/mandos/trunk : revision 752

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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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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 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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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 avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.8"

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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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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"))

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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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"""init logger and add loglevel"""

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global syslogger

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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 = (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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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(dir=self.tempdir

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) as passfile:

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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(['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(dir = self.tempdir

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) as passfile:

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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(['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

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= data)

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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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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, 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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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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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):

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def rename(self, remove=True):

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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 = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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self.remove()

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if 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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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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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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def remove(self):

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

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self.rename()

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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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unicode(error))

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

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.format(error))

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str(error))

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

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

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

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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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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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return ret

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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 = { "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 = {

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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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@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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if "secret" in section:

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556

self.expires = None

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557

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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

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

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self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

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self.changedstate = multiprocessing_manager.Condition(

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multiprocessing_manager.Lock())

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self.client_structure = [attr

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for attr in self.__dict__.iterkeys()

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if not attr.startswith("_")]

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self.client_structure.append("client_structure")

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577

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

552

lambda obj:

553

isinstance(obj,

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property)):

578

for name, t in inspect.getmembers(

579

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

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580

if not name.startswith("_"):

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581

self.client_structure.append(name)

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582

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624

# and every interval from then on.

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

602

self.checker_initiator_tag = (gobject.timeout_add

603

(int(self.interval

604

.total_seconds() * 1000),

605

self.start_checker))

627

self.checker_initiator_tag = gobject.timeout_add(

628

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

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self.start_checker)

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

607

631

if self.disable_initiator_tag is not None:

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632

gobject.source_remove(self.disable_initiator_tag)

609

self.disable_initiator_tag = (gobject.timeout_add

610

(int(self.timeout

611

.total_seconds() * 1000),

612

self.disable))

633

self.disable_initiator_tag = gobject.timeout_add(

634

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

613

635

# Also start a new checker *right now*.

614

636

self.start_checker()

615

637

624

646

vars(self))

625

647

self.checked_ok()

626

648

else:

627

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

628

vars(self))

649

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

629

650

else:

630

651

self.last_checker_status = -1

631

652

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

645

666

gobject.source_remove(self.disable_initiator_tag)

646

667

self.disable_initiator_tag = None

647

668

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

648

self.disable_initiator_tag = (gobject.timeout_add

649

(int(timeout.total_seconds()

650

* 1000), self.disable))

669

self.disable_initiator_tag = gobject.timeout_add(

670

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

651

671

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

652

672

653

673

def need_approval(self):

684

704

# Start a new checker if needed

685

705

if self.checker is None:

686

706

# Escape attributes for the shell

687

escaped_attrs = { attr:

688

re.escape(unicode(getattr(self,

689

attr)))

690

for attr in self.runtime_expansions }

707

escaped_attrs = {

708

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

709

for attr in self.runtime_expansions }

691

710

try:

692

711

command = self.checker_command % escaped_attrs

693

712

except TypeError as error:

694

713

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

695

self.checker_command, exc_info=error)

696

return True # Try again later

714

self.checker_command,

715

exc_info=error)

716

return True # Try again later

697

717

self.current_checker_command = command

698

718

try:

699

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

700

command, self.name)

719

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

720

self.name)

701

721

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

702

722

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

703

723

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

712

732

"stderr": wnull })

713

733

self.checker = subprocess.Popen(command,

714

734

close_fds=True,

715

shell=True, cwd="/",

735

shell=True,

736

cwd="/",

716

737

**popen_args)

717

738

except OSError as error:

718

739

logger.error("Failed to start subprocess",

719

740

exc_info=error)

720

741

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

742

self.checker_callback_tag = gobject.child_watch_add(

743

self.checker.pid, self.checker_callback, data=command)

725

744

# The checker may have completed before the gobject

726

745

# watch was added. Check for this.

727

746

try:

758

777

self.checker = None

759

778

760

779

761

def dbus_service_property(dbus_interface, signature="v",

762

access="readwrite", byte_arrays=False):

780

def dbus_service_property(dbus_interface,

781

signature="v",

782

access="readwrite",

783

byte_arrays=False):

763

784

"""Decorators for marking methods of a DBusObjectWithProperties to

764

785

become properties on the D-Bus.

765

786

775

796

if byte_arrays and signature != "ay":

776

797

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

777

798

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

799

778

800

def decorator(func):

779

801

func._dbus_is_property = True

780

802

func._dbus_interface = dbus_interface

785

807

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

786

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

787

809

return func

810

788

811

return decorator

789

812

790

813

799

822

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

800

823

"false"}

801

824

"""

825

802

826

def decorator(func):

803

827

func._dbus_is_interface = True

804

828

func._dbus_interface = dbus_interface

805

829

func._dbus_name = dbus_interface

806

830

return func

831

807

832

return decorator

808

833

809

834

811

836

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

812

837

Usage:

813

838

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

814

842

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

815

843

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

844

def Property_dbus_property(self):

820

845

return dbus.Boolean(False)

821

846

"""

847

822

848

def decorator(func):

823

849

func._dbus_annotations = annotations

824

850

return func

851

825

852

return decorator

826

853

827

854

830

857

"""

831

858

pass

832

859

860

833

861

class DBusPropertyAccessException(DBusPropertyException):

834

862

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

835

863

"""

863

891

def _get_all_dbus_things(self, thing):

864

892

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

865

893

"""

866

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

867

name),

894

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

868

895

athing.__get__(self))

869

896

for cls in self.__class__.__mro__

870

897

for name, athing in

871

inspect.getmembers(cls,

872

self._is_dbus_thing(thing)))

898

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

873

899

874

900

def _get_dbus_property(self, interface_name, property_name):

875

901

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

876

902

property with the specified name and interface.

877

903

"""

878

for cls in self.__class__.__mro__:

879

for name, value in (inspect.getmembers

880

(cls,

881

self._is_dbus_thing("property"))):

904

for cls in self.__class__.__mro__:

905

for name, value in inspect.getmembers(

906

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

882

907

if (value._dbus_name == property_name

883

908

and value._dbus_interface == interface_name):

884

909

return value.__get__(self)

885

910

886

911

# No such property

887

raise DBusPropertyNotFound(self.dbus_object_path + ":"

888

+ interface_name + "."

889

+ property_name)

912

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

913

self.dbus_object_path, interface_name, property_name))

890

914

891

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

915

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

in_signature="ss",

892

917

out_signature="v")

893

918

def Get(self, interface_name, property_name):

894

919

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

919

944

for byte in value))

920

945

prop(value)

921

946

922

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

947

@dbus.service.method(dbus.PROPERTIES_IFACE,

948

in_signature="s",

923

949

out_signature="a{sv}")

924

950

def GetAll(self, interface_name):

925

951

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

940

966

if not hasattr(value, "variant_level"):

941

967

properties[name] = value

942

968

continue

943

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

944

value.variant_level+1)

969

properties[name] = type(value)(

970

value, variant_level = value.variant_level + 1)

945

971

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

946

972

973

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

974

def PropertiesChanged(self, interface_name, changed_properties,

975

invalidated_properties):

976

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

977

standard.

978

"""

979

pass

980

947

981

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

948

982

out_signature="s",

949

983

path_keyword='object_path',

957

991

connection)

958

992

try:

959

993

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

994

960

995

def make_tag(document, name, prop):

961

996

e = document.createElement("property")

962

997

e.setAttribute("name", name)

963

998

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

964

999

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

965

1000

return e

1001

966

1002

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

967

1003

# Add property tags

968

1004

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

980

1016

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

981

1017

and prop._dbus_interface

982

1018

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

987

1021

for name, value in annots.items():

988

1022

ann_tag = document.createElement(

989

1023

"annotation")

994

1028

for annotation, value in dict(

995

1029

itertools.chain.from_iterable(

996

1030

annotations().items()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

999

1033

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

1000

1034

)).items():

1001

1035

ann_tag = document.createElement("annotation")

1030

1064

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

1031

1065

if dt is None:

1032

1066

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

1033

return dbus.String(dt.isoformat(),

1034

variant_level=variant_level)

1067

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

1035

1068

1036

1069

1037

1070

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1057

1090

(from DBusObjectWithProperties) and interfaces (from the

1058

1091

dbus_interface_annotations decorator).

1059

1092

"""

1093

1060

1094

def wrapper(cls):

1061

1095

for orig_interface_name, alt_interface_name in (

1062

alt_interface_names.items()):

1096

alt_interface_names.items()):

1063

1097

attr = {}

1064

1098

interface_names = set()

1065

1099

# Go though all attributes of the class

1067

1101

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

1068

1102

# with the wrong interface name

1069

1103

if (not hasattr(attribute, "_dbus_interface")

1070

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

1104

or not attribute._dbus_interface.startswith(

1105

orig_interface_name)):

1072

1106

continue

1073

1107

# Create an alternate D-Bus interface name based on

1074

1108

# the current name

1075

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1109

alt_interface = attribute._dbus_interface.replace(

1110

orig_interface_name, alt_interface_name)

1078

1111

interface_names.add(alt_interface)

1079

1112

# Is this a D-Bus signal?

1080

1113

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

1081

1114

# Extract the original non-method undecorated

1082

1115

# function by black magic

1083

1116

nonmethod_func = (dict(

1084

zip(attribute.func_code.co_freevars,

1085

attribute.__closure__))["func"]

1086

.cell_contents)

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1087

1120

# Create a new, but exactly alike, function

1088

1121

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

1089

1122

# with the alternate D-Bus interface name

1090

new_function = (dbus.service.signal

1091

(alt_interface,

1092

attribute._dbus_signature)

1123

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1093

1125

(types.FunctionType(

1094

nonmethod_func.func_code,

1095

nonmethod_func.func_globals,

1096

nonmethod_func.func_name,

1097

nonmethod_func.func_defaults,

1098

nonmethod_func.func_closure)))

1126

nonmethod_func.func_code,

1127

nonmethod_func.func_globals,

1128

nonmethod_func.func_name,

1129

nonmethod_func.func_defaults,

1130

nonmethod_func.func_closure)))

1099

1131

# Copy annotations, if any

1100

1132

try:

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1103

1135

except AttributeError:

1104

1136

pass

1105

1137

# Define a creator of a function to call both the

1110

1142

"""This function is a scope container to pass

1111

1143

func1 and func2 to the "call_both" function

1112

1144

outside of its arguments"""

1145

1113

1146

def call_both(*args, **kwargs):

1114

1147

"""This function will emit two D-Bus

1115

1148

signals by calling func1 and func2"""

1116

1149

func1(*args, **kwargs)

1117

1150

func2(*args, **kwargs)

1151

1118

1152

return call_both

1119

1153

# Create the "call_both" function and add it to

1120

1154

# the class

1125

1159

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

1126

1160

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

1127

1161

# to the class.

1128

attr[attrname] = (dbus.service.method

1129

(alt_interface,

1130

attribute._dbus_in_signature,

1131

attribute._dbus_out_signature)

1132

(types.FunctionType

1133

(attribute.func_code,

1134

attribute.func_globals,

1135

attribute.func_name,

1136

attribute.func_defaults,

1137

attribute.func_closure)))

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

1172

# Copy annotations, if any

1139

1173

try:

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1142

1176

except AttributeError:

1143

1177

pass

1144

1178

# Is this a D-Bus property?

1147

1181

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

1148

1182

# property with the alternate D-Bus interface

1149

1183

# name. Add it to the class.

1150

attr[attrname] = (dbus_service_property

1151

(alt_interface,

1152

attribute._dbus_signature,

1153

attribute._dbus_access,

1154

attribute

1155

._dbus_get_args_options

1156

["byte_arrays"])

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

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)))

1163

1195

# Copy annotations, if any

1164

1196

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1167

1199

except AttributeError:

1168

1200

pass

1169

1201

# Is this a D-Bus interface?

1172

1204

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

1173

1205

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

1174

1206

# to the class.

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

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)))

1183

1214

if deprecate:

1184

1215

# Deprecate all alternate interfaces

1185

1216

iname="_AlternateDBusNames_interface_annotation{}"

1186

1217

for interface_name in interface_names:

1218

1187

1219

@dbus_interface_annotations(interface_name)

1188

1220

def func(self):

1189

1221

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

1190

"true" }

1222

"true" }

1191

1223

# Find an unused name

1192

1224

for aname in (iname.format(i)

1193

1225

for i in itertools.count()):

1198

1230

# Replace the class with a new subclass of it with

1199

1231

# methods, signals, etc. as created above.

1200

1232

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

1201

(cls,), attr)

1233

(cls, ), attr)

1202

1234

return cls

1235

1203

1236

return wrapper

1204

1237

1205

1238

1206

1239

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

1207

"se.bsnet.fukt.Mandos"})

1240

"se.bsnet.fukt.Mandos"})

1208

1241

class ClientDBus(Client, DBusObjectWithProperties):

1209

1242

"""A Client class using D-Bus

1210

1243

1214

1247

"""

1215

1248

1216

1249

runtime_expansions = (Client.runtime_expansions

1217

+ ("dbus_object_path",))

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

1218

1253

1219

1254

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

1220

1255

1223

1258

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

1224

1259

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

1225

1260

# the D-Bus

1226

client_object_name = unicode(self.name).translate(

1261

client_object_name = str(self.name).translate(

1227

1262

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

1228

1263

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

1229

self.dbus_object_path = (dbus.ObjectPath

1230

("/clients/" + client_object_name))

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1231

1266

DBusObjectWithProperties.__init__(self, self.bus,

1232

1267

self.dbus_object_path)

1233

1268

1234

def notifychangeproperty(transform_func,

1235

dbus_name, type_func=lambda x: x,

1236

variant_level=1):

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1237

1274

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

1238

1275

its changes to DBus.

1239

1276

1245

1282

variant_level: D-Bus variant level. Default: 1

1246

1283

"""

1247

1284

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

1285

1248

1286

def setter(self, value):

1249

1287

if hasattr(self, "dbus_object_path"):

1250

1288

if (not hasattr(self, attrname) or

1251

1289

type_func(getattr(self, attrname, None))

1252

1290

!= type_func(value)):

1253

dbus_value = transform_func(type_func(value),

1254

variant_level

1255

=variant_level)

1256

self.PropertyChanged(dbus.String(dbus_name),

1257

dbus_value)

1291

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1295

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1299

self.PropertyChanged(dbus.String(dbus_name),

1300

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1258

1306

setattr(self, attrname, value)

1259

1307

1260

1308

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

1266

1314

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

1267

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1268

1316

"LastEnabled")

1269

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

1270

type_func = lambda checker:

1271

checker is not None)

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1272

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1273

1321

"LastCheckedOK")

1274

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1277

1325

datetime_to_dbus, "LastApprovalRequest")

1278

1326

approved_by_default = notifychangeproperty(dbus.Boolean,

1279

1327

"ApprovedByDefault")

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1281

"ApprovalDelay",

1282

type_func =

1283

lambda td: td.total_seconds()

1284

* 1000)

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1285

1331

approval_duration = notifychangeproperty(

1286

1332

dbus.UInt64, "ApprovalDuration",

1287

1333

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

1288

1334

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

1289

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

1290

type_func = lambda td:

1291

td.total_seconds() * 1000)

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1292

1338

extended_timeout = notifychangeproperty(

1293

1339

dbus.UInt64, "ExtendedTimeout",

1294

1340

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

1295

interval = notifychangeproperty(dbus.UInt64,

1296

"Interval",

1297

type_func =

1298

lambda td: td.total_seconds()

1299

* 1000)

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1300

1344

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

1345

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

1346

invalidate_only=True)

1301

1347

1302

1348

del notifychangeproperty

1303

1349

1350

1396

self.send_changedstate()

1351

1397

1352

1398

## D-Bus methods, signals & properties

1353

_interface = "se.recompile.Mandos.Client"

1354

1399

1355

1400

## Interfaces

1356

1401

1357

@dbus_interface_annotations(_interface)

1358

def _foo(self):

1359

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

1360

"false"}

1361

1362

1402

## Signals

1363

1403

1364

1404

# CheckerCompleted - signal

1374

1414

pass

1375

1415

1376

1416

# PropertyChanged - signal

1417

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

1377

1418

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

1378

1419

def PropertyChanged(self, property, value):

1379

1420

"D-Bus signal"

1443

1484

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

1444

1485

1445

1486

# ApprovedByDefault - property

1446

@dbus_service_property(_interface, signature="b",

1487

@dbus_service_property(_interface,

1488

signature="b",

1447

1489

access="readwrite")

1448

1490

def ApprovedByDefault_dbus_property(self, value=None):

1449

1491

if value is None: # get

1451

1493

self.approved_by_default = bool(value)

1452

1494

1453

1495

# ApprovalDelay - property

1454

@dbus_service_property(_interface, signature="t",

1496

@dbus_service_property(_interface,

1497

signature="t",

1455

1498

access="readwrite")

1456

1499

def ApprovalDelay_dbus_property(self, value=None):

1457

1500

if value is None: # get

1460

1503

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

1461

1504

1462

1505

# ApprovalDuration - property

1463

@dbus_service_property(_interface, signature="t",

1506

@dbus_service_property(_interface,

1507

signature="t",

1464

1508

access="readwrite")

1465

1509

def ApprovalDuration_dbus_property(self, value=None):

1466

1510

if value is None: # get

1479

1523

return dbus.String(self.fingerprint)

1480

1524

1481

1525

# Host - property

1482

@dbus_service_property(_interface, signature="s",

1526

@dbus_service_property(_interface,

1527

signature="s",

1483

1528

access="readwrite")

1484

1529

def Host_dbus_property(self, value=None):

1485

1530

if value is None: # get

1486

1531

return dbus.String(self.host)

1487

self.host = unicode(value)

1532

self.host = str(value)

1488

1533

1489

1534

# Created - property

1490

1535

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

1497

1542

return datetime_to_dbus(self.last_enabled)

1498

1543

1499

1544

# Enabled - property

1500

@dbus_service_property(_interface, signature="b",

1545

@dbus_service_property(_interface,

1546

signature="b",

1501

1547

access="readwrite")

1502

1548

def Enabled_dbus_property(self, value=None):

1503

1549

if value is None: # get

1508

1554

self.disable()

1509

1555

1510

1556

# LastCheckedOK - property

1511

@dbus_service_property(_interface, signature="s",

1557

@dbus_service_property(_interface,

1558

signature="s",

1512

1559

access="readwrite")

1513

1560

def LastCheckedOK_dbus_property(self, value=None):

1514

1561

if value is not None:

1517

1564

return datetime_to_dbus(self.last_checked_ok)

1518

1565

1519

1566

# LastCheckerStatus - property

1520

@dbus_service_property(_interface, signature="n",

1521

access="read")

1567

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

1522

1568

def LastCheckerStatus_dbus_property(self):

1523

1569

return dbus.Int16(self.last_checker_status)

1524

1570

1533

1579

return datetime_to_dbus(self.last_approval_request)

1534

1580

1535

1581

# Timeout - property

1536

@dbus_service_property(_interface, signature="t",

1582

@dbus_service_property(_interface,

1583

signature="t",

1537

1584

access="readwrite")

1538

1585

def Timeout_dbus_property(self, value=None):

1539

1586

if value is None: # get

1552

1599

is None):

1553

1600

return

1554

1601

gobject.source_remove(self.disable_initiator_tag)

1555

self.disable_initiator_tag = (

1556

gobject.timeout_add(

1557

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

1558

* 1000), self.disable))

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1559

1605

1560

1606

# ExtendedTimeout - property

1561

@dbus_service_property(_interface, signature="t",

1607

@dbus_service_property(_interface,

1608

signature="t",

1562

1609

access="readwrite")

1563

1610

def ExtendedTimeout_dbus_property(self, value=None):

1564

1611

if value is None: # get

1567

1614

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

1568

1615

1569

1616

# Interval - property

1570

@dbus_service_property(_interface, signature="t",

1617

@dbus_service_property(_interface,

1618

signature="t",

1571

1619

access="readwrite")

1572

1620

def Interval_dbus_property(self, value=None):

1573

1621

if value is None: # get

1578

1626

if self.enabled:

1579

1627

# Reschedule checker run

1580

1628

gobject.source_remove(self.checker_initiator_tag)

1581

self.checker_initiator_tag = (gobject.timeout_add

1582

(value, self.start_checker))

1583

self.start_checker() # Start one now, too

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1584

1632

1585

1633

# Checker - property

1586

@dbus_service_property(_interface, signature="s",

1634

@dbus_service_property(_interface,

1635

signature="s",

1587

1636

access="readwrite")

1588

1637

def Checker_dbus_property(self, value=None):

1589

1638

if value is None: # get

1590

1639

return dbus.String(self.checker_command)

1591

self.checker_command = unicode(value)

1640

self.checker_command = str(value)

1592

1641

1593

1642

# CheckerRunning - property

1594

@dbus_service_property(_interface, signature="b",

1643

@dbus_service_property(_interface,

1644

signature="b",

1595

1645

access="readwrite")

1596

1646

def CheckerRunning_dbus_property(self, value=None):

1597

1647

if value is None: # get

1607

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1608

1658

1609

1659

# Secret = property

1610

@dbus_service_property(_interface, signature="ay",

1611

access="write", byte_arrays=True)

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1612

1664

def Secret_dbus_property(self, value):

1613

1665

self.secret = bytes(value)

1614

1666

1620

1672

self._pipe = child_pipe

1621

1673

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

1622

1674

if not self._pipe.recv():

1623

raise KeyError()

1675

raise KeyError(fpr)

1624

1676

1625

1677

def __getattribute__(self, name):

1626

1678

if name == '_pipe':

1630

1682

if data[0] == 'data':

1631

1683

return data[1]

1632

1684

if data[0] == 'function':

1685

1633

1686

def func(*args, **kwargs):

1634

1687

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

1635

1688

return self._pipe.recv()[1]

1689

1636

1690

return func

1637

1691

1638

1692

def __setattr__(self, name, value):

1650

1704

def handle(self):

1651

1705

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

1652

1706

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

1653

unicode(self.client_address))

1707

str(self.client_address))

1654

1708

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

1655

1709

self.server.child_pipe.fileno())

1656

1710

1657

session = (gnutls.connection

1658

.ClientSession(self.request,

1659

gnutls.connection

1660

.X509Credentials()))

1711

session = gnutls.connection.ClientSession(

1712

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

1661

1713

1662

1714

# Note: gnutls.connection.X509Credentials is really a

1663

1715

# generic GnuTLS certificate credentials object so long as

1672

1724

priority = self.server.gnutls_priority

1673

1725

if priority is None:

1674

1726

priority = "NORMAL"

1675

(gnutls.library.functions

1676

.gnutls_priority_set_direct(session._c_object,

1677

priority, None))

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1678

1729

1679

1730

# Start communication using the Mandos protocol

1680

1731

# Get protocol number

1700

1751

approval_required = False

1701

1752

try:

1702

1753

try:

1703

fpr = self.fingerprint(self.peer_certificate

1704

(session))

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1705

1756

except (TypeError,

1706

1757

gnutls.errors.GNUTLSError) as error:

1707

1758

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

1722

1773

while True:

1723

1774

if not client.enabled:

1724

1775

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

1725

client.name)

1776

client.name)

1726

1777

if self.server.use_dbus:

1727

1778

# Emit D-Bus signal

1728

1779

client.Rejected("Disabled")

1775

1826

logger.warning("gnutls send failed",

1776

1827

exc_info=error)

1777

1828

return

1778

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

1779

sent, len(client.secret)

1780

- (sent_size + sent))

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1781

1832

sent_size += sent

1782

1833

1783

1834

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

1800

1851

def peer_certificate(session):

1801

1852

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

1802

1853

# If not an OpenPGP certificate...

1803

if (gnutls.library.functions

1804

.gnutls_certificate_type_get(session._c_object)

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1805

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1806

1857

# ...do the normal thing

1807

1858

return session.peer_certificate

1821

1872

def fingerprint(openpgp):

1822

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1823

1874

# New GnuTLS "datum" with the OpenPGP public key

1824

datum = (gnutls.library.types

1825

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

1826

ctypes.POINTER

1827

(ctypes.c_ubyte)),

1828

ctypes.c_uint(len(openpgp))))

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)))

1829

1879

# New empty GnuTLS certificate

1830

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1831

(gnutls.library.functions

1832

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1833

1883

# Import the OpenPGP public key into the certificate

1834

(gnutls.library.functions

1835

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

1836

gnutls.library.constants

1837

.GNUTLS_OPENPGP_FMT_RAW))

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1838

1887

# Verify the self signature in the key

1839

1888

crtverify = ctypes.c_uint()

1840

(gnutls.library.functions

1841

.gnutls_openpgp_crt_verify_self(crt, 0,

1842

ctypes.byref(crtverify)))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1843

1891

if crtverify.value != 0:

1844

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1845

raise (gnutls.errors.CertificateSecurityError

1846

("Verify failed"))

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1847

1895

# New buffer for the fingerprint

1848

1896

buf = ctypes.create_string_buffer(20)

1849

1897

buf_len = ctypes.c_size_t()

1850

1898

# Get the fingerprint from the certificate into the buffer

1851

(gnutls.library.functions

1852

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

1853

ctypes.byref(buf_len)))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1854

1901

# Deinit the certificate

1855

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1856

1903

# Convert the buffer to a Python bytestring

1862

1909

1863

1910

class MultiprocessingMixIn(object):

1864

1911

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

1912

1865

1913

def sub_process_main(self, request, address):

1866

1914

try:

1867

1915

self.finish_request(request, address)

1879

1927

1880

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1881

1929

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

1930

1882

1931

def process_request(self, request, client_address):

1883

1932

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

1884

1933

1905

1954

interface: None or a network interface name (string)

1906

1955

use_ipv6: Boolean; to use IPv6 or not

1907

1956

"""

1957

1908

1958

def __init__(self, server_address, RequestHandlerClass,

1909

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

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1910

1962

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

1911

1963

creating a new one with socket.socket().

1912

1964

"""

1953

2005

self.interface)

1954

2006

else:

1955

2007

try:

1956

self.socket.setsockopt(socket.SOL_SOCKET,

1957

SO_BINDTODEVICE,

1958

(self.interface + "\0")

1959

.encode("utf-8"))

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1960

2011

except socket.error as error:

1961

2012

if error.errno == errno.EPERM:

1962

2013

logger.error("No permission to bind to"

1980

2031

self.server_address = (any_address,

1981

2032

self.server_address[1])

1982

2033

elif not self.server_address[1]:

1983

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

1984

0)

2034

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

1985

2035

# if self.interface:

1986

2036

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

1987

2037

# 0, # port

2001

2051

2002

2052

Assumes a gobject.MainLoop event loop.

2003

2053

"""

2054

2004

2055

def __init__(self, server_address, RequestHandlerClass,

2005

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

2006

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

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

2007

2062

self.enabled = False

2008

2063

self.clients = clients

2009

2064

if self.clients is None:

2015

2070

interface = interface,

2016

2071

use_ipv6 = use_ipv6,

2017

2072

socketfd = socketfd)

2073

2018

2074

def server_activate(self):

2019

2075

if self.enabled:

2020

2076

return socketserver.TCPServer.server_activate(self)

2024

2080

2025

2081

def add_pipe(self, parent_pipe, proc):

2026

2082

# Call "handle_ipc" for both data and EOF events

2027

gobject.io_add_watch(parent_pipe.fileno(),

2028

gobject.IO_IN | gobject.IO_HUP,

2029

functools.partial(self.handle_ipc,

2030

parent_pipe =

2031

parent_pipe,

2032

proc = proc))

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))

2033

2089

2034

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

2035

proc = None, client_object=None):

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2036

2094

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

2037

2095

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

2038

2096

# Wait for other process to exit

2061

2119

parent_pipe.send(False)

2062

2120

return False

2063

2121

2064

gobject.io_add_watch(parent_pipe.fileno(),

2065

gobject.IO_IN | gobject.IO_HUP,

2066

functools.partial(self.handle_ipc,

2067

parent_pipe =

2068

parent_pipe,

2069

proc = proc,

2070

client_object =

2071

client))

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))

2072

2129

parent_pipe.send(True)

2073

2130

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

2074

2131

# same fileno

2080

2137

2081

2138

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

2082

2139

funcname)(*args,

2083

**kwargs)))

2140

**kwargs)))

2084

2141

2085

2142

if command == 'getattr':

2086

2143

attrname = request[1]

2087

2144

if callable(client_object.__getattribute__(attrname)):

2088

parent_pipe.send(('function',))

2145

parent_pipe.send(('function', ))

2089

2146

else:

2090

parent_pipe.send(('data', client_object

2091

.__getattribute__(attrname)))

2147

parent_pipe.send((

2148

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

2092

2149

2093

2150

if command == 'setattr':

2094

2151

attrname = request[1]

2134

2191

# None

2135

2192

"followers")) # Tokens valid after

2136

2193

# this token

2194

Token = collections.namedtuple("Token", (

2195

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

2196

# a "group" containing digits

2197

"value", # datetime.timedelta or None

2198

"followers")) # Tokens valid after this token

2137

2199

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

2138

2200

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

2139

2201

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

2140

2202

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

2141

2203

datetime.timedelta(seconds=1),

2142

frozenset((token_end,)))

2204

frozenset((token_end, )))

2143

2205

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

2144

2206

datetime.timedelta(minutes=1),

2145

2207

frozenset((token_second, token_end)))

2161

2223

frozenset((token_month, token_end)))

2162

2224

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

2163

2225

datetime.timedelta(weeks=1),

2164

frozenset((token_end,)))

2226

frozenset((token_end, )))

2165

2227

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

2166

2228

frozenset((token_year, token_month,

2167

2229

token_day, token_time,

2192

2254

break

2193

2255

else:

2194

2256

# No currently valid tokens were found

2195

raise ValueError("Invalid RFC 3339 duration")

2257

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

2258

.format(duration))

2196

2259

# End token found

2197

2260

return value

2198

2261

2235

2298

elif suffix == "w":

2236

2299

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

2237

2300

else:

2238

raise ValueError("Unknown suffix {!r}"

2239

.format(suffix))

2301

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

2240

2302

except IndexError as e:

2241

2303

raise ValueError(*(e.args))

2242

2304

timevalue += delta

2258

2320

# Close all standard open file descriptors

2259

2321

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

2260

2322

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

2261

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

2323

raise OSError(errno.ENODEV,

2324

"{} not a character device"

2262

2325

.format(os.devnull))

2263

2326

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

2264

2327

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

2330

2393

"port": "",

2331

2394

"debug": "False",

2332

2395

"priority":

2333

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

2396

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

2397

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

2334

2398

"servicename": "Mandos",

2335

2399

"use_dbus": "True",

2336

2400

"use_ipv6": "True",

2340

2404

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

2341

2405

"foreground": "False",

2342

2406

"zeroconf": "True",

2343

}

2407

}

2344

2408

2345

2409

# Parse config file for server-global settings

2346

2410

server_config = configparser.SafeConfigParser(server_defaults)

2347

2411

del server_defaults

2348

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

2349

"mandos.conf"))

2412

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

2350

2413

# Convert the SafeConfigParser object to a dict

2351

2414

server_settings = server_config.defaults()

2352

2415

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

2370

2433

# Override the settings from the config file with command line

2371

2434

# options, if set.

2372

2435

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

2373

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

2374

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

2375

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

2436

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

2437

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

2438

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

2376

2439

value = getattr(options, option)

2377

2440

if value is not None:

2378

2441

server_settings[option] = value

2393

2456

2394

2457

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

2395

2458

2396

if (not server_settings["zeroconf"] and

2397

not (server_settings["port"]

2398

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

2399

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

2400

" Zeroconf")

2459

if (not server_settings["zeroconf"]

2460

and not (server_settings["port"]

2461

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

2462

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

2401

2463

2402

2464

# For convenience

2403

2465

debug = server_settings["debug"]

2419

2481

initlogger(debug, level)

2420

2482

2421

2483

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

2422

syslogger.setFormatter(logging.Formatter

2423

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

2424

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

2425

.format(server_settings

2426

["servicename"])))

2484

syslogger.setFormatter(

2485

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

2486

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

2487

server_settings["servicename"])))

2427

2488

2428

2489

# Parse config file with clients

2429

2490

client_config = configparser.SafeConfigParser(Client

2437

2498

socketfd = None

2438

2499

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

2439

2500

socketfd = server_settings["socket"]

2440

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

2441

server_settings["port"]),

2442

ClientHandler,

2443

interface=(server_settings["interface"]

2444

or None),

2445

use_ipv6=use_ipv6,

2446

gnutls_priority=

2447

server_settings["priority"],

2448

use_dbus=use_dbus,

2449

socketfd=socketfd)

2501

tcp_server = MandosServer(

2502

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

2503

ClientHandler,

2504

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

2505

use_ipv6=use_ipv6,

2506

gnutls_priority=server_settings["priority"],

2507

use_dbus=use_dbus,

2508

socketfd=socketfd)

2450

2509

if not foreground:

2451

2510

pidfilename = "/run/mandos.pid"

2452

2511

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

2453

2512

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

2454

2513

pidfile = None

2455

2514

try:

2456

pidfile = open(pidfilename, "w")

2515

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

2457

2516

except IOError as e:

2458

2517

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

2459

2518

exc_info=e)

2486

2545

def debug_gnutls(level, string):

2487

2546

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

2488

2547

2489

(gnutls.library.functions

2490

.gnutls_global_set_log_function(debug_gnutls))

2548

gnutls.library.functions.gnutls_global_set_log_function(

2549

debug_gnutls)

2491

2550

2492

2551

# Redirect stdin so all checkers get /dev/null

2493

2552

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

2513

2572

if use_dbus:

2514

2573

try:

2515

2574

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

2516

bus, do_not_queue=True)

2517

old_bus_name = (dbus.service.BusName

2518

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

2519

do_not_queue=True))

2520

except dbus.exceptions.NameExistsException as e:

2575

bus,

2576

do_not_queue=True)

2577

old_bus_name = dbus.service.BusName(

2578

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

2579

do_not_queue=True)

2580

except dbus.exceptions.DBusException as e:

2521

2581

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

2522

2582

use_dbus = False

2523

2583

server_settings["use_dbus"] = False

2524

2584

tcp_server.use_dbus = False

2525

2585

if zeroconf:

2526

2586

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2527

service = AvahiServiceToSyslog(name =

2528

server_settings["servicename"],

2529

servicetype = "_mandos._tcp",

2530

protocol = protocol, bus = bus)

2587

service = AvahiServiceToSyslog(

2588

name = server_settings["servicename"],

2589

servicetype = "_mandos._tcp",

2590

protocol = protocol,

2591

bus = bus)

2531

2592

if server_settings["interface"]:

2532

service.interface = (if_nametoindex

2533

(server_settings["interface"]

2534

.encode("utf-8")))

2593

service.interface = if_nametoindex(

2594

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

2535

2595

2536

2596

global multiprocessing_manager

2537

2597

multiprocessing_manager = multiprocessing.Manager()

2556

2616

if server_settings["restore"]:

2557

2617

try:

2558

2618

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

2559

clients_data, old_client_settings = (pickle.load

2560

(stored_state))

2619

clients_data, old_client_settings = pickle.load(

2620

stored_state)

2561

2621

os.remove(stored_state_path)

2562

2622

except IOError as e:

2563

2623

if e.errno == errno.ENOENT:

2564

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

2565

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

2624

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

2625

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

2566

2626

else:

2567

2627

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

2568

2628

exc_info=e)

2569

2629

raise

2570

2630

except EOFError as e:

2571

2631

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

2572

"EOFError:", exc_info=e)

2632

"EOFError:",

2633

exc_info=e)

2573

2634

2574

2635

with PGPEngine() as pgp:

2575

2636

for client_name, client in clients_data.items():

2587

2648

# For each value in new config, check if it

2588

2649

# differs from the old config value (Except for

2589

2650

# the "secret" attribute)

2590

if (name != "secret" and

2591

value != old_client_settings[client_name]

2592

[name]):

2651

if (name != "secret"

2652

and (value !=

2653

old_client_settings[client_name][name])):

2593

2654

client[name] = value

2594

2655

except KeyError:

2595

2656

pass

2604

2665

if not client["last_checked_ok"]:

2605

2666

logger.warning(

2606

2667

"disabling client {} - Client never "

2607

"performed a successful checker"

2608

.format(client_name))

2668

"performed a successful checker".format(

2669

client_name))

2609

2670

client["enabled"] = False

2610

2671

elif client["last_checker_status"] != 0:

2611

2672

logger.warning(

2612

2673

"disabling client {} - Client last"

2613

" checker failed with error code {}"

2614

.format(client_name,

2615

client["last_checker_status"]))

2674

" checker failed with error code"

2675

" {}".format(

2676

client_name,

2677

client["last_checker_status"]))

2616

2678

client["enabled"] = False

2617

2679

else:

2618

client["expires"] = (datetime.datetime

2619

.utcnow()

2620

+ client["timeout"])

2680

client["expires"] = (

2681

datetime.datetime.utcnow()

2682

+ client["timeout"])

2621

2683

logger.debug("Last checker succeeded,"

2622

" keeping {} enabled"

2623

.format(client_name))

2684

" keeping {} enabled".format(

2685

client_name))

2624

2686

try:

2625

client["secret"] = (

2626

pgp.decrypt(client["encrypted_secret"],

2627

client_settings[client_name]

2628

["secret"]))

2687

client["secret"] = pgp.decrypt(

2688

client["encrypted_secret"],

2689

client_settings[client_name]["secret"])

2629

2690

except PGPError:

2630

2691

# If decryption fails, we use secret from new settings

2631

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

2632

.format(client_name))

2633

client["secret"] = (

2634

client_settings[client_name]["secret"])

2692

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

2693

client_name))

2694

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

2695

["secret"])

2635

2696

2636

2697

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

2637

2698

for client_name in (set(old_client_settings)

2644

2705

# Create all client objects

2645

2706

for client_name, client in clients_data.items():

2646

2707

tcp_server.clients[client_name] = client_class(

2647

name = client_name, settings = client,

2708

name = client_name,

2709

settings = client,

2648

2710

server_settings = server_settings)

2649

2711

2650

2712

if not tcp_server.clients:

2652

2714

2653

2715

if not foreground:

2654

2716

if pidfile is not None:

2717

pid = os.getpid()

2655

2718

try:

2656

2719

with pidfile:

2657

pid = os.getpid()

2658

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

2720

print(pid, file=pidfile)

2659

2721

except IOError:

2660

2722

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

2661

2723

pidfilename, pid)

2666

2728

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

2667

2729

2668

2730

if use_dbus:

2669

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

2670

"se.bsnet.fukt.Mandos"})

2731

2732

@alternate_dbus_interfaces(

2733

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

2671

2734

class MandosDBusService(DBusObjectWithProperties):

2672

2735

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

2736

2673

2737

def __init__(self):

2674

2738

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

2739

2675

2740

_interface = "se.recompile.Mandos"

2676

2741

2677

2742

@dbus_interface_annotations(_interface)

2678

2743

def _foo(self):

2679

return { "org.freedesktop.DBus.Property"

2680

".EmitsChangedSignal":

2681

"false"}

2744

return {

2745

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

2746

"false" }

2682

2747

2683

2748

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

2684

2749

def ClientAdded(self, objpath):

2698

2763

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

2699

2764

def GetAllClients(self):

2700

2765

"D-Bus method"

2701

return dbus.Array(c.dbus_object_path

2702

for c in

2766

return dbus.Array(c.dbus_object_path for c in

2703

2767

tcp_server.clients.itervalues())

2704

2768

2705

2769

@dbus.service.method(_interface,

2707

2771

def GetAllClientsWithProperties(self):

2708

2772

"D-Bus method"

2709

2773

return dbus.Dictionary(

2710

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

2711

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

2774

{ c.dbus_object_path: c.GetAll("")

2775

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

2712

2776

signature="oa{sv}")

2713

2777

2714

2778

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

2754

2818

# + secret.

2755

2819

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

2756

2820

"checker", "server_settings" }

2757

for name, typ in (inspect.getmembers

2758

(dbus.service.Object)):

2821

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

2822

.Object):

2759

2823

exclude.add(name)

2760

2824

2761

2825

client_dict["encrypted_secret"] = (client

2768

2832

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

2769

2833

2770

2834

try:

2771

with (tempfile.NamedTemporaryFile

2772

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

2773

dir=os.path.dirname(stored_state_path),

2774

delete=False)) as stored_state:

2835

with tempfile.NamedTemporaryFile(

2836

mode='wb',

2837

suffix=".pickle",

2838

prefix='clients-',

2839

dir=os.path.dirname(stored_state_path),

2840

delete=False) as stored_state:

2775

2841

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

2776

tempname=stored_state.name

2842

tempname = stored_state.name

2777

2843

os.rename(tempname, stored_state_path)

2778

2844

except (IOError, OSError) as e:

2779

2845

if not debug:

2798

2864

client.disable(quiet=True)

2799

2865

if use_dbus:

2800

2866

# Emit D-Bus signal

2801

mandos_dbus_service.ClientRemoved(client

2802

.dbus_object_path,

2803

client.name)

2867

mandos_dbus_service.ClientRemoved(

2868

client.dbus_object_path, client.name)

2804

2869

client_settings.clear()

2805

2870

2806

2871

atexit.register(cleanup)

2859

2924

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

2860

2925

cleanup()

2861

2926

2927

2862

2928

if __name__ == '__main__':

2863

2929

main()