinit = _library.gnutls_pubkey_deinit

765

pubkey_deinit.argtypes = [pubkey_t]

766

pubkey_deinit.restype = None

767

else:

768

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

769

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

771

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

772

openpgp_crt_init.restype = _error_code

773

774

openpgp_crt_import = _library.gnutls_openpgp_crt_import

775

openpgp_crt_import.argtypes = [openpgp_crt_t,

776

ctypes.POINTER(datum_t),

777

openpgp_crt_fmt_t]

778

openpgp_crt_import.restype = _error_code

779

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

783

openpgp_crt_verify_self.restype = _error_code

784

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

786

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

787

openpgp_crt_deinit.restype = None

788

789

openpgp_crt_get_fingerprint = (

790

_library.gnutls_openpgp_crt_get_fingerprint)

791

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

792

ctypes.c_void_p,

793

ctypes.POINTER(

794

ctypes.c_size_t)]

795

openpgp_crt_get_fingerprint.restype = _error_code

796

797

if check_version("3.6.4"):

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

800

certificate_type_get2.restype = _error_code

801

802

# Remove non-public functions

803

del _error_code, _retry_on_error

804

805

806

def call_pipe(connection, # : multiprocessing.Connection

807

func, *args, **kwargs):

808

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

809

810

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

811

return value on the provided multiprocessing.Connection.

812

"""

813

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

814

connection.close()

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

815

406

816

407

817

408

class Client(object):

818

409

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

819

410

820

411

Attributes:

821

412

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

822

413

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

824

415

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

825

416

to see if the client lives.

826

417

'None' if no process is running.

827

checker_callback_tag: a GLib event source tag, or None

418

checker_callback_tag: a gobject event source tag, or None

828

419

checker_command: string; External command which is run to check

829

420

if client lives. %() expansions are done at

830

421

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

831

422

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

832

checker_initiator_tag: a GLib event source tag, or None

423

checker_initiator_tag: a gobject event source tag, or None

833

424

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

834

425

client_structure: Object describing what attributes a client has

835

426

and is used for storing the client at exit

836

427

current_checker_command: string; current running checker_command

837

disable_initiator_tag: a GLib event source tag, or None

428

disable_initiator_tag: a gobject event source tag, or None

838

429

enabled: bool()

839

430

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

840

uniquely identify an OpenPGP client

841

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

842

a client using raw public keys

431

uniquely identify the client

843

432

host: string; available for use by the checker command

844

433

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

845

434

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

847

436

last_checker_status: integer between 0 and 255 reflecting exit

848

437

status of last checker. -1 reflects crashed

849

438

checker, -2 means no checker completed yet.

850

last_checker_signal: The signal which killed the last checker, if

851

last_checker_status is -1

852

439

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

853

440

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

854

441

D-Bus identifiers

861

448

disabled, or None

862

449

server_settings: The server_settings dict from main()

863

450

"""

864

451

865

452

runtime_expansions = ("approval_delay", "approval_duration",

866

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

453

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

867

454

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

868

455

"last_approval_request", "last_checked_ok",

869

456

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

870

client_defaults = {

871

"timeout": "PT5M",

872

"extended_timeout": "PT15M",

873

"interval": "PT2M",

874

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

875

"host": "",

876

"approval_delay": "PT0S",

877

"approval_duration": "PT1S",

878

"approved_by_default": "True",

879

"enabled": "True",

880

}

881

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

882

483

@staticmethod

883

484

def config_parser(config):

884

485

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

891

492

for client_name in config.sections():

892

493

section = dict(config.items(client_name))

893

494

client = settings[client_name] = {}

894

495

895

496

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

896

497

# Reformat values from string types to Python types

897

498

client["approved_by_default"] = config.getboolean(

898

499

client_name, "approved_by_default")

899

500

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

900

501

"enabled")

901

902

# Uppercase and remove spaces from key_id and fingerprint

903

# for later comparison purposes with return value from the

904

# key_id() and fingerprint() functions

905

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

906

.replace(" ", ""))

502

907

503

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

908

504

.replace(" ", ""))

909

505

if "secret" in section:

910

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

911

.encode("utf-8"),

912

"base64")

506

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

913

507

elif "secfile" in section:

914

508

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

915

509

(section["secfile"])),

916

510

"rb") as secfile:

917

511

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

918

512

else:

919

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

513

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

920

514

.format(section))

921

515

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

922

516

client["extended_timeout"] = string_to_delta(

930

524

client["last_approval_request"] = None

931

525

client["last_checked_ok"] = None

932

526

client["last_checker_status"] = -2

933

527

934

528

return settings

935

936

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

529

530

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

937

531

self.name = name

938

532

if server_settings is None:

939

533

server_settings = {}

940

534

self.server_settings = server_settings

941

535

# adding all client settings

942

for setting, value in settings.items():

536

for setting, value in settings.iteritems():

943

537

setattr(self, setting, value)

944

538

945

539

if self.enabled:

946

540

if not hasattr(self, "last_enabled"):

947

541

self.last_enabled = datetime.datetime.utcnow()

951

545

else:

952

546

self.last_enabled = None

953

547

self.expires = None

954

548

955

549

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

956

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

957

553

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

958

554

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

959

555

datetime.datetime.utcnow())

960

556

961

557

# attributes specific for this server instance

962

558

self.checker = None

963

559

self.checker_initiator_tag = None

966

562

self.current_checker_command = None

967

563

self.approved = None

968

564

self.approvals_pending = 0

969

self.changedstate = multiprocessing_manager.Condition(

970

multiprocessing_manager.Lock())

971

self.client_structure = [attr

972

for attr in self.__dict__.keys()

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

973

570

if not attr.startswith("_")]

974

571

self.client_structure.append("client_structure")

975

976

for name, t in inspect.getmembers(

977

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

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

978

577

if not name.startswith("_"):

979

578

self.client_structure.append(name)

980

579

981

580

# Send notice to process children that client state has changed

982

581

def send_changedstate(self):

983

582

with self.changedstate:

984

583

self.changedstate.notify_all()

985

584

986

585

def enable(self):

987

586

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

988

587

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

993

592

self.last_enabled = datetime.datetime.utcnow()

994

593

self.init_checker()

995

594

self.send_changedstate()

996

595

997

596

def disable(self, quiet=True):

998

597

"""Disable this client."""

999

598

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

1001

600

if not quiet:

1002

601

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

1003

602

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

1004

GLib.source_remove(self.disable_initiator_tag)

603

gobject.source_remove(self.disable_initiator_tag)

1005

604

self.disable_initiator_tag = None

1006

605

self.expires = None

1007

606

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

1008

GLib.source_remove(self.checker_initiator_tag)

607

gobject.source_remove(self.checker_initiator_tag)

1009

608

self.checker_initiator_tag = None

1010

609

self.stop_checker()

1011

610

self.enabled = False

1012

611

if not quiet:

1013

612

self.send_changedstate()

1014

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

613

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

1015

614

return False

1016

615

1017

616

def __del__(self):

1018

617

self.disable()

1019

618

1020

619

def init_checker(self):

1021

620

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

1022

621

# and every interval from then on.

1023

622

if self.checker_initiator_tag is not None:

1024

GLib.source_remove(self.checker_initiator_tag)

1025

self.checker_initiator_tag = GLib.timeout_add(

1026

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

1027

self.start_checker)

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

1028

627

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

1029

628

if self.disable_initiator_tag is not None:

1030

GLib.source_remove(self.disable_initiator_tag)

1031

self.disable_initiator_tag = GLib.timeout_add(

1032

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

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

1033

633

# Also start a new checker *right now*.

1034

634

self.start_checker()

1035

1036

def checker_callback(self, source, condition, connection,

1037

command):

635

636

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

1038

637

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

1039

638

self.checker_callback_tag = None

1040

639

self.checker = None

1041

# Read return code from connection (see call_pipe)

1042

returncode = connection.recv()

1043

connection.close()

1044

1045

if returncode >= 0:

1046

self.last_checker_status = returncode

1047

self.last_checker_signal = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1048

642

if self.last_checker_status == 0:

1049

643

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

1050

644

vars(self))

1051

645

self.checked_ok()

1052

646

else:

1053

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

647

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

648

vars(self))

1054

649

else:

1055

650

self.last_checker_status = -1

1056

self.last_checker_signal = -returncode

1057

651

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

1058

652

vars(self))

1059

return False

1060

653

1061

654

def checked_ok(self):

1062

655

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

1063

656

self.last_checked_ok = datetime.datetime.utcnow()

1064

657

self.last_checker_status = 0

1065

self.last_checker_signal = None

1066

658

self.bump_timeout()

1067

659

1068

660

def bump_timeout(self, timeout=None):

1069

661

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

1070

662

if timeout is None:

1071

663

timeout = self.timeout

1072

664

if self.disable_initiator_tag is not None:

1073

GLib.source_remove(self.disable_initiator_tag)

665

gobject.source_remove(self.disable_initiator_tag)

1074

666

self.disable_initiator_tag = None

1075

667

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

1076

self.disable_initiator_tag = GLib.timeout_add(

1077

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1078

671

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

1079

672

1080

673

def need_approval(self):

1081

674

self.last_approval_request = datetime.datetime.utcnow()

1082

675

1083

676

def start_checker(self):

1084

677

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

1085

678

1086

679

If a checker already exists, leave it running and do

1087

680

nothing."""

1088

681

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

1093

686

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

1094

687

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

1095

688

# should be.

1096

1097

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

1098

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

1099

self.checker.join()

1100

self.checker = None

689

690

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

691

try:

692

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

693

except (AttributeError, OSError) as error:

694

if (isinstance(error, OSError)

695

and error.errno != errno.ECHILD):

696

raise error

697

else:

698

if pid:

699

logger.warning("Checker was a zombie")

700

gobject.source_remove(self.checker_callback_tag)

701

self.checker_callback(pid, status,

702

self.current_checker_command)

1101

703

# Start a new checker if needed

1102

704

if self.checker is None:

1103

705

# Escape attributes for the shell

1104

escaped_attrs = {

1105

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

1106

for attr in self.runtime_expansions}

706

escaped_attrs = dict(

707

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

708

for attr in

709

self.runtime_expansions)

1107

710

try:

1108

711

command = self.checker_command % escaped_attrs

1109

712

except TypeError as error:

1110

713

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

1111

self.checker_command,

714

self.checker_command, exc_info=error)

715

return True # Try again later

716

self.current_checker_command = command

717

try:

718

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

719

command, self.name)

720

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

721

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

722

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

723

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

self.checker = subprocess.Popen(command,

733

close_fds=True,

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

1112

738

exc_info=error)

1113

return True # Try again later

1114

self.current_checker_command = command

1115

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

1116

self.name)

1117

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

1118

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

1119

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

1120

# always replaced by /dev/null.)

1121

# The exception is when not debugging but nevertheless

1122

# running in the foreground; use the previously

1123

# created wnull.

1124

popen_args = {"close_fds": True,

1125

"shell": True,

1126

"cwd": "/"}

1127

if (not self.server_settings["debug"]

1128

and self.server_settings["foreground"]):

1129

popen_args.update({"stdout": wnull,

1130

"stderr": wnull})

1131

pipe = multiprocessing.Pipe(duplex=False)

1132

self.checker = multiprocessing.Process(

1133

target=call_pipe,

1134

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

1135

kwargs=popen_args)

1136

self.checker.start()

1137

self.checker_callback_tag = GLib.io_add_watch(

1138

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

1139

self.checker_callback, pipe[0], command)

1140

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

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

758

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

1141

759

return True

1142

760

1143

761

def stop_checker(self):

1144

762

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

1145

763

if self.checker_callback_tag:

1146

GLib.source_remove(self.checker_callback_tag)

764

gobject.source_remove(self.checker_callback_tag)

1147

765

self.checker_callback_tag = None

1148

766

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

1149

767

return

1150

768

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

1151

self.checker.terminate()

769

try:

770

self.checker.terminate()

771

#time.sleep(0.5)

772

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

773

# self.checker.kill()

774

except OSError as error:

775

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

776

raise

1152

777

self.checker = None

1153

778

1154

779

1155

def dbus_service_property(dbus_interface,

1156

signature="v",

1157

access="readwrite",

1158

byte_arrays=False):

780

def dbus_service_property(dbus_interface, signature="v",

781

access="readwrite", byte_arrays=False):

1159

782

"""Decorators for marking methods of a DBusObjectWithProperties to

1160

783

become properties on the D-Bus.

1161

784

1162

785

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

1163

786

and with one argument by "Set".

1164

787

1165

788

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

1166

789

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

1167

790

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

1170

793

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

1171

794

if byte_arrays and signature != "ay":

1172

795

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

1173

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

1174

796

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

1175

797

def decorator(func):

1176

798

func._dbus_is_property = True

1177

799

func._dbus_interface = dbus_interface

1180

802

func._dbus_name = func.__name__

1181

803

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

1182

804

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

1183

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

805

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1184

806

return func

1185

1186

807

return decorator

1187

808

1188

809

1189

810

def dbus_interface_annotations(dbus_interface):

1190

811

"""Decorator for marking functions returning interface annotations

1191

812

1192

813

Usage:

1193

814

1194

815

@dbus_interface_annotations("org.example.Interface")

1195

816

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

1196

817

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

1197

818

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

1198

819

"false"}

1199

820

"""

1200

1201

821

def decorator(func):

1202

822

func._dbus_is_interface = True

1203

823

func._dbus_interface = dbus_interface

1204

824

func._dbus_name = dbus_interface

1205

825

return func

1206

1207

826

return decorator

1208

827

1209

828

1210

829

def dbus_annotations(annotations):

1211

830

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

1212

831

Usage:

1213

1214

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

1215

"org.freedesktop.DBus.Property."

1216

"EmitsChangedSignal": "false"})

832

1217

833

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

1218

834

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

1219

838

def Property_dbus_property(self):

1220

839

return dbus.Boolean(False)

1221

1222

See also the DBusObjectWithAnnotations class.

1223

840

"""

1224

1225

841

def decorator(func):

1226

842

func._dbus_annotations = annotations

1227

843

return func

1228

1229

844

return decorator

1230

845

1231

846

1232

847

class DBusPropertyException(dbus.exceptions.DBusException):

1233

848

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

1234

849

"""

1235

pass

850

def __unicode__(self):

851

return unicode(str(self))

1236

852

1237

853

1238

854

class DBusPropertyAccessException(DBusPropertyException):

1247

863

pass

1248

864

1249

865

1250

class DBusObjectWithAnnotations(dbus.service.Object):

1251

"""A D-Bus object with annotations.

1252

1253

Classes inheriting from this can use the dbus_annotations

1254

decorator to add annotations to methods or signals.

866

class DBusObjectWithProperties(dbus.service.Object):

867

"""A D-Bus object with properties.

868

869

Classes inheriting from this can use the dbus_service_property

870

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

871

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

1255

872

"""

1256

873

1257

874

@staticmethod

1258

875

def _is_dbus_thing(thing):

1259

876

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

1260

877

1261

878

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

1262

879

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

1263

880

"""

1264

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

881

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

1265

882

False)

1266

883

1267

884

def _get_all_dbus_things(self, thing):

1268

885

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

1269

886

"""

1270

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

887

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

888

name),

1271

889

athing.__get__(self))

1272

890

for cls in self.__class__.__mro__

1273

891

for name, athing in

1274

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

1275

1276

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1277

out_signature="s",

1278

path_keyword='object_path',

1279

connection_keyword='connection')

1280

def Introspect(self, object_path, connection):

1281

"""Overloading of standard D-Bus method.

1282

1283

Inserts annotation tags on methods and signals.

1284

"""

1285

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

1286

connection)

1287

try:

1288

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

1289

1290

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

1291

# Add annotation tags

1292

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

1293

for tag in if_tag.getElementsByTagName(typ):

1294

annots = dict()

1295

for name, prop in (self.

1296

_get_all_dbus_things(typ)):

1297

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

1298

and prop._dbus_interface

1299

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

1300

annots.update(getattr(

1301

prop, "_dbus_annotations", {}))

1302

for name, value in annots.items():

1303

ann_tag = document.createElement(

1304

"annotation")

1305

ann_tag.setAttribute("name", name)

1306

ann_tag.setAttribute("value", value)

1307

tag.appendChild(ann_tag)

1308

# Add interface annotation tags

1309

for annotation, value in dict(

1310

itertools.chain.from_iterable(

1311

annotations().items()

1312

for name, annotations

1313

in self._get_all_dbus_things("interface")

1314

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

1315

)).items():

1316

ann_tag = document.createElement("annotation")

1317

ann_tag.setAttribute("name", annotation)

1318

ann_tag.setAttribute("value", value)

1319

if_tag.appendChild(ann_tag)

1320

# Fix argument name for the Introspect method itself

1321

if (if_tag.getAttribute("name")

1322

== dbus.INTROSPECTABLE_IFACE):

1323

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

1324

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

1325

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

1326

if (arg.getAttribute("direction")

1327

== "out"):

1328

arg.setAttribute("name",

1329

"xml_data")

1330

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

1331

document.unlink()

1332

except (AttributeError, xml.dom.DOMException,

1333

xml.parsers.expat.ExpatError) as error:

1334

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

1335

exc_info=error)

1336

return xmlstring

1337

1338

1339

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1340

"""A D-Bus object with properties.

1341

1342

Classes inheriting from this can use the dbus_service_property

1343

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

1344

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

1345

"""

1346

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

894

1347

895

def _get_dbus_property(self, interface_name, property_name):

1348

896

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

1349

897

property with the specified name and interface.

1350

898

"""

1351

for cls in self.__class__.__mro__:

1352

for name, value in inspect.getmembers(

1353

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

899

for cls in self.__class__.__mro__:

900

for name, value in (inspect.getmembers

901

(cls,

902

self._is_dbus_thing("property"))):

1354

903

if (value._dbus_name == property_name

1355

904

and value._dbus_interface == interface_name):

1356

905

return value.__get__(self)

1357

906

1358

907

# No such property

1359

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

1360

self.dbus_object_path, interface_name, property_name))

1361

1362

@classmethod

1363

def _get_all_interface_names(cls):

1364

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

1365

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

1366

"_dbus_interface", None)

1367

for x in (inspect.getmro(cls))

1368

for attr in dir(x))

1369

if name is not None)

1370

1371

@dbus.service.method(dbus.PROPERTIES_IFACE,

1372

in_signature="ss",

908

raise DBusPropertyNotFound(self.dbus_object_path + ":"

909

+ interface_name + "."

910

+ property_name)

911

912

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

1373

913

out_signature="v")

1374

914

def Get(self, interface_name, property_name):

1375

915

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

1381

921

if not hasattr(value, "variant_level"):

1382

922

return value

1383

923

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

1384

924

1385

925

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

1386

926

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

1387

927

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

1393

933

# The byte_arrays option is not supported yet on

1394

934

# signatures other than "ay".

1395

935

if prop._dbus_signature != "ay":

1396

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

1397

"'ay' signature {!r}"

1398

.format(prop._dbus_signature))

936

raise ValueError

1399

937

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

1400

938

for byte in value))

1401

939

prop(value)

1402

1403

@dbus.service.method(dbus.PROPERTIES_IFACE,

1404

in_signature="s",

940

941

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

1405

942

out_signature="a{sv}")

1406

943

def GetAll(self, interface_name):

1407

944

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

1408

945

standard.

1409

946

1410

947

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

1411

948

"""

1412

949

properties = {}

1422

959

if not hasattr(value, "variant_level"):

1423

960

properties[name] = value

1424

961

continue

1425

properties[name] = type(value)(

1426

value, variant_level=value.variant_level + 1)

962

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

963

value.variant_level+1)

1427

964

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

1428

1429

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

1430

def PropertiesChanged(self, interface_name, changed_properties,

1431

invalidated_properties):

1432

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

1433

standard.

1434

"""

1435

pass

1436

965

1437

966

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1438

967

out_signature="s",

1439

968

path_keyword='object_path',

1440

969

connection_keyword='connection')

1441

970

def Introspect(self, object_path, connection):

1442

971

"""Overloading of standard D-Bus method.

1443

972

1444

973

Inserts property tags and interface annotation tags.

1445

974

"""

1446

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1447

object_path,

1448

connection)

975

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

976

connection)

1449

977

try:

1450

978

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

1451

1452

979

def make_tag(document, name, prop):

1453

980

e = document.createElement("property")

1454

981

e.setAttribute("name", name)

1455

982

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

1456

983

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

1457

984

return e

1458

1459

985

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

1460

986

# Add property tags

1461

987

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

1464

990

if prop._dbus_interface

1465

991

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

1466

992

if_tag.appendChild(tag)

1467

# Add annotation tags for properties

1468

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

1469

annots = dict()

1470

for name, prop in self._get_all_dbus_things(

1471

"property"):

1472

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

1473

and prop._dbus_interface

1474

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

1475

annots.update(getattr(

1476

prop, "_dbus_annotations", {}))

1477

for name, value in annots.items():

1478

ann_tag = document.createElement(

1479

"annotation")

1480

ann_tag.setAttribute("name", name)

1481

ann_tag.setAttribute("value", value)

1482

tag.appendChild(ann_tag)

993

# Add annotation tags

994

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

995

for tag in if_tag.getElementsByTagName(typ):

996

annots = dict()

997

for name, prop in (self.

998

_get_all_dbus_things(typ)):

999

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

1000

and prop._dbus_interface

1001

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1007

ann_tag = document.createElement(

1008

"annotation")

1009

ann_tag.setAttribute("name", name)

1010

ann_tag.setAttribute("value", value)

1011

tag.appendChild(ann_tag)

1012

# Add interface annotation tags

1013

for annotation, value in dict(

1014

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1018

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

1019

)).iteritems():

1020

ann_tag = document.createElement("annotation")

1021

ann_tag.setAttribute("name", annotation)

1022

ann_tag.setAttribute("value", value)

1023

if_tag.appendChild(ann_tag)

1483

1024

# Add the names to the return values for the

1484

1025

# "org.freedesktop.DBus.Properties" methods

1485

1026

if (if_tag.getAttribute("name")

1504

1045

return xmlstring

1505

1046

1506

1047

1507

try:

1508

dbus.OBJECT_MANAGER_IFACE

1509

except AttributeError:

1510

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

1511

1512

1513

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1514

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

1515

1516

Classes inheriting from this exposes the standard

1517

GetManagedObjects call and the InterfacesAdded and

1518

InterfacesRemoved signals on the standard

1519

"org.freedesktop.DBus.ObjectManager" interface.

1520

1521

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

1522

manually.

1523

"""

1524

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1525

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

1526

def GetManagedObjects(self):

1527

"""This function must be overridden"""

1528

raise NotImplementedError()

1529

1530

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1531

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

1532

def InterfacesAdded(self, object_path, interfaces_and_properties):

1533

pass

1534

1535

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

1536

def InterfacesRemoved(self, object_path, interfaces):

1537

pass

1538

1539

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1540

out_signature="s",

1541

path_keyword='object_path',

1542

connection_keyword='connection')

1543

def Introspect(self, object_path, connection):

1544

"""Overloading of standard D-Bus method.

1545

1546

Override return argument name of GetManagedObjects to be

1547

"objpath_interfaces_and_properties"

1548

"""

1549

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1550

object_path,

1551

connection)

1552

try:

1553

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

1554

1555

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

1556

# Fix argument name for the GetManagedObjects method

1557

if (if_tag.getAttribute("name")

1558

== dbus.OBJECT_MANAGER_IFACE):

1559

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

1560

if (cn.getAttribute("name")

1561

== "GetManagedObjects"):

1562

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

1563

if (arg.getAttribute("direction")

1564

== "out"):

1565

arg.setAttribute(

1566

"name",

1567

"objpath_interfaces"

1568

"_and_properties")

1569

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

1570

document.unlink()

1571

except (AttributeError, xml.dom.DOMException,

1572

xml.parsers.expat.ExpatError) as error:

1573

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

1574

exc_info=error)

1575

return xmlstring

1576

1577

1578

1048

def datetime_to_dbus(dt, variant_level=0):

1579

1049

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

1580

1050

if dt is None:

1581

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

1582

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

1051

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

1052

return dbus.String(dt.isoformat(),

1053

variant_level=variant_level)

1583

1054

1584

1055

1585

1056

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1587

1058

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

1588

1059

interface names according to the "alt_interface_names" mapping.

1589

1060

Usage:

1590

1061

1591

1062

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

1592

1063

"net.example.AlternateInterface"})

1593

1064

class SampleDBusObject(dbus.service.Object):

1594

1065

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

1595

1066

def SampleDBusMethod():

1596

1067

pass

1597

1068

1598

1069

The above "SampleDBusMethod" on "SampleDBusObject" will be

1599

1070

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

1600

1071

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

1601

1072

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

1602

1073

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

1603

1074

1604

1075

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

1605

1076

(from DBusObjectWithProperties) and interfaces (from the

1606

1077

dbus_interface_annotations decorator).

1607

1078

"""

1608

1609

1079

def wrapper(cls):

1610

1080

for orig_interface_name, alt_interface_name in (

1611

alt_interface_names.items()):

1081

alt_interface_names.iteritems()):

1612

1082

attr = {}

1613

1083

interface_names = set()

1614

1084

# Go though all attributes of the class

1616

1086

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

1617

1087

# with the wrong interface name

1618

1088

if (not hasattr(attribute, "_dbus_interface")

1619

or not attribute._dbus_interface.startswith(

1620

orig_interface_name)):

1089

or not attribute._dbus_interface

1090

.startswith(orig_interface_name)):

1621

1091

continue

1622

1092

# Create an alternate D-Bus interface name based on

1623

1093

# the current name

1624

alt_interface = attribute._dbus_interface.replace(

1625

orig_interface_name, alt_interface_name)

1094

alt_interface = (attribute._dbus_interface

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1626

1097

interface_names.add(alt_interface)

1627

1098

# Is this a D-Bus signal?

1628

1099

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

1629

1100

# Extract the original non-method undecorated

1630

1101

# function by black magic

1631

if sys.version_info.major == 2:

1632

nonmethod_func = (dict(

1102

nonmethod_func = (dict(

1633

1103

zip(attribute.func_code.co_freevars,

1634

attribute.__closure__))

1635

["func"].cell_contents)

1636

else:

1637

nonmethod_func = (dict(

1638

zip(attribute.__code__.co_freevars,

1639

attribute.__closure__))

1640

["func"].cell_contents)

1104

attribute.__closure__))["func"]

1105

.cell_contents)

1641

1106

# Create a new, but exactly alike, function

1642

1107

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

1643

1108

# with the alternate D-Bus interface name

1644

new_function = copy_function(nonmethod_func)

1645

new_function = (dbus.service.signal(

1646

alt_interface,

1647

attribute._dbus_signature)(new_function))

1109

new_function = (dbus.service.signal

1110

(alt_interface,

1111

attribute._dbus_signature)

1112

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1648

1118

# Copy annotations, if any

1649

1119

try:

1650

new_function._dbus_annotations = dict(

1651

attribute._dbus_annotations)

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1652

1122

except AttributeError:

1653

1123

pass

1654

1655

1124

# Define a creator of a function to call both the

1656

1125

# original and alternate functions, so both the

1657

1126

# original and alternate signals gets sent when

1660

1129

"""This function is a scope container to pass

1661

1130

func1 and func2 to the "call_both" function

1662

1131

outside of its arguments"""

1663

1664

@functools.wraps(func2)

1665

1132

def call_both(*args, **kwargs):

1666

1133

"""This function will emit two D-Bus

1667

1134

signals by calling func1 and func2"""

1668

1135

func1(*args, **kwargs)

1669

1136

func2(*args, **kwargs)

1670

# Make wrapper function look like a D-Bus

1671

# signal

1672

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

1673

if name.startswith("_dbus_"):

1674

setattr(call_both, name, attr)

1675

1676

1137

return call_both

1677

1138

# Create the "call_both" function and add it to

1678

1139

# the class

1683

1144

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

1684

1145

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

1685

1146

# to the class.

1686

attr[attrname] = (

1687

dbus.service.method(

1688

alt_interface,

1689

attribute._dbus_in_signature,

1690

attribute._dbus_out_signature)

1691

(copy_function(attribute)))

1147

attr[attrname] = (dbus.service.method

1148

(alt_interface,

1149

attribute._dbus_in_signature,

1150

attribute._dbus_out_signature)

1151

(types.FunctionType

1152

(attribute.func_code,

1153

attribute.func_globals,

1154

attribute.func_name,

1155

attribute.func_defaults,

1156

attribute.func_closure)))

1692

1157

# Copy annotations, if any

1693

1158

try:

1694

attr[attrname]._dbus_annotations = dict(

1695

attribute._dbus_annotations)

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1696

1161

except AttributeError:

1697

1162

pass

1698

1163

# Is this a D-Bus property?

1701

1166

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

1702

1167

# property with the alternate D-Bus interface

1703

1168

# name. Add it to the class.

1704

attr[attrname] = (dbus_service_property(

1705

alt_interface, attribute._dbus_signature,

1706

attribute._dbus_access,

1707

attribute._dbus_get_args_options

1708

["byte_arrays"])

1709

(copy_function(attribute)))

1169

attr[attrname] = (dbus_service_property

1170

(alt_interface,

1171

attribute._dbus_signature,

1172

attribute._dbus_access,

1173

attribute

1174

._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType

1177

(attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

attribute.func_closure)))

1710

1182

# Copy annotations, if any

1711

1183

try:

1712

attr[attrname]._dbus_annotations = dict(

1713

attribute._dbus_annotations)

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1714

1186

except AttributeError:

1715

1187

pass

1716

1188

# Is this a D-Bus interface?

1719

1191

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

1720

1192

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

1721

1193

# to the class.

1722

attr[attrname] = (

1723

dbus_interface_annotations(alt_interface)

1724

(copy_function(attribute)))

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1725

1202

if deprecate:

1726

1203

# Deprecate all alternate interfaces

1727

iname = "_AlternateDBusNames_interface_annotation{}"

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1728

1205

for interface_name in interface_names:

1729

1730

1206

@dbus_interface_annotations(interface_name)

1731

1207

def func(self):

1732

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

1733

"true"}

1208

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

1209

"true" }

1734

1210

# Find an unused name

1735

1211

for aname in (iname.format(i)

1736

1212

for i in itertools.count()):

1740

1216

if interface_names:

1741

1217

# Replace the class with a new subclass of it with

1742

1218

# methods, signals, etc. as created above.

1743

if sys.version_info.major == 2:

1744

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

1745

(cls, ), attr)

1746

else:

1747

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

1748

(cls, ), attr)

1219

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

1220

(cls,), attr)

1749

1221

return cls

1750

1751

1222

return wrapper

1752

1223

1753

1224

1754

1225

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

1755

"se.bsnet.fukt.Mandos"})

1226

"se.bsnet.fukt.Mandos"})

1756

1227

class ClientDBus(Client, DBusObjectWithProperties):

1757

1228

"""A Client class using D-Bus

1758

1229

1759

1230

Attributes:

1760

1231

dbus_object_path: dbus.ObjectPath

1761

1232

bus: dbus.SystemBus()

1762

1233

"""

1763

1234

1764

1235

runtime_expansions = (Client.runtime_expansions

1765

+ ("dbus_object_path", ))

1766

1767

_interface = "se.recompile.Mandos.Client"

1768

1236

+ ("dbus_object_path",))

1237

1769

1238

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

1770

1771

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

1239

1240

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

1772

1241

self.bus = bus

1773

1242

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

1774

1243

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

1775

1244

# the D-Bus

1776

client_object_name = str(self.name).translate(

1245

client_object_name = unicode(self.name).translate(

1777

1246

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

1778

1247

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

1779

self.dbus_object_path = dbus.ObjectPath(

1780

"/clients/" + client_object_name)

1248

self.dbus_object_path = (dbus.ObjectPath

1249

("/clients/" + client_object_name))

1781

1250

DBusObjectWithProperties.__init__(self, self.bus,

1782

1251

self.dbus_object_path)

1783

1784

def notifychangeproperty(transform_func, dbus_name,

1785

type_func=lambda x: x,

1786

variant_level=1,

1787

invalidate_only=False,

1788

_interface=_interface):

1252

1253

def notifychangeproperty(transform_func,

1254

dbus_name, type_func=lambda x: x,

1255

variant_level=1):

1789

1256

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

1790

1257

its changes to DBus.

1791

1258

1792

1259

transform_fun: Function that takes a value and a variant_level

1793

1260

and transforms it to a D-Bus type.

1794

1261

dbus_name: D-Bus name of the variable

1796

1263

to the D-Bus. Default: no transform

1797

1264

variant_level: D-Bus variant level. Default: 1

1798

1265

"""

1799

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

1800

1266

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

1801

1267

def setter(self, value):

1802

1268

if hasattr(self, "dbus_object_path"):

1803

1269

if (not hasattr(self, attrname) or

1804

1270

type_func(getattr(self, attrname, None))

1805

1271

!= type_func(value)):

1806

if invalidate_only:

1807

self.PropertiesChanged(

1808

_interface, dbus.Dictionary(),

1809

dbus.Array((dbus_name, )))

1810

else:

1811

dbus_value = transform_func(

1812

type_func(value),

1813

variant_level=variant_level)

1814

self.PropertyChanged(dbus.String(dbus_name),

1815

dbus_value)

1816

self.PropertiesChanged(

1817

_interface,

1818

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

1819

dbus_value}),

1820

dbus.Array())

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1275

self.PropertyChanged(dbus.String(dbus_name),

1276

dbus_value)

1821

1277

setattr(self, attrname, value)

1822

1278

1823

1279

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

1824

1280

1825

1281

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1826

1282

approvals_pending = notifychangeproperty(dbus.Boolean,

1827

1283

"ApprovalPending",

1828

type_func=bool)

1284

type_func = bool)

1829

1285

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

1830

1286

last_enabled = notifychangeproperty(datetime_to_dbus,

1831

1287

"LastEnabled")

1832

checker = notifychangeproperty(

1833

dbus.Boolean, "CheckerRunning",

1834

type_func=lambda checker: checker is not None)

1288

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

1289

type_func = lambda checker:

1290

checker is not None)

1835

1291

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1836

1292

"LastCheckedOK")

1837

1293

last_checker_status = notifychangeproperty(dbus.Int16,

1840

1296

datetime_to_dbus, "LastApprovalRequest")

1841

1297

approved_by_default = notifychangeproperty(dbus.Boolean,

1842

1298

"ApprovedByDefault")

1843

approval_delay = notifychangeproperty(

1844

dbus.UInt64, "ApprovalDelay",

1845

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

1299

approval_delay = notifychangeproperty(dbus.UInt64,

1300

"ApprovalDelay",

1301

type_func =

1302

timedelta_to_milliseconds)

1846

1303

approval_duration = notifychangeproperty(

1847

1304

dbus.UInt64, "ApprovalDuration",

1848

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

1305

type_func = timedelta_to_milliseconds)

1849

1306

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

1850

timeout = notifychangeproperty(

1851

dbus.UInt64, "Timeout",

1852

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

1307

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

1308

type_func =

1309

timedelta_to_milliseconds)

1853

1310

extended_timeout = notifychangeproperty(

1854

1311

dbus.UInt64, "ExtendedTimeout",

1855

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

1856

interval = notifychangeproperty(

1857

dbus.UInt64, "Interval",

1858

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

1312

type_func = timedelta_to_milliseconds)

1313

interval = notifychangeproperty(dbus.UInt64,

1314

"Interval",

1315

type_func =

1316

timedelta_to_milliseconds)

1859

1317

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

1860

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

1861

invalidate_only=True)

1862

1318

1863

1319

del notifychangeproperty

1864

1320

1865

1321

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

1866

1322

try:

1867

1323

self.remove_from_connection()

1870

1326

if hasattr(DBusObjectWithProperties, "__del__"):

1871

1327

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

1872

1328

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

1873

1874

def checker_callback(self, source, condition,

1875

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

1876

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

1877

connection, command, *args,

1878

**kwargs)

1879

exitstatus = self.last_checker_status

1880

if exitstatus >= 0:

1329

1330

def checker_callback(self, pid, condition, command,

1331

*args, **kwargs):

1332

self.checker_callback_tag = None

1333

self.checker = None

1334

if os.WIFEXITED(condition):

1335

exitstatus = os.WEXITSTATUS(condition)

1881

1336

# Emit D-Bus signal

1882

1337

self.CheckerCompleted(dbus.Int16(exitstatus),

1883

# This is specific to GNU libC

1884

dbus.Int64(exitstatus << 8),

1338

dbus.Int64(condition),

1885

1339

dbus.String(command))

1886

1340

else:

1887

1341

# Emit D-Bus signal

1888

1342

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

1889

dbus.Int64(

1890

# This is specific to GNU libC

1891

(exitstatus << 8)

1892

| self.last_checker_signal),

1343

dbus.Int64(condition),

1893

1344

dbus.String(command))

1894

return ret

1895

1345

1346

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

1347

*args, **kwargs)

1348

1896

1349

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

1897

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

1350

old_checker = self.checker

1351

if self.checker is not None:

1352

old_checker_pid = self.checker.pid

1353

else:

1354

old_checker_pid = None

1898

1355

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

1899

1356

# Only if new checker process was started

1900

1357

if (self.checker is not None

1902

1359

# Emit D-Bus signal

1903

1360

self.CheckerStarted(self.current_checker_command)

1904

1361

return r

1905

1362

1906

1363

def _reset_approved(self):

1907

1364

self.approved = None

1908

1365

return False

1909

1366

1910

1367

def approve(self, value=True):

1911

1368

self.approved = value

1912

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

1913

* 1000), self._reset_approved)

1369

gobject.timeout_add(timedelta_to_milliseconds

1370

(self.approval_duration),

1371

self._reset_approved)

1914

1372

self.send_changedstate()

1915

1916

# D-Bus methods, signals & properties

1917

1918

# Interfaces

1919

1920

# Signals

1921

1373

1374

## D-Bus methods, signals & properties

1375

_interface = "se.recompile.Mandos.Client"

1376

1377

## Interfaces

1378

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

1383

1384

## Signals

1385

1922

1386

# CheckerCompleted - signal

1923

1387

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

1924

1388

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

1925

1389

"D-Bus signal"

1926

1390

pass

1927

1391

1928

1392

# CheckerStarted - signal

1929

1393

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

1930

1394

def CheckerStarted(self, command):

1931

1395

"D-Bus signal"

1932

1396

pass

1933

1397

1934

1398

# PropertyChanged - signal

1935

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

1936

1399

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

1937

1400

def PropertyChanged(self, property, value):

1938

1401

"D-Bus signal"

1939

1402

pass

1940

1403

1941

1404

# GotSecret - signal

1942

1405

@dbus.service.signal(_interface)

1943

1406

def GotSecret(self):

1946

1409

server to mandos-client

1947

1410

"""

1948

1411

pass

1949

1412

1950

1413

# Rejected - signal

1951

1414

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

1952

1415

def Rejected(self, reason):

1953

1416

"D-Bus signal"

1954

1417

pass

1955

1418

1956

1419

# NeedApproval - signal

1957

1420

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

1958

1421

def NeedApproval(self, timeout, default):

1959

1422

"D-Bus signal"

1960

1423

return self.need_approval()

1961

1962

# Methods

1963

1424

1425

## Methods

1426

1964

1427

# Approve - method

1965

1428

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

1966

1429

def Approve(self, value):

1967

1430

self.approve(value)

1968

1431

1969

1432

# CheckedOK - method

1970

1433

@dbus.service.method(_interface)

1971

1434

def CheckedOK(self):

1972

1435

self.checked_ok()

1973

1436

1974

1437

# Enable - method

1975

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

1976

1438

@dbus.service.method(_interface)

1977

1439

def Enable(self):

1978

1440

"D-Bus method"

1979

1441

self.enable()

1980

1442

1981

1443

# StartChecker - method

1982

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

1983

1444

@dbus.service.method(_interface)

1984

1445

def StartChecker(self):

1985

1446

"D-Bus method"

1986

1447

self.start_checker()

1987

1448

1988

1449

# Disable - method

1989

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

1990

1450

@dbus.service.method(_interface)

1991

1451

def Disable(self):

1992

1452

"D-Bus method"

1993

1453

self.disable()

1994

1454

1995

1455

# StopChecker - method

1996

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

1997

1456

@dbus.service.method(_interface)

1998

1457

def StopChecker(self):

1999

1458

self.stop_checker()

2000

2001

# Properties

2002

1459

1460

## Properties

1461

2003

1462

# ApprovalPending - property

2004

1463

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

2005

1464

def ApprovalPending_dbus_property(self):

2006

1465

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

2007

1466

2008

1467

# ApprovedByDefault - property

2009

@dbus_service_property(_interface,

2010

signature="b",

1468

@dbus_service_property(_interface, signature="b",

2011

1469

access="readwrite")

2012

1470

def ApprovedByDefault_dbus_property(self, value=None):

2013

1471

if value is None: # get

2014

1472

return dbus.Boolean(self.approved_by_default)

2015

1473

self.approved_by_default = bool(value)

2016

1474

2017

1475

# ApprovalDelay - property

2018

@dbus_service_property(_interface,

2019

signature="t",

1476

@dbus_service_property(_interface, signature="t",

2020

1477

access="readwrite")

2021

1478

def ApprovalDelay_dbus_property(self, value=None):

2022

1479

if value is None: # get

2023

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

2024

* 1000)

1480

return dbus.UInt64(self.approval_delay_milliseconds())

2025

1481

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

2026

1482

2027

1483

# ApprovalDuration - property

2028

@dbus_service_property(_interface,

2029

signature="t",

1484

@dbus_service_property(_interface, signature="t",

2030

1485

access="readwrite")

2031

1486

def ApprovalDuration_dbus_property(self, value=None):

2032

1487

if value is None: # get

2033

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

2034

* 1000)

1488

return dbus.UInt64(timedelta_to_milliseconds(

1489

self.approval_duration))

2035

1490

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

2036

1491

2037

1492

# Name - property

2038

@dbus_annotations(

2039

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

2040

1493

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

2041

1494

def Name_dbus_property(self):

2042

1495

return dbus.String(self.name)

2043

2044

# KeyID - property

2045

@dbus_annotations(

2046

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

2047

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

2048

def KeyID_dbus_property(self):

2049

return dbus.String(self.key_id)

2050

1496

2051

1497

# Fingerprint - property

2052

@dbus_annotations(

2053

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

2054

1498

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

2055

1499

def Fingerprint_dbus_property(self):

2056

1500

return dbus.String(self.fingerprint)

2057

1501

2058

1502

# Host - property

2059

@dbus_service_property(_interface,

2060

signature="s",

1503

@dbus_service_property(_interface, signature="s",

2061

1504

access="readwrite")

2062

1505

def Host_dbus_property(self, value=None):

2063

1506

if value is None: # get

2064

1507

return dbus.String(self.host)

2065

self.host = str(value)

2066

1508

self.host = unicode(value)

1509

2067

1510

# Created - property

2068

@dbus_annotations(

2069

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

2070

1511

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

2071

1512

def Created_dbus_property(self):

2072

1513

return datetime_to_dbus(self.created)

2073

1514

2074

1515

# LastEnabled - property

2075

1516

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

2076

1517

def LastEnabled_dbus_property(self):

2077

1518

return datetime_to_dbus(self.last_enabled)

2078

1519

2079

1520

# Enabled - property

2080

@dbus_service_property(_interface,

2081

signature="b",

1521

@dbus_service_property(_interface, signature="b",

2082

1522

access="readwrite")

2083

1523

def Enabled_dbus_property(self, value=None):

2084

1524

if value is None: # get

2087

1527

self.enable()

2088

1528

else:

2089

1529

self.disable()

2090

1530

2091

1531

# LastCheckedOK - property

2092

@dbus_service_property(_interface,

2093

signature="s",

1532

@dbus_service_property(_interface, signature="s",

2094

1533

access="readwrite")

2095

1534

def LastCheckedOK_dbus_property(self, value=None):

2096

1535

if value is not None:

2097

1536

self.checked_ok()

2098

1537

return

2099

1538

return datetime_to_dbus(self.last_checked_ok)

2100

1539

2101

1540

# LastCheckerStatus - property

2102

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

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

2103

1543

def LastCheckerStatus_dbus_property(self):

2104

1544

return dbus.Int16(self.last_checker_status)

2105

1545

2106

1546

# Expires - property

2107

1547

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

2108

1548

def Expires_dbus_property(self):

2109

1549

return datetime_to_dbus(self.expires)

2110

1550

2111

1551

# LastApprovalRequest - property

2112

1552

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

2113

1553

def LastApprovalRequest_dbus_property(self):

2114

1554

return datetime_to_dbus(self.last_approval_request)

2115

1555

2116

1556

# Timeout - property

2117

@dbus_service_property(_interface,

2118

signature="t",

1557

@dbus_service_property(_interface, signature="t",

2119

1558

access="readwrite")

2120

1559

def Timeout_dbus_property(self, value=None):

2121

1560

if value is None: # get

2122

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

1561

return dbus.UInt64(self.timeout_milliseconds())

2123

1562

old_timeout = self.timeout

2124

1563

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

2125

1564

# Reschedule disabling

2133

1572

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

2134

1573

is None):

2135

1574

return

2136

GLib.source_remove(self.disable_initiator_tag)

2137

self.disable_initiator_tag = GLib.timeout_add(

2138

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

2139

self.disable)

2140

1575

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1580

2141

1581

# ExtendedTimeout - property

2142

@dbus_service_property(_interface,

2143

signature="t",

1582

@dbus_service_property(_interface, signature="t",

2144

1583

access="readwrite")

2145

1584

def ExtendedTimeout_dbus_property(self, value=None):

2146

1585

if value is None: # get

2147

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

2148

* 1000)

1586

return dbus.UInt64(self.extended_timeout_milliseconds())

2149

1587

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

2150

1588

2151

1589

# Interval - property

2152

@dbus_service_property(_interface,

2153

signature="t",

1590

@dbus_service_property(_interface, signature="t",

2154

1591

access="readwrite")

2155

1592

def Interval_dbus_property(self, value=None):

2156

1593

if value is None: # get

2157

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

1594

return dbus.UInt64(self.interval_milliseconds())

2158

1595

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

2159

1596

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

2160

1597

return

2161

1598

if self.enabled:

2162

1599

# Reschedule checker run

2163

GLib.source_remove(self.checker_initiator_tag)

2164

self.checker_initiator_tag = GLib.timeout_add(

2165

value, self.start_checker)

2166

self.start_checker() # Start one now, too

2167

1600

gobject.source_remove(self.checker_initiator_tag)

1601

self.checker_initiator_tag = (gobject.timeout_add

1602

(value, self.start_checker))

1603

self.start_checker() # Start one now, too

1604

2168

1605

# Checker - property

2169

@dbus_service_property(_interface,

2170

signature="s",

1606

@dbus_service_property(_interface, signature="s",

2171

1607

access="readwrite")

2172

1608

def Checker_dbus_property(self, value=None):

2173

1609

if value is None: # get

2174

1610

return dbus.String(self.checker_command)

2175

self.checker_command = str(value)

2176

1611

self.checker_command = unicode(value)

1612

2177

1613

# CheckerRunning - property

2178

@dbus_service_property(_interface,

2179

signature="b",

1614

@dbus_service_property(_interface, signature="b",

2180

1615

access="readwrite")

2181

1616

def CheckerRunning_dbus_property(self, value=None):

2182

1617

if value is None: # get

2185

1620

self.start_checker()

2186

1621

else:

2187

1622

self.stop_checker()

2188

1623

2189

1624

# ObjectPath - property

2190

@dbus_annotations(

2191

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

2192

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

2193

1625

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

2194

1626

def ObjectPath_dbus_property(self):

2195

return self.dbus_object_path # is already a dbus.ObjectPath

2196

1627

return self.dbus_object_path # is already a dbus.ObjectPath

1628

2197

1629

# Secret = property

2198

@dbus_annotations(

2199

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

2200

"invalidates"})

2201

@dbus_service_property(_interface,

2202

signature="ay",

2203

access="write",

2204

byte_arrays=True)

1630

@dbus_service_property(_interface, signature="ay",

1631

access="write", byte_arrays=True)

2205

1632

def Secret_dbus_property(self, value):

2206

self.secret = bytes(value)

2207

1633

self.secret = str(value)

1634

2208

1635

del _interface

2209

1636

2210

1637

2211

1638

class ProxyClient(object):

2212

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

1639

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

2213

1640

self._pipe = child_pipe

2214

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

1641

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

2215

1642

if not self._pipe.recv():

2216

raise KeyError(key_id or fpr)

2217

1643

raise KeyError()

1644

2218

1645

def __getattribute__(self, name):

2219

1646

if name == '_pipe':

2220

1647

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

2223

1650

if data[0] == 'data':

2224

1651

return data[1]

2225

1652

if data[0] == 'function':

2226

2227

1653

def func(*args, **kwargs):

2228

1654

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

2229

1655

return self._pipe.recv()[1]

2230

2231

1656

return func

2232

1657

2233

1658

def __setattr__(self, name, value):

2234

1659

if name == '_pipe':

2235

1660

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

2238

1663

2239

1664

class ClientHandler(socketserver.BaseRequestHandler, object):

2240

1665

"""A class to handle client connections.

2241

1666

2242

1667

Instantiated once for each connection to handle it.

2243

1668

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

2244

1669

2245

1670

def handle(self):

2246

1671

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

2247

1672

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

2248

str(self.client_address))

1673

unicode(self.client_address))

2249

1674

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

2250

1675

self.server.child_pipe.fileno())

2251

2252

session = gnutls.ClientSession(self.request)

2253

2254

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

2255

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

2256

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

2257

# "+DHE-DSS"))

1676

1677

session = (gnutls.connection

1678

.ClientSession(self.request,

1679

gnutls.connection

1680

.X509Credentials()))

1681

1682

# Note: gnutls.connection.X509Credentials is really a

1683

# generic GnuTLS certificate credentials object so long as

1684

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

1685

# here despite using OpenPGP certificates.

1686

1687

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

1688

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

1689

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

1690

# "+DHE-DSS"))

2258

1691

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

2259

1692

priority = self.server.gnutls_priority

2260

1693

if priority is None:

2261

1694

priority = "NORMAL"

2262

gnutls.priority_set_direct(session._c_object,

2263

priority.encode("utf-8"),

2264

None)

2265

1695

(gnutls.library.functions

1696

.gnutls_priority_set_direct(session._c_object,

1697

priority, None))

1698

2266

1699

# Start communication using the Mandos protocol

2267

1700

# Get protocol number

2268

1701

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

2269

1702

logger.debug("Protocol version: %r", line)

2270

1703

try:

2271

1704

if int(line.strip().split()[0]) > 1:

2272

raise RuntimeError(line)

1705

raise RuntimeError

2273

1706

except (ValueError, IndexError, RuntimeError) as error:

2274

1707

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

2275

1708

return

2276

1709

2277

1710

# Start GnuTLS connection

2278

1711

try:

2279

1712

session.handshake()

2280

except gnutls.Error as error:

1713

except gnutls.errors.GNUTLSError as error:

2281

1714

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

2282

1715

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

2283

1716

# established. Just abandon the request.

2284

1717

return

2285

1718

logger.debug("Handshake succeeded")

2286

1719

2287

1720

approval_required = False

2288

1721

try:

2289

if gnutls.has_rawpk:

2290

fpr = ""

2291

try:

2292

key_id = self.key_id(

2293

self.peer_certificate(session))

2294

except (TypeError, gnutls.Error) as error:

2295

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

2296

return

2297

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

2298

2299

else:

2300

key_id = ""

2301

try:

2302

fpr = self.fingerprint(

2303

self.peer_certificate(session))

2304

except (TypeError, gnutls.Error) as error:

2305

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

2306

return

2307

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

2308

2309

try:

2310

client = ProxyClient(child_pipe, key_id, fpr,

1722

try:

1723

fpr = self.fingerprint(self.peer_certificate

1724

(session))

1725

except (TypeError,

1726

gnutls.errors.GNUTLSError) as error:

1727

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

1728

return

1729

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

1730

1731

try:

1732

client = ProxyClient(child_pipe, fpr,

2311

1733

self.client_address)

2312

1734

except KeyError:

2313

1735

return

2314

1736

2315

1737

if client.approval_delay:

2316

1738

delay = client.approval_delay

2317

1739

client.approvals_pending += 1

2318

1740

approval_required = True

2319

1741

2320

1742

while True:

2321

1743

if not client.enabled:

2322

1744

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

2323

client.name)

1745

client.name)

2324

1746

if self.server.use_dbus:

2325

1747

# Emit D-Bus signal

2326

1748

client.Rejected("Disabled")

2327

1749

return

2328

1750

2329

1751

if client.approved or not client.approval_delay:

2330

# We are approved or approval is disabled

1752

#We are approved or approval is disabled

2331

1753

break

2332

1754

elif client.approved is None:

2333

1755

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

2335

1757

if self.server.use_dbus:

2336

1758

# Emit D-Bus signal

2337

1759

client.NeedApproval(

2338

client.approval_delay.total_seconds()

2339

* 1000, client.approved_by_default)

1760

client.approval_delay_milliseconds(),

1761

client.approved_by_default)

2340

1762

else:

2341

1763

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

2342

1764

client.name)

2344

1766

# Emit D-Bus signal

2345

1767

client.Rejected("Denied")

2346

1768

return

2347

2348

# wait until timeout or approved

1769

1770

#wait until timeout or approved

2349

1771

time = datetime.datetime.now()

2350

1772

client.changedstate.acquire()

2351

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

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

2352

1776

client.changedstate.release()

2353

1777

time2 = datetime.datetime.now()

2354

1778

if (time2 - time) >= delay:

2364

1788

break

2365

1789

else:

2366

1790

delay -= time2 - time

2367

2368

try:

2369

session.send(client.secret)

2370

except gnutls.Error as error:

2371

logger.warning("gnutls send failed",

2372

exc_info=error)

2373

return

2374

1791

1792

sent_size = 0

1793

while sent_size < len(client.secret):

1794

try:

1795

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

1796

except gnutls.errors.GNUTLSError as error:

1797

logger.warning("gnutls send failed",

1798

exc_info=error)

1799

return

1800

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

1801

sent, len(client.secret)

1802

- (sent_size + sent))

1803

sent_size += sent

1804

2375

1805

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

2376

1806

# bump the timeout using extended_timeout

2377

1807

client.bump_timeout(client.extended_timeout)

2378

1808

if self.server.use_dbus:

2379

1809

# Emit D-Bus signal

2380

1810

client.GotSecret()

2381

1811

2382

1812

finally:

2383

1813

if approval_required:

2384

1814

client.approvals_pending -= 1

2385

1815

try:

2386

1816

session.bye()

2387

except gnutls.Error as error:

1817

except gnutls.errors.GNUTLSError as error:

2388

1818

logger.warning("GnuTLS bye failed",

2389

1819

exc_info=error)

2390

1820

2391

1821

@staticmethod

2392

1822

def peer_certificate(session):

2393

"Return the peer's certificate as a bytestring"

2394

try:

2395

cert_type = gnutls.certificate_type_get2(session._c_object,

2396

gnutls.CTYPE_PEERS)

2397

except AttributeError:

2398

cert_type = gnutls.certificate_type_get(session._c_object)

2399

if gnutls.has_rawpk:

2400

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2401

else:

2402

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2403

# If not a valid certificate type...

2404

if cert_type not in valid_cert_types:

2405

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

2406

valid_cert_types)

2407

# ...return invalid data

2408

return b""

1823

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

1824

# If not an OpenPGP certificate...

1825

if (gnutls.library.functions

1826

.gnutls_certificate_type_get(session._c_object)

1827

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1828

# ...do the normal thing

1829

return session.peer_certificate

2409

1830

list_size = ctypes.c_uint(1)

2410

cert_list = (gnutls.certificate_get_peers

1831

cert_list = (gnutls.library.functions

1832

.gnutls_certificate_get_peers

2411

1833

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

2412

1834

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

2413

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

1835

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

1836

" certificate")

2414

1837

if list_size.value == 0:

2415

1838

return None

2416

1839

cert = cert_list[0]

2417

1840

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

2418

2419

@staticmethod

2420

def key_id(certificate):

2421

"Convert a certificate bytestring to a hexdigit key ID"

2422

# New GnuTLS "datum" with the public key

2423

datum = gnutls.datum_t(

2424

ctypes.cast(ctypes.c_char_p(certificate),

2425

ctypes.POINTER(ctypes.c_ubyte)),

2426

ctypes.c_uint(len(certificate)))

2427

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

2428

# New empty GnuTLS certificate

2429

pubkey = gnutls.pubkey_t()

2430

gnutls.pubkey_init(ctypes.byref(pubkey))

2431

# Import the raw public key into the certificate

2432

gnutls.pubkey_import(pubkey,

2433

ctypes.byref(datum),

2434

gnutls.X509_FMT_DER)

2435

# New buffer for the key ID

2436

buf = ctypes.create_string_buffer(32)

2437

buf_len = ctypes.c_size_t(len(buf))

2438

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

2439

gnutls.pubkey_get_key_id(pubkey,

2440

gnutls.KEYID_USE_SHA256,

2441

ctypes.cast(ctypes.byref(buf),

2442

ctypes.POINTER(ctypes.c_ubyte)),

2443

ctypes.byref(buf_len))

2444

# Deinit the certificate

2445

gnutls.pubkey_deinit(pubkey)

2446

2447

# Convert the buffer to a Python bytestring

2448

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

2449

# Convert the bytestring to hexadecimal notation

2450

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

2451

return hex_key_id

2452

1841

2453

1842

@staticmethod

2454

1843

def fingerprint(openpgp):

2455

1844

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2456

1845

# New GnuTLS "datum" with the OpenPGP public key

2457

datum = gnutls.datum_t(

2458

ctypes.cast(ctypes.c_char_p(openpgp),

2459

ctypes.POINTER(ctypes.c_ubyte)),

2460

ctypes.c_uint(len(openpgp)))

1846

datum = (gnutls.library.types

1847

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

1848

ctypes.POINTER

1849

(ctypes.c_ubyte)),

1850

ctypes.c_uint(len(openpgp))))

2461

1851

# New empty GnuTLS certificate

2462

crt = gnutls.openpgp_crt_t()

2463

gnutls.openpgp_crt_init(ctypes.byref(crt))

1852

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1853

(gnutls.library.functions

1854

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2464

1855

# Import the OpenPGP public key into the certificate

2465

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

2466

gnutls.OPENPGP_FMT_RAW)

1856

(gnutls.library.functions

1857

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

1858

gnutls.library.constants

1859

.GNUTLS_OPENPGP_FMT_RAW))

2467

1860

# Verify the self signature in the key

2468

1861

crtverify = ctypes.c_uint()

2469

gnutls.openpgp_crt_verify_self(crt, 0,

2470

ctypes.byref(crtverify))

1862

(gnutls.library.functions

1863

.gnutls_openpgp_crt_verify_self(crt, 0,

1864

ctypes.byref(crtverify)))

2471

1865

if crtverify.value != 0:

2472

gnutls.openpgp_crt_deinit(crt)

2473

raise gnutls.CertificateSecurityError(code

2474

=crtverify.value)

1866

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1867

raise (gnutls.errors.CertificateSecurityError

1868

("Verify failed"))

2475

1869

# New buffer for the fingerprint

2476

1870

buf = ctypes.create_string_buffer(20)

2477

1871

buf_len = ctypes.c_size_t()

2478

1872

# Get the fingerprint from the certificate into the buffer

2479

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

2480

ctypes.byref(buf_len))

1873

(gnutls.library.functions

1874

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

1875

ctypes.byref(buf_len)))

2481

1876

# Deinit the certificate

2482

gnutls.openpgp_crt_deinit(crt)

1877

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2483

1878

# Convert the buffer to a Python bytestring

2484

1879

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

2485

1880

# Convert the bytestring to hexadecimal notation

2489

1884

2490

1885

class MultiprocessingMixIn(object):

2491

1886

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

2492

2493

1887

def sub_process_main(self, request, address):

2494

1888

try:

2495

1889

self.finish_request(request, address)

2496

1890

except Exception:

2497

1891

self.handle_error(request, address)

2498

1892

self.close_request(request)

2499

1893

2500

1894

def process_request(self, request, address):

2501

1895

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

2502

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

2503

args=(request, address))

1896

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

1897

args = (request, address))

2504

1898

proc.start()

2505

1899

return proc

2506

1900

2507

1901

2508

1902

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2509

1903

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

2510

2511

1904

def process_request(self, request, client_address):

2512

1905

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

2513

1906

2514

1907

This function creates a new pipe in self.pipe

2515

1908

"""

2516

1909

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2517

1910

2518

1911

proc = MultiprocessingMixIn.process_request(self, request,

2519

1912

client_address)

2520

1913

self.child_pipe.close()

2521

1914

self.add_pipe(parent_pipe, proc)

2522

1915

2523

1916

def add_pipe(self, parent_pipe, proc):

2524

1917

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

2525

raise NotImplementedError()

1918

raise NotImplementedError

2526

1919

2527

1920

2528

1921

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2529

1922

socketserver.TCPServer, object):

2530

1923

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

2531

1924

2532

1925

Attributes:

2533

1926

enabled: Boolean; whether this server is activated yet

2534

1927

interface: None or a network interface name (string)

2535

1928

use_ipv6: Boolean; to use IPv6 or not

2536

1929

"""

2537

2538

1930

def __init__(self, server_address, RequestHandlerClass,

2539

interface=None,

2540

use_ipv6=True,

2541

socketfd=None):

1931

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

2542

1932

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

2543

1933

creating a new one with socket.socket().

2544

1934

"""

2550

1940

self.socketfd = socketfd

2551

1941

# Save the original socket.socket() function

2552

1942

self.socket_socket = socket.socket

2553

2554

1943

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

2555

#

1944

#

2556

1945

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

2557

1946

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

2558

1947

# patching socket.socket.)

2559

#

1948

#

2560

1949

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

2561

1950

@functools.wraps(socket.socket)

2562

1951

def socket_wrapper(*args, **kwargs):

2574

1963

# socket_wrapper(), if socketfd was set.

2575

1964

socketserver.TCPServer.__init__(self, server_address,

2576

1965

RequestHandlerClass)

2577

1966

2578

1967

def server_bind(self):

2579

1968

"""This overrides the normal server_bind() function

2580

1969

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

2581

1970

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

2582

global SO_BINDTODEVICE

2583

1971

if self.interface is not None:

2584

1972

if SO_BINDTODEVICE is None:

2585

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

2586

# common enough.

2587

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

2588

SO_BINDTODEVICE = 25

2589

try:

2590

self.socket.setsockopt(

2591

socket.SOL_SOCKET, SO_BINDTODEVICE,

2592

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

2593

except socket.error as error:

2594

if error.errno == errno.EPERM:

2595

logger.error("No permission to bind to"

2596

" interface %s", self.interface)

2597

elif error.errno == errno.ENOPROTOOPT:

2598

logger.error("SO_BINDTODEVICE not available;"

2599

" cannot bind to interface %s",

2600

self.interface)

2601

elif error.errno == errno.ENODEV:

2602

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

2603

" cannot bind", self.interface)

2604

else:

2605

raise

1973

logger.error("SO_BINDTODEVICE does not exist;"

1974

" cannot bind to interface %s",

1975

self.interface)

1976

else:

1977

try:

1978

self.socket.setsockopt(socket.SOL_SOCKET,

1979

SO_BINDTODEVICE,

1980

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

1981

except socket.error as error:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1986

logger.error("SO_BINDTODEVICE not available;"

1987

" cannot bind to interface %s",

1988

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

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

1991

" cannot bind", self.interface)

1992

else:

1993

raise

2606

1994

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

2607

1995

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

2608

1996

if not self.server_address[0]:

2609

1997

if self.address_family == socket.AF_INET6:

2610

any_address = "::" # in6addr_any

1998

any_address = "::" # in6addr_any

2611

1999

else:

2612

any_address = "0.0.0.0" # INADDR_ANY

2000

any_address = "0.0.0.0" # INADDR_ANY

2613

2001

self.server_address = (any_address,

2614

2002

self.server_address[1])

2615

2003

elif not self.server_address[1]:

2616

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

2004

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

2005

0)

2617

2006

# if self.interface:

2618

2007

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

2619

2008

# 0, # port

2625

2014

2626

2015

class MandosServer(IPv6_TCPServer):

2627

2016

"""Mandos server.

2628

2017

2629

2018

Attributes:

2630

2019

clients: set of Client objects

2631

2020

gnutls_priority GnuTLS priority string

2632

2021

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

2633

2634

Assumes a GLib.MainLoop event loop.

2022

2023

Assumes a gobject.MainLoop event loop.

2635

2024

"""

2636

2637

2025

def __init__(self, server_address, RequestHandlerClass,

2638

interface=None,

2639

use_ipv6=True,

2640

clients=None,

2641

gnutls_priority=None,

2642

use_dbus=True,

2643

socketfd=None):

2026

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

2027

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

2644

2028

self.enabled = False

2645

2029

self.clients = clients

2646

2030

if self.clients is None:

2649

2033

self.gnutls_priority = gnutls_priority

2650

2034

IPv6_TCPServer.__init__(self, server_address,

2651

2035

RequestHandlerClass,

2652

interface=interface,

2653

use_ipv6=use_ipv6,

2654

socketfd=socketfd)

2655

2036

interface = interface,

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

2656

2039

def server_activate(self):

2657

2040

if self.enabled:

2658

2041

return socketserver.TCPServer.server_activate(self)

2659

2042

2660

2043

def enable(self):

2661

2044

self.enabled = True

2662

2045

2663

2046

def add_pipe(self, parent_pipe, proc):

2664

2047

# Call "handle_ipc" for both data and EOF events

2665

GLib.io_add_watch(

2666

parent_pipe.fileno(),

2667

GLib.IO_IN | GLib.IO_HUP,

2668

functools.partial(self.handle_ipc,

2669

parent_pipe=parent_pipe,

2670

proc=proc))

2671

2672

def handle_ipc(self, source, condition,

2673

parent_pipe=None,

2674

proc=None,

2675

client_object=None):

2048

gobject.io_add_watch(parent_pipe.fileno(),

2049

gobject.IO_IN | gobject.IO_HUP,

2050

functools.partial(self.handle_ipc,

2051

parent_pipe =

2052

parent_pipe,

2053

proc = proc))

2054

2055

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

2056

proc = None, client_object=None):

2676

2057

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

2677

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

2058

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

2678

2059

# Wait for other process to exit

2679

2060

proc.join()

2680

2061

return False

2681

2062

2682

2063

# Read a request from the child

2683

2064

request = parent_pipe.recv()

2684

2065

command = request[0]

2685

2066

2686

2067

if command == 'init':

2687

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

2688

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

2689

address = request[3]

2690

2691

for c in self.clients.values():

2692

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2693

continue

2694

if key_id and c.key_id == key_id:

2695

client = c

2696

break

2697

if fpr and c.fingerprint == fpr:

2068

fpr = request[1]

2069

address = request[2]

2070

2071

for c in self.clients.itervalues():

2072

if c.fingerprint == fpr:

2698

2073

client = c

2699

2074

break

2700

2075

else:

2701

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

2702

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

2076

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

2077

"dress: %s", fpr, address)

2703

2078

if self.use_dbus:

2704

2079

# Emit D-Bus signal

2705

mandos_dbus_service.ClientNotFound(key_id or fpr,

2080

mandos_dbus_service.ClientNotFound(fpr,

2706

2081

address[0])

2707

2082

parent_pipe.send(False)

2708

2083

return False

2709

2710

GLib.io_add_watch(

2711

parent_pipe.fileno(),

2712

GLib.IO_IN | GLib.IO_HUP,

2713

functools.partial(self.handle_ipc,

2714

parent_pipe=parent_pipe,

2715

proc=proc,

2716

client_object=client))

2084

2085

gobject.io_add_watch(parent_pipe.fileno(),

2086

gobject.IO_IN | gobject.IO_HUP,

2087

functools.partial(self.handle_ipc,

2088

parent_pipe =

2089

parent_pipe,

2090

proc = proc,

2091

client_object =

2092

client))

2717

2093

parent_pipe.send(True)

2718

2094

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

2719

2095

# same fileno

2722

2098

funcname = request[1]

2723

2099

args = request[2]

2724

2100

kwargs = request[3]

2725

2101

2726

2102

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

2727

2103

funcname)(*args,

2728

**kwargs)))

2729

2104

**kwargs)))

2105

2730

2106

if command == 'getattr':

2731

2107

attrname = request[1]

2732

if isinstance(client_object.__getattribute__(attrname),

2733

collections.Callable):

2734

parent_pipe.send(('function', ))

2108

if callable(client_object.__getattribute__(attrname)):

2109

parent_pipe.send(('function',))

2735

2110

else:

2736

parent_pipe.send((

2737

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

2738

2111

parent_pipe.send(('data', client_object

2112

.__getattribute__(attrname)))

2113

2739

2114

if command == 'setattr':

2740

2115

attrname = request[1]

2741

2116

value = request[2]

2742

2117

setattr(client_object, attrname, value)

2743

2118

2744

2119

return True

2745

2120

2746

2121

2747

2122

def rfc3339_duration_to_delta(duration):

2748

2123

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

2749

2124

2750

2125

>>> rfc3339_duration_to_delta("P7D")

2751

2126

datetime.timedelta(7)

2752

2127

>>> rfc3339_duration_to_delta("PT60S")

2762

2137

>>> rfc3339_duration_to_delta("P1DT3M20S")

2763

2138

datetime.timedelta(1, 200)

2764

2139

"""

2765

2140

2766

2141

# Parsing an RFC 3339 duration with regular expressions is not

2767

2142

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

2768

2143

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

2769

2144

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

2770

2145

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

2771

2146

# avoid excessive use of external libraries.

2772

2147

2773

2148

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

2774

Token = collections.namedtuple("Token", (

2775

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

2776

# a "group" containing digits

2777

"value", # datetime.timedelta or None

2778

"followers")) # Tokens valid after this token

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2779

2158

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

2780

2159

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

2781

2160

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

2782

2161

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

2783

2162

datetime.timedelta(seconds=1),

2784

frozenset((token_end, )))

2163

frozenset((token_end,)))

2785

2164

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

2786

2165

datetime.timedelta(minutes=1),

2787

2166

frozenset((token_second, token_end)))

2803

2182

frozenset((token_month, token_end)))

2804

2183

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

2805

2184

datetime.timedelta(weeks=1),

2806

frozenset((token_end, )))

2185

frozenset((token_end,)))

2807

2186

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

2808

2187

frozenset((token_year, token_month,

2809

2188

token_day, token_time,

2810

token_week)))

2811

# Define starting values:

2812

# Value so far

2813

value = datetime.timedelta()

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2814

2192

found_token = None

2815

# Following valid tokens

2816

followers = frozenset((token_duration, ))

2817

# String left to parse

2818

s = duration

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2819

2195

# Loop until end token is found

2820

2196

while found_token is not token_end:

2821

2197

# Search for any currently valid tokens

2837

2213

break

2838

2214

else:

2839

2215

# No currently valid tokens were found

2840

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

2841

.format(duration))

2216

raise ValueError("Invalid RFC 3339 duration")

2842

2217

# End token found

2843

2218

return value

2844

2219

2845

2220

2846

2221

def string_to_delta(interval):

2847

2222

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

2848

2223

2849

2224

>>> string_to_delta('7d')

2850

2225

datetime.timedelta(7)

2851

2226

>>> string_to_delta('60s')

2859

2234

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

2860

2235

datetime.timedelta(0, 330)

2861

2236

"""

2862

2237

2863

2238

try:

2864

2239

return rfc3339_duration_to_delta(interval)

2865

2240

except ValueError:

2866

2241

pass

2867

2242

2868

2243

timevalue = datetime.timedelta(0)

2869

2244

for s in interval.split():

2870

2245

try:

2871

suffix = s[-1]

2246

suffix = unicode(s[-1])

2872

2247

value = int(s[:-1])

2873

2248

if suffix == "d":

2874

2249

delta = datetime.timedelta(value)

2881

2256

elif suffix == "w":

2882

2257

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

2883

2258

else:

2884

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

2885

except IndexError as e:

2259

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

2260

.format(suffix))

2261

except (ValueError, IndexError) as e:

2886

2262

raise ValueError(*(e.args))

2887

2263

timevalue += delta

2888

2264

return timevalue

2889

2265

2890

2266

2891

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

2267

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

2892

2268

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

2893

2269

2894

2270

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

2895

2271

if os.fork():

2896

2272

sys.exit()

2904

2280

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

2905

2281

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

2906

2282

raise OSError(errno.ENODEV,

2907

"{} not a character device"

2283

"{0} not a character device"

2908

2284

.format(os.devnull))

2909

2285

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

2910

2286

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

2914

2290

2915

2291

2916

2292

def main():

2917

2293

2918

2294

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

2919

2295

# Parsing of options, both command line and config file

2920

2296

2921

2297

parser = argparse.ArgumentParser()

2922

2298

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

2923

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

2299

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

2924

2300

help="show version number and exit")

2925

2301

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

2926

2302

help="Bind to interface IF")

2959

2335

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

2960

2336

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

2961

2337

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

2962

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

2963

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

2964

default=None)

2965

2338

2966

2339

options = parser.parse_args()

2967

2340

2968

2341

if options.check:

2969

2342

import doctest

2970

fail_count, test_count = doctest.testmod()

2971

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

2972

2343

doctest.testmod()

2344

sys.exit()

2345

2973

2346

# Default values for config file for server-global settings

2974

if gnutls.has_rawpk:

2975

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

2976

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

2977

else:

2978

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

2979

":+SIGN-DSA-SHA256")

2980

server_defaults = {"interface": "",

2981

"address": "",

2982

"port": "",

2983

"debug": "False",

2984

"priority": priority,

2985

"servicename": "Mandos",

2986

"use_dbus": "True",

2987

"use_ipv6": "True",

2988

"debuglevel": "",

2989

"restore": "True",

2990

"socket": "",

2991

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

2992

"foreground": "False",

2993

"zeroconf": "True",

2994

}

2995

del priority

2996

2347

server_defaults = { "interface": "",

2348

"address": "",

2349

"port": "",

2350

"debug": "False",

2351

"priority":

2352

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

2353

"servicename": "Mandos",

2354

"use_dbus": "True",

2355

"use_ipv6": "True",

2356

"debuglevel": "",

2357

"restore": "True",

2358

"socket": "",

2359

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

2360

"foreground": "False",

2361

}

2362

2997

2363

# Parse config file for server-global settings

2998

2364

server_config = configparser.SafeConfigParser(server_defaults)

2999

2365

del server_defaults

3000

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

2366

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

2367

"mandos.conf"))

3001

2368

# Convert the SafeConfigParser object to a dict

3002

2369

server_settings = server_config.defaults()

3003

2370

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

3004

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

3005

"foreground", "zeroconf"):

2371

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

3006

2372

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

3007

2373

option)

3008

2374

if server_settings["port"]:

3018

2384

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

3019

2385

["socket"])

3020

2386

del server_config

3021

2387

3022

2388

# Override the settings from the config file with command line

3023

2389

# options, if set.

3024

2390

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

3025

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

3026

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

3027

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

2391

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

2392

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

2393

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

3028

2394

value = getattr(options, option)

3029

2395

if value is not None:

3030

2396

server_settings[option] = value

3031

2397

del options

3032

2398

# Force all strings to be unicode

3033

2399

for option in server_settings.keys():

3034

if isinstance(server_settings[option], bytes):

3035

server_settings[option] = (server_settings[option]

3036

.decode("utf-8"))

2400

if type(server_settings[option]) is str:

2401

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

3037

2402

# Force all boolean options to be boolean

3038

2403

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

3039

"foreground", "zeroconf"):

2404

"foreground"):

3040

2405

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

3041

2406

# Debug implies foreground

3042

2407

if server_settings["debug"]:

3043

2408

server_settings["foreground"] = True

3044

2409

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

3045

2410

3046

2411

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

3047

3048

if (not server_settings["zeroconf"]

3049

and not (server_settings["port"]

3050

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

3051

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

3052

2412

3053

2413

# For convenience

3054

2414

debug = server_settings["debug"]

3055

2415

debuglevel = server_settings["debuglevel"]

3058

2418

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

3059

2419

stored_state_file)

3060

2420

foreground = server_settings["foreground"]

3061

zeroconf = server_settings["zeroconf"]

3062

2421

3063

2422

if debug:

3064

2423

initlogger(debug, logging.DEBUG)

3065

2424

else:

3068

2427

else:

3069

2428

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

3070

2429

initlogger(debug, level)

3071

2430

3072

2431

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

3073

syslogger.setFormatter(

3074

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

3075

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

3076

server_settings["servicename"])))

3077

2432

syslogger.setFormatter(logging.Formatter

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

2437

3078

2438

# Parse config file with clients

3079

2439

client_config = configparser.SafeConfigParser(Client

3080

2440

.client_defaults)

3081

2441

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

3082

2442

"clients.conf"))

3083

2443

3084

2444

global mandos_dbus_service

3085

2445

mandos_dbus_service = None

3086

3087

socketfd = None

3088

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

3089

socketfd = server_settings["socket"]

3090

tcp_server = MandosServer(

3091

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

3092

ClientHandler,

3093

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

3094

use_ipv6=use_ipv6,

3095

gnutls_priority=server_settings["priority"],

3096

use_dbus=use_dbus,

3097

socketfd=socketfd)

2446

2447

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

2448

server_settings["port"]),

2449

ClientHandler,

2450

interface=(server_settings["interface"]

2451

or None),

2452

use_ipv6=use_ipv6,

2453

gnutls_priority=

2454

server_settings["priority"],

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

3098

2458

if not foreground:

3099

2459

pidfilename = "/run/mandos.pid"

3100

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

3101

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

3102

2460

pidfile = None

3103

2461

try:

3104

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

2462

pidfile = open(pidfilename, "w")

3105

2463

except IOError as e:

3106

2464

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

3107

2465

exc_info=e)

3108

3109

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

3110

("mandos", "mandos"),

3111

("nobody", "nogroup")):

2466

2467

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

3112

2468

try:

3113

2469

uid = pwd.getpwnam(name).pw_uid

3114

gid = pwd.getpwnam(group).pw_gid

2470

gid = pwd.getpwnam(name).pw_gid

3115

2471

break

3116

2472

except KeyError:

3117

2473

continue

3121

2477

try:

3122

2478

os.setgid(gid)

3123

2479

os.setuid(uid)

3124

if debug:

3125

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

3126

gid))

3127

2480

except OSError as error:

3128

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

3129

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

3130

2481

if error.errno != errno.EPERM:

3131

raise

3132

2482

raise error

2483

3133

2484

if debug:

3134

2485

# Enable all possible GnuTLS debugging

3135

2486

3136

2487

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

3137

2488

# - GnuTLS manual

3138

gnutls.global_set_log_level(11)

3139

3140

@gnutls.log_func

2489

gnutls.library.functions.gnutls_global_set_log_level(11)

2490

2491

@gnutls.library.types.gnutls_log_func

3141

2492

def debug_gnutls(level, string):

3142

2493

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

3143

3144

gnutls.global_set_log_function(debug_gnutls)

3145

2494

2495

(gnutls.library.functions

2496

.gnutls_global_set_log_function(debug_gnutls))

2497

3146

2498

# Redirect stdin so all checkers get /dev/null

3147

2499

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

3148

2500

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

3149

2501

if null > 2:

3150

2502

os.close(null)

3151

2503

3152

2504

# Need to fork before connecting to D-Bus

3153

2505

if not foreground:

3154

2506

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

3155

2507

daemon()

3156

3157

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

3158

# to inform GLib that threads will be used.

3159

GLib.threads_init()

3160

2508

2509

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

2510

# need to inform gobject that threads will be used.

2511

gobject.threads_init()

2512

3161

2513

global main_loop

3162

2514

# From the Avahi example code

3163

2515

DBusGMainLoop(set_as_default=True)

3164

main_loop = GLib.MainLoop()

2516

main_loop = gobject.MainLoop()

3165

2517

bus = dbus.SystemBus()

3166

2518

# End of Avahi example code

3167

2519

if use_dbus:

3168

2520

try:

3169

2521

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

3170

bus,

3171

do_not_queue=True)

3172

old_bus_name = dbus.service.BusName(

3173

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

3174

do_not_queue=True)

3175

except dbus.exceptions.DBusException as e:

2522

bus, do_not_queue=True)

2523

old_bus_name = (dbus.service.BusName

2524

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

2525

do_not_queue=True))

2526

except dbus.exceptions.NameExistsException as e:

3176

2527

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

3177

2528

use_dbus = False

3178

2529

server_settings["use_dbus"] = False

3179

2530

tcp_server.use_dbus = False

3180

if zeroconf:

3181

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3182

service = AvahiServiceToSyslog(

3183

name=server_settings["servicename"],

3184

servicetype="_mandos._tcp",

3185

protocol=protocol,

3186

bus=bus)

3187

if server_settings["interface"]:

3188

service.interface = if_nametoindex(

3189

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

3190

2531

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2532

service = AvahiServiceToSyslog(name =

2533

server_settings["servicename"],

2534

servicetype = "_mandos._tcp",

2535

protocol = protocol, bus = bus)

2536

if server_settings["interface"]:

2537

service.interface = (if_nametoindex

2538

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

2539

3191

2540

global multiprocessing_manager

3192

2541

multiprocessing_manager = multiprocessing.Manager()

3193

2542

3194

2543

client_class = Client

3195

2544

if use_dbus:

3196

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

3197

2545

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

2546

3198

2547

client_settings = Client.config_parser(client_config)

3199

2548

old_client_settings = {}

3200

2549

clients_data = {}

3201

2550

3202

2551

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

3203

2552

global wnull

3204

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

2553

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

3205

2554

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

3206

2555

# mode

3207

2556

if debug or not foreground:

3208

2557

wnull.close()

3209

2558

3210

2559

# Get client data and settings from last running state.

3211

2560

if server_settings["restore"]:

3212

2561

try:

3213

2562

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

3214

if sys.version_info.major == 2:

3215

clients_data, old_client_settings = pickle.load(

3216

stored_state)

3217

else:

3218

bytes_clients_data, bytes_old_client_settings = (

3219

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

3220

# Fix bytes to strings

3221

# clients_data

3222

# .keys()

3223

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

3224

if isinstance(key, bytes)

3225

else key): value

3226

for key, value in

3227

bytes_clients_data.items()}

3228

del bytes_clients_data

3229

for key in clients_data:

3230

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

3231

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

3232

for k, v in

3233

clients_data[key].items()}

3234

clients_data[key] = value

3235

# .client_structure

3236

value["client_structure"] = [

3237

(s.decode("utf-8")

3238

if isinstance(s, bytes)

3239

else s) for s in

3240

value["client_structure"]]

3241

# .name & .host

3242

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

3243

if isinstance(value[k], bytes):

3244

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

3245

if not value.has_key("key_id"):

3246

value["key_id"] = ""

3247

elif not value.has_key("fingerprint"):

3248

value["fingerprint"] = ""

3249

# old_client_settings

3250

# .keys()

3251

old_client_settings = {

3252

(key.decode("utf-8")

3253

if isinstance(key, bytes)

3254

else key): value

3255

for key, value in

3256

bytes_old_client_settings.items()}

3257

del bytes_old_client_settings

3258

# .host

3259

for value in old_client_settings.values():

3260

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

3261

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

3262

.decode("utf-8"))

2563

clients_data, old_client_settings = (pickle.load

2564

(stored_state))

3263

2565

os.remove(stored_state_path)

3264

2566

except IOError as e:

3265

2567

if e.errno == errno.ENOENT:

3266

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

3267

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

2568

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

2569

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

3268

2570

else:

3269

2571

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

3270

2572

exc_info=e)

3271

2573

raise

3272

2574

except EOFError as e:

3273

2575

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

3274

"EOFError:",

3275

exc_info=e)

3276

2576

"EOFError:", exc_info=e)

2577

3277

2578

with PGPEngine() as pgp:

3278

for client_name, client in clients_data.items():

2579

for client_name, client in clients_data.iteritems():

3279

2580

# Skip removed clients

3280

2581

if client_name not in client_settings:

3281

2582

continue

3282

2583

3283

2584

# Decide which value to use after restoring saved state.

3284

2585

# We have three different values: Old config file,

3285

2586

# new config file, and saved state.

3290

2591

# For each value in new config, check if it

3291

2592

# differs from the old config value (Except for

3292

2593

# the "secret" attribute)

3293

if (name != "secret"

3294

and (value !=

3295

old_client_settings[client_name][name])):

2594

if (name != "secret" and

2595

value != old_client_settings[client_name]

2596

[name]):

3296

2597

client[name] = value

3297

2598

except KeyError:

3298

2599

pass

3299

2600

3300

2601

# Clients who has passed its expire date can still be

3301

# enabled if its last checker was successful. A Client

2602

# enabled if its last checker was successful. Clients

3302

2603

# whose checker succeeded before we stored its state is

3303

2604

# assumed to have successfully run all checkers during

3304

2605

# downtime.

3306

2607

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

3307

2608

if not client["last_checked_ok"]:

3308

2609

logger.warning(

3309

"disabling client {} - Client never "

3310

"performed a successful checker".format(

3311

client_name))

2610

"disabling client {0} - Client never "

2611

"performed a successful checker"

2612

.format(client_name))

3312

2613

client["enabled"] = False

3313

2614

elif client["last_checker_status"] != 0:

3314

2615

logger.warning(

3315

"disabling client {} - Client last"

3316

" checker failed with error code"

3317

" {}".format(

3318

client_name,

3319

client["last_checker_status"]))

2616

"disabling client {0} - Client "

2617

"last checker failed with error code {1}"

2618

.format(client_name,

2619

client["last_checker_status"]))

3320

2620

client["enabled"] = False

3321

2621

else:

3322

client["expires"] = (

3323

datetime.datetime.utcnow()

3324

+ client["timeout"])

2622

client["expires"] = (datetime.datetime

2623

.utcnow()

2624

+ client["timeout"])

3325

2625

logger.debug("Last checker succeeded,"

3326

" keeping {} enabled".format(

3327

client_name))

2626

" keeping {0} enabled"

2627

.format(client_name))

3328

2628

try:

3329

client["secret"] = pgp.decrypt(

3330

client["encrypted_secret"],

3331

client_settings[client_name]["secret"])

2629

client["secret"] = (

2630

pgp.decrypt(client["encrypted_secret"],

2631

client_settings[client_name]

2632

["secret"]))

3332

2633

except PGPError:

3333

2634

# If decryption fails, we use secret from new settings

3334

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

3335

client_name))

3336

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

3337

["secret"])

3338

2635

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

2636

.format(client_name))

2637

client["secret"] = (

2638

client_settings[client_name]["secret"])

2639

3339

2640

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

3340

2641

for client_name in (set(old_client_settings)

3341

2642

- set(client_settings)):

3343

2644

for client_name in (set(client_settings)

3344

2645

- set(old_client_settings)):

3345

2646

clients_data[client_name] = client_settings[client_name]

3346

2647

3347

2648

# Create all client objects

3348

for client_name, client in clients_data.items():

2649

for client_name, client in clients_data.iteritems():

3349

2650

tcp_server.clients[client_name] = client_class(

3350

name=client_name,

3351

settings=client,

3352

server_settings=server_settings)

3353

2651

name = client_name, settings = client,

2652

server_settings = server_settings)

2653

3354

2654

if not tcp_server.clients:

3355

2655

logger.warning("No clients defined")

3356

2656

3357

2657

if not foreground:

3358

2658

if pidfile is not None:

3359

pid = os.getpid()

3360

2659

try:

3361

2660

with pidfile:

3362

print(pid, file=pidfile)

2661

pid = os.getpid()

2662

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

3363

2663

except IOError:

3364

2664

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

3365

2665

pidfilename, pid)

3366

2666

del pidfile

3367

2667

del pidfilename

3368

3369

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

3370

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3371

lambda: main_loop.quit() and False)

3372

2668

2669

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

2670

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

2671

3373

2672

if use_dbus:

3374

3375

@alternate_dbus_interfaces(

3376

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

3377

class MandosDBusService(DBusObjectWithObjectManager):

2673

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

2674

"se.bsnet.fukt.Mandos"})

2675

class MandosDBusService(DBusObjectWithProperties):

3378

2676

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

3379

3380

2677

def __init__(self):

3381

2678

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

3382

3383

2679

_interface = "se.recompile.Mandos"

3384

2680

2681

@dbus_interface_annotations(_interface)

2682

def _foo(self):

2683

return { "org.freedesktop.DBus.Property"

2684

".EmitsChangedSignal":

2685

"false"}

2686

3385

2687

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

3386

2688

def ClientAdded(self, objpath):

3387

2689

"D-Bus signal"

3388

2690

pass

3389

2691

3390

2692

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

3391

def ClientNotFound(self, key_id, address):

2693

def ClientNotFound(self, fingerprint, address):

3392

2694

"D-Bus signal"

3393

2695

pass

3394

3395

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

3396

"true"})

2696

3397

2697

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

3398

2698

def ClientRemoved(self, objpath, name):

3399

2699

"D-Bus signal"

3400

2700

pass

3401

3402

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

3403

"true"})

2701

3404

2702

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

3405

2703

def GetAllClients(self):

3406

2704

"D-Bus method"

3407

return dbus.Array(c.dbus_object_path for c in

3408

tcp_server.clients.values())

3409

3410

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

3411

"true"})

2705

return dbus.Array(c.dbus_object_path

2706

for c in

2707

tcp_server.clients.itervalues())

2708

3412

2709

@dbus.service.method(_interface,

3413

2710

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

3414

2711

def GetAllClientsWithProperties(self):

3415

2712

"D-Bus method"

3416

2713

return dbus.Dictionary(

3417

{c.dbus_object_path: c.GetAll(

3418

"se.recompile.Mandos.Client")

3419

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

2714

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

2715

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

3420

2716

signature="oa{sv}")

3421

2717

3422

2718

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

3423

2719

def RemoveClient(self, object_path):

3424

2720

"D-Bus method"

3425

for c in tcp_server.clients.values():

2721

for c in tcp_server.clients.itervalues():

3426

2722

if c.dbus_object_path == object_path:

3427

2723

del tcp_server.clients[c.name]

3428

2724

c.remove_from_connection()

3429

# Don't signal the disabling

2725

# Don't signal anything except ClientRemoved

3430

2726

c.disable(quiet=True)

3431

# Emit D-Bus signal for removal

3432

self.client_removed_signal(c)

2727

# Emit D-Bus signal

2728

self.ClientRemoved(object_path, c.name)

3433

2729

return

3434

2730

raise KeyError(object_path)

3435

2731

3436

2732

del _interface

3437

3438

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3439

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

3440

def GetManagedObjects(self):

3441

"""D-Bus method"""

3442

return dbus.Dictionary(

3443

{client.dbus_object_path:

3444

dbus.Dictionary(

3445

{interface: client.GetAll(interface)

3446

for interface in

3447

client._get_all_interface_names()})

3448

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

3449

3450

def client_added_signal(self, client):

3451

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

3452

if use_dbus:

3453

# New standard signal

3454

self.InterfacesAdded(

3455

client.dbus_object_path,

3456

dbus.Dictionary(

3457

{interface: client.GetAll(interface)

3458

for interface in

3459

client._get_all_interface_names()}))

3460

# Old signal

3461

self.ClientAdded(client.dbus_object_path)

3462

3463

def client_removed_signal(self, client):

3464

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

3465

if use_dbus:

3466

# New standard signal

3467

self.InterfacesRemoved(

3468

client.dbus_object_path,

3469

client._get_all_interface_names())

3470

# Old signal

3471

self.ClientRemoved(client.dbus_object_path,

3472

client.name)

3473

2733

3474

2734

mandos_dbus_service = MandosDBusService()

3475

3476

# Save modules to variables to exempt the modules from being

3477

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

3478

mp = multiprocessing

3479

wn = wnull

3480

2735

3481

2736

def cleanup():

3482

2737

"Cleanup function; run on exit"

3483

if zeroconf:

3484

service.cleanup()

3485

3486

mp.active_children()

3487

wn.close()

2738

service.cleanup()

2739

2740

multiprocessing.active_children()

2741

wnull.close()

3488

2742

if not (tcp_server.clients or client_settings):

3489

2743

return

3490

2744

3491

2745

# Store client before exiting. Secrets are encrypted with key

3492

2746

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

3493

2747

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

3494

2748

clients = {}

3495

2749

with PGPEngine() as pgp:

3496

for client in tcp_server.clients.values():

2750

for client in tcp_server.clients.itervalues():

3497

2751

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

3498

2752

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

3499

2753

key)

3500

2754

client_dict = {}

3501

2755

3502

2756

# A list of attributes that can not be pickled

3503

2757

# + secret.

3504

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

3505

"checker", "server_settings"}

3506

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

3507

.Object):

2758

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

2759

"checker", "server_settings"))

2760

for name, typ in (inspect.getmembers

2761

(dbus.service.Object)):

3508

2762

exclude.add(name)

3509

2763

3510

2764

client_dict["encrypted_secret"] = (client

3511

2765

.encrypted_secret)

3512

2766

for attr in client.client_structure:

3513

2767

if attr not in exclude:

3514

2768

client_dict[attr] = getattr(client, attr)

3515

2769

3516

2770

clients[client.name] = client_dict

3517

2771

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

3518

2772

3519

2773

try:

3520

with tempfile.NamedTemporaryFile(

3521

mode='wb',

3522

suffix=".pickle",

3523

prefix='clients-',

3524

dir=os.path.dirname(stored_state_path),

3525

delete=False) as stored_state:

3526

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

3527

protocol=2)

3528

tempname = stored_state.name

2774

with (tempfile.NamedTemporaryFile

2775

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

2776

dir=os.path.dirname(stored_state_path),

2777

delete=False)) as stored_state:

2778

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

2779

tempname=stored_state.name

3529

2780

os.rename(tempname, stored_state_path)

3530

2781

except (IOError, OSError) as e:

3531

2782

if not debug:

3534

2785

except NameError:

3535

2786

pass

3536

2787

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

3537

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

2788

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

3538

2789

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

3539

2790

else:

3540

2791

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

3541

2792

exc_info=e)

3542

raise

3543

2793

raise e

2794

3544

2795

# Delete all clients, and settings from config

3545

2796

while tcp_server.clients:

3546

2797

name, client = tcp_server.clients.popitem()

3547

2798

if use_dbus:

3548

2799

client.remove_from_connection()

3549

# Don't signal the disabling

2800

# Don't signal anything except ClientRemoved

3550

2801

client.disable(quiet=True)

3551

# Emit D-Bus signal for removal

3552

2802

if use_dbus:

3553

mandos_dbus_service.client_removed_signal(client)

2803

# Emit D-Bus signal

2804

mandos_dbus_service.ClientRemoved(client

2805

.dbus_object_path,

2806

client.name)

3554

2807

client_settings.clear()

3555

2808

3556

2809

atexit.register(cleanup)

3557

3558

for client in tcp_server.clients.values():

2810

2811

for client in tcp_server.clients.itervalues():

3559

2812

if use_dbus:

3560

# Emit D-Bus signal for adding

3561

mandos_dbus_service.client_added_signal(client)

2813

# Emit D-Bus signal

2814

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3562

2815

# Need to initiate checking of clients

3563

2816

if client.enabled:

3564

2817

client.init_checker()

3565

2818

3566

2819

tcp_server.enable()

3567

2820

tcp_server.server_activate()

3568

2821

3569

2822

# Find out what port we got

3570

if zeroconf:

3571

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

2823

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

3572

2824

if use_ipv6:

3573

2825

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

3574

2826

" flowinfo %d, scope_id %d",

3576

2828

else: # IPv4

3577

2829

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

3578

2830

*tcp_server.socket.getsockname())

3579

3580

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

3581

2831

2832

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

2833

3582

2834

try:

3583

if zeroconf:

3584

# From the Avahi example code

3585

try:

3586

service.activate()

3587

except dbus.exceptions.DBusException as error:

3588

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

3589

cleanup()

3590

sys.exit(1)

3591

# End of Avahi example code

3592

3593

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

3594

lambda *args, **kwargs:

3595

(tcp_server.handle_request

3596

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

3597

2835

# From the Avahi example code

2836

try:

2837

service.activate()

2838

except dbus.exceptions.DBusException as error:

2839

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

2840

cleanup()

2841

sys.exit(1)

2842

# End of Avahi example code

2843

2844

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

2845

lambda *args, **kwargs:

2846

(tcp_server.handle_request

2847

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

2848

3598

2849

logger.debug("Starting main loop")

3599

2850

main_loop.run()

3600

2851

except AvahiError as error:

3609

2860

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

3610

2861

cleanup()

3611

2862

3612

3613

2863

if __name__ == '__main__':

3614

2864

main()