/mandos/trunk : revision 977

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.2"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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

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with open(os.devnull, "w") as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull, "w") as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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

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self.value = value

217

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

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def __unicode__(self):

219

return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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321

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Attributes:

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

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Used to optionally bind to the specified interface.

234

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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340

def __init__(self,

341

interface=avahi.IF_UNSPEC,

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name=None,

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servicetype=None,

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port=None,

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TXT=None,

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domain="",

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host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

350

bus=None):

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self.interface = interface

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352

self.name = name

255

353

self.type = servicetype

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362

self.server = None

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363

self.bus = bus

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364

self.entry_group_state_changed_match = None

267

268

def rename(self):

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366

def rename(self, remove=True):

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

270

368

if self.rename_count >= self.max_renames:

271

369

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

272

370

" after %i retries, exiting.",

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self.rename_count)

274

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raise AvahiServiceError("Too many renames")

275

self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

373

self.name = str(

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self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

277

376

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

278

377

self.name)

279

self.remove()

378

if remove:

379

self.remove()

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380

try:

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381

self.add()

282

382

except dbus.exceptions.DBusException as error:

283

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

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

287

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

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392

def remove(self):

289

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

290

394

if self.entry_group_state_changed_match is not None:

292

396

self.entry_group_state_changed_match = None

293

397

if self.group is not None:

294

398

self.group.Reset()

295

399

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400

def add(self):

297

401

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

298

402

self.remove()

315

419

dbus.UInt16(self.port),

316

420

avahi.string_array_to_txt_array(self.TXT))

317

421

self.group.Commit()

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422

319

423

def entry_group_state_changed(self, state, error):

320

424

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

321

425

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

322

426

323

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

324

428

logger.debug("Zeroconf service established.")

325

429

elif state == avahi.ENTRY_GROUP_COLLISION:

327

431

self.rename()

328

432

elif state == avahi.ENTRY_GROUP_FAILURE:

329

433

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

330

unicode(error))

331

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

332

.format(error))

333

434

str(error))

435

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

436

334

437

def cleanup(self):

335

438

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

336

439

if self.group is not None:

341

444

pass

342

445

self.group = None

343

446

self.remove()

344

447

345

448

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

346

449

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

347

450

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

348

bad_states = { avahi.SERVER_INVALID:

349

"Zeroconf server invalid",

350

avahi.SERVER_REGISTERING: None,

351

avahi.SERVER_COLLISION:

352

"Zeroconf server name collision",

353

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

355

457

if state in bad_states:

356

458

if bad_states[state] is not None:

357

459

if error is None:

360

462

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

361

463

self.cleanup()

362

464

elif state == avahi.SERVER_RUNNING:

363

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

364

477

else:

365

478

if error is None:

366

479

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

367

480

else:

368

481

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

369

482

370

483

def activate(self):

371

484

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

372

485

if self.server is None:

376

489

follow_name_owner_changes=True),

377

490

avahi.DBUS_INTERFACE_SERVER)

378

491

self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

492

self.server_state_changed)

380

493

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

381

494

495

382

496

class AvahiServiceToSyslog(AvahiService):

383

def rename(self):

497

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

384

498

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

385

ret = AvahiService.rename(self)

386

syslogger.setFormatter(logging.Formatter

387

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

388

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

389

.format(self.name)))

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

390

503

return ret

391

504

392

def timedelta_to_milliseconds(td):

393

"Convert a datetime.timedelta() to milliseconds"

394

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

395

+ (td.seconds * 1000)

396

+ (td.microseconds // 1000))

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

_tls_rawpk_version = b"3.6.6"

518

519

def __init__(self):

520

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

521

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

522

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

523

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

524

.format(self._need_version))

525

526

# Unless otherwise indicated, the constants and types below are

527

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

528

529

# Constants

530

E_SUCCESS = 0

531

E_INTERRUPTED = -52

532

E_AGAIN = -28

533

CRT_OPENPGP = 2

534

CRT_RAWPK = 3

535

CLIENT = 2

536

SHUT_RDWR = 0

537

CRD_CERTIFICATE = 1

538

E_NO_CERTIFICATE_FOUND = -49

539

X509_FMT_DER = 0

540

NO_TICKETS = 1<<10

541

ENABLE_RAWPK = 1<<18

542

CTYPE_PEERS = 3

543

KEYID_USE_SHA256 = 1 # gnutls/x509.h

544

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

545

546

# Types

547

class session_int(ctypes.Structure):

548

_fields_ = []

549

session_t = ctypes.POINTER(session_int)

550

551

class certificate_credentials_st(ctypes.Structure):

552

_fields_ = []

553

certificate_credentials_t = ctypes.POINTER(

554

certificate_credentials_st)

555

certificate_type_t = ctypes.c_int

556

557

class datum_t(ctypes.Structure):

558

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

559

('size', ctypes.c_uint)]

560

561

class openpgp_crt_int(ctypes.Structure):

562

_fields_ = []

563

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

564

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

565

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

566

credentials_type_t = ctypes.c_int

567

transport_ptr_t = ctypes.c_void_p

568

close_request_t = ctypes.c_int

569

570

# Exceptions

571

class Error(Exception):

572

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

573

# exception might be raised from within GnuTLS.__init__,

574

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

575

# global variable has happened.

576

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

577

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

578

# code is passed, convert it to a string with

579

# gnutls.strerror()

580

self.code = code

581

if message is None and code is not None:

582

message = GnuTLS.strerror(code)

583

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

584

message, *args)

585

586

class CertificateSecurityError(Error):

587

pass

588

589

# Classes

590

class Credentials(object):

591

def __init__(self):

592

self._c_object = gnutls.certificate_credentials_t()

593

gnutls.certificate_allocate_credentials(

594

ctypes.byref(self._c_object))

595

self.type = gnutls.CRD_CERTIFICATE

596

597

def __del__(self):

598

gnutls.certificate_free_credentials(self._c_object)

599

600

class ClientSession(object):

601

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

602

self._c_object = gnutls.session_t()

603

gnutls_flags = gnutls.CLIENT

604

if gnutls.check_version("3.5.6"):

605

gnutls_flags |= gnutls.NO_TICKETS

606

if gnutls.has_rawpk:

607

gnutls_flags |= gnutls.ENABLE_RAWPK

608

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

609

del gnutls_flags

610

gnutls.set_default_priority(self._c_object)

611

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

612

gnutls.handshake_set_private_extensions(self._c_object,

613

True)

614

self.socket = socket

615

if credentials is None:

616

credentials = gnutls.Credentials()

617

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

618

ctypes.cast(credentials._c_object,

619

ctypes.c_void_p))

620

self.credentials = credentials

621

622

def __del__(self):

623

gnutls.deinit(self._c_object)

624

625

def handshake(self):

626

return gnutls.handshake(self._c_object)

627

628

def send(self, data):

629

data = bytes(data)

630

data_len = len(data)

631

while data_len > 0:

632

data_len -= gnutls.record_send(self._c_object,

633

data[-data_len:],

634

data_len)

635

636

def bye(self):

637

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

638

639

# Error handling functions

640

def _error_code(result):

641

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

642

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

643

if result >= 0:

644

return result

645

if result == gnutls.E_NO_CERTIFICATE_FOUND:

646

raise gnutls.CertificateSecurityError(code=result)

647

raise gnutls.Error(code=result)

648

649

def _retry_on_error(result, func, arguments):

650

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

651

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

652

while result < 0:

653

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

654

return _error_code(result)

655

result = func(*arguments)

656

return result

657

658

# Unless otherwise indicated, the function declarations below are

659

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

660

661

# Functions

662

priority_set_direct = _library.gnutls_priority_set_direct

663

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

664

ctypes.POINTER(ctypes.c_char_p)]

665

priority_set_direct.restype = _error_code

666

667

init = _library.gnutls_init

668

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

669

init.restype = _error_code

670

671

set_default_priority = _library.gnutls_set_default_priority

672

set_default_priority.argtypes = [session_t]

673

set_default_priority.restype = _error_code

674

675

record_send = _library.gnutls_record_send

676

record_send.argtypes = [session_t, ctypes.c_void_p,

677

ctypes.c_size_t]

678

record_send.restype = ctypes.c_ssize_t

679

record_send.errcheck = _retry_on_error

680

681

certificate_allocate_credentials = (

682

_library.gnutls_certificate_allocate_credentials)

683

certificate_allocate_credentials.argtypes = [

684

ctypes.POINTER(certificate_credentials_t)]

685

certificate_allocate_credentials.restype = _error_code

686

687

certificate_free_credentials = (

688

_library.gnutls_certificate_free_credentials)

689

certificate_free_credentials.argtypes = [

690

certificate_credentials_t]

691

certificate_free_credentials.restype = None

692

693

handshake_set_private_extensions = (

694

_library.gnutls_handshake_set_private_extensions)

695

handshake_set_private_extensions.argtypes = [session_t,

696

ctypes.c_int]

697

handshake_set_private_extensions.restype = None

698

699

credentials_set = _library.gnutls_credentials_set

700

credentials_set.argtypes = [session_t, credentials_type_t,

701

ctypes.c_void_p]

702

credentials_set.restype = _error_code

703

704

strerror = _library.gnutls_strerror

705

strerror.argtypes = [ctypes.c_int]

706

strerror.restype = ctypes.c_char_p

707

708

certificate_type_get = _library.gnutls_certificate_type_get

709

certificate_type_get.argtypes = [session_t]

710

certificate_type_get.restype = _error_code

711

712

certificate_get_peers = _library.gnutls_certificate_get_peers

713

certificate_get_peers.argtypes = [session_t,

714

ctypes.POINTER(ctypes.c_uint)]

715

certificate_get_peers.restype = ctypes.POINTER(datum_t)

716

717

global_set_log_level = _library.gnutls_global_set_log_level

718

global_set_log_level.argtypes = [ctypes.c_int]

719

global_set_log_level.restype = None

720

721

global_set_log_function = _library.gnutls_global_set_log_function

722

global_set_log_function.argtypes = [log_func]

723

global_set_log_function.restype = None

724

725

deinit = _library.gnutls_deinit

726

deinit.argtypes = [session_t]

727

deinit.restype = None

728

729

handshake = _library.gnutls_handshake

730

handshake.argtypes = [session_t]

731

handshake.restype = _error_code

732

handshake.errcheck = _retry_on_error

733

734

transport_set_ptr = _library.gnutls_transport_set_ptr

735

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

736

transport_set_ptr.restype = None

737

738

bye = _library.gnutls_bye

739

bye.argtypes = [session_t, close_request_t]

740

bye.restype = _error_code

741

bye.errcheck = _retry_on_error

742

743

check_version = _library.gnutls_check_version

744

check_version.argtypes = [ctypes.c_char_p]

745

check_version.restype = ctypes.c_char_p

746

747

has_rawpk = bool(check_version(_tls_rawpk_version))

748

749

if has_rawpk:

750

# Types

751

class pubkey_st(ctypes.Structure):

752

_fields = []

753

pubkey_t = ctypes.POINTER(pubkey_st)

754

755

x509_crt_fmt_t = ctypes.c_int

756

757

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

758

pubkey_init = _library.gnutls_pubkey_init

759

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

760

pubkey_init.restype = _error_code

761

762

pubkey_import = _library.gnutls_pubkey_import

763

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

764

x509_crt_fmt_t]

765

pubkey_import.restype = _error_code

766

767

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

768

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

769

ctypes.POINTER(ctypes.c_ubyte),

770

ctypes.POINTER(ctypes.c_size_t)]

771

pubkey_get_key_id.restype = _error_code

772

773

pubkey_deinit = _library.gnutls_pubkey_deinit

774

pubkey_deinit.argtypes = [pubkey_t]

775

pubkey_deinit.restype = None

776

else:

777

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

778

779

openpgp_crt_init = _library.gnutls_openpgp_crt_init

780

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

781

openpgp_crt_init.restype = _error_code

782

783

openpgp_crt_import = _library.gnutls_openpgp_crt_import

784

openpgp_crt_import.argtypes = [openpgp_crt_t,

785

ctypes.POINTER(datum_t),

786

openpgp_crt_fmt_t]

787

openpgp_crt_import.restype = _error_code

788

789

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

790

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

791

ctypes.POINTER(ctypes.c_uint)]

792

openpgp_crt_verify_self.restype = _error_code

793

794

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

795

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

796

openpgp_crt_deinit.restype = None

797

798

openpgp_crt_get_fingerprint = (

799

_library.gnutls_openpgp_crt_get_fingerprint)

800

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

801

ctypes.c_void_p,

802

ctypes.POINTER(

803

ctypes.c_size_t)]

804

openpgp_crt_get_fingerprint.restype = _error_code

805

806

if check_version("3.6.4"):

807

certificate_type_get2 = _library.gnutls_certificate_type_get2

808

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

809

certificate_type_get2.restype = _error_code

810

811

# Remove non-public functions

812

del _error_code, _retry_on_error

813

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

814

gnutls = GnuTLS()

815

816

817

def call_pipe(connection, # : multiprocessing.Connection

818

func, *args, **kwargs):

819

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

820

821

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

822

return value on the provided multiprocessing.Connection.

823

"""

824

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

825

connection.close()

826

397

827

398

828

class Client(object):

399

829

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

400

830

401

831

Attributes:

402

832

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

403

833

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

405

835

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

406

836

to see if the client lives.

407

837

'None' if no process is running.

408

checker_callback_tag: a gobject event source tag, or None

838

checker_callback_tag: a GLib event source tag, or None

409

839

checker_command: string; External command which is run to check

410

840

if client lives. %() expansions are done at

411

841

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

412

842

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

413

checker_initiator_tag: a gobject event source tag, or None

843

checker_initiator_tag: a GLib event source tag, or None

414

844

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

415

845

client_structure: Object describing what attributes a client has

416

846

and is used for storing the client at exit

417

847

current_checker_command: string; current running checker_command

418

disable_initiator_tag: a gobject event source tag, or None

848

disable_initiator_tag: a GLib event source tag, or None

419

849

enabled: bool()

420

850

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

421

uniquely identify the client

851

uniquely identify an OpenPGP client

852

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

853

a client using raw public keys

422

854

host: string; available for use by the checker command

423

855

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

424

856

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

426

858

last_checker_status: integer between 0 and 255 reflecting exit

427

859

status of last checker. -1 reflects crashed

428

860

checker, -2 means no checker completed yet.

861

last_checker_signal: The signal which killed the last checker, if

862

last_checker_status is -1

429

863

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

430

864

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

431

865

D-Bus identifiers

436

870

runtime_expansions: Allowed attributes for runtime expansion.

437

871

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

438

872

disabled, or None

873

server_settings: The server_settings dict from main()

439

874

"""

440

875

441

876

runtime_expansions = ("approval_delay", "approval_duration",

442

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

443

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

877

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

878

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

879

"last_approval_request", "last_checked_ok",

444

880

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

445

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

446

"extended_timeout": "15m",

447

"interval": "2m",

448

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

449

"host": "",

450

"approval_delay": "0s",

451

"approval_duration": "1s",

452

"approved_by_default": "True",

453

"enabled": "True",

454

}

455

456

def timeout_milliseconds(self):

457

"Return the 'timeout' attribute in milliseconds"

458

return timedelta_to_milliseconds(self.timeout)

459

460

def extended_timeout_milliseconds(self):

461

"Return the 'extended_timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.extended_timeout)

463

464

def interval_milliseconds(self):

465

"Return the 'interval' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.interval)

467

468

def approval_delay_milliseconds(self):

469

return timedelta_to_milliseconds(self.approval_delay)

470

881

client_defaults = {

882

"timeout": "PT5M",

883

"extended_timeout": "PT15M",

884

"interval": "PT2M",

885

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

886

"host": "",

887

"approval_delay": "PT0S",

888

"approval_duration": "PT1S",

889

"approved_by_default": "True",

890

"enabled": "True",

891

}

892

471

893

@staticmethod

472

894

def config_parser(config):

473

895

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

480

902

for client_name in config.sections():

481

903

section = dict(config.items(client_name))

482

904

client = settings[client_name] = {}

483

905

484

906

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

485

907

# Reformat values from string types to Python types

486

908

client["approved_by_default"] = config.getboolean(

487

909

client_name, "approved_by_default")

488

910

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

489

911

"enabled")

490

912

913

# Uppercase and remove spaces from key_id and fingerprint

914

# for later comparison purposes with return value from the

915

# key_id() and fingerprint() functions

916

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

917

.replace(" ", ""))

491

918

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

492

919

.replace(" ", ""))

493

920

if "secret" in section:

494

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

921

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

922

.encode("utf-8"),

923

"base64")

495

924

elif "secfile" in section:

496

925

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

497

926

(section["secfile"])),

498

927

"rb") as secfile:

499

928

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

500

929

else:

501

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

930

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

502

931

.format(section))

503

932

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

504

933

client["extended_timeout"] = string_to_delta(

512

941

client["last_approval_request"] = None

513

942

client["last_checked_ok"] = None

514

943

client["last_checker_status"] = -2

515

944

516

945

return settings

517

518

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

946

947

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

519

948

self.name = name

949

if server_settings is None:

950

server_settings = {}

951

self.server_settings = server_settings

520

952

# adding all client settings

521

for setting, value in settings.iteritems():

953

for setting, value in settings.items():

522

954

setattr(self, setting, value)

523

955

524

956

if self.enabled:

525

957

if not hasattr(self, "last_enabled"):

526

958

self.last_enabled = datetime.datetime.utcnow()

530

962

else:

531

963

self.last_enabled = None

532

964

self.expires = None

533

965

534

966

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

535

# Uppercase and remove spaces from fingerprint for later

536

# comparison purposes with return value from the fingerprint()

537

# function

967

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

538

968

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

539

969

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

540

970

datetime.datetime.utcnow())

541

971

542

972

# attributes specific for this server instance

543

973

self.checker = None

544

974

self.checker_initiator_tag = None

547

977

self.current_checker_command = None

548

978

self.approved = None

549

979

self.approvals_pending = 0

550

self.changedstate = (multiprocessing_manager

551

.Condition(multiprocessing_manager

552

.Lock()))

553

self.client_structure = [attr for attr in

554

self.__dict__.iterkeys()

980

self.changedstate = multiprocessing_manager.Condition(

981

multiprocessing_manager.Lock())

982

self.client_structure = [attr

983

for attr in self.__dict__.keys()

555

984

if not attr.startswith("_")]

556

985

self.client_structure.append("client_structure")

557

558

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

559

lambda obj:

560

isinstance(obj,

561

property)):

986

987

for name, t in inspect.getmembers(

988

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

562

989

if not name.startswith("_"):

563

990

self.client_structure.append(name)

564

991

565

992

# Send notice to process children that client state has changed

566

993

def send_changedstate(self):

567

994

with self.changedstate:

568

995

self.changedstate.notify_all()

569

996

570

997

def enable(self):

571

998

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

572

999

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

573

1000

# Already enabled

574

1001

return

575

self.send_changedstate()

576

1002

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

577

1003

self.enabled = True

578

1004

self.last_enabled = datetime.datetime.utcnow()

579

1005

self.init_checker()

580

1006

self.send_changedstate()

1007

581

1008

def disable(self, quiet=True):

582

1009

"""Disable this client."""

583

1010

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

584

1011

return False

585

1012

if not quiet:

586

self.send_changedstate()

587

if not quiet:

588

1013

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

589

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

590

gobject.source_remove(self.disable_initiator_tag)

1014

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

1015

GLib.source_remove(self.disable_initiator_tag)

591

1016

self.disable_initiator_tag = None

592

1017

self.expires = None

593

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

594

gobject.source_remove(self.checker_initiator_tag)

1018

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

1019

GLib.source_remove(self.checker_initiator_tag)

595

1020

self.checker_initiator_tag = None

596

1021

self.stop_checker()

597

1022

self.enabled = False

598

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

1023

if not quiet:

1024

self.send_changedstate()

1025

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

599

1026

return False

600

1027

601

1028

def __del__(self):

602

1029

self.disable()

603

1030

604

1031

def init_checker(self):

605

1032

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

606

1033

# and every interval from then on.

607

self.checker_initiator_tag = (gobject.timeout_add

608

(self.interval_milliseconds(),

609

self.start_checker))

1034

if self.checker_initiator_tag is not None:

1035

GLib.source_remove(self.checker_initiator_tag)

1036

self.checker_initiator_tag = GLib.timeout_add(

1037

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

1038

self.start_checker)

610

1039

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

611

self.disable_initiator_tag = (gobject.timeout_add

612

(self.timeout_milliseconds(),

613

self.disable))

1040

if self.disable_initiator_tag is not None:

1041

GLib.source_remove(self.disable_initiator_tag)

1042

self.disable_initiator_tag = GLib.timeout_add(

1043

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

614

1044

# Also start a new checker *right now*.

615

1045

self.start_checker()

616

617

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

1046

1047

def checker_callback(self, source, condition, connection,

1048

command):

618

1049

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

619

1050

self.checker_callback_tag = None

620

1051

self.checker = None

621

if os.WIFEXITED(condition):

622

self.last_checker_status = os.WEXITSTATUS(condition)

1052

# Read return code from connection (see call_pipe)

1053

returncode = connection.recv()

1054

connection.close()

1055

1056

if returncode >= 0:

1057

self.last_checker_status = returncode

1058

self.last_checker_signal = None

623

1059

if self.last_checker_status == 0:

624

1060

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

625

1061

vars(self))

626

1062

self.checked_ok()

627

1063

else:

628

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

629

vars(self))

1064

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

630

1065

else:

631

1066

self.last_checker_status = -1

1067

self.last_checker_signal = -returncode

632

1068

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

633

1069

vars(self))

634

1070

return False

1071

635

1072

def checked_ok(self):

636

1073

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

637

1074

self.last_checked_ok = datetime.datetime.utcnow()

638

1075

self.last_checker_status = 0

1076

self.last_checker_signal = None

639

1077

self.bump_timeout()

640

1078

641

1079

def bump_timeout(self, timeout=None):

642

1080

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

643

1081

if timeout is None:

644

1082

timeout = self.timeout

645

1083

if self.disable_initiator_tag is not None:

646

gobject.source_remove(self.disable_initiator_tag)

1084

GLib.source_remove(self.disable_initiator_tag)

1085

self.disable_initiator_tag = None

647

1086

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

648

self.disable_initiator_tag = (gobject.timeout_add

649

(timedelta_to_milliseconds

650

(timeout), self.disable))

1087

self.disable_initiator_tag = GLib.timeout_add(

1088

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

651

1089

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

652

1090

653

1091

def need_approval(self):

654

1092

self.last_approval_request = datetime.datetime.utcnow()

655

1093

656

1094

def start_checker(self):

657

1095

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

658

1096

659

1097

If a checker already exists, leave it running and do

660

1098

nothing."""

661

1099

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

666

1104

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

667

1105

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

668

1106

# should be.

669

670

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

671

try:

672

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

673

except (AttributeError, OSError) as error:

674

if (isinstance(error, OSError)

675

and error.errno != errno.ECHILD):

676

raise error

677

else:

678

if pid:

679

logger.warning("Checker was a zombie")

680

gobject.source_remove(self.checker_callback_tag)

681

self.checker_callback(pid, status,

682

self.current_checker_command)

1107

1108

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

1109

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

1110

self.checker.join()

1111

self.checker = None

683

1112

# Start a new checker if needed

684

1113

if self.checker is None:

1114

# Escape attributes for the shell

1115

escaped_attrs = {

1116

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

1117

for attr in self.runtime_expansions}

685

1118

try:

686

# In case checker_command has exactly one % operator

687

command = self.checker_command % self.host

688

except TypeError:

689

# Escape attributes for the shell

690

escaped_attrs = dict(

691

(attr,

692

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

693

errors=

694

'replace')))

695

for attr in

696

self.runtime_expansions)

697

698

try:

699

command = self.checker_command % escaped_attrs

700

except TypeError as error:

701

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

702

self.checker_command, exc_info=error)

703

return True # Try again later

1119

command = self.checker_command % escaped_attrs

1120

except TypeError as error:

1121

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

1122

self.checker_command,

1123

exc_info=error)

1124

return True # Try again later

704

1125

self.current_checker_command = command

705

try:

706

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

707

command, self.name)

708

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

709

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

710

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

711

# always replaced by /dev/null.)

712

self.checker = subprocess.Popen(command,

713

close_fds=True,

714

shell=True, cwd="/")

715

self.checker_callback_tag = (gobject.child_watch_add

716

(self.checker.pid,

717

self.checker_callback,

718

data=command))

719

# The checker may have completed before the gobject

720

# watch was added. Check for this.

721

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

722

if pid:

723

gobject.source_remove(self.checker_callback_tag)

724

self.checker_callback(pid, status, command)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

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

1126

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

1127

self.name)

1128

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

1129

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

1130

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

1131

# always replaced by /dev/null.)

1132

# The exception is when not debugging but nevertheless

1133

# running in the foreground; use the previously

1134

# created wnull.

1135

popen_args = {"close_fds": True,

1136

"shell": True,

1137

"cwd": "/"}

1138

if (not self.server_settings["debug"]

1139

and self.server_settings["foreground"]):

1140

popen_args.update({"stdout": wnull,

1141

"stderr": wnull})

1142

pipe = multiprocessing.Pipe(duplex=False)

1143

self.checker = multiprocessing.Process(

1144

target=call_pipe,

1145

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

1146

kwargs=popen_args)

1147

self.checker.start()

1148

self.checker_callback_tag = GLib.io_add_watch(

1149

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

1150

self.checker_callback, pipe[0], command)

1151

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

729

1152

return True

730

1153

731

1154

def stop_checker(self):

732

1155

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

733

1156

if self.checker_callback_tag:

734

gobject.source_remove(self.checker_callback_tag)

1157

GLib.source_remove(self.checker_callback_tag)

735

1158

self.checker_callback_tag = None

736

1159

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

737

1160

return

738

1161

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

739

try:

740

self.checker.terminate()

741

#time.sleep(0.5)

742

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

743

# self.checker.kill()

744

except OSError as error:

745

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

746

raise

1162

self.checker.terminate()

747

1163

self.checker = None

748

1164

749

1165

750

def dbus_service_property(dbus_interface, signature="v",

751

access="readwrite", byte_arrays=False):

1166

def dbus_service_property(dbus_interface,

1167

signature="v",

1168

access="readwrite",

1169

byte_arrays=False):

752

1170

"""Decorators for marking methods of a DBusObjectWithProperties to

753

1171

become properties on the D-Bus.

754

1172

755

1173

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

756

1174

and with one argument by "Set".

757

1175

758

1176

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

759

1177

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

760

1178

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

763

1181

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

764

1182

if byte_arrays and signature != "ay":

765

1183

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

766

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

1184

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

1185

767

1186

def decorator(func):

768

1187

func._dbus_is_property = True

769

1188

func._dbus_interface = dbus_interface

772

1191

func._dbus_name = func.__name__

773

1192

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

774

1193

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

775

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

776

1195

return func

1196

777

1197

return decorator

778

1198

779

1199

780

1200

def dbus_interface_annotations(dbus_interface):

781

1201

"""Decorator for marking functions returning interface annotations

782

1202

783

1203

Usage:

784

1204

785

1205

@dbus_interface_annotations("org.example.Interface")

786

1206

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

787

1207

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

788

1208

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

789

1209

"false"}

790

1210

"""

1211

791

1212

def decorator(func):

792

1213

func._dbus_is_interface = True

793

1214

func._dbus_interface = dbus_interface

794

1215

func._dbus_name = dbus_interface

795

1216

return func

1217

796

1218

return decorator

797

1219

798

1220

799

1221

def dbus_annotations(annotations):

800

1222

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

801

1223

Usage:

802

1224

1225

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

1226

"org.freedesktop.DBus.Property."

1227

"EmitsChangedSignal": "false"})

803

1228

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

804

1229

access="r")

805

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

806

"org.freedesktop.DBus.Property."

807

"EmitsChangedSignal": "false"})

808

1230

def Property_dbus_property(self):

809

1231

return dbus.Boolean(False)

1232

1233

See also the DBusObjectWithAnnotations class.

810

1234

"""

1235

811

1236

def decorator(func):

812

1237

func._dbus_annotations = annotations

813

1238

return func

1239

814

1240

return decorator

815

1241

816

1242

817

1243

class DBusPropertyException(dbus.exceptions.DBusException):

818

1244

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

819

1245

"""

820

def __unicode__(self):

821

return unicode(str(self))

1246

pass

822

1247

823

1248

824

1249

class DBusPropertyAccessException(DBusPropertyException):

833

1258

pass

834

1259

835

1260

836

class DBusObjectWithProperties(dbus.service.Object):

837

"""A D-Bus object with properties.

838

839

Classes inheriting from this can use the dbus_service_property

840

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

841

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

1261

class DBusObjectWithAnnotations(dbus.service.Object):

1262

"""A D-Bus object with annotations.

1263

1264

Classes inheriting from this can use the dbus_annotations

1265

decorator to add annotations to methods or signals.

842

1266

"""

843

1267

844

1268

@staticmethod

845

1269

def _is_dbus_thing(thing):

846

1270

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

847

1271

848

1272

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

849

1273

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

850

1274

"""

851

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

1275

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

852

1276

False)

853

1277

854

1278

def _get_all_dbus_things(self, thing):

855

1279

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

856

1280

"""

857

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

858

name),

1281

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

859

1282

athing.__get__(self))

860

1283

for cls in self.__class__.__mro__

861

1284

for name, athing in

862

inspect.getmembers(cls,

863

self._is_dbus_thing(thing)))

864

1285

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

1286

1287

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1288

out_signature="s",

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1291

def Introspect(self, object_path, connection):

1292

"""Overloading of standard D-Bus method.

1293

1294

Inserts annotation tags on methods and signals.

1295

"""

1296

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

1297

connection)

1298

try:

1299

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

1300

1301

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

1302

# Add annotation tags

1303

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

1304

for tag in if_tag.getElementsByTagName(typ):

1305

annots = dict()

1306

for name, prop in (self.

1307

_get_all_dbus_things(typ)):

1308

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

1309

and prop._dbus_interface

1310

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

1311

annots.update(getattr(

1312

prop, "_dbus_annotations", {}))

1313

for name, value in annots.items():

1314

ann_tag = document.createElement(

1315

"annotation")

1316

ann_tag.setAttribute("name", name)

1317

ann_tag.setAttribute("value", value)

1318

tag.appendChild(ann_tag)

1319

# Add interface annotation tags

1320

for annotation, value in dict(

1321

itertools.chain.from_iterable(

1322

annotations().items()

1323

for name, annotations

1324

in self._get_all_dbus_things("interface")

1325

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

1326

)).items():

1327

ann_tag = document.createElement("annotation")

1328

ann_tag.setAttribute("name", annotation)

1329

ann_tag.setAttribute("value", value)

1330

if_tag.appendChild(ann_tag)

1331

# Fix argument name for the Introspect method itself

1332

if (if_tag.getAttribute("name")

1333

== dbus.INTROSPECTABLE_IFACE):

1334

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

1335

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

1336

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

1337

if (arg.getAttribute("direction")

1338

== "out"):

1339

arg.setAttribute("name",

1340

"xml_data")

1341

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

1342

document.unlink()

1343

except (AttributeError, xml.dom.DOMException,

1344

xml.parsers.expat.ExpatError) as error:

1345

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

1346

exc_info=error)

1347

return xmlstring

1348

1349

1350

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1351

"""A D-Bus object with properties.

1352

1353

Classes inheriting from this can use the dbus_service_property

1354

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

1355

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

1356

"""

1357

865

1358

def _get_dbus_property(self, interface_name, property_name):

866

1359

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

867

1360

property with the specified name and interface.

868

1361

"""

869

for cls in self.__class__.__mro__:

870

for name, value in (inspect.getmembers

871

(cls,

872

self._is_dbus_thing("property"))):

1362

for cls in self.__class__.__mro__:

1363

for name, value in inspect.getmembers(

1364

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

873

1365

if (value._dbus_name == property_name

874

1366

and value._dbus_interface == interface_name):

875

1367

return value.__get__(self)

876

1368

877

1369

# No such property

878

raise DBusPropertyNotFound(self.dbus_object_path + ":"

879

+ interface_name + "."

880

+ property_name)

881

882

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

1370

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

1371

self.dbus_object_path, interface_name, property_name))

1372

1373

@classmethod

1374

def _get_all_interface_names(cls):

1375

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

1376

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

1377

"_dbus_interface", None)

1378

for x in (inspect.getmro(cls))

1379

for attr in dir(x))

1380

if name is not None)

1381

1382

@dbus.service.method(dbus.PROPERTIES_IFACE,

1383

in_signature="ss",

883

1384

out_signature="v")

884

1385

def Get(self, interface_name, property_name):

885

1386

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

891

1392

if not hasattr(value, "variant_level"):

892

1393

return value

893

1394

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

894

1395

895

1396

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

896

1397

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

897

1398

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

903

1404

# The byte_arrays option is not supported yet on

904

1405

# signatures other than "ay".

905

1406

if prop._dbus_signature != "ay":

906

raise ValueError

1407

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

1408

"'ay' signature {!r}"

1409

.format(prop._dbus_signature))

907

1410

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

908

1411

for byte in value))

909

1412

prop(value)

910

911

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

1413

1414

@dbus.service.method(dbus.PROPERTIES_IFACE,

1415

in_signature="s",

912

1416

out_signature="a{sv}")

913

1417

def GetAll(self, interface_name):

914

1418

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

915

1419

standard.

916

1420

917

1421

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

918

1422

"""

919

1423

properties = {}

929

1433

if not hasattr(value, "variant_level"):

930

1434

properties[name] = value

931

1435

continue

932

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

933

value.variant_level+1)

1436

properties[name] = type(value)(

1437

value, variant_level=value.variant_level + 1)

934

1438

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

935

1439

1440

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

1441

def PropertiesChanged(self, interface_name, changed_properties,

1442

invalidated_properties):

1443

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

1444

standard.

1445

"""

1446

pass

1447

936

1448

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

937

1449

out_signature="s",

938

1450

path_keyword='object_path',

939

1451

connection_keyword='connection')

940

1452

def Introspect(self, object_path, connection):

941

1453

"""Overloading of standard D-Bus method.

942

1454

943

1455

Inserts property tags and interface annotation tags.

944

1456

"""

945

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

946

connection)

1457

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1458

object_path,

1459

connection)

947

1460

try:

948

1461

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

1462

949

1463

def make_tag(document, name, prop):

950

1464

e = document.createElement("property")

951

1465

e.setAttribute("name", name)

952

1466

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

953

1467

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

954

1468

return e

1469

955

1470

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

956

1471

# Add property tags

957

1472

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

960

1475

if prop._dbus_interface

961

1476

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

962

1477

if_tag.appendChild(tag)

963

# Add annotation tags

964

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

965

for tag in if_tag.getElementsByTagName(typ):

966

annots = dict()

967

for name, prop in (self.

968

_get_all_dbus_things(typ)):

969

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

970

and prop._dbus_interface

971

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

972

annots.update(getattr

973

(prop,

974

"_dbus_annotations",

975

{}))

976

for name, value in annots.iteritems():

977

ann_tag = document.createElement(

978

"annotation")

979

ann_tag.setAttribute("name", name)

980

ann_tag.setAttribute("value", value)

981

tag.appendChild(ann_tag)

982

# Add interface annotation tags

983

for annotation, value in dict(

984

itertools.chain.from_iterable(

985

annotations().iteritems()

986

for name, annotations in

987

self._get_all_dbus_things("interface")

988

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

989

)).iteritems():

990

ann_tag = document.createElement("annotation")

991

ann_tag.setAttribute("name", annotation)

992

ann_tag.setAttribute("value", value)

993

if_tag.appendChild(ann_tag)

1478

# Add annotation tags for properties

1479

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

1480

annots = dict()

1481

for name, prop in self._get_all_dbus_things(

1482

"property"):

1483

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

1484

and prop._dbus_interface

1485

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

1486

annots.update(getattr(

1487

prop, "_dbus_annotations", {}))

1488

for name, value in annots.items():

1489

ann_tag = document.createElement(

1490

"annotation")

1491

ann_tag.setAttribute("name", name)

1492

ann_tag.setAttribute("value", value)

1493

tag.appendChild(ann_tag)

994

1494

# Add the names to the return values for the

995

1495

# "org.freedesktop.DBus.Properties" methods

996

1496

if (if_tag.getAttribute("name")

1015

1515

return xmlstring

1016

1516

1017

1517

1018

def datetime_to_dbus (dt, variant_level=0):

1518

try:

1519

dbus.OBJECT_MANAGER_IFACE

1520

except AttributeError:

1521

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

1522

1523

1524

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1525

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

1526

1527

Classes inheriting from this exposes the standard

1528

GetManagedObjects call and the InterfacesAdded and

1529

InterfacesRemoved signals on the standard

1530

"org.freedesktop.DBus.ObjectManager" interface.

1531

1532

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

1533

manually.

1534

"""

1535

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def GetManagedObjects(self):

1538

"""This function must be overridden"""

1539

raise NotImplementedError()

1540

1541

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1542

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

1543

def InterfacesAdded(self, object_path, interfaces_and_properties):

1544

pass

1545

1546

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

1547

def InterfacesRemoved(self, object_path, interfaces):

1548

pass

1549

1550

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1551

out_signature="s",

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1554

def Introspect(self, object_path, connection):

1555

"""Overloading of standard D-Bus method.

1556

1557

Override return argument name of GetManagedObjects to be

1558

"objpath_interfaces_and_properties"

1559

"""

1560

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1561

object_path,

1562

connection)

1563

try:

1564

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

1565

1566

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

1567

# Fix argument name for the GetManagedObjects method

1568

if (if_tag.getAttribute("name")

1569

== dbus.OBJECT_MANAGER_IFACE):

1570

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

1571

if (cn.getAttribute("name")

1572

== "GetManagedObjects"):

1573

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

1574

if (arg.getAttribute("direction")

1575

== "out"):

1576

arg.setAttribute(

1577

"name",

1578

"objpath_interfaces"

1579

"_and_properties")

1580

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

1581

document.unlink()

1582

except (AttributeError, xml.dom.DOMException,

1583

xml.parsers.expat.ExpatError) as error:

1584

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

1585

exc_info=error)

1586

return xmlstring

1587

1588

1589

def datetime_to_dbus(dt, variant_level=0):

1019

1590

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

1020

1591

if dt is None:

1021

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

1022

return dbus.String(dt.isoformat(),

1023

variant_level=variant_level)

1592

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

1593

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

1024

1594

1025

1595

1026

1596

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1028

1598

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

1029

1599

interface names according to the "alt_interface_names" mapping.

1030

1600

Usage:

1031

1032

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

1033

"net.example.AlternateInterface"})

1601

1602

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

1603

"net.example.AlternateInterface"})

1034

1604

class SampleDBusObject(dbus.service.Object):

1035

1605

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

1036

1606

def SampleDBusMethod():

1037

1607

pass

1038

1608

1039

1609

The above "SampleDBusMethod" on "SampleDBusObject" will be

1040

1610

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

1041

1611

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

1042

1612

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

1043

1613

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

1044

1614

1045

1615

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

1046

1616

(from DBusObjectWithProperties) and interfaces (from the

1047

1617

dbus_interface_annotations decorator).

1048

1618

"""

1619

1049

1620

def wrapper(cls):

1050

1621

for orig_interface_name, alt_interface_name in (

1051

alt_interface_names.iteritems()):

1622

alt_interface_names.items()):

1052

1623

attr = {}

1053

1624

interface_names = set()

1054

1625

# Go though all attributes of the class

1056

1627

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

1057

1628

# with the wrong interface name

1058

1629

if (not hasattr(attribute, "_dbus_interface")

1059

or not attribute._dbus_interface

1060

.startswith(orig_interface_name)):

1630

or not attribute._dbus_interface.startswith(

1631

orig_interface_name)):

1061

1632

continue

1062

1633

# Create an alternate D-Bus interface name based on

1063

1634

# the current name

1064

alt_interface = (attribute._dbus_interface

1065

.replace(orig_interface_name,

1066

alt_interface_name))

1635

alt_interface = attribute._dbus_interface.replace(

1636

orig_interface_name, alt_interface_name)

1067

1637

interface_names.add(alt_interface)

1068

1638

# Is this a D-Bus signal?

1069

1639

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

1070

# Extract the original non-method function by

1071

# black magic

1072

nonmethod_func = (dict(

1640

# Extract the original non-method undecorated

1641

# function by black magic

1642

if sys.version_info.major == 2:

1643

nonmethod_func = (dict(

1073

1644

zip(attribute.func_code.co_freevars,

1074

attribute.__closure__))["func"]

1075

.cell_contents)

1645

attribute.__closure__))

1646

["func"].cell_contents)

1647

else:

1648

nonmethod_func = (dict(

1649

zip(attribute.__code__.co_freevars,

1650

attribute.__closure__))

1651

["func"].cell_contents)

1076

1652

# Create a new, but exactly alike, function

1077

1653

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

1078

1654

# with the alternate D-Bus interface name

1079

new_function = (dbus.service.signal

1080

(alt_interface,

1081

attribute._dbus_signature)

1082

(types.FunctionType(

1083

nonmethod_func.func_code,

1084

nonmethod_func.func_globals,

1085

nonmethod_func.func_name,

1086

nonmethod_func.func_defaults,

1087

nonmethod_func.func_closure)))

1655

new_function = copy_function(nonmethod_func)

1656

new_function = (dbus.service.signal(

1657

alt_interface,

1658

attribute._dbus_signature)(new_function))

1088

1659

# Copy annotations, if any

1089

1660

try:

1090

new_function._dbus_annotations = (

1091

dict(attribute._dbus_annotations))

1661

new_function._dbus_annotations = dict(

1662

attribute._dbus_annotations)

1092

1663

except AttributeError:

1093

1664

pass

1665

1094

1666

# Define a creator of a function to call both the

1095

1667

# original and alternate functions, so both the

1096

1668

# original and alternate signals gets sent when

1099

1671

"""This function is a scope container to pass

1100

1672

func1 and func2 to the "call_both" function

1101

1673

outside of its arguments"""

1674

1675

@functools.wraps(func2)

1102

1676

def call_both(*args, **kwargs):

1103

1677

"""This function will emit two D-Bus

1104

1678

signals by calling func1 and func2"""

1105

1679

func1(*args, **kwargs)

1106

1680

func2(*args, **kwargs)

1681

# Make wrapper function look like a D-Bus

1682

# signal

1683

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

1684

if name.startswith("_dbus_"):

1685

setattr(call_both, name, attr)

1686

1107

1687

return call_both

1108

1688

# Create the "call_both" function and add it to

1109

1689

# the class

1114

1694

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

1115

1695

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

1116

1696

# to the class.

1117

attr[attrname] = (dbus.service.method

1118

(alt_interface,

1119

attribute._dbus_in_signature,

1120

attribute._dbus_out_signature)

1121

(types.FunctionType

1122

(attribute.func_code,

1123

attribute.func_globals,

1124

attribute.func_name,

1125

attribute.func_defaults,

1126

attribute.func_closure)))

1697

attr[attrname] = (

1698

dbus.service.method(

1699

alt_interface,

1700

attribute._dbus_in_signature,

1701

attribute._dbus_out_signature)

1702

(copy_function(attribute)))

1127

1703

# Copy annotations, if any

1128

1704

try:

1129

attr[attrname]._dbus_annotations = (

1130

dict(attribute._dbus_annotations))

1705

attr[attrname]._dbus_annotations = dict(

1706

attribute._dbus_annotations)

1131

1707

except AttributeError:

1132

1708

pass

1133

1709

# Is this a D-Bus property?

1136

1712

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

1137

1713

# property with the alternate D-Bus interface

1138

1714

# name. Add it to the class.

1139

attr[attrname] = (dbus_service_property

1140

(alt_interface,

1141

attribute._dbus_signature,

1142

attribute._dbus_access,

1143

attribute

1144

._dbus_get_args_options

1145

["byte_arrays"])

1146

(types.FunctionType

1147

(attribute.func_code,

1148

attribute.func_globals,

1149

attribute.func_name,

1150

attribute.func_defaults,

1151

attribute.func_closure)))

1715

attr[attrname] = (dbus_service_property(

1716

alt_interface, attribute._dbus_signature,

1717

attribute._dbus_access,

1718

attribute._dbus_get_args_options

1719

["byte_arrays"])

1720

(copy_function(attribute)))

1152

1721

# Copy annotations, if any

1153

1722

try:

1154

attr[attrname]._dbus_annotations = (

1155

dict(attribute._dbus_annotations))

1723

attr[attrname]._dbus_annotations = dict(

1724

attribute._dbus_annotations)

1156

1725

except AttributeError:

1157

1726

pass

1158

1727

# Is this a D-Bus interface?

1161

1730

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

1162

1731

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

1163

1732

# to the class.

1164

attr[attrname] = (dbus_interface_annotations

1165

(alt_interface)

1166

(types.FunctionType

1167

(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1733

attr[attrname] = (

1734

dbus_interface_annotations(alt_interface)

1735

(copy_function(attribute)))

1172

1736

if deprecate:

1173

1737

# Deprecate all alternate interfaces

1174

iname="_AlternateDBusNames_interface_annotation{0}"

1738

iname = "_AlternateDBusNames_interface_annotation{}"

1175

1739

for interface_name in interface_names:

1740

1176

1741

@dbus_interface_annotations(interface_name)

1177

1742

def func(self):

1178

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

1179

"true" }

1743

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

1744

"true"}

1180

1745

# Find an unused name

1181

1746

for aname in (iname.format(i)

1182

1747

for i in itertools.count()):

1186

1751

if interface_names:

1187

1752

# Replace the class with a new subclass of it with

1188

1753

# methods, signals, etc. as created above.

1189

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

1190

(cls,), attr)

1754

if sys.version_info.major == 2:

1755

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

1756

(cls, ), attr)

1757

else:

1758

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

1759

(cls, ), attr)

1191

1760

return cls

1761

1192

1762

return wrapper

1193

1763

1194

1764

1195

1765

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

1196

"se.bsnet.fukt.Mandos"})

1766

"se.bsnet.fukt.Mandos"})

1197

1767

class ClientDBus(Client, DBusObjectWithProperties):

1198

1768

"""A Client class using D-Bus

1199

1769

1200

1770

Attributes:

1201

1771

dbus_object_path: dbus.ObjectPath

1202

1772

bus: dbus.SystemBus()

1203

1773

"""

1204

1774

1205

1775

runtime_expansions = (Client.runtime_expansions

1206

+ ("dbus_object_path",))

1207

1776

+ ("dbus_object_path", ))

1777

1778

_interface = "se.recompile.Mandos.Client"

1779

1208

1780

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

1209

1210

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

1781

1782

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

1211

1783

self.bus = bus

1212

1784

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

1213

1785

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

1214

1786

# the D-Bus

1215

client_object_name = unicode(self.name).translate(

1787

client_object_name = str(self.name).translate(

1216

1788

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

1217

1789

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

1218

self.dbus_object_path = (dbus.ObjectPath

1219

("/clients/" + client_object_name))

1790

self.dbus_object_path = dbus.ObjectPath(

1791

"/clients/" + client_object_name)

1220

1792

DBusObjectWithProperties.__init__(self, self.bus,

1221

1793

self.dbus_object_path)

1222

1223

def notifychangeproperty(transform_func,

1224

dbus_name, type_func=lambda x: x,

1225

variant_level=1):

1794

1795

def notifychangeproperty(transform_func, dbus_name,

1796

type_func=lambda x: x,

1797

variant_level=1,

1798

invalidate_only=False,

1799

_interface=_interface):

1226

1800

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

1227

1801

its changes to DBus.

1228

1802

1229

1803

transform_fun: Function that takes a value and a variant_level

1230

1804

and transforms it to a D-Bus type.

1231

1805

dbus_name: D-Bus name of the variable

1233

1807

to the D-Bus. Default: no transform

1234

1808

variant_level: D-Bus variant level. Default: 1

1235

1809

"""

1236

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

1810

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

1811

1237

1812

def setter(self, value):

1238

1813

if hasattr(self, "dbus_object_path"):

1239

1814

if (not hasattr(self, attrname) or

1240

1815

type_func(getattr(self, attrname, None))

1241

1816

!= type_func(value)):

1242

dbus_value = transform_func(type_func(value),

1243

variant_level

1244

=variant_level)

1245

self.PropertyChanged(dbus.String(dbus_name),

1246

dbus_value)

1817

if invalidate_only:

1818

self.PropertiesChanged(

1819

_interface, dbus.Dictionary(),

1820

dbus.Array((dbus_name, )))

1821

else:

1822

dbus_value = transform_func(

1823

type_func(value),

1824

variant_level=variant_level)

1825

self.PropertyChanged(dbus.String(dbus_name),

1826

dbus_value)

1827

self.PropertiesChanged(

1828

_interface,

1829

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

1830

dbus_value}),

1831

dbus.Array())

1247

1832

setattr(self, attrname, value)

1248

1833

1249

1834

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

1250

1835

1251

1836

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1252

1837

approvals_pending = notifychangeproperty(dbus.Boolean,

1253

1838

"ApprovalPending",

1254

type_func = bool)

1839

type_func=bool)

1255

1840

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

1256

1841

last_enabled = notifychangeproperty(datetime_to_dbus,

1257

1842

"LastEnabled")

1258

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

1259

type_func = lambda checker:

1260

checker is not None)

1843

checker = notifychangeproperty(

1844

dbus.Boolean, "CheckerRunning",

1845

type_func=lambda checker: checker is not None)

1261

1846

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1262

1847

"LastCheckedOK")

1263

1848

last_checker_status = notifychangeproperty(dbus.Int16,

1266

1851

datetime_to_dbus, "LastApprovalRequest")

1267

1852

approved_by_default = notifychangeproperty(dbus.Boolean,

1268

1853

"ApprovedByDefault")

1269

approval_delay = notifychangeproperty(dbus.UInt64,

1270

"ApprovalDelay",

1271

type_func =

1272

timedelta_to_milliseconds)

1854

approval_delay = notifychangeproperty(

1855

dbus.UInt64, "ApprovalDelay",

1856

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

1273

1857

approval_duration = notifychangeproperty(

1274

1858

dbus.UInt64, "ApprovalDuration",

1275

type_func = timedelta_to_milliseconds)

1859

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

1276

1860

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

1277

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

1278

type_func =

1279

timedelta_to_milliseconds)

1861

timeout = notifychangeproperty(

1862

dbus.UInt64, "Timeout",

1863

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

1280

1864

extended_timeout = notifychangeproperty(

1281

1865

dbus.UInt64, "ExtendedTimeout",

1282

type_func = timedelta_to_milliseconds)

1283

interval = notifychangeproperty(dbus.UInt64,

1284

"Interval",

1285

type_func =

1286

timedelta_to_milliseconds)

1866

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

1867

interval = notifychangeproperty(

1868

dbus.UInt64, "Interval",

1869

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

1287

1870

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

1288

1871

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

1872

invalidate_only=True)

1873

1289

1874

del notifychangeproperty

1290

1875

1291

1876

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

1292

1877

try:

1293

1878

self.remove_from_connection()

1296

1881

if hasattr(DBusObjectWithProperties, "__del__"):

1297

1882

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

1298

1883

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

1299

1300

def checker_callback(self, pid, condition, command,

1301

*args, **kwargs):

1302

self.checker_callback_tag = None

1303

self.checker = None

1304

if os.WIFEXITED(condition):

1305

exitstatus = os.WEXITSTATUS(condition)

1884

1885

def checker_callback(self, source, condition,

1886

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

1887

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

1888

connection, command, *args,

1889

**kwargs)

1890

exitstatus = self.last_checker_status

1891

if exitstatus >= 0:

1306

1892

# Emit D-Bus signal

1307

1893

self.CheckerCompleted(dbus.Int16(exitstatus),

1308

dbus.Int64(condition),

1894

# This is specific to GNU libC

1895

dbus.Int64(exitstatus << 8),

1309

1896

dbus.String(command))

1310

1897

else:

1311

1898

# Emit D-Bus signal

1312

1899

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

1313

dbus.Int64(condition),

1900

dbus.Int64(

1901

# This is specific to GNU libC

1902

(exitstatus << 8)

1903

| self.last_checker_signal),

1314

1904

dbus.String(command))

1315

1316

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

1317

*args, **kwargs)

1318

1905

return ret

1906

1319

1907

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

1320

old_checker = self.checker

1321

if self.checker is not None:

1322

old_checker_pid = self.checker.pid

1323

else:

1324

old_checker_pid = None

1908

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

1325

1909

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

1326

1910

# Only if new checker process was started

1327

1911

if (self.checker is not None

1329

1913

# Emit D-Bus signal

1330

1914

self.CheckerStarted(self.current_checker_command)

1331

1915

return r

1332

1916

1333

1917

def _reset_approved(self):

1334

1918

self.approved = None

1335

1919

return False

1336

1920

1337

1921

def approve(self, value=True):

1338

self.send_changedstate()

1339

1922

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1343

1344

## D-Bus methods, signals & properties

1345

_interface = "se.recompile.Mandos.Client"

1346

1347

## Interfaces

1348

1349

@dbus_interface_annotations(_interface)

1350

def _foo(self):

1351

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

1352

"false"}

1353

1354

## Signals

1355

1923

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

1924

* 1000), self._reset_approved)

1925

self.send_changedstate()

1926

1927

# D-Bus methods, signals & properties

1928

1929

# Interfaces

1930

1931

# Signals

1932

1356

1933

# CheckerCompleted - signal

1357

1934

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

1358

1935

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

1359

1936

"D-Bus signal"

1360

1937

pass

1361

1938

1362

1939

# CheckerStarted - signal

1363

1940

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

1364

1941

def CheckerStarted(self, command):

1365

1942

"D-Bus signal"

1366

1943

pass

1367

1944

1368

1945

# PropertyChanged - signal

1946

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

1369

1947

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

1370

1948

def PropertyChanged(self, property, value):

1371

1949

"D-Bus signal"

1372

1950

pass

1373

1951

1374

1952

# GotSecret - signal

1375

1953

@dbus.service.signal(_interface)

1376

1954

def GotSecret(self):

1379

1957

server to mandos-client

1380

1958

"""

1381

1959

pass

1382

1960

1383

1961

# Rejected - signal

1384

1962

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

1385

1963

def Rejected(self, reason):

1386

1964

"D-Bus signal"

1387

1965

pass

1388

1966

1389

1967

# NeedApproval - signal

1390

1968

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

1391

1969

def NeedApproval(self, timeout, default):

1392

1970

"D-Bus signal"

1393

1971

return self.need_approval()

1394

1395

## Methods

1396

1972

1973

# Methods

1974

1397

1975

# Approve - method

1398

1976

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

1399

1977

def Approve(self, value):

1400

1978

self.approve(value)

1401

1979

1402

1980

# CheckedOK - method

1403

1981

@dbus.service.method(_interface)

1404

1982

def CheckedOK(self):

1405

1983

self.checked_ok()

1406

1984

1407

1985

# Enable - method

1986

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

1408

1987

@dbus.service.method(_interface)

1409

1988

def Enable(self):

1410

1989

"D-Bus method"

1411

1990

self.enable()

1412

1991

1413

1992

# StartChecker - method

1993

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

1414

1994

@dbus.service.method(_interface)

1415

1995

def StartChecker(self):

1416

1996

"D-Bus method"

1417

1997

self.start_checker()

1418

1998

1419

1999

# Disable - method

2000

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

1420

2001

@dbus.service.method(_interface)

1421

2002

def Disable(self):

1422

2003

"D-Bus method"

1423

2004

self.disable()

1424

2005

1425

2006

# StopChecker - method

2007

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

1426

2008

@dbus.service.method(_interface)

1427

2009

def StopChecker(self):

1428

2010

self.stop_checker()

1429

1430

## Properties

1431

2011

2012

# Properties

2013

1432

2014

# ApprovalPending - property

1433

2015

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

1434

2016

def ApprovalPending_dbus_property(self):

1435

2017

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

1436

2018

1437

2019

# ApprovedByDefault - property

1438

@dbus_service_property(_interface, signature="b",

2020

@dbus_service_property(_interface,

2021

signature="b",

1439

2022

access="readwrite")

1440

2023

def ApprovedByDefault_dbus_property(self, value=None):

1441

2024

if value is None: # get

1442

2025

return dbus.Boolean(self.approved_by_default)

1443

2026

self.approved_by_default = bool(value)

1444

2027

1445

2028

# ApprovalDelay - property

1446

@dbus_service_property(_interface, signature="t",

2029

@dbus_service_property(_interface,

2030

signature="t",

1447

2031

access="readwrite")

1448

2032

def ApprovalDelay_dbus_property(self, value=None):

1449

2033

if value is None: # get

1450

return dbus.UInt64(self.approval_delay_milliseconds())

2034

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

2035

* 1000)

1451

2036

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

1452

2037

1453

2038

# ApprovalDuration - property

1454

@dbus_service_property(_interface, signature="t",

2039

@dbus_service_property(_interface,

2040

signature="t",

1455

2041

access="readwrite")

1456

2042

def ApprovalDuration_dbus_property(self, value=None):

1457

2043

if value is None: # get

1458

return dbus.UInt64(timedelta_to_milliseconds(

1459

self.approval_duration))

2044

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

2045

* 1000)

1460

2046

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

1461

2047

1462

2048

# Name - property

2049

@dbus_annotations(

2050

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

1463

2051

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

1464

2052

def Name_dbus_property(self):

1465

2053

return dbus.String(self.name)

1466

2054

2055

# KeyID - property

2056

@dbus_annotations(

2057

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

2058

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

2059

def KeyID_dbus_property(self):

2060

return dbus.String(self.key_id)

2061

1467

2062

# Fingerprint - property

2063

@dbus_annotations(

2064

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

1468

2065

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

1469

2066

def Fingerprint_dbus_property(self):

1470

2067

return dbus.String(self.fingerprint)

1471

2068

1472

2069

# Host - property

1473

@dbus_service_property(_interface, signature="s",

2070

@dbus_service_property(_interface,

2071

signature="s",

1474

2072

access="readwrite")

1475

2073

def Host_dbus_property(self, value=None):

1476

2074

if value is None: # get

1477

2075

return dbus.String(self.host)

1478

self.host = unicode(value)

1479

2076

self.host = str(value)

2077

1480

2078

# Created - property

2079

@dbus_annotations(

2080

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

1481

2081

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

1482

2082

def Created_dbus_property(self):

1483

2083

return datetime_to_dbus(self.created)

1484

2084

1485

2085

# LastEnabled - property

1486

2086

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

1487

2087

def LastEnabled_dbus_property(self):

1488

2088

return datetime_to_dbus(self.last_enabled)

1489

2089

1490

2090

# Enabled - property

1491

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1492

2093

access="readwrite")

1493

2094

def Enabled_dbus_property(self, value=None):

1494

2095

if value is None: # get

1497

2098

self.enable()

1498

2099

else:

1499

2100

self.disable()

1500

2101

1501

2102

# LastCheckedOK - property

1502

@dbus_service_property(_interface, signature="s",

2103

@dbus_service_property(_interface,

2104

signature="s",

1503

2105

access="readwrite")

1504

2106

def LastCheckedOK_dbus_property(self, value=None):

1505

2107

if value is not None:

1506

2108

self.checked_ok()

1507

2109

return

1508

2110

return datetime_to_dbus(self.last_checked_ok)

1509

2111

1510

2112

# LastCheckerStatus - property

1511

@dbus_service_property(_interface, signature="n",

1512

access="read")

2113

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

1513

2114

def LastCheckerStatus_dbus_property(self):

1514

2115

return dbus.Int16(self.last_checker_status)

1515

2116

1516

2117

# Expires - property

1517

2118

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

1518

2119

def Expires_dbus_property(self):

1519

2120

return datetime_to_dbus(self.expires)

1520

2121

1521

2122

# LastApprovalRequest - property

1522

2123

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

1523

2124

def LastApprovalRequest_dbus_property(self):

1524

2125

return datetime_to_dbus(self.last_approval_request)

1525

2126

1526

2127

# Timeout - property

1527

@dbus_service_property(_interface, signature="t",

2128

@dbus_service_property(_interface,

2129

signature="t",

1528

2130

access="readwrite")

1529

2131

def Timeout_dbus_property(self, value=None):

1530

2132

if value is None: # get

1531

return dbus.UInt64(self.timeout_milliseconds())

2133

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

2134

old_timeout = self.timeout

1532

2135

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

1533

# Reschedule timeout

2136

# Reschedule disabling

1534

2137

if self.enabled:

1535

2138

now = datetime.datetime.utcnow()

1536

time_to_die = timedelta_to_milliseconds(

1537

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

1538

if time_to_die <= 0:

2139

self.expires += self.timeout - old_timeout

2140

if self.expires <= now:

1539

2141

# The timeout has passed

1540

2142

self.disable()

1541

2143

else:

1542

self.expires = (now +

1543

datetime.timedelta(milliseconds =

1544

time_to_die))

1545

2144

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

1546

2145

is None):

1547

2146

return

1548

gobject.source_remove(self.disable_initiator_tag)

1549

self.disable_initiator_tag = (gobject.timeout_add

1550

(time_to_die,

1551

self.disable))

1552

2147

GLib.source_remove(self.disable_initiator_tag)

2148

self.disable_initiator_tag = GLib.timeout_add(

2149

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

2150

self.disable)

2151

1553

2152

# ExtendedTimeout - property

1554

@dbus_service_property(_interface, signature="t",

2153

@dbus_service_property(_interface,

2154

signature="t",

1555

2155

access="readwrite")

1556

2156

def ExtendedTimeout_dbus_property(self, value=None):

1557

2157

if value is None: # get

1558

return dbus.UInt64(self.extended_timeout_milliseconds())

2158

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

2159

* 1000)

1559

2160

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

1560

2161

1561

2162

# Interval - property

1562

@dbus_service_property(_interface, signature="t",

2163

@dbus_service_property(_interface,

2164

signature="t",

1563

2165

access="readwrite")

1564

2166

def Interval_dbus_property(self, value=None):

1565

2167

if value is None: # get

1566

return dbus.UInt64(self.interval_milliseconds())

2168

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

1567

2169

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

1568

2170

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

1569

2171

return

1570

2172

if self.enabled:

1571

2173

# 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

2174

GLib.source_remove(self.checker_initiator_tag)

2175

self.checker_initiator_tag = GLib.timeout_add(

2176

value, self.start_checker)

2177

self.start_checker() # Start one now, too

2178

1577

2179

# Checker - property

1578

@dbus_service_property(_interface, signature="s",

2180

@dbus_service_property(_interface,

2181

signature="s",

1579

2182

access="readwrite")

1580

2183

def Checker_dbus_property(self, value=None):

1581

2184

if value is None: # get

1582

2185

return dbus.String(self.checker_command)

1583

self.checker_command = unicode(value)

1584

2186

self.checker_command = str(value)

2187

1585

2188

# CheckerRunning - property

1586

@dbus_service_property(_interface, signature="b",

2189

@dbus_service_property(_interface,

2190

signature="b",

1587

2191

access="readwrite")

1588

2192

def CheckerRunning_dbus_property(self, value=None):

1589

2193

if value is None: # get

1592

2196

self.start_checker()

1593

2197

else:

1594

2198

self.stop_checker()

1595

2199

1596

2200

# ObjectPath - property

2201

@dbus_annotations(

2202

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

2203

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

1597

2204

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

1598

2205

def ObjectPath_dbus_property(self):

1599

return self.dbus_object_path # is already a dbus.ObjectPath

1600

2206

return self.dbus_object_path # is already a dbus.ObjectPath

2207

1601

2208

# Secret = property

1602

@dbus_service_property(_interface, signature="ay",

1603

access="write", byte_arrays=True)

2209

@dbus_annotations(

2210

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

2211

"invalidates"})

2212

@dbus_service_property(_interface,

2213

signature="ay",

2214

access="write",

2215

byte_arrays=True)

1604

2216

def Secret_dbus_property(self, value):

1605

self.secret = str(value)

1606

2217

self.secret = bytes(value)

2218

1607

2219

del _interface

1608

2220

1609

2221

1610

2222

class ProxyClient(object):

1611

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

2223

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

1612

2224

self._pipe = child_pipe

1613

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

2225

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

1614

2226

if not self._pipe.recv():

1615

raise KeyError()

1616

2227

raise KeyError(key_id or fpr)

2228

1617

2229

def __getattribute__(self, name):

1618

2230

if name == '_pipe':

1619

2231

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

1622

2234

if data[0] == 'data':

1623

2235

return data[1]

1624

2236

if data[0] == 'function':

2237

1625

2238

def func(*args, **kwargs):

1626

2239

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

1627

2240

return self._pipe.recv()[1]

2241

1628

2242

return func

1629

2243

1630

2244

def __setattr__(self, name, value):

1631

2245

if name == '_pipe':

1632

2246

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

1635

2249

1636

2250

class ClientHandler(socketserver.BaseRequestHandler, object):

1637

2251

"""A class to handle client connections.

1638

2252

1639

2253

Instantiated once for each connection to handle it.

1640

2254

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

1641

2255

1642

2256

def handle(self):

1643

2257

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

1644

2258

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

1645

unicode(self.client_address))

2259

str(self.client_address))

1646

2260

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

1647

2261

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"))

2262

2263

session = gnutls.ClientSession(self.request)

2264

2265

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

2266

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

2267

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

2268

# "+DHE-DSS"))

1663

2269

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

1664

2270

priority = self.server.gnutls_priority

1665

2271

if priority is None:

1666

2272

priority = "NORMAL"

1667

(gnutls.library.functions

1668

.gnutls_priority_set_direct(session._c_object,

1669

priority, None))

1670

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2276

1671

2277

# Start communication using the Mandos protocol

1672

2278

# Get protocol number

1673

2279

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

1674

2280

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

1675

2281

try:

1676

2282

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

1677

raise RuntimeError

2283

raise RuntimeError(line)

1678

2284

except (ValueError, IndexError, RuntimeError) as error:

1679

2285

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

1680

2286

return

1681

2287

1682

2288

# Start GnuTLS connection

1683

2289

try:

1684

2290

session.handshake()

1685

except gnutls.errors.GNUTLSError as error:

2291

except gnutls.Error as error:

1686

2292

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

1687

2293

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

1688

2294

# established. Just abandon the request.

1689

2295

return

1690

2296

logger.debug("Handshake succeeded")

1691

2297

1692

2298

approval_required = False

1693

2299

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,

2300

if gnutls.has_rawpk:

2301

fpr = ""

2302

try:

2303

key_id = self.key_id(

2304

self.peer_certificate(session))

2305

except (TypeError, gnutls.Error) as error:

2306

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

2307

return

2308

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

2309

2310

else:

2311

key_id = ""

2312

try:

2313

fpr = self.fingerprint(

2314

self.peer_certificate(session))

2315

except (TypeError, gnutls.Error) as error:

2316

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

2317

return

2318

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

2319

2320

try:

2321

client = ProxyClient(child_pipe, key_id, fpr,

1705

2322

self.client_address)

1706

2323

except KeyError:

1707

2324

return

1708

2325

1709

2326

if client.approval_delay:

1710

2327

delay = client.approval_delay

1711

2328

client.approvals_pending += 1

1712

2329

approval_required = True

1713

2330

1714

2331

while True:

1715

2332

if not client.enabled:

1716

2333

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

1717

client.name)

2334

client.name)

1718

2335

if self.server.use_dbus:

1719

2336

# Emit D-Bus signal

1720

2337

client.Rejected("Disabled")

1721

2338

return

1722

2339

1723

2340

if client.approved or not client.approval_delay:

1724

#We are approved or approval is disabled

2341

# We are approved or approval is disabled

1725

2342

break

1726

2343

elif client.approved is None:

1727

2344

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

1729

2346

if self.server.use_dbus:

1730

2347

# Emit D-Bus signal

1731

2348

client.NeedApproval(

1732

client.approval_delay_milliseconds(),

1733

client.approved_by_default)

2349

client.approval_delay.total_seconds()

2350

* 1000, client.approved_by_default)

1734

2351

else:

1735

2352

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

1736

2353

client.name)

1738

2355

# Emit D-Bus signal

1739

2356

client.Rejected("Denied")

1740

2357

return

1741

1742

#wait until timeout or approved

2358

2359

# wait until timeout or approved

1743

2360

time = datetime.datetime.now()

1744

2361

client.changedstate.acquire()

1745

(client.changedstate.wait

1746

(float(client.timedelta_to_milliseconds(delay)

1747

/ 1000)))

2362

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

1748

2363

client.changedstate.release()

1749

2364

time2 = datetime.datetime.now()

1750

2365

if (time2 - time) >= delay:

1760

2375

break

1761

2376

else:

1762

2377

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

2378

2379

try:

2380

session.send(client.secret)

2381

except gnutls.Error as error:

2382

logger.warning("gnutls send failed",

2383

exc_info=error)

2384

return

2385

1777

2386

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

1778

2387

# bump the timeout using extended_timeout

1779

2388

client.bump_timeout(client.extended_timeout)

1780

2389

if self.server.use_dbus:

1781

2390

# Emit D-Bus signal

1782

2391

client.GotSecret()

1783

2392

1784

2393

finally:

1785

2394

if approval_required:

1786

2395

client.approvals_pending -= 1

1787

2396

try:

1788

2397

session.bye()

1789

except gnutls.errors.GNUTLSError as error:

2398

except gnutls.Error as error:

1790

2399

logger.warning("GnuTLS bye failed",

1791

2400

exc_info=error)

1792

2401

1793

2402

@staticmethod

1794

2403

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

2404

"Return the peer's certificate as a bytestring"

2405

try:

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2408

except AttributeError:

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2410

if gnutls.has_rawpk:

2411

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2412

else:

2413

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2414

# If not a valid certificate type...

2415

if cert_type not in valid_cert_types:

2416

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

2417

valid_cert_types)

2418

# ...return invalid data

2419

return b""

1802

2420

list_size = ctypes.c_uint(1)

1803

cert_list = (gnutls.library.functions

1804

.gnutls_certificate_get_peers

2421

cert_list = (gnutls.certificate_get_peers

1805

2422

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

1806

2423

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

1807

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

1808

" certificate")

2424

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

1809

2425

if list_size.value == 0:

1810

2426

return None

1811

2427

cert = cert_list[0]

1812

2428

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

1813

2429

2430

@staticmethod

2431

def key_id(certificate):

2432

"Convert a certificate bytestring to a hexdigit key ID"

2433

# New GnuTLS "datum" with the public key

2434

datum = gnutls.datum_t(

2435

ctypes.cast(ctypes.c_char_p(certificate),

2436

ctypes.POINTER(ctypes.c_ubyte)),

2437

ctypes.c_uint(len(certificate)))

2438

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

2439

# New empty GnuTLS certificate

2440

pubkey = gnutls.pubkey_t()

2441

gnutls.pubkey_init(ctypes.byref(pubkey))

2442

# Import the raw public key into the certificate

2443

gnutls.pubkey_import(pubkey,

2444

ctypes.byref(datum),

2445

gnutls.X509_FMT_DER)

2446

# New buffer for the key ID

2447

buf = ctypes.create_string_buffer(32)

2448

buf_len = ctypes.c_size_t(len(buf))

2449

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

2450

gnutls.pubkey_get_key_id(pubkey,

2451

gnutls.KEYID_USE_SHA256,

2452

ctypes.cast(ctypes.byref(buf),

2453

ctypes.POINTER(ctypes.c_ubyte)),

2454

ctypes.byref(buf_len))

2455

# Deinit the certificate

2456

gnutls.pubkey_deinit(pubkey)

2457

2458

# Convert the buffer to a Python bytestring

2459

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

2460

# Convert the bytestring to hexadecimal notation

2461

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

2462

return hex_key_id

2463

1814

2464

@staticmethod

1815

2465

def fingerprint(openpgp):

1816

2466

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1817

2467

# 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))))

2468

datum = gnutls.datum_t(

2469

ctypes.cast(ctypes.c_char_p(openpgp),

2470

ctypes.POINTER(ctypes.c_ubyte)),

2471

ctypes.c_uint(len(openpgp)))

1823

2472

# 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)))

2473

crt = gnutls.openpgp_crt_t()

2474

gnutls.openpgp_crt_init(ctypes.byref(crt))

1827

2475

# 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))

2476

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

2477

gnutls.OPENPGP_FMT_RAW)

1832

2478

# Verify the self signature in the key

1833

2479

crtverify = ctypes.c_uint()

1834

(gnutls.library.functions

1835

.gnutls_openpgp_crt_verify_self(crt, 0,

1836

ctypes.byref(crtverify)))

2480

gnutls.openpgp_crt_verify_self(crt, 0,

2481

ctypes.byref(crtverify))

1837

2482

if crtverify.value != 0:

1838

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1839

raise (gnutls.errors.CertificateSecurityError

1840

("Verify failed"))

2483

gnutls.openpgp_crt_deinit(crt)

2484

raise gnutls.CertificateSecurityError(code

2485

=crtverify.value)

1841

2486

# New buffer for the fingerprint

1842

2487

buf = ctypes.create_string_buffer(20)

1843

2488

buf_len = ctypes.c_size_t()

1844

2489

# 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)))

2490

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

2491

ctypes.byref(buf_len))

1848

2492

# Deinit the certificate

1849

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2493

gnutls.openpgp_crt_deinit(crt)

1850

2494

# Convert the buffer to a Python bytestring

1851

2495

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

1852

2496

# Convert the bytestring to hexadecimal notation

1856

2500

1857

2501

class MultiprocessingMixIn(object):

1858

2502

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

2503

1859

2504

def sub_process_main(self, request, address):

1860

2505

try:

1861

2506

self.finish_request(request, address)

1862

2507

except Exception:

1863

2508

self.handle_error(request, address)

1864

2509

self.close_request(request)

1865

2510

1866

2511

def process_request(self, request, address):

1867

2512

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

1868

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

1869

args = (request, address))

2513

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

2514

args=(request, address))

1870

2515

proc.start()

1871

2516

return proc

1872

2517

1873

2518

1874

2519

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1875

2520

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

2521

1876

2522

def process_request(self, request, client_address):

1877

2523

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

1878

2524

1879

2525

This function creates a new pipe in self.pipe

1880

2526

"""

1881

2527

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1882

2528

1883

2529

proc = MultiprocessingMixIn.process_request(self, request,

1884

2530

client_address)

1885

2531

self.child_pipe.close()

1886

2532

self.add_pipe(parent_pipe, proc)

1887

2533

1888

2534

def add_pipe(self, parent_pipe, proc):

1889

2535

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

1890

raise NotImplementedError

2536

raise NotImplementedError()

1891

2537

1892

2538

1893

2539

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1894

2540

socketserver.TCPServer, object):

1895

2541

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

1896

2542

1897

2543

Attributes:

1898

2544

enabled: Boolean; whether this server is activated yet

1899

2545

interface: None or a network interface name (string)

1900

2546

use_ipv6: Boolean; to use IPv6 or not

1901

2547

"""

2548

1902

2549

def __init__(self, server_address, RequestHandlerClass,

1903

interface=None, use_ipv6=True):

2550

interface=None,

2551

use_ipv6=True,

2552

socketfd=None):

2553

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

2554

creating a new one with socket.socket().

2555

"""

1904

2556

self.interface = interface

1905

2557

if use_ipv6:

1906

2558

self.address_family = socket.AF_INET6

2559

if socketfd is not None:

2560

# Save the file descriptor

2561

self.socketfd = socketfd

2562

# Save the original socket.socket() function

2563

self.socket_socket = socket.socket

2564

2565

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

2566

#

2567

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

2568

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

2569

# patching socket.socket.)

2570

#

2571

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

2572

@functools.wraps(socket.socket)

2573

def socket_wrapper(*args, **kwargs):

2574

# Restore original function so subsequent calls are

2575

# not affected.

2576

socket.socket = self.socket_socket

2577

del self.socket_socket

2578

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

2579

# saved file descriptor.

2580

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

2581

# Replace socket.socket() function with wrapper

2582

socket.socket = socket_wrapper

2583

# The socketserver.TCPServer.__init__ will call

2584

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

2585

# socket_wrapper(), if socketfd was set.

1907

2586

socketserver.TCPServer.__init__(self, server_address,

1908

2587

RequestHandlerClass)

2588

1909

2589

def server_bind(self):

1910

2590

"""This overrides the normal server_bind() function

1911

2591

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

1912

2592

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

2593

global SO_BINDTODEVICE

1913

2594

if self.interface is not None:

1914

2595

if SO_BINDTODEVICE is None:

1915

logger.error("SO_BINDTODEVICE does not exist;"

1916

" cannot bind to interface %s",

1917

self.interface)

1918

else:

1919

try:

1920

self.socket.setsockopt(socket.SOL_SOCKET,

1921

SO_BINDTODEVICE,

1922

str(self.interface

1923

+ '\0'))

1924

except socket.error as error:

1925

if error[0] == errno.EPERM:

1926

logger.error("No permission to"

1927

" bind to interface %s",

1928

self.interface)

1929

elif error[0] == errno.ENOPROTOOPT:

1930

logger.error("SO_BINDTODEVICE not available;"

1931

" cannot bind to interface %s",

1932

self.interface)

1933

else:

1934

raise

2596

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

2597

# common enough.

2598

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

2599

SO_BINDTODEVICE = 25

2600

try:

2601

self.socket.setsockopt(

2602

socket.SOL_SOCKET, SO_BINDTODEVICE,

2603

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

2604

except socket.error as error:

2605

if error.errno == errno.EPERM:

2606

logger.error("No permission to bind to"

2607

" interface %s", self.interface)

2608

elif error.errno == errno.ENOPROTOOPT:

2609

logger.error("SO_BINDTODEVICE not available;"

2610

" cannot bind to interface %s",

2611

self.interface)

2612

elif error.errno == errno.ENODEV:

2613

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

2614

" cannot bind", self.interface)

2615

else:

2616

raise

1935

2617

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

1936

2618

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

1937

2619

if not self.server_address[0]:

1938

2620

if self.address_family == socket.AF_INET6:

1939

any_address = "::" # in6addr_any

2621

any_address = "::" # in6addr_any

1940

2622

else:

1941

any_address = socket.INADDR_ANY

2623

any_address = "0.0.0.0" # INADDR_ANY

1942

2624

self.server_address = (any_address,

1943

2625

self.server_address[1])

1944

2626

elif not self.server_address[1]:

1945

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

1946

0)

2627

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

1947

2628

# if self.interface:

1948

2629

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

1949

2630

# 0, # port

1955

2636

1956

2637

class MandosServer(IPv6_TCPServer):

1957

2638

"""Mandos server.

1958

2639

1959

2640

Attributes:

1960

2641

clients: set of Client objects

1961

2642

gnutls_priority GnuTLS priority string

1962

2643

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

1963

1964

Assumes a gobject.MainLoop event loop.

2644

2645

Assumes a GLib.MainLoop event loop.

1965

2646

"""

2647

1966

2648

def __init__(self, server_address, RequestHandlerClass,

1967

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

1968

gnutls_priority=None, use_dbus=True):

2649

interface=None,

2650

use_ipv6=True,

2651

clients=None,

2652

gnutls_priority=None,

2653

use_dbus=True,

2654

socketfd=None):

1969

2655

self.enabled = False

1970

2656

self.clients = clients

1971

2657

if self.clients is None:

1974

2660

self.gnutls_priority = gnutls_priority

1975

2661

IPv6_TCPServer.__init__(self, server_address,

1976

2662

RequestHandlerClass,

1977

interface = interface,

1978

use_ipv6 = use_ipv6)

2663

interface=interface,

2664

use_ipv6=use_ipv6,

2665

socketfd=socketfd)

2666

1979

2667

def server_activate(self):

1980

2668

if self.enabled:

1981

2669

return socketserver.TCPServer.server_activate(self)

1982

2670

1983

2671

def enable(self):

1984

2672

self.enabled = True

1985

2673

1986

2674

def add_pipe(self, parent_pipe, proc):

1987

2675

# Call "handle_ipc" for both data and EOF events

1988

gobject.io_add_watch(parent_pipe.fileno(),

1989

gobject.IO_IN | gobject.IO_HUP,

1990

functools.partial(self.handle_ipc,

1991

parent_pipe =

1992

parent_pipe,

1993

proc = proc))

1994

1995

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

1996

proc = None, client_object=None):

2676

GLib.io_add_watch(

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2679

functools.partial(self.handle_ipc,

2680

parent_pipe=parent_pipe,

2681

proc=proc))

2682

2683

def handle_ipc(self, source, condition,

2684

parent_pipe=None,

2685

proc=None,

2686

client_object=None):

1997

2687

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

1998

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

2688

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

1999

2689

# Wait for other process to exit

2000

2690

proc.join()

2001

2691

return False

2002

2692

2003

2693

# Read a request from the child

2004

2694

request = parent_pipe.recv()

2005

2695

command = request[0]

2006

2696

2007

2697

if command == 'init':

2008

fpr = request[1]

2009

address = request[2]

2010

2011

for c in self.clients.itervalues():

2012

if c.fingerprint == fpr:

2698

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

2699

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

2700

address = request[3]

2701

2702

for c in self.clients.values():

2703

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2704

continue

2705

if key_id and c.key_id == key_id:

2706

client = c

2707

break

2708

if fpr and c.fingerprint == fpr:

2013

2709

client = c

2014

2710

break

2015

2711

else:

2016

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

2017

"dress: %s", fpr, address)

2712

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

2713

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

2018

2714

if self.use_dbus:

2019

2715

# Emit D-Bus signal

2020

mandos_dbus_service.ClientNotFound(fpr,

2716

mandos_dbus_service.ClientNotFound(key_id or fpr,

2021

2717

address[0])

2022

2718

parent_pipe.send(False)

2023

2719

return False

2024

2025

gobject.io_add_watch(parent_pipe.fileno(),

2026

gobject.IO_IN | gobject.IO_HUP,

2027

functools.partial(self.handle_ipc,

2028

parent_pipe =

2029

parent_pipe,

2030

proc = proc,

2031

client_object =

2032

client))

2720

2721

GLib.io_add_watch(

2722

parent_pipe.fileno(),

2723

GLib.IO_IN | GLib.IO_HUP,

2724

functools.partial(self.handle_ipc,

2725

parent_pipe=parent_pipe,

2726

proc=proc,

2727

client_object=client))

2033

2728

parent_pipe.send(True)

2034

2729

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

2035

2730

# same fileno

2038

2733

funcname = request[1]

2039

2734

args = request[2]

2040

2735

kwargs = request[3]

2041

2736

2042

2737

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

2043

2738

funcname)(*args,

2044

**kwargs)))

2045

2739

**kwargs)))

2740

2046

2741

if command == 'getattr':

2047

2742

attrname = request[1]

2048

if callable(client_object.__getattribute__(attrname)):

2049

parent_pipe.send(('function',))

2743

if isinstance(client_object.__getattribute__(attrname),

2744

collections.Callable):

2745

parent_pipe.send(('function', ))

2050

2746

else:

2051

parent_pipe.send(('data', client_object

2052

.__getattribute__(attrname)))

2053

2747

parent_pipe.send((

2748

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

2749

2054

2750

if command == 'setattr':

2055

2751

attrname = request[1]

2056

2752

value = request[2]

2057

2753

setattr(client_object, attrname, value)

2058

2754

2059

2755

return True

2060

2756

2061

2757

2758

def rfc3339_duration_to_delta(duration):

2759

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

2760

2761

>>> rfc3339_duration_to_delta("P7D")

2762

datetime.timedelta(7)

2763

>>> rfc3339_duration_to_delta("PT60S")

2764

datetime.timedelta(0, 60)

2765

>>> rfc3339_duration_to_delta("PT60M")

2766

datetime.timedelta(0, 3600)

2767

>>> rfc3339_duration_to_delta("PT24H")

2768

datetime.timedelta(1)

2769

>>> rfc3339_duration_to_delta("P1W")

2770

datetime.timedelta(7)

2771

>>> rfc3339_duration_to_delta("PT5M30S")

2772

datetime.timedelta(0, 330)

2773

>>> rfc3339_duration_to_delta("P1DT3M20S")

2774

datetime.timedelta(1, 200)

2775

"""

2776

2777

# Parsing an RFC 3339 duration with regular expressions is not

2778

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

2779

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

2780

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

2781

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

2782

# avoid excessive use of external libraries.

2783

2784

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

2785

Token = collections.namedtuple("Token", (

2786

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

2787

# a "group" containing digits

2788

"value", # datetime.timedelta or None

2789

"followers")) # Tokens valid after this token

2790

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

2791

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

2792

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

2793

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

2794

datetime.timedelta(seconds=1),

2795

frozenset((token_end, )))

2796

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

2797

datetime.timedelta(minutes=1),

2798

frozenset((token_second, token_end)))

2799

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

2800

datetime.timedelta(hours=1),

2801

frozenset((token_minute, token_end)))

2802

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

2803

None,

2804

frozenset((token_hour, token_minute,

2805

token_second)))

2806

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

2807

datetime.timedelta(days=1),

2808

frozenset((token_time, token_end)))

2809

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

2810

datetime.timedelta(weeks=4),

2811

frozenset((token_day, token_end)))

2812

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

2813

datetime.timedelta(weeks=52),

2814

frozenset((token_month, token_end)))

2815

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

2816

datetime.timedelta(weeks=1),

2817

frozenset((token_end, )))

2818

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

2819

frozenset((token_year, token_month,

2820

token_day, token_time,

2821

token_week)))

2822

# Define starting values:

2823

# Value so far

2824

value = datetime.timedelta()

2825

found_token = None

2826

# Following valid tokens

2827

followers = frozenset((token_duration, ))

2828

# String left to parse

2829

s = duration

2830

# Loop until end token is found

2831

while found_token is not token_end:

2832

# Search for any currently valid tokens

2833

for token in followers:

2834

match = token.regexp.match(s)

2835

if match is not None:

2836

# Token found

2837

if token.value is not None:

2838

# Value found, parse digits

2839

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

2840

# Add to value so far

2841

value += factor * token.value

2842

# Strip token from string

2843

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

2844

# Go to found token

2845

found_token = token

2846

# Set valid next tokens

2847

followers = found_token.followers

2848

break

2849

else:

2850

# No currently valid tokens were found

2851

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

2852

.format(duration))

2853

# End token found

2854

return value

2855

2856

2062

2857

def string_to_delta(interval):

2063

2858

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

2064

2859

2065

2860

>>> string_to_delta('7d')

2066

2861

datetime.timedelta(7)

2067

2862

>>> string_to_delta('60s')

2075

2870

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

2076

2871

datetime.timedelta(0, 330)

2077

2872

"""

2873

2874

try:

2875

return rfc3339_duration_to_delta(interval)

2876

except ValueError:

2877

pass

2878

2078

2879

timevalue = datetime.timedelta(0)

2079

2880

for s in interval.split():

2080

2881

try:

2081

suffix = unicode(s[-1])

2882

suffix = s[-1]

2082

2883

value = int(s[:-1])

2083

2884

if suffix == "d":

2084

2885

delta = datetime.timedelta(value)

2091

2892

elif suffix == "w":

2092

2893

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

2093

2894

else:

2094

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

2095

.format(suffix))

2096

except (ValueError, IndexError) as e:

2895

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

2896

except IndexError as e:

2097

2897

raise ValueError(*(e.args))

2098

2898

timevalue += delta

2099

2899

return timevalue

2100

2900

2101

2901

2102

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

2902

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

2103

2903

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

2104

2904

2105

2905

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

2106

2906

if os.fork():

2107

2907

sys.exit()

2115

2915

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

2116

2916

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

2117

2917

raise OSError(errno.ENODEV,

2118

"{0} not a character device"

2918

"{} not a character device"

2119

2919

.format(os.devnull))

2120

2920

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

2121

2921

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

2125

2925

2126

2926

2127

2927

def main():

2128

2928

2129

2929

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

2130

2930

# Parsing of options, both command line and config file

2131

2931

2132

2932

parser = argparse.ArgumentParser()

2133

2933

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

2134

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

2934

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

2135

2935

help="show version number and exit")

2136

2936

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

2137

2937

help="Bind to interface IF")

2143

2943

help="Run self-test")

2144

2944

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

2145

2945

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

2146

" to terminal")

2946

" to terminal", default=None)

2147

2947

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

2148

2948

help="Debug level for stdout output")

2149

2949

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

2156

2956

" files")

2157

2957

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

2158

2958

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

2159

" system bus interface")

2959

" system bus interface", default=None)

2160

2960

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

2161

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

2961

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

2962

default=None)

2162

2963

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

2163

2964

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

2164

" state")

2965

" state", default=None)

2966

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

2967

help="Specify a file descriptor to a network"

2968

" socket to use instead of creating one")

2165

2969

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

2166

2970

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

2167

2971

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

2972

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

2973

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

2974

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

2975

default=None)

2976

2168

2977

options = parser.parse_args()

2169

2978

2170

2979

if options.check:

2171

2980

import doctest

2172

doctest.testmod()

2173

sys.exit()

2174

2981

fail_count, test_count = doctest.testmod()

2982

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

2983

2175

2984

# Default values for config file for server-global settings

2176

server_defaults = { "interface": "",

2177

"address": "",

2178

"port": "",

2179

"debug": "False",

2180

"priority":

2181

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

2182

"servicename": "Mandos",

2183

"use_dbus": "True",

2184

"use_ipv6": "True",

2185

"debuglevel": "",

2186

"restore": "True",

2187

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

2188

}

2189

2985

if gnutls.has_rawpk:

2986

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

2987

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

2988

else:

2989

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

2990

":+SIGN-DSA-SHA256")

2991

server_defaults = {"interface": "",

2992

"address": "",

2993

"port": "",

2994

"debug": "False",

2995

"priority": priority,

2996

"servicename": "Mandos",

2997

"use_dbus": "True",

2998

"use_ipv6": "True",

2999

"debuglevel": "",

3000

"restore": "True",

3001

"socket": "",

3002

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

3003

"foreground": "False",

3004

"zeroconf": "True",

3005

}

3006

del priority

3007

2190

3008

# Parse config file for server-global settings

2191

3009

server_config = configparser.SafeConfigParser(server_defaults)

2192

3010

del server_defaults

2193

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

2194

"mandos.conf"))

3011

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

2195

3012

# Convert the SafeConfigParser object to a dict

2196

3013

server_settings = server_config.defaults()

2197

3014

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

2198

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

3015

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

3016

"foreground", "zeroconf"):

2199

3017

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

2200

3018

option)

2201

3019

if server_settings["port"]:

2202

3020

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

2203

3021

"port")

3022

if server_settings["socket"]:

3023

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

3024

"socket")

3025

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

3026

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

3027

# happen with a supplied network socket.

3028

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

3029

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

3030

["socket"])

2204

3031

del server_config

2205

3032

2206

3033

# Override the settings from the config file with command line

2207

3034

# options, if set.

2208

3035

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

2209

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

2210

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

2211

"statedir"):

3036

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

3037

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

3038

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

2212

3039

value = getattr(options, option)

2213

3040

if value is not None:

2214

3041

server_settings[option] = value

2215

3042

del options

2216

3043

# Force all strings to be unicode

2217

3044

for option in server_settings.keys():

2218

if type(server_settings[option]) is str:

2219

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

3045

if isinstance(server_settings[option], bytes):

3046

server_settings[option] = (server_settings[option]

3047

.decode("utf-8"))

3048

# Force all boolean options to be boolean

3049

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

3050

"foreground", "zeroconf"):

3051

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

3052

# Debug implies foreground

3053

if server_settings["debug"]:

3054

server_settings["foreground"] = True

2220

3055

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

2221

3056

2222

3057

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

2223

3058

3059

if (not server_settings["zeroconf"]

3060

and not (server_settings["port"]

3061

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

3062

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

3063

2224

3064

# For convenience

2225

3065

debug = server_settings["debug"]

2226

3066

debuglevel = server_settings["debuglevel"]

2228

3068

use_ipv6 = server_settings["use_ipv6"]

2229

3069

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

2230

3070

stored_state_file)

2231

3071

foreground = server_settings["foreground"]

3072

zeroconf = server_settings["zeroconf"]

3073

2232

3074

if debug:

2233

3075

initlogger(debug, logging.DEBUG)

2234

3076

else:

2237

3079

else:

2238

3080

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

2239

3081

initlogger(debug, level)

2240

3082

2241

3083

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

2242

syslogger.setFormatter(logging.Formatter

2243

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

2244

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

2245

.format(server_settings

2246

["servicename"])))

2247

3084

syslogger.setFormatter(

3085

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

3086

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

3087

server_settings["servicename"])))

3088

2248

3089

# Parse config file with clients

2249

3090

client_config = configparser.SafeConfigParser(Client

2250

3091

.client_defaults)

2251

3092

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

2252

3093

"clients.conf"))

2253

3094

2254

3095

global mandos_dbus_service

2255

3096

mandos_dbus_service = None

2256

2257

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

2258

server_settings["port"]),

2259

ClientHandler,

2260

interface=(server_settings["interface"]

2261

or None),

2262

use_ipv6=use_ipv6,

2263

gnutls_priority=

2264

server_settings["priority"],

2265

use_dbus=use_dbus)

2266

if not debug:

2267

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

3097

3098

socketfd = None

3099

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

3100

socketfd = server_settings["socket"]

3101

tcp_server = MandosServer(

3102

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

3103

ClientHandler,

3104

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

3105

use_ipv6=use_ipv6,

3106

gnutls_priority=server_settings["priority"],

3107

use_dbus=use_dbus,

3108

socketfd=socketfd)

3109

if not foreground:

3110

pidfilename = "/run/mandos.pid"

3111

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

3112

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

3113

pidfile = None

2268

3114

try:

2269

pidfile = open(pidfilename, "w")

3115

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

2270

3116

except IOError as e:

2271

3117

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

2272

3118

exc_info=e)

2273

2274

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

3119

3120

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

3121

("mandos", "mandos"),

3122

("nobody", "nogroup")):

2275

3123

try:

2276

3124

uid = pwd.getpwnam(name).pw_uid

2277

gid = pwd.getpwnam(name).pw_gid

3125

gid = pwd.getpwnam(group).pw_gid

2278

3126

break

2279

3127

except KeyError:

2280

3128

continue

2284

3132

try:

2285

3133

os.setgid(gid)

2286

3134

os.setuid(uid)

3135

if debug:

3136

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

3137

gid))

2287

3138

except OSError as error:

2288

if error[0] != errno.EPERM:

2289

raise error

2290

3139

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

3140

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

3141

if error.errno != errno.EPERM:

3142

raise

3143

2291

3144

if debug:

2292

3145

# Enable all possible GnuTLS debugging

2293

3146

2294

3147

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

2295

3148

# - GnuTLS manual

2296

gnutls.library.functions.gnutls_global_set_log_level(11)

2297

2298

@gnutls.library.types.gnutls_log_func

3149

gnutls.global_set_log_level(11)

3150

3151

@gnutls.log_func

2299

3152

def debug_gnutls(level, string):

2300

3153

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

2301

2302

(gnutls.library.functions

2303

.gnutls_global_set_log_function(debug_gnutls))

2304

3154

3155

gnutls.global_set_log_function(debug_gnutls)

3156

2305

3157

# Redirect stdin so all checkers get /dev/null

2306

3158

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

2307

3159

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

2308

3160

if null > 2:

2309

3161

os.close(null)

2310

3162

2311

3163

# Need to fork before connecting to D-Bus

2312

if not debug:

3164

if not foreground:

2313

3165

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

2314

3166

daemon()

2315

2316

gobject.threads_init()

2317

3167

3168

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

3169

# to inform GLib that threads will be used.

3170

GLib.threads_init()

3171

2318

3172

global main_loop

2319

3173

# From the Avahi example code

2320

3174

DBusGMainLoop(set_as_default=True)

2321

main_loop = gobject.MainLoop()

3175

main_loop = GLib.MainLoop()

2322

3176

bus = dbus.SystemBus()

2323

3177

# End of Avahi example code

2324

3178

if use_dbus:

2325

3179

try:

2326

3180

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

2327

bus, do_not_queue=True)

2328

old_bus_name = (dbus.service.BusName

2329

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

2330

do_not_queue=True))

2331

except dbus.exceptions.NameExistsException as e:

3181

bus,

3182

do_not_queue=True)

3183

old_bus_name = dbus.service.BusName(

3184

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

3185

do_not_queue=True)

3186

except dbus.exceptions.DBusException as e:

2332

3187

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

2333

3188

use_dbus = False

2334

3189

server_settings["use_dbus"] = False

2335

3190

tcp_server.use_dbus = False

2336

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2337

service = AvahiServiceToSyslog(name =

2338

server_settings["servicename"],

2339

servicetype = "_mandos._tcp",

2340

protocol = protocol, bus = bus)

2341

if server_settings["interface"]:

2342

service.interface = (if_nametoindex

2343

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

2344

3191

if zeroconf:

3192

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3193

service = AvahiServiceToSyslog(

3194

name=server_settings["servicename"],

3195

servicetype="_mandos._tcp",

3196

protocol=protocol,

3197

bus=bus)

3198

if server_settings["interface"]:

3199

service.interface = if_nametoindex(

3200

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

3201

2345

3202

global multiprocessing_manager

2346

3203

multiprocessing_manager = multiprocessing.Manager()

2347

3204

2348

3205

client_class = Client

2349

3206

if use_dbus:

2350

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

2351

3207

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

3208

2352

3209

client_settings = Client.config_parser(client_config)

2353

3210

old_client_settings = {}

2354

3211

clients_data = {}

2355

3212

3213

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

3214

global wnull

3215

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

3216

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

3217

# mode

3218

if debug or not foreground:

3219

wnull.close()

3220

2356

3221

# Get client data and settings from last running state.

2357

3222

if server_settings["restore"]:

2358

3223

try:

2359

3224

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

2360

clients_data, old_client_settings = (pickle.load

2361

(stored_state))

3225

if sys.version_info.major == 2:

3226

clients_data, old_client_settings = pickle.load(

3227

stored_state)

3228

else:

3229

bytes_clients_data, bytes_old_client_settings = (

3230

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

3231

# Fix bytes to strings

3232

# clients_data

3233

# .keys()

3234

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

3235

if isinstance(key, bytes)

3236

else key): value

3237

for key, value in

3238

bytes_clients_data.items()}

3239

del bytes_clients_data

3240

for key in clients_data:

3241

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

3242

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

3243

for k, v in

3244

clients_data[key].items()}

3245

clients_data[key] = value

3246

# .client_structure

3247

value["client_structure"] = [

3248

(s.decode("utf-8")

3249

if isinstance(s, bytes)

3250

else s) for s in

3251

value["client_structure"]]

3252

# .name & .host

3253

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

3254

if isinstance(value[k], bytes):

3255

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

3256

if not value.has_key("key_id"):

3257

value["key_id"] = ""

3258

elif not value.has_key("fingerprint"):

3259

value["fingerprint"] = ""

3260

# old_client_settings

3261

# .keys()

3262

old_client_settings = {

3263

(key.decode("utf-8")

3264

if isinstance(key, bytes)

3265

else key): value

3266

for key, value in

3267

bytes_old_client_settings.items()}

3268

del bytes_old_client_settings

3269

# .host

3270

for value in old_client_settings.values():

3271

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

3272

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

3273

.decode("utf-8"))

2362

3274

os.remove(stored_state_path)

2363

3275

except IOError as e:

2364

3276

if e.errno == errno.ENOENT:

2365

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

2366

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

3277

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

3278

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

2367

3279

else:

2368

3280

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

2369

3281

exc_info=e)

2370

3282

raise

2371

3283

except EOFError as e:

2372

3284

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

2373

"EOFError:", exc_info=e)

2374

3285

"EOFError:",

3286

exc_info=e)

3287

2375

3288

with PGPEngine() as pgp:

2376

for client_name, client in clients_data.iteritems():

3289

for client_name, client in clients_data.items():

3290

# Skip removed clients

3291

if client_name not in client_settings:

3292

continue

3293

2377

3294

# Decide which value to use after restoring saved state.

2378

3295

# We have three different values: Old config file,

2379

3296

# new config file, and saved state.

2384

3301

# For each value in new config, check if it

2385

3302

# differs from the old config value (Except for

2386

3303

# the "secret" attribute)

2387

if (name != "secret" and

2388

value != old_client_settings[client_name]

2389

[name]):

3304

if (name != "secret"

3305

and (value !=

3306

old_client_settings[client_name][name])):

2390

3307

client[name] = value

2391

3308

except KeyError:

2392

3309

pass

2393

3310

2394

3311

# Clients who has passed its expire date can still be

2395

# enabled if its last checker was successful. Clients

3312

# enabled if its last checker was successful. A Client

2396

3313

# whose checker succeeded before we stored its state is

2397

3314

# assumed to have successfully run all checkers during

2398

3315

# downtime.

2400

3317

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

2401

3318

if not client["last_checked_ok"]:

2402

3319

logger.warning(

2403

"disabling client {0} - Client never "

2404

"performed a successful checker"

2405

.format(client_name))

3320

"disabling client {} - Client never "

3321

"performed a successful checker".format(

3322

client_name))

2406

3323

client["enabled"] = False

2407

3324

elif client["last_checker_status"] != 0:

2408

3325

logger.warning(

2409

"disabling client {0} - Client "

2410

"last checker failed with error code {1}"

2411

.format(client_name,

2412

client["last_checker_status"]))

3326

"disabling client {} - Client last"

3327

" checker failed with error code"

3328

" {}".format(

3329

client_name,

3330

client["last_checker_status"]))

2413

3331

client["enabled"] = False

2414

3332

else:

2415

client["expires"] = (datetime.datetime

2416

.utcnow()

2417

+ client["timeout"])

3333

client["expires"] = (

3334

datetime.datetime.utcnow()

3335

+ client["timeout"])

2418

3336

logger.debug("Last checker succeeded,"

2419

" keeping {0} enabled"

2420

.format(client_name))

3337

" keeping {} enabled".format(

3338

client_name))

2421

3339

try:

2422

client["secret"] = (

2423

pgp.decrypt(client["encrypted_secret"],

2424

client_settings[client_name]

2425

["secret"]))

3340

client["secret"] = pgp.decrypt(

3341

client["encrypted_secret"],

3342

client_settings[client_name]["secret"])

2426

3343

except PGPError:

2427

3344

# If decryption fails, we use secret from new settings

2428

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

2429

.format(client_name))

2430

client["secret"] = (

2431

client_settings[client_name]["secret"])

2432

3345

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

3346

client_name))

3347

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

3348

["secret"])

3349

2433

3350

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

2434

3351

for client_name in (set(old_client_settings)

2435

3352

- set(client_settings)):

2437

3354

for client_name in (set(client_settings)

2438

3355

- set(old_client_settings)):

2439

3356

clients_data[client_name] = client_settings[client_name]

2440

3357

2441

3358

# Create all client objects

2442

for client_name, client in clients_data.iteritems():

3359

for client_name, client in clients_data.items():

2443

3360

tcp_server.clients[client_name] = client_class(

2444

name = client_name, settings = client)

2445

3361

name=client_name,

3362

settings=client,

3363

server_settings=server_settings)

3364

2446

3365

if not tcp_server.clients:

2447

3366

logger.warning("No clients defined")

2448

2449

if not debug:

2450

try:

2451

with pidfile:

2452

pid = os.getpid()

2453

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

2454

del pidfile

2455

except IOError:

2456

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

2457

pidfilename, pid)

2458

except NameError:

2459

# "pidfile" was never created

2460

pass

3367

3368

if not foreground:

3369

if pidfile is not None:

3370

pid = os.getpid()

3371

try:

3372

with pidfile:

3373

print(pid, file=pidfile)

3374

except IOError:

3375

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

3376

pidfilename, pid)

3377

del pidfile

2461

3378

del pidfilename

2462

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

2463

2464

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

2465

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

2466

3379

3380

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

3381

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3382

lambda: main_loop.quit() and False)

3383

2467

3384

if use_dbus:

2468

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

2469

"se.bsnet.fukt.Mandos"})

2470

class MandosDBusService(DBusObjectWithProperties):

3385

3386

@alternate_dbus_interfaces(

3387

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

3388

class MandosDBusService(DBusObjectWithObjectManager):

2471

3389

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

3390

2472

3391

def __init__(self):

2473

3392

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

3393

2474

3394

_interface = "se.recompile.Mandos"

2475

2476

@dbus_interface_annotations(_interface)

2477

def _foo(self):

2478

return { "org.freedesktop.DBus.Property"

2479

".EmitsChangedSignal":

2480

"false"}

2481

3395

2482

3396

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

2483

3397

def ClientAdded(self, objpath):

2484

3398

"D-Bus signal"

2485

3399

pass

2486

3400

2487

3401

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

2488

def ClientNotFound(self, fingerprint, address):

3402

def ClientNotFound(self, key_id, address):

2489

3403

"D-Bus signal"

2490

3404

pass

2491

3405

3406

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

3407

"true"})

2492

3408

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

2493

3409

def ClientRemoved(self, objpath, name):

2494

3410

"D-Bus signal"

2495

3411

pass

2496

3412

3413

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

3414

"true"})

2497

3415

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

2498

3416

def GetAllClients(self):

2499

3417

"D-Bus method"

2500

return dbus.Array(c.dbus_object_path

2501

for c in

2502

tcp_server.clients.itervalues())

2503

3418

return dbus.Array(c.dbus_object_path for c in

3419

tcp_server.clients.values())

3420

3421

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

3422

"true"})

2504

3423

@dbus.service.method(_interface,

2505

3424

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

2506

3425

def GetAllClientsWithProperties(self):

2507

3426

"D-Bus method"

2508

3427

return dbus.Dictionary(

2509

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

2510

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

3428

{c.dbus_object_path: c.GetAll(

3429

"se.recompile.Mandos.Client")

3430

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

2511

3431

signature="oa{sv}")

2512

3432

2513

3433

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

2514

3434

def RemoveClient(self, object_path):

2515

3435

"D-Bus method"

2516

for c in tcp_server.clients.itervalues():

3436

for c in tcp_server.clients.values():

2517

3437

if c.dbus_object_path == object_path:

2518

3438

del tcp_server.clients[c.name]

2519

3439

c.remove_from_connection()

2520

# Don't signal anything except ClientRemoved

3440

# Don't signal the disabling

2521

3441

c.disable(quiet=True)

2522

# Emit D-Bus signal

2523

self.ClientRemoved(object_path, c.name)

3442

# Emit D-Bus signal for removal

3443

self.client_removed_signal(c)

2524

3444

return

2525

3445

raise KeyError(object_path)

2526

3446

2527

3447

del _interface

2528

3448

3449

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3450

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

3451

def GetManagedObjects(self):

3452

"""D-Bus method"""

3453

return dbus.Dictionary(

3454

{client.dbus_object_path:

3455

dbus.Dictionary(

3456

{interface: client.GetAll(interface)

3457

for interface in

3458

client._get_all_interface_names()})

3459

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

3460

3461

def client_added_signal(self, client):

3462

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

3463

if use_dbus:

3464

# New standard signal

3465

self.InterfacesAdded(

3466

client.dbus_object_path,

3467

dbus.Dictionary(

3468

{interface: client.GetAll(interface)

3469

for interface in

3470

client._get_all_interface_names()}))

3471

# Old signal

3472

self.ClientAdded(client.dbus_object_path)

3473

3474

def client_removed_signal(self, client):

3475

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

3476

if use_dbus:

3477

# New standard signal

3478

self.InterfacesRemoved(

3479

client.dbus_object_path,

3480

client._get_all_interface_names())

3481

# Old signal

3482

self.ClientRemoved(client.dbus_object_path,

3483

client.name)

3484

2529

3485

mandos_dbus_service = MandosDBusService()

2530

3486

3487

# Save modules to variables to exempt the modules from being

3488

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

3489

mp = multiprocessing

3490

wn = wnull

3491

2531

3492

def cleanup():

2532

3493

"Cleanup function; run on exit"

2533

service.cleanup()

2534

2535

multiprocessing.active_children()

3494

if zeroconf:

3495

service.cleanup()

3496

3497

mp.active_children()

3498

wn.close()

2536

3499

if not (tcp_server.clients or client_settings):

2537

3500

return

2538

3501

2539

3502

# Store client before exiting. Secrets are encrypted with key

2540

3503

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

2541

3504

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

2542

3505

clients = {}

2543

3506

with PGPEngine() as pgp:

2544

for client in tcp_server.clients.itervalues():

3507

for client in tcp_server.clients.values():

2545

3508

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

2546

3509

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

2547

3510

key)

2548

3511

client_dict = {}

2549

3512

2550

3513

# A list of attributes that can not be pickled

2551

3514

# + secret.

2552

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

2553

"checker"))

2554

for name, typ in (inspect.getmembers

2555

(dbus.service.Object)):

3515

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

3516

"checker", "server_settings"}

3517

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

3518

.Object):

2556

3519

exclude.add(name)

2557

3520

2558

3521

client_dict["encrypted_secret"] = (client

2559

3522

.encrypted_secret)

2560

3523

for attr in client.client_structure:

2561

3524

if attr not in exclude:

2562

3525

client_dict[attr] = getattr(client, attr)

2563

3526

2564

3527

clients[client.name] = client_dict

2565

3528

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

2566

3529

2567

3530

try:

2568

with (tempfile.NamedTemporaryFile

2569

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

2570

dir=os.path.dirname(stored_state_path),

2571

delete=False)) as stored_state:

2572

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

2573

tempname=stored_state.name

3531

with tempfile.NamedTemporaryFile(

3532

mode='wb',

3533

suffix=".pickle",

3534

prefix='clients-',

3535

dir=os.path.dirname(stored_state_path),

3536

delete=False) as stored_state:

3537

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

3538

protocol=2)

3539

tempname = stored_state.name

2574

3540

os.rename(tempname, stored_state_path)

2575

3541

except (IOError, OSError) as e:

2576

3542

if not debug:

2579

3545

except NameError:

2580

3546

pass

2581

3547

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

2582

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

3548

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

2583

3549

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

2584

3550

else:

2585

3551

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

2586

3552

exc_info=e)

2587

raise e

2588

3553

raise

3554

2589

3555

# Delete all clients, and settings from config

2590

3556

while tcp_server.clients:

2591

3557

name, client = tcp_server.clients.popitem()

2592

3558

if use_dbus:

2593

3559

client.remove_from_connection()

2594

# Don't signal anything except ClientRemoved

3560

# Don't signal the disabling

2595

3561

client.disable(quiet=True)

3562

# Emit D-Bus signal for removal

2596

3563

if use_dbus:

2597

# Emit D-Bus signal

2598

mandos_dbus_service.ClientRemoved(client

2599

.dbus_object_path,

2600

client.name)

3564

mandos_dbus_service.client_removed_signal(client)

2601

3565

client_settings.clear()

2602

3566

2603

3567

atexit.register(cleanup)

2604

2605

for client in tcp_server.clients.itervalues():

3568

3569

for client in tcp_server.clients.values():

2606

3570

if use_dbus:

2607

# Emit D-Bus signal

2608

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3571

# Emit D-Bus signal for adding

3572

mandos_dbus_service.client_added_signal(client)

2609

3573

# Need to initiate checking of clients

2610

3574

if client.enabled:

2611

3575

client.init_checker()

2612

3576

2613

3577

tcp_server.enable()

2614

3578

tcp_server.server_activate()

2615

3579

2616

3580

# Find out what port we got

2617

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

3581

if zeroconf:

3582

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

2618

3583

if use_ipv6:

2619

3584

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

2620

3585

" flowinfo %d, scope_id %d",

2622

3587

else: # IPv4

2623

3588

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

2624

3589

*tcp_server.socket.getsockname())

2625

2626

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

2627

3590

3591

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

3592

2628

3593

try:

2629

# From the Avahi example code

2630

try:

2631

service.activate()

2632

except dbus.exceptions.DBusException as error:

2633

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

2634

cleanup()

2635

sys.exit(1)

2636

# End of Avahi example code

2637

2638

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

2639

lambda *args, **kwargs:

2640

(tcp_server.handle_request

2641

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

2642

3594

if zeroconf:

3595

# From the Avahi example code

3596

try:

3597

service.activate()

3598

except dbus.exceptions.DBusException as error:

3599

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

3600

cleanup()

3601

sys.exit(1)

3602

# End of Avahi example code

3603

3604

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

3605

lambda *args, **kwargs:

3606

(tcp_server.handle_request

3607

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

3608

2643

3609

logger.debug("Starting main loop")

2644

3610

main_loop.run()

2645

3611

except AvahiError as error:

2654

3620

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

2655

3621

cleanup()

2656

3622

3623

2657

3624

if __name__ == '__main__':

2658

3625

main()