/mandos/trunk : revision 1152

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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import gi

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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 = "1.6.0"

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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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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.6"

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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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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, "w") 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, "w") 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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IF_UNSPEC = -1 # avahi-common/address.h

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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@staticmethod

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def string_array_to_txt_array(t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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class AvahiError(Exception):

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

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self.value = value

218

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

219

def __unicode__(self):

220

return unicode(repr(self.value))

310

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

311

**kwargs)

312

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class AvahiServiceError(AvahiError):

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pass

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317

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

230

323

"""An Avahi (Zeroconf) service.

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324

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Attributes:

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326

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

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Used to optionally bind to the specified interface.

235

328

name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

248

341

"""

249

250

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

251

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

342

343

def __init__(self,

344

interface=avahi.IF_UNSPEC,

345

name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

350

host="",

351

max_renames=32768,

352

protocol=avahi.PROTO_UNSPEC,

353

bus=None):

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354

self.interface = interface

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355

self.name = name

256

356

self.type = servicetype

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365

self.server = None

266

366

self.bus = bus

267

367

self.entry_group_state_changed_match = None

268

269

def rename(self):

368

369

def rename(self, remove=True):

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370

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

271

371

if self.rename_count >= self.max_renames:

272

372

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

273

373

" after %i retries, exiting.",

274

374

self.rename_count)

275

375

raise AvahiServiceError("Too many renames")

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

376

self.name = str(

377

self.server.GetAlternativeServiceName(self.name))

378

self.rename_count += 1

278

379

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

279

380

self.name)

280

self.remove()

381

if remove:

382

self.remove()

281

383

try:

282

384

self.add()

283

385

except dbus.exceptions.DBusException as error:

284

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

285

self.cleanup()

286

os._exit(1)

287

self.rename_count += 1

288

386

if (error.get_dbus_name()

387

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

388

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

389

return self.rename(remove=False)

390

else:

391

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

392

self.cleanup()

393

os._exit(1)

394

289

395

def remove(self):

290

396

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

291

397

if self.entry_group_state_changed_match is not None:

293

399

self.entry_group_state_changed_match = None

294

400

if self.group is not None:

295

401

self.group.Reset()

296

402

297

403

def add(self):

298

404

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

299

405

self.remove()

316

422

dbus.UInt16(self.port),

317

423

avahi.string_array_to_txt_array(self.TXT))

318

424

self.group.Commit()

319

425

320

426

def entry_group_state_changed(self, state, error):

321

427

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

322

428

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

323

429

324

430

if state == avahi.ENTRY_GROUP_ESTABLISHED:

325

431

logger.debug("Zeroconf service established.")

326

432

elif state == avahi.ENTRY_GROUP_COLLISION:

328

434

self.rename()

329

435

elif state == avahi.ENTRY_GROUP_FAILURE:

330

436

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

331

unicode(error))

332

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

333

.format(error))

334

437

str(error))

438

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

439

335

440

def cleanup(self):

336

441

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

337

442

if self.group is not None:

342

447

pass

343

448

self.group = None

344

449

self.remove()

345

450

346

451

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

347

452

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

348

453

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

349

bad_states = { avahi.SERVER_INVALID:

350

"Zeroconf server invalid",

351

avahi.SERVER_REGISTERING: None,

352

avahi.SERVER_COLLISION:

353

"Zeroconf server name collision",

354

avahi.SERVER_FAILURE:

355

"Zeroconf server failure" }

454

bad_states = {

455

avahi.SERVER_INVALID: "Zeroconf server invalid",

456

avahi.SERVER_REGISTERING: None,

457

avahi.SERVER_COLLISION: "Zeroconf server name collision",

458

avahi.SERVER_FAILURE: "Zeroconf server failure",

459

}

356

460

if state in bad_states:

357

461

if bad_states[state] is not None:

358

462

if error is None:

361

465

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

362

466

self.cleanup()

363

467

elif state == avahi.SERVER_RUNNING:

364

self.add()

468

try:

469

self.add()

470

except dbus.exceptions.DBusException as error:

471

if (error.get_dbus_name()

472

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

473

logger.info("Local Zeroconf service name"

474

" collision.")

475

return self.rename(remove=False)

476

else:

477

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

478

self.cleanup()

479

os._exit(1)

365

480

else:

366

481

if error is None:

367

482

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

368

483

else:

369

484

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

370

485

371

486

def activate(self):

372

487

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

373

488

if self.server is None:

377

492

follow_name_owner_changes=True),

378

493

avahi.DBUS_INTERFACE_SERVER)

379

494

self.server.connect_to_signal("StateChanged",

380

self.server_state_changed)

495

self.server_state_changed)

381

496

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

382

497

383

498

384

499

class AvahiServiceToSyslog(AvahiService):

385

def rename(self):

500

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

386

501

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

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

502

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

503

syslogger.setFormatter(logging.Formatter(

504

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

505

.format(self.name)))

392

506

return ret

393

507

394

508

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

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

398

+ (td.seconds * 1000)

399

+ (td.microseconds // 1000))

509

# Pretend that we have a GnuTLS module

510

class gnutls(object):

511

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

512

513

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

514

if library is None:

515

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

516

_library = ctypes.cdll.LoadLibrary(library)

517

del library

518

519

# Unless otherwise indicated, the constants and types below are

520

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

521

522

# Constants

523

E_SUCCESS = 0

524

E_INTERRUPTED = -52

525

E_AGAIN = -28

526

CRT_OPENPGP = 2

527

CRT_RAWPK = 3

528

CLIENT = 2

529

SHUT_RDWR = 0

530

CRD_CERTIFICATE = 1

531

E_NO_CERTIFICATE_FOUND = -49

532

X509_FMT_DER = 0

533

NO_TICKETS = 1<<10

534

ENABLE_RAWPK = 1<<18

535

CTYPE_PEERS = 3

536

KEYID_USE_SHA256 = 1 # gnutls/x509.h

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

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

567

# code is passed, convert it to a string with

568

# gnutls.strerror()

569

self.code = code

570

if message is None and code is not None:

571

message = gnutls.strerror(code)

572

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

573

message, *args)

574

575

class CertificateSecurityError(Error):

576

pass

577

578

# Classes

579

class Credentials(object):

580

def __init__(self):

581

self._c_object = gnutls.certificate_credentials_t()

582

gnutls.certificate_allocate_credentials(

583

ctypes.byref(self._c_object))

584

self.type = gnutls.CRD_CERTIFICATE

585

586

def __del__(self):

587

gnutls.certificate_free_credentials(self._c_object)

588

589

class ClientSession(object):

590

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

591

self._c_object = gnutls.session_t()

592

gnutls_flags = gnutls.CLIENT

593

if gnutls.check_version(b"3.5.6"):

594

gnutls_flags |= gnutls.NO_TICKETS

595

if gnutls.has_rawpk:

596

gnutls_flags |= gnutls.ENABLE_RAWPK

597

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

598

del gnutls_flags

599

gnutls.set_default_priority(self._c_object)

600

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

601

gnutls.handshake_set_private_extensions(self._c_object,

602

True)

603

self.socket = socket

604

if credentials is None:

605

credentials = gnutls.Credentials()

606

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

607

ctypes.cast(credentials._c_object,

608

ctypes.c_void_p))

609

self.credentials = credentials

610

611

def __del__(self):

612

gnutls.deinit(self._c_object)

613

614

def handshake(self):

615

return gnutls.handshake(self._c_object)

616

617

def send(self, data):

618

data = bytes(data)

619

data_len = len(data)

620

while data_len > 0:

621

data_len -= gnutls.record_send(self._c_object,

622

data[-data_len:],

623

data_len)

624

625

def bye(self):

626

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

627

628

# Error handling functions

629

def _error_code(result):

630

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

631

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

632

if result >= 0:

633

return result

634

if result == gnutls.E_NO_CERTIFICATE_FOUND:

635

raise gnutls.CertificateSecurityError(code=result)

636

raise gnutls.Error(code=result)

637

638

def _retry_on_error(result, func, arguments):

639

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

640

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

641

while result < 0:

642

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

643

return _error_code(result)

644

result = func(*arguments)

645

return result

646

647

# Unless otherwise indicated, the function declarations below are

648

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

649

650

# Functions

651

priority_set_direct = _library.gnutls_priority_set_direct

652

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

653

ctypes.POINTER(ctypes.c_char_p)]

654

priority_set_direct.restype = _error_code

655

656

init = _library.gnutls_init

657

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

658

init.restype = _error_code

659

660

set_default_priority = _library.gnutls_set_default_priority

661

set_default_priority.argtypes = [session_t]

662

set_default_priority.restype = _error_code

663

664

record_send = _library.gnutls_record_send

665

record_send.argtypes = [session_t, ctypes.c_void_p,

666

ctypes.c_size_t]

667

record_send.restype = ctypes.c_ssize_t

668

record_send.errcheck = _retry_on_error

669

670

certificate_allocate_credentials = (

671

_library.gnutls_certificate_allocate_credentials)

672

certificate_allocate_credentials.argtypes = [

673

ctypes.POINTER(certificate_credentials_t)]

674

certificate_allocate_credentials.restype = _error_code

675

676

certificate_free_credentials = (

677

_library.gnutls_certificate_free_credentials)

678

certificate_free_credentials.argtypes = [

679

certificate_credentials_t]

680

certificate_free_credentials.restype = None

681

682

handshake_set_private_extensions = (

683

_library.gnutls_handshake_set_private_extensions)

684

handshake_set_private_extensions.argtypes = [session_t,

685

ctypes.c_int]

686

handshake_set_private_extensions.restype = None

687

688

credentials_set = _library.gnutls_credentials_set

689

credentials_set.argtypes = [session_t, credentials_type_t,

690

ctypes.c_void_p]

691

credentials_set.restype = _error_code

692

693

strerror = _library.gnutls_strerror

694

strerror.argtypes = [ctypes.c_int]

695

strerror.restype = ctypes.c_char_p

696

697

certificate_type_get = _library.gnutls_certificate_type_get

698

certificate_type_get.argtypes = [session_t]

699

certificate_type_get.restype = _error_code

700

701

certificate_get_peers = _library.gnutls_certificate_get_peers

702

certificate_get_peers.argtypes = [session_t,

703

ctypes.POINTER(ctypes.c_uint)]

704

certificate_get_peers.restype = ctypes.POINTER(datum_t)

705

706

global_set_log_level = _library.gnutls_global_set_log_level

707

global_set_log_level.argtypes = [ctypes.c_int]

708

global_set_log_level.restype = None

709

710

global_set_log_function = _library.gnutls_global_set_log_function

711

global_set_log_function.argtypes = [log_func]

712

global_set_log_function.restype = None

713

714

deinit = _library.gnutls_deinit

715

deinit.argtypes = [session_t]

716

deinit.restype = None

717

718

handshake = _library.gnutls_handshake

719

handshake.argtypes = [session_t]

720

handshake.restype = _error_code

721

handshake.errcheck = _retry_on_error

722

723

transport_set_ptr = _library.gnutls_transport_set_ptr

724

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

725

transport_set_ptr.restype = None

726

727

bye = _library.gnutls_bye

728

bye.argtypes = [session_t, close_request_t]

729

bye.restype = _error_code

730

bye.errcheck = _retry_on_error

731

732

check_version = _library.gnutls_check_version

733

check_version.argtypes = [ctypes.c_char_p]

734

check_version.restype = ctypes.c_char_p

735

736

_need_version = b"3.3.0"

737

if check_version(_need_version) is None:

738

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

739

.format(_need_version))

740

741

_tls_rawpk_version = b"3.6.6"

742

has_rawpk = bool(check_version(_tls_rawpk_version))

743

744

if has_rawpk:

745

# Types

746

class pubkey_st(ctypes.Structure):

747

_fields = []

748

pubkey_t = ctypes.POINTER(pubkey_st)

749

750

x509_crt_fmt_t = ctypes.c_int

751

752

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

753

pubkey_init = _library.gnutls_pubkey_init

754

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

755

pubkey_init.restype = _error_code

756

757

pubkey_import = _library.gnutls_pubkey_import

758

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

759

x509_crt_fmt_t]

760

pubkey_import.restype = _error_code

761

762

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

763

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

764

ctypes.POINTER(ctypes.c_ubyte),

765

ctypes.POINTER(ctypes.c_size_t)]

766

pubkey_get_key_id.restype = _error_code

767

768

pubkey_deinit = _library.gnutls_pubkey_deinit

769

pubkey_deinit.argtypes = [pubkey_t]

770

pubkey_deinit.restype = None

771

else:

772

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

773

774

openpgp_crt_init = _library.gnutls_openpgp_crt_init

775

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

776

openpgp_crt_init.restype = _error_code

777

778

openpgp_crt_import = _library.gnutls_openpgp_crt_import

779

openpgp_crt_import.argtypes = [openpgp_crt_t,

780

ctypes.POINTER(datum_t),

781

openpgp_crt_fmt_t]

782

openpgp_crt_import.restype = _error_code

783

784

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

785

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

786

ctypes.POINTER(ctypes.c_uint)]

787

openpgp_crt_verify_self.restype = _error_code

788

789

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

790

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

791

openpgp_crt_deinit.restype = None

792

793

openpgp_crt_get_fingerprint = (

794

_library.gnutls_openpgp_crt_get_fingerprint)

795

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

796

ctypes.c_void_p,

797

ctypes.POINTER(

798

ctypes.c_size_t)]

799

openpgp_crt_get_fingerprint.restype = _error_code

800

801

if check_version(b"3.6.4"):

802

certificate_type_get2 = _library.gnutls_certificate_type_get2

803

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

804

certificate_type_get2.restype = _error_code

805

806

# Remove non-public functions

807

del _error_code, _retry_on_error

808

809

810

def call_pipe(connection, # : multiprocessing.Connection

811

func, *args, **kwargs):

812

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

813

814

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

815

return value on the provided multiprocessing.Connection.

816

"""

817

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

818

connection.close()

400

819

401

820

402

821

class Client(object):

403

822

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

404

823

405

824

Attributes:

406

825

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

407

826

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

408

827

approval_duration: datetime.timedelta(); Duration of one approval

409

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

410

to see if the client lives.

411

'None' if no process is running.

412

checker_callback_tag: a gobject event source tag, or None

828

checker: multiprocessing.Process(); a running checker process used

829

to see if the client lives. 'None' if no process is

830

running.

831

checker_callback_tag: a GLib event source tag, or None

413

832

checker_command: string; External command which is run to check

414

833

if client lives. %() expansions are done at

415

834

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

416

835

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

417

checker_initiator_tag: a gobject event source tag, or None

836

checker_initiator_tag: a GLib event source tag, or None

418

837

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

419

838

client_structure: Object describing what attributes a client has

420

839

and is used for storing the client at exit

421

840

current_checker_command: string; current running checker_command

422

disable_initiator_tag: a gobject event source tag, or None

841

disable_initiator_tag: a GLib event source tag, or None

423

842

enabled: bool()

424

843

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

425

uniquely identify the client

844

uniquely identify an OpenPGP client

845

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

846

a client using raw public keys

426

847

host: string; available for use by the checker command

427

848

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

428

849

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

430

851

last_checker_status: integer between 0 and 255 reflecting exit

431

852

status of last checker. -1 reflects crashed

432

853

checker, -2 means no checker completed yet.

854

last_checker_signal: The signal which killed the last checker, if

855

last_checker_status is -1

433

856

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

434

857

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

435

858

D-Bus identifiers

440

863

runtime_expansions: Allowed attributes for runtime expansion.

441

864

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

442

865

disabled, or None

866

server_settings: The server_settings dict from main()

443

867

"""

444

868

445

869

runtime_expansions = ("approval_delay", "approval_duration",

446

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

870

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

447

871

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

448

872

"last_approval_request", "last_checked_ok",

449

873

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

450

client_defaults = { "timeout": "PT5M",

451

"extended_timeout": "PT15M",

452

"interval": "PT2M",

453

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

454

"host": "",

455

"approval_delay": "PT0S",

456

"approval_duration": "PT1S",

457

"approved_by_default": "True",

458

"enabled": "True",

459

}

460

461

def timeout_milliseconds(self):

462

"Return the 'timeout' attribute in milliseconds"

463

return timedelta_to_milliseconds(self.timeout)

464

465

def extended_timeout_milliseconds(self):

466

"Return the 'extended_timeout' attribute in milliseconds"

467

return timedelta_to_milliseconds(self.extended_timeout)

468

469

def interval_milliseconds(self):

470

"Return the 'interval' attribute in milliseconds"

471

return timedelta_to_milliseconds(self.interval)

472

473

def approval_delay_milliseconds(self):

474

return timedelta_to_milliseconds(self.approval_delay)

475

874

client_defaults = {

875

"timeout": "PT5M",

876

"extended_timeout": "PT15M",

877

"interval": "PT2M",

878

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

879

"host": "",

880

"approval_delay": "PT0S",

881

"approval_duration": "PT1S",

882

"approved_by_default": "True",

883

"enabled": "True",

884

}

885

476

886

@staticmethod

477

887

def config_parser(config):

478

888

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

485

895

for client_name in config.sections():

486

896

section = dict(config.items(client_name))

487

897

client = settings[client_name] = {}

488

898

489

899

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

490

900

# Reformat values from string types to Python types

491

901

client["approved_by_default"] = config.getboolean(

492

902

client_name, "approved_by_default")

493

903

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

494

904

"enabled")

495

905

906

# Uppercase and remove spaces from key_id and fingerprint

907

# for later comparison purposes with return value from the

908

# key_id() and fingerprint() functions

909

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

910

.replace(" ", ""))

496

911

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

497

912

.replace(" ", ""))

498

913

if "secret" in section:

499

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

914

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

915

.encode("utf-8"),

916

"base64")

500

917

elif "secfile" in section:

501

918

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

502

919

(section["secfile"])),

503

920

"rb") as secfile:

504

921

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

505

922

else:

506

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

923

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

507

924

.format(section))

508

925

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

509

926

client["extended_timeout"] = string_to_delta(

517

934

client["last_approval_request"] = None

518

935

client["last_checked_ok"] = None

519

936

client["last_checker_status"] = -2

520

937

521

938

return settings

522

523

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

939

940

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

524

941

self.name = name

942

if server_settings is None:

943

server_settings = {}

944

self.server_settings = server_settings

525

945

# adding all client settings

526

for setting, value in settings.iteritems():

946

for setting, value in settings.items():

527

947

setattr(self, setting, value)

528

948

529

949

if self.enabled:

530

950

if not hasattr(self, "last_enabled"):

531

951

self.last_enabled = datetime.datetime.utcnow()

535

955

else:

536

956

self.last_enabled = None

537

957

self.expires = None

538

958

539

959

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

540

# Uppercase and remove spaces from fingerprint for later

541

# comparison purposes with return value from the fingerprint()

542

# function

960

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

543

961

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

544

962

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

545

963

datetime.datetime.utcnow())

546

964

547

965

# attributes specific for this server instance

548

966

self.checker = None

549

967

self.checker_initiator_tag = None

552

970

self.current_checker_command = None

553

971

self.approved = None

554

972

self.approvals_pending = 0

555

self.changedstate = (multiprocessing_manager

556

.Condition(multiprocessing_manager

557

.Lock()))

558

self.client_structure = [attr for attr in

559

self.__dict__.iterkeys()

973

self.changedstate = multiprocessing_manager.Condition(

974

multiprocessing_manager.Lock())

975

self.client_structure = [attr

976

for attr in self.__dict__.keys()

560

977

if not attr.startswith("_")]

561

978

self.client_structure.append("client_structure")

562

563

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

564

lambda obj:

565

isinstance(obj,

566

property)):

979

980

for name, t in inspect.getmembers(

981

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

567

982

if not name.startswith("_"):

568

983

self.client_structure.append(name)

569

984

570

985

# Send notice to process children that client state has changed

571

986

def send_changedstate(self):

572

987

with self.changedstate:

573

988

self.changedstate.notify_all()

574

989

575

990

def enable(self):

576

991

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

577

992

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

582

997

self.last_enabled = datetime.datetime.utcnow()

583

998

self.init_checker()

584

999

self.send_changedstate()

585

1000

586

1001

def disable(self, quiet=True):

587

1002

"""Disable this client."""

588

1003

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

590

1005

if not quiet:

591

1006

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

592

1007

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

593

gobject.source_remove(self.disable_initiator_tag)

1008

GLib.source_remove(self.disable_initiator_tag)

594

1009

self.disable_initiator_tag = None

595

1010

self.expires = None

596

1011

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

597

gobject.source_remove(self.checker_initiator_tag)

1012

GLib.source_remove(self.checker_initiator_tag)

598

1013

self.checker_initiator_tag = None

599

1014

self.stop_checker()

600

1015

self.enabled = False

601

1016

if not quiet:

602

1017

self.send_changedstate()

603

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

1018

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

604

1019

return False

605

1020

606

1021

def __del__(self):

607

1022

self.disable()

608

1023

609

1024

def init_checker(self):

610

1025

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

611

1026

# and every interval from then on.

612

1027

if self.checker_initiator_tag is not None:

613

gobject.source_remove(self.checker_initiator_tag)

614

self.checker_initiator_tag = (gobject.timeout_add

615

(self.interval_milliseconds(),

616

self.start_checker))

1028

GLib.source_remove(self.checker_initiator_tag)

1029

self.checker_initiator_tag = GLib.timeout_add(

1030

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

1031

self.start_checker)

617

1032

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

618

1033

if self.disable_initiator_tag is not None:

619

gobject.source_remove(self.disable_initiator_tag)

620

self.disable_initiator_tag = (gobject.timeout_add

621

(self.timeout_milliseconds(),

622

self.disable))

1034

GLib.source_remove(self.disable_initiator_tag)

1035

self.disable_initiator_tag = GLib.timeout_add(

1036

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

623

1037

# Also start a new checker *right now*.

624

1038

self.start_checker()

625

626

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

1039

1040

def checker_callback(self, source, condition, connection,

1041

command):

627

1042

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

1043

# Read return code from connection (see call_pipe)

1044

returncode = connection.recv()

1045

connection.close()

1046

self.checker.join()

628

1047

self.checker_callback_tag = None

629

1048

self.checker = None

630

if os.WIFEXITED(condition):

631

self.last_checker_status = os.WEXITSTATUS(condition)

1049

1050

if returncode >= 0:

1051

self.last_checker_status = returncode

1052

self.last_checker_signal = None

632

1053

if self.last_checker_status == 0:

633

1054

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

634

1055

vars(self))

635

1056

self.checked_ok()

636

1057

else:

637

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

638

vars(self))

1058

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

639

1059

else:

640

1060

self.last_checker_status = -1

1061

self.last_checker_signal = -returncode

641

1062

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

642

1063

vars(self))

643

1064

return False

1065

644

1066

def checked_ok(self):

645

1067

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

646

1068

self.last_checked_ok = datetime.datetime.utcnow()

647

1069

self.last_checker_status = 0

1070

self.last_checker_signal = None

648

1071

self.bump_timeout()

649

1072

650

1073

def bump_timeout(self, timeout=None):

651

1074

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

652

1075

if timeout is None:

653

1076

timeout = self.timeout

654

1077

if self.disable_initiator_tag is not None:

655

gobject.source_remove(self.disable_initiator_tag)

1078

GLib.source_remove(self.disable_initiator_tag)

656

1079

self.disable_initiator_tag = None

657

1080

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

658

self.disable_initiator_tag = (gobject.timeout_add

659

(timedelta_to_milliseconds

660

(timeout), self.disable))

1081

self.disable_initiator_tag = GLib.timeout_add(

1082

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

661

1083

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

662

1084

663

1085

def need_approval(self):

664

1086

self.last_approval_request = datetime.datetime.utcnow()

665

1087

666

1088

def start_checker(self):

667

1089

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

668

1090

669

1091

If a checker already exists, leave it running and do

670

1092

nothing."""

671

1093

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

676

1098

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

677

1099

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

678

1100

# should be.

679

680

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

681

try:

682

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

683

except (AttributeError, OSError) as error:

684

if (isinstance(error, OSError)

685

and error.errno != errno.ECHILD):

686

raise error

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

1101

1102

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

1103

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

1104

self.checker.join()

1105

self.checker = None

693

1106

# Start a new checker if needed

694

1107

if self.checker is None:

695

1108

# Escape attributes for the shell

696

escaped_attrs = dict(

697

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

698

for attr in

699

self.runtime_expansions)

1109

escaped_attrs = {

1110

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

1111

for attr in self.runtime_expansions}

700

1112

try:

701

1113

command = self.checker_command % escaped_attrs

702

1114

except TypeError as error:

703

1115

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

704

self.checker_command, exc_info=error)

705

return True # Try again later

1116

self.checker_command,

1117

exc_info=error)

1118

return True # Try again later

706

1119

self.current_checker_command = command

707

try:

708

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

709

command, self.name)

710

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

711

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

712

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

713

# always replaced by /dev/null.)

714

self.checker = subprocess.Popen(command,

715

close_fds=True,

716

shell=True, cwd="/")

717

except OSError as error:

718

logger.error("Failed to start subprocess",

719

exc_info=error)

720

self.checker_callback_tag = (gobject.child_watch_add

721

(self.checker.pid,

722

self.checker_callback,

723

data=command))

724

# The checker may have completed before the gobject

725

# watch was added. Check for this.

726

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

727

if pid:

728

gobject.source_remove(self.checker_callback_tag)

729

self.checker_callback(pid, status, command)

730

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

1120

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

1121

self.name)

1122

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

1123

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

1124

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

1125

# always replaced by /dev/null.)

1126

# The exception is when not debugging but nevertheless

1127

# running in the foreground; use the previously

1128

# created wnull.

1129

popen_args = {"close_fds": True,

1130

"shell": True,

1131

"cwd": "/"}

1132

if (not self.server_settings["debug"]

1133

and self.server_settings["foreground"]):

1134

popen_args.update({"stdout": wnull,

1135

"stderr": wnull})

1136

pipe = multiprocessing.Pipe(duplex=False)

1137

self.checker = multiprocessing.Process(

1138

target=call_pipe,

1139

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

1140

kwargs=popen_args)

1141

self.checker.start()

1142

self.checker_callback_tag = GLib.io_add_watch(

1143

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

1144

self.checker_callback, pipe[0], command)

1145

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

731

1146

return True

732

1147

733

1148

def stop_checker(self):

734

1149

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

735

1150

if self.checker_callback_tag:

736

gobject.source_remove(self.checker_callback_tag)

1151

GLib.source_remove(self.checker_callback_tag)

737

1152

self.checker_callback_tag = None

738

1153

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

739

1154

return

740

1155

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

741

try:

742

self.checker.terminate()

743

#time.sleep(0.5)

744

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

745

# self.checker.kill()

746

except OSError as error:

747

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

748

raise

1156

self.checker.terminate()

749

1157

self.checker = None

750

1158

751

1159

752

def dbus_service_property(dbus_interface, signature="v",

753

access="readwrite", byte_arrays=False):

1160

def dbus_service_property(dbus_interface,

1161

signature="v",

1162

access="readwrite",

1163

byte_arrays=False):

754

1164

"""Decorators for marking methods of a DBusObjectWithProperties to

755

1165

become properties on the D-Bus.

756

1166

757

1167

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

758

1168

and with one argument by "Set".

759

1169

760

1170

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

761

1171

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

762

1172

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

765

1175

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

766

1176

if byte_arrays and signature != "ay":

767

1177

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

768

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

1178

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

1179

769

1180

def decorator(func):

770

1181

func._dbus_is_property = True

771

1182

func._dbus_interface = dbus_interface

774

1185

func._dbus_name = func.__name__

775

1186

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

776

1187

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

777

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1188

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

778

1189

return func

1190

779

1191

return decorator

780

1192

781

1193

782

1194

def dbus_interface_annotations(dbus_interface):

783

1195

"""Decorator for marking functions returning interface annotations

784

1196

785

1197

Usage:

786

1198

787

1199

@dbus_interface_annotations("org.example.Interface")

788

1200

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

789

1201

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

790

1202

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

791

1203

"false"}

792

1204

"""

1205

793

1206

def decorator(func):

794

1207

func._dbus_is_interface = True

795

1208

func._dbus_interface = dbus_interface

796

1209

func._dbus_name = dbus_interface

797

1210

return func

1211

798

1212

return decorator

799

1213

800

1214

801

1215

def dbus_annotations(annotations):

802

1216

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

803

1217

Usage:

804

1218

1219

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

1220

"org.freedesktop.DBus.Property."

1221

"EmitsChangedSignal": "false"})

805

1222

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

806

1223

access="r")

807

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

808

"org.freedesktop.DBus.Property."

809

"EmitsChangedSignal": "false"})

810

1224

def Property_dbus_property(self):

811

1225

return dbus.Boolean(False)

1226

1227

See also the DBusObjectWithAnnotations class.

812

1228

"""

1229

813

1230

def decorator(func):

814

1231

func._dbus_annotations = annotations

815

1232

return func

1233

816

1234

return decorator

817

1235

818

1236

819

1237

class DBusPropertyException(dbus.exceptions.DBusException):

820

1238

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

821

1239

"""

822

def __unicode__(self):

823

return unicode(str(self))

1240

pass

824

1241

825

1242

826

1243

class DBusPropertyAccessException(DBusPropertyException):

835

1252

pass

836

1253

837

1254

838

class DBusObjectWithProperties(dbus.service.Object):

839

"""A D-Bus object with properties.

840

841

Classes inheriting from this can use the dbus_service_property

842

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

843

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

1255

class DBusObjectWithAnnotations(dbus.service.Object):

1256

"""A D-Bus object with annotations.

1257

1258

Classes inheriting from this can use the dbus_annotations

1259

decorator to add annotations to methods or signals.

844

1260

"""

845

1261

846

1262

@staticmethod

847

1263

def _is_dbus_thing(thing):

848

1264

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

849

1265

850

1266

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

851

1267

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

852

1268

"""

853

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

1269

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

854

1270

False)

855

1271

856

1272

def _get_all_dbus_things(self, thing):

857

1273

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

858

1274

"""

859

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

860

name),

1275

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

861

1276

athing.__get__(self))

862

1277

for cls in self.__class__.__mro__

863

1278

for name, athing in

864

inspect.getmembers(cls,

865

self._is_dbus_thing(thing)))

866

1279

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

1280

1281

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1282

out_signature="s",

1283

path_keyword='object_path',

1284

connection_keyword='connection')

1285

def Introspect(self, object_path, connection):

1286

"""Overloading of standard D-Bus method.

1287

1288

Inserts annotation tags on methods and signals.

1289

"""

1290

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

1291

connection)

1292

try:

1293

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

1294

1295

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

1296

# Add annotation tags

1297

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

1298

for tag in if_tag.getElementsByTagName(typ):

1299

annots = dict()

1300

for name, prop in (self.

1301

_get_all_dbus_things(typ)):

1302

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

1303

and prop._dbus_interface

1304

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

1305

annots.update(getattr(

1306

prop, "_dbus_annotations", {}))

1307

for name, value in annots.items():

1308

ann_tag = document.createElement(

1309

"annotation")

1310

ann_tag.setAttribute("name", name)

1311

ann_tag.setAttribute("value", value)

1312

tag.appendChild(ann_tag)

1313

# Add interface annotation tags

1314

for annotation, value in dict(

1315

itertools.chain.from_iterable(

1316

annotations().items()

1317

for name, annotations

1318

in self._get_all_dbus_things("interface")

1319

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

1320

)).items():

1321

ann_tag = document.createElement("annotation")

1322

ann_tag.setAttribute("name", annotation)

1323

ann_tag.setAttribute("value", value)

1324

if_tag.appendChild(ann_tag)

1325

# Fix argument name for the Introspect method itself

1326

if (if_tag.getAttribute("name")

1327

== dbus.INTROSPECTABLE_IFACE):

1328

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

1329

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

1330

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

1331

if (arg.getAttribute("direction")

1332

== "out"):

1333

arg.setAttribute("name",

1334

"xml_data")

1335

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

1336

document.unlink()

1337

except (AttributeError, xml.dom.DOMException,

1338

xml.parsers.expat.ExpatError) as error:

1339

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

1340

exc_info=error)

1341

return xmlstring

1342

1343

1344

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1345

"""A D-Bus object with properties.

1346

1347

Classes inheriting from this can use the dbus_service_property

1348

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

1349

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

1350

"""

1351

867

1352

def _get_dbus_property(self, interface_name, property_name):

868

1353

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

869

1354

property with the specified name and interface.

870

1355

"""

871

for cls in self.__class__.__mro__:

872

for name, value in (inspect.getmembers

873

(cls,

874

self._is_dbus_thing("property"))):

1356

for cls in self.__class__.__mro__:

1357

for name, value in inspect.getmembers(

1358

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

875

1359

if (value._dbus_name == property_name

876

1360

and value._dbus_interface == interface_name):

877

1361

return value.__get__(self)

878

1362

879

1363

# No such property

880

raise DBusPropertyNotFound(self.dbus_object_path + ":"

881

+ interface_name + "."

882

+ property_name)

883

884

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

1364

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

1365

self.dbus_object_path, interface_name, property_name))

1366

1367

@classmethod

1368

def _get_all_interface_names(cls):

1369

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

1370

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

1371

"_dbus_interface", None)

1372

for x in (inspect.getmro(cls))

1373

for attr in dir(x))

1374

if name is not None)

1375

1376

@dbus.service.method(dbus.PROPERTIES_IFACE,

1377

in_signature="ss",

885

1378

out_signature="v")

886

1379

def Get(self, interface_name, property_name):

887

1380

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

893

1386

if not hasattr(value, "variant_level"):

894

1387

return value

895

1388

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

896

1389

897

1390

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

898

1391

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

899

1392

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

905

1398

# The byte_arrays option is not supported yet on

906

1399

# signatures other than "ay".

907

1400

if prop._dbus_signature != "ay":

908

raise ValueError

1401

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

1402

"'ay' signature {!r}"

1403

.format(prop._dbus_signature))

909

1404

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

910

1405

for byte in value))

911

1406

prop(value)

912

913

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

1407

1408

@dbus.service.method(dbus.PROPERTIES_IFACE,

1409

in_signature="s",

914

1410

out_signature="a{sv}")

915

1411

def GetAll(self, interface_name):

916

1412

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

917

1413

standard.

918

1414

919

1415

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

920

1416

"""

921

1417

properties = {}

931

1427

if not hasattr(value, "variant_level"):

932

1428

properties[name] = value

933

1429

continue

934

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

935

value.variant_level+1)

1430

properties[name] = type(value)(

1431

value, variant_level=value.variant_level + 1)

936

1432

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

937

1433

1434

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

1435

def PropertiesChanged(self, interface_name, changed_properties,

1436

invalidated_properties):

1437

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

1438

standard.

1439

"""

1440

pass

1441

938

1442

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

939

1443

out_signature="s",

940

1444

path_keyword='object_path',

941

1445

connection_keyword='connection')

942

1446

def Introspect(self, object_path, connection):

943

1447

"""Overloading of standard D-Bus method.

944

1448

945

1449

Inserts property tags and interface annotation tags.

946

1450

"""

947

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

948

connection)

1451

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1452

object_path,

1453

connection)

949

1454

try:

950

1455

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

1456

951

1457

def make_tag(document, name, prop):

952

1458

e = document.createElement("property")

953

1459

e.setAttribute("name", name)

954

1460

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

955

1461

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

956

1462

return e

1463

957

1464

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

958

1465

# Add property tags

959

1466

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

962

1469

if prop._dbus_interface

963

1470

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

964

1471

if_tag.appendChild(tag)

965

# Add annotation tags

966

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

967

for tag in if_tag.getElementsByTagName(typ):

968

annots = dict()

969

for name, prop in (self.

970

_get_all_dbus_things(typ)):

971

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

972

and prop._dbus_interface

973

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

974

annots.update(getattr

975

(prop,

976

"_dbus_annotations",

977

{}))

978

for name, value in annots.iteritems():

979

ann_tag = document.createElement(

980

"annotation")

981

ann_tag.setAttribute("name", name)

982

ann_tag.setAttribute("value", value)

983

tag.appendChild(ann_tag)

984

# Add interface annotation tags

985

for annotation, value in dict(

986

itertools.chain.from_iterable(

987

annotations().iteritems()

988

for name, annotations in

989

self._get_all_dbus_things("interface")

990

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

991

)).iteritems():

992

ann_tag = document.createElement("annotation")

993

ann_tag.setAttribute("name", annotation)

994

ann_tag.setAttribute("value", value)

995

if_tag.appendChild(ann_tag)

1472

# Add annotation tags for properties

1473

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

1474

annots = dict()

1475

for name, prop in self._get_all_dbus_things(

1476

"property"):

1477

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

1478

and prop._dbus_interface

1479

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

1480

annots.update(getattr(

1481

prop, "_dbus_annotations", {}))

1482

for name, value in annots.items():

1483

ann_tag = document.createElement(

1484

"annotation")

1485

ann_tag.setAttribute("name", name)

1486

ann_tag.setAttribute("value", value)

1487

tag.appendChild(ann_tag)

996

1488

# Add the names to the return values for the

997

1489

# "org.freedesktop.DBus.Properties" methods

998

1490

if (if_tag.getAttribute("name")

1017

1509

return xmlstring

1018

1510

1019

1511

1512

try:

1513

dbus.OBJECT_MANAGER_IFACE

1514

except AttributeError:

1515

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

1516

1517

1518

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1519

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

1520

1521

Classes inheriting from this exposes the standard

1522

GetManagedObjects call and the InterfacesAdded and

1523

InterfacesRemoved signals on the standard

1524

"org.freedesktop.DBus.ObjectManager" interface.

1525

1526

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

1527

manually.

1528

"""

1529

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1530

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

1531

def GetManagedObjects(self):

1532

"""This function must be overridden"""

1533

raise NotImplementedError()

1534

1535

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def InterfacesAdded(self, object_path, interfaces_and_properties):

1538

pass

1539

1540

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

1541

def InterfacesRemoved(self, object_path, interfaces):

1542

pass

1543

1544

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1545

out_signature="s",

1546

path_keyword='object_path',

1547

connection_keyword='connection')

1548

def Introspect(self, object_path, connection):

1549

"""Overloading of standard D-Bus method.

1550

1551

Override return argument name of GetManagedObjects to be

1552

"objpath_interfaces_and_properties"

1553

"""

1554

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1555

object_path,

1556

connection)

1557

try:

1558

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

1559

1560

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

1561

# Fix argument name for the GetManagedObjects method

1562

if (if_tag.getAttribute("name")

1563

== dbus.OBJECT_MANAGER_IFACE):

1564

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

1565

if (cn.getAttribute("name")

1566

== "GetManagedObjects"):

1567

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

1568

if (arg.getAttribute("direction")

1569

== "out"):

1570

arg.setAttribute(

1571

"name",

1572

"objpath_interfaces"

1573

"_and_properties")

1574

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

1575

document.unlink()

1576

except (AttributeError, xml.dom.DOMException,

1577

xml.parsers.expat.ExpatError) as error:

1578

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

1579

exc_info=error)

1580

return xmlstring

1581

1582

1020

1583

def datetime_to_dbus(dt, variant_level=0):

1021

1584

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

1022

1585

if dt is None:

1023

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

1024

return dbus.String(dt.isoformat(),

1025

variant_level=variant_level)

1586

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

1587

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

1026

1588

1027

1589

1028

1590

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1030

1592

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

1031

1593

interface names according to the "alt_interface_names" mapping.

1032

1594

Usage:

1033

1595

1034

1596

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

1035

1597

"net.example.AlternateInterface"})

1036

1598

class SampleDBusObject(dbus.service.Object):

1037

1599

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

1038

1600

def SampleDBusMethod():

1039

1601

pass

1040

1602

1041

1603

The above "SampleDBusMethod" on "SampleDBusObject" will be

1042

1604

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

1043

1605

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

1044

1606

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

1045

1607

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

1046

1608

1047

1609

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

1048

1610

(from DBusObjectWithProperties) and interfaces (from the

1049

1611

dbus_interface_annotations decorator).

1050

1612

"""

1613

1051

1614

def wrapper(cls):

1052

1615

for orig_interface_name, alt_interface_name in (

1053

alt_interface_names.iteritems()):

1616

alt_interface_names.items()):

1054

1617

attr = {}

1055

1618

interface_names = set()

1056

1619

# Go though all attributes of the class

1058

1621

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

1059

1622

# with the wrong interface name

1060

1623

if (not hasattr(attribute, "_dbus_interface")

1061

or not attribute._dbus_interface

1062

.startswith(orig_interface_name)):

1624

or not attribute._dbus_interface.startswith(

1625

orig_interface_name)):

1063

1626

continue

1064

1627

# Create an alternate D-Bus interface name based on

1065

1628

# the current name

1066

alt_interface = (attribute._dbus_interface

1067

.replace(orig_interface_name,

1068

alt_interface_name))

1629

alt_interface = attribute._dbus_interface.replace(

1630

orig_interface_name, alt_interface_name)

1069

1631

interface_names.add(alt_interface)

1070

1632

# Is this a D-Bus signal?

1071

1633

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

1072

# Extract the original non-method function by

1073

# black magic

1074

nonmethod_func = (dict(

1634

# Extract the original non-method undecorated

1635

# function by black magic

1636

if sys.version_info.major == 2:

1637

nonmethod_func = (dict(

1075

1638

zip(attribute.func_code.co_freevars,

1076

attribute.__closure__))["func"]

1077

.cell_contents)

1639

attribute.__closure__))

1640

["func"].cell_contents)

1641

else:

1642

nonmethod_func = (dict(

1643

zip(attribute.__code__.co_freevars,

1644

attribute.__closure__))

1645

["func"].cell_contents)

1078

1646

# Create a new, but exactly alike, function

1079

1647

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

1080

1648

# with the alternate D-Bus interface name

1081

new_function = (dbus.service.signal

1082

(alt_interface,

1083

attribute._dbus_signature)

1084

(types.FunctionType(

1085

nonmethod_func.func_code,

1086

nonmethod_func.func_globals,

1087

nonmethod_func.func_name,

1088

nonmethod_func.func_defaults,

1089

nonmethod_func.func_closure)))

1649

new_function = copy_function(nonmethod_func)

1650

new_function = (dbus.service.signal(

1651

alt_interface,

1652

attribute._dbus_signature)(new_function))

1090

1653

# Copy annotations, if any

1091

1654

try:

1092

new_function._dbus_annotations = (

1093

dict(attribute._dbus_annotations))

1655

new_function._dbus_annotations = dict(

1656

attribute._dbus_annotations)

1094

1657

except AttributeError:

1095

1658

pass

1659

1096

1660

# Define a creator of a function to call both the

1097

1661

# original and alternate functions, so both the

1098

1662

# original and alternate signals gets sent when

1101

1665

"""This function is a scope container to pass

1102

1666

func1 and func2 to the "call_both" function

1103

1667

outside of its arguments"""

1668

1669

@functools.wraps(func2)

1104

1670

def call_both(*args, **kwargs):

1105

1671

"""This function will emit two D-Bus

1106

1672

signals by calling func1 and func2"""

1107

1673

func1(*args, **kwargs)

1108

1674

func2(*args, **kwargs)

1675

# Make wrapper function look like a D-Bus

1676

# signal

1677

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

1678

if name.startswith("_dbus_"):

1679

setattr(call_both, name, attr)

1680

1109

1681

return call_both

1110

1682

# Create the "call_both" function and add it to

1111

1683

# the class

1116

1688

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

1117

1689

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

1118

1690

# to the class.

1119

attr[attrname] = (dbus.service.method

1120

(alt_interface,

1121

attribute._dbus_in_signature,

1122

attribute._dbus_out_signature)

1123

(types.FunctionType

1124

(attribute.func_code,

1125

attribute.func_globals,

1126

attribute.func_name,

1127

attribute.func_defaults,

1128

attribute.func_closure)))

1691

attr[attrname] = (

1692

dbus.service.method(

1693

alt_interface,

1694

attribute._dbus_in_signature,

1695

attribute._dbus_out_signature)

1696

(copy_function(attribute)))

1129

1697

# Copy annotations, if any

1130

1698

try:

1131

attr[attrname]._dbus_annotations = (

1132

dict(attribute._dbus_annotations))

1699

attr[attrname]._dbus_annotations = dict(

1700

attribute._dbus_annotations)

1133

1701

except AttributeError:

1134

1702

pass

1135

1703

# Is this a D-Bus property?

1138

1706

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

1139

1707

# property with the alternate D-Bus interface

1140

1708

# name. Add it to the class.

1141

attr[attrname] = (dbus_service_property

1142

(alt_interface,

1143

attribute._dbus_signature,

1144

attribute._dbus_access,

1145

attribute

1146

._dbus_get_args_options

1147

["byte_arrays"])

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1709

attr[attrname] = (dbus_service_property(

1710

alt_interface, attribute._dbus_signature,

1711

attribute._dbus_access,

1712

attribute._dbus_get_args_options

1713

["byte_arrays"])

1714

(copy_function(attribute)))

1154

1715

# Copy annotations, if any

1155

1716

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1717

attr[attrname]._dbus_annotations = dict(

1718

attribute._dbus_annotations)

1158

1719

except AttributeError:

1159

1720

pass

1160

1721

# Is this a D-Bus interface?

1163

1724

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

1164

1725

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

1165

1726

# to the class.

1166

attr[attrname] = (dbus_interface_annotations

1167

(alt_interface)

1168

(types.FunctionType

1169

(attribute.func_code,

1170

attribute.func_globals,

1171

attribute.func_name,

1172

attribute.func_defaults,

1173

attribute.func_closure)))

1727

attr[attrname] = (

1728

dbus_interface_annotations(alt_interface)

1729

(copy_function(attribute)))

1174

1730

if deprecate:

1175

1731

# Deprecate all alternate interfaces

1176

iname="_AlternateDBusNames_interface_annotation{0}"

1732

iname = "_AlternateDBusNames_interface_annotation{}"

1177

1733

for interface_name in interface_names:

1734

1178

1735

@dbus_interface_annotations(interface_name)

1179

1736

def func(self):

1180

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

1181

"true" }

1737

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

1738

"true"}

1182

1739

# Find an unused name

1183

1740

for aname in (iname.format(i)

1184

1741

for i in itertools.count()):

1188

1745

if interface_names:

1189

1746

# Replace the class with a new subclass of it with

1190

1747

# methods, signals, etc. as created above.

1191

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

1192

(cls,), attr)

1748

if sys.version_info.major == 2:

1749

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

1750

(cls, ), attr)

1751

else:

1752

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

1753

(cls, ), attr)

1193

1754

return cls

1755

1194

1756

return wrapper

1195

1757

1196

1758

1197

1759

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

1198

"se.bsnet.fukt.Mandos"})

1760

"se.bsnet.fukt.Mandos"})

1199

1761

class ClientDBus(Client, DBusObjectWithProperties):

1200

1762

"""A Client class using D-Bus

1201

1763

1202

1764

Attributes:

1203

1765

dbus_object_path: dbus.ObjectPath

1204

1766

bus: dbus.SystemBus()

1205

1767

"""

1206

1768

1207

1769

runtime_expansions = (Client.runtime_expansions

1208

+ ("dbus_object_path",))

1209

1770

+ ("dbus_object_path", ))

1771

1772

_interface = "se.recompile.Mandos.Client"

1773

1210

1774

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

1211

1212

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

1775

1776

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

1213

1777

self.bus = bus

1214

1778

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

1215

1779

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

1216

1780

# the D-Bus

1217

client_object_name = unicode(self.name).translate(

1781

client_object_name = str(self.name).translate(

1218

1782

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

1219

1783

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

1220

self.dbus_object_path = (dbus.ObjectPath

1221

("/clients/" + client_object_name))

1784

self.dbus_object_path = dbus.ObjectPath(

1785

"/clients/" + client_object_name)

1222

1786

DBusObjectWithProperties.__init__(self, self.bus,

1223

1787

self.dbus_object_path)

1224

1225

def notifychangeproperty(transform_func,

1226

dbus_name, type_func=lambda x: x,

1227

variant_level=1):

1788

1789

def notifychangeproperty(transform_func, dbus_name,

1790

type_func=lambda x: x,

1791

variant_level=1,

1792

invalidate_only=False,

1793

_interface=_interface):

1228

1794

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

1229

1795

its changes to DBus.

1230

1796

1231

1797

transform_fun: Function that takes a value and a variant_level

1232

1798

and transforms it to a D-Bus type.

1233

1799

dbus_name: D-Bus name of the variable

1235

1801

to the D-Bus. Default: no transform

1236

1802

variant_level: D-Bus variant level. Default: 1

1237

1803

"""

1238

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

1804

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

1805

1239

1806

def setter(self, value):

1240

1807

if hasattr(self, "dbus_object_path"):

1241

1808

if (not hasattr(self, attrname) or

1242

1809

type_func(getattr(self, attrname, None))

1243

1810

!= type_func(value)):

1244

dbus_value = transform_func(type_func(value),

1245

variant_level

1246

=variant_level)

1247

self.PropertyChanged(dbus.String(dbus_name),

1248

dbus_value)

1811

if invalidate_only:

1812

self.PropertiesChanged(

1813

_interface, dbus.Dictionary(),

1814

dbus.Array((dbus_name, )))

1815

else:

1816

dbus_value = transform_func(

1817

type_func(value),

1818

variant_level=variant_level)

1819

self.PropertyChanged(dbus.String(dbus_name),

1820

dbus_value)

1821

self.PropertiesChanged(

1822

_interface,

1823

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

1824

dbus_value}),

1825

dbus.Array())

1249

1826

setattr(self, attrname, value)

1250

1827

1251

1828

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

1252

1829

1253

1830

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1254

1831

approvals_pending = notifychangeproperty(dbus.Boolean,

1255

1832

"ApprovalPending",

1256

type_func = bool)

1833

type_func=bool)

1257

1834

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

1258

1835

last_enabled = notifychangeproperty(datetime_to_dbus,

1259

1836

"LastEnabled")

1260

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

1261

type_func = lambda checker:

1262

checker is not None)

1837

checker = notifychangeproperty(

1838

dbus.Boolean, "CheckerRunning",

1839

type_func=lambda checker: checker is not None)

1263

1840

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1264

1841

"LastCheckedOK")

1265

1842

last_checker_status = notifychangeproperty(dbus.Int16,

1268

1845

datetime_to_dbus, "LastApprovalRequest")

1269

1846

approved_by_default = notifychangeproperty(dbus.Boolean,

1270

1847

"ApprovedByDefault")

1271

approval_delay = notifychangeproperty(dbus.UInt64,

1272

"ApprovalDelay",

1273

type_func =

1274

timedelta_to_milliseconds)

1848

approval_delay = notifychangeproperty(

1849

dbus.UInt64, "ApprovalDelay",

1850

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

1275

1851

approval_duration = notifychangeproperty(

1276

1852

dbus.UInt64, "ApprovalDuration",

1277

type_func = timedelta_to_milliseconds)

1853

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

1278

1854

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

1279

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

1280

type_func =

1281

timedelta_to_milliseconds)

1855

timeout = notifychangeproperty(

1856

dbus.UInt64, "Timeout",

1857

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

1282

1858

extended_timeout = notifychangeproperty(

1283

1859

dbus.UInt64, "ExtendedTimeout",

1284

type_func = timedelta_to_milliseconds)

1285

interval = notifychangeproperty(dbus.UInt64,

1286

"Interval",

1287

type_func =

1288

timedelta_to_milliseconds)

1860

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

1861

interval = notifychangeproperty(

1862

dbus.UInt64, "Interval",

1863

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

1289

1864

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

1290

1865

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

1866

invalidate_only=True)

1867

1291

1868

del notifychangeproperty

1292

1869

1293

1870

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

1294

1871

try:

1295

1872

self.remove_from_connection()

1298

1875

if hasattr(DBusObjectWithProperties, "__del__"):

1299

1876

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

1300

1877

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

1301

1302

def checker_callback(self, pid, condition, command,

1303

*args, **kwargs):

1304

self.checker_callback_tag = None

1305

self.checker = None

1306

if os.WIFEXITED(condition):

1307

exitstatus = os.WEXITSTATUS(condition)

1878

1879

def checker_callback(self, source, condition,

1880

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

1881

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

1882

connection, command, *args,

1883

**kwargs)

1884

exitstatus = self.last_checker_status

1885

if exitstatus >= 0:

1308

1886

# Emit D-Bus signal

1309

1887

self.CheckerCompleted(dbus.Int16(exitstatus),

1310

dbus.Int64(condition),

1888

# This is specific to GNU libC

1889

dbus.Int64(exitstatus << 8),

1311

1890

dbus.String(command))

1312

1891

else:

1313

1892

# Emit D-Bus signal

1314

1893

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

1315

dbus.Int64(condition),

1894

dbus.Int64(

1895

# This is specific to GNU libC

1896

(exitstatus << 8)

1897

| self.last_checker_signal),

1316

1898

dbus.String(command))

1317

1318

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

1319

*args, **kwargs)

1320

1899

return ret

1900

1321

1901

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

1322

old_checker = self.checker

1323

if self.checker is not None:

1324

old_checker_pid = self.checker.pid

1325

else:

1326

old_checker_pid = None

1902

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

1327

1903

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

1328

1904

# Only if new checker process was started

1329

1905

if (self.checker is not None

1331

1907

# Emit D-Bus signal

1332

1908

self.CheckerStarted(self.current_checker_command)

1333

1909

return r

1334

1910

1335

1911

def _reset_approved(self):

1336

1912

self.approved = None

1337

1913

return False

1338

1914

1339

1915

def approve(self, value=True):

1340

1916

self.approved = value

1341

gobject.timeout_add(timedelta_to_milliseconds

1342

(self.approval_duration),

1343

self._reset_approved)

1917

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

1918

* 1000), self._reset_approved)

1344

1919

self.send_changedstate()

1345

1346

## D-Bus methods, signals & properties

1347

_interface = "se.recompile.Mandos.Client"

1348

1349

## Interfaces

1350

1351

@dbus_interface_annotations(_interface)

1352

def _foo(self):

1353

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

1354

"false"}

1355

1356

## Signals

1357

1920

1921

# D-Bus methods, signals & properties

1922

1923

# Interfaces

1924

1925

# Signals

1926

1358

1927

# CheckerCompleted - signal

1359

1928

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

1360

1929

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

1361

1930

"D-Bus signal"

1362

1931

pass

1363

1932

1364

1933

# CheckerStarted - signal

1365

1934

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

1366

1935

def CheckerStarted(self, command):

1367

1936

"D-Bus signal"

1368

1937

pass

1369

1938

1370

1939

# PropertyChanged - signal

1940

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

1371

1941

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

1372

1942

def PropertyChanged(self, property, value):

1373

1943

"D-Bus signal"

1374

1944

pass

1375

1945

1376

1946

# GotSecret - signal

1377

1947

@dbus.service.signal(_interface)

1378

1948

def GotSecret(self):

1381

1951

server to mandos-client

1382

1952

"""

1383

1953

pass

1384

1954

1385

1955

# Rejected - signal

1386

1956

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

1387

1957

def Rejected(self, reason):

1388

1958

"D-Bus signal"

1389

1959

pass

1390

1960

1391

1961

# NeedApproval - signal

1392

1962

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

1393

1963

def NeedApproval(self, timeout, default):

1394

1964

"D-Bus signal"

1395

1965

return self.need_approval()

1396

1397

## Methods

1398

1966

1967

# Methods

1968

1399

1969

# Approve - method

1400

1970

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

1401

1971

def Approve(self, value):

1402

1972

self.approve(value)

1403

1973

1404

1974

# CheckedOK - method

1405

1975

@dbus.service.method(_interface)

1406

1976

def CheckedOK(self):

1407

1977

self.checked_ok()

1408

1978

1409

1979

# Enable - method

1980

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

1410

1981

@dbus.service.method(_interface)

1411

1982

def Enable(self):

1412

1983

"D-Bus method"

1413

1984

self.enable()

1414

1985

1415

1986

# StartChecker - method

1987

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

1416

1988

@dbus.service.method(_interface)

1417

1989

def StartChecker(self):

1418

1990

"D-Bus method"

1419

1991

self.start_checker()

1420

1992

1421

1993

# Disable - method

1994

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

1422

1995

@dbus.service.method(_interface)

1423

1996

def Disable(self):

1424

1997

"D-Bus method"

1425

1998

self.disable()

1426

1999

1427

2000

# StopChecker - method

2001

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

1428

2002

@dbus.service.method(_interface)

1429

2003

def StopChecker(self):

1430

2004

self.stop_checker()

1431

1432

## Properties

1433

2005

2006

# Properties

2007

1434

2008

# ApprovalPending - property

1435

2009

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

1436

2010

def ApprovalPending_dbus_property(self):

1437

2011

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

1438

2012

1439

2013

# ApprovedByDefault - property

1440

@dbus_service_property(_interface, signature="b",

2014

@dbus_service_property(_interface,

2015

signature="b",

1441

2016

access="readwrite")

1442

2017

def ApprovedByDefault_dbus_property(self, value=None):

1443

2018

if value is None: # get

1444

2019

return dbus.Boolean(self.approved_by_default)

1445

2020

self.approved_by_default = bool(value)

1446

2021

1447

2022

# ApprovalDelay - property

1448

@dbus_service_property(_interface, signature="t",

2023

@dbus_service_property(_interface,

2024

signature="t",

1449

2025

access="readwrite")

1450

2026

def ApprovalDelay_dbus_property(self, value=None):

1451

2027

if value is None: # get

1452

return dbus.UInt64(self.approval_delay_milliseconds())

2028

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

2029

* 1000)

1453

2030

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

1454

2031

1455

2032

# ApprovalDuration - property

1456

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1457

2035

access="readwrite")

1458

2036

def ApprovalDuration_dbus_property(self, value=None):

1459

2037

if value is None: # get

1460

return dbus.UInt64(timedelta_to_milliseconds(

1461

self.approval_duration))

2038

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

2039

* 1000)

1462

2040

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

1463

2041

1464

2042

# Name - property

2043

@dbus_annotations(

2044

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

1465

2045

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

1466

2046

def Name_dbus_property(self):

1467

2047

return dbus.String(self.name)

1468

2048

2049

# KeyID - property

2050

@dbus_annotations(

2051

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

2052

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

2053

def KeyID_dbus_property(self):

2054

return dbus.String(self.key_id)

2055

1469

2056

# Fingerprint - property

2057

@dbus_annotations(

2058

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

1470

2059

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

1471

2060

def Fingerprint_dbus_property(self):

1472

2061

return dbus.String(self.fingerprint)

1473

2062

1474

2063

# Host - property

1475

@dbus_service_property(_interface, signature="s",

2064

@dbus_service_property(_interface,

2065

signature="s",

1476

2066

access="readwrite")

1477

2067

def Host_dbus_property(self, value=None):

1478

2068

if value is None: # get

1479

2069

return dbus.String(self.host)

1480

self.host = unicode(value)

1481

2070

self.host = str(value)

2071

1482

2072

# Created - property

2073

@dbus_annotations(

2074

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

1483

2075

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

1484

2076

def Created_dbus_property(self):

1485

2077

return datetime_to_dbus(self.created)

1486

2078

1487

2079

# LastEnabled - property

1488

2080

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

1489

2081

def LastEnabled_dbus_property(self):

1490

2082

return datetime_to_dbus(self.last_enabled)

1491

2083

1492

2084

# Enabled - property

1493

@dbus_service_property(_interface, signature="b",

2085

@dbus_service_property(_interface,

2086

signature="b",

1494

2087

access="readwrite")

1495

2088

def Enabled_dbus_property(self, value=None):

1496

2089

if value is None: # get

1499

2092

self.enable()

1500

2093

else:

1501

2094

self.disable()

1502

2095

1503

2096

# LastCheckedOK - property

1504

@dbus_service_property(_interface, signature="s",

2097

@dbus_service_property(_interface,

2098

signature="s",

1505

2099

access="readwrite")

1506

2100

def LastCheckedOK_dbus_property(self, value=None):

1507

2101

if value is not None:

1508

2102

self.checked_ok()

1509

2103

return

1510

2104

return datetime_to_dbus(self.last_checked_ok)

1511

2105

1512

2106

# LastCheckerStatus - property

1513

@dbus_service_property(_interface, signature="n",

1514

access="read")

2107

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

1515

2108

def LastCheckerStatus_dbus_property(self):

1516

2109

return dbus.Int16(self.last_checker_status)

1517

2110

1518

2111

# Expires - property

1519

2112

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

1520

2113

def Expires_dbus_property(self):

1521

2114

return datetime_to_dbus(self.expires)

1522

2115

1523

2116

# LastApprovalRequest - property

1524

2117

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

1525

2118

def LastApprovalRequest_dbus_property(self):

1526

2119

return datetime_to_dbus(self.last_approval_request)

1527

2120

1528

2121

# Timeout - property

1529

@dbus_service_property(_interface, signature="t",

2122

@dbus_service_property(_interface,

2123

signature="t",

1530

2124

access="readwrite")

1531

2125

def Timeout_dbus_property(self, value=None):

1532

2126

if value is None: # get

1533

return dbus.UInt64(self.timeout_milliseconds())

2127

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

1534

2128

old_timeout = self.timeout

1535

2129

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

1536

2130

# Reschedule disabling

1544

2138

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

1545

2139

is None):

1546

2140

return

1547

gobject.source_remove(self.disable_initiator_tag)

1548

self.disable_initiator_tag = (

1549

gobject.timeout_add(

1550

timedelta_to_milliseconds(self.expires - now),

1551

self.disable))

1552

2141

GLib.source_remove(self.disable_initiator_tag)

2142

self.disable_initiator_tag = GLib.timeout_add(

2143

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

2144

self.disable)

2145

1553

2146

# ExtendedTimeout - property

1554

@dbus_service_property(_interface, signature="t",

2147

@dbus_service_property(_interface,

2148

signature="t",

1555

2149

access="readwrite")

1556

2150

def ExtendedTimeout_dbus_property(self, value=None):

1557

2151

if value is None: # get

1558

return dbus.UInt64(self.extended_timeout_milliseconds())

2152

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

2153

* 1000)

1559

2154

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

1560

2155

1561

2156

# Interval - property

1562

@dbus_service_property(_interface, signature="t",

2157

@dbus_service_property(_interface,

2158

signature="t",

1563

2159

access="readwrite")

1564

2160

def Interval_dbus_property(self, value=None):

1565

2161

if value is None: # get

1566

return dbus.UInt64(self.interval_milliseconds())

2162

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

1567

2163

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

1568

2164

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

1569

2165

return

1570

2166

if self.enabled:

1571

2167

# Reschedule checker run

1572

gobject.source_remove(self.checker_initiator_tag)

1573

self.checker_initiator_tag = (gobject.timeout_add

1574

(value, self.start_checker))

1575

self.start_checker() # Start one now, too

1576

2168

GLib.source_remove(self.checker_initiator_tag)

2169

self.checker_initiator_tag = GLib.timeout_add(

2170

value, self.start_checker)

2171

self.start_checker() # Start one now, too

2172

1577

2173

# Checker - property

1578

@dbus_service_property(_interface, signature="s",

2174

@dbus_service_property(_interface,

2175

signature="s",

1579

2176

access="readwrite")

1580

2177

def Checker_dbus_property(self, value=None):

1581

2178

if value is None: # get

1582

2179

return dbus.String(self.checker_command)

1583

self.checker_command = unicode(value)

1584

2180

self.checker_command = str(value)

2181

1585

2182

# CheckerRunning - property

1586

@dbus_service_property(_interface, signature="b",

2183

@dbus_service_property(_interface,

2184

signature="b",

1587

2185

access="readwrite")

1588

2186

def CheckerRunning_dbus_property(self, value=None):

1589

2187

if value is None: # get

1592

2190

self.start_checker()

1593

2191

else:

1594

2192

self.stop_checker()

1595

2193

1596

2194

# ObjectPath - property

2195

@dbus_annotations(

2196

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

2197

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

1597

2198

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

1598

2199

def ObjectPath_dbus_property(self):

1599

return self.dbus_object_path # is already a dbus.ObjectPath

1600

2200

return self.dbus_object_path # is already a dbus.ObjectPath

2201

1601

2202

# Secret = property

1602

@dbus_service_property(_interface, signature="ay",

1603

access="write", byte_arrays=True)

2203

@dbus_annotations(

2204

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

2205

"invalidates"})

2206

@dbus_service_property(_interface,

2207

signature="ay",

2208

access="write",

2209

byte_arrays=True)

1604

2210

def Secret_dbus_property(self, value):

1605

self.secret = str(value)

1606

2211

self.secret = bytes(value)

2212

1607

2213

del _interface

1608

2214

1609

2215

1610

2216

class ProxyClient(object):

1611

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

2217

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

1612

2218

self._pipe = child_pipe

1613

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

2219

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

1614

2220

if not self._pipe.recv():

1615

raise KeyError()

1616

2221

raise KeyError(key_id or fpr)

2222

1617

2223

def __getattribute__(self, name):

1618

2224

if name == '_pipe':

1619

2225

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

1622

2228

if data[0] == 'data':

1623

2229

return data[1]

1624

2230

if data[0] == 'function':

2231

1625

2232

def func(*args, **kwargs):

1626

2233

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

1627

2234

return self._pipe.recv()[1]

2235

1628

2236

return func

1629

2237

1630

2238

def __setattr__(self, name, value):

1631

2239

if name == '_pipe':

1632

2240

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

1635

2243

1636

2244

class ClientHandler(socketserver.BaseRequestHandler, object):

1637

2245

"""A class to handle client connections.

1638

2246

1639

2247

Instantiated once for each connection to handle it.

1640

2248

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

1641

2249

1642

2250

def handle(self):

1643

2251

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

1644

2252

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

1645

unicode(self.client_address))

2253

str(self.client_address))

1646

2254

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

1647

2255

self.server.child_pipe.fileno())

1648

1649

session = (gnutls.connection

1650

.ClientSession(self.request,

1651

gnutls.connection

1652

.X509Credentials()))

1653

1654

# Note: gnutls.connection.X509Credentials is really a

1655

# generic GnuTLS certificate credentials object so long as

1656

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

1657

# here despite using OpenPGP certificates.

1658

1659

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

1660

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

1661

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

1662

# "+DHE-DSS"))

2256

2257

session = gnutls.ClientSession(self.request)

2258

2259

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

2260

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

2261

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

2262

# "+DHE-DSS"))

1663

2263

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

1664

2264

priority = self.server.gnutls_priority

1665

2265

if priority is None:

1666

2266

priority = "NORMAL"

1667

(gnutls.library.functions

1668

.gnutls_priority_set_direct(session._c_object,

1669

priority, None))

1670

2267

gnutls.priority_set_direct(session._c_object,

2268

priority.encode("utf-8"),

2269

None)

2270

1671

2271

# Start communication using the Mandos protocol

1672

2272

# Get protocol number

1673

2273

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

1674

2274

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

1675

2275

try:

1676

2276

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

1677

raise RuntimeError

2277

raise RuntimeError(line)

1678

2278

except (ValueError, IndexError, RuntimeError) as error:

1679

2279

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

1680

2280

return

1681

2281

1682

2282

# Start GnuTLS connection

1683

2283

try:

1684

2284

session.handshake()

1685

except gnutls.errors.GNUTLSError as error:

2285

except gnutls.Error as error:

1686

2286

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

1687

2287

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

1688

2288

# established. Just abandon the request.

1689

2289

return

1690

2290

logger.debug("Handshake succeeded")

1691

2291

1692

2292

approval_required = False

1693

2293

try:

1694

try:

1695

fpr = self.fingerprint(self.peer_certificate

1696

(session))

1697

except (TypeError,

1698

gnutls.errors.GNUTLSError) as error:

1699

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

1700

return

1701

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

1702

1703

try:

1704

client = ProxyClient(child_pipe, fpr,

2294

if gnutls.has_rawpk:

2295

fpr = b""

2296

try:

2297

key_id = self.key_id(

2298

self.peer_certificate(session))

2299

except (TypeError, gnutls.Error) as error:

2300

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

2301

return

2302

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

2303

2304

else:

2305

key_id = b""

2306

try:

2307

fpr = self.fingerprint(

2308

self.peer_certificate(session))

2309

except (TypeError, gnutls.Error) as error:

2310

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

2311

return

2312

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

2313

2314

try:

2315

client = ProxyClient(child_pipe, key_id, fpr,

1705

2316

self.client_address)

1706

2317

except KeyError:

1707

2318

return

1708

2319

1709

2320

if client.approval_delay:

1710

2321

delay = client.approval_delay

1711

2322

client.approvals_pending += 1

1712

2323

approval_required = True

1713

2324

1714

2325

while True:

1715

2326

if not client.enabled:

1716

2327

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

1717

client.name)

2328

client.name)

1718

2329

if self.server.use_dbus:

1719

2330

# Emit D-Bus signal

1720

2331

client.Rejected("Disabled")

1721

2332

return

1722

2333

1723

2334

if client.approved or not client.approval_delay:

1724

#We are approved or approval is disabled

2335

# We are approved or approval is disabled

1725

2336

break

1726

2337

elif client.approved is None:

1727

2338

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

1729

2340

if self.server.use_dbus:

1730

2341

# Emit D-Bus signal

1731

2342

client.NeedApproval(

1732

client.approval_delay_milliseconds(),

1733

client.approved_by_default)

2343

client.approval_delay.total_seconds()

2344

* 1000, client.approved_by_default)

1734

2345

else:

1735

2346

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

1736

2347

client.name)

1738

2349

# Emit D-Bus signal

1739

2350

client.Rejected("Denied")

1740

2351

return

1741

1742

#wait until timeout or approved

2352

2353

# wait until timeout or approved

1743

2354

time = datetime.datetime.now()

1744

2355

client.changedstate.acquire()

1745

client.changedstate.wait(

1746

float(timedelta_to_milliseconds(delay)

1747

/ 1000))

2356

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

1748

2357

client.changedstate.release()

1749

2358

time2 = datetime.datetime.now()

1750

2359

if (time2 - time) >= delay:

1760

2369

break

1761

2370

else:

1762

2371

delay -= time2 - time

1763

1764

sent_size = 0

1765

while sent_size < len(client.secret):

1766

try:

1767

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

1768

except gnutls.errors.GNUTLSError as error:

1769

logger.warning("gnutls send failed",

1770

exc_info=error)

1771

return

1772

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

1773

sent, len(client.secret)

1774

- (sent_size + sent))

1775

sent_size += sent

1776

2372

2373

try:

2374

session.send(client.secret)

2375

except gnutls.Error as error:

2376

logger.warning("gnutls send failed",

2377

exc_info=error)

2378

return

2379

1777

2380

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

1778

2381

# bump the timeout using extended_timeout

1779

2382

client.bump_timeout(client.extended_timeout)

1780

2383

if self.server.use_dbus:

1781

2384

# Emit D-Bus signal

1782

2385

client.GotSecret()

1783

2386

1784

2387

finally:

1785

2388

if approval_required:

1786

2389

client.approvals_pending -= 1

1787

2390

try:

1788

2391

session.bye()

1789

except gnutls.errors.GNUTLSError as error:

2392

except gnutls.Error as error:

1790

2393

logger.warning("GnuTLS bye failed",

1791

2394

exc_info=error)

1792

2395

1793

2396

@staticmethod

1794

2397

def peer_certificate(session):

1795

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

1796

# If not an OpenPGP certificate...

1797

if (gnutls.library.functions

1798

.gnutls_certificate_type_get(session._c_object)

1799

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1800

# ...do the normal thing

1801

return session.peer_certificate

2398

"Return the peer's certificate as a bytestring"

2399

try:

2400

cert_type = gnutls.certificate_type_get2(session._c_object,

2401

gnutls.CTYPE_PEERS)

2402

except AttributeError:

2403

cert_type = gnutls.certificate_type_get(session._c_object)

2404

if gnutls.has_rawpk:

2405

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2406

else:

2407

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2408

# If not a valid certificate type...

2409

if cert_type not in valid_cert_types:

2410

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

2411

valid_cert_types)

2412

# ...return invalid data

2413

return b""

1802

2414

list_size = ctypes.c_uint(1)

1803

cert_list = (gnutls.library.functions

1804

.gnutls_certificate_get_peers

2415

cert_list = (gnutls.certificate_get_peers

1805

2416

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

1806

2417

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

1807

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

1808

" certificate")

2418

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

1809

2419

if list_size.value == 0:

1810

2420

return None

1811

2421

cert = cert_list[0]

1812

2422

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

1813

2423

2424

@staticmethod

2425

def key_id(certificate):

2426

"Convert a certificate bytestring to a hexdigit key ID"

2427

# New GnuTLS "datum" with the public key

2428

datum = gnutls.datum_t(

2429

ctypes.cast(ctypes.c_char_p(certificate),

2430

ctypes.POINTER(ctypes.c_ubyte)),

2431

ctypes.c_uint(len(certificate)))

2432

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

2433

# New empty GnuTLS certificate

2434

pubkey = gnutls.pubkey_t()

2435

gnutls.pubkey_init(ctypes.byref(pubkey))

2436

# Import the raw public key into the certificate

2437

gnutls.pubkey_import(pubkey,

2438

ctypes.byref(datum),

2439

gnutls.X509_FMT_DER)

2440

# New buffer for the key ID

2441

buf = ctypes.create_string_buffer(32)

2442

buf_len = ctypes.c_size_t(len(buf))

2443

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

2444

gnutls.pubkey_get_key_id(pubkey,

2445

gnutls.KEYID_USE_SHA256,

2446

ctypes.cast(ctypes.byref(buf),

2447

ctypes.POINTER(ctypes.c_ubyte)),

2448

ctypes.byref(buf_len))

2449

# Deinit the certificate

2450

gnutls.pubkey_deinit(pubkey)

2451

2452

# Convert the buffer to a Python bytestring

2453

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

2454

# Convert the bytestring to hexadecimal notation

2455

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

2456

return hex_key_id

2457

1814

2458

@staticmethod

1815

2459

def fingerprint(openpgp):

1816

2460

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1817

2461

# New GnuTLS "datum" with the OpenPGP public key

1818

datum = (gnutls.library.types

1819

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

1820

ctypes.POINTER

1821

(ctypes.c_ubyte)),

1822

ctypes.c_uint(len(openpgp))))

2462

datum = gnutls.datum_t(

2463

ctypes.cast(ctypes.c_char_p(openpgp),

2464

ctypes.POINTER(ctypes.c_ubyte)),

2465

ctypes.c_uint(len(openpgp)))

1823

2466

# New empty GnuTLS certificate

1824

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1825

(gnutls.library.functions

1826

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2467

crt = gnutls.openpgp_crt_t()

2468

gnutls.openpgp_crt_init(ctypes.byref(crt))

1827

2469

# Import the OpenPGP public key into the certificate

1828

(gnutls.library.functions

1829

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

1830

gnutls.library.constants

1831

.GNUTLS_OPENPGP_FMT_RAW))

2470

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

2471

gnutls.OPENPGP_FMT_RAW)

1832

2472

# Verify the self signature in the key

1833

2473

crtverify = ctypes.c_uint()

1834

(gnutls.library.functions

1835

.gnutls_openpgp_crt_verify_self(crt, 0,

1836

ctypes.byref(crtverify)))

2474

gnutls.openpgp_crt_verify_self(crt, 0,

2475

ctypes.byref(crtverify))

1837

2476

if crtverify.value != 0:

1838

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1839

raise (gnutls.errors.CertificateSecurityError

1840

("Verify failed"))

2477

gnutls.openpgp_crt_deinit(crt)

2478

raise gnutls.CertificateSecurityError(code

2479

=crtverify.value)

1841

2480

# New buffer for the fingerprint

1842

2481

buf = ctypes.create_string_buffer(20)

1843

2482

buf_len = ctypes.c_size_t()

1844

2483

# Get the fingerprint from the certificate into the buffer

1845

(gnutls.library.functions

1846

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

1847

ctypes.byref(buf_len)))

2484

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

2485

ctypes.byref(buf_len))

1848

2486

# Deinit the certificate

1849

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2487

gnutls.openpgp_crt_deinit(crt)

1850

2488

# Convert the buffer to a Python bytestring

1851

2489

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

1852

2490

# Convert the bytestring to hexadecimal notation

1856

2494

1857

2495

class MultiprocessingMixIn(object):

1858

2496

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

2497

1859

2498

def sub_process_main(self, request, address):

1860

2499

try:

1861

2500

self.finish_request(request, address)

1862

2501

except Exception:

1863

2502

self.handle_error(request, address)

1864

2503

self.close_request(request)

1865

2504

1866

2505

def process_request(self, request, address):

1867

2506

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

1868

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

1869

args = (request, address))

2507

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

2508

args=(request, address))

1870

2509

proc.start()

1871

2510

return proc

1872

2511

1873

2512

1874

2513

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1875

2514

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

2515

1876

2516

def process_request(self, request, client_address):

1877

2517

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

1878

2518

1879

2519

This function creates a new pipe in self.pipe

1880

2520

"""

1881

2521

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1882

2522

1883

2523

proc = MultiprocessingMixIn.process_request(self, request,

1884

2524

client_address)

1885

2525

self.child_pipe.close()

1886

2526

self.add_pipe(parent_pipe, proc)

1887

2527

1888

2528

def add_pipe(self, parent_pipe, proc):

1889

2529

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

1890

raise NotImplementedError

2530

raise NotImplementedError()

1891

2531

1892

2532

1893

2533

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1894

2534

socketserver.TCPServer, object):

1895

2535

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

1896

2536

1897

2537

Attributes:

1898

2538

enabled: Boolean; whether this server is activated yet

1899

2539

interface: None or a network interface name (string)

1900

2540

use_ipv6: Boolean; to use IPv6 or not

1901

2541

"""

2542

1902

2543

def __init__(self, server_address, RequestHandlerClass,

1903

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

2544

interface=None,

2545

use_ipv6=True,

2546

socketfd=None):

1904

2547

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

1905

2548

creating a new one with socket.socket().

1906

2549

"""

1912

2555

self.socketfd = socketfd

1913

2556

# Save the original socket.socket() function

1914

2557

self.socket_socket = socket.socket

2558

1915

2559

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

1916

#

2560

#

1917

2561

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

1918

2562

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

1919

2563

# patching socket.socket.)

1920

#

2564

#

1921

2565

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

1922

2566

@functools.wraps(socket.socket)

1923

2567

def socket_wrapper(*args, **kwargs):

1935

2579

# socket_wrapper(), if socketfd was set.

1936

2580

socketserver.TCPServer.__init__(self, server_address,

1937

2581

RequestHandlerClass)

1938

2582

1939

2583

def server_bind(self):

1940

2584

"""This overrides the normal server_bind() function

1941

2585

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

1942

2586

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

2587

global SO_BINDTODEVICE

1943

2588

if self.interface is not None:

1944

2589

if SO_BINDTODEVICE is None:

1945

logger.error("SO_BINDTODEVICE does not exist;"

1946

" cannot bind to interface %s",

1947

self.interface)

1948

else:

1949

try:

1950

self.socket.setsockopt(socket.SOL_SOCKET,

1951

SO_BINDTODEVICE,

1952

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

1953

except socket.error as error:

1954

if error.errno == errno.EPERM:

1955

logger.error("No permission to bind to"

1956

" interface %s", self.interface)

1957

elif error.errno == errno.ENOPROTOOPT:

1958

logger.error("SO_BINDTODEVICE not available;"

1959

" cannot bind to interface %s",

1960

self.interface)

1961

elif error.errno == errno.ENODEV:

1962

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

1963

" cannot bind", self.interface)

1964

else:

1965

raise

2590

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

2591

# common enough.

2592

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

2593

SO_BINDTODEVICE = 25

2594

try:

2595

self.socket.setsockopt(

2596

socket.SOL_SOCKET, SO_BINDTODEVICE,

2597

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

2598

except socket.error as error:

2599

if error.errno == errno.EPERM:

2600

logger.error("No permission to bind to"

2601

" interface %s", self.interface)

2602

elif error.errno == errno.ENOPROTOOPT:

2603

logger.error("SO_BINDTODEVICE not available;"

2604

" cannot bind to interface %s",

2605

self.interface)

2606

elif error.errno == errno.ENODEV:

2607

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

2608

" cannot bind", self.interface)

2609

else:

2610

raise

1966

2611

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

1967

2612

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

2613

if self.server_address[1]:

2614

self.allow_reuse_address = True

1968

2615

if not self.server_address[0]:

1969

2616

if self.address_family == socket.AF_INET6:

1970

any_address = "::" # in6addr_any

2617

any_address = "::" # in6addr_any

1971

2618

else:

1972

any_address = socket.INADDR_ANY

2619

any_address = "0.0.0.0" # INADDR_ANY

1973

2620

self.server_address = (any_address,

1974

2621

self.server_address[1])

1975

2622

elif not self.server_address[1]:

1976

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

1977

0)

2623

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

1978

2624

# if self.interface:

1979

2625

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

1980

2626

# 0, # port

1986

2632

1987

2633

class MandosServer(IPv6_TCPServer):

1988

2634

"""Mandos server.

1989

2635

1990

2636

Attributes:

1991

2637

clients: set of Client objects

1992

2638

gnutls_priority GnuTLS priority string

1993

2639

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

1994

1995

Assumes a gobject.MainLoop event loop.

2640

2641

Assumes a GLib.MainLoop event loop.

1996

2642

"""

2643

1997

2644

def __init__(self, server_address, RequestHandlerClass,

1998

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

1999

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

2645

interface=None,

2646

use_ipv6=True,

2647

clients=None,

2648

gnutls_priority=None,

2649

use_dbus=True,

2650

socketfd=None):

2000

2651

self.enabled = False

2001

2652

self.clients = clients

2002

2653

if self.clients is None:

2005

2656

self.gnutls_priority = gnutls_priority

2006

2657

IPv6_TCPServer.__init__(self, server_address,

2007

2658

RequestHandlerClass,

2008

interface = interface,

2009

use_ipv6 = use_ipv6,

2010

socketfd = socketfd)

2659

interface=interface,

2660

use_ipv6=use_ipv6,

2661

socketfd=socketfd)

2662

2011

2663

def server_activate(self):

2012

2664

if self.enabled:

2013

2665

return socketserver.TCPServer.server_activate(self)

2014

2666

2015

2667

def enable(self):

2016

2668

self.enabled = True

2017

2669

2018

2670

def add_pipe(self, parent_pipe, proc):

2019

2671

# Call "handle_ipc" for both data and EOF events

2020

gobject.io_add_watch(parent_pipe.fileno(),

2021

gobject.IO_IN | gobject.IO_HUP,

2022

functools.partial(self.handle_ipc,

2023

parent_pipe =

2024

parent_pipe,

2025

proc = proc))

2026

2027

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

2028

proc = None, client_object=None):

2672

GLib.io_add_watch(

2673

parent_pipe.fileno(),

2674

GLib.IO_IN | GLib.IO_HUP,

2675

functools.partial(self.handle_ipc,

2676

parent_pipe=parent_pipe,

2677

proc=proc))

2678

2679

def handle_ipc(self, source, condition,

2680

parent_pipe=None,

2681

proc=None,

2682

client_object=None):

2029

2683

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

2030

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

2684

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

2031

2685

# Wait for other process to exit

2032

2686

proc.join()

2033

2687

return False

2034

2688

2035

2689

# Read a request from the child

2036

2690

request = parent_pipe.recv()

2037

2691

command = request[0]

2038

2692

2039

2693

if command == 'init':

2040

fpr = request[1]

2041

address = request[2]

2042

2043

for c in self.clients.itervalues():

2044

if c.fingerprint == fpr:

2694

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

2695

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

2696

address = request[3]

2697

2698

for c in self.clients.values():

2699

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2700

continue

2701

if key_id and c.key_id == key_id:

2702

client = c

2703

break

2704

if fpr and c.fingerprint == fpr:

2045

2705

client = c

2046

2706

break

2047

2707

else:

2048

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

2049

"dress: %s", fpr, address)

2708

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

2709

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

2050

2710

if self.use_dbus:

2051

2711

# Emit D-Bus signal

2052

mandos_dbus_service.ClientNotFound(fpr,

2712

mandos_dbus_service.ClientNotFound(key_id or fpr,

2053

2713

address[0])

2054

2714

parent_pipe.send(False)

2055

2715

return False

2056

2057

gobject.io_add_watch(parent_pipe.fileno(),

2058

gobject.IO_IN | gobject.IO_HUP,

2059

functools.partial(self.handle_ipc,

2060

parent_pipe =

2061

parent_pipe,

2062

proc = proc,

2063

client_object =

2064

client))

2716

2717

GLib.io_add_watch(

2718

parent_pipe.fileno(),

2719

GLib.IO_IN | GLib.IO_HUP,

2720

functools.partial(self.handle_ipc,

2721

parent_pipe=parent_pipe,

2722

proc=proc,

2723

client_object=client))

2065

2724

parent_pipe.send(True)

2066

2725

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

2067

2726

# same fileno

2070

2729

funcname = request[1]

2071

2730

args = request[2]

2072

2731

kwargs = request[3]

2073

2732

2074

2733

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

2075

2734

funcname)(*args,

2076

**kwargs)))

2077

2735

**kwargs)))

2736

2078

2737

if command == 'getattr':

2079

2738

attrname = request[1]

2080

if callable(client_object.__getattribute__(attrname)):

2081

parent_pipe.send(('function',))

2739

if isinstance(client_object.__getattribute__(attrname),

2740

collections.Callable):

2741

parent_pipe.send(('function', ))

2082

2742

else:

2083

parent_pipe.send(('data', client_object

2084

.__getattribute__(attrname)))

2085

2743

parent_pipe.send((

2744

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

2745

2086

2746

if command == 'setattr':

2087

2747

attrname = request[1]

2088

2748

value = request[2]

2089

2749

setattr(client_object, attrname, value)

2090

2750

2091

2751

return True

2092

2752

2093

2753

2094

2754

def rfc3339_duration_to_delta(duration):

2095

2755

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

2096

2756

2097

2757

>>> rfc3339_duration_to_delta("P7D")

2098

2758

datetime.timedelta(7)

2099

2759

>>> rfc3339_duration_to_delta("PT60S")

2109

2769

>>> rfc3339_duration_to_delta("P1DT3M20S")

2110

2770

datetime.timedelta(1, 200)

2111

2771

"""

2112

2772

2113

2773

# Parsing an RFC 3339 duration with regular expressions is not

2114

2774

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

2115

2775

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

2116

2776

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

2117

2777

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

2118

2778

# avoid excessive use of external libraries.

2119

2779

2120

2780

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

2121

Token = collections.namedtuple("Token",

2122

("regexp", # To match token; if

2123

# "value" is not None,

2124

# must have a "group"

2125

# containing digits

2126

"value", # datetime.timedelta or

2127

# None

2128

"followers")) # Tokens valid after

2129

# this token

2781

Token = collections.namedtuple("Token", (

2782

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

2783

# a "group" containing digits

2784

"value", # datetime.timedelta or None

2785

"followers")) # Tokens valid after this token

2130

2786

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

2131

2787

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

2132

2788

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

2133

2789

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

2134

2790

datetime.timedelta(seconds=1),

2135

frozenset((token_end,)))

2791

frozenset((token_end, )))

2136

2792

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

2137

2793

datetime.timedelta(minutes=1),

2138

2794

frozenset((token_second, token_end)))

2154

2810

frozenset((token_month, token_end)))

2155

2811

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

2156

2812

datetime.timedelta(weeks=1),

2157

frozenset((token_end,)))

2813

frozenset((token_end, )))

2158

2814

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

2159

2815

frozenset((token_year, token_month,

2160

2816

token_day, token_time,

2161

token_week))),

2162

# Define starting values

2163

value = datetime.timedelta() # Value so far

2817

token_week)))

2818

# Define starting values:

2819

# Value so far

2820

value = datetime.timedelta()

2164

2821

found_token = None

2165

followers = frozenset(token_duration,) # Following valid tokens

2166

s = duration # String left to parse

2822

# Following valid tokens

2823

followers = frozenset((token_duration, ))

2824

# String left to parse

2825

s = duration

2167

2826

# Loop until end token is found

2168

2827

while found_token is not token_end:

2169

2828

# Search for any currently valid tokens

2185

2844

break

2186

2845

else:

2187

2846

# No currently valid tokens were found

2188

raise ValueError("Invalid RFC 3339 duration")

2847

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

2848

.format(duration))

2189

2849

# End token found

2190

2850

return value

2191

2851

2192

2852

2193

2853

def string_to_delta(interval):

2194

2854

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

2195

2855

2196

2856

>>> string_to_delta('7d')

2197

2857

datetime.timedelta(7)

2198

2858

>>> string_to_delta('60s')

2206

2866

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

2207

2867

datetime.timedelta(0, 330)

2208

2868

"""

2209

2869

2210

2870

try:

2211

2871

return rfc3339_duration_to_delta(interval)

2212

2872

except ValueError:

2213

2873

pass

2214

2874

2215

2875

timevalue = datetime.timedelta(0)

2216

2876

for s in interval.split():

2217

2877

try:

2218

suffix = unicode(s[-1])

2878

suffix = s[-1]

2219

2879

value = int(s[:-1])

2220

2880

if suffix == "d":

2221

2881

delta = datetime.timedelta(value)

2228

2888

elif suffix == "w":

2229

2889

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

2230

2890

else:

2231

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

2232

.format(suffix))

2233

except (ValueError, IndexError) as e:

2891

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

2892

except IndexError as e:

2234

2893

raise ValueError(*(e.args))

2235

2894

timevalue += delta

2236

2895

return timevalue

2237

2896

2238

2897

2239

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

2898

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

2240

2899

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

2241

2900

2242

2901

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

2243

2902

if os.fork():

2244

2903

sys.exit()

2252

2911

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

2253

2912

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

2254

2913

raise OSError(errno.ENODEV,

2255

"{0} not a character device"

2914

"{} not a character device"

2256

2915

.format(os.devnull))

2257

2916

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

2258

2917

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

2262

2921

2263

2922

2264

2923

def main():

2265

2924

2266

2925

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

2267

2926

# Parsing of options, both command line and config file

2268

2927

2269

2928

parser = argparse.ArgumentParser()

2270

2929

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

2271

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

2930

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

2272

2931

help="show version number and exit")

2273

2932

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

2274

2933

help="Bind to interface IF")

2280

2939

help="Run self-test")

2281

2940

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

2282

2941

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

2283

" to terminal")

2942

" to terminal", default=None)

2284

2943

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

2285

2944

help="Debug level for stdout output")

2286

2945

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

2293

2952

" files")

2294

2953

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

2295

2954

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

2296

" system bus interface")

2955

" system bus interface", default=None)

2297

2956

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

2298

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

2957

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

2958

default=None)

2299

2959

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

2300

2960

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

2301

" state")

2961

" state", default=None)

2302

2962

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

2303

2963

help="Specify a file descriptor to a network"

2304

2964

" socket to use instead of creating one")

2305

2965

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

2306

2966

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

2307

2967

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

2308

help="Run in foreground")

2309

2968

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

2969

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

2970

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

2971

default=None)

2972

2310

2973

options = parser.parse_args()

2311

2974

2312

2975

if options.check:

2313

2976

import doctest

2314

doctest.testmod()

2315

sys.exit()

2316

2977

fail_count, test_count = doctest.testmod()

2978

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

2979

2317

2980

# Default values for config file for server-global settings

2318

server_defaults = { "interface": "",

2319

"address": "",

2320

"port": "",

2321

"debug": "False",

2322

"priority":

2323

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

2324

"servicename": "Mandos",

2325

"use_dbus": "True",

2326

"use_ipv6": "True",

2327

"debuglevel": "",

2328

"restore": "True",

2329

"socket": "",

2330

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

2331

"foreground": "False",

2332

}

2333

2981

if gnutls.has_rawpk:

2982

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

2983

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

2984

else:

2985

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

2986

":+SIGN-DSA-SHA256")

2987

server_defaults = {"interface": "",

2988

"address": "",

2989

"port": "",

2990

"debug": "False",

2991

"priority": priority,

2992

"servicename": "Mandos",

2993

"use_dbus": "True",

2994

"use_ipv6": "True",

2995

"debuglevel": "",

2996

"restore": "True",

2997

"socket": "",

2998

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

2999

"foreground": "False",

3000

"zeroconf": "True",

3001

}

3002

del priority

3003

2334

3004

# Parse config file for server-global settings

2335

server_config = configparser.SafeConfigParser(server_defaults)

3005

server_config = configparser.ConfigParser(server_defaults)

2336

3006

del server_defaults

2337

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

2338

"mandos.conf"))

2339

# Convert the SafeConfigParser object to a dict

3007

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

3008

# Convert the ConfigParser object to a dict

2340

3009

server_settings = server_config.defaults()

2341

3010

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

2342

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

3011

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

3012

"foreground", "zeroconf"):

2343

3013

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

2344

3014

option)

2345

3015

if server_settings["port"]:

2355

3025

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

2356

3026

["socket"])

2357

3027

del server_config

2358

3028

2359

3029

# Override the settings from the config file with command line

2360

3030

# options, if set.

2361

3031

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

2362

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

2363

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

2364

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

3032

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

3033

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

3034

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

2365

3035

value = getattr(options, option)

2366

3036

if value is not None:

2367

3037

server_settings[option] = value

2368

3038

del options

2369

3039

# Force all strings to be unicode

2370

3040

for option in server_settings.keys():

2371

if type(server_settings[option]) is str:

2372

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

3041

if isinstance(server_settings[option], bytes):

3042

server_settings[option] = (server_settings[option]

3043

.decode("utf-8"))

3044

# Force all boolean options to be boolean

3045

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

3046

"foreground", "zeroconf"):

3047

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

2373

3048

# Debug implies foreground

2374

3049

if server_settings["debug"]:

2375

3050

server_settings["foreground"] = True

2376

3051

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

2377

3052

2378

3053

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

2379

3054

3055

if (not server_settings["zeroconf"]

3056

and not (server_settings["port"]

3057

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

3058

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

3059

2380

3060

# For convenience

2381

3061

debug = server_settings["debug"]

2382

3062

debuglevel = server_settings["debuglevel"]

2385

3065

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

2386

3066

stored_state_file)

2387

3067

foreground = server_settings["foreground"]

2388

3068

zeroconf = server_settings["zeroconf"]

3069

2389

3070

if debug:

2390

3071

initlogger(debug, logging.DEBUG)

2391

3072

else:

2394

3075

else:

2395

3076

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

2396

3077

initlogger(debug, level)

2397

3078

2398

3079

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

2399

syslogger.setFormatter(logging.Formatter

2400

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

2401

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

2402

.format(server_settings

2403

["servicename"])))

2404

3080

syslogger.setFormatter(

3081

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

3082

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

3083

server_settings["servicename"])))

3084

2405

3085

# Parse config file with clients

2406

client_config = configparser.SafeConfigParser(Client

2407

.client_defaults)

3086

client_config = configparser.ConfigParser(Client.client_defaults)

2408

3087

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

2409

3088

"clients.conf"))

2410

3089

2411

3090

global mandos_dbus_service

2412

3091

mandos_dbus_service = None

2413

2414

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

2415

server_settings["port"]),

2416

ClientHandler,

2417

interface=(server_settings["interface"]

2418

or None),

2419

use_ipv6=use_ipv6,

2420

gnutls_priority=

2421

server_settings["priority"],

2422

use_dbus=use_dbus,

2423

socketfd=(server_settings["socket"]

2424

or None))

3092

3093

socketfd = None

3094

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

3095

socketfd = server_settings["socket"]

3096

tcp_server = MandosServer(

3097

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

3098

ClientHandler,

3099

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

3100

use_ipv6=use_ipv6,

3101

gnutls_priority=server_settings["priority"],

3102

use_dbus=use_dbus,

3103

socketfd=socketfd)

2425

3104

if not foreground:

2426

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

3105

pidfilename = "/run/mandos.pid"

3106

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

3107

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

2427

3108

pidfile = None

2428

3109

try:

2429

pidfile = open(pidfilename, "w")

3110

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

2430

3111

except IOError as e:

2431

3112

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

2432

3113

exc_info=e)

2433

2434

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

3114

3115

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

3116

("mandos", "mandos"),

3117

("nobody", "nogroup")):

2435

3118

try:

2436

3119

uid = pwd.getpwnam(name).pw_uid

2437

gid = pwd.getpwnam(name).pw_gid

3120

gid = pwd.getpwnam(group).pw_gid

2438

3121

break

2439

3122

except KeyError:

2440

3123

continue

2444

3127

try:

2445

3128

os.setgid(gid)

2446

3129

os.setuid(uid)

3130

if debug:

3131

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

3132

gid))

2447

3133

except OSError as error:

3134

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

3135

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

2448

3136

if error.errno != errno.EPERM:

2449

raise error

2450

3137

raise

3138

2451

3139

if debug:

2452

3140

# Enable all possible GnuTLS debugging

2453

3141

2454

3142

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

2455

3143

# - GnuTLS manual

2456

gnutls.library.functions.gnutls_global_set_log_level(11)

2457

2458

@gnutls.library.types.gnutls_log_func

3144

gnutls.global_set_log_level(11)

3145

3146

@gnutls.log_func

2459

3147

def debug_gnutls(level, string):

2460

3148

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

2461

2462

(gnutls.library.functions

2463

.gnutls_global_set_log_function(debug_gnutls))

2464

3149

3150

gnutls.global_set_log_function(debug_gnutls)

3151

2465

3152

# Redirect stdin so all checkers get /dev/null

2466

3153

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

2467

3154

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

2468

3155

if null > 2:

2469

3156

os.close(null)

2470

3157

2471

3158

# Need to fork before connecting to D-Bus

2472

3159

if not foreground:

2473

3160

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

2474

3161

daemon()

2475

2476

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

2477

# need to inform gobject that threads will be used.

2478

gobject.threads_init()

2479

3162

3163

if gi.version_info < (3, 10, 2):

3164

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

3165

# need to inform GLib that threads will be used.

3166

GLib.threads_init()

3167

2480

3168

global main_loop

2481

3169

# From the Avahi example code

2482

3170

DBusGMainLoop(set_as_default=True)

2483

main_loop = gobject.MainLoop()

3171

main_loop = GLib.MainLoop()

2484

3172

bus = dbus.SystemBus()

2485

3173

# End of Avahi example code

2486

3174

if use_dbus:

2487

3175

try:

2488

3176

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

2489

bus, do_not_queue=True)

2490

old_bus_name = (dbus.service.BusName

2491

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

2492

do_not_queue=True))

2493

except dbus.exceptions.NameExistsException as e:

3177

bus,

3178

do_not_queue=True)

3179

old_bus_name = dbus.service.BusName(

3180

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

3181

do_not_queue=True)

3182

except dbus.exceptions.DBusException as e:

2494

3183

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

2495

3184

use_dbus = False

2496

3185

server_settings["use_dbus"] = False

2497

3186

tcp_server.use_dbus = False

2498

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2499

service = AvahiServiceToSyslog(name =

2500

server_settings["servicename"],

2501

servicetype = "_mandos._tcp",

2502

protocol = protocol, bus = bus)

2503

if server_settings["interface"]:

2504

service.interface = (if_nametoindex

2505

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

2506

3187

if zeroconf:

3188

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3189

service = AvahiServiceToSyslog(

3190

name=server_settings["servicename"],

3191

servicetype="_mandos._tcp",

3192

protocol=protocol,

3193

bus=bus)

3194

if server_settings["interface"]:

3195

service.interface = if_nametoindex(

3196

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

3197

2507

3198

global multiprocessing_manager

2508

3199

multiprocessing_manager = multiprocessing.Manager()

2509

3200

2510

3201

client_class = Client

2511

3202

if use_dbus:

2512

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

2513

3203

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

3204

2514

3205

client_settings = Client.config_parser(client_config)

2515

3206

old_client_settings = {}

2516

3207

clients_data = {}

2517

3208

3209

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

3210

global wnull

3211

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

3212

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

3213

# mode

3214

if debug or not foreground:

3215

wnull.close()

3216

2518

3217

# Get client data and settings from last running state.

2519

3218

if server_settings["restore"]:

2520

3219

try:

2521

3220

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

2522

clients_data, old_client_settings = (pickle.load

2523

(stored_state))

3221

if sys.version_info.major == 2:

3222

clients_data, old_client_settings = pickle.load(

3223

stored_state)

3224

else:

3225

bytes_clients_data, bytes_old_client_settings = (

3226

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

3227

# Fix bytes to strings

3228

# clients_data

3229

# .keys()

3230

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

3231

if isinstance(key, bytes)

3232

else key): value

3233

for key, value in

3234

bytes_clients_data.items()}

3235

del bytes_clients_data

3236

for key in clients_data:

3237

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

3238

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

3239

for k, v in

3240

clients_data[key].items()}

3241

clients_data[key] = value

3242

# .client_structure

3243

value["client_structure"] = [

3244

(s.decode("utf-8")

3245

if isinstance(s, bytes)

3246

else s) for s in

3247

value["client_structure"]]

3248

# .name & .host

3249

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

3250

if isinstance(value[k], bytes):

3251

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

3252

if "key_id" not in value:

3253

value["key_id"] = ""

3254

elif "fingerprint" not in value:

3255

value["fingerprint"] = ""

3256

# old_client_settings

3257

# .keys()

3258

old_client_settings = {

3259

(key.decode("utf-8")

3260

if isinstance(key, bytes)

3261

else key): value

3262

for key, value in

3263

bytes_old_client_settings.items()}

3264

del bytes_old_client_settings

3265

# .host

3266

for value in old_client_settings.values():

3267

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

3268

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

3269

.decode("utf-8"))

2524

3270

os.remove(stored_state_path)

2525

3271

except IOError as e:

2526

3272

if e.errno == errno.ENOENT:

2527

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

2528

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

3273

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

3274

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

2529

3275

else:

2530

3276

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

2531

3277

exc_info=e)

2532

3278

raise

2533

3279

except EOFError as e:

2534

3280

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

2535

"EOFError:", exc_info=e)

2536

3281

"EOFError:",

3282

exc_info=e)

3283

2537

3284

with PGPEngine() as pgp:

2538

for client_name, client in clients_data.iteritems():

3285

for client_name, client in clients_data.items():

3286

# Skip removed clients

3287

if client_name not in client_settings:

3288

continue

3289

2539

3290

# Decide which value to use after restoring saved state.

2540

3291

# We have three different values: Old config file,

2541

3292

# new config file, and saved state.

2546

3297

# For each value in new config, check if it

2547

3298

# differs from the old config value (Except for

2548

3299

# the "secret" attribute)

2549

if (name != "secret" and

2550

value != old_client_settings[client_name]

2551

[name]):

3300

if (name != "secret"

3301

and (value !=

3302

old_client_settings[client_name][name])):

2552

3303

client[name] = value

2553

3304

except KeyError:

2554

3305

pass

2555

3306

2556

3307

# Clients who has passed its expire date can still be

2557

# enabled if its last checker was successful. Clients

3308

# enabled if its last checker was successful. A Client

2558

3309

# whose checker succeeded before we stored its state is

2559

3310

# assumed to have successfully run all checkers during

2560

3311

# downtime.

2562

3313

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

2563

3314

if not client["last_checked_ok"]:

2564

3315

logger.warning(

2565

"disabling client {0} - Client never "

2566

"performed a successful checker"

2567

.format(client_name))

3316

"disabling client {} - Client never "

3317

"performed a successful checker".format(

3318

client_name))

2568

3319

client["enabled"] = False

2569

3320

elif client["last_checker_status"] != 0:

2570

3321

logger.warning(

2571

"disabling client {0} - Client "

2572

"last checker failed with error code {1}"

2573

.format(client_name,

2574

client["last_checker_status"]))

3322

"disabling client {} - Client last"

3323

" checker failed with error code"

3324

" {}".format(

3325

client_name,

3326

client["last_checker_status"]))

2575

3327

client["enabled"] = False

2576

3328

else:

2577

client["expires"] = (datetime.datetime

2578

.utcnow()

2579

+ client["timeout"])

3329

client["expires"] = (

3330

datetime.datetime.utcnow()

3331

+ client["timeout"])

2580

3332

logger.debug("Last checker succeeded,"

2581

" keeping {0} enabled"

2582

.format(client_name))

3333

" keeping {} enabled".format(

3334

client_name))

2583

3335

try:

2584

client["secret"] = (

2585

pgp.decrypt(client["encrypted_secret"],

2586

client_settings[client_name]

2587

["secret"]))

3336

client["secret"] = pgp.decrypt(

3337

client["encrypted_secret"],

3338

client_settings[client_name]["secret"])

2588

3339

except PGPError:

2589

3340

# If decryption fails, we use secret from new settings

2590

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

2591

.format(client_name))

2592

client["secret"] = (

2593

client_settings[client_name]["secret"])

2594

3341

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

3342

client_name))

3343

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

3344

["secret"])

3345

2595

3346

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

2596

3347

for client_name in (set(old_client_settings)

2597

3348

- set(client_settings)):

2599

3350

for client_name in (set(client_settings)

2600

3351

- set(old_client_settings)):

2601

3352

clients_data[client_name] = client_settings[client_name]

2602

3353

2603

3354

# Create all client objects

2604

for client_name, client in clients_data.iteritems():

3355

for client_name, client in clients_data.items():

2605

3356

tcp_server.clients[client_name] = client_class(

2606

name = client_name, settings = client)

2607

3357

name=client_name,

3358

settings=client,

3359

server_settings=server_settings)

3360

2608

3361

if not tcp_server.clients:

2609

3362

logger.warning("No clients defined")

2610

3363

2611

3364

if not foreground:

2612

3365

if pidfile is not None:

3366

pid = os.getpid()

2613

3367

try:

2614

3368

with pidfile:

2615

pid = os.getpid()

2616

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

3369

print(pid, file=pidfile)

2617

3370

except IOError:

2618

3371

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

2619

3372

pidfilename, pid)

2620

3373

del pidfile

2621

3374

del pidfilename

2622

2623

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

2624

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

2625

3375

3376

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

3377

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3378

lambda: main_loop.quit() and False)

3379

2626

3380

if use_dbus:

2627

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

2628

"se.bsnet.fukt.Mandos"})

2629

class MandosDBusService(DBusObjectWithProperties):

3381

3382

@alternate_dbus_interfaces(

3383

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

3384

class MandosDBusService(DBusObjectWithObjectManager):

2630

3385

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

3386

2631

3387

def __init__(self):

2632

3388

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

3389

2633

3390

_interface = "se.recompile.Mandos"

2634

2635

@dbus_interface_annotations(_interface)

2636

def _foo(self):

2637

return { "org.freedesktop.DBus.Property"

2638

".EmitsChangedSignal":

2639

"false"}

2640

3391

2641

3392

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

2642

3393

def ClientAdded(self, objpath):

2643

3394

"D-Bus signal"

2644

3395

pass

2645

3396

2646

3397

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

2647

def ClientNotFound(self, fingerprint, address):

3398

def ClientNotFound(self, key_id, address):

2648

3399

"D-Bus signal"

2649

3400

pass

2650

3401

3402

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

3403

"true"})

2651

3404

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

2652

3405

def ClientRemoved(self, objpath, name):

2653

3406

"D-Bus signal"

2654

3407

pass

2655

3408

3409

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

3410

"true"})

2656

3411

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

2657

3412

def GetAllClients(self):

2658

3413

"D-Bus method"

2659

return dbus.Array(c.dbus_object_path

2660

for c in

2661

tcp_server.clients.itervalues())

2662

3414

return dbus.Array(c.dbus_object_path for c in

3415

tcp_server.clients.values())

3416

3417

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

3418

"true"})

2663

3419

@dbus.service.method(_interface,

2664

3420

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

2665

3421

def GetAllClientsWithProperties(self):

2666

3422

"D-Bus method"

2667

3423

return dbus.Dictionary(

2668

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

2669

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

3424

{c.dbus_object_path: c.GetAll(

3425

"se.recompile.Mandos.Client")

3426

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

2670

3427

signature="oa{sv}")

2671

3428

2672

3429

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

2673

3430

def RemoveClient(self, object_path):

2674

3431

"D-Bus method"

2675

for c in tcp_server.clients.itervalues():

3432

for c in tcp_server.clients.values():

2676

3433

if c.dbus_object_path == object_path:

2677

3434

del tcp_server.clients[c.name]

2678

3435

c.remove_from_connection()

2679

# Don't signal anything except ClientRemoved

3436

# Don't signal the disabling

2680

3437

c.disable(quiet=True)

2681

# Emit D-Bus signal

2682

self.ClientRemoved(object_path, c.name)

3438

# Emit D-Bus signal for removal

3439

self.client_removed_signal(c)

2683

3440

return

2684

3441

raise KeyError(object_path)

2685

3442

2686

3443

del _interface

2687

3444

3445

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3446

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

3447

def GetManagedObjects(self):

3448

"""D-Bus method"""

3449

return dbus.Dictionary(

3450

{client.dbus_object_path:

3451

dbus.Dictionary(

3452

{interface: client.GetAll(interface)

3453

for interface in

3454

client._get_all_interface_names()})

3455

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

3456

3457

def client_added_signal(self, client):

3458

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

3459

if use_dbus:

3460

# New standard signal

3461

self.InterfacesAdded(

3462

client.dbus_object_path,

3463

dbus.Dictionary(

3464

{interface: client.GetAll(interface)

3465

for interface in

3466

client._get_all_interface_names()}))

3467

# Old signal

3468

self.ClientAdded(client.dbus_object_path)

3469

3470

def client_removed_signal(self, client):

3471

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

3472

if use_dbus:

3473

# New standard signal

3474

self.InterfacesRemoved(

3475

client.dbus_object_path,

3476

client._get_all_interface_names())

3477

# Old signal

3478

self.ClientRemoved(client.dbus_object_path,

3479

client.name)

3480

2688

3481

mandos_dbus_service = MandosDBusService()

2689

3482

3483

# Save modules to variables to exempt the modules from being

3484

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

3485

mp = multiprocessing

3486

wn = wnull

3487

2690

3488

def cleanup():

2691

3489

"Cleanup function; run on exit"

2692

service.cleanup()

2693

2694

multiprocessing.active_children()

3490

if zeroconf:

3491

service.cleanup()

3492

3493

mp.active_children()

3494

wn.close()

2695

3495

if not (tcp_server.clients or client_settings):

2696

3496

return

2697

3497

2698

3498

# Store client before exiting. Secrets are encrypted with key

2699

3499

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

2700

3500

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

2701

3501

clients = {}

2702

3502

with PGPEngine() as pgp:

2703

for client in tcp_server.clients.itervalues():

3503

for client in tcp_server.clients.values():

2704

3504

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

2705

3505

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

2706

3506

key)

2707

3507

client_dict = {}

2708

3508

2709

3509

# A list of attributes that can not be pickled

2710

3510

# + secret.

2711

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

2712

"checker"))

2713

for name, typ in (inspect.getmembers

2714

(dbus.service.Object)):

3511

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

3512

"checker", "server_settings"}

3513

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

3514

.Object):

2715

3515

exclude.add(name)

2716

3516

2717

3517

client_dict["encrypted_secret"] = (client

2718

3518

.encrypted_secret)

2719

3519

for attr in client.client_structure:

2720

3520

if attr not in exclude:

2721

3521

client_dict[attr] = getattr(client, attr)

2722

3522

2723

3523

clients[client.name] = client_dict

2724

3524

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

2725

3525

2726

3526

try:

2727

with (tempfile.NamedTemporaryFile

2728

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

2729

dir=os.path.dirname(stored_state_path),

2730

delete=False)) as stored_state:

2731

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

2732

tempname=stored_state.name

3527

with tempfile.NamedTemporaryFile(

3528

mode='wb',

3529

suffix=".pickle",

3530

prefix='clients-',

3531

dir=os.path.dirname(stored_state_path),

3532

delete=False) as stored_state:

3533

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

3534

protocol=2)

3535

tempname = stored_state.name

2733

3536

os.rename(tempname, stored_state_path)

2734

3537

except (IOError, OSError) as e:

2735

3538

if not debug:

2738

3541

except NameError:

2739

3542

pass

2740

3543

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

2741

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

3544

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

2742

3545

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

2743

3546

else:

2744

3547

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

2745

3548

exc_info=e)

2746

raise e

2747

3549

raise

3550

2748

3551

# Delete all clients, and settings from config

2749

3552

while tcp_server.clients:

2750

3553

name, client = tcp_server.clients.popitem()

2751

3554

if use_dbus:

2752

3555

client.remove_from_connection()

2753

# Don't signal anything except ClientRemoved

3556

# Don't signal the disabling

2754

3557

client.disable(quiet=True)

3558

# Emit D-Bus signal for removal

2755

3559

if use_dbus:

2756

# Emit D-Bus signal

2757

mandos_dbus_service.ClientRemoved(client

2758

.dbus_object_path,

2759

client.name)

3560

mandos_dbus_service.client_removed_signal(client)

2760

3561

client_settings.clear()

2761

3562

2762

3563

atexit.register(cleanup)

2763

2764

for client in tcp_server.clients.itervalues():

3564

3565

for client in tcp_server.clients.values():

2765

3566

if use_dbus:

2766

# Emit D-Bus signal

2767

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3567

# Emit D-Bus signal for adding

3568

mandos_dbus_service.client_added_signal(client)

2768

3569

# Need to initiate checking of clients

2769

3570

if client.enabled:

2770

3571

client.init_checker()

2771

3572

2772

3573

tcp_server.enable()

2773

3574

tcp_server.server_activate()

2774

3575

2775

3576

# Find out what port we got

2776

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

3577

if zeroconf:

3578

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

2777

3579

if use_ipv6:

2778

3580

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

2779

3581

" flowinfo %d, scope_id %d",

2781

3583

else: # IPv4

2782

3584

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

2783

3585

*tcp_server.socket.getsockname())

2784

2785

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

2786

3586

3587

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

3588

2787

3589

try:

2788

# From the Avahi example code

2789

try:

2790

service.activate()

2791

except dbus.exceptions.DBusException as error:

2792

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

2793

cleanup()

2794

sys.exit(1)

2795

# End of Avahi example code

2796

2797

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

2798

lambda *args, **kwargs:

2799

(tcp_server.handle_request

2800

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

2801

3590

if zeroconf:

3591

# From the Avahi example code

3592

try:

3593

service.activate()

3594

except dbus.exceptions.DBusException as error:

3595

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

3596

cleanup()

3597

sys.exit(1)

3598

# End of Avahi example code

3599

3600

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

3601

lambda *args, **kwargs:

3602

(tcp_server.handle_request

3603

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

3604

2802

3605

logger.debug("Starting main loop")

2803

3606

main_loop.run()

2804

3607

except AvahiError as error:

2813

3616

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

2814

3617

cleanup()

2815

3618

3619

2816

3620

if __name__ == '__main__':

2817

3621

main()