/mandos/release : revision 237.7.709

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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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if sys.version_info.major == 2:

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__metaclass__ = type

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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 = "1.8.7"

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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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pass

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class PGPEngine(object):

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class PGPEngine:

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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)

267

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

269

passfile.write(passphrase)

270

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)

279

if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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283

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# Pretend that we have an Avahi module

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class avahi:

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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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296

@staticmethod

297

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")

300

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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309

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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))

313

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

314

**kwargs)

315

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316

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class AvahiServiceError(AvahiError):

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318

pass

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319

320

225

321

class AvahiGroupError(AvahiError):

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pass

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323

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324

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class AvahiService(object):

325

class AvahiService:

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326

"""An Avahi (Zeroconf) service.

231

327

232

328

Attributes:

233

329

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

234

330

Used to optionally bind to the specified interface.

235

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name: string; Example: 'Mandos'

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

237

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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334

port: integer; what port to announce

239

335

TXT: list of strings; TXT record for the service

240

336

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

246

342

server: D-Bus Server

247

343

bus: dbus.SystemBus()

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344

"""

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,

253

protocol = avahi.PROTO_UNSPEC, bus = None):

345

346

def __init__(self,

347

interface=avahi.IF_UNSPEC,

348

name=None,

349

servicetype=None,

350

port=None,

351

TXT=None,

352

domain="",

353

host="",

354

max_renames=32768,

355

protocol=avahi.PROTO_UNSPEC,

356

bus=None):

254

357

self.interface = interface

255

358

self.name = name

256

359

self.type = servicetype

265

368

self.server = None

266

369

self.bus = bus

267

370

self.entry_group_state_changed_match = None

268

269

def rename(self):

371

372

def rename(self, remove=True):

270

373

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

271

374

if self.rename_count >= self.max_renames:

272

375

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

273

376

" after %i retries, exiting.",

274

377

self.rename_count)

275

378

raise AvahiServiceError("Too many renames")

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

379

self.name = str(

380

self.server.GetAlternativeServiceName(self.name))

381

self.rename_count += 1

278

382

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

279

383

self.name)

280

self.remove()

384

if remove:

385

self.remove()

281

386

try:

282

387

self.add()

283

388

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

389

if (error.get_dbus_name()

390

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

391

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

392

return self.rename(remove=False)

393

else:

394

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

395

self.cleanup()

396

os._exit(1)

397

289

398

def remove(self):

290

399

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

291

400

if self.entry_group_state_changed_match is not None:

293

402

self.entry_group_state_changed_match = None

294

403

if self.group is not None:

295

404

self.group.Reset()

296

405

297

406

def add(self):

298

407

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

299

408

self.remove()

316

425

dbus.UInt16(self.port),

317

426

avahi.string_array_to_txt_array(self.TXT))

318

427

self.group.Commit()

319

428

320

429

def entry_group_state_changed(self, state, error):

321

430

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

322

431

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

323

432

324

433

if state == avahi.ENTRY_GROUP_ESTABLISHED:

325

434

logger.debug("Zeroconf service established.")

326

435

elif state == avahi.ENTRY_GROUP_COLLISION:

328

437

self.rename()

329

438

elif state == avahi.ENTRY_GROUP_FAILURE:

330

439

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

331

unicode(error))

332

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

333

.format(error))

334

440

str(error))

441

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

442

335

443

def cleanup(self):

336

444

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

337

445

if self.group is not None:

342

450

pass

343

451

self.group = None

344

452

self.remove()

345

453

346

454

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

347

455

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

348

456

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" }

457

bad_states = {

458

avahi.SERVER_INVALID: "Zeroconf server invalid",

459

avahi.SERVER_REGISTERING: None,

460

avahi.SERVER_COLLISION: "Zeroconf server name collision",

461

avahi.SERVER_FAILURE: "Zeroconf server failure",

462

}

356

463

if state in bad_states:

357

464

if bad_states[state] is not None:

358

465

if error is None:

361

468

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

362

469

self.cleanup()

363

470

elif state == avahi.SERVER_RUNNING:

364

self.add()

471

try:

472

self.add()

473

except dbus.exceptions.DBusException as error:

474

if (error.get_dbus_name()

475

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

476

logger.info("Local Zeroconf service name"

477

" collision.")

478

return self.rename(remove=False)

479

else:

480

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

481

self.cleanup()

482

os._exit(1)

365

483

else:

366

484

if error is None:

367

485

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

368

486

else:

369

487

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

370

488

371

489

def activate(self):

372

490

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

373

491

if self.server is None:

377

495

follow_name_owner_changes=True),

378

496

avahi.DBUS_INTERFACE_SERVER)

379

497

self.server.connect_to_signal("StateChanged",

380

self.server_state_changed)

498

self.server_state_changed)

381

499

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

382

500

383

501

384

502

class AvahiServiceToSyslog(AvahiService):

385

def rename(self):

503

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

386

504

"""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)))

505

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

506

syslogger.setFormatter(logging.Formatter(

507

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

508

.format(self.name)))

392

509

return ret

393

510

394

511

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))

400

401

402

class Client(object):

512

# Pretend that we have a GnuTLS module

513

class gnutls:

514

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

515

516

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

517

if library is None:

518

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

519

_library = ctypes.cdll.LoadLibrary(library)

520

del library

521

522

# Unless otherwise indicated, the constants and types below are

523

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

524

525

# Constants

526

E_SUCCESS = 0

527

E_INTERRUPTED = -52

528

E_AGAIN = -28

529

CRT_OPENPGP = 2

530

CRT_RAWPK = 3

531

CLIENT = 2

532

SHUT_RDWR = 0

533

CRD_CERTIFICATE = 1

534

E_NO_CERTIFICATE_FOUND = -49

535

X509_FMT_DER = 0

536

NO_TICKETS = 1<<10

537

ENABLE_RAWPK = 1<<18

538

CTYPE_PEERS = 3

539

KEYID_USE_SHA256 = 1 # gnutls/x509.h

540

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

541

542

# Types

543

class session_int(ctypes.Structure):

544

_fields_ = []

545

session_t = ctypes.POINTER(session_int)

546

547

class certificate_credentials_st(ctypes.Structure):

548

_fields_ = []

549

certificate_credentials_t = ctypes.POINTER(

550

certificate_credentials_st)

551

certificate_type_t = ctypes.c_int

552

553

class datum_t(ctypes.Structure):

554

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

555

('size', ctypes.c_uint)]

556

557

class openpgp_crt_int(ctypes.Structure):

558

_fields_ = []

559

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

560

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

561

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

562

credentials_type_t = ctypes.c_int

563

transport_ptr_t = ctypes.c_void_p

564

close_request_t = ctypes.c_int

565

566

# Exceptions

567

class Error(Exception):

568

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

569

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

570

# code is passed, convert it to a string with

571

# gnutls.strerror()

572

self.code = code

573

if message is None and code is not None:

574

message = gnutls.strerror(code)

575

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

576

message, *args)

577

578

class CertificateSecurityError(Error):

579

pass

580

581

# Classes

582

class Credentials:

583

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

587

self.type = gnutls.CRD_CERTIFICATE

588

589

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

591

592

class ClientSession:

593

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

594

self._c_object = gnutls.session_t()

595

gnutls_flags = gnutls.CLIENT

596

if gnutls.check_version(b"3.5.6"):

597

gnutls_flags |= gnutls.NO_TICKETS

598

if gnutls.has_rawpk:

599

gnutls_flags |= gnutls.ENABLE_RAWPK

600

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

601

del gnutls_flags

602

gnutls.set_default_priority(self._c_object)

603

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

604

gnutls.handshake_set_private_extensions(self._c_object,

605

True)

606

self.socket = socket

607

if credentials is None:

608

credentials = gnutls.Credentials()

609

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

610

ctypes.cast(credentials._c_object,

611

ctypes.c_void_p))

612

self.credentials = credentials

613

614

def __del__(self):

615

gnutls.deinit(self._c_object)

616

617

def handshake(self):

618

return gnutls.handshake(self._c_object)

619

620

def send(self, data):

621

data = bytes(data)

622

data_len = len(data)

623

while data_len > 0:

624

data_len -= gnutls.record_send(self._c_object,

625

data[-data_len:],

626

data_len)

627

628

def bye(self):

629

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

630

631

# Error handling functions

632

def _error_code(result):

633

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

634

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

635

if result >= 0:

636

return result

637

if result == gnutls.E_NO_CERTIFICATE_FOUND:

638

raise gnutls.CertificateSecurityError(code=result)

639

raise gnutls.Error(code=result)

640

641

def _retry_on_error(result, func, arguments):

642

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

643

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

644

while result < 0:

645

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

646

return _error_code(result)

647

result = func(*arguments)

648

return result

649

650

# Unless otherwise indicated, the function declarations below are

651

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

652

653

# Functions

654

priority_set_direct = _library.gnutls_priority_set_direct

655

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

656

ctypes.POINTER(ctypes.c_char_p)]

657

priority_set_direct.restype = _error_code

658

659

init = _library.gnutls_init

660

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

661

init.restype = _error_code

662

663

set_default_priority = _library.gnutls_set_default_priority

664

set_default_priority.argtypes = [session_t]

665

set_default_priority.restype = _error_code

666

667

record_send = _library.gnutls_record_send

668

record_send.argtypes = [session_t, ctypes.c_void_p,

669

ctypes.c_size_t]

670

record_send.restype = ctypes.c_ssize_t

671

record_send.errcheck = _retry_on_error

672

673

certificate_allocate_credentials = (

674

_library.gnutls_certificate_allocate_credentials)

675

certificate_allocate_credentials.argtypes = [

676

ctypes.POINTER(certificate_credentials_t)]

677

certificate_allocate_credentials.restype = _error_code

678

679

certificate_free_credentials = (

680

_library.gnutls_certificate_free_credentials)

681

certificate_free_credentials.argtypes = [

682

certificate_credentials_t]

683

certificate_free_credentials.restype = None

684

685

handshake_set_private_extensions = (

686

_library.gnutls_handshake_set_private_extensions)

687

handshake_set_private_extensions.argtypes = [session_t,

688

ctypes.c_int]

689

handshake_set_private_extensions.restype = None

690

691

credentials_set = _library.gnutls_credentials_set

692

credentials_set.argtypes = [session_t, credentials_type_t,

693

ctypes.c_void_p]

694

credentials_set.restype = _error_code

695

696

strerror = _library.gnutls_strerror

697

strerror.argtypes = [ctypes.c_int]

698

strerror.restype = ctypes.c_char_p

699

700

certificate_type_get = _library.gnutls_certificate_type_get

701

certificate_type_get.argtypes = [session_t]

702

certificate_type_get.restype = _error_code

703

704

certificate_get_peers = _library.gnutls_certificate_get_peers

705

certificate_get_peers.argtypes = [session_t,

706

ctypes.POINTER(ctypes.c_uint)]

707

certificate_get_peers.restype = ctypes.POINTER(datum_t)

708

709

global_set_log_level = _library.gnutls_global_set_log_level

710

global_set_log_level.argtypes = [ctypes.c_int]

711

global_set_log_level.restype = None

712

713

global_set_log_function = _library.gnutls_global_set_log_function

714

global_set_log_function.argtypes = [log_func]

715

global_set_log_function.restype = None

716

717

deinit = _library.gnutls_deinit

718

deinit.argtypes = [session_t]

719

deinit.restype = None

720

721

handshake = _library.gnutls_handshake

722

handshake.argtypes = [session_t]

723

handshake.restype = _error_code

724

handshake.errcheck = _retry_on_error

725

726

transport_set_ptr = _library.gnutls_transport_set_ptr

727

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

728

transport_set_ptr.restype = None

729

730

bye = _library.gnutls_bye

731

bye.argtypes = [session_t, close_request_t]

732

bye.restype = _error_code

733

bye.errcheck = _retry_on_error

734

735

check_version = _library.gnutls_check_version

736

check_version.argtypes = [ctypes.c_char_p]

737

check_version.restype = ctypes.c_char_p

738

739

_need_version = b"3.3.0"

740

if check_version(_need_version) is None:

741

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

742

.format(_need_version))

743

744

_tls_rawpk_version = b"3.6.6"

745

has_rawpk = bool(check_version(_tls_rawpk_version))

746

747

if has_rawpk:

748

# Types

749

class pubkey_st(ctypes.Structure):

750

_fields = []

751

pubkey_t = ctypes.POINTER(pubkey_st)

752

753

x509_crt_fmt_t = ctypes.c_int

754

755

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

756

pubkey_init = _library.gnutls_pubkey_init

757

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

758

pubkey_init.restype = _error_code

759

760

pubkey_import = _library.gnutls_pubkey_import

761

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

762

x509_crt_fmt_t]

763

pubkey_import.restype = _error_code

764

765

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

766

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

767

ctypes.POINTER(ctypes.c_ubyte),

768

ctypes.POINTER(ctypes.c_size_t)]

769

pubkey_get_key_id.restype = _error_code

770

771

pubkey_deinit = _library.gnutls_pubkey_deinit

772

pubkey_deinit.argtypes = [pubkey_t]

773

pubkey_deinit.restype = None

774

else:

775

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

776

777

openpgp_crt_init = _library.gnutls_openpgp_crt_init

778

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

779

openpgp_crt_init.restype = _error_code

780

781

openpgp_crt_import = _library.gnutls_openpgp_crt_import

782

openpgp_crt_import.argtypes = [openpgp_crt_t,

783

ctypes.POINTER(datum_t),

784

openpgp_crt_fmt_t]

785

openpgp_crt_import.restype = _error_code

786

787

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

788

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

789

ctypes.POINTER(ctypes.c_uint)]

790

openpgp_crt_verify_self.restype = _error_code

791

792

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

793

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

794

openpgp_crt_deinit.restype = None

795

796

openpgp_crt_get_fingerprint = (

797

_library.gnutls_openpgp_crt_get_fingerprint)

798

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

799

ctypes.c_void_p,

800

ctypes.POINTER(

801

ctypes.c_size_t)]

802

openpgp_crt_get_fingerprint.restype = _error_code

803

804

if check_version(b"3.6.4"):

805

certificate_type_get2 = _library.gnutls_certificate_type_get2

806

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

807

certificate_type_get2.restype = _error_code

808

809

# Remove non-public functions

810

del _error_code, _retry_on_error

811

812

813

def call_pipe(connection, # : multiprocessing.Connection

814

func, *args, **kwargs):

815

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

816

817

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

818

return value on the provided multiprocessing.Connection.

819

"""

820

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

821

connection.close()

822

823

824

class Client:

403

825

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

404

826

405

827

Attributes:

406

828

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

407

829

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

408

830

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

831

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

832

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

833

running.

834

checker_callback_tag: a GLib event source tag, or None

413

835

checker_command: string; External command which is run to check

414

836

if client lives. %() expansions are done at

415

837

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

416

838

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

417

checker_initiator_tag: a gobject event source tag, or None

839

checker_initiator_tag: a GLib event source tag, or None

418

840

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

419

841

client_structure: Object describing what attributes a client has

420

842

and is used for storing the client at exit

421

843

current_checker_command: string; current running checker_command

422

disable_initiator_tag: a gobject event source tag, or None

844

disable_initiator_tag: a GLib event source tag, or None

423

845

enabled: bool()

424

846

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

425

uniquely identify the client

847

uniquely identify an OpenPGP client

848

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

849

a client using raw public keys

426

850

host: string; available for use by the checker command

427

851

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

428

852

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

430

854

last_checker_status: integer between 0 and 255 reflecting exit

431

855

status of last checker. -1 reflects crashed

432

856

checker, -2 means no checker completed yet.

857

last_checker_signal: The signal which killed the last checker, if

858

last_checker_status is -1

433

859

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

434

860

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

435

861

D-Bus identifiers

440

866

runtime_expansions: Allowed attributes for runtime expansion.

441

867

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

442

868

disabled, or None

869

server_settings: The server_settings dict from main()

443

870

"""

444

871

445

872

runtime_expansions = ("approval_delay", "approval_duration",

446

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

873

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

447

874

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

448

875

"last_approval_request", "last_checked_ok",

449

876

"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

877

client_defaults = {

878

"timeout": "PT5M",

879

"extended_timeout": "PT15M",

880

"interval": "PT2M",

881

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

882

"host": "",

883

"approval_delay": "PT0S",

884

"approval_duration": "PT1S",

885

"approved_by_default": "True",

886

"enabled": "True",

887

}

888

476

889

@staticmethod

477

890

def config_parser(config):

478

891

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

485

898

for client_name in config.sections():

486

899

section = dict(config.items(client_name))

487

900

client = settings[client_name] = {}

488

901

489

902

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

490

903

# Reformat values from string types to Python types

491

904

client["approved_by_default"] = config.getboolean(

492

905

client_name, "approved_by_default")

493

906

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

494

907

"enabled")

495

908

909

# Uppercase and remove spaces from key_id and fingerprint

910

# for later comparison purposes with return value from the

911

# key_id() and fingerprint() functions

912

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

913

.replace(" ", ""))

496

914

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

497

915

.replace(" ", ""))

498

916

if "secret" in section:

499

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

917

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

918

.encode("utf-8"),

919

"base64")

500

920

elif "secfile" in section:

501

921

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

502

922

(section["secfile"])),

503

923

"rb") as secfile:

504

924

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

505

925

else:

506

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

926

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

507

927

.format(section))

508

928

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

509

929

client["extended_timeout"] = string_to_delta(

517

937

client["last_approval_request"] = None

518

938

client["last_checked_ok"] = None

519

939

client["last_checker_status"] = -2

520

940

521

941

return settings

522

523

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

942

943

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

524

944

self.name = name

945

if server_settings is None:

946

server_settings = {}

947

self.server_settings = server_settings

525

948

# adding all client settings

526

for setting, value in settings.iteritems():

949

for setting, value in settings.items():

527

950

setattr(self, setting, value)

528

951

529

952

if self.enabled:

530

953

if not hasattr(self, "last_enabled"):

531

954

self.last_enabled = datetime.datetime.utcnow()

535

958

else:

536

959

self.last_enabled = None

537

960

self.expires = None

538

961

539

962

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

963

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

543

964

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

544

965

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

545

966

datetime.datetime.utcnow())

546

967

547

968

# attributes specific for this server instance

548

969

self.checker = None

549

970

self.checker_initiator_tag = None

552

973

self.current_checker_command = None

553

974

self.approved = None

554

975

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()

976

self.changedstate = multiprocessing_manager.Condition(

977

multiprocessing_manager.Lock())

978

self.client_structure = [attr

979

for attr in self.__dict__.keys()

560

980

if not attr.startswith("_")]

561

981

self.client_structure.append("client_structure")

562

563

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

564

lambda obj:

565

isinstance(obj,

566

property)):

982

983

for name, t in inspect.getmembers(

984

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

567

985

if not name.startswith("_"):

568

986

self.client_structure.append(name)

569

987

570

988

# Send notice to process children that client state has changed

571

989

def send_changedstate(self):

572

990

with self.changedstate:

573

991

self.changedstate.notify_all()

574

992

575

993

def enable(self):

576

994

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

577

995

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

582

1000

self.last_enabled = datetime.datetime.utcnow()

583

1001

self.init_checker()

584

1002

self.send_changedstate()

585

1003

586

1004

def disable(self, quiet=True):

587

1005

"""Disable this client."""

588

1006

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

590

1008

if not quiet:

591

1009

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

592

1010

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

593

gobject.source_remove(self.disable_initiator_tag)

1011

GLib.source_remove(self.disable_initiator_tag)

594

1012

self.disable_initiator_tag = None

595

1013

self.expires = None

596

1014

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

597

gobject.source_remove(self.checker_initiator_tag)

1015

GLib.source_remove(self.checker_initiator_tag)

598

1016

self.checker_initiator_tag = None

599

1017

self.stop_checker()

600

1018

self.enabled = False

601

1019

if not quiet:

602

1020

self.send_changedstate()

603

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

1021

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

604

1022

return False

605

1023

606

1024

def __del__(self):

607

1025

self.disable()

608

1026

609

1027

def init_checker(self):

610

1028

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

611

1029

# and every interval from then on.

612

1030

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))

1031

GLib.source_remove(self.checker_initiator_tag)

1032

self.checker_initiator_tag = GLib.timeout_add(

1033

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

1034

self.start_checker)

617

1035

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

618

1036

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))

1037

GLib.source_remove(self.disable_initiator_tag)

1038

self.disable_initiator_tag = GLib.timeout_add(

1039

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

623

1040

# Also start a new checker *right now*.

624

1041

self.start_checker()

625

626

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

1042

1043

def checker_callback(self, source, condition, connection,

1044

command):

627

1045

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

1046

# Read return code from connection (see call_pipe)

1047

returncode = connection.recv()

1048

connection.close()

1049

self.checker.join()

628

1050

self.checker_callback_tag = None

629

1051

self.checker = None

630

if os.WIFEXITED(condition):

631

self.last_checker_status = os.WEXITSTATUS(condition)

1052

1053

if returncode >= 0:

1054

self.last_checker_status = returncode

1055

self.last_checker_signal = None

632

1056

if self.last_checker_status == 0:

633

1057

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

634

1058

vars(self))

635

1059

self.checked_ok()

636

1060

else:

637

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

638

vars(self))

1061

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

639

1062

else:

640

1063

self.last_checker_status = -1

1064

self.last_checker_signal = -returncode

641

1065

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

642

1066

vars(self))

643

1067

return False

1068

644

1069

def checked_ok(self):

645

1070

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

646

1071

self.last_checked_ok = datetime.datetime.utcnow()

647

1072

self.last_checker_status = 0

1073

self.last_checker_signal = None

648

1074

self.bump_timeout()

649

1075

650

1076

def bump_timeout(self, timeout=None):

651

1077

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

652

1078

if timeout is None:

653

1079

timeout = self.timeout

654

1080

if self.disable_initiator_tag is not None:

655

gobject.source_remove(self.disable_initiator_tag)

1081

GLib.source_remove(self.disable_initiator_tag)

656

1082

self.disable_initiator_tag = None

657

1083

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

658

self.disable_initiator_tag = (gobject.timeout_add

659

(timedelta_to_milliseconds

660

(timeout), self.disable))

1084

self.disable_initiator_tag = GLib.timeout_add(

1085

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

661

1086

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

662

1087

663

1088

def need_approval(self):

664

1089

self.last_approval_request = datetime.datetime.utcnow()

665

1090

666

1091

def start_checker(self):

667

1092

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

668

1093

669

1094

If a checker already exists, leave it running and do

670

1095

nothing."""

671

1096

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

676

1101

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

677

1102

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

678

1103

# 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)

1104

1105

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

1106

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

1107

self.checker.join()

1108

self.checker = None

693

1109

# Start a new checker if needed

694

1110

if self.checker is None:

695

1111

# 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)

1112

escaped_attrs = {

1113

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

1114

for attr in self.runtime_expansions}

700

1115

try:

701

1116

command = self.checker_command % escaped_attrs

702

1117

except TypeError as error:

703

1118

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

704

self.checker_command, exc_info=error)

705

return True # Try again later

1119

self.checker_command,

1120

exc_info=error)

1121

return True # Try again later

706

1122

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

1123

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

1124

self.name)

1125

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

1126

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

1127

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

1128

# always replaced by /dev/null.)

1129

# The exception is when not debugging but nevertheless

1130

# running in the foreground; use the previously

1131

# created wnull.

1132

popen_args = {"close_fds": True,

1133

"shell": True,

1134

"cwd": "/"}

1135

if (not self.server_settings["debug"]

1136

and self.server_settings["foreground"]):

1137

popen_args.update({"stdout": wnull,

1138

"stderr": wnull})

1139

pipe = multiprocessing.Pipe(duplex=False)

1140

self.checker = multiprocessing.Process(

1141

target=call_pipe,

1142

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

1143

kwargs=popen_args)

1144

self.checker.start()

1145

self.checker_callback_tag = GLib.io_add_watch(

1146

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

1147

self.checker_callback, pipe[0], command)

1148

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

731

1149

return True

732

1150

733

1151

def stop_checker(self):

734

1152

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

735

1153

if self.checker_callback_tag:

736

gobject.source_remove(self.checker_callback_tag)

1154

GLib.source_remove(self.checker_callback_tag)

737

1155

self.checker_callback_tag = None

738

1156

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

739

1157

return

740

1158

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

1159

self.checker.terminate()

749

1160

self.checker = None

750

1161

751

1162

752

def dbus_service_property(dbus_interface, signature="v",

753

access="readwrite", byte_arrays=False):

1163

def dbus_service_property(dbus_interface,

1164

signature="v",

1165

access="readwrite",

1166

byte_arrays=False):

754

1167

"""Decorators for marking methods of a DBusObjectWithProperties to

755

1168

become properties on the D-Bus.

756

1169

757

1170

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

758

1171

and with one argument by "Set".

759

1172

760

1173

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

761

1174

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

762

1175

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

765

1178

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

766

1179

if byte_arrays and signature != "ay":

767

1180

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

768

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

1181

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

1182

769

1183

def decorator(func):

770

1184

func._dbus_is_property = True

771

1185

func._dbus_interface = dbus_interface

774

1188

func._dbus_name = func.__name__

775

1189

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

776

1190

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

777

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

778

1192

return func

1193

779

1194

return decorator

780

1195

781

1196

782

1197

def dbus_interface_annotations(dbus_interface):

783

1198

"""Decorator for marking functions returning interface annotations

784

1199

785

1200

Usage:

786

1201

787

1202

@dbus_interface_annotations("org.example.Interface")

788

1203

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

789

1204

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

790

1205

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

791

1206

"false"}

792

1207

"""

1208

793

1209

def decorator(func):

794

1210

func._dbus_is_interface = True

795

1211

func._dbus_interface = dbus_interface

796

1212

func._dbus_name = dbus_interface

797

1213

return func

1214

798

1215

return decorator

799

1216

800

1217

801

1218

def dbus_annotations(annotations):

802

1219

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

803

1220

Usage:

804

1221

1222

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

1223

"org.freedesktop.DBus.Property."

1224

"EmitsChangedSignal": "false"})

805

1225

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

806

1226

access="r")

807

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

808

"org.freedesktop.DBus.Property."

809

"EmitsChangedSignal": "false"})

810

1227

def Property_dbus_property(self):

811

1228

return dbus.Boolean(False)

1229

1230

See also the DBusObjectWithAnnotations class.

812

1231

"""

1232

813

1233

def decorator(func):

814

1234

func._dbus_annotations = annotations

815

1235

return func

1236

816

1237

return decorator

817

1238

818

1239

819

1240

class DBusPropertyException(dbus.exceptions.DBusException):

820

1241

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

821

1242

"""

822

def __unicode__(self):

823

return unicode(str(self))

1243

pass

824

1244

825

1245

826

1246

class DBusPropertyAccessException(DBusPropertyException):

835

1255

pass

836

1256

837

1257

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.

1258

class DBusObjectWithAnnotations(dbus.service.Object):

1259

"""A D-Bus object with annotations.

1260

1261

Classes inheriting from this can use the dbus_annotations

1262

decorator to add annotations to methods or signals.

844

1263

"""

845

1264

846

1265

@staticmethod

847

1266

def _is_dbus_thing(thing):

848

1267

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

849

1268

850

1269

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

851

1270

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

852

1271

"""

853

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

1272

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

854

1273

False)

855

1274

856

1275

def _get_all_dbus_things(self, thing):

857

1276

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

858

1277

"""

859

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

860

name),

1278

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

861

1279

athing.__get__(self))

862

1280

for cls in self.__class__.__mro__

863

1281

for name, athing in

864

inspect.getmembers(cls,

865

self._is_dbus_thing(thing)))

866

1282

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

1283

1284

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1285

out_signature="s",

1286

path_keyword='object_path',

1287

connection_keyword='connection')

1288

def Introspect(self, object_path, connection):

1289

"""Overloading of standard D-Bus method.

1290

1291

Inserts annotation tags on methods and signals.

1292

"""

1293

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

1294

connection)

1295

try:

1296

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

1297

1298

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

1299

# Add annotation tags

1300

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

1301

for tag in if_tag.getElementsByTagName(typ):

1302

annots = dict()

1303

for name, prop in (self.

1304

_get_all_dbus_things(typ)):

1305

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

1306

and prop._dbus_interface

1307

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

1308

annots.update(getattr(

1309

prop, "_dbus_annotations", {}))

1310

for name, value in annots.items():

1311

ann_tag = document.createElement(

1312

"annotation")

1313

ann_tag.setAttribute("name", name)

1314

ann_tag.setAttribute("value", value)

1315

tag.appendChild(ann_tag)

1316

# Add interface annotation tags

1317

for annotation, value in dict(

1318

itertools.chain.from_iterable(

1319

annotations().items()

1320

for name, annotations

1321

in self._get_all_dbus_things("interface")

1322

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

1323

)).items():

1324

ann_tag = document.createElement("annotation")

1325

ann_tag.setAttribute("name", annotation)

1326

ann_tag.setAttribute("value", value)

1327

if_tag.appendChild(ann_tag)

1328

# Fix argument name for the Introspect method itself

1329

if (if_tag.getAttribute("name")

1330

== dbus.INTROSPECTABLE_IFACE):

1331

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

1332

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

1333

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

1334

if (arg.getAttribute("direction")

1335

== "out"):

1336

arg.setAttribute("name",

1337

"xml_data")

1338

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

1339

document.unlink()

1340

except (AttributeError, xml.dom.DOMException,

1341

xml.parsers.expat.ExpatError) as error:

1342

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

1343

exc_info=error)

1344

return xmlstring

1345

1346

1347

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1348

"""A D-Bus object with properties.

1349

1350

Classes inheriting from this can use the dbus_service_property

1351

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

1352

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

1353

"""

1354

867

1355

def _get_dbus_property(self, interface_name, property_name):

868

1356

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

869

1357

property with the specified name and interface.

870

1358

"""

871

for cls in self.__class__.__mro__:

872

for name, value in (inspect.getmembers

873

(cls,

874

self._is_dbus_thing("property"))):

1359

for cls in self.__class__.__mro__:

1360

for name, value in inspect.getmembers(

1361

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

875

1362

if (value._dbus_name == property_name

876

1363

and value._dbus_interface == interface_name):

877

1364

return value.__get__(self)

878

1365

879

1366

# 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",

1367

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

1368

self.dbus_object_path, interface_name, property_name))

1369

1370

@classmethod

1371

def _get_all_interface_names(cls):

1372

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

1373

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

1374

"_dbus_interface", None)

1375

for x in (inspect.getmro(cls))

1376

for attr in dir(x))

1377

if name is not None)

1378

1379

@dbus.service.method(dbus.PROPERTIES_IFACE,

1380

in_signature="ss",

885

1381

out_signature="v")

886

1382

def Get(self, interface_name, property_name):

887

1383

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

893

1389

if not hasattr(value, "variant_level"):

894

1390

return value

895

1391

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

896

1392

897

1393

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

898

1394

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

899

1395

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

905

1401

# The byte_arrays option is not supported yet on

906

1402

# signatures other than "ay".

907

1403

if prop._dbus_signature != "ay":

908

raise ValueError

1404

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

1405

"'ay' signature {!r}"

1406

.format(prop._dbus_signature))

909

1407

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

910

1408

for byte in value))

911

1409

prop(value)

912

913

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

1410

1411

@dbus.service.method(dbus.PROPERTIES_IFACE,

1412

in_signature="s",

914

1413

out_signature="a{sv}")

915

1414

def GetAll(self, interface_name):

916

1415

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

917

1416

standard.

918

1417

919

1418

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

920

1419

"""

921

1420

properties = {}

931

1430

if not hasattr(value, "variant_level"):

932

1431

properties[name] = value

933

1432

continue

934

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

935

value.variant_level+1)

1433

properties[name] = type(value)(

1434

value, variant_level=value.variant_level + 1)

936

1435

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

937

1436

1437

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

1438

def PropertiesChanged(self, interface_name, changed_properties,

1439

invalidated_properties):

1440

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

1441

standard.

1442

"""

1443

pass

1444

938

1445

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

939

1446

out_signature="s",

940

1447

path_keyword='object_path',

941

1448

connection_keyword='connection')

942

1449

def Introspect(self, object_path, connection):

943

1450

"""Overloading of standard D-Bus method.

944

1451

945

1452

Inserts property tags and interface annotation tags.

946

1453

"""

947

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

948

connection)

1454

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1455

object_path,

1456

connection)

949

1457

try:

950

1458

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

1459

951

1460

def make_tag(document, name, prop):

952

1461

e = document.createElement("property")

953

1462

e.setAttribute("name", name)

954

1463

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

955

1464

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

956

1465

return e

1466

957

1467

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

958

1468

# Add property tags

959

1469

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

962

1472

if prop._dbus_interface

963

1473

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

964

1474

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)

1475

# Add annotation tags for properties

1476

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

1477

annots = dict()

1478

for name, prop in self._get_all_dbus_things(

1479

"property"):

1480

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

1481

and prop._dbus_interface

1482

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

1483

annots.update(getattr(

1484

prop, "_dbus_annotations", {}))

1485

for name, value in annots.items():

1486

ann_tag = document.createElement(

1487

"annotation")

1488

ann_tag.setAttribute("name", name)

1489

ann_tag.setAttribute("value", value)

1490

tag.appendChild(ann_tag)

996

1491

# Add the names to the return values for the

997

1492

# "org.freedesktop.DBus.Properties" methods

998

1493

if (if_tag.getAttribute("name")

1017

1512

return xmlstring

1018

1513

1019

1514

1515

try:

1516

dbus.OBJECT_MANAGER_IFACE

1517

except AttributeError:

1518

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

1519

1520

1521

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1522

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

1523

1524

Classes inheriting from this exposes the standard

1525

GetManagedObjects call and the InterfacesAdded and

1526

InterfacesRemoved signals on the standard

1527

"org.freedesktop.DBus.ObjectManager" interface.

1528

1529

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

1530

manually.

1531

"""

1532

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1533

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

1534

def GetManagedObjects(self):

1535

"""This function must be overridden"""

1536

raise NotImplementedError()

1537

1538

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1539

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

1540

def InterfacesAdded(self, object_path, interfaces_and_properties):

1541

pass

1542

1543

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

1544

def InterfacesRemoved(self, object_path, interfaces):

1545

pass

1546

1547

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1548

out_signature="s",

1549

path_keyword='object_path',

1550

connection_keyword='connection')

1551

def Introspect(self, object_path, connection):

1552

"""Overloading of standard D-Bus method.

1553

1554

Override return argument name of GetManagedObjects to be

1555

"objpath_interfaces_and_properties"

1556

"""

1557

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1558

object_path,

1559

connection)

1560

try:

1561

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

1562

1563

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

1564

# Fix argument name for the GetManagedObjects method

1565

if (if_tag.getAttribute("name")

1566

== dbus.OBJECT_MANAGER_IFACE):

1567

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

1568

if (cn.getAttribute("name")

1569

== "GetManagedObjects"):

1570

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

1571

if (arg.getAttribute("direction")

1572

== "out"):

1573

arg.setAttribute(

1574

"name",

1575

"objpath_interfaces"

1576

"_and_properties")

1577

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

1578

document.unlink()

1579

except (AttributeError, xml.dom.DOMException,

1580

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1583

return xmlstring

1584

1585

1020

1586

def datetime_to_dbus(dt, variant_level=0):

1021

1587

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

1022

1588

if dt is None:

1023

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

1024

return dbus.String(dt.isoformat(),

1025

variant_level=variant_level)

1589

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

1590

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

1026

1591

1027

1592

1028

1593

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1030

1595

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

1031

1596

interface names according to the "alt_interface_names" mapping.

1032

1597

Usage:

1033

1598

1034

1599

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

1035

1600

"net.example.AlternateInterface"})

1036

1601

class SampleDBusObject(dbus.service.Object):

1037

1602

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

1038

1603

def SampleDBusMethod():

1039

1604

pass

1040

1605

1041

1606

The above "SampleDBusMethod" on "SampleDBusObject" will be

1042

1607

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

1043

1608

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

1044

1609

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

1045

1610

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

1046

1611

1047

1612

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

1048

1613

(from DBusObjectWithProperties) and interfaces (from the

1049

1614

dbus_interface_annotations decorator).

1050

1615

"""

1616

1051

1617

def wrapper(cls):

1052

1618

for orig_interface_name, alt_interface_name in (

1053

alt_interface_names.iteritems()):

1619

alt_interface_names.items()):

1054

1620

attr = {}

1055

1621

interface_names = set()

1056

1622

# Go though all attributes of the class

1058

1624

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

1059

1625

# with the wrong interface name

1060

1626

if (not hasattr(attribute, "_dbus_interface")

1061

or not attribute._dbus_interface

1062

.startswith(orig_interface_name)):

1627

or not attribute._dbus_interface.startswith(

1628

orig_interface_name)):

1063

1629

continue

1064

1630

# Create an alternate D-Bus interface name based on

1065

1631

# the current name

1066

alt_interface = (attribute._dbus_interface

1067

.replace(orig_interface_name,

1068

alt_interface_name))

1632

alt_interface = attribute._dbus_interface.replace(

1633

orig_interface_name, alt_interface_name)

1069

1634

interface_names.add(alt_interface)

1070

1635

# Is this a D-Bus signal?

1071

1636

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

1072

# Extract the original non-method function by

1073

# black magic

1074

nonmethod_func = (dict(

1637

# Extract the original non-method undecorated

1638

# function by black magic

1639

if sys.version_info.major == 2:

1640

nonmethod_func = (dict(

1075

1641

zip(attribute.func_code.co_freevars,

1076

attribute.__closure__))["func"]

1077

.cell_contents)

1642

attribute.__closure__))

1643

["func"].cell_contents)

1644

else:

1645

nonmethod_func = (dict(

1646

zip(attribute.__code__.co_freevars,

1647

attribute.__closure__))

1648

["func"].cell_contents)

1078

1649

# Create a new, but exactly alike, function

1079

1650

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

1080

1651

# 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)))

1652

new_function = copy_function(nonmethod_func)

1653

new_function = (dbus.service.signal(

1654

alt_interface,

1655

attribute._dbus_signature)(new_function))

1090

1656

# Copy annotations, if any

1091

1657

try:

1092

new_function._dbus_annotations = (

1093

dict(attribute._dbus_annotations))

1658

new_function._dbus_annotations = dict(

1659

attribute._dbus_annotations)

1094

1660

except AttributeError:

1095

1661

pass

1662

1096

1663

# Define a creator of a function to call both the

1097

1664

# original and alternate functions, so both the

1098

1665

# original and alternate signals gets sent when

1101

1668

"""This function is a scope container to pass

1102

1669

func1 and func2 to the "call_both" function

1103

1670

outside of its arguments"""

1671

1672

@functools.wraps(func2)

1104

1673

def call_both(*args, **kwargs):

1105

1674

"""This function will emit two D-Bus

1106

1675

signals by calling func1 and func2"""

1107

1676

func1(*args, **kwargs)

1108

1677

func2(*args, **kwargs)

1678

# Make wrapper function look like a D-Bus

1679

# signal

1680

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

1681

if name.startswith("_dbus_"):

1682

setattr(call_both, name, attr)

1683

1109

1684

return call_both

1110

1685

# Create the "call_both" function and add it to

1111

1686

# the class

1116

1691

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

1117

1692

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

1118

1693

# 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)))

1694

attr[attrname] = (

1695

dbus.service.method(

1696

alt_interface,

1697

attribute._dbus_in_signature,

1698

attribute._dbus_out_signature)

1699

(copy_function(attribute)))

1129

1700

# Copy annotations, if any

1130

1701

try:

1131

attr[attrname]._dbus_annotations = (

1132

dict(attribute._dbus_annotations))

1702

attr[attrname]._dbus_annotations = dict(

1703

attribute._dbus_annotations)

1133

1704

except AttributeError:

1134

1705

pass

1135

1706

# Is this a D-Bus property?

1138

1709

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

1139

1710

# property with the alternate D-Bus interface

1140

1711

# 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)))

1712

attr[attrname] = (dbus_service_property(

1713

alt_interface, attribute._dbus_signature,

1714

attribute._dbus_access,

1715

attribute._dbus_get_args_options

1716

["byte_arrays"])

1717

(copy_function(attribute)))

1154

1718

# Copy annotations, if any

1155

1719

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1720

attr[attrname]._dbus_annotations = dict(

1721

attribute._dbus_annotations)

1158

1722

except AttributeError:

1159

1723

pass

1160

1724

# Is this a D-Bus interface?

1163

1727

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

1164

1728

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

1165

1729

# 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)))

1730

attr[attrname] = (

1731

dbus_interface_annotations(alt_interface)

1732

(copy_function(attribute)))

1174

1733

if deprecate:

1175

1734

# Deprecate all alternate interfaces

1176

iname="_AlternateDBusNames_interface_annotation{0}"

1735

iname = "_AlternateDBusNames_interface_annotation{}"

1177

1736

for interface_name in interface_names:

1737

1178

1738

@dbus_interface_annotations(interface_name)

1179

1739

def func(self):

1180

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

1181

"true" }

1740

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

1741

"true"}

1182

1742

# Find an unused name

1183

1743

for aname in (iname.format(i)

1184

1744

for i in itertools.count()):

1188

1748

if interface_names:

1189

1749

# Replace the class with a new subclass of it with

1190

1750

# methods, signals, etc. as created above.

1191

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

1192

(cls,), attr)

1751

if sys.version_info.major == 2:

1752

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

1753

(cls, ), attr)

1754

else:

1755

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

1756

(cls, ), attr)

1193

1757

return cls

1758

1194

1759

return wrapper

1195

1760

1196

1761

1197

1762

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

1198

"se.bsnet.fukt.Mandos"})

1763

"se.bsnet.fukt.Mandos"})

1199

1764

class ClientDBus(Client, DBusObjectWithProperties):

1200

1765

"""A Client class using D-Bus

1201

1766

1202

1767

Attributes:

1203

1768

dbus_object_path: dbus.ObjectPath

1204

1769

bus: dbus.SystemBus()

1205

1770

"""

1206

1771

1207

1772

runtime_expansions = (Client.runtime_expansions

1208

+ ("dbus_object_path",))

1209

1773

+ ("dbus_object_path", ))

1774

1775

_interface = "se.recompile.Mandos.Client"

1776

1210

1777

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

1211

1212

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

1778

1779

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

1213

1780

self.bus = bus

1214

1781

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

1215

1782

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

1216

1783

# the D-Bus

1217

client_object_name = unicode(self.name).translate(

1784

client_object_name = str(self.name).translate(

1218

1785

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

1219

1786

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

1220

self.dbus_object_path = (dbus.ObjectPath

1221

("/clients/" + client_object_name))

1787

self.dbus_object_path = dbus.ObjectPath(

1788

"/clients/" + client_object_name)

1222

1789

DBusObjectWithProperties.__init__(self, self.bus,

1223

1790

self.dbus_object_path)

1224

1225

def notifychangeproperty(transform_func,

1226

dbus_name, type_func=lambda x: x,

1227

variant_level=1):

1791

1792

def notifychangeproperty(transform_func, dbus_name,

1793

type_func=lambda x: x,

1794

variant_level=1,

1795

invalidate_only=False,

1796

_interface=_interface):

1228

1797

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

1229

1798

its changes to DBus.

1230

1799

1231

1800

transform_fun: Function that takes a value and a variant_level

1232

1801

and transforms it to a D-Bus type.

1233

1802

dbus_name: D-Bus name of the variable

1235

1804

to the D-Bus. Default: no transform

1236

1805

variant_level: D-Bus variant level. Default: 1

1237

1806

"""

1238

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

1807

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

1808

1239

1809

def setter(self, value):

1240

1810

if hasattr(self, "dbus_object_path"):

1241

1811

if (not hasattr(self, attrname) or

1242

1812

type_func(getattr(self, attrname, None))

1243

1813

!= 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)

1814

if invalidate_only:

1815

self.PropertiesChanged(

1816

_interface, dbus.Dictionary(),

1817

dbus.Array((dbus_name, )))

1818

else:

1819

dbus_value = transform_func(

1820

type_func(value),

1821

variant_level=variant_level)

1822

self.PropertyChanged(dbus.String(dbus_name),

1823

dbus_value)

1824

self.PropertiesChanged(

1825

_interface,

1826

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

1827

dbus_value}),

1828

dbus.Array())

1249

1829

setattr(self, attrname, value)

1250

1830

1251

1831

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

1252

1832

1253

1833

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1254

1834

approvals_pending = notifychangeproperty(dbus.Boolean,

1255

1835

"ApprovalPending",

1256

type_func = bool)

1836

type_func=bool)

1257

1837

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

1258

1838

last_enabled = notifychangeproperty(datetime_to_dbus,

1259

1839

"LastEnabled")

1260

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

1261

type_func = lambda checker:

1262

checker is not None)

1840

checker = notifychangeproperty(

1841

dbus.Boolean, "CheckerRunning",

1842

type_func=lambda checker: checker is not None)

1263

1843

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1264

1844

"LastCheckedOK")

1265

1845

last_checker_status = notifychangeproperty(dbus.Int16,

1268

1848

datetime_to_dbus, "LastApprovalRequest")

1269

1849

approved_by_default = notifychangeproperty(dbus.Boolean,

1270

1850

"ApprovedByDefault")

1271

approval_delay = notifychangeproperty(dbus.UInt64,

1272

"ApprovalDelay",

1273

type_func =

1274

timedelta_to_milliseconds)

1851

approval_delay = notifychangeproperty(

1852

dbus.UInt64, "ApprovalDelay",

1853

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

1275

1854

approval_duration = notifychangeproperty(

1276

1855

dbus.UInt64, "ApprovalDuration",

1277

type_func = timedelta_to_milliseconds)

1856

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

1278

1857

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

1279

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

1280

type_func =

1281

timedelta_to_milliseconds)

1858

timeout = notifychangeproperty(

1859

dbus.UInt64, "Timeout",

1860

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

1282

1861

extended_timeout = notifychangeproperty(

1283

1862

dbus.UInt64, "ExtendedTimeout",

1284

type_func = timedelta_to_milliseconds)

1285

interval = notifychangeproperty(dbus.UInt64,

1286

"Interval",

1287

type_func =

1288

timedelta_to_milliseconds)

1863

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

1864

interval = notifychangeproperty(

1865

dbus.UInt64, "Interval",

1866

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

1289

1867

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

1290

1868

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

1869

invalidate_only=True)

1870

1291

1871

del notifychangeproperty

1292

1872

1293

1873

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

1294

1874

try:

1295

1875

self.remove_from_connection()

1298

1878

if hasattr(DBusObjectWithProperties, "__del__"):

1299

1879

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

1300

1880

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)

1881

1882

def checker_callback(self, source, condition,

1883

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

1884

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

1885

connection, command, *args,

1886

**kwargs)

1887

exitstatus = self.last_checker_status

1888

if exitstatus >= 0:

1308

1889

# Emit D-Bus signal

1309

1890

self.CheckerCompleted(dbus.Int16(exitstatus),

1310

dbus.Int64(condition),

1891

# This is specific to GNU libC

1892

dbus.Int64(exitstatus << 8),

1311

1893

dbus.String(command))

1312

1894

else:

1313

1895

# Emit D-Bus signal

1314

1896

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

1315

dbus.Int64(condition),

1897

dbus.Int64(

1898

# This is specific to GNU libC

1899

(exitstatus << 8)

1900

| self.last_checker_signal),

1316

1901

dbus.String(command))

1317

1318

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

1319

*args, **kwargs)

1320

1902

return ret

1903

1321

1904

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

1905

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

1327

1906

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

1328

1907

# Only if new checker process was started

1329

1908

if (self.checker is not None

1331

1910

# Emit D-Bus signal

1332

1911

self.CheckerStarted(self.current_checker_command)

1333

1912

return r

1334

1913

1335

1914

def _reset_approved(self):

1336

1915

self.approved = None

1337

1916

return False

1338

1917

1339

1918

def approve(self, value=True):

1340

1919

self.approved = value

1341

gobject.timeout_add(timedelta_to_milliseconds

1342

(self.approval_duration),

1343

self._reset_approved)

1920

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

1921

* 1000), self._reset_approved)

1344

1922

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

1923

1924

# D-Bus methods, signals & properties

1925

1926

# Interfaces

1927

1928

# Signals

1929

1358

1930

# CheckerCompleted - signal

1359

1931

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

1360

1932

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

1361

1933

"D-Bus signal"

1362

1934

pass

1363

1935

1364

1936

# CheckerStarted - signal

1365

1937

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

1366

1938

def CheckerStarted(self, command):

1367

1939

"D-Bus signal"

1368

1940

pass

1369

1941

1370

1942

# PropertyChanged - signal

1943

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

1371

1944

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

1372

1945

def PropertyChanged(self, property, value):

1373

1946

"D-Bus signal"

1374

1947

pass

1375

1948

1376

1949

# GotSecret - signal

1377

1950

@dbus.service.signal(_interface)

1378

1951

def GotSecret(self):

1381

1954

server to mandos-client

1382

1955

"""

1383

1956

pass

1384

1957

1385

1958

# Rejected - signal

1386

1959

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

1387

1960

def Rejected(self, reason):

1388

1961

"D-Bus signal"

1389

1962

pass

1390

1963

1391

1964

# NeedApproval - signal

1392

1965

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

1393

1966

def NeedApproval(self, timeout, default):

1394

1967

"D-Bus signal"

1395

1968

return self.need_approval()

1396

1397

## Methods

1398

1969

1970

# Methods

1971

1399

1972

# Approve - method

1400

1973

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

1401

1974

def Approve(self, value):

1402

1975

self.approve(value)

1403

1976

1404

1977

# CheckedOK - method

1405

1978

@dbus.service.method(_interface)

1406

1979

def CheckedOK(self):

1407

1980

self.checked_ok()

1408

1981

1409

1982

# Enable - method

1983

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

1410

1984

@dbus.service.method(_interface)

1411

1985

def Enable(self):

1412

1986

"D-Bus method"

1413

1987

self.enable()

1414

1988

1415

1989

# StartChecker - method

1990

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

1416

1991

@dbus.service.method(_interface)

1417

1992

def StartChecker(self):

1418

1993

"D-Bus method"

1419

1994

self.start_checker()

1420

1995

1421

1996

# Disable - method

1997

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

1422

1998

@dbus.service.method(_interface)

1423

1999

def Disable(self):

1424

2000

"D-Bus method"

1425

2001

self.disable()

1426

2002

1427

2003

# StopChecker - method

2004

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

1428

2005

@dbus.service.method(_interface)

1429

2006

def StopChecker(self):

1430

2007

self.stop_checker()

1431

1432

## Properties

1433

2008

2009

# Properties

2010

1434

2011

# ApprovalPending - property

1435

2012

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

1436

2013

def ApprovalPending_dbus_property(self):

1437

2014

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

1438

2015

1439

2016

# ApprovedByDefault - property

1440

@dbus_service_property(_interface, signature="b",

2017

@dbus_service_property(_interface,

2018

signature="b",

1441

2019

access="readwrite")

1442

2020

def ApprovedByDefault_dbus_property(self, value=None):

1443

2021

if value is None: # get

1444

2022

return dbus.Boolean(self.approved_by_default)

1445

2023

self.approved_by_default = bool(value)

1446

2024

1447

2025

# ApprovalDelay - property

1448

@dbus_service_property(_interface, signature="t",

2026

@dbus_service_property(_interface,

2027

signature="t",

1449

2028

access="readwrite")

1450

2029

def ApprovalDelay_dbus_property(self, value=None):

1451

2030

if value is None: # get

1452

return dbus.UInt64(self.approval_delay_milliseconds())

2031

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

2032

* 1000)

1453

2033

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

1454

2034

1455

2035

# ApprovalDuration - property

1456

@dbus_service_property(_interface, signature="t",

2036

@dbus_service_property(_interface,

2037

signature="t",

1457

2038

access="readwrite")

1458

2039

def ApprovalDuration_dbus_property(self, value=None):

1459

2040

if value is None: # get

1460

return dbus.UInt64(timedelta_to_milliseconds(

1461

self.approval_duration))

2041

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

2042

* 1000)

1462

2043

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

1463

2044

1464

2045

# Name - property

2046

@dbus_annotations(

2047

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

1465

2048

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

1466

2049

def Name_dbus_property(self):

1467

2050

return dbus.String(self.name)

1468

2051

2052

# KeyID - property

2053

@dbus_annotations(

2054

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

2055

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

2056

def KeyID_dbus_property(self):

2057

return dbus.String(self.key_id)

2058

1469

2059

# Fingerprint - property

2060

@dbus_annotations(

2061

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

1470

2062

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

1471

2063

def Fingerprint_dbus_property(self):

1472

2064

return dbus.String(self.fingerprint)

1473

2065

1474

2066

# Host - property

1475

@dbus_service_property(_interface, signature="s",

2067

@dbus_service_property(_interface,

2068

signature="s",

1476

2069

access="readwrite")

1477

2070

def Host_dbus_property(self, value=None):

1478

2071

if value is None: # get

1479

2072

return dbus.String(self.host)

1480

self.host = unicode(value)

1481

2073

self.host = str(value)

2074

1482

2075

# Created - property

2076

@dbus_annotations(

2077

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

1483

2078

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

1484

2079

def Created_dbus_property(self):

1485

2080

return datetime_to_dbus(self.created)

1486

2081

1487

2082

# LastEnabled - property

1488

2083

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

1489

2084

def LastEnabled_dbus_property(self):

1490

2085

return datetime_to_dbus(self.last_enabled)

1491

2086

1492

2087

# Enabled - property

1493

@dbus_service_property(_interface, signature="b",

2088

@dbus_service_property(_interface,

2089

signature="b",

1494

2090

access="readwrite")

1495

2091

def Enabled_dbus_property(self, value=None):

1496

2092

if value is None: # get

1499

2095

self.enable()

1500

2096

else:

1501

2097

self.disable()

1502

2098

1503

2099

# LastCheckedOK - property

1504

@dbus_service_property(_interface, signature="s",

2100

@dbus_service_property(_interface,

2101

signature="s",

1505

2102

access="readwrite")

1506

2103

def LastCheckedOK_dbus_property(self, value=None):

1507

2104

if value is not None:

1508

2105

self.checked_ok()

1509

2106

return

1510

2107

return datetime_to_dbus(self.last_checked_ok)

1511

2108

1512

2109

# LastCheckerStatus - property

1513

@dbus_service_property(_interface, signature="n",

1514

access="read")

2110

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

1515

2111

def LastCheckerStatus_dbus_property(self):

1516

2112

return dbus.Int16(self.last_checker_status)

1517

2113

1518

2114

# Expires - property

1519

2115

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

1520

2116

def Expires_dbus_property(self):

1521

2117

return datetime_to_dbus(self.expires)

1522

2118

1523

2119

# LastApprovalRequest - property

1524

2120

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

1525

2121

def LastApprovalRequest_dbus_property(self):

1526

2122

return datetime_to_dbus(self.last_approval_request)

1527

2123

1528

2124

# Timeout - property

1529

@dbus_service_property(_interface, signature="t",

2125

@dbus_service_property(_interface,

2126

signature="t",

1530

2127

access="readwrite")

1531

2128

def Timeout_dbus_property(self, value=None):

1532

2129

if value is None: # get

1533

return dbus.UInt64(self.timeout_milliseconds())

2130

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

1534

2131

old_timeout = self.timeout

1535

2132

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

1536

2133

# Reschedule disabling

1544

2141

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

1545

2142

is None):

1546

2143

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

2144

GLib.source_remove(self.disable_initiator_tag)

2145

self.disable_initiator_tag = GLib.timeout_add(

2146

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

2147

self.disable)

2148

1553

2149

# ExtendedTimeout - property

1554

@dbus_service_property(_interface, signature="t",

2150

@dbus_service_property(_interface,

2151

signature="t",

1555

2152

access="readwrite")

1556

2153

def ExtendedTimeout_dbus_property(self, value=None):

1557

2154

if value is None: # get

1558

return dbus.UInt64(self.extended_timeout_milliseconds())

2155

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

2156

* 1000)

1559

2157

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

1560

2158

1561

2159

# Interval - property

1562

@dbus_service_property(_interface, signature="t",

2160

@dbus_service_property(_interface,

2161

signature="t",

1563

2162

access="readwrite")

1564

2163

def Interval_dbus_property(self, value=None):

1565

2164

if value is None: # get

1566

return dbus.UInt64(self.interval_milliseconds())

2165

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

1567

2166

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

1568

2167

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

1569

2168

return

1570

2169

if self.enabled:

1571

2170

# 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

2171

GLib.source_remove(self.checker_initiator_tag)

2172

self.checker_initiator_tag = GLib.timeout_add(

2173

value, self.start_checker)

2174

self.start_checker() # Start one now, too

2175

1577

2176

# Checker - property

1578

@dbus_service_property(_interface, signature="s",

2177

@dbus_service_property(_interface,

2178

signature="s",

1579

2179

access="readwrite")

1580

2180

def Checker_dbus_property(self, value=None):

1581

2181

if value is None: # get

1582

2182

return dbus.String(self.checker_command)

1583

self.checker_command = unicode(value)

1584

2183

self.checker_command = str(value)

2184

1585

2185

# CheckerRunning - property

1586

@dbus_service_property(_interface, signature="b",

2186

@dbus_service_property(_interface,

2187

signature="b",

1587

2188

access="readwrite")

1588

2189

def CheckerRunning_dbus_property(self, value=None):

1589

2190

if value is None: # get

1592

2193

self.start_checker()

1593

2194

else:

1594

2195

self.stop_checker()

1595

2196

1596

2197

# ObjectPath - property

2198

@dbus_annotations(

2199

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

2200

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

1597

2201

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

1598

2202

def ObjectPath_dbus_property(self):

1599

return self.dbus_object_path # is already a dbus.ObjectPath

1600

2203

return self.dbus_object_path # is already a dbus.ObjectPath

2204

1601

2205

# Secret = property

1602

@dbus_service_property(_interface, signature="ay",

1603

access="write", byte_arrays=True)

2206

@dbus_annotations(

2207

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

2208

"invalidates"})

2209

@dbus_service_property(_interface,

2210

signature="ay",

2211

access="write",

2212

byte_arrays=True)

1604

2213

def Secret_dbus_property(self, value):

1605

self.secret = str(value)

1606

2214

self.secret = bytes(value)

2215

1607

2216

del _interface

1608

2217

1609

2218

1610

class ProxyClient(object):

1611

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

2219

class ProxyClient:

2220

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

1612

2221

self._pipe = child_pipe

1613

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

2222

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

1614

2223

if not self._pipe.recv():

1615

raise KeyError()

1616

2224

raise KeyError(key_id or fpr)

2225

1617

2226

def __getattribute__(self, name):

1618

2227

if name == '_pipe':

1619

2228

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

1622

2231

if data[0] == 'data':

1623

2232

return data[1]

1624

2233

if data[0] == 'function':

2234

1625

2235

def func(*args, **kwargs):

1626

2236

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

1627

2237

return self._pipe.recv()[1]

2238

1628

2239

return func

1629

2240

1630

2241

def __setattr__(self, name, value):

1631

2242

if name == '_pipe':

1632

2243

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

1635

2246

1636

2247

class ClientHandler(socketserver.BaseRequestHandler, object):

1637

2248

"""A class to handle client connections.

1638

2249

1639

2250

Instantiated once for each connection to handle it.

1640

2251

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

1641

2252

1642

2253

def handle(self):

1643

2254

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

1644

2255

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

1645

unicode(self.client_address))

2256

str(self.client_address))

1646

2257

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

1647

2258

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"))

2259

2260

session = gnutls.ClientSession(self.request)

2261

2262

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

2263

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

2264

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

2265

# "+DHE-DSS"))

1663

2266

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

1664

2267

priority = self.server.gnutls_priority

1665

2268

if priority is None:

1666

2269

priority = "NORMAL"

1667

(gnutls.library.functions

1668

.gnutls_priority_set_direct(session._c_object,

1669

priority, None))

1670

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2273

1671

2274

# Start communication using the Mandos protocol

1672

2275

# Get protocol number

1673

2276

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

1674

2277

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

1675

2278

try:

1676

2279

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

1677

raise RuntimeError

2280

raise RuntimeError(line)

1678

2281

except (ValueError, IndexError, RuntimeError) as error:

1679

2282

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

1680

2283

return

1681

2284

1682

2285

# Start GnuTLS connection

1683

2286

try:

1684

2287

session.handshake()

1685

except gnutls.errors.GNUTLSError as error:

2288

except gnutls.Error as error:

1686

2289

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

1687

2290

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

1688

2291

# established. Just abandon the request.

1689

2292

return

1690

2293

logger.debug("Handshake succeeded")

1691

2294

1692

2295

approval_required = False

1693

2296

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,

2297

if gnutls.has_rawpk:

2298

fpr = b""

2299

try:

2300

key_id = self.key_id(

2301

self.peer_certificate(session))

2302

except (TypeError, gnutls.Error) as error:

2303

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

2304

return

2305

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

2306

2307

else:

2308

key_id = b""

2309

try:

2310

fpr = self.fingerprint(

2311

self.peer_certificate(session))

2312

except (TypeError, gnutls.Error) as error:

2313

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

2314

return

2315

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

2316

2317

try:

2318

client = ProxyClient(child_pipe, key_id, fpr,

1705

2319

self.client_address)

1706

2320

except KeyError:

1707

2321

return

1708

2322

1709

2323

if client.approval_delay:

1710

2324

delay = client.approval_delay

1711

2325

client.approvals_pending += 1

1712

2326

approval_required = True

1713

2327

1714

2328

while True:

1715

2329

if not client.enabled:

1716

2330

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

1717

client.name)

2331

client.name)

1718

2332

if self.server.use_dbus:

1719

2333

# Emit D-Bus signal

1720

2334

client.Rejected("Disabled")

1721

2335

return

1722

2336

1723

2337

if client.approved or not client.approval_delay:

1724

#We are approved or approval is disabled

2338

# We are approved or approval is disabled

1725

2339

break

1726

2340

elif client.approved is None:

1727

2341

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

1729

2343

if self.server.use_dbus:

1730

2344

# Emit D-Bus signal

1731

2345

client.NeedApproval(

1732

client.approval_delay_milliseconds(),

1733

client.approved_by_default)

2346

client.approval_delay.total_seconds()

2347

* 1000, client.approved_by_default)

1734

2348

else:

1735

2349

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

1736

2350

client.name)

1738

2352

# Emit D-Bus signal

1739

2353

client.Rejected("Denied")

1740

2354

return

1741

1742

#wait until timeout or approved

2355

2356

# wait until timeout or approved

1743

2357

time = datetime.datetime.now()

1744

2358

client.changedstate.acquire()

1745

client.changedstate.wait(

1746

float(timedelta_to_milliseconds(delay)

1747

/ 1000))

2359

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

1748

2360

client.changedstate.release()

1749

2361

time2 = datetime.datetime.now()

1750

2362

if (time2 - time) >= delay:

1760

2372

break

1761

2373

else:

1762

2374

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

2375

2376

try:

2377

session.send(client.secret)

2378

except gnutls.Error as error:

2379

logger.warning("gnutls send failed",

2380

exc_info=error)

2381

return

2382

1777

2383

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

1778

2384

# bump the timeout using extended_timeout

1779

2385

client.bump_timeout(client.extended_timeout)

1780

2386

if self.server.use_dbus:

1781

2387

# Emit D-Bus signal

1782

2388

client.GotSecret()

1783

2389

1784

2390

finally:

1785

2391

if approval_required:

1786

2392

client.approvals_pending -= 1

1787

2393

try:

1788

2394

session.bye()

1789

except gnutls.errors.GNUTLSError as error:

2395

except gnutls.Error as error:

1790

2396

logger.warning("GnuTLS bye failed",

1791

2397

exc_info=error)

1792

2398

1793

2399

@staticmethod

1794

2400

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

2401

"Return the peer's certificate as a bytestring"

2402

try:

2403

cert_type = gnutls.certificate_type_get2(session._c_object,

2404

gnutls.CTYPE_PEERS)

2405

except AttributeError:

2406

cert_type = gnutls.certificate_type_get(session._c_object)

2407

if gnutls.has_rawpk:

2408

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2409

else:

2410

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2411

# If not a valid certificate type...

2412

if cert_type not in valid_cert_types:

2413

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

2414

valid_cert_types)

2415

# ...return invalid data

2416

return b""

1802

2417

list_size = ctypes.c_uint(1)

1803

cert_list = (gnutls.library.functions

1804

.gnutls_certificate_get_peers

2418

cert_list = (gnutls.certificate_get_peers

1805

2419

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

1806

2420

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

1807

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

1808

" certificate")

2421

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

1809

2422

if list_size.value == 0:

1810

2423

return None

1811

2424

cert = cert_list[0]

1812

2425

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

1813

2426

2427

@staticmethod

2428

def key_id(certificate):

2429

"Convert a certificate bytestring to a hexdigit key ID"

2430

# New GnuTLS "datum" with the public key

2431

datum = gnutls.datum_t(

2432

ctypes.cast(ctypes.c_char_p(certificate),

2433

ctypes.POINTER(ctypes.c_ubyte)),

2434

ctypes.c_uint(len(certificate)))

2435

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

2436

# New empty GnuTLS certificate

2437

pubkey = gnutls.pubkey_t()

2438

gnutls.pubkey_init(ctypes.byref(pubkey))

2439

# Import the raw public key into the certificate

2440

gnutls.pubkey_import(pubkey,

2441

ctypes.byref(datum),

2442

gnutls.X509_FMT_DER)

2443

# New buffer for the key ID

2444

buf = ctypes.create_string_buffer(32)

2445

buf_len = ctypes.c_size_t(len(buf))

2446

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

2447

gnutls.pubkey_get_key_id(pubkey,

2448

gnutls.KEYID_USE_SHA256,

2449

ctypes.cast(ctypes.byref(buf),

2450

ctypes.POINTER(ctypes.c_ubyte)),

2451

ctypes.byref(buf_len))

2452

# Deinit the certificate

2453

gnutls.pubkey_deinit(pubkey)

2454

2455

# Convert the buffer to a Python bytestring

2456

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

2457

# Convert the bytestring to hexadecimal notation

2458

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

2459

return hex_key_id

2460

1814

2461

@staticmethod

1815

2462

def fingerprint(openpgp):

1816

2463

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1817

2464

# 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))))

2465

datum = gnutls.datum_t(

2466

ctypes.cast(ctypes.c_char_p(openpgp),

2467

ctypes.POINTER(ctypes.c_ubyte)),

2468

ctypes.c_uint(len(openpgp)))

1823

2469

# 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)))

2470

crt = gnutls.openpgp_crt_t()

2471

gnutls.openpgp_crt_init(ctypes.byref(crt))

1827

2472

# 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))

2473

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

2474

gnutls.OPENPGP_FMT_RAW)

1832

2475

# Verify the self signature in the key

1833

2476

crtverify = ctypes.c_uint()

1834

(gnutls.library.functions

1835

.gnutls_openpgp_crt_verify_self(crt, 0,

1836

ctypes.byref(crtverify)))

2477

gnutls.openpgp_crt_verify_self(crt, 0,

2478

ctypes.byref(crtverify))

1837

2479

if crtverify.value != 0:

1838

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1839

raise (gnutls.errors.CertificateSecurityError

1840

("Verify failed"))

2480

gnutls.openpgp_crt_deinit(crt)

2481

raise gnutls.CertificateSecurityError(code

2482

=crtverify.value)

1841

2483

# New buffer for the fingerprint

1842

2484

buf = ctypes.create_string_buffer(20)

1843

2485

buf_len = ctypes.c_size_t()

1844

2486

# 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)))

2487

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

2488

ctypes.byref(buf_len))

1848

2489

# Deinit the certificate

1849

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2490

gnutls.openpgp_crt_deinit(crt)

1850

2491

# Convert the buffer to a Python bytestring

1851

2492

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

1852

2493

# Convert the bytestring to hexadecimal notation

1854

2495

return hex_fpr

1855

2496

1856

2497

1857

class MultiprocessingMixIn(object):

2498

class MultiprocessingMixIn:

1858

2499

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

2500

1859

2501

def sub_process_main(self, request, address):

1860

2502

try:

1861

2503

self.finish_request(request, address)

1862

2504

except Exception:

1863

2505

self.handle_error(request, address)

1864

2506

self.close_request(request)

1865

2507

1866

2508

def process_request(self, request, address):

1867

2509

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

1868

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

1869

args = (request, address))

2510

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

2511

args=(request, address))

1870

2512

proc.start()

1871

2513

return proc

1872

2514

1873

2515

1874

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2516

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1875

2517

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

2518

1876

2519

def process_request(self, request, client_address):

1877

2520

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

1878

2521

1879

2522

This function creates a new pipe in self.pipe

1880

2523

"""

1881

2524

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1882

2525

1883

2526

proc = MultiprocessingMixIn.process_request(self, request,

1884

2527

client_address)

1885

2528

self.child_pipe.close()

1886

2529

self.add_pipe(parent_pipe, proc)

1887

2530

1888

2531

def add_pipe(self, parent_pipe, proc):

1889

2532

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

1890

raise NotImplementedError

2533

raise NotImplementedError()

1891

2534

1892

2535

1893

2536

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1894

socketserver.TCPServer, object):

2537

socketserver.TCPServer):

1895

2538

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

1896

2539

1897

2540

Attributes:

1898

2541

enabled: Boolean; whether this server is activated yet

1899

2542

interface: None or a network interface name (string)

1900

2543

use_ipv6: Boolean; to use IPv6 or not

1901

2544

"""

2545

1902

2546

def __init__(self, server_address, RequestHandlerClass,

1903

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

2547

interface=None,

2548

use_ipv6=True,

2549

socketfd=None):

1904

2550

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

1905

2551

creating a new one with socket.socket().

1906

2552

"""

1912

2558

self.socketfd = socketfd

1913

2559

# Save the original socket.socket() function

1914

2560

self.socket_socket = socket.socket

2561

1915

2562

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

1916

#

2563

#

1917

2564

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

1918

2565

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

1919

2566

# patching socket.socket.)

1920

#

2567

#

1921

2568

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

1922

2569

@functools.wraps(socket.socket)

1923

2570

def socket_wrapper(*args, **kwargs):

1935

2582

# socket_wrapper(), if socketfd was set.

1936

2583

socketserver.TCPServer.__init__(self, server_address,

1937

2584

RequestHandlerClass)

1938

2585

1939

2586

def server_bind(self):

1940

2587

"""This overrides the normal server_bind() function

1941

2588

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

1942

2589

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

2590

global SO_BINDTODEVICE

1943

2591

if self.interface is not None:

1944

2592

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

2593

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

2594

# common enough.

2595

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

2596

SO_BINDTODEVICE = 25

2597

try:

2598

self.socket.setsockopt(

2599

socket.SOL_SOCKET, SO_BINDTODEVICE,

2600

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

2601

except socket.error as error:

2602

if error.errno == errno.EPERM:

2603

logger.error("No permission to bind to"

2604

" interface %s", self.interface)

2605

elif error.errno == errno.ENOPROTOOPT:

2606

logger.error("SO_BINDTODEVICE not available;"

2607

" cannot bind to interface %s",

2608

self.interface)

2609

elif error.errno == errno.ENODEV:

2610

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

2611

" cannot bind", self.interface)

2612

else:

2613

raise

1966

2614

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

1967

2615

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

2616

if self.server_address[1]:

2617

self.allow_reuse_address = True

1968

2618

if not self.server_address[0]:

1969

2619

if self.address_family == socket.AF_INET6:

1970

any_address = "::" # in6addr_any

2620

any_address = "::" # in6addr_any

1971

2621

else:

1972

any_address = socket.INADDR_ANY

2622

any_address = "0.0.0.0" # INADDR_ANY

1973

2623

self.server_address = (any_address,

1974

2624

self.server_address[1])

1975

2625

elif not self.server_address[1]:

1976

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

1977

0)

2626

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

1978

2627

# if self.interface:

1979

2628

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

1980

2629

# 0, # port

1986

2635

1987

2636

class MandosServer(IPv6_TCPServer):

1988

2637

"""Mandos server.

1989

2638

1990

2639

Attributes:

1991

2640

clients: set of Client objects

1992

2641

gnutls_priority GnuTLS priority string

1993

2642

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

1994

1995

Assumes a gobject.MainLoop event loop.

2643

2644

Assumes a GLib.MainLoop event loop.

1996

2645

"""

2646

1997

2647

def __init__(self, server_address, RequestHandlerClass,

1998

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

1999

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

2648

interface=None,

2649

use_ipv6=True,

2650

clients=None,

2651

gnutls_priority=None,

2652

use_dbus=True,

2653

socketfd=None):

2000

2654

self.enabled = False

2001

2655

self.clients = clients

2002

2656

if self.clients is None:

2005

2659

self.gnutls_priority = gnutls_priority

2006

2660

IPv6_TCPServer.__init__(self, server_address,

2007

2661

RequestHandlerClass,

2008

interface = interface,

2009

use_ipv6 = use_ipv6,

2010

socketfd = socketfd)

2662

interface=interface,

2663

use_ipv6=use_ipv6,

2664

socketfd=socketfd)

2665

2011

2666

def server_activate(self):

2012

2667

if self.enabled:

2013

2668

return socketserver.TCPServer.server_activate(self)

2014

2669

2015

2670

def enable(self):

2016

2671

self.enabled = True

2017

2672

2018

2673

def add_pipe(self, parent_pipe, proc):

2019

2674

# 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):

2675

GLib.io_add_watch(

2676

parent_pipe.fileno(),

2677

GLib.IO_IN | GLib.IO_HUP,

2678

functools.partial(self.handle_ipc,

2679

parent_pipe=parent_pipe,

2680

proc=proc))

2681

2682

def handle_ipc(self, source, condition,

2683

parent_pipe=None,

2684

proc=None,

2685

client_object=None):

2029

2686

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

2030

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

2687

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

2031

2688

# Wait for other process to exit

2032

2689

proc.join()

2033

2690

return False

2034

2691

2035

2692

# Read a request from the child

2036

2693

request = parent_pipe.recv()

2037

2694

command = request[0]

2038

2695

2039

2696

if command == 'init':

2040

fpr = request[1]

2041

address = request[2]

2042

2043

for c in self.clients.itervalues():

2044

if c.fingerprint == fpr:

2697

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

2698

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

2699

address = request[3]

2700

2701

for c in self.clients.values():

2702

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2703

continue

2704

if key_id and c.key_id == key_id:

2705

client = c

2706

break

2707

if fpr and c.fingerprint == fpr:

2045

2708

client = c

2046

2709

break

2047

2710

else:

2048

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

2049

"dress: %s", fpr, address)

2711

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

2712

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

2050

2713

if self.use_dbus:

2051

2714

# Emit D-Bus signal

2052

mandos_dbus_service.ClientNotFound(fpr,

2715

mandos_dbus_service.ClientNotFound(key_id or fpr,

2053

2716

address[0])

2054

2717

parent_pipe.send(False)

2055

2718

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))

2719

2720

GLib.io_add_watch(

2721

parent_pipe.fileno(),

2722

GLib.IO_IN | GLib.IO_HUP,

2723

functools.partial(self.handle_ipc,

2724

parent_pipe=parent_pipe,

2725

proc=proc,

2726

client_object=client))

2065

2727

parent_pipe.send(True)

2066

2728

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

2067

2729

# same fileno

2070

2732

funcname = request[1]

2071

2733

args = request[2]

2072

2734

kwargs = request[3]

2073

2735

2074

2736

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

2075

2737

funcname)(*args,

2076

**kwargs)))

2077

2738

**kwargs)))

2739

2078

2740

if command == 'getattr':

2079

2741

attrname = request[1]

2080

if callable(client_object.__getattribute__(attrname)):

2081

parent_pipe.send(('function',))

2742

if isinstance(client_object.__getattribute__(attrname),

2743

collections.Callable):

2744

parent_pipe.send(('function', ))

2082

2745

else:

2083

parent_pipe.send(('data', client_object

2084

.__getattribute__(attrname)))

2085

2746

parent_pipe.send((

2747

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

2748

2086

2749

if command == 'setattr':

2087

2750

attrname = request[1]

2088

2751

value = request[2]

2089

2752

setattr(client_object, attrname, value)

2090

2753

2091

2754

return True

2092

2755

2093

2756

2094

2757

def rfc3339_duration_to_delta(duration):

2095

2758

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

2096

2759

2097

2760

>>> rfc3339_duration_to_delta("P7D")

2098

2761

datetime.timedelta(7)

2099

2762

>>> rfc3339_duration_to_delta("PT60S")

2109

2772

>>> rfc3339_duration_to_delta("P1DT3M20S")

2110

2773

datetime.timedelta(1, 200)

2111

2774

"""

2112

2775

2113

2776

# Parsing an RFC 3339 duration with regular expressions is not

2114

2777

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

2115

2778

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

2116

2779

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

2117

2780

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

2118

2781

# avoid excessive use of external libraries.

2119

2782

2120

2783

# 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

2784

Token = collections.namedtuple("Token", (

2785

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

2786

# a "group" containing digits

2787

"value", # datetime.timedelta or None

2788

"followers")) # Tokens valid after this token

2130

2789

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

2131

2790

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

2132

2791

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

2133

2792

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

2134

2793

datetime.timedelta(seconds=1),

2135

frozenset((token_end,)))

2794

frozenset((token_end, )))

2136

2795

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

2137

2796

datetime.timedelta(minutes=1),

2138

2797

frozenset((token_second, token_end)))

2154

2813

frozenset((token_month, token_end)))

2155

2814

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

2156

2815

datetime.timedelta(weeks=1),

2157

frozenset((token_end,)))

2816

frozenset((token_end, )))

2158

2817

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

2159

2818

frozenset((token_year, token_month,

2160

2819

token_day, token_time,

2161

token_week))),

2162

# Define starting values

2163

value = datetime.timedelta() # Value so far

2820

token_week)))

2821

# Define starting values:

2822

# Value so far

2823

value = datetime.timedelta()

2164

2824

found_token = None

2165

followers = frozenset(token_duration,) # Following valid tokens

2166

s = duration # String left to parse

2825

# Following valid tokens

2826

followers = frozenset((token_duration, ))

2827

# String left to parse

2828

s = duration

2167

2829

# Loop until end token is found

2168

2830

while found_token is not token_end:

2169

2831

# Search for any currently valid tokens

2185

2847

break

2186

2848

else:

2187

2849

# No currently valid tokens were found

2188

raise ValueError("Invalid RFC 3339 duration")

2850

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

2851

.format(duration))

2189

2852

# End token found

2190

2853

return value

2191

2854

2192

2855

2193

2856

def string_to_delta(interval):

2194

2857

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

2195

2858

2196

2859

>>> string_to_delta('7d')

2197

2860

datetime.timedelta(7)

2198

2861

>>> string_to_delta('60s')

2206

2869

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

2207

2870

datetime.timedelta(0, 330)

2208

2871

"""

2209

2872

2210

2873

try:

2211

2874

return rfc3339_duration_to_delta(interval)

2212

2875

except ValueError:

2213

2876

pass

2214

2877

2215

2878

timevalue = datetime.timedelta(0)

2216

2879

for s in interval.split():

2217

2880

try:

2218

suffix = unicode(s[-1])

2881

suffix = s[-1]

2219

2882

value = int(s[:-1])

2220

2883

if suffix == "d":

2221

2884

delta = datetime.timedelta(value)

2228

2891

elif suffix == "w":

2229

2892

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

2230

2893

else:

2231

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

2232

.format(suffix))

2233

except (ValueError, IndexError) as e:

2894

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

2895

except IndexError as e:

2234

2896

raise ValueError(*(e.args))

2235

2897

timevalue += delta

2236

2898

return timevalue

2237

2899

2238

2900

2239

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

2901

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

2240

2902

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

2241

2903

2242

2904

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

2243

2905

if os.fork():

2244

2906

sys.exit()

2252

2914

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

2253

2915

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

2254

2916

raise OSError(errno.ENODEV,

2255

"{0} not a character device"

2917

"{} not a character device"

2256

2918

.format(os.devnull))

2257

2919

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

2258

2920

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

2262

2924

2263

2925

2264

2926

def main():

2265

2927

2266

2928

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

2267

2929

# Parsing of options, both command line and config file

2268

2930

2269

2931

parser = argparse.ArgumentParser()

2270

2932

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

2271

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

2933

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

2272

2934

help="show version number and exit")

2273

2935

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

2274

2936

help="Bind to interface IF")

2280

2942

help="Run self-test")

2281

2943

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

2282

2944

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

2283

" to terminal")

2945

" to terminal", default=None)

2284

2946

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

2285

2947

help="Debug level for stdout output")

2286

2948

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

2293

2955

" files")

2294

2956

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

2295

2957

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

2296

" system bus interface")

2958

" system bus interface", default=None)

2297

2959

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

2298

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

2960

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

2961

default=None)

2299

2962

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

2300

2963

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

2301

" state")

2964

" state", default=None)

2302

2965

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

2303

2966

help="Specify a file descriptor to a network"

2304

2967

" socket to use instead of creating one")

2305

2968

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

2306

2969

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

2307

2970

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

2308

help="Run in foreground")

2309

2971

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

2972

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

2973

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

2974

default=None)

2975

2310

2976

options = parser.parse_args()

2311

2977

2312

2978

if options.check:

2313

2979

import doctest

2314

doctest.testmod()

2315

sys.exit()

2316

2980

fail_count, test_count = doctest.testmod()

2981

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

2982

2317

2983

# 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

2984

if gnutls.has_rawpk:

2985

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

2986

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

2987

else:

2988

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

2989

":+SIGN-DSA-SHA256")

2990

server_defaults = {"interface": "",

2991

"address": "",

2992

"port": "",

2993

"debug": "False",

2994

"priority": priority,

2995

"servicename": "Mandos",

2996

"use_dbus": "True",

2997

"use_ipv6": "True",

2998

"debuglevel": "",

2999

"restore": "True",

3000

"socket": "",

3001

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

3002

"foreground": "False",

3003

"zeroconf": "True",

3004

}

3005

del priority

3006

2334

3007

# Parse config file for server-global settings

2335

server_config = configparser.SafeConfigParser(server_defaults)

3008

server_config = configparser.ConfigParser(server_defaults)

2336

3009

del server_defaults

2337

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

2338

"mandos.conf"))

2339

# Convert the SafeConfigParser object to a dict

3010

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

3011

# Convert the ConfigParser object to a dict

2340

3012

server_settings = server_config.defaults()

2341

3013

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

2342

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

3014

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

3015

"foreground", "zeroconf"):

2343

3016

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

2344

3017

option)

2345

3018

if server_settings["port"]:

2355

3028

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

2356

3029

["socket"])

2357

3030

del server_config

2358

3031

2359

3032

# Override the settings from the config file with command line

2360

3033

# options, if set.

2361

3034

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

2362

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

2363

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

2364

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

3035

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

3036

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

3037

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

2365

3038

value = getattr(options, option)

2366

3039

if value is not None:

2367

3040

server_settings[option] = value

2368

3041

del options

2369

3042

# Force all strings to be unicode

2370

3043

for option in server_settings.keys():

2371

if type(server_settings[option]) is str:

2372

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

3044

if isinstance(server_settings[option], bytes):

3045

server_settings[option] = (server_settings[option]

3046

.decode("utf-8"))

3047

# Force all boolean options to be boolean

3048

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

3049

"foreground", "zeroconf"):

3050

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

2373

3051

# Debug implies foreground

2374

3052

if server_settings["debug"]:

2375

3053

server_settings["foreground"] = True

2376

3054

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

2377

3055

2378

3056

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

2379

3057

3058

if (not server_settings["zeroconf"]

3059

and not (server_settings["port"]

3060

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

3061

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

3062

2380

3063

# For convenience

2381

3064

debug = server_settings["debug"]

2382

3065

debuglevel = server_settings["debuglevel"]

2385

3068

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

2386

3069

stored_state_file)

2387

3070

foreground = server_settings["foreground"]

2388

3071

zeroconf = server_settings["zeroconf"]

3072

2389

3073

if debug:

2390

3074

initlogger(debug, logging.DEBUG)

2391

3075

else:

2394

3078

else:

2395

3079

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

2396

3080

initlogger(debug, level)

2397

3081

2398

3082

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

3083

syslogger.setFormatter(

3084

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

3085

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

3086

server_settings["servicename"])))

3087

2405

3088

# Parse config file with clients

2406

client_config = configparser.SafeConfigParser(Client

2407

.client_defaults)

3089

client_config = configparser.ConfigParser(Client.client_defaults)

2408

3090

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

2409

3091

"clients.conf"))

2410

3092

2411

3093

global mandos_dbus_service

2412

3094

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))

3095

3096

socketfd = None

3097

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

3098

socketfd = server_settings["socket"]

3099

tcp_server = MandosServer(

3100

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

3101

ClientHandler,

3102

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

3103

use_ipv6=use_ipv6,

3104

gnutls_priority=server_settings["priority"],

3105

use_dbus=use_dbus,

3106

socketfd=socketfd)

2425

3107

if not foreground:

2426

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

3108

pidfilename = "/run/mandos.pid"

3109

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

3110

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

2427

3111

pidfile = None

2428

3112

try:

2429

pidfile = open(pidfilename, "w")

3113

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

2430

3114

except IOError as e:

2431

3115

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

2432

3116

exc_info=e)

2433

2434

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

3117

3118

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

3119

("mandos", "mandos"),

3120

("nobody", "nogroup")):

2435

3121

try:

2436

3122

uid = pwd.getpwnam(name).pw_uid

2437

gid = pwd.getpwnam(name).pw_gid

3123

gid = pwd.getpwnam(group).pw_gid

2438

3124

break

2439

3125

except KeyError:

2440

3126

continue

2444

3130

try:

2445

3131

os.setgid(gid)

2446

3132

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

2447

3136

except OSError as error:

3137

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

3138

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

2448

3139

if error.errno != errno.EPERM:

2449

raise error

2450

3140

raise

3141

2451

3142

if debug:

2452

3143

# Enable all possible GnuTLS debugging

2453

3144

2454

3145

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

2455

3146

# - GnuTLS manual

2456

gnutls.library.functions.gnutls_global_set_log_level(11)

2457

2458

@gnutls.library.types.gnutls_log_func

3147

gnutls.global_set_log_level(11)

3148

3149

@gnutls.log_func

2459

3150

def debug_gnutls(level, string):

2460

3151

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

2461

2462

(gnutls.library.functions

2463

.gnutls_global_set_log_function(debug_gnutls))

2464

3152

3153

gnutls.global_set_log_function(debug_gnutls)

3154

2465

3155

# Redirect stdin so all checkers get /dev/null

2466

3156

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

2467

3157

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

2468

3158

if null > 2:

2469

3159

os.close(null)

2470

3160

2471

3161

# Need to fork before connecting to D-Bus

2472

3162

if not foreground:

2473

3163

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

2474

3164

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

3165

3166

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

3167

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

3168

# need to inform GLib that threads will be used.

3169

GLib.threads_init()

3170

2480

3171

global main_loop

2481

3172

# From the Avahi example code

2482

3173

DBusGMainLoop(set_as_default=True)

2483

main_loop = gobject.MainLoop()

3174

main_loop = GLib.MainLoop()

2484

3175

bus = dbus.SystemBus()

2485

3176

# End of Avahi example code

2486

3177

if use_dbus:

2487

3178

try:

2488

3179

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:

3180

bus,

3181

do_not_queue=True)

3182

old_bus_name = dbus.service.BusName(

3183

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

3184

do_not_queue=True)

3185

except dbus.exceptions.DBusException as e:

2494

3186

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

2495

3187

use_dbus = False

2496

3188

server_settings["use_dbus"] = False

2497

3189

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

3190

if zeroconf:

3191

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3192

service = AvahiServiceToSyslog(

3193

name=server_settings["servicename"],

3194

servicetype="_mandos._tcp",

3195

protocol=protocol,

3196

bus=bus)

3197

if server_settings["interface"]:

3198

service.interface = if_nametoindex(

3199

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

3200

2507

3201

global multiprocessing_manager

2508

3202

multiprocessing_manager = multiprocessing.Manager()

2509

3203

2510

3204

client_class = Client

2511

3205

if use_dbus:

2512

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

2513

3206

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

3207

2514

3208

client_settings = Client.config_parser(client_config)

2515

3209

old_client_settings = {}

2516

3210

clients_data = {}

2517

3211

3212

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

3213

global wnull

3214

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

3215

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

3216

# mode

3217

if debug or not foreground:

3218

wnull.close()

3219

2518

3220

# Get client data and settings from last running state.

2519

3221

if server_settings["restore"]:

2520

3222

try:

2521

3223

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

2522

clients_data, old_client_settings = (pickle.load

2523

(stored_state))

3224

if sys.version_info.major == 2:

3225

clients_data, old_client_settings = pickle.load(

3226

stored_state)

3227

else:

3228

bytes_clients_data, bytes_old_client_settings = (

3229

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

3230

# Fix bytes to strings

3231

# clients_data

3232

# .keys()

3233

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

3234

if isinstance(key, bytes)

3235

else key): value

3236

for key, value in

3237

bytes_clients_data.items()}

3238

del bytes_clients_data

3239

for key in clients_data:

3240

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

3241

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

3242

for k, v in

3243

clients_data[key].items()}

3244

clients_data[key] = value

3245

# .client_structure

3246

value["client_structure"] = [

3247

(s.decode("utf-8")

3248

if isinstance(s, bytes)

3249

else s) for s in

3250

value["client_structure"]]

3251

# .name & .host

3252

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

3253

if isinstance(value[k], bytes):

3254

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

3255

if "key_id" not in value:

3256

value["key_id"] = ""

3257

elif "fingerprint" not in value:

3258

value["fingerprint"] = ""

3259

# old_client_settings

3260

# .keys()

3261

old_client_settings = {

3262

(key.decode("utf-8")

3263

if isinstance(key, bytes)

3264

else key): value

3265

for key, value in

3266

bytes_old_client_settings.items()}

3267

del bytes_old_client_settings

3268

# .host

3269

for value in old_client_settings.values():

3270

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

3271

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

3272

.decode("utf-8"))

2524

3273

os.remove(stored_state_path)

2525

3274

except IOError as e:

2526

3275

if e.errno == errno.ENOENT:

2527

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

2528

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

3276

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

3277

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

2529

3278

else:

2530

3279

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

2531

3280

exc_info=e)

2532

3281

raise

2533

3282

except EOFError as e:

2534

3283

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

2535

"EOFError:", exc_info=e)

2536

3284

"EOFError:",

3285

exc_info=e)

3286

2537

3287

with PGPEngine() as pgp:

2538

for client_name, client in clients_data.iteritems():

3288

for client_name, client in clients_data.items():

3289

# Skip removed clients

3290

if client_name not in client_settings:

3291

continue

3292

2539

3293

# Decide which value to use after restoring saved state.

2540

3294

# We have three different values: Old config file,

2541

3295

# new config file, and saved state.

2546

3300

# For each value in new config, check if it

2547

3301

# differs from the old config value (Except for

2548

3302

# the "secret" attribute)

2549

if (name != "secret" and

2550

value != old_client_settings[client_name]

2551

[name]):

3303

if (name != "secret"

3304

and (value !=

3305

old_client_settings[client_name][name])):

2552

3306

client[name] = value

2553

3307

except KeyError:

2554

3308

pass

2555

3309

2556

3310

# Clients who has passed its expire date can still be

2557

# enabled if its last checker was successful. Clients

3311

# enabled if its last checker was successful. A Client

2558

3312

# whose checker succeeded before we stored its state is

2559

3313

# assumed to have successfully run all checkers during

2560

3314

# downtime.

2562

3316

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

2563

3317

if not client["last_checked_ok"]:

2564

3318

logger.warning(

2565

"disabling client {0} - Client never "

2566

"performed a successful checker"

2567

.format(client_name))

3319

"disabling client {} - Client never "

3320

"performed a successful checker".format(

3321

client_name))

2568

3322

client["enabled"] = False

2569

3323

elif client["last_checker_status"] != 0:

2570

3324

logger.warning(

2571

"disabling client {0} - Client "

2572

"last checker failed with error code {1}"

2573

.format(client_name,

2574

client["last_checker_status"]))

3325

"disabling client {} - Client last"

3326

" checker failed with error code"

3327

" {}".format(

3328

client_name,

3329

client["last_checker_status"]))

2575

3330

client["enabled"] = False

2576

3331

else:

2577

client["expires"] = (datetime.datetime

2578

.utcnow()

2579

+ client["timeout"])

3332

client["expires"] = (

3333

datetime.datetime.utcnow()

3334

+ client["timeout"])

2580

3335

logger.debug("Last checker succeeded,"

2581

" keeping {0} enabled"

2582

.format(client_name))

3336

" keeping {} enabled".format(

3337

client_name))

2583

3338

try:

2584

client["secret"] = (

2585

pgp.decrypt(client["encrypted_secret"],

2586

client_settings[client_name]

2587

["secret"]))

3339

client["secret"] = pgp.decrypt(

3340

client["encrypted_secret"],

3341

client_settings[client_name]["secret"])

2588

3342

except PGPError:

2589

3343

# 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

3344

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

3345

client_name))

3346

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

3347

["secret"])

3348

2595

3349

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

2596

3350

for client_name in (set(old_client_settings)

2597

3351

- set(client_settings)):

2599

3353

for client_name in (set(client_settings)

2600

3354

- set(old_client_settings)):

2601

3355

clients_data[client_name] = client_settings[client_name]

2602

3356

2603

3357

# Create all client objects

2604

for client_name, client in clients_data.iteritems():

3358

for client_name, client in clients_data.items():

2605

3359

tcp_server.clients[client_name] = client_class(

2606

name = client_name, settings = client)

2607

3360

name=client_name,

3361

settings=client,

3362

server_settings=server_settings)

3363

2608

3364

if not tcp_server.clients:

2609

3365

logger.warning("No clients defined")

2610

3366

2611

3367

if not foreground:

2612

3368

if pidfile is not None:

3369

pid = os.getpid()

2613

3370

try:

2614

3371

with pidfile:

2615

pid = os.getpid()

2616

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

3372

print(pid, file=pidfile)

2617

3373

except IOError:

2618

3374

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

2619

3375

pidfilename, pid)

2620

3376

del pidfile

2621

3377

del pidfilename

2622

2623

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

2624

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

2625

3378

3379

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

3380

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3381

lambda: main_loop.quit() and False)

3382

2626

3383

if use_dbus:

2627

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

2628

"se.bsnet.fukt.Mandos"})

2629

class MandosDBusService(DBusObjectWithProperties):

3384

3385

@alternate_dbus_interfaces(

3386

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

3387

class MandosDBusService(DBusObjectWithObjectManager):

2630

3388

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

3389

2631

3390

def __init__(self):

2632

3391

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

3392

2633

3393

_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

3394

2641

3395

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

2642

3396

def ClientAdded(self, objpath):

2643

3397

"D-Bus signal"

2644

3398

pass

2645

3399

2646

3400

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

2647

def ClientNotFound(self, fingerprint, address):

3401

def ClientNotFound(self, key_id, address):

2648

3402

"D-Bus signal"

2649

3403

pass

2650

3404

3405

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

3406

"true"})

2651

3407

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

2652

3408

def ClientRemoved(self, objpath, name):

2653

3409

"D-Bus signal"

2654

3410

pass

2655

3411

3412

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

3413

"true"})

2656

3414

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

2657

3415

def GetAllClients(self):

2658

3416

"D-Bus method"

2659

return dbus.Array(c.dbus_object_path

2660

for c in

2661

tcp_server.clients.itervalues())

2662

3417

return dbus.Array(c.dbus_object_path for c in

3418

tcp_server.clients.values())

3419

3420

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

3421

"true"})

2663

3422

@dbus.service.method(_interface,

2664

3423

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

2665

3424

def GetAllClientsWithProperties(self):

2666

3425

"D-Bus method"

2667

3426

return dbus.Dictionary(

2668

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

2669

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

3427

{c.dbus_object_path: c.GetAll(

3428

"se.recompile.Mandos.Client")

3429

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

2670

3430

signature="oa{sv}")

2671

3431

2672

3432

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

2673

3433

def RemoveClient(self, object_path):

2674

3434

"D-Bus method"

2675

for c in tcp_server.clients.itervalues():

3435

for c in tcp_server.clients.values():

2676

3436

if c.dbus_object_path == object_path:

2677

3437

del tcp_server.clients[c.name]

2678

3438

c.remove_from_connection()

2679

# Don't signal anything except ClientRemoved

3439

# Don't signal the disabling

2680

3440

c.disable(quiet=True)

2681

# Emit D-Bus signal

2682

self.ClientRemoved(object_path, c.name)

3441

# Emit D-Bus signal for removal

3442

self.client_removed_signal(c)

2683

3443

return

2684

3444

raise KeyError(object_path)

2685

3445

2686

3446

del _interface

2687

3447

3448

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3449

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

3450

def GetManagedObjects(self):

3451

"""D-Bus method"""

3452

return dbus.Dictionary(

3453

{client.dbus_object_path:

3454

dbus.Dictionary(

3455

{interface: client.GetAll(interface)

3456

for interface in

3457

client._get_all_interface_names()})

3458

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

3459

3460

def client_added_signal(self, client):

3461

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

3462

if use_dbus:

3463

# New standard signal

3464

self.InterfacesAdded(

3465

client.dbus_object_path,

3466

dbus.Dictionary(

3467

{interface: client.GetAll(interface)

3468

for interface in

3469

client._get_all_interface_names()}))

3470

# Old signal

3471

self.ClientAdded(client.dbus_object_path)

3472

3473

def client_removed_signal(self, client):

3474

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

3475

if use_dbus:

3476

# New standard signal

3477

self.InterfacesRemoved(

3478

client.dbus_object_path,

3479

client._get_all_interface_names())

3480

# Old signal

3481

self.ClientRemoved(client.dbus_object_path,

3482

client.name)

3483

2688

3484

mandos_dbus_service = MandosDBusService()

2689

3485

3486

# Save modules to variables to exempt the modules from being

3487

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

3488

mp = multiprocessing

3489

wn = wnull

3490

2690

3491

def cleanup():

2691

3492

"Cleanup function; run on exit"

2692

service.cleanup()

2693

2694

multiprocessing.active_children()

3493

if zeroconf:

3494

service.cleanup()

3495

3496

mp.active_children()

3497

wn.close()

2695

3498

if not (tcp_server.clients or client_settings):

2696

3499

return

2697

3500

2698

3501

# Store client before exiting. Secrets are encrypted with key

2699

3502

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

2700

3503

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

2701

3504

clients = {}

2702

3505

with PGPEngine() as pgp:

2703

for client in tcp_server.clients.itervalues():

3506

for client in tcp_server.clients.values():

2704

3507

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

2705

3508

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

2706

3509

key)

2707

3510

client_dict = {}

2708

3511

2709

3512

# A list of attributes that can not be pickled

2710

3513

# + secret.

2711

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

2712

"checker"))

2713

for name, typ in (inspect.getmembers

2714

(dbus.service.Object)):

3514

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

3515

"checker", "server_settings"}

3516

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

3517

.Object):

2715

3518

exclude.add(name)

2716

3519

2717

3520

client_dict["encrypted_secret"] = (client

2718

3521

.encrypted_secret)

2719

3522

for attr in client.client_structure:

2720

3523

if attr not in exclude:

2721

3524

client_dict[attr] = getattr(client, attr)

2722

3525

2723

3526

clients[client.name] = client_dict

2724

3527

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

2725

3528

2726

3529

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

3530

with tempfile.NamedTemporaryFile(

3531

mode='wb',

3532

suffix=".pickle",

3533

prefix='clients-',

3534

dir=os.path.dirname(stored_state_path),

3535

delete=False) as stored_state:

3536

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

3537

protocol=2)

3538

tempname = stored_state.name

2733

3539

os.rename(tempname, stored_state_path)

2734

3540

except (IOError, OSError) as e:

2735

3541

if not debug:

2738

3544

except NameError:

2739

3545

pass

2740

3546

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

2741

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

3547

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

2742

3548

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

2743

3549

else:

2744

3550

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

2745

3551

exc_info=e)

2746

raise e

2747

3552

raise

3553

2748

3554

# Delete all clients, and settings from config

2749

3555

while tcp_server.clients:

2750

3556

name, client = tcp_server.clients.popitem()

2751

3557

if use_dbus:

2752

3558

client.remove_from_connection()

2753

# Don't signal anything except ClientRemoved

3559

# Don't signal the disabling

2754

3560

client.disable(quiet=True)

3561

# Emit D-Bus signal for removal

2755

3562

if use_dbus:

2756

# Emit D-Bus signal

2757

mandos_dbus_service.ClientRemoved(client

2758

.dbus_object_path,

2759

client.name)

3563

mandos_dbus_service.client_removed_signal(client)

2760

3564

client_settings.clear()

2761

3565

2762

3566

atexit.register(cleanup)

2763

2764

for client in tcp_server.clients.itervalues():

3567

3568

for client in tcp_server.clients.values():

2765

3569

if use_dbus:

2766

# Emit D-Bus signal

2767

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3570

# Emit D-Bus signal for adding

3571

mandos_dbus_service.client_added_signal(client)

2768

3572

# Need to initiate checking of clients

2769

3573

if client.enabled:

2770

3574

client.init_checker()

2771

3575

2772

3576

tcp_server.enable()

2773

3577

tcp_server.server_activate()

2774

3578

2775

3579

# Find out what port we got

2776

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

3580

if zeroconf:

3581

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

2777

3582

if use_ipv6:

2778

3583

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

2779

3584

" flowinfo %d, scope_id %d",

2781

3586

else: # IPv4

2782

3587

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

2783

3588

*tcp_server.socket.getsockname())

2784

2785

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

2786

3589

3590

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

3591

2787

3592

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

3593

if zeroconf:

3594

# From the Avahi example code

3595

try:

3596

service.activate()

3597

except dbus.exceptions.DBusException as error:

3598

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

3599

cleanup()

3600

sys.exit(1)

3601

# End of Avahi example code

3602

3603

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

3604

lambda *args, **kwargs:

3605

(tcp_server.handle_request

3606

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

3607

2802

3608

logger.debug("Starting main loop")

2803

3609

main_loop.run()

2804

3610

except AvahiError as error:

2813

3619

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

2814

3620

cleanup()

2815

3621

3622

2816

3623

if __name__ == '__main__':

2817

3624

main()