/mandos/trunk : revision 905

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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#

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

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

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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import SocketServer as socketserver

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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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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.4.1"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.15"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet',

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'--no-use-agent'])

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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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'--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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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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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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return b"mandos" + binascii.hexlify(password)

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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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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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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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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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin'] ) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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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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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

301

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class AvahiError(Exception):

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

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self.value = value

215

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

216

def __unicode__(self):

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return unicode(repr(self.value))

306

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

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**kwargs)

308

218

309

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class AvahiServiceError(AvahiError):

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pass

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313

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class AvahiGroupError(AvahiError):

223

315

pass

224

316

225

317

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class AvahiService(object):

227

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"""An Avahi (Zeroconf) service.

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320

229

321

Attributes:

230

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

231

323

Used to optionally bind to the specified interface.

232

324

name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

234

See <http://www.dns-sd.org/ServiceTypes.html>

326

See <https://www.iana.org/assignments/service-names-port-numbers>

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port: integer; what port to announce

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328

TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

243

335

server: D-Bus Server

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bus: dbus.SystemBus()

245

337

"""

246

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

247

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

248

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

338

339

def __init__(self,

340

interface=avahi.IF_UNSPEC,

341

name=None,

342

servicetype=None,

343

port=None,

344

TXT=None,

345

domain="",

346

host="",

347

max_renames=32768,

348

protocol=avahi.PROTO_UNSPEC,

349

bus=None):

250

350

self.interface = interface

251

351

self.name = name

252

352

self.type = servicetype

261

361

self.server = None

262

362

self.bus = bus

263

363

self.entry_group_state_changed_match = None

264

def rename(self):

364

365

def rename(self, remove=True):

265

366

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

266

367

if self.rename_count >= self.max_renames:

267

368

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

268

369

" after %i retries, exiting.",

269

370

self.rename_count)

270

371

raise AvahiServiceError("Too many renames")

271

self.name = unicode(self.server

272

.GetAlternativeServiceName(self.name))

372

self.name = str(

373

self.server.GetAlternativeServiceName(self.name))

374

self.rename_count += 1

273

375

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

274

376

self.name)

275

self.remove()

377

if remove:

378

self.remove()

276

379

try:

277

380

self.add()

278

381

except dbus.exceptions.DBusException as error:

279

logger.critical("DBusException: %s", error)

280

self.cleanup()

281

os._exit(1)

282

self.rename_count += 1

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

283

391

def remove(self):

284

392

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

285

393

if self.entry_group_state_changed_match is not None:

287

395

self.entry_group_state_changed_match = None

288

396

if self.group is not None:

289

397

self.group.Reset()

398

290

399

def add(self):

291

400

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

292

401

self.remove()

309

418

dbus.UInt16(self.port),

310

419

avahi.string_array_to_txt_array(self.TXT))

311

420

self.group.Commit()

421

312

422

def entry_group_state_changed(self, state, error):

313

423

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

314

424

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

315

425

316

426

if state == avahi.ENTRY_GROUP_ESTABLISHED:

317

427

logger.debug("Zeroconf service established.")

318

428

elif state == avahi.ENTRY_GROUP_COLLISION:

320

430

self.rename()

321

431

elif state == avahi.ENTRY_GROUP_FAILURE:

322

432

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

323

unicode(error))

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

433

str(error))

434

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

435

326

436

def cleanup(self):

327

437

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

328

438

if self.group is not None:

333

443

pass

334

444

self.group = None

335

445

self.remove()

446

336

447

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

337

448

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

338

449

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

339

bad_states = { avahi.SERVER_INVALID:

340

"Zeroconf server invalid",

341

avahi.SERVER_REGISTERING: None,

342

avahi.SERVER_COLLISION:

343

"Zeroconf server name collision",

344

avahi.SERVER_FAILURE:

345

"Zeroconf server failure" }

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

346

456

if state in bad_states:

347

457

if bad_states[state] is not None:

348

458

if error is None:

351

461

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

352

462

self.cleanup()

353

463

elif state == avahi.SERVER_RUNNING:

354

self.add()

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

355

476

else:

356

477

if error is None:

357

478

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

358

479

else:

359

480

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

481

360

482

def activate(self):

361

483

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

362

484

if self.server is None:

366

488

follow_name_owner_changes=True),

367

489

avahi.DBUS_INTERFACE_SERVER)

368

490

self.server.connect_to_signal("StateChanged",

369

self.server_state_changed)

491

self.server_state_changed)

370

492

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

371

493

494

372

495

class AvahiServiceToSyslog(AvahiService):

373

def rename(self):

496

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

374

497

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

375

ret = AvahiService.rename(self)

376

syslogger.setFormatter(logging.Formatter

377

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

378

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

379

% self.name))

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

380

502

return ret

381

503

382

def timedelta_to_milliseconds(td):

383

"Convert a datetime.timedelta() to milliseconds"

384

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

385

+ (td.seconds * 1000)

386

+ (td.microseconds // 1000))

387

504

505

# Pretend that we have a GnuTLS module

506

class GnuTLS(object):

507

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

508

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

509

510

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

511

if library is None:

512

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

513

_library = ctypes.cdll.LoadLibrary(library)

514

del library

515

_need_version = b"3.3.0"

516

517

def __init__(self):

518

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

519

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

520

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

521

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

522

.format(self._need_version))

523

524

# Unless otherwise indicated, the constants and types below are

525

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

526

527

# Constants

528

E_SUCCESS = 0

529

E_INTERRUPTED = -52

530

E_AGAIN = -28

531

CRT_OPENPGP = 2

532

CLIENT = 2

533

SHUT_RDWR = 0

534

CRD_CERTIFICATE = 1

535

E_NO_CERTIFICATE_FOUND = -49

536

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

537

538

# Types

539

class session_int(ctypes.Structure):

540

_fields_ = []

541

session_t = ctypes.POINTER(session_int)

542

543

class certificate_credentials_st(ctypes.Structure):

544

_fields_ = []

545

certificate_credentials_t = ctypes.POINTER(

546

certificate_credentials_st)

547

certificate_type_t = ctypes.c_int

548

549

class datum_t(ctypes.Structure):

550

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

551

('size', ctypes.c_uint)]

552

553

class openpgp_crt_int(ctypes.Structure):

554

_fields_ = []

555

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

556

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

557

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

558

credentials_type_t = ctypes.c_int

559

transport_ptr_t = ctypes.c_void_p

560

close_request_t = ctypes.c_int

561

562

# Exceptions

563

class Error(Exception):

564

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

565

# exception might be raised from within GnuTLS.__init__,

566

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

567

# global variable has happened.

568

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

569

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

570

# code is passed, convert it to a string with

571

# gnutls.strerror()

572

self.code = code

573

if message is None and code is not None:

574

message = GnuTLS.strerror(code)

575

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

576

message, *args)

577

578

class CertificateSecurityError(Error):

579

pass

580

581

# Classes

582

class Credentials(object):

583

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

587

self.type = gnutls.CRD_CERTIFICATE

588

589

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

591

592

class ClientSession(object):

593

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

594

self._c_object = gnutls.session_t()

595

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

596

gnutls.set_default_priority(self._c_object)

597

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

598

gnutls.handshake_set_private_extensions(self._c_object,

599

True)

600

self.socket = socket

601

if credentials is None:

602

credentials = gnutls.Credentials()

603

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

604

ctypes.cast(credentials._c_object,

605

ctypes.c_void_p))

606

self.credentials = credentials

607

608

def __del__(self):

609

gnutls.deinit(self._c_object)

610

611

def handshake(self):

612

return gnutls.handshake(self._c_object)

613

614

def send(self, data):

615

data = bytes(data)

616

data_len = len(data)

617

while data_len > 0:

618

data_len -= gnutls.record_send(self._c_object,

619

data[-data_len:],

620

data_len)

621

622

def bye(self):

623

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

624

625

# Error handling functions

626

def _error_code(result):

627

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

628

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

629

if result >= 0:

630

return result

631

if result == gnutls.E_NO_CERTIFICATE_FOUND:

632

raise gnutls.CertificateSecurityError(code=result)

633

raise gnutls.Error(code=result)

634

635

def _retry_on_error(result, func, arguments):

636

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

637

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

638

while result < 0:

639

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

640

return _error_code(result)

641

result = func(*arguments)

642

return result

643

644

# Unless otherwise indicated, the function declarations below are

645

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

646

647

# Functions

648

priority_set_direct = _library.gnutls_priority_set_direct

649

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

650

ctypes.POINTER(ctypes.c_char_p)]

651

priority_set_direct.restype = _error_code

652

653

init = _library.gnutls_init

654

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

655

init.restype = _error_code

656

657

set_default_priority = _library.gnutls_set_default_priority

658

set_default_priority.argtypes = [session_t]

659

set_default_priority.restype = _error_code

660

661

record_send = _library.gnutls_record_send

662

record_send.argtypes = [session_t, ctypes.c_void_p,

663

ctypes.c_size_t]

664

record_send.restype = ctypes.c_ssize_t

665

record_send.errcheck = _retry_on_error

666

667

certificate_allocate_credentials = (

668

_library.gnutls_certificate_allocate_credentials)

669

certificate_allocate_credentials.argtypes = [

670

ctypes.POINTER(certificate_credentials_t)]

671

certificate_allocate_credentials.restype = _error_code

672

673

certificate_free_credentials = (

674

_library.gnutls_certificate_free_credentials)

675

certificate_free_credentials.argtypes = [

676

certificate_credentials_t]

677

certificate_free_credentials.restype = None

678

679

handshake_set_private_extensions = (

680

_library.gnutls_handshake_set_private_extensions)

681

handshake_set_private_extensions.argtypes = [session_t,

682

ctypes.c_int]

683

handshake_set_private_extensions.restype = None

684

685

credentials_set = _library.gnutls_credentials_set

686

credentials_set.argtypes = [session_t, credentials_type_t,

687

ctypes.c_void_p]

688

credentials_set.restype = _error_code

689

690

strerror = _library.gnutls_strerror

691

strerror.argtypes = [ctypes.c_int]

692

strerror.restype = ctypes.c_char_p

693

694

certificate_type_get = _library.gnutls_certificate_type_get

695

certificate_type_get.argtypes = [session_t]

696

certificate_type_get.restype = _error_code

697

698

certificate_get_peers = _library.gnutls_certificate_get_peers

699

certificate_get_peers.argtypes = [session_t,

700

ctypes.POINTER(ctypes.c_uint)]

701

certificate_get_peers.restype = ctypes.POINTER(datum_t)

702

703

global_set_log_level = _library.gnutls_global_set_log_level

704

global_set_log_level.argtypes = [ctypes.c_int]

705

global_set_log_level.restype = None

706

707

global_set_log_function = _library.gnutls_global_set_log_function

708

global_set_log_function.argtypes = [log_func]

709

global_set_log_function.restype = None

710

711

deinit = _library.gnutls_deinit

712

deinit.argtypes = [session_t]

713

deinit.restype = None

714

715

handshake = _library.gnutls_handshake

716

handshake.argtypes = [session_t]

717

handshake.restype = _error_code

718

handshake.errcheck = _retry_on_error

719

720

transport_set_ptr = _library.gnutls_transport_set_ptr

721

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

722

transport_set_ptr.restype = None

723

724

bye = _library.gnutls_bye

725

bye.argtypes = [session_t, close_request_t]

726

bye.restype = _error_code

727

bye.errcheck = _retry_on_error

728

729

check_version = _library.gnutls_check_version

730

check_version.argtypes = [ctypes.c_char_p]

731

check_version.restype = ctypes.c_char_p

732

733

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

734

735

openpgp_crt_init = _library.gnutls_openpgp_crt_init

736

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

737

openpgp_crt_init.restype = _error_code

738

739

openpgp_crt_import = _library.gnutls_openpgp_crt_import

740

openpgp_crt_import.argtypes = [openpgp_crt_t,

741

ctypes.POINTER(datum_t),

742

openpgp_crt_fmt_t]

743

openpgp_crt_import.restype = _error_code

744

745

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

746

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

747

ctypes.POINTER(ctypes.c_uint)]

748

openpgp_crt_verify_self.restype = _error_code

749

750

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

751

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

752

openpgp_crt_deinit.restype = None

753

754

openpgp_crt_get_fingerprint = (

755

_library.gnutls_openpgp_crt_get_fingerprint)

756

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

757

ctypes.c_void_p,

758

ctypes.POINTER(

759

ctypes.c_size_t)]

760

openpgp_crt_get_fingerprint.restype = _error_code

761

762

# Remove non-public functions

763

del _error_code, _retry_on_error

764

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

765

gnutls = GnuTLS()

766

767

768

def call_pipe(connection, # : multiprocessing.Connection

769

func, *args, **kwargs):

770

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

771

772

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

773

return value on the provided multiprocessing.Connection.

774

"""

775

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

776

connection.close()

777

778

388

779

class Client(object):

389

780

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

390

781

391

782

Attributes:

392

783

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

393

784

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

395

786

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

396

787

to see if the client lives.

397

788

'None' if no process is running.

398

checker_callback_tag: a gobject event source tag, or None

789

checker_callback_tag: a GLib event source tag, or None

399

790

checker_command: string; External command which is run to check

400

791

if client lives. %() expansions are done at

401

792

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

402

793

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

403

checker_initiator_tag: a gobject event source tag, or None

794

checker_initiator_tag: a GLib event source tag, or None

404

795

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

405

796

client_structure: Object describing what attributes a client has

406

797

and is used for storing the client at exit

407

798

current_checker_command: string; current running checker_command

408

disable_initiator_tag: a gobject event source tag, or None

799

disable_initiator_tag: a GLib event source tag, or None

409

800

enabled: bool()

410

801

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

411

802

uniquely identify the client

415

806

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

416

807

last_checker_status: integer between 0 and 255 reflecting exit

417

808

status of last checker. -1 reflects crashed

418

checker, or None.

809

checker, -2 means no checker completed yet.

810

last_checker_signal: The signal which killed the last checker, if

811

last_checker_status is -1

419

812

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

420

813

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

421

814

D-Bus identifiers

422

815

secret: bytestring; sent verbatim (over TLS) to client

423

816

timeout: datetime.timedelta(); How long from last_checked_ok

424

817

until this client is disabled

425

extended_timeout: extra long timeout when password has been sent

818

extended_timeout: extra long timeout when secret has been sent

426

819

runtime_expansions: Allowed attributes for runtime expansion.

427

820

expires: datetime.datetime(); time (UTC) when a client will be

428

821

disabled, or None

822

server_settings: The server_settings dict from main()

429

823

"""

430

824

431

825

runtime_expansions = ("approval_delay", "approval_duration",

432

"created", "enabled", "fingerprint",

433

"host", "interval", "last_checked_ok",

826

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

827

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

828

"last_approval_request", "last_checked_ok",

434

829

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

435

client_defaults = { "timeout": "5m",

436

"extended_timeout": "15m",

437

"interval": "2m",

438

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

439

"host": "",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

442

"approved_by_default": "True",

443

"enabled": "True",

444

}

445

446

def timeout_milliseconds(self):

447

"Return the 'timeout' attribute in milliseconds"

448

return timedelta_to_milliseconds(self.timeout)

449

450

def extended_timeout_milliseconds(self):

451

"Return the 'extended_timeout' attribute in milliseconds"

452

return timedelta_to_milliseconds(self.extended_timeout)

453

454

def interval_milliseconds(self):

455

"Return the 'interval' attribute in milliseconds"

456

return timedelta_to_milliseconds(self.interval)

457

458

def approval_delay_milliseconds(self):

459

return timedelta_to_milliseconds(self.approval_delay)

830

client_defaults = {

831

"timeout": "PT5M",

832

"extended_timeout": "PT15M",

833

"interval": "PT2M",

834

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

835

"host": "",

836

"approval_delay": "PT0S",

837

"approval_duration": "PT1S",

838

"approved_by_default": "True",

839

"enabled": "True",

840

}

460

841

461

842

@staticmethod

462

843

def config_parser(config):

470

851

for client_name in config.sections():

471

852

section = dict(config.items(client_name))

472

853

client = settings[client_name] = {}

473

854

474

855

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

475

856

# Reformat values from string types to Python types

476

857

client["approved_by_default"] = config.getboolean(

477

858

client_name, "approved_by_default")

478

859

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

479

860

"enabled")

480

861

862

# Uppercase and remove spaces from fingerprint for later

863

# comparison purposes with return value from the

864

# fingerprint() function

481

865

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

482

866

.replace(" ", ""))

483

867

if "secret" in section:

484

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

868

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

869

.encode("utf-8"),

870

"base64")

485

871

elif "secfile" in section:

486

872

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

487

873

(section["secfile"])),

488

874

"rb") as secfile:

489

875

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

490

876

else:

491

raise TypeError("No secret or secfile for section %s"

492

% section)

877

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

878

.format(section))

493

879

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

494

880

client["extended_timeout"] = string_to_delta(

495

881

section["extended_timeout"])

501

887

client["checker_command"] = section["checker"]

502

888

client["last_approval_request"] = None

503

889

client["last_checked_ok"] = None

504

client["last_checker_status"] = None

505

890

client["last_checker_status"] = -2

891

506

892

return settings

507

508

509

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

510

"""Note: the 'checker' key in 'config' sets the

511

'checker_command' attribute and *not* the 'checker'

512

attribute."""

893

894

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

513

895

self.name = name

896

if server_settings is None:

897

server_settings = {}

898

self.server_settings = server_settings

514

899

# adding all client settings

515

for setting, value in settings.iteritems():

900

for setting, value in settings.items():

516

901

setattr(self, setting, value)

517

902

518

903

if self.enabled:

519

904

if not hasattr(self, "last_enabled"):

520

905

self.last_enabled = datetime.datetime.utcnow()

524

909

else:

525

910

self.last_enabled = None

526

911

self.expires = None

527

912

528

913

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

529

# Uppercase and remove spaces from fingerprint for later

530

# comparison purposes with return value from the fingerprint()

531

# function

532

914

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

533

915

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

534

916

datetime.datetime.utcnow())

541

923

self.current_checker_command = None

542

924

self.approved = None

543

925

self.approvals_pending = 0

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

926

self.changedstate = multiprocessing_manager.Condition(

927

multiprocessing_manager.Lock())

928

self.client_structure = [attr

929

for attr in self.__dict__.keys()

549

930

if not attr.startswith("_")]

550

931

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

932

933

for name, t in inspect.getmembers(

934

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

556

935

if not name.startswith("_"):

557

936

self.client_structure.append(name)

558

937

559

938

# Send notice to process children that client state has changed

560

939

def send_changedstate(self):

561

940

with self.changedstate:

562

941

self.changedstate.notify_all()

563

942

564

943

def enable(self):

565

944

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

566

945

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

567

946

# Already enabled

568

947

return

569

self.send_changedstate()

570

948

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

571

949

self.enabled = True

572

950

self.last_enabled = datetime.datetime.utcnow()

573

951

self.init_checker()

574

952

self.send_changedstate()

953

575

954

def disable(self, quiet=True):

576

955

"""Disable this client."""

577

956

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

578

957

return False

579

958

if not quiet:

580

self.send_changedstate()

581

if not quiet:

582

959

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

583

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

584

gobject.source_remove(self.disable_initiator_tag)

960

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

961

GLib.source_remove(self.disable_initiator_tag)

585

962

self.disable_initiator_tag = None

586

963

self.expires = None

587

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

588

gobject.source_remove(self.checker_initiator_tag)

964

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

965

GLib.source_remove(self.checker_initiator_tag)

589

966

self.checker_initiator_tag = None

590

967

self.stop_checker()

591

968

self.enabled = False

592

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

969

if not quiet:

970

self.send_changedstate()

971

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

593

972

return False

594

973

595

974

def __del__(self):

596

975

self.disable()

597

976

598

977

def init_checker(self):

599

978

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

600

979

# and every interval from then on.

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

980

if self.checker_initiator_tag is not None:

981

GLib.source_remove(self.checker_initiator_tag)

982

self.checker_initiator_tag = GLib.timeout_add(

983

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

984

self.start_checker)

604

985

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

986

if self.disable_initiator_tag is not None:

987

GLib.source_remove(self.disable_initiator_tag)

988

self.disable_initiator_tag = GLib.timeout_add(

989

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

608

990

# Also start a new checker *right now*.

609

991

self.start_checker()

610

611

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

992

993

def checker_callback(self, source, condition, connection,

994

command):

612

995

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

613

996

self.checker_callback_tag = None

614

997

self.checker = None

615

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

998

# Read return code from connection (see call_pipe)

999

returncode = connection.recv()

1000

connection.close()

1001

1002

if returncode >= 0:

1003

self.last_checker_status = returncode

1004

self.last_checker_signal = None

617

1005

if self.last_checker_status == 0:

618

1006

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

619

1007

vars(self))

620

1008

self.checked_ok()

621

1009

else:

622

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

623

vars(self))

1010

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

624

1011

else:

625

1012

self.last_checker_status = -1

1013

self.last_checker_signal = -returncode

626

1014

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

627

1015

vars(self))

628

629

def checked_ok(self, timeout=None):

630

"""Bump up the timeout for this client.

631

632

This should only be called when the client has been seen,

633

alive and well.

634

"""

1016

return False

1017

1018

def checked_ok(self):

1019

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

1020

self.last_checked_ok = datetime.datetime.utcnow()

1021

self.last_checker_status = 0

1022

self.last_checker_signal = None

1023

self.bump_timeout()

1024

1025

def bump_timeout(self, timeout=None):

1026

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

635

1027

if timeout is None:

636

1028

timeout = self.timeout

637

self.last_checked_ok = datetime.datetime.utcnow()

638

1029

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

1030

GLib.source_remove(self.disable_initiator_tag)

1031

self.disable_initiator_tag = None

640

1032

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

1033

self.disable_initiator_tag = GLib.timeout_add(

1034

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

644

1035

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

645

1036

646

1037

def need_approval(self):

647

1038

self.last_approval_request = datetime.datetime.utcnow()

648

1039

649

1040

def start_checker(self):

650

1041

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

651

1042

652

1043

If a checker already exists, leave it running and do

653

1044

nothing."""

654

1045

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

655

# did that, then if a checker (for some reason) started

656

# running slowly and taking more than 'interval' time, the

657

# client would inevitably timeout, since no checker would get

658

# a chance to run to completion. If we instead leave running

1046

# did that, and if a checker (for some reason) started running

1047

# slowly and taking more than 'interval' time, then the client

1048

# would inevitably timeout, since no checker would get a

1049

# chance to run to completion. If we instead leave running

659

1050

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

660

1051

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

661

1052

# should be.

662

663

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

664

try:

665

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

666

except (AttributeError, OSError) as error:

667

if (isinstance(error, OSError)

668

and error.errno != errno.ECHILD):

669

raise error

670

else:

671

if pid:

672

logger.warning("Checker was a zombie")

673

gobject.source_remove(self.checker_callback_tag)

674

self.checker_callback(pid, status,

675

self.current_checker_command)

1053

1054

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

1055

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

1056

self.checker.join()

1057

self.checker = None

676

1058

# Start a new checker if needed

677

1059

if self.checker is None:

1060

# Escape attributes for the shell

1061

escaped_attrs = {

1062

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

1063

for attr in self.runtime_expansions}

678

1064

try:

679

# In case checker_command has exactly one % operator

680

command = self.checker_command % self.host

681

except TypeError:

682

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

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

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

690

691

try:

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

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

695

' %s', self.checker_command, error)

696

return True # Try again later

1065

command = self.checker_command % escaped_attrs

1066

except TypeError as error:

1067

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

1068

self.checker_command,

1069

exc_info=error)

1070

return True # Try again later

697

1071

self.current_checker_command = command

698

try:

699

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

700

command, self.name)

701

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

702

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

703

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

704

# always replaced by /dev/null.)

705

self.checker = subprocess.Popen(command,

706

close_fds=True,

707

shell=True, cwd="/")

708

self.checker_callback_tag = (gobject.child_watch_add

709

(self.checker.pid,

710

self.checker_callback,

711

data=command))

712

# The checker may have completed before the gobject

713

# watch was added. Check for this.

714

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

715

if pid:

716

gobject.source_remove(self.checker_callback_tag)

717

self.checker_callback(pid, status, command)

718

except OSError as error:

719

logger.error("Failed to start subprocess: %s",

720

error)

721

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

1072

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

1073

self.name)

1074

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

1075

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

1076

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

1077

# always replaced by /dev/null.)

1078

# The exception is when not debugging but nevertheless

1079

# running in the foreground; use the previously

1080

# created wnull.

1081

popen_args = {"close_fds": True,

1082

"shell": True,

1083

"cwd": "/"}

1084

if (not self.server_settings["debug"]

1085

and self.server_settings["foreground"]):

1086

popen_args.update({"stdout": wnull,

1087

"stderr": wnull})

1088

pipe = multiprocessing.Pipe(duplex=False)

1089

self.checker = multiprocessing.Process(

1090

target=call_pipe,

1091

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

1092

kwargs=popen_args)

1093

self.checker.start()

1094

self.checker_callback_tag = GLib.io_add_watch(

1095

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

1096

self.checker_callback, pipe[0], command)

1097

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

722

1098

return True

723

1099

724

1100

def stop_checker(self):

725

1101

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

726

1102

if self.checker_callback_tag:

727

gobject.source_remove(self.checker_callback_tag)

1103

GLib.source_remove(self.checker_callback_tag)

728

1104

self.checker_callback_tag = None

729

1105

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

730

1106

return

731

1107

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

732

try:

733

os.kill(self.checker.pid, signal.SIGTERM)

734

#time.sleep(0.5)

735

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

736

# os.kill(self.checker.pid, signal.SIGKILL)

737

except OSError as error:

738

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

739

raise

1108

self.checker.terminate()

740

1109

self.checker = None

741

1110

742

1111

743

def dbus_service_property(dbus_interface, signature="v",

744

access="readwrite", byte_arrays=False):

1112

def dbus_service_property(dbus_interface,

1113

signature="v",

1114

access="readwrite",

1115

byte_arrays=False):

745

1116

"""Decorators for marking methods of a DBusObjectWithProperties to

746

1117

become properties on the D-Bus.

747

1118

748

1119

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

749

1120

and with one argument by "Set".

750

1121

751

1122

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

752

1123

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

753

1124

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

756

1127

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

757

1128

if byte_arrays and signature != "ay":

758

1129

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

759

" signature %r" % signature)

1130

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

1131

760

1132

def decorator(func):

761

1133

func._dbus_is_property = True

762

1134

func._dbus_interface = dbus_interface

765

1137

func._dbus_name = func.__name__

766

1138

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

767

1139

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

768

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

769

return func

1140

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

1141

return func

1142

1143

return decorator

1144

1145

1146

def dbus_interface_annotations(dbus_interface):

1147

"""Decorator for marking functions returning interface annotations

1148

1149

Usage:

1150

1151

@dbus_interface_annotations("org.example.Interface")

1152

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

1153

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

1154

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

1155

"false"}

1156

"""

1157

1158

def decorator(func):

1159

func._dbus_is_interface = True

1160

func._dbus_interface = dbus_interface

1161

func._dbus_name = dbus_interface

1162

return func

1163

1164

return decorator

1165

1166

1167

def dbus_annotations(annotations):

1168

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

1169

Usage:

1170

1171

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

1172

"org.freedesktop.DBus.Property."

1173

"EmitsChangedSignal": "false"})

1174

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

1175

access="r")

1176

def Property_dbus_property(self):

1177

return dbus.Boolean(False)

1178

1179

See also the DBusObjectWithAnnotations class.

1180

"""

1181

1182

def decorator(func):

1183

func._dbus_annotations = annotations

1184

return func

1185

770

1186

return decorator

771

1187

772

1188

773

1189

class DBusPropertyException(dbus.exceptions.DBusException):

774

1190

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

775

1191

"""

776

def __unicode__(self):

777

return unicode(str(self))

1192

pass

778

1193

779

1194

780

1195

class DBusPropertyAccessException(DBusPropertyException):

789

1204

pass

790

1205

791

1206

792

class DBusObjectWithProperties(dbus.service.Object):

1207

class DBusObjectWithAnnotations(dbus.service.Object):

1208

"""A D-Bus object with annotations.

1209

1210

Classes inheriting from this can use the dbus_annotations

1211

decorator to add annotations to methods or signals.

1212

"""

1213

1214

@staticmethod

1215

def _is_dbus_thing(thing):

1216

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

1217

1218

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

1219

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

1220

"""

1221

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

1222

False)

1223

1224

def _get_all_dbus_things(self, thing):

1225

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

1226

"""

1227

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

1228

athing.__get__(self))

1229

for cls in self.__class__.__mro__

1230

for name, athing in

1231

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

1232

1233

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1234

out_signature="s",

1235

path_keyword='object_path',

1236

connection_keyword='connection')

1237

def Introspect(self, object_path, connection):

1238

"""Overloading of standard D-Bus method.

1239

1240

Inserts annotation tags on methods and signals.

1241

"""

1242

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

1243

connection)

1244

try:

1245

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

1246

1247

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

1248

# Add annotation tags

1249

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

1250

for tag in if_tag.getElementsByTagName(typ):

1251

annots = dict()

1252

for name, prop in (self.

1253

_get_all_dbus_things(typ)):

1254

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

1255

and prop._dbus_interface

1256

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

1257

annots.update(getattr(

1258

prop, "_dbus_annotations", {}))

1259

for name, value in annots.items():

1260

ann_tag = document.createElement(

1261

"annotation")

1262

ann_tag.setAttribute("name", name)

1263

ann_tag.setAttribute("value", value)

1264

tag.appendChild(ann_tag)

1265

# Add interface annotation tags

1266

for annotation, value in dict(

1267

itertools.chain.from_iterable(

1268

annotations().items()

1269

for name, annotations

1270

in self._get_all_dbus_things("interface")

1271

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

1272

)).items():

1273

ann_tag = document.createElement("annotation")

1274

ann_tag.setAttribute("name", annotation)

1275

ann_tag.setAttribute("value", value)

1276

if_tag.appendChild(ann_tag)

1277

# Fix argument name for the Introspect method itself

1278

if (if_tag.getAttribute("name")

1279

== dbus.INTROSPECTABLE_IFACE):

1280

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

1281

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

1282

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

1283

if (arg.getAttribute("direction")

1284

== "out"):

1285

arg.setAttribute("name",

1286

"xml_data")

1287

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

1288

document.unlink()

1289

except (AttributeError, xml.dom.DOMException,

1290

xml.parsers.expat.ExpatError) as error:

1291

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

1292

exc_info=error)

1293

return xmlstring

1294

1295

1296

class DBusObjectWithProperties(DBusObjectWithAnnotations):

793

1297

"""A D-Bus object with properties.

794

1298

795

1299

Classes inheriting from this can use the dbus_service_property

796

1300

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

797

1301

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

798

1302

"""

799

800

@staticmethod

801

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

803

804

def _get_all_dbus_properties(self):

805

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

806

"""

807

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

808

for cls in self.__class__.__mro__

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

811

1303

812

1304

def _get_dbus_property(self, interface_name, property_name):

813

1305

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

814

1306

property with the specified name and interface.

815

1307

"""

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

1308

for cls in self.__class__.__mro__:

1309

for name, value in inspect.getmembers(

1310

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

819

1311

if (value._dbus_name == property_name

820

1312

and value._dbus_interface == interface_name):

821

1313

return value.__get__(self)

822

1314

823

1315

# No such property

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

825

+ interface_name + "."

826

+ property_name)

827

828

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

1316

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

1317

self.dbus_object_path, interface_name, property_name))

1318

1319

@classmethod

1320

def _get_all_interface_names(cls):

1321

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

1322

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

1323

"_dbus_interface", None)

1324

for x in (inspect.getmro(cls))

1325

for attr in dir(x))

1326

if name is not None)

1327

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="ss",

829

1330

out_signature="v")

830

1331

def Get(self, interface_name, property_name):

831

1332

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

837

1338

if not hasattr(value, "variant_level"):

838

1339

return value

839

1340

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

840

1341

841

1342

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

842

1343

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

843

1344

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

849

1350

# The byte_arrays option is not supported yet on

850

1351

# signatures other than "ay".

851

1352

if prop._dbus_signature != "ay":

852

raise ValueError

853

value = dbus.ByteArray(''.join(unichr(byte)

854

for byte in value))

1353

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

1354

"'ay' signature {!r}"

1355

.format(prop._dbus_signature))

1356

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

1357

for byte in value))

855

1358

prop(value)

856

857

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

1359

1360

@dbus.service.method(dbus.PROPERTIES_IFACE,

1361

in_signature="s",

858

1362

out_signature="a{sv}")

859

1363

def GetAll(self, interface_name):

860

1364

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

861

1365

standard.

862

1366

863

1367

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

864

1368

"""

865

1369

properties = {}

866

for name, prop in self._get_all_dbus_properties():

1370

for name, prop in self._get_all_dbus_things("property"):

867

1371

if (interface_name

868

1372

and interface_name != prop._dbus_interface):

869

1373

# Interface non-empty but did not match

875

1379

if not hasattr(value, "variant_level"):

876

1380

properties[name] = value

877

1381

continue

878

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

879

value.variant_level+1)

1382

properties[name] = type(value)(

1383

value, variant_level=value.variant_level + 1)

880

1384

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

881

1385

1386

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

1387

def PropertiesChanged(self, interface_name, changed_properties,

1388

invalidated_properties):

1389

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

1390

standard.

1391

"""

1392

pass

1393

882

1394

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

883

1395

out_signature="s",

884

1396

path_keyword='object_path',

885

1397

connection_keyword='connection')

886

1398

def Introspect(self, object_path, connection):

887

"""Standard D-Bus method, overloaded to insert property tags.

1399

"""Overloading of standard D-Bus method.

1400

1401

Inserts property tags and interface annotation tags.

888

1402

"""

889

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

890

connection)

1403

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1404

object_path,

1405

connection)

891

1406

try:

892

1407

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

1408

893

1409

def make_tag(document, name, prop):

894

1410

e = document.createElement("property")

895

1411

e.setAttribute("name", name)

896

1412

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

897

1413

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

898

1414

return e

1415

899

1416

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

1417

# Add property tags

900

1418

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

901

1419

for name, prop

902

in self._get_all_dbus_properties()

1420

in self._get_all_dbus_things("property")

903

1421

if prop._dbus_interface

904

1422

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

905

1423

if_tag.appendChild(tag)

1424

# Add annotation tags for properties

1425

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

1426

annots = dict()

1427

for name, prop in self._get_all_dbus_things(

1428

"property"):

1429

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

1430

and prop._dbus_interface

1431

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

1432

annots.update(getattr(

1433

prop, "_dbus_annotations", {}))

1434

for name, value in annots.items():

1435

ann_tag = document.createElement(

1436

"annotation")

1437

ann_tag.setAttribute("name", name)

1438

ann_tag.setAttribute("value", value)

1439

tag.appendChild(ann_tag)

906

1440

# Add the names to the return values for the

907

1441

# "org.freedesktop.DBus.Properties" methods

908

1442

if (if_tag.getAttribute("name")

923

1457

except (AttributeError, xml.dom.DOMException,

924

1458

xml.parsers.expat.ExpatError) as error:

925

1459

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

926

error)

927

return xmlstring

928

929

930

def datetime_to_dbus (dt, variant_level=0):

1460

exc_info=error)

1461

return xmlstring

1462

1463

1464

try:

1465

dbus.OBJECT_MANAGER_IFACE

1466

except AttributeError:

1467

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

1468

1469

1470

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1471

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

1472

1473

Classes inheriting from this exposes the standard

1474

GetManagedObjects call and the InterfacesAdded and

1475

InterfacesRemoved signals on the standard

1476

"org.freedesktop.DBus.ObjectManager" interface.

1477

1478

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

1479

manually.

1480

"""

1481

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1482

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

1483

def GetManagedObjects(self):

1484

"""This function must be overridden"""

1485

raise NotImplementedError()

1486

1487

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1488

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

1489

def InterfacesAdded(self, object_path, interfaces_and_properties):

1490

pass

1491

1492

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

1493

def InterfacesRemoved(self, object_path, interfaces):

1494

pass

1495

1496

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1497

out_signature="s",

1498

path_keyword='object_path',

1499

connection_keyword='connection')

1500

def Introspect(self, object_path, connection):

1501

"""Overloading of standard D-Bus method.

1502

1503

Override return argument name of GetManagedObjects to be

1504

"objpath_interfaces_and_properties"

1505

"""

1506

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1507

object_path,

1508

connection)

1509

try:

1510

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

1511

1512

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

1513

# Fix argument name for the GetManagedObjects method

1514

if (if_tag.getAttribute("name")

1515

== dbus.OBJECT_MANAGER_IFACE):

1516

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

1517

if (cn.getAttribute("name")

1518

== "GetManagedObjects"):

1519

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

1520

if (arg.getAttribute("direction")

1521

== "out"):

1522

arg.setAttribute(

1523

"name",

1524

"objpath_interfaces"

1525

"_and_properties")

1526

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

1527

document.unlink()

1528

except (AttributeError, xml.dom.DOMException,

1529

xml.parsers.expat.ExpatError) as error:

1530

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

1531

exc_info=error)

1532

return xmlstring

1533

1534

1535

def datetime_to_dbus(dt, variant_level=0):

931

1536

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

932

1537

if dt is None:

933

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

934

return dbus.String(dt.isoformat(),

935

variant_level=variant_level)

936

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

"""Applied to an empty subclass of a D-Bus object, this metaclass

941

will add additional D-Bus attributes matching a certain pattern.

1538

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

1539

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

1540

1541

1542

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1543

"""A class decorator; applied to a subclass of

1544

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

1545

interface names according to the "alt_interface_names" mapping.

1546

Usage:

1547

1548

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

1549

"net.example.AlternateInterface"})

1550

class SampleDBusObject(dbus.service.Object):

1551

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

1552

def SampleDBusMethod():

1553

pass

1554

1555

The above "SampleDBusMethod" on "SampleDBusObject" will be

1556

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

1557

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

1558

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

1559

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

1560

1561

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

1562

(from DBusObjectWithProperties) and interfaces (from the

1563

dbus_interface_annotations decorator).

942

1564

"""

943

def __new__(mcs, name, bases, attr):

944

# Go through all the base classes which could have D-Bus

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

if issubclass(b, dbus.service.Object)):

948

# Go though all attributes of the base class

949

for attrname, attribute in inspect.getmembers(base):

1565

1566

def wrapper(cls):

1567

for orig_interface_name, alt_interface_name in (

1568

alt_interface_names.items()):

1569

attr = {}

1570

interface_names = set()

1571

# Go though all attributes of the class

1572

for attrname, attribute in inspect.getmembers(cls):

950

1573

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

951

1574

# with the wrong interface name

952

1575

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

.startswith("se.recompile.Mandos")):

1576

or not attribute._dbus_interface.startswith(

1577

orig_interface_name)):

955

1578

continue

956

1579

# Create an alternate D-Bus interface name based on

957

1580

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1581

alt_interface = attribute._dbus_interface.replace(

1582

orig_interface_name, alt_interface_name)

1583

interface_names.add(alt_interface)

961

1584

# Is this a D-Bus signal?

962

1585

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

1586

# Extract the original non-method undecorated

1587

# function by black magic

1588

if sys.version_info.major == 2:

1589

nonmethod_func = (dict(

966

1590

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

1591

attribute.__closure__))

1592

["func"].cell_contents)

1593

else:

1594

nonmethod_func = (dict(

1595

zip(attribute.__code__.co_freevars,

1596

attribute.__closure__))

1597

["func"].cell_contents)

969

1598

# Create a new, but exactly alike, function

970

1599

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

971

1600

# with the alternate D-Bus interface name

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

1601

new_function = copy_function(nonmethod_func)

1602

new_function = (dbus.service.signal(

1603

alt_interface,

1604

attribute._dbus_signature)(new_function))

1605

# Copy annotations, if any

1606

try:

1607

new_function._dbus_annotations = dict(

1608

attribute._dbus_annotations)

1609

except AttributeError:

1610

pass

1611

981

1612

# Define a creator of a function to call both the

982

# old and new functions, so both the old and new

983

# signals gets sent when the function is called

1613

# original and alternate functions, so both the

1614

# original and alternate signals gets sent when

1615

# the function is called

984

1616

def fixscope(func1, func2):

985

1617

"""This function is a scope container to pass

986

1618

func1 and func2 to the "call_both" function

987

1619

outside of its arguments"""

1620

1621

@functools.wraps(func2)

988

1622

def call_both(*args, **kwargs):

989

1623

"""This function will emit two D-Bus

990

1624

signals by calling func1 and func2"""

991

1625

func1(*args, **kwargs)

992

1626

func2(*args, **kwargs)

1627

# Make wrapper function look like a D-Bus

1628

# signal

1629

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

1630

if name.startswith("_dbus_"):

1631

setattr(call_both, name, attr)

1632

993

1633

return call_both

994

1634

# Create the "call_both" function and add it to

995

1635

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

1636

attr[attrname] = fixscope(attribute, new_function)

998

1637

# Is this a D-Bus method?

999

1638

elif getattr(attribute, "_dbus_is_method", False):

1000

1639

# Create a new, but exactly alike, function

1001

1640

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

1002

1641

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

1003

1642

# to the class.

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1643

attr[attrname] = (

1644

dbus.service.method(

1645

alt_interface,

1646

attribute._dbus_in_signature,

1647

attribute._dbus_out_signature)

1648

(copy_function(attribute)))

1649

# Copy annotations, if any

1650

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1653

except AttributeError:

1654

pass

1014

1655

# Is this a D-Bus property?

1015

1656

elif getattr(attribute, "_dbus_is_property", False):

1016

1657

# Create a new, but exactly alike, function

1017

1658

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

1018

1659

# property with the alternate D-Bus interface

1019

1660

# name. Add it to the class.

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

1033

return type.__new__(mcs, name, bases, attr)

1034

1035

1661

attr[attrname] = (dbus_service_property(

1662

alt_interface, attribute._dbus_signature,

1663

attribute._dbus_access,

1664

attribute._dbus_get_args_options

1665

["byte_arrays"])

1666

(copy_function(attribute)))

1667

# Copy annotations, if any

1668

try:

1669

attr[attrname]._dbus_annotations = dict(

1670

attribute._dbus_annotations)

1671

except AttributeError:

1672

pass

1673

# Is this a D-Bus interface?

1674

elif getattr(attribute, "_dbus_is_interface", False):

1675

# Create a new, but exactly alike, function

1676

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

1677

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

1678

# to the class.

1679

attr[attrname] = (

1680

dbus_interface_annotations(alt_interface)

1681

(copy_function(attribute)))

1682

if deprecate:

1683

# Deprecate all alternate interfaces

1684

iname = "_AlternateDBusNames_interface_annotation{}"

1685

for interface_name in interface_names:

1686

1687

@dbus_interface_annotations(interface_name)

1688

def func(self):

1689

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

1690

"true"}

1691

# Find an unused name

1692

for aname in (iname.format(i)

1693

for i in itertools.count()):

1694

if aname not in attr:

1695

attr[aname] = func

1696

break

1697

if interface_names:

1698

# Replace the class with a new subclass of it with

1699

# methods, signals, etc. as created above.

1700

if sys.version_info.major == 2:

1701

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

1702

(cls, ), attr)

1703

else:

1704

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

1705

(cls, ), attr)

1706

return cls

1707

1708

return wrapper

1709

1710

1711

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

1712

"se.bsnet.fukt.Mandos"})

1036

1713

class ClientDBus(Client, DBusObjectWithProperties):

1037

1714

"""A Client class using D-Bus

1038

1715

1039

1716

Attributes:

1040

1717

dbus_object_path: dbus.ObjectPath

1041

1718

bus: dbus.SystemBus()

1042

1719

"""

1043

1720

1044

1721

runtime_expansions = (Client.runtime_expansions

1045

+ ("dbus_object_path",))

1046

1722

+ ("dbus_object_path", ))

1723

1724

_interface = "se.recompile.Mandos.Client"

1725

1047

1726

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

1048

1049

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

1727

1728

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

1050

1729

self.bus = bus

1051

1730

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1055

1731

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

1056

1732

# the D-Bus

1057

client_object_name = unicode(self.name).translate(

1733

client_object_name = str(self.name).translate(

1058

1734

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

1059

1735

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

1060

self.dbus_object_path = (dbus.ObjectPath

1061

("/clients/" + client_object_name))

1736

self.dbus_object_path = dbus.ObjectPath(

1737

"/clients/" + client_object_name)

1062

1738

DBusObjectWithProperties.__init__(self, self.bus,

1063

1739

self.dbus_object_path)

1064

1065

def notifychangeproperty(transform_func,

1066

dbus_name, type_func=lambda x: x,

1067

variant_level=1):

1740

1741

def notifychangeproperty(transform_func, dbus_name,

1742

type_func=lambda x: x,

1743

variant_level=1,

1744

invalidate_only=False,

1745

_interface=_interface):

1068

1746

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

1069

1747

its changes to DBus.

1070

1748

1071

1749

transform_fun: Function that takes a value and a variant_level

1072

1750

and transforms it to a D-Bus type.

1073

1751

dbus_name: D-Bus name of the variable

1075

1753

to the D-Bus. Default: no transform

1076

1754

variant_level: D-Bus variant level. Default: 1

1077

1755

"""

1078

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

1756

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

1757

1079

1758

def setter(self, value):

1080

1759

if hasattr(self, "dbus_object_path"):

1081

1760

if (not hasattr(self, attrname) or

1082

1761

type_func(getattr(self, attrname, None))

1083

1762

!= type_func(value)):

1084

dbus_value = transform_func(type_func(value),

1085

variant_level

1086

=variant_level)

1087

self.PropertyChanged(dbus.String(dbus_name),

1088

dbus_value)

1763

if invalidate_only:

1764

self.PropertiesChanged(

1765

_interface, dbus.Dictionary(),

1766

dbus.Array((dbus_name, )))

1767

else:

1768

dbus_value = transform_func(

1769

type_func(value),

1770

variant_level=variant_level)

1771

self.PropertyChanged(dbus.String(dbus_name),

1772

dbus_value)

1773

self.PropertiesChanged(

1774

_interface,

1775

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

1776

dbus_value}),

1777

dbus.Array())

1089

1778

setattr(self, attrname, value)

1090

1779

1091

1780

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

1092

1093

1781

1094

1782

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1095

1783

approvals_pending = notifychangeproperty(dbus.Boolean,

1096

1784

"ApprovalPending",

1097

type_func = bool)

1785

type_func=bool)

1098

1786

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

1099

1787

last_enabled = notifychangeproperty(datetime_to_dbus,

1100

1788

"LastEnabled")

1101

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

1102

type_func = lambda checker:

1103

checker is not None)

1789

checker = notifychangeproperty(

1790

dbus.Boolean, "CheckerRunning",

1791

type_func=lambda checker: checker is not None)

1104

1792

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1105

1793

"LastCheckedOK")

1794

last_checker_status = notifychangeproperty(dbus.Int16,

1795

"LastCheckerStatus")

1106

1796

last_approval_request = notifychangeproperty(

1107

1797

datetime_to_dbus, "LastApprovalRequest")

1108

1798

approved_by_default = notifychangeproperty(dbus.Boolean,

1109

1799

"ApprovedByDefault")

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1800

approval_delay = notifychangeproperty(

1801

dbus.UInt64, "ApprovalDelay",

1802

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

1114

1803

approval_duration = notifychangeproperty(

1115

1804

dbus.UInt64, "ApprovalDuration",

1116

type_func = timedelta_to_milliseconds)

1805

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

1117

1806

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

1118

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

1119

type_func =

1120

timedelta_to_milliseconds)

1807

timeout = notifychangeproperty(

1808

dbus.UInt64, "Timeout",

1809

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

1121

1810

extended_timeout = notifychangeproperty(

1122

1811

dbus.UInt64, "ExtendedTimeout",

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

1812

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

1813

interval = notifychangeproperty(

1814

dbus.UInt64, "Interval",

1815

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

1128

1816

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

1129

1817

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

1818

invalidate_only=True)

1819

1130

1820

del notifychangeproperty

1131

1821

1132

1822

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

1133

1823

try:

1134

1824

self.remove_from_connection()

1137

1827

if hasattr(DBusObjectWithProperties, "__del__"):

1138

1828

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

1139

1829

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

1140

1141

def checker_callback(self, pid, condition, command,

1142

*args, **kwargs):

1143

self.checker_callback_tag = None

1144

self.checker = None

1145

if os.WIFEXITED(condition):

1146

exitstatus = os.WEXITSTATUS(condition)

1830

1831

def checker_callback(self, source, condition,

1832

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

1833

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

1834

connection, command, *args,

1835

**kwargs)

1836

exitstatus = self.last_checker_status

1837

if exitstatus >= 0:

1147

1838

# Emit D-Bus signal

1148

1839

self.CheckerCompleted(dbus.Int16(exitstatus),

1149

dbus.Int64(condition),

1840

# This is specific to GNU libC

1841

dbus.Int64(exitstatus << 8),

1150

1842

dbus.String(command))

1151

1843

else:

1152

1844

# Emit D-Bus signal

1153

1845

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

1154

dbus.Int64(condition),

1846

dbus.Int64(

1847

# This is specific to GNU libC

1848

(exitstatus << 8)

1849

| self.last_checker_signal),

1155

1850

dbus.String(command))

1156

1157

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

1158

*args, **kwargs)

1159

1851

return ret

1852

1160

1853

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

1161

old_checker = self.checker

1162

if self.checker is not None:

1163

old_checker_pid = self.checker.pid

1164

else:

1165

old_checker_pid = None

1854

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

1166

1855

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

1167

1856

# Only if new checker process was started

1168

1857

if (self.checker is not None

1170

1859

# Emit D-Bus signal

1171

1860

self.CheckerStarted(self.current_checker_command)

1172

1861

return r

1173

1862

1174

1863

def _reset_approved(self):

1175

1864

self.approved = None

1176

1865

return False

1177

1866

1178

1867

def approve(self, value=True):

1179

self.send_changedstate()

1180

1868

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

1182

(self.approval_duration),

1183

self._reset_approved)

1184

1185

1186

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

1188

1189

## Signals

1190

1869

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

1870

* 1000), self._reset_approved)

1871

self.send_changedstate()

1872

1873

# D-Bus methods, signals & properties

1874

1875

# Interfaces

1876

1877

# Signals

1878

1191

1879

# CheckerCompleted - signal

1192

1880

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

1193

1881

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

1194

1882

"D-Bus signal"

1195

1883

pass

1196

1884

1197

1885

# CheckerStarted - signal

1198

1886

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

1199

1887

def CheckerStarted(self, command):

1200

1888

"D-Bus signal"

1201

1889

pass

1202

1890

1203

1891

# PropertyChanged - signal

1892

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

1204

1893

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

1205

1894

def PropertyChanged(self, property, value):

1206

1895

"D-Bus signal"

1207

1896

pass

1208

1897

1209

1898

# GotSecret - signal

1210

1899

@dbus.service.signal(_interface)

1211

1900

def GotSecret(self):

1214

1903

server to mandos-client

1215

1904

"""

1216

1905

pass

1217

1906

1218

1907

# Rejected - signal

1219

1908

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

1220

1909

def Rejected(self, reason):

1221

1910

"D-Bus signal"

1222

1911

pass

1223

1912

1224

1913

# NeedApproval - signal

1225

1914

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

1226

1915

def NeedApproval(self, timeout, default):

1227

1916

"D-Bus signal"

1228

1917

return self.need_approval()

1229

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

1238

## Methods

1239

1918

1919

# Methods

1920

1240

1921

# Approve - method

1241

1922

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

1242

1923

def Approve(self, value):

1243

1924

self.approve(value)

1244

1925

1245

1926

# CheckedOK - method

1246

1927

@dbus.service.method(_interface)

1247

1928

def CheckedOK(self):

1248

1929

self.checked_ok()

1249

1930

1250

1931

# Enable - method

1932

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

1251

1933

@dbus.service.method(_interface)

1252

1934

def Enable(self):

1253

1935

"D-Bus method"

1254

1936

self.enable()

1255

1937

1256

1938

# StartChecker - method

1939

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

1257

1940

@dbus.service.method(_interface)

1258

1941

def StartChecker(self):

1259

1942

"D-Bus method"

1260

1943

self.start_checker()

1261

1944

1262

1945

# Disable - method

1946

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

1263

1947

@dbus.service.method(_interface)

1264

1948

def Disable(self):

1265

1949

"D-Bus method"

1266

1950

self.disable()

1267

1951

1268

1952

# StopChecker - method

1953

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

1269

1954

@dbus.service.method(_interface)

1270

1955

def StopChecker(self):

1271

1956

self.stop_checker()

1272

1273

## Properties

1274

1957

1958

# Properties

1959

1275

1960

# ApprovalPending - property

1276

1961

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

1277

1962

def ApprovalPending_dbus_property(self):

1278

1963

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

1279

1964

1280

1965

# ApprovedByDefault - property

1281

@dbus_service_property(_interface, signature="b",

1966

@dbus_service_property(_interface,

1967

signature="b",

1282

1968

access="readwrite")

1283

1969

def ApprovedByDefault_dbus_property(self, value=None):

1284

1970

if value is None: # get

1285

1971

return dbus.Boolean(self.approved_by_default)

1286

1972

self.approved_by_default = bool(value)

1287

1973

1288

1974

# ApprovalDelay - property

1289

@dbus_service_property(_interface, signature="t",

1975

@dbus_service_property(_interface,

1976

signature="t",

1290

1977

access="readwrite")

1291

1978

def ApprovalDelay_dbus_property(self, value=None):

1292

1979

if value is None: # get

1293

return dbus.UInt64(self.approval_delay_milliseconds())

1980

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

1981

* 1000)

1294

1982

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

1295

1983

1296

1984

# ApprovalDuration - property

1297

@dbus_service_property(_interface, signature="t",

1985

@dbus_service_property(_interface,

1986

signature="t",

1298

1987

access="readwrite")

1299

1988

def ApprovalDuration_dbus_property(self, value=None):

1300

1989

if value is None: # get

1301

return dbus.UInt64(timedelta_to_milliseconds(

1302

self.approval_duration))

1990

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

1991

* 1000)

1303

1992

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

1304

1993

1305

1994

# Name - property

1995

@dbus_annotations(

1996

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

1306

1997

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

1307

1998

def Name_dbus_property(self):

1308

1999

return dbus.String(self.name)

1309

2000

1310

2001

# Fingerprint - property

2002

@dbus_annotations(

2003

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

1311

2004

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

1312

2005

def Fingerprint_dbus_property(self):

1313

2006

return dbus.String(self.fingerprint)

1314

2007

1315

2008

# Host - property

1316

@dbus_service_property(_interface, signature="s",

2009

@dbus_service_property(_interface,

2010

signature="s",

1317

2011

access="readwrite")

1318

2012

def Host_dbus_property(self, value=None):

1319

2013

if value is None: # get

1320

2014

return dbus.String(self.host)

1321

self.host = unicode(value)

1322

2015

self.host = str(value)

2016

1323

2017

# Created - property

2018

@dbus_annotations(

2019

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

1324

2020

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

1325

2021

def Created_dbus_property(self):

1326

2022

return datetime_to_dbus(self.created)

1327

2023

1328

2024

# LastEnabled - property

1329

2025

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

1330

2026

def LastEnabled_dbus_property(self):

1331

2027

return datetime_to_dbus(self.last_enabled)

1332

2028

1333

2029

# Enabled - property

1334

@dbus_service_property(_interface, signature="b",

2030

@dbus_service_property(_interface,

2031

signature="b",

1335

2032

access="readwrite")

1336

2033

def Enabled_dbus_property(self, value=None):

1337

2034

if value is None: # get

1340

2037

self.enable()

1341

2038

else:

1342

2039

self.disable()

1343

2040

1344

2041

# LastCheckedOK - property

1345

@dbus_service_property(_interface, signature="s",

2042

@dbus_service_property(_interface,

2043

signature="s",

1346

2044

access="readwrite")

1347

2045

def LastCheckedOK_dbus_property(self, value=None):

1348

2046

if value is not None:

1349

2047

self.checked_ok()

1350

2048

return

1351

2049

return datetime_to_dbus(self.last_checked_ok)

1352

2050

2051

# LastCheckerStatus - property

2052

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

2053

def LastCheckerStatus_dbus_property(self):

2054

return dbus.Int16(self.last_checker_status)

2055

1353

2056

# Expires - property

1354

2057

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

1355

2058

def Expires_dbus_property(self):

1356

2059

return datetime_to_dbus(self.expires)

1357

2060

1358

2061

# LastApprovalRequest - property

1359

2062

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

1360

2063

def LastApprovalRequest_dbus_property(self):

1361

2064

return datetime_to_dbus(self.last_approval_request)

1362

2065

1363

2066

# Timeout - property

1364

@dbus_service_property(_interface, signature="t",

2067

@dbus_service_property(_interface,

2068

signature="t",

1365

2069

access="readwrite")

1366

2070

def Timeout_dbus_property(self, value=None):

1367

2071

if value is None: # get

1368

return dbus.UInt64(self.timeout_milliseconds())

2072

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

2073

old_timeout = self.timeout

1369

2074

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

1370

# Reschedule timeout

2075

# Reschedule disabling

1371

2076

if self.enabled:

1372

2077

now = datetime.datetime.utcnow()

1373

time_to_die = timedelta_to_milliseconds(

1374

(self.last_checked_ok + self.timeout) - now)

1375

if time_to_die <= 0:

2078

self.expires += self.timeout - old_timeout

2079

if self.expires <= now:

1376

2080

# The timeout has passed

1377

2081

self.disable()

1378

2082

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1382

2083

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

1383

2084

is None):

1384

2085

return

1385

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1389

2086

GLib.source_remove(self.disable_initiator_tag)

2087

self.disable_initiator_tag = GLib.timeout_add(

2088

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

2089

self.disable)

2090

1390

2091

# ExtendedTimeout - property

1391

@dbus_service_property(_interface, signature="t",

2092

@dbus_service_property(_interface,

2093

signature="t",

1392

2094

access="readwrite")

1393

2095

def ExtendedTimeout_dbus_property(self, value=None):

1394

2096

if value is None: # get

1395

return dbus.UInt64(self.extended_timeout_milliseconds())

2097

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

2098

* 1000)

1396

2099

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

1397

2100

1398

2101

# Interval - property

1399

@dbus_service_property(_interface, signature="t",

2102

@dbus_service_property(_interface,

2103

signature="t",

1400

2104

access="readwrite")

1401

2105

def Interval_dbus_property(self, value=None):

1402

2106

if value is None: # get

1403

return dbus.UInt64(self.interval_milliseconds())

2107

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

1404

2108

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

1405

2109

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

1406

2110

return

1407

2111

if self.enabled:

1408

2112

# Reschedule checker run

1409

gobject.source_remove(self.checker_initiator_tag)

1410

self.checker_initiator_tag = (gobject.timeout_add

1411

(value, self.start_checker))

1412

self.start_checker() # Start one now, too

1413

2113

GLib.source_remove(self.checker_initiator_tag)

2114

self.checker_initiator_tag = GLib.timeout_add(

2115

value, self.start_checker)

2116

self.start_checker() # Start one now, too

2117

1414

2118

# Checker - property

1415

@dbus_service_property(_interface, signature="s",

2119

@dbus_service_property(_interface,

2120

signature="s",

1416

2121

access="readwrite")

1417

2122

def Checker_dbus_property(self, value=None):

1418

2123

if value is None: # get

1419

2124

return dbus.String(self.checker_command)

1420

self.checker_command = unicode(value)

1421

2125

self.checker_command = str(value)

2126

1422

2127

# CheckerRunning - property

1423

@dbus_service_property(_interface, signature="b",

2128

@dbus_service_property(_interface,

2129

signature="b",

1424

2130

access="readwrite")

1425

2131

def CheckerRunning_dbus_property(self, value=None):

1426

2132

if value is None: # get

1429

2135

self.start_checker()

1430

2136

else:

1431

2137

self.stop_checker()

1432

2138

1433

2139

# ObjectPath - property

2140

@dbus_annotations(

2141

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

2142

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

1434

2143

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

1435

2144

def ObjectPath_dbus_property(self):

1436

return self.dbus_object_path # is already a dbus.ObjectPath

1437

2145

return self.dbus_object_path # is already a dbus.ObjectPath

2146

1438

2147

# Secret = property

1439

@dbus_service_property(_interface, signature="ay",

1440

access="write", byte_arrays=True)

2148

@dbus_annotations(

2149

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

2150

"invalidates"})

2151

@dbus_service_property(_interface,

2152

signature="ay",

2153

access="write",

2154

byte_arrays=True)

1441

2155

def Secret_dbus_property(self, value):

1442

self.secret = str(value)

1443

2156

self.secret = bytes(value)

2157

1444

2158

del _interface

1445

2159

1446

2160

1449

2163

self._pipe = child_pipe

1450

2164

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

1451

2165

if not self._pipe.recv():

1452

raise KeyError()

1453

2166

raise KeyError(fpr)

2167

1454

2168

def __getattribute__(self, name):

1455

2169

if name == '_pipe':

1456

2170

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

1459

2173

if data[0] == 'data':

1460

2174

return data[1]

1461

2175

if data[0] == 'function':

2176

1462

2177

def func(*args, **kwargs):

1463

2178

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

1464

2179

return self._pipe.recv()[1]

2180

1465

2181

return func

1466

2182

1467

2183

def __setattr__(self, name, value):

1468

2184

if name == '_pipe':

1469

2185

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

1470

2186

self._pipe.send(('setattr', name, value))

1471

2187

1472

2188

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1477

2189

class ClientHandler(socketserver.BaseRequestHandler, object):

1478

2190

"""A class to handle client connections.

1479

2191

1480

2192

Instantiated once for each connection to handle it.

1481

2193

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

1482

2194

1483

2195

def handle(self):

1484

2196

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

1485

2197

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

1486

unicode(self.client_address))

2198

str(self.client_address))

1487

2199

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

1488

2200

self.server.child_pipe.fileno())

1489

1490

session = (gnutls.connection

1491

.ClientSession(self.request,

1492

gnutls.connection

1493

.X509Credentials()))

1494

1495

# Note: gnutls.connection.X509Credentials is really a

1496

# generic GnuTLS certificate credentials object so long as

1497

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

1498

# here despite using OpenPGP certificates.

1499

1500

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

1501

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

1502

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

1503

# "+DHE-DSS"))

2201

2202

session = gnutls.ClientSession(self.request)

2203

2204

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

2205

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

2206

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

2207

# "+DHE-DSS"))

1504

2208

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

1505

2209

priority = self.server.gnutls_priority

1506

2210

if priority is None:

1507

2211

priority = "NORMAL"

1508

(gnutls.library.functions

1509

.gnutls_priority_set_direct(session._c_object,

1510

priority, None))

1511

2212

gnutls.priority_set_direct(session._c_object,

2213

priority.encode("utf-8"),

2214

None)

2215

1512

2216

# Start communication using the Mandos protocol

1513

2217

# Get protocol number

1514

2218

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

1515

2219

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

1516

2220

try:

1517

2221

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

1518

raise RuntimeError

2222

raise RuntimeError(line)

1519

2223

except (ValueError, IndexError, RuntimeError) as error:

1520

2224

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

1521

2225

return

1522

2226

1523

2227

# Start GnuTLS connection

1524

2228

try:

1525

2229

session.handshake()

1526

except gnutls.errors.GNUTLSError as error:

2230

except gnutls.Error as error:

1527

2231

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

1528

2232

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

1529

2233

# established. Just abandon the request.

1530

2234

return

1531

2235

logger.debug("Handshake succeeded")

1532

2236

1533

2237

approval_required = False

1534

2238

try:

1535

2239

try:

1536

fpr = self.fingerprint(self.peer_certificate

1537

(session))

1538

except (TypeError,

1539

gnutls.errors.GNUTLSError) as error:

2240

fpr = self.fingerprint(

2241

self.peer_certificate(session))

2242

except (TypeError, gnutls.Error) as error:

1540

2243

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

1541

2244

return

1542

2245

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

1543

2246

1544

2247

try:

1545

2248

client = ProxyClient(child_pipe, fpr,

1546

2249

self.client_address)

1547

2250

except KeyError:

1548

2251

return

1549

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

2252

1554

2253

if client.approval_delay:

1555

2254

delay = client.approval_delay

1556

2255

client.approvals_pending += 1

1557

2256

approval_required = True

1558

2257

1559

2258

while True:

1560

2259

if not client.enabled:

1561

2260

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

1562

client.name)

2261

client.name)

1563

2262

if self.server.use_dbus:

1564

2263

# Emit D-Bus signal

1565

2264

client.Rejected("Disabled")

1566

2265

return

1567

2266

1568

2267

if client.approved or not client.approval_delay:

1569

#We are approved or approval is disabled

2268

# We are approved or approval is disabled

1570

2269

break

1571

2270

elif client.approved is None:

1572

2271

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

1574

2273

if self.server.use_dbus:

1575

2274

# Emit D-Bus signal

1576

2275

client.NeedApproval(

1577

client.approval_delay_milliseconds(),

1578

client.approved_by_default)

2276

client.approval_delay.total_seconds()

2277

* 1000, client.approved_by_default)

1579

2278

else:

1580

2279

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

1581

2280

client.name)

1583

2282

# Emit D-Bus signal

1584

2283

client.Rejected("Denied")

1585

2284

return

1586

1587

#wait until timeout or approved

2285

2286

# wait until timeout or approved

1588

2287

time = datetime.datetime.now()

1589

2288

client.changedstate.acquire()

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

2289

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

1593

2290

client.changedstate.release()

1594

2291

time2 = datetime.datetime.now()

1595

2292

if (time2 - time) >= delay:

1605

2302

break

1606

2303

else:

1607

2304

delay -= time2 - time

1608

1609

sent_size = 0

1610

while sent_size < len(client.secret):

1611

try:

1612

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

1613

except gnutls.errors.GNUTLSError as error:

1614

logger.warning("gnutls send failed")

1615

return

1616

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

1617

sent, len(client.secret)

1618

- (sent_size + sent))

1619

sent_size += sent

1620

2305

2306

try:

2307

session.send(client.secret)

2308

except gnutls.Error as error:

2309

logger.warning("gnutls send failed",

2310

exc_info=error)

2311

return

2312

1621

2313

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

1622

2314

# bump the timeout using extended_timeout

1623

client.checked_ok(client.extended_timeout)

2315

client.bump_timeout(client.extended_timeout)

1624

2316

if self.server.use_dbus:

1625

2317

# Emit D-Bus signal

1626

2318

client.GotSecret()

1627

2319

1628

2320

finally:

1629

2321

if approval_required:

1630

2322

client.approvals_pending -= 1

1631

2323

try:

1632

2324

session.bye()

1633

except gnutls.errors.GNUTLSError as error:

1634

logger.warning("GnuTLS bye failed")

1635

2325

except gnutls.Error as error:

2326

logger.warning("GnuTLS bye failed",

2327

exc_info=error)

2328

1636

2329

@staticmethod

1637

2330

def peer_certificate(session):

1638

2331

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

1639

2332

# If not an OpenPGP certificate...

1640

if (gnutls.library.functions

1641

.gnutls_certificate_type_get(session._c_object)

1642

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1643

# ...do the normal thing

1644

return session.peer_certificate

2333

if (gnutls.certificate_type_get(session._c_object)

2334

!= gnutls.CRT_OPENPGP):

2335

# ...return invalid data

2336

return b""

1645

2337

list_size = ctypes.c_uint(1)

1646

cert_list = (gnutls.library.functions

1647

.gnutls_certificate_get_peers

2338

cert_list = (gnutls.certificate_get_peers

1648

2339

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

1649

2340

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

1650

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

1651

" certificate")

2341

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

1652

2342

if list_size.value == 0:

1653

2343

return None

1654

2344

cert = cert_list[0]

1655

2345

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

1656

2346

1657

2347

@staticmethod

1658

2348

def fingerprint(openpgp):

1659

2349

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1660

2350

# New GnuTLS "datum" with the OpenPGP public key

1661

datum = (gnutls.library.types

1662

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

1663

ctypes.POINTER

1664

(ctypes.c_ubyte)),

1665

ctypes.c_uint(len(openpgp))))

2351

datum = gnutls.datum_t(

2352

ctypes.cast(ctypes.c_char_p(openpgp),

2353

ctypes.POINTER(ctypes.c_ubyte)),

2354

ctypes.c_uint(len(openpgp)))

1666

2355

# New empty GnuTLS certificate

1667

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1668

(gnutls.library.functions

1669

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2356

crt = gnutls.openpgp_crt_t()

2357

gnutls.openpgp_crt_init(ctypes.byref(crt))

1670

2358

# Import the OpenPGP public key into the certificate

1671

(gnutls.library.functions

1672

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

1673

gnutls.library.constants

1674

.GNUTLS_OPENPGP_FMT_RAW))

2359

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

2360

gnutls.OPENPGP_FMT_RAW)

1675

2361

# Verify the self signature in the key

1676

2362

crtverify = ctypes.c_uint()

1677

(gnutls.library.functions

1678

.gnutls_openpgp_crt_verify_self(crt, 0,

1679

ctypes.byref(crtverify)))

2363

gnutls.openpgp_crt_verify_self(crt, 0,

2364

ctypes.byref(crtverify))

1680

2365

if crtverify.value != 0:

1681

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1682

raise (gnutls.errors.CertificateSecurityError

1683

("Verify failed"))

2366

gnutls.openpgp_crt_deinit(crt)

2367

raise gnutls.CertificateSecurityError("Verify failed")

1684

2368

# New buffer for the fingerprint

1685

2369

buf = ctypes.create_string_buffer(20)

1686

2370

buf_len = ctypes.c_size_t()

1687

2371

# Get the fingerprint from the certificate into the buffer

1688

(gnutls.library.functions

1689

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

1690

ctypes.byref(buf_len)))

2372

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

2373

ctypes.byref(buf_len))

1691

2374

# Deinit the certificate

1692

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2375

gnutls.openpgp_crt_deinit(crt)

1693

2376

# Convert the buffer to a Python bytestring

1694

2377

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

1695

2378

# Convert the bytestring to hexadecimal notation

1699

2382

1700

2383

class MultiprocessingMixIn(object):

1701

2384

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

2385

1702

2386

def sub_process_main(self, request, address):

1703

2387

try:

1704

2388

self.finish_request(request, address)

1705

2389

except Exception:

1706

2390

self.handle_error(request, address)

1707

2391

self.close_request(request)

1708

2392

1709

2393

def process_request(self, request, address):

1710

2394

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

1711

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

1712

args = (request,

1713

address))

2395

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

2396

args=(request, address))

1714

2397

proc.start()

1715

2398

return proc

1716

2399

1717

2400

1718

2401

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1719

2402

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

2403

1720

2404

def process_request(self, request, client_address):

1721

2405

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

1722

2406

1723

2407

This function creates a new pipe in self.pipe

1724

2408

"""

1725

2409

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1726

2410

1727

2411

proc = MultiprocessingMixIn.process_request(self, request,

1728

2412

client_address)

1729

2413

self.child_pipe.close()

1730

2414

self.add_pipe(parent_pipe, proc)

1731

2415

1732

2416

def add_pipe(self, parent_pipe, proc):

1733

2417

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

1734

raise NotImplementedError

2418

raise NotImplementedError()

1735

2419

1736

2420

1737

2421

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1738

2422

socketserver.TCPServer, object):

1739

2423

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

1740

2424

1741

2425

Attributes:

1742

2426

enabled: Boolean; whether this server is activated yet

1743

2427

interface: None or a network interface name (string)

1744

2428

use_ipv6: Boolean; to use IPv6 or not

1745

2429

"""

2430

1746

2431

def __init__(self, server_address, RequestHandlerClass,

1747

interface=None, use_ipv6=True):

2432

interface=None,

2433

use_ipv6=True,

2434

socketfd=None):

2435

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

2436

creating a new one with socket.socket().

2437

"""

1748

2438

self.interface = interface

1749

2439

if use_ipv6:

1750

2440

self.address_family = socket.AF_INET6

2441

if socketfd is not None:

2442

# Save the file descriptor

2443

self.socketfd = socketfd

2444

# Save the original socket.socket() function

2445

self.socket_socket = socket.socket

2446

2447

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

2448

#

2449

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

2450

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

2451

# patching socket.socket.)

2452

#

2453

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

2454

@functools.wraps(socket.socket)

2455

def socket_wrapper(*args, **kwargs):

2456

# Restore original function so subsequent calls are

2457

# not affected.

2458

socket.socket = self.socket_socket

2459

del self.socket_socket

2460

# This time only, return a new socket object from the

2461

# saved file descriptor.

2462

return socket.fromfd(self.socketfd, *args, **kwargs)

2463

# Replace socket.socket() function with wrapper

2464

socket.socket = socket_wrapper

2465

# The socketserver.TCPServer.__init__ will call

2466

# socket.socket(), which might be our replacement,

2467

# socket_wrapper(), if socketfd was set.

1751

2468

socketserver.TCPServer.__init__(self, server_address,

1752

2469

RequestHandlerClass)

2470

1753

2471

def server_bind(self):

1754

2472

"""This overrides the normal server_bind() function

1755

2473

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

1756

2474

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

2475

global SO_BINDTODEVICE

1757

2476

if self.interface is not None:

1758

2477

if SO_BINDTODEVICE is None:

1759

logger.error("SO_BINDTODEVICE does not exist;"

1760

" cannot bind to interface %s",

1761

self.interface)

1762

else:

1763

try:

1764

self.socket.setsockopt(socket.SOL_SOCKET,

1765

SO_BINDTODEVICE,

1766

str(self.interface

1767

+ '\0'))

1768

except socket.error as error:

1769

if error[0] == errno.EPERM:

1770

logger.error("No permission to"

1771

" bind to interface %s",

1772

self.interface)

1773

elif error[0] == errno.ENOPROTOOPT:

1774

logger.error("SO_BINDTODEVICE not available;"

1775

" cannot bind to interface %s",

1776

self.interface)

1777

else:

1778

raise

2478

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

2479

# common enough.

2480

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

2481

SO_BINDTODEVICE = 25

2482

try:

2483

self.socket.setsockopt(

2484

socket.SOL_SOCKET, SO_BINDTODEVICE,

2485

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

2486

except socket.error as error:

2487

if error.errno == errno.EPERM:

2488

logger.error("No permission to bind to"

2489

" interface %s", self.interface)

2490

elif error.errno == errno.ENOPROTOOPT:

2491

logger.error("SO_BINDTODEVICE not available;"

2492

" cannot bind to interface %s",

2493

self.interface)

2494

elif error.errno == errno.ENODEV:

2495

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

2496

" cannot bind", self.interface)

2497

else:

2498

raise

1779

2499

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

1780

2500

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

1781

2501

if not self.server_address[0]:

1782

2502

if self.address_family == socket.AF_INET6:

1783

any_address = "::" # in6addr_any

2503

any_address = "::" # in6addr_any

1784

2504

else:

1785

any_address = socket.INADDR_ANY

2505

any_address = "0.0.0.0" # INADDR_ANY

1786

2506

self.server_address = (any_address,

1787

2507

self.server_address[1])

1788

2508

elif not self.server_address[1]:

1789

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

1790

0)

2509

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

1791

2510

# if self.interface:

1792

2511

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

1793

2512

# 0, # port

1799

2518

1800

2519

class MandosServer(IPv6_TCPServer):

1801

2520

"""Mandos server.

1802

2521

1803

2522

Attributes:

1804

2523

clients: set of Client objects

1805

2524

gnutls_priority GnuTLS priority string

1806

2525

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

1807

1808

Assumes a gobject.MainLoop event loop.

2526

2527

Assumes a GLib.MainLoop event loop.

1809

2528

"""

2529

1810

2530

def __init__(self, server_address, RequestHandlerClass,

1811

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

1812

gnutls_priority=None, use_dbus=True):

2531

interface=None,

2532

use_ipv6=True,

2533

clients=None,

2534

gnutls_priority=None,

2535

use_dbus=True,

2536

socketfd=None):

1813

2537

self.enabled = False

1814

2538

self.clients = clients

1815

2539

if self.clients is None:

1818

2542

self.gnutls_priority = gnutls_priority

1819

2543

IPv6_TCPServer.__init__(self, server_address,

1820

2544

RequestHandlerClass,

1821

interface = interface,

1822

use_ipv6 = use_ipv6)

2545

interface=interface,

2546

use_ipv6=use_ipv6,

2547

socketfd=socketfd)

2548

1823

2549

def server_activate(self):

1824

2550

if self.enabled:

1825

2551

return socketserver.TCPServer.server_activate(self)

1826

2552

1827

2553

def enable(self):

1828

2554

self.enabled = True

1829

2555

1830

2556

def add_pipe(self, parent_pipe, proc):

1831

2557

# Call "handle_ipc" for both data and EOF events

1832

gobject.io_add_watch(parent_pipe.fileno(),

1833

gobject.IO_IN | gobject.IO_HUP,

1834

functools.partial(self.handle_ipc,

1835

parent_pipe =

1836

parent_pipe,

1837

proc = proc))

1838

1839

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

1840

proc = None, client_object=None):

1841

condition_names = {

1842

gobject.IO_IN: "IN", # There is data to read.

1843

gobject.IO_OUT: "OUT", # Data can be written (without

1844

# blocking).

1845

gobject.IO_PRI: "PRI", # There is urgent data to read.

1846

gobject.IO_ERR: "ERR", # Error condition.

1847

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1848

# broken, usually for pipes and

1849

# sockets).

1850

}

1851

conditions_string = ' | '.join(name

1852

for cond, name in

1853

condition_names.iteritems()

1854

if cond & condition)

2558

GLib.io_add_watch(

2559

parent_pipe.fileno(),

2560

GLib.IO_IN | GLib.IO_HUP,

2561

functools.partial(self.handle_ipc,

2562

parent_pipe=parent_pipe,

2563

proc=proc))

2564

2565

def handle_ipc(self, source, condition,

2566

parent_pipe=None,

2567

proc=None,

2568

client_object=None):

1855

2569

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

1856

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

2570

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

1857

2571

# Wait for other process to exit

1858

2572

proc.join()

1859

2573

return False

1860

2574

1861

2575

# Read a request from the child

1862

2576

request = parent_pipe.recv()

1863

2577

command = request[0]

1864

2578

1865

2579

if command == 'init':

1866

2580

fpr = request[1]

1867

2581

address = request[2]

1868

1869

for c in self.clients.itervalues():

2582

2583

for c in self.clients.values():

1870

2584

if c.fingerprint == fpr:

1871

2585

client = c

1872

2586

break

1879

2593

address[0])

1880

2594

parent_pipe.send(False)

1881

2595

return False

1882

1883

gobject.io_add_watch(parent_pipe.fileno(),

1884

gobject.IO_IN | gobject.IO_HUP,

1885

functools.partial(self.handle_ipc,

1886

parent_pipe =

1887

parent_pipe,

1888

proc = proc,

1889

client_object =

1890

client))

2596

2597

GLib.io_add_watch(

2598

parent_pipe.fileno(),

2599

GLib.IO_IN | GLib.IO_HUP,

2600

functools.partial(self.handle_ipc,

2601

parent_pipe=parent_pipe,

2602

proc=proc,

2603

client_object=client))

1891

2604

parent_pipe.send(True)

1892

2605

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

1893

2606

# same fileno

1896

2609

funcname = request[1]

1897

2610

args = request[2]

1898

2611

kwargs = request[3]

1899

2612

1900

2613

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

1901

2614

funcname)(*args,

1902

**kwargs)))

1903

2615

**kwargs)))

2616

1904

2617

if command == 'getattr':

1905

2618

attrname = request[1]

1906

if callable(client_object.__getattribute__(attrname)):

1907

parent_pipe.send(('function',))

2619

if isinstance(client_object.__getattribute__(attrname),

2620

collections.Callable):

2621

parent_pipe.send(('function', ))

1908

2622

else:

1909

parent_pipe.send(('data', client_object

1910

.__getattribute__(attrname)))

1911

2623

parent_pipe.send((

2624

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

2625

1912

2626

if command == 'setattr':

1913

2627

attrname = request[1]

1914

2628

value = request[2]

1915

2629

setattr(client_object, attrname, value)

1916

2630

1917

2631

return True

1918

2632

1919

2633

2634

def rfc3339_duration_to_delta(duration):

2635

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

2636

2637

>>> rfc3339_duration_to_delta("P7D")

2638

datetime.timedelta(7)

2639

>>> rfc3339_duration_to_delta("PT60S")

2640

datetime.timedelta(0, 60)

2641

>>> rfc3339_duration_to_delta("PT60M")

2642

datetime.timedelta(0, 3600)

2643

>>> rfc3339_duration_to_delta("PT24H")

2644

datetime.timedelta(1)

2645

>>> rfc3339_duration_to_delta("P1W")

2646

datetime.timedelta(7)

2647

>>> rfc3339_duration_to_delta("PT5M30S")

2648

datetime.timedelta(0, 330)

2649

>>> rfc3339_duration_to_delta("P1DT3M20S")

2650

datetime.timedelta(1, 200)

2651

"""

2652

2653

# Parsing an RFC 3339 duration with regular expressions is not

2654

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

2655

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

2656

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

2657

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

2658

# avoid excessive use of external libraries.

2659

2660

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

2661

Token = collections.namedtuple("Token", (

2662

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

2663

# a "group" containing digits

2664

"value", # datetime.timedelta or None

2665

"followers")) # Tokens valid after this token

2666

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

2667

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

2668

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

2669

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

2670

datetime.timedelta(seconds=1),

2671

frozenset((token_end, )))

2672

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

2673

datetime.timedelta(minutes=1),

2674

frozenset((token_second, token_end)))

2675

token_hour = Token(re.compile(r"(\d+)H"),

2676

datetime.timedelta(hours=1),

2677

frozenset((token_minute, token_end)))

2678

token_time = Token(re.compile(r"T"),

2679

None,

2680

frozenset((token_hour, token_minute,

2681

token_second)))

2682

token_day = Token(re.compile(r"(\d+)D"),

2683

datetime.timedelta(days=1),

2684

frozenset((token_time, token_end)))

2685

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

2686

datetime.timedelta(weeks=4),

2687

frozenset((token_day, token_end)))

2688

token_year = Token(re.compile(r"(\d+)Y"),

2689

datetime.timedelta(weeks=52),

2690

frozenset((token_month, token_end)))

2691

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

2692

datetime.timedelta(weeks=1),

2693

frozenset((token_end, )))

2694

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

2695

frozenset((token_year, token_month,

2696

token_day, token_time,

2697

token_week)))

2698

# Define starting values:

2699

# Value so far

2700

value = datetime.timedelta()

2701

found_token = None

2702

# Following valid tokens

2703

followers = frozenset((token_duration, ))

2704

# String left to parse

2705

s = duration

2706

# Loop until end token is found

2707

while found_token is not token_end:

2708

# Search for any currently valid tokens

2709

for token in followers:

2710

match = token.regexp.match(s)

2711

if match is not None:

2712

# Token found

2713

if token.value is not None:

2714

# Value found, parse digits

2715

factor = int(match.group(1), 10)

2716

# Add to value so far

2717

value += factor * token.value

2718

# Strip token from string

2719

s = token.regexp.sub("", s, 1)

2720

# Go to found token

2721

found_token = token

2722

# Set valid next tokens

2723

followers = found_token.followers

2724

break

2725

else:

2726

# No currently valid tokens were found

2727

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

2728

.format(duration))

2729

# End token found

2730

return value

2731

2732

1920

2733

def string_to_delta(interval):

1921

2734

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

1922

2735

1923

2736

>>> string_to_delta('7d')

1924

2737

datetime.timedelta(7)

1925

2738

>>> string_to_delta('60s')

1933

2746

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

1934

2747

datetime.timedelta(0, 330)

1935

2748

"""

2749

2750

try:

2751

return rfc3339_duration_to_delta(interval)

2752

except ValueError:

2753

pass

2754

1936

2755

timevalue = datetime.timedelta(0)

1937

2756

for s in interval.split():

1938

2757

try:

1939

suffix = unicode(s[-1])

2758

suffix = s[-1]

1940

2759

value = int(s[:-1])

1941

2760

if suffix == "d":

1942

2761

delta = datetime.timedelta(value)

1949

2768

elif suffix == "w":

1950

2769

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

1951

2770

else:

1952

raise ValueError("Unknown suffix %r" % suffix)

1953

except (ValueError, IndexError) as e:

2771

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

2772

except IndexError as e:

1954

2773

raise ValueError(*(e.args))

1955

2774

timevalue += delta

1956

2775

return timevalue

1957

2776

1958

2777

1959

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

2778

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

1960

2779

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

1961

2780

1962

2781

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

1963

2782

if os.fork():

1964

2783

sys.exit()

1969

2788

sys.exit()

1970

2789

if not noclose:

1971

2790

# Close all standard open file descriptors

1972

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

2791

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

1973

2792

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

1974

2793

raise OSError(errno.ENODEV,

1975

"%s not a character device"

1976

% os.path.devnull)

2794

"{} not a character device"

2795

.format(os.devnull))

1977

2796

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

1978

2797

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

1979

2798

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

1982

2801

1983

2802

1984

2803

def main():

1985

2804

1986

2805

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

1987

2806

# Parsing of options, both command line and config file

1988

2807

1989

2808

parser = argparse.ArgumentParser()

1990

2809

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

1991

version = "%%(prog)s %s" % version,

2810

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

1992

2811

help="show version number and exit")

1993

2812

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

1994

2813

help="Bind to interface IF")

2000

2819

help="Run self-test")

2001

2820

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

2002

2821

help="Debug mode; run in foreground and log"

2003

" to terminal")

2822

" to terminal", default=None)

2004

2823

parser.add_argument("--debuglevel", metavar="LEVEL",

2005

2824

help="Debug level for stdout output")

2006

2825

parser.add_argument("--priority", help="GnuTLS"

2013

2832

" files")

2014

2833

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

2015

2834

dest="use_dbus", help="Do not provide D-Bus"

2016

" system bus interface")

2835

" system bus interface", default=None)

2017

2836

parser.add_argument("--no-ipv6", action="store_false",

2018

dest="use_ipv6", help="Do not use IPv6")

2837

dest="use_ipv6", help="Do not use IPv6",

2838

default=None)

2019

2839

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

2020

2840

dest="restore", help="Do not restore stored"

2021

" state")

2841

" state", default=None)

2842

parser.add_argument("--socket", type=int,

2843

help="Specify a file descriptor to a network"

2844

" socket to use instead of creating one")

2022

2845

parser.add_argument("--statedir", metavar="DIR",

2023

2846

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

2024

2847

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

2848

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

2849

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

2850

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

2851

default=None)

2852

2025

2853

options = parser.parse_args()

2026

2854

2027

2855

if options.check:

2028

2856

import doctest

2029

doctest.testmod()

2030

sys.exit()

2031

2857

fail_count, test_count = doctest.testmod()

2858

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

2859

2032

2860

# Default values for config file for server-global settings

2033

server_defaults = { "interface": "",

2034

"address": "",

2035

"port": "",

2036

"debug": "False",

2037

"priority":

2038

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

2039

"servicename": "Mandos",

2040

"use_dbus": "True",

2041

"use_ipv6": "True",

2042

"debuglevel": "",

2043

"restore": "True",

2044

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

2045

}

2046

2861

server_defaults = {"interface": "",

2862

"address": "",

2863

"port": "",

2864

"debug": "False",

2865

"priority":

2866

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

2867

":+SIGN-DSA-SHA256",

2868

"servicename": "Mandos",

2869

"use_dbus": "True",

2870

"use_ipv6": "True",

2871

"debuglevel": "",

2872

"restore": "True",

2873

"socket": "",

2874

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

2875

"foreground": "False",

2876

"zeroconf": "True",

2877

}

2878

2047

2879

# Parse config file for server-global settings

2048

2880

server_config = configparser.SafeConfigParser(server_defaults)

2049

2881

del server_defaults

2050

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

2051

"mandos.conf"))

2882

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

2052

2883

# Convert the SafeConfigParser object to a dict

2053

2884

server_settings = server_config.defaults()

2054

2885

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

2055

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

2886

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

2887

"foreground", "zeroconf"):

2056

2888

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

2057

2889

option)

2058

2890

if server_settings["port"]:

2059

2891

server_settings["port"] = server_config.getint("DEFAULT",

2060

2892

"port")

2893

if server_settings["socket"]:

2894

server_settings["socket"] = server_config.getint("DEFAULT",

2895

"socket")

2896

# Later, stdin will, and stdout and stderr might, be dup'ed

2897

# over with an opened os.devnull. But we don't want this to

2898

# happen with a supplied network socket.

2899

if 0 <= server_settings["socket"] <= 2:

2900

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

2901

["socket"])

2061

2902

del server_config

2062

2903

2063

2904

# Override the settings from the config file with command line

2064

2905

# options, if set.

2065

2906

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

2066

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

2067

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

2068

"statedir"):

2907

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

2908

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

2909

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

2069

2910

value = getattr(options, option)

2070

2911

if value is not None:

2071

2912

server_settings[option] = value

2072

2913

del options

2073

2914

# Force all strings to be unicode

2074

2915

for option in server_settings.keys():

2075

if type(server_settings[option]) is str:

2076

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

2916

if isinstance(server_settings[option], bytes):

2917

server_settings[option] = (server_settings[option]

2918

.decode("utf-8"))

2919

# Force all boolean options to be boolean

2920

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

2921

"foreground", "zeroconf"):

2922

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

2923

# Debug implies foreground

2924

if server_settings["debug"]:

2925

server_settings["foreground"] = True

2077

2926

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

2078

2927

2079

2928

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

2080

2929

2930

if (not server_settings["zeroconf"]

2931

and not (server_settings["port"]

2932

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

2933

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

2934

2081

2935

# For convenience

2082

2936

debug = server_settings["debug"]

2083

2937

debuglevel = server_settings["debuglevel"]

2085

2939

use_ipv6 = server_settings["use_ipv6"]

2086

2940

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

2087

2941

stored_state_file)

2088

2942

foreground = server_settings["foreground"]

2943

zeroconf = server_settings["zeroconf"]

2944

2089

2945

if debug:

2090

2946

initlogger(debug, logging.DEBUG)

2091

2947

else:

2094

2950

else:

2095

2951

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

2096

2952

initlogger(debug, level)

2097

2953

2098

2954

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

2099

syslogger.setFormatter(logging.Formatter

2100

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

2101

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

2102

% server_settings["servicename"]))

2103

2955

syslogger.setFormatter(

2956

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

2957

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

2958

server_settings["servicename"])))

2959

2104

2960

# Parse config file with clients

2105

2961

client_config = configparser.SafeConfigParser(Client

2106

2962

.client_defaults)

2107

2963

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

2108

2964

"clients.conf"))

2109

2965

2110

2966

global mandos_dbus_service

2111

2967

mandos_dbus_service = None

2112

2113

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

2114

server_settings["port"]),

2115

ClientHandler,

2116

interface=(server_settings["interface"]

2117

or None),

2118

use_ipv6=use_ipv6,

2119

gnutls_priority=

2120

server_settings["priority"],

2121

use_dbus=use_dbus)

2122

if not debug:

2123

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

2124

try:

2125

pidfile = open(pidfilename, "w")

2126

except IOError:

2127

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

2128

2129

try:

2130

uid = pwd.getpwnam("_mandos").pw_uid

2131

gid = pwd.getpwnam("_mandos").pw_gid

2132

except KeyError:

2133

try:

2134

uid = pwd.getpwnam("mandos").pw_uid

2135

gid = pwd.getpwnam("mandos").pw_gid

2968

2969

socketfd = None

2970

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

2971

socketfd = server_settings["socket"]

2972

tcp_server = MandosServer(

2973

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

2974

ClientHandler,

2975

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

2976

use_ipv6=use_ipv6,

2977

gnutls_priority=server_settings["priority"],

2978

use_dbus=use_dbus,

2979

socketfd=socketfd)

2980

if not foreground:

2981

pidfilename = "/run/mandos.pid"

2982

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

2983

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

2984

pidfile = None

2985

try:

2986

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

2987

except IOError as e:

2988

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

2989

exc_info=e)

2990

2991

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

2992

("mandos", "mandos"),

2993

("nobody", "nogroup")):

2994

try:

2995

uid = pwd.getpwnam(name).pw_uid

2996

gid = pwd.getpwnam(group).pw_gid

2997

break

2136

2998

except KeyError:

2137

try:

2138

uid = pwd.getpwnam("nobody").pw_uid

2139

gid = pwd.getpwnam("nobody").pw_gid

2140

except KeyError:

2141

uid = 65534

2142

gid = 65534

2999

continue

3000

else:

3001

uid = 65534

3002

gid = 65534

2143

3003

try:

2144

3004

os.setgid(gid)

2145

3005

os.setuid(uid)

3006

if debug:

3007

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

3008

gid))

2146

3009

except OSError as error:

2147

if error[0] != errno.EPERM:

2148

raise error

2149

3010

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

3011

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

3012

if error.errno != errno.EPERM:

3013

raise

3014

2150

3015

if debug:

2151

3016

# Enable all possible GnuTLS debugging

2152

3017

2153

3018

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

2154

3019

# - GnuTLS manual

2155

gnutls.library.functions.gnutls_global_set_log_level(11)

2156

2157

@gnutls.library.types.gnutls_log_func

3020

gnutls.global_set_log_level(11)

3021

3022

@gnutls.log_func

2158

3023

def debug_gnutls(level, string):

2159

3024

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

2160

2161

(gnutls.library.functions

2162

.gnutls_global_set_log_function(debug_gnutls))

2163

3025

3026

gnutls.global_set_log_function(debug_gnutls)

3027

2164

3028

# Redirect stdin so all checkers get /dev/null

2165

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

3029

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

2166

3030

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

2167

3031

if null > 2:

2168

3032

os.close(null)

2169

3033

2170

3034

# Need to fork before connecting to D-Bus

2171

if not debug:

3035

if not foreground:

2172

3036

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

2173

3037

daemon()

2174

2175

gobject.threads_init()

2176

3038

3039

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

3040

# to inform GLib that threads will be used.

3041

GLib.threads_init()

3042

2177

3043

global main_loop

2178

3044

# From the Avahi example code

2179

DBusGMainLoop(set_as_default=True )

2180

main_loop = gobject.MainLoop()

3045

DBusGMainLoop(set_as_default=True)

3046

main_loop = GLib.MainLoop()

2181

3047

bus = dbus.SystemBus()

2182

3048

# End of Avahi example code

2183

3049

if use_dbus:

2184

3050

try:

2185

3051

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

2186

bus, do_not_queue=True)

2187

old_bus_name = (dbus.service.BusName

2188

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

2189

do_not_queue=True))

2190

except dbus.exceptions.NameExistsException as e:

2191

logger.error(unicode(e) + ", disabling D-Bus")

3052

bus,

3053

do_not_queue=True)

3054

old_bus_name = dbus.service.BusName(

3055

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

3056

do_not_queue=True)

3057

except dbus.exceptions.DBusException as e:

3058

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

2192

3059

use_dbus = False

2193

3060

server_settings["use_dbus"] = False

2194

3061

tcp_server.use_dbus = False

2195

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

2200

if server_settings["interface"]:

2201

service.interface = (if_nametoindex

2202

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

2203

3062

if zeroconf:

3063

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3064

service = AvahiServiceToSyslog(

3065

name=server_settings["servicename"],

3066

servicetype="_mandos._tcp",

3067

protocol=protocol,

3068

bus=bus)

3069

if server_settings["interface"]:

3070

service.interface = if_nametoindex(

3071

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

3072

2204

3073

global multiprocessing_manager

2205

3074

multiprocessing_manager = multiprocessing.Manager()

2206

3075

2207

3076

client_class = Client

2208

3077

if use_dbus:

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2211

3078

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

3079

2212

3080

client_settings = Client.config_parser(client_config)

2213

3081

old_client_settings = {}

2214

3082

clients_data = {}

2215

3083

3084

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

3085

global wnull

3086

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

3087

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

3088

# mode

3089

if debug or not foreground:

3090

wnull.close()

3091

2216

3092

# Get client data and settings from last running state.

2217

3093

if server_settings["restore"]:

2218

3094

try:

2219

3095

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

2220

clients_data, old_client_settings = (pickle.load

2221

(stored_state))

3096

if sys.version_info.major == 2:

3097

clients_data, old_client_settings = pickle.load(

3098

stored_state)

3099

else:

3100

bytes_clients_data, bytes_old_client_settings = (

3101

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

3102

# Fix bytes to strings

3103

# clients_data

3104

# .keys()

3105

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

3106

if isinstance(key, bytes)

3107

else key): value

3108

for key, value in

3109

bytes_clients_data.items()}

3110

del bytes_clients_data

3111

for key in clients_data:

3112

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

3113

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

3114

for k, v in

3115

clients_data[key].items()}

3116

clients_data[key] = value

3117

# .client_structure

3118

value["client_structure"] = [

3119

(s.decode("utf-8")

3120

if isinstance(s, bytes)

3121

else s) for s in

3122

value["client_structure"]]

3123

# .name & .host

3124

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

3125

if isinstance(value[k], bytes):

3126

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

3127

# old_client_settings

3128

# .keys()

3129

old_client_settings = {

3130

(key.decode("utf-8")

3131

if isinstance(key, bytes)

3132

else key): value

3133

for key, value in

3134

bytes_old_client_settings.items()}

3135

del bytes_old_client_settings

3136

# .host

3137

for value in old_client_settings.values():

3138

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

3139

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

3140

.decode("utf-8"))

2222

3141

os.remove(stored_state_path)

2223

3142

except IOError as e:

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

3143

if e.errno == errno.ENOENT:

3144

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

3145

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

3146

else:

3147

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

3148

exc_info=e)

2227

3149

raise

2228

3150

except EOFError as e:

2229

3151

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

2230

"EOFError: {0}".format(e))

2231

3152

"EOFError:",

3153

exc_info=e)

3154

2232

3155

with PGPEngine() as pgp:

2233

for client_name, client in clients_data.iteritems():

3156

for client_name, client in clients_data.items():

3157

# Skip removed clients

3158

if client_name not in client_settings:

3159

continue

3160

2234

3161

# Decide which value to use after restoring saved state.

2235

3162

# We have three different values: Old config file,

2236

3163

# new config file, and saved state.

2241

3168

# For each value in new config, check if it

2242

3169

# differs from the old config value (Except for

2243

3170

# the "secret" attribute)

2244

if (name != "secret" and

2245

value != old_client_settings[client_name]

2246

[name]):

3171

if (name != "secret"

3172

and (value !=

3173

old_client_settings[client_name][name])):

2247

3174

client[name] = value

2248

3175

except KeyError:

2249

3176

pass

2250

3177

2251

3178

# Clients who has passed its expire date can still be

2252

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

3179

# enabled if its last checker was successful. A Client

3180

# whose checker succeeded before we stored its state is

3181

# assumed to have successfully run all checkers during

3182

# downtime.

2255

3183

if client["enabled"]:

2256

3184

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

2257

3185

if not client["last_checked_ok"]:

2258

3186

logger.warning(

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

3187

"disabling client {} - Client never "

3188

"performed a successful checker".format(

3189

client_name))

2262

3190

client["enabled"] = False

2263

3191

elif client["last_checker_status"] != 0:

2264

3192

logger.warning(

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2268

client["last_checker_status"]))

3193

"disabling client {} - Client last"

3194

" checker failed with error code"

3195

" {}".format(

3196

client_name,

3197

client["last_checker_status"]))

2269

3198

client["enabled"] = False

2270

3199

else:

2271

client["expires"] = (datetime.datetime

2272

.utcnow()

2273

+ client["timeout"])

3200

client["expires"] = (

3201

datetime.datetime.utcnow()

3202

+ client["timeout"])

2274

3203

logger.debug("Last checker succeeded,"

2275

" keeping {0} enabled"

2276

.format(client["name"]))

3204

" keeping {} enabled".format(

3205

client_name))

2277

3206

try:

2278

client["secret"] = (

2279

pgp.decrypt(client["encrypted_secret"],

2280

client_settings[client_name]

2281

["secret"]))

3207

client["secret"] = pgp.decrypt(

3208

client["encrypted_secret"],

3209

client_settings[client_name]["secret"])

2282

3210

except PGPError:

2283

3211

# If decryption fails, we use secret from new settings

2284

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

2285

.format(client_name))

2286

client["secret"] = (

2287

client_settings[client_name]["secret"])

3212

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

3213

client_name))

3214

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

3215

["secret"])

2288

3216

2289

2290

3217

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

2291

3218

for client_name in (set(old_client_settings)

2292

3219

- set(client_settings)):

2295

3222

- set(old_client_settings)):

2296

3223

clients_data[client_name] = client_settings[client_name]

2297

3224

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

3225

# Create all client objects

3226

for client_name, client in clients_data.items():

2300

3227

tcp_server.clients[client_name] = client_class(

2301

name = client_name, settings = client)

2302

3228

name=client_name,

3229

settings=client,

3230

server_settings=server_settings)

3231

2303

3232

if not tcp_server.clients:

2304

3233

logger.warning("No clients defined")

2305

2306

if not debug:

2307

try:

2308

with pidfile:

2309

pid = os.getpid()

2310

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

2311

del pidfile

2312

except IOError:

2313

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

2314

pidfilename, pid)

2315

except NameError:

2316

# "pidfile" was never created

2317

pass

3234

3235

if not foreground:

3236

if pidfile is not None:

3237

pid = os.getpid()

3238

try:

3239

with pidfile:

3240

print(pid, file=pidfile)

3241

except IOError:

3242

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

3243

pidfilename, pid)

3244

del pidfile

2318

3245

del pidfilename

2319

signal.signal(signal.SIGINT, signal.SIG_IGN)

2320

2321

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

2322

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

2323

3246

3247

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

3248

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3249

lambda: main_loop.quit() and False)

3250

2324

3251

if use_dbus:

2325

class MandosDBusService(dbus.service.Object):

3252

3253

@alternate_dbus_interfaces(

3254

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

3255

class MandosDBusService(DBusObjectWithObjectManager):

2326

3256

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

3257

2327

3258

def __init__(self):

2328

3259

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

3260

2329

3261

_interface = "se.recompile.Mandos"

2330

3262

2331

3263

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

2332

3264

def ClientAdded(self, objpath):

2333

3265

"D-Bus signal"

2334

3266

pass

2335

3267

2336

3268

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

2337

3269

def ClientNotFound(self, fingerprint, address):

2338

3270

"D-Bus signal"

2339

3271

pass

2340

3272

3273

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

3274

"true"})

2341

3275

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

2342

3276

def ClientRemoved(self, objpath, name):

2343

3277

"D-Bus signal"

2344

3278

pass

2345

3279

3280

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

3281

"true"})

2346

3282

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

2347

3283

def GetAllClients(self):

2348

3284

"D-Bus method"

2349

return dbus.Array(c.dbus_object_path

2350

for c in

2351

tcp_server.clients.itervalues())

2352

3285

return dbus.Array(c.dbus_object_path for c in

3286

tcp_server.clients.values())

3287

3288

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

3289

"true"})

2353

3290

@dbus.service.method(_interface,

2354

3291

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

2355

3292

def GetAllClientsWithProperties(self):

2356

3293

"D-Bus method"

2357

3294

return dbus.Dictionary(

2358

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

2359

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

3295

{c.dbus_object_path: c.GetAll(

3296

"se.recompile.Mandos.Client")

3297

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

2360

3298

signature="oa{sv}")

2361

3299

2362

3300

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

2363

3301

def RemoveClient(self, object_path):

2364

3302

"D-Bus method"

2365

for c in tcp_server.clients.itervalues():

3303

for c in tcp_server.clients.values():

2366

3304

if c.dbus_object_path == object_path:

2367

3305

del tcp_server.clients[c.name]

2368

3306

c.remove_from_connection()

2369

# Don't signal anything except ClientRemoved

3307

# Don't signal the disabling

2370

3308

c.disable(quiet=True)

2371

# Emit D-Bus signal

2372

self.ClientRemoved(object_path, c.name)

3309

# Emit D-Bus signal for removal

3310

self.client_removed_signal(c)

2373

3311

return

2374

3312

raise KeyError(object_path)

2375

3313

2376

3314

del _interface

2377

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

2381

3315

3316

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3317

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

3318

def GetManagedObjects(self):

3319

"""D-Bus method"""

3320

return dbus.Dictionary(

3321

{client.dbus_object_path:

3322

dbus.Dictionary(

3323

{interface: client.GetAll(interface)

3324

for interface in

3325

client._get_all_interface_names()})

3326

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

3327

3328

def client_added_signal(self, client):

3329

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

3330

if use_dbus:

3331

# New standard signal

3332

self.InterfacesAdded(

3333

client.dbus_object_path,

3334

dbus.Dictionary(

3335

{interface: client.GetAll(interface)

3336

for interface in

3337

client._get_all_interface_names()}))

3338

# Old signal

3339

self.ClientAdded(client.dbus_object_path)

3340

3341

def client_removed_signal(self, client):

3342

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

3343

if use_dbus:

3344

# New standard signal

3345

self.InterfacesRemoved(

3346

client.dbus_object_path,

3347

client._get_all_interface_names())

3348

# Old signal

3349

self.ClientRemoved(client.dbus_object_path,

3350

client.name)

3351

3352

mandos_dbus_service = MandosDBusService()

3353

3354

# Save modules to variables to exempt the modules from being

3355

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

3356

mp = multiprocessing

3357

wn = wnull

3358

2382

3359

def cleanup():

2383

3360

"Cleanup function; run on exit"

2384

service.cleanup()

2385

2386

multiprocessing.active_children()

3361

if zeroconf:

3362

service.cleanup()

3363

3364

mp.active_children()

3365

wn.close()

2387

3366

if not (tcp_server.clients or client_settings):

2388

3367

return

2389

3368

2390

3369

# Store client before exiting. Secrets are encrypted with key

2391

3370

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

2392

3371

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

2393

3372

clients = {}

2394

3373

with PGPEngine() as pgp:

2395

for client in tcp_server.clients.itervalues():

3374

for client in tcp_server.clients.values():

2396

3375

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

2397

3376

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

2398

3377

key)

2399

3378

client_dict = {}

2400

3379

2401

3380

# A list of attributes that can not be pickled

2402

3381

# + secret.

2403

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

2404

"checker"))

2405

for name, typ in (inspect.getmembers

2406

(dbus.service.Object)):

3382

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

3383

"checker", "server_settings"}

3384

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

3385

.Object):

2407

3386

exclude.add(name)

2408

3387

2409

3388

client_dict["encrypted_secret"] = (client

2410

3389

.encrypted_secret)

2411

3390

for attr in client.client_structure:

2412

3391

if attr not in exclude:

2413

3392

client_dict[attr] = getattr(client, attr)

2414

3393

2415

3394

clients[client.name] = client_dict

2416

3395

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

2417

3396

2418

3397

try:

2419

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

with os.fdopen(tempfd, "wb") as stored_state:

2424

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

3398

with tempfile.NamedTemporaryFile(

3399

mode='wb',

3400

suffix=".pickle",

3401

prefix='clients-',

3402

dir=os.path.dirname(stored_state_path),

3403

delete=False) as stored_state:

3404

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

3405

protocol=2)

3406

tempname = stored_state.name

2425

3407

os.rename(tempname, stored_state_path)

2426

3408

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

3409

if not debug:

2430

3410

try:

2431

3411

os.remove(tempname)

2432

3412

except NameError:

2433

3413

pass

2434

if e.errno not in set((errno.ENOENT, errno.EACCES,

2435

errno.EEXIST)):

2436

raise e

2437

3414

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

3415

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

3416

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

3417

else:

3418

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

3419

exc_info=e)

3420

raise

3421

2438

3422

# Delete all clients, and settings from config

2439

3423

while tcp_server.clients:

2440

3424

name, client = tcp_server.clients.popitem()

2441

3425

if use_dbus:

2442

3426

client.remove_from_connection()

2443

# Don't signal anything except ClientRemoved

3427

# Don't signal the disabling

2444

3428

client.disable(quiet=True)

3429

# Emit D-Bus signal for removal

2445

3430

if use_dbus:

2446

# Emit D-Bus signal

2447

mandos_dbus_service.ClientRemoved(client

2448

.dbus_object_path,

2449

client.name)

3431

mandos_dbus_service.client_removed_signal(client)

2450

3432

client_settings.clear()

2451

3433

2452

3434

atexit.register(cleanup)

2453

2454

for client in tcp_server.clients.itervalues():

3435

3436

for client in tcp_server.clients.values():

2455

3437

if use_dbus:

2456

# Emit D-Bus signal

2457

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3438

# Emit D-Bus signal for adding

3439

mandos_dbus_service.client_added_signal(client)

2458

3440

# Need to initiate checking of clients

2459

3441

if client.enabled:

2460

3442

client.init_checker()

2461

3443

2462

3444

tcp_server.enable()

2463

3445

tcp_server.server_activate()

2464

3446

2465

3447

# Find out what port we got

2466

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

3448

if zeroconf:

3449

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

2467

3450

if use_ipv6:

2468

3451

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

2469

" flowinfo %d, scope_id %d"

2470

% tcp_server.socket.getsockname())

3452

" flowinfo %d, scope_id %d",

3453

*tcp_server.socket.getsockname())

2471

3454

else: # IPv4

2472

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

2473

% tcp_server.socket.getsockname())

2474

2475

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

2476

3455

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

3456

*tcp_server.socket.getsockname())

3457

3458

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

3459

2477

3460

try:

2478

# From the Avahi example code

2479

try:

2480

service.activate()

2481

except dbus.exceptions.DBusException as error:

2482

logger.critical("DBusException: %s", error)

2483

cleanup()

2484

sys.exit(1)

2485

# End of Avahi example code

2486

2487

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

2488

lambda *args, **kwargs:

2489

(tcp_server.handle_request

2490

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

2491

3461

if zeroconf:

3462

# From the Avahi example code

3463

try:

3464

service.activate()

3465

except dbus.exceptions.DBusException as error:

3466

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

3467

cleanup()

3468

sys.exit(1)

3469

# End of Avahi example code

3470

3471

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

3472

lambda *args, **kwargs:

3473

(tcp_server.handle_request

3474

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

3475

2492

3476

logger.debug("Starting main loop")

2493

3477

main_loop.run()

2494

3478

except AvahiError as error:

2495

logger.critical("AvahiError: %s", error)

3479

logger.critical("Avahi Error", exc_info=error)

2496

3480

cleanup()

2497

3481

sys.exit(1)

2498

3482

except KeyboardInterrupt:

2503

3487

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

2504

3488

cleanup()

2505

3489

3490

2506

3491

if __name__ == '__main__':

2507

3492

main()