/mandos/release : revision 237.7.281

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

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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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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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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 ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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version = "1.6.8"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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"""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 = (logging.handlers.SysLogHandler

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(facility =

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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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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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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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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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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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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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

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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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self.interface = interface

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self.name = name

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self.type = servicetype

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = str(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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if remove:

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self.remove()

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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str(error))

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

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

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.format(error))

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def cleanup(self):

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

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

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

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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

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def rename(self):

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

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

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syslogger.setFormatter(logging.Formatter(

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

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.format(self.name)))

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def call_pipe(connection, # : multiprocessing.Connection

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func, *args, **kwargs):

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

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

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return value on the provided multiprocessing.Connection.

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"""

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

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connection.close()

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404

class Client(object):

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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last_checker_signal: The signal which killed the last checker, if

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last_checker_status is -1

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

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

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D-Bus identifiers

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

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"last_approval_request", "last_checked_ok",

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

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client_defaults = {

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"timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def config_parser(config):

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

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"enabled")

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the

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# fingerprint() function

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

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.replace(" ", ""))

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486

if "secret" in section:

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self.expires = None

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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

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datetime.datetime.utcnow())

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self.current_checker_command = None

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self.approved = None

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self.approvals_pending = 0

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

546

self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

548

.Lock()))

549

self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

586

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if not attr.startswith("_")]

587

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self.client_structure.append("client_structure")

588

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589

for name, t in inspect.getmembers(

590

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

554

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

555

lambda obj:

556

isinstance(obj,

557

property)):

591

558

if not name.startswith("_"):

592

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self.client_structure.append(name)

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560

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602

# and every interval from then on.

636

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if self.checker_initiator_tag is not None:

637

604

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

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

640

self.start_checker)

605

self.checker_initiator_tag = (gobject.timeout_add

606

(int(self.interval

607

.total_seconds() * 1000),

608

self.start_checker))

641

609

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

642

610

if self.disable_initiator_tag is not None:

643

611

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

612

self.disable_initiator_tag = (gobject.timeout_add

613

(int(self.timeout

614

.total_seconds() * 1000),

615

self.disable))

646

616

# Also start a new checker *right now*.

647

617

self.start_checker()

648

618

649

def checker_callback(self, source, condition, connection,

650

command):

619

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

651

620

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

652

621

self.checker_callback_tag = None

653

622

self.checker = None

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

623

if os.WIFEXITED(condition):

624

self.last_checker_status = os.WEXITSTATUS(condition)

661

625

if self.last_checker_status == 0:

662

626

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

663

627

vars(self))

664

628

self.checked_ok()

665

629

else:

666

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

630

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

631

vars(self))

667

632

else:

668

633

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

670

634

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

671

635

vars(self))

672

return False

673

636

674

637

def checked_ok(self):

675

638

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

676

639

self.last_checked_ok = datetime.datetime.utcnow()

677

640

self.last_checker_status = 0

678

self.last_checker_signal = None

679

641

self.bump_timeout()

680

642

681

643

def bump_timeout(self, timeout=None):

686

648

gobject.source_remove(self.disable_initiator_tag)

687

649

self.disable_initiator_tag = None

688

650

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

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

651

self.disable_initiator_tag = (gobject.timeout_add

652

(int(timeout.total_seconds()

653

* 1000), self.disable))

691

654

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

692

655

693

656

def need_approval(self):

707

670

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

708

671

# should be.

709

672

710

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

711

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

712

self.checker.join()

713

self.checker = None

673

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

674

try:

675

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

676

except AttributeError:

677

pass

678

except OSError as error:

679

if error.errno != errno.ECHILD:

680

raise

681

else:

682

if pid:

683

logger.warning("Checker was a zombie")

684

gobject.source_remove(self.checker_callback_tag)

685

self.checker_callback(pid, status,

686

self.current_checker_command)

714

687

# Start a new checker if needed

715

688

if self.checker is None:

716

689

# Escape attributes for the shell

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

690

escaped_attrs = { attr:

691

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

692

for attr in self.runtime_expansions }

720

693

try:

721

694

command = self.checker_command % escaped_attrs

722

695

except TypeError as error:

723

696

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

724

self.checker_command,

697

self.checker_command, exc_info=error)

698

return True # Try again later

699

self.current_checker_command = command

700

try:

701

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

702

command, self.name)

703

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

704

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

705

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

706

# always replaced by /dev/null.)

707

# The exception is when not debugging but nevertheless

708

# running in the foreground; use the previously

709

# created wnull.

710

popen_args = {}

711

if (not self.server_settings["debug"]

712

and self.server_settings["foreground"]):

713

popen_args.update({"stdout": wnull,

714

"stderr": wnull })

715

self.checker = subprocess.Popen(command,

716

close_fds=True,

717

shell=True, cwd="/",

718

**popen_args)

719

except OSError as error:

720

logger.error("Failed to start subprocess",

725

721

exc_info=error)

726

return True # Try again later

727

self.current_checker_command = command

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

self.checker_callback, pipe[0], command)

722

return True

723

self.checker_callback_tag = (gobject.child_watch_add

724

(self.checker.pid,

725

self.checker_callback,

726

data=command))

727

# The checker may have completed before the gobject

728

# watch was added. Check for this.

729

try:

730

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

731

except OSError as error:

732

if error.errno == errno.ECHILD:

733

# This should never happen

734

logger.error("Child process vanished",

735

exc_info=error)

736

return True

737

raise

738

if pid:

739

gobject.source_remove(self.checker_callback_tag)

740

self.checker_callback(pid, status, command)

753

741

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

754

742

return True

755

743

761

749

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

762

750

return

763

751

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

764

self.checker.terminate()

752

try:

753

self.checker.terminate()

754

#time.sleep(0.5)

755

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

756

# self.checker.kill()

757

except OSError as error:

758

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

759

raise

765

760

self.checker = None

766

761

767

762

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

763

def dbus_service_property(dbus_interface, signature="v",

764

access="readwrite", byte_arrays=False):

772

765

"""Decorators for marking methods of a DBusObjectWithProperties to

773

766

become properties on the D-Bus.

774

767

784

777

if byte_arrays and signature != "ay":

785

778

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

786

779

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

787

788

780

def decorator(func):

789

781

func._dbus_is_property = True

790

782

func._dbus_interface = dbus_interface

795

787

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

796

788

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

797

789

return func

798

799

790

return decorator

800

791

801

792

810

801

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

811

802

"false"}

812

803

"""

813

814

804

def decorator(func):

815

805

func._dbus_is_interface = True

816

806

func._dbus_interface = dbus_interface

817

807

func._dbus_name = dbus_interface

818

808

return func

819

820

809

return decorator

821

810

822

811

832

821

def Property_dbus_property(self):

833

822

return dbus.Boolean(False)

834

823

"""

835

836

824

def decorator(func):

837

825

func._dbus_annotations = annotations

838

826

return func

839

840

827

return decorator

841

828

842

829

845

832

"""

846

833

pass

847

834

848

849

835

class DBusPropertyAccessException(DBusPropertyException):

850

836

"""A property's access permissions disallows an operation.

851

837

"""

879

865

def _get_all_dbus_things(self, thing):

880

866

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

881

867

"""

882

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

868

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

869

name),

883

870

athing.__get__(self))

884

871

for cls in self.__class__.__mro__

885

872

for name, athing in

886

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

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

887

875

888

876

def _get_dbus_property(self, interface_name, property_name):

889

877

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

890

878

property with the specified name and interface.

891

879

"""

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

880

for cls in self.__class__.__mro__:

881

for name, value in (inspect.getmembers

882

(cls,

883

self._is_dbus_thing("property"))):

895

884

if (value._dbus_name == property_name

896

885

and value._dbus_interface == interface_name):

897

886

return value.__get__(self)

898

887

899

888

# No such property

900

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

901

self.dbus_object_path, interface_name, property_name))

889

raise DBusPropertyNotFound(self.dbus_object_path + ":"

890

+ interface_name + "."

891

+ property_name)

902

892

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

893

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

905

894

out_signature="v")

906

895

def Get(self, interface_name, property_name):

907

896

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

932

921

for byte in value))

933

922

prop(value)

934

923

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

924

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

937

925

out_signature="a{sv}")

938

926

def GetAll(self, interface_name):

939

927

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

954

942

if not hasattr(value, "variant_level"):

955

943

properties[name] = value

956

944

continue

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

945

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

946

value.variant_level+1)

959

947

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

960

948

961

949

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

979

967

connection)

980

968

try:

981

969

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

982

983

970

def make_tag(document, name, prop):

984

971

e = document.createElement("property")

985

972

e.setAttribute("name", name)

986

973

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

987

974

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

988

975

return e

989

990

976

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

991

977

# Add property tags

992

978

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

1004

990

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

1005

991

and prop._dbus_interface

1006

992

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

993

annots.update(getattr

994

(prop,

995

"_dbus_annotations",

996

{}))

1009

997

for name, value in annots.items():

1010

998

ann_tag = document.createElement(

1011

999

"annotation")

1016

1004

for annotation, value in dict(

1017

1005

itertools.chain.from_iterable(

1018

1006

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1007

for name, annotations in

1008

self._get_all_dbus_things("interface")

1021

1009

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

1022

1010

)).items():

1023

1011

ann_tag = document.createElement("annotation")

1052

1040

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

1053

1041

if dt is None:

1054

1042

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

1055

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

1043

return dbus.String(dt.isoformat(),

1044

variant_level=variant_level)

1056

1045

1057

1046

1058

1047

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1078

1067

(from DBusObjectWithProperties) and interfaces (from the

1079

1068

dbus_interface_annotations decorator).

1080

1069

"""

1081

1082

1070

def wrapper(cls):

1083

1071

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1072

alt_interface_names.items()):

1085

1073

attr = {}

1086

1074

interface_names = set()

1087

1075

# Go though all attributes of the class

1089

1077

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

1090

1078

# with the wrong interface name

1091

1079

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1080

or not attribute._dbus_interface

1081

.startswith(orig_interface_name)):

1094

1082

continue

1095

1083

# Create an alternate D-Bus interface name based on

1096

1084

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1085

alt_interface = (attribute._dbus_interface

1086

.replace(orig_interface_name,

1087

alt_interface_name))

1099

1088

interface_names.add(alt_interface)

1100

1089

# Is this a D-Bus signal?

1101

1090

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

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1091

# Extract the original non-method undecorated

1092

# function by black magic

1093

nonmethod_func = (dict(

1106

1094

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1095

attribute.__closure__))["func"]

1096

.cell_contents)

1111

1097

# Create a new, but exactly alike, function

1112

1098

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

1113

1099

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1100

new_function = (dbus.service.signal

1101

(alt_interface,

1102

attribute._dbus_signature)

1103

(types.FunctionType(

1104

nonmethod_func.func_code,

1105

nonmethod_func.func_globals,

1106

nonmethod_func.func_name,

1107

nonmethod_func.func_defaults,

1108

nonmethod_func.func_closure)))

1131

1109

# Copy annotations, if any

1132

1110

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1111

new_function._dbus_annotations = (

1112

dict(attribute._dbus_annotations))

1135

1113

except AttributeError:

1136

1114

pass

1137

1115

# Define a creator of a function to call both the

1142

1120

"""This function is a scope container to pass

1143

1121

func1 and func2 to the "call_both" function

1144

1122

outside of its arguments"""

1145

1146

1123

def call_both(*args, **kwargs):

1147

1124

"""This function will emit two D-Bus

1148

1125

signals by calling func1 and func2"""

1149

1126

func1(*args, **kwargs)

1150

1127

func2(*args, **kwargs)

1151

1152

1128

return call_both

1153

1129

# Create the "call_both" function and add it to

1154

1130

# the class

1159

1135

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

1160

1136

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

1161

1137

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1138

attr[attrname] = (dbus.service.method

1139

(alt_interface,

1140

attribute._dbus_in_signature,

1141

attribute._dbus_out_signature)

1142

(types.FunctionType

1143

(attribute.func_code,

1144

attribute.func_globals,

1145

attribute.func_name,

1146

attribute.func_defaults,

1147

attribute.func_closure)))

1172

1148

# Copy annotations, if any

1173

1149

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1150

attr[attrname]._dbus_annotations = (

1151

dict(attribute._dbus_annotations))

1176

1152

except AttributeError:

1177

1153

pass

1178

1154

# Is this a D-Bus property?

1181

1157

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

1182

1158

# property with the alternate D-Bus interface

1183

1159

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1160

attr[attrname] = (dbus_service_property

1161

(alt_interface,

1162

attribute._dbus_signature,

1163

attribute._dbus_access,

1164

attribute

1165

._dbus_get_args_options

1166

["byte_arrays"])

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1195

1173

# Copy annotations, if any

1196

1174

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1175

attr[attrname]._dbus_annotations = (

1176

dict(attribute._dbus_annotations))

1199

1177

except AttributeError:

1200

1178

pass

1201

1179

# Is this a D-Bus interface?

1204

1182

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

1205

1183

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

1206

1184

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1185

attr[attrname] = (dbus_interface_annotations

1186

(alt_interface)

1187

(types.FunctionType

1188

(attribute.func_code,

1189

attribute.func_globals,

1190

attribute.func_name,

1191

attribute.func_defaults,

1192

attribute.func_closure)))

1214

1193

if deprecate:

1215

1194

# Deprecate all alternate interfaces

1216

1195

iname="_AlternateDBusNames_interface_annotation{}"

1217

1196

for interface_name in interface_names:

1218

1219

1197

@dbus_interface_annotations(interface_name)

1220

1198

def func(self):

1221

1199

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

1222

"true" }

1200

"true" }

1223

1201

# Find an unused name

1224

1202

for aname in (iname.format(i)

1225

1203

for i in itertools.count()):

1230

1208

# Replace the class with a new subclass of it with

1231

1209

# methods, signals, etc. as created above.

1232

1210

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

1233

(cls, ), attr)

1211

(cls,), attr)

1234

1212

return cls

1235

1236

1213

return wrapper

1237

1214

1238

1215

1239

1216

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

1240

"se.bsnet.fukt.Mandos"})

1217

"se.bsnet.fukt.Mandos"})

1241

1218

class ClientDBus(Client, DBusObjectWithProperties):

1242

1219

"""A Client class using D-Bus

1243

1220

1247

1224

"""

1248

1225

1249

1226

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1227

+ ("dbus_object_path",))

1251

1228

1252

1229

_interface = "se.recompile.Mandos.Client"

1253

1230

1261

1238

client_object_name = str(self.name).translate(

1262

1239

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

1263

1240

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

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1241

self.dbus_object_path = (dbus.ObjectPath

1242

("/clients/" + client_object_name))

1266

1243

DBusObjectWithProperties.__init__(self, self.bus,

1267

1244

self.dbus_object_path)

1268

1245

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1246

def notifychangeproperty(transform_func,

1247

dbus_name, type_func=lambda x: x,

1248

variant_level=1, invalidate_only=False,

1273

1249

_interface=_interface):

1274

1250

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

1275

1251

its changes to DBus.

1282

1258

variant_level: D-Bus variant level. Default: 1

1283

1259

"""

1284

1260

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

1285

1286

1261

def setter(self, value):

1287

1262

if hasattr(self, "dbus_object_path"):

1288

1263

if (not hasattr(self, attrname) or

1289

1264

type_func(getattr(self, attrname, None))

1290

1265

!= type_func(value)):

1291

1266

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1267

self.PropertiesChanged(_interface,

1268

dbus.Dictionary(),

1269

dbus.Array

1270

((dbus_name,)))

1295

1271

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1299

1275

self.PropertyChanged(dbus.String(dbus_name),

1300

1276

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1277

self.PropertiesChanged(_interface,

1278

dbus.Dictionary({

1279

dbus.String(dbus_name):

1280

dbus_value }), dbus.Array())

1306

1281

setattr(self, attrname, value)

1307

1282

1308

1283

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

1314

1289

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

1315

1290

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

1291

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1292

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

1293

type_func = lambda checker:

1294

checker is not None)

1320

1295

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

1296

"LastCheckedOK")

1322

1297

last_checker_status = notifychangeproperty(dbus.Int16,

1325

1300

datetime_to_dbus, "LastApprovalRequest")

1326

1301

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

1302

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1303

approval_delay = notifychangeproperty(dbus.UInt64,

1304

"ApprovalDelay",

1305

type_func =

1306

lambda td: td.total_seconds()

1307

* 1000)

1331

1308

approval_duration = notifychangeproperty(

1332

1309

dbus.UInt64, "ApprovalDuration",

1333

1310

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

1334

1311

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

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1312

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

1313

type_func = lambda td:

1314

td.total_seconds() * 1000)

1338

1315

extended_timeout = notifychangeproperty(

1339

1316

dbus.UInt64, "ExtendedTimeout",

1340

1317

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

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

lambda td: td.total_seconds()

1322

* 1000)

1344

1323

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

1345

1324

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

1346

1325

invalidate_only=True)

1356

1335

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

1357

1336

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

1358

1337

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

1338

def checker_callback(self, pid, condition, command,

1339

*args, **kwargs):

1340

self.checker_callback_tag = None

1341

self.checker = None

1342

if os.WIFEXITED(condition):

1343

exitstatus = os.WEXITSTATUS(condition)

1366

1344

# Emit D-Bus signal

1367

1345

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

1346

dbus.Int64(condition),

1369

1347

dbus.String(command))

1370

1348

else:

1371

1349

# Emit D-Bus signal

1372

1350

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

1373

dbus.Int64(

1374

self.last_checker_signal),

1351

dbus.Int64(condition),

1375

1352

dbus.String(command))

1376

return ret

1353

1354

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

1355

*args, **kwargs)

1377

1356

1378

1357

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

1379

1358

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

1484

1463

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

1485

1464

1486

1465

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

1466

@dbus_service_property(_interface, signature="b",

1489

1467

access="readwrite")

1490

1468

def ApprovedByDefault_dbus_property(self, value=None):

1491

1469

if value is None: # get

1493

1471

self.approved_by_default = bool(value)

1494

1472

1495

1473

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

1474

@dbus_service_property(_interface, signature="t",

1498

1475

access="readwrite")

1499

1476

def ApprovalDelay_dbus_property(self, value=None):

1500

1477

if value is None: # get

1503

1480

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

1504

1481

1505

1482

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

1483

@dbus_service_property(_interface, signature="t",

1508

1484

access="readwrite")

1509

1485

def ApprovalDuration_dbus_property(self, value=None):

1510

1486

if value is None: # get

1523

1499

return dbus.String(self.fingerprint)

1524

1500

1525

1501

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1502

@dbus_service_property(_interface, signature="s",

1528

1503

access="readwrite")

1529

1504

def Host_dbus_property(self, value=None):

1530

1505

if value is None: # get

1542

1517

return datetime_to_dbus(self.last_enabled)

1543

1518

1544

1519

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1520

@dbus_service_property(_interface, signature="b",

1547

1521

access="readwrite")

1548

1522

def Enabled_dbus_property(self, value=None):

1549

1523

if value is None: # get

1554

1528

self.disable()

1555

1529

1556

1530

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1531

@dbus_service_property(_interface, signature="s",

1559

1532

access="readwrite")

1560

1533

def LastCheckedOK_dbus_property(self, value=None):

1561

1534

if value is not None:

1564

1537

return datetime_to_dbus(self.last_checked_ok)

1565

1538

1566

1539

# LastCheckerStatus - property

1567

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

1540

@dbus_service_property(_interface, signature="n",

1541

access="read")

1568

1542

def LastCheckerStatus_dbus_property(self):

1569

1543

return dbus.Int16(self.last_checker_status)

1570

1544

1579

1553

return datetime_to_dbus(self.last_approval_request)

1580

1554

1581

1555

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1556

@dbus_service_property(_interface, signature="t",

1584

1557

access="readwrite")

1585

1558

def Timeout_dbus_property(self, value=None):

1586

1559

if value is None: # get

1599

1572

is None):

1600

1573

return

1601

1574

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1575

self.disable_initiator_tag = (

1576

gobject.timeout_add(

1577

int((self.expires - now).total_seconds()

1578

* 1000), self.disable))

1605

1579

1606

1580

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1581

@dbus_service_property(_interface, signature="t",

1609

1582

access="readwrite")

1610

1583

def ExtendedTimeout_dbus_property(self, value=None):

1611

1584

if value is None: # get

1614

1587

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

1615

1588

1616

1589

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1590

@dbus_service_property(_interface, signature="t",

1619

1591

access="readwrite")

1620

1592

def Interval_dbus_property(self, value=None):

1621

1593

if value is None: # get

1626

1598

if self.enabled:

1627

1599

# Reschedule checker run

1628

1600

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1601

self.checker_initiator_tag = (gobject.timeout_add

1602

(value, self.start_checker))

1603

self.start_checker() # Start one now, too

1632

1604

1633

1605

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1606

@dbus_service_property(_interface, signature="s",

1636

1607

access="readwrite")

1637

1608

def Checker_dbus_property(self, value=None):

1638

1609

if value is None: # get

1640

1611

self.checker_command = str(value)

1641

1612

1642

1613

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1614

@dbus_service_property(_interface, signature="b",

1645

1615

access="readwrite")

1646

1616

def CheckerRunning_dbus_property(self, value=None):

1647

1617

if value is None: # get

1657

1627

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1628

1659

1629

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1630

@dbus_service_property(_interface, signature="ay",

1631

access="write", byte_arrays=True)

1664

1632

def Secret_dbus_property(self, value):

1665

1633

self.secret = bytes(value)

1666

1634

1672

1640

self._pipe = child_pipe

1673

1641

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

1674

1642

if not self._pipe.recv():

1675

raise KeyError(fpr)

1643

raise KeyError()

1676

1644

1677

1645

def __getattribute__(self, name):

1678

1646

if name == '_pipe':

1682

1650

if data[0] == 'data':

1683

1651

return data[1]

1684

1652

if data[0] == 'function':

1685

1686

1653

def func(*args, **kwargs):

1687

1654

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

1688

1655

return self._pipe.recv()[1]

1689

1690

1656

return func

1691

1657

1692

1658

def __setattr__(self, name, value):

1708

1674

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

1709

1675

self.server.child_pipe.fileno())

1710

1676

1711

session = gnutls.connection.ClientSession(

1712

self.request, gnutls.connection .X509Credentials())

1677

session = (gnutls.connection

1678

.ClientSession(self.request,

1679

gnutls.connection

1680

.X509Credentials()))

1713

1681

1714

1682

# Note: gnutls.connection.X509Credentials is really a

1715

1683

# generic GnuTLS certificate credentials object so long as

1724

1692

priority = self.server.gnutls_priority

1725

1693

if priority is None:

1726

1694

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1695

(gnutls.library.functions

1696

.gnutls_priority_set_direct(session._c_object,

1697

priority, None))

1729

1698

1730

1699

# Start communication using the Mandos protocol

1731

1700

# Get protocol number

1751

1720

approval_required = False

1752

1721

try:

1753

1722

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1723

fpr = self.fingerprint(self.peer_certificate

1724

(session))

1756

1725

except (TypeError,

1757

1726

gnutls.errors.GNUTLSError) as error:

1758

1727

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

1773

1742

while True:

1774

1743

if not client.enabled:

1775

1744

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

1776

client.name)

1745

client.name)

1777

1746

if self.server.use_dbus:

1778

1747

# Emit D-Bus signal

1779

1748

client.Rejected("Disabled")

1826

1795

logger.warning("gnutls send failed",

1827

1796

exc_info=error)

1828

1797

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1798

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

1799

sent, len(client.secret)

1800

- (sent_size + sent))

1832

1801

sent_size += sent

1833

1802

1834

1803

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

1851

1820

def peer_certificate(session):

1852

1821

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

1853

1822

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1823

if (gnutls.library.functions

1824

.gnutls_certificate_type_get(session._c_object)

1856

1825

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1826

# ...do the normal thing

1858

1827

return session.peer_certificate

1872

1841

def fingerprint(openpgp):

1873

1842

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1843

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1844

datum = (gnutls.library.types

1845

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

1846

ctypes.POINTER

1847

(ctypes.c_ubyte)),

1848

ctypes.c_uint(len(openpgp))))

1879

1849

# New empty GnuTLS certificate

1880

1850

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1851

(gnutls.library.functions

1852

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1853

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1854

(gnutls.library.functions

1855

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

1856

gnutls.library.constants

1857

.GNUTLS_OPENPGP_FMT_RAW))

1887

1858

# Verify the self signature in the key

1888

1859

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1860

(gnutls.library.functions

1861

.gnutls_openpgp_crt_verify_self(crt, 0,

1862

ctypes.byref(crtverify)))

1891

1863

if crtverify.value != 0:

1892

1864

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1865

raise (gnutls.errors.CertificateSecurityError

1866

("Verify failed"))

1895

1867

# New buffer for the fingerprint

1896

1868

buf = ctypes.create_string_buffer(20)

1897

1869

buf_len = ctypes.c_size_t()

1898

1870

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1871

(gnutls.library.functions

1872

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

1873

ctypes.byref(buf_len)))

1901

1874

# Deinit the certificate

1902

1875

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1876

# Convert the buffer to a Python bytestring

1909

1882

1910

1883

class MultiprocessingMixIn(object):

1911

1884

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

1912

1913

1885

def sub_process_main(self, request, address):

1914

1886

try:

1915

1887

self.finish_request(request, address)

1927

1899

1928

1900

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1901

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

1930

1931

1902

def process_request(self, request, client_address):

1932

1903

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

1933

1904

1954

1925

interface: None or a network interface name (string)

1955

1926

use_ipv6: Boolean; to use IPv6 or not

1956

1927

"""

1957

1958

1928

def __init__(self, server_address, RequestHandlerClass,

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1929

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

1962

1930

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

1963

1931

creating a new one with socket.socket().

1964

1932

"""

2005

1973

self.interface)

2006

1974

else:

2007

1975

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1976

self.socket.setsockopt(socket.SOL_SOCKET,

1977

SO_BINDTODEVICE,

1978

(self.interface + "\0")

1979

.encode("utf-8"))

2011

1980

except socket.error as error:

2012

1981

if error.errno == errno.EPERM:

2013

1982

logger.error("No permission to bind to"

2031

2000

self.server_address = (any_address,

2032

2001

self.server_address[1])

2033

2002

elif not self.server_address[1]:

2034

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

2003

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

2004

0)

2035

2005

# if self.interface:

2036

2006

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

2037

2007

# 0, # port

2051

2021

2052

2022

Assumes a gobject.MainLoop event loop.

2053

2023

"""

2054

2055

2024

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

2025

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

2026

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

2062

2027

self.enabled = False

2063

2028

self.clients = clients

2064

2029

if self.clients is None:

2070

2035

interface = interface,

2071

2036

use_ipv6 = use_ipv6,

2072

2037

socketfd = socketfd)

2073

2074

2038

def server_activate(self):

2075

2039

if self.enabled:

2076

2040

return socketserver.TCPServer.server_activate(self)

2080

2044

2081

2045

def add_pipe(self, parent_pipe, proc):

2082

2046

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2047

gobject.io_add_watch(parent_pipe.fileno(),

2048

gobject.IO_IN | gobject.IO_HUP,

2049

functools.partial(self.handle_ipc,

2050

parent_pipe =

2051

parent_pipe,

2052

proc = proc))

2089

2053

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2054

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

2055

proc = None, client_object=None):

2094

2056

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

2095

2057

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

2096

2058

# Wait for other process to exit

2119

2081

parent_pipe.send(False)

2120

2082

return False

2121

2083

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

2084

gobject.io_add_watch(parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe =

2088

parent_pipe,

2089

proc = proc,

2090

client_object =

2091

client))

2129

2092

parent_pipe.send(True)

2130

2093

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

2131

2094

# same fileno

2137

2100

2138

2101

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

2139

2102

funcname)(*args,

2140

**kwargs)))

2103

**kwargs)))

2141

2104

2142

2105

if command == 'getattr':

2143

2106

attrname = request[1]

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

2107

if callable(client_object.__getattribute__(attrname)):

2108

parent_pipe.send(('function',))

2147

2109

else:

2148

parent_pipe.send((

2149

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

2110

parent_pipe.send(('data', client_object

2111

.__getattribute__(attrname)))

2150

2112

2151

2113

if command == 'setattr':

2152

2114

attrname = request[1]

2183

2145

# avoid excessive use of external libraries.

2184

2146

2185

2147

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2148

Token = collections.namedtuple("Token",

2149

("regexp", # To match token; if

2150

# "value" is not None,

2151

# must have a "group"

2152

# containing digits

2153

"value", # datetime.timedelta or

2154

# None

2155

"followers")) # Tokens valid after

2156

# this token

2191

2157

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

2192

2158

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

2193

2159

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

2194

2160

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

2195

2161

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2162

frozenset((token_end,)))

2197

2163

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

2198

2164

datetime.timedelta(minutes=1),

2199

2165

frozenset((token_second, token_end)))

2215

2181

frozenset((token_month, token_end)))

2216

2182

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

2217

2183

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2184

frozenset((token_end,)))

2219

2185

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

2220

2186

frozenset((token_year, token_month,

2221

2187

token_day, token_time,

2223

2189

# Define starting values

2224

2190

value = datetime.timedelta() # Value so far

2225

2191

found_token = None

2226

followers = frozenset((token_duration, )) # Following valid tokens

2192

followers = frozenset((token_duration,)) # Following valid tokens

2227

2193

s = duration # String left to parse

2228

2194

# Loop until end token is found

2229

2195

while found_token is not token_end:

2246

2212

break

2247

2213

else:

2248

2214

# No currently valid tokens were found

2249

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

2250

.format(duration))

2215

raise ValueError("Invalid RFC 3339 duration")

2251

2216

# End token found

2252

2217

return value

2253

2218

2290

2255

elif suffix == "w":

2291

2256

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

2292

2257

else:

2293

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

2258

raise ValueError("Unknown suffix {!r}"

2259

.format(suffix))

2294

2260

except IndexError as e:

2295

2261

raise ValueError(*(e.args))

2296

2262

timevalue += delta

2312

2278

# Close all standard open file descriptors

2313

2279

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

2314

2280

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

2315

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2281

raise OSError(errno.ENODEV, "{} not a character device"

2317

2282

.format(os.devnull))

2318

2283

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

2319

2284

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

2385

2350

"port": "",

2386

2351

"debug": "False",

2387

2352

"priority":

2388

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

2389

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2353

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

2390

2354

"servicename": "Mandos",

2391

2355

"use_dbus": "True",

2392

2356

"use_ipv6": "True",

2396

2360

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

2397

2361

"foreground": "False",

2398

2362

"zeroconf": "True",

2399

}

2363

}

2400

2364

2401

2365

# Parse config file for server-global settings

2402

2366

server_config = configparser.SafeConfigParser(server_defaults)

2403

2367

del server_defaults

2404

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

2368

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

2369

"mandos.conf"))

2405

2370

# Convert the SafeConfigParser object to a dict

2406

2371

server_settings = server_config.defaults()

2407

2372

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

2425

2390

# Override the settings from the config file with command line

2426

2391

# options, if set.

2427

2392

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

2428

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

2429

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

2430

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

2393

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

2394

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

2395

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

2431

2396

value = getattr(options, option)

2432

2397

if value is not None:

2433

2398

server_settings[option] = value

2448

2413

2449

2414

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

2450

2415

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

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

2454

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

2416

if (not server_settings["zeroconf"] and

2417

not (server_settings["port"]

2418

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

2419

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

2420

" Zeroconf")

2455

2421

2456

2422

# For convenience

2457

2423

debug = server_settings["debug"]

2473

2439

initlogger(debug, level)

2474

2440

2475

2441

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

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

2442

syslogger.setFormatter(logging.Formatter

2443

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

2444

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

2445

.format(server_settings

2446

["servicename"])))

2480

2447

2481

2448

# Parse config file with clients

2482

2449

client_config = configparser.SafeConfigParser(Client

2490

2457

socketfd = None

2491

2458

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

2492

2459

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

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

2495

ClientHandler,

2496

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

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2460

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

2461

server_settings["port"]),

2462

ClientHandler,

2463

interface=(server_settings["interface"]

2464

or None),

2465

use_ipv6=use_ipv6,

2466

gnutls_priority=

2467

server_settings["priority"],

2468

use_dbus=use_dbus,

2469

socketfd=socketfd)

2501

2470

if not foreground:

2502

2471

pidfilename = "/run/mandos.pid"

2503

2472

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

2504

2473

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

2505

2474

pidfile = None

2506

2475

try:

2507

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

2476

pidfile = open(pidfilename, "w")

2508

2477

except IOError as e:

2509

2478

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

2510

2479

exc_info=e)

2537

2506

def debug_gnutls(level, string):

2538

2507

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

2539

2508

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2509

(gnutls.library.functions

2510

.gnutls_global_set_log_function(debug_gnutls))

2542

2511

2543

2512

# Redirect stdin so all checkers get /dev/null

2544

2513

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

2564

2533

if use_dbus:

2565

2534

try:

2566

2535

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

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

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

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2536

bus, do_not_queue=True)

2537

old_bus_name = (dbus.service.BusName

2538

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

2539

do_not_queue=True))

2540

except dbus.exceptions.NameExistsException as e:

2573

2541

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

2574

2542

use_dbus = False

2575

2543

server_settings["use_dbus"] = False

2576

2544

tcp_server.use_dbus = False

2577

2545

if zeroconf:

2578

2546

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2547

service = AvahiServiceToSyslog(name =

2548

server_settings["servicename"],

2549

servicetype = "_mandos._tcp",

2550

protocol = protocol, bus = bus)

2584

2551

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

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

2552

service.interface = (if_nametoindex

2553

(server_settings["interface"]

2554

.encode("utf-8")))

2587

2555

2588

2556

global multiprocessing_manager

2589

2557

multiprocessing_manager = multiprocessing.Manager()

2608

2576

if server_settings["restore"]:

2609

2577

try:

2610

2578

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2579

clients_data, old_client_settings = (pickle.load

2580

(stored_state))

2613

2581

os.remove(stored_state_path)

2614

2582

except IOError as e:

2615

2583

if e.errno == errno.ENOENT:

2616

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

2617

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

2584

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

2585

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

2618

2586

else:

2619

2587

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

2620

2588

exc_info=e)

2621

2589

raise

2622

2590

except EOFError as e:

2623

2591

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

2624

"EOFError:",

2625

exc_info=e)

2592

"EOFError:", exc_info=e)

2626

2593

2627

2594

with PGPEngine() as pgp:

2628

2595

for client_name, client in clients_data.items():

2640

2607

# For each value in new config, check if it

2641

2608

# differs from the old config value (Except for

2642

2609

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2610

if (name != "secret" and

2611

value != old_client_settings[client_name]

2612

[name]):

2646

2613

client[name] = value

2647

2614

except KeyError:

2648

2615

pass

2649

2616

2650

2617

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2618

# enabled if its last checker was successful. Clients

2652

2619

# whose checker succeeded before we stored its state is

2653

2620

# assumed to have successfully run all checkers during

2654

2621

# downtime.

2657

2624

if not client["last_checked_ok"]:

2658

2625

logger.warning(

2659

2626

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2627

"performed a successful checker"

2628

.format(client_name))

2662

2629

client["enabled"] = False

2663

2630

elif client["last_checker_status"] != 0:

2664

2631

logger.warning(

2665

2632

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2633

" checker failed with error code {}"

2634

.format(client_name,

2635

client["last_checker_status"]))

2670

2636

client["enabled"] = False

2671

2637

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2638

client["expires"] = (datetime.datetime

2639

.utcnow()

2640

+ client["timeout"])

2675

2641

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

2642

" keeping {} enabled"

2643

.format(client_name))

2678

2644

try:

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2645

client["secret"] = (

2646

pgp.decrypt(client["encrypted_secret"],

2647

client_settings[client_name]

2648

["secret"]))

2682

2649

except PGPError:

2683

2650

# If decryption fails, we use secret from new settings

2684

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

2685

client_name))

2686

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

2687

["secret"])

2651

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

2652

.format(client_name))

2653

client["secret"] = (

2654

client_settings[client_name]["secret"])

2688

2655

2689

2656

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

2690

2657

for client_name in (set(old_client_settings)

2697

2664

# Create all client objects

2698

2665

for client_name, client in clients_data.items():

2699

2666

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2667

name = client_name, settings = client,

2702

2668

server_settings = server_settings)

2703

2669

2704

2670

if not tcp_server.clients:

2706

2672

2707

2673

if not foreground:

2708

2674

if pidfile is not None:

2709

pid = os.getpid()

2710

2675

try:

2711

2676

with pidfile:

2712

print(pid, file=pidfile)

2677

pid = os.getpid()

2678

pidfile.write("{}\n".format(pid).encode("utf-8"))

2713

2679

except IOError:

2714

2680

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

2715

2681

pidfilename, pid)

2720

2686

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

2721

2687

2722

2688

if use_dbus:

2723

2724

@alternate_dbus_interfaces(

2725

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

2689

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

2690

"se.bsnet.fukt.Mandos"})

2726

2691

class MandosDBusService(DBusObjectWithProperties):

2727

2692

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

2728

2729

2693

def __init__(self):

2730

2694

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

2731

2732

2695

_interface = "se.recompile.Mandos"

2733

2696

2734

2697

@dbus_interface_annotations(_interface)

2735

2698

def _foo(self):

2736

return {

2737

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

2738

"false" }

2699

return { "org.freedesktop.DBus.Property"

2700

".EmitsChangedSignal":

2701

"false"}

2739

2702

2740

2703

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

2741

2704

def ClientAdded(self, objpath):

2755

2718

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

2756

2719

def GetAllClients(self):

2757

2720

"D-Bus method"

2758

return dbus.Array(c.dbus_object_path for c in

2721

return dbus.Array(c.dbus_object_path

2722

for c in

2759

2723

tcp_server.clients.itervalues())

2760

2724

2761

2725

@dbus.service.method(_interface,

2810

2774

# + secret.

2811

2775

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

2812

2776

"checker", "server_settings" }

2813

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

2814

.Object):

2777

for name, typ in (inspect.getmembers

2778

(dbus.service.Object)):

2815

2779

exclude.add(name)

2816

2780

2817

2781

client_dict["encrypted_secret"] = (client

2824

2788

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

2825

2789

2826

2790

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2791

with (tempfile.NamedTemporaryFile

2792

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

2793

dir=os.path.dirname(stored_state_path),

2794

delete=False)) as stored_state:

2833

2795

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

2834

tempname = stored_state.name

2796

tempname=stored_state.name

2835

2797

os.rename(tempname, stored_state_path)

2836

2798

except (IOError, OSError) as e:

2837

2799

if not debug:

2856

2818

client.disable(quiet=True)

2857

2819

if use_dbus:

2858

2820

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2821

mandos_dbus_service.ClientRemoved(client

2822

.dbus_object_path,

2823

client.name)

2861

2824

client_settings.clear()

2862

2825

2863

2826

atexit.register(cleanup)

2916

2879

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

2917

2880

cleanup()

2918

2881

2919

2920

2882

if __name__ == '__main__':

2921

2883

main()