/mandos/trunk : revision 753

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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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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.8"

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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 = str(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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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}"

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.format(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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426

403

427

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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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self.expires = None

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557

530

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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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568

self.current_checker_command = None

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569

self.approved = None

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570

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),

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lambda obj:

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isinstance(obj,

557

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)

560

582

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# 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)

605

self.checker_initiator_tag = (gobject.timeout_add

606

(int(self.interval

607

.total_seconds() * 1000),

608

self.start_checker))

627

self.checker_initiator_tag = gobject.timeout_add(

628

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

629

self.start_checker)

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630

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

610

631

if self.disable_initiator_tag is not None:

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632

gobject.source_remove(self.disable_initiator_tag)

612

self.disable_initiator_tag = (gobject.timeout_add

613

(int(self.timeout

614

.total_seconds() * 1000),

615

self.disable))

633

self.disable_initiator_tag = gobject.timeout_add(

634

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

616

635

# Also start a new checker *right now*.

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self.start_checker()

618

637

627

646

vars(self))

628

647

self.checked_ok()

629

648

else:

630

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

631

vars(self))

649

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

632

650

else:

633

651

self.last_checker_status = -1

634

652

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

648

666

gobject.source_remove(self.disable_initiator_tag)

649

667

self.disable_initiator_tag = None

650

668

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

651

self.disable_initiator_tag = (gobject.timeout_add

652

(int(timeout.total_seconds()

653

* 1000), self.disable))

669

self.disable_initiator_tag = gobject.timeout_add(

670

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

654

671

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

655

672

656

673

def need_approval(self):

687

704

# Start a new checker if needed

688

705

if self.checker is None:

689

706

# Escape attributes for the shell

690

escaped_attrs = { attr:

691

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

692

for attr in self.runtime_expansions }

707

escaped_attrs = {

708

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

709

for attr in self.runtime_expansions }

693

710

try:

694

711

command = self.checker_command % escaped_attrs

695

712

except TypeError as error:

696

713

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

697

self.checker_command, exc_info=error)

698

return True # Try again later

714

self.checker_command,

715

exc_info=error)

716

return True # Try again later

699

717

self.current_checker_command = command

700

718

try:

701

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

702

command, self.name)

719

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

720

self.name)

703

721

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

704

722

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

705

723

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

714

732

"stderr": wnull })

715

733

self.checker = subprocess.Popen(command,

716

734

close_fds=True,

717

shell=True, cwd="/",

735

shell=True,

736

cwd="/",

718

737

**popen_args)

719

738

except OSError as error:

720

739

logger.error("Failed to start subprocess",

721

740

exc_info=error)

722

741

return True

723

self.checker_callback_tag = (gobject.child_watch_add

724

(self.checker.pid,

725

self.checker_callback,

726

data=command))

742

self.checker_callback_tag = gobject.child_watch_add(

743

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

727

744

# The checker may have completed before the gobject

728

745

# watch was added. Check for this.

729

746

try:

760

777

self.checker = None

761

778

762

779

763

def dbus_service_property(dbus_interface, signature="v",

764

access="readwrite", byte_arrays=False):

780

def dbus_service_property(dbus_interface,

781

signature="v",

782

access="readwrite",

783

byte_arrays=False):

765

784

"""Decorators for marking methods of a DBusObjectWithProperties to

766

785

become properties on the D-Bus.

767

786

777

796

if byte_arrays and signature != "ay":

778

797

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

779

798

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

799

780

800

def decorator(func):

781

801

func._dbus_is_property = True

782

802

func._dbus_interface = dbus_interface

787

807

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

788

808

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

789

809

return func

810

790

811

return decorator

791

812

792

813

801

822

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

802

823

"false"}

803

824

"""

825

804

826

def decorator(func):

805

827

func._dbus_is_interface = True

806

828

func._dbus_interface = dbus_interface

807

829

func._dbus_name = dbus_interface

808

830

return func

831

809

832

return decorator

810

833

811

834

821

844

def Property_dbus_property(self):

822

845

return dbus.Boolean(False)

823

846

"""

847

824

848

def decorator(func):

825

849

func._dbus_annotations = annotations

826

850

return func

851

827

852

return decorator

828

853

829

854

832

857

"""

833

858

pass

834

859

860

835

861

class DBusPropertyAccessException(DBusPropertyException):

836

862

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

837

863

"""

865

891

def _get_all_dbus_things(self, thing):

866

892

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

867

893

"""

868

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

869

name),

894

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

870

895

athing.__get__(self))

871

896

for cls in self.__class__.__mro__

872

897

for name, athing in

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

898

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

875

899

876

900

def _get_dbus_property(self, interface_name, property_name):

877

901

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

878

902

property with the specified name and interface.

879

903

"""

880

for cls in self.__class__.__mro__:

881

for name, value in (inspect.getmembers

882

(cls,

883

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")):

884

907

if (value._dbus_name == property_name

885

908

and value._dbus_interface == interface_name):

886

909

return value.__get__(self)

887

910

888

911

# No such property

889

raise DBusPropertyNotFound(self.dbus_object_path + ":"

890

+ interface_name + "."

891

+ property_name)

912

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

913

self.dbus_object_path, interface_name, property_name))

892

914

893

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

915

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

in_signature="ss",

894

917

out_signature="v")

895

918

def Get(self, interface_name, property_name):

896

919

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

921

944

for byte in value))

922

945

prop(value)

923

946

924

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

947

@dbus.service.method(dbus.PROPERTIES_IFACE,

948

in_signature="s",

925

949

out_signature="a{sv}")

926

950

def GetAll(self, interface_name):

927

951

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

942

966

if not hasattr(value, "variant_level"):

943

967

properties[name] = value

944

968

continue

945

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

946

value.variant_level+1)

969

properties[name] = type(value)(

970

value, variant_level = value.variant_level + 1)

947

971

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

948

972

949

973

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

967

991

connection)

968

992

try:

969

993

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

994

970

995

def make_tag(document, name, prop):

971

996

e = document.createElement("property")

972

997

e.setAttribute("name", name)

973

998

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

974

999

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

975

1000

return e

1001

976

1002

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

977

1003

# Add property tags

978

1004

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

990

1016

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

991

1017

and prop._dbus_interface

992

1018

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

993

annots.update(getattr

994

(prop,

995

"_dbus_annotations",

996

{}))

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

997

1021

for name, value in annots.items():

998

1022

ann_tag = document.createElement(

999

1023

"annotation")

1004

1028

for annotation, value in dict(

1005

1029

itertools.chain.from_iterable(

1006

1030

annotations().items()

1007

for name, annotations in

1008

self._get_all_dbus_things("interface")

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

1009

1033

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

1010

1034

)).items():

1011

1035

ann_tag = document.createElement("annotation")

1040

1064

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

1041

1065

if dt is None:

1042

1066

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

1043

return dbus.String(dt.isoformat(),

1044

variant_level=variant_level)

1067

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

1045

1068

1046

1069

1047

1070

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1067

1090

(from DBusObjectWithProperties) and interfaces (from the

1068

1091

dbus_interface_annotations decorator).

1069

1092

"""

1093

1070

1094

def wrapper(cls):

1071

1095

for orig_interface_name, alt_interface_name in (

1072

alt_interface_names.items()):

1096

alt_interface_names.items()):

1073

1097

attr = {}

1074

1098

interface_names = set()

1075

1099

# Go though all attributes of the class

1077

1101

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

1078

1102

# with the wrong interface name

1079

1103

if (not hasattr(attribute, "_dbus_interface")

1080

or not attribute._dbus_interface

1081

.startswith(orig_interface_name)):

1104

or not attribute._dbus_interface.startswith(

1105

orig_interface_name)):

1082

1106

continue

1083

1107

# Create an alternate D-Bus interface name based on

1084

1108

# the current name

1085

alt_interface = (attribute._dbus_interface

1086

.replace(orig_interface_name,

1087

alt_interface_name))

1109

alt_interface = attribute._dbus_interface.replace(

1110

orig_interface_name, alt_interface_name)

1088

1111

interface_names.add(alt_interface)

1089

1112

# Is this a D-Bus signal?

1090

1113

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

1091

1114

# Extract the original non-method undecorated

1092

1115

# function by black magic

1093

1116

nonmethod_func = (dict(

1094

zip(attribute.func_code.co_freevars,

1095

attribute.__closure__))["func"]

1096

.cell_contents)

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1097

1120

# Create a new, but exactly alike, function

1098

1121

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

1099

1122

# with the alternate D-Bus interface name

1100

new_function = (dbus.service.signal

1101

(alt_interface,

1102

attribute._dbus_signature)

1123

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1103

1125

(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)))

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)))

1109

1131

# Copy annotations, if any

1110

1132

try:

1111

new_function._dbus_annotations = (

1112

dict(attribute._dbus_annotations))

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1113

1135

except AttributeError:

1114

1136

pass

1115

1137

# Define a creator of a function to call both the

1120

1142

"""This function is a scope container to pass

1121

1143

func1 and func2 to the "call_both" function

1122

1144

outside of its arguments"""

1145

1123

1146

def call_both(*args, **kwargs):

1124

1147

"""This function will emit two D-Bus

1125

1148

signals by calling func1 and func2"""

1126

1149

func1(*args, **kwargs)

1127

1150

func2(*args, **kwargs)

1151

1128

1152

return call_both

1129

1153

# Create the "call_both" function and add it to

1130

1154

# the class

1135

1159

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

1136

1160

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

1137

1161

# to the class.

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)))

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)))

1148

1172

# Copy annotations, if any

1149

1173

try:

1150

attr[attrname]._dbus_annotations = (

1151

dict(attribute._dbus_annotations))

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1152

1176

except AttributeError:

1153

1177

pass

1154

1178

# Is this a D-Bus property?

1157

1181

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

1158

1182

# property with the alternate D-Bus interface

1159

1183

# name. Add it to the class.

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)))

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)))

1173

1195

# Copy annotations, if any

1174

1196

try:

1175

attr[attrname]._dbus_annotations = (

1176

dict(attribute._dbus_annotations))

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1177

1199

except AttributeError:

1178

1200

pass

1179

1201

# Is this a D-Bus interface?

1182

1204

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

1183

1205

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

1184

1206

# to the class.

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)))

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)))

1193

1214

if deprecate:

1194

1215

# Deprecate all alternate interfaces

1195

1216

iname="_AlternateDBusNames_interface_annotation{}"

1196

1217

for interface_name in interface_names:

1218

1197

1219

@dbus_interface_annotations(interface_name)

1198

1220

def func(self):

1199

1221

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

1200

"true" }

1222

"true" }

1201

1223

# Find an unused name

1202

1224

for aname in (iname.format(i)

1203

1225

for i in itertools.count()):

1208

1230

# Replace the class with a new subclass of it with

1209

1231

# methods, signals, etc. as created above.

1210

1232

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

1211

(cls,), attr)

1233

(cls, ), attr)

1212

1234

return cls

1235

1213

1236

return wrapper

1214

1237

1215

1238

1216

1239

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

1217

"se.bsnet.fukt.Mandos"})

1240

"se.bsnet.fukt.Mandos"})

1218

1241

class ClientDBus(Client, DBusObjectWithProperties):

1219

1242

"""A Client class using D-Bus

1220

1243

1224

1247

"""

1225

1248

1226

1249

runtime_expansions = (Client.runtime_expansions

1227

+ ("dbus_object_path",))

1250

+ ("dbus_object_path", ))

1228

1251

1229

1252

_interface = "se.recompile.Mandos.Client"

1230

1253

1238

1261

client_object_name = str(self.name).translate(

1239

1262

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

1240

1263

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

1241

self.dbus_object_path = (dbus.ObjectPath

1242

("/clients/" + client_object_name))

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1243

1266

DBusObjectWithProperties.__init__(self, self.bus,

1244

1267

self.dbus_object_path)

1245

1268

1246

def notifychangeproperty(transform_func,

1247

dbus_name, type_func=lambda x: x,

1248

variant_level=1, invalidate_only=False,

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1249

1273

_interface=_interface):

1250

1274

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

1251

1275

its changes to DBus.

1258

1282

variant_level: D-Bus variant level. Default: 1

1259

1283

"""

1260

1284

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

1285

1261

1286

def setter(self, value):

1262

1287

if hasattr(self, "dbus_object_path"):

1263

1288

if (not hasattr(self, attrname) or

1264

1289

type_func(getattr(self, attrname, None))

1265

1290

!= type_func(value)):

1266

1291

if invalidate_only:

1267

self.PropertiesChanged(_interface,

1268

dbus.Dictionary(),

1269

dbus.Array

1270

((dbus_name,)))

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1271

1295

else:

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1275

1299

self.PropertyChanged(dbus.String(dbus_name),

1276

1300

dbus_value)

1277

self.PropertiesChanged(_interface,

1278

dbus.Dictionary({

1279

dbus.String(dbus_name):

1280

dbus_value }), dbus.Array())

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1281

1306

setattr(self, attrname, value)

1282

1307

1283

1308

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

1289

1314

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

1290

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1291

1316

"LastEnabled")

1292

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

1293

type_func = lambda checker:

1294

checker is not None)

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1295

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1296

1321

"LastCheckedOK")

1297

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1300

1325

datetime_to_dbus, "LastApprovalRequest")

1301

1326

approved_by_default = notifychangeproperty(dbus.Boolean,

1302

1327

"ApprovedByDefault")

1303

approval_delay = notifychangeproperty(dbus.UInt64,

1304

"ApprovalDelay",

1305

type_func =

1306

lambda td: td.total_seconds()

1307

* 1000)

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1308

1331

approval_duration = notifychangeproperty(

1309

1332

dbus.UInt64, "ApprovalDuration",

1310

1333

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

1311

1334

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

1312

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

1313

type_func = lambda td:

1314

td.total_seconds() * 1000)

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1315

1338

extended_timeout = notifychangeproperty(

1316

1339

dbus.UInt64, "ExtendedTimeout",

1317

1340

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)

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1323

1344

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

1324

1345

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

1325

1346

invalidate_only=True)

1463

1484

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

1464

1485

1465

1486

# ApprovedByDefault - property

1466

@dbus_service_property(_interface, signature="b",

1487

@dbus_service_property(_interface,

1488

signature="b",

1467

1489

access="readwrite")

1468

1490

def ApprovedByDefault_dbus_property(self, value=None):

1469

1491

if value is None: # get

1471

1493

self.approved_by_default = bool(value)

1472

1494

1473

1495

# ApprovalDelay - property

1474

@dbus_service_property(_interface, signature="t",

1496

@dbus_service_property(_interface,

1497

signature="t",

1475

1498

access="readwrite")

1476

1499

def ApprovalDelay_dbus_property(self, value=None):

1477

1500

if value is None: # get

1480

1503

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

1481

1504

1482

1505

# ApprovalDuration - property

1483

@dbus_service_property(_interface, signature="t",

1506

@dbus_service_property(_interface,

1507

signature="t",

1484

1508

access="readwrite")

1485

1509

def ApprovalDuration_dbus_property(self, value=None):

1486

1510

if value is None: # get

1499

1523

return dbus.String(self.fingerprint)

1500

1524

1501

1525

# Host - property

1502

@dbus_service_property(_interface, signature="s",

1526

@dbus_service_property(_interface,

1527

signature="s",

1503

1528

access="readwrite")

1504

1529

def Host_dbus_property(self, value=None):

1505

1530

if value is None: # get

1517

1542

return datetime_to_dbus(self.last_enabled)

1518

1543

1519

1544

# Enabled - property

1520

@dbus_service_property(_interface, signature="b",

1545

@dbus_service_property(_interface,

1546

signature="b",

1521

1547

access="readwrite")

1522

1548

def Enabled_dbus_property(self, value=None):

1523

1549

if value is None: # get

1528

1554

self.disable()

1529

1555

1530

1556

# LastCheckedOK - property

1531

@dbus_service_property(_interface, signature="s",

1557

@dbus_service_property(_interface,

1558

signature="s",

1532

1559

access="readwrite")

1533

1560

def LastCheckedOK_dbus_property(self, value=None):

1534

1561

if value is not None:

1537

1564

return datetime_to_dbus(self.last_checked_ok)

1538

1565

1539

1566

# LastCheckerStatus - property

1540

@dbus_service_property(_interface, signature="n",

1541

access="read")

1567

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

1542

1568

def LastCheckerStatus_dbus_property(self):

1543

1569

return dbus.Int16(self.last_checker_status)

1544

1570

1553

1579

return datetime_to_dbus(self.last_approval_request)

1554

1580

1555

1581

# Timeout - property

1556

@dbus_service_property(_interface, signature="t",

1582

@dbus_service_property(_interface,

1583

signature="t",

1557

1584

access="readwrite")

1558

1585

def Timeout_dbus_property(self, value=None):

1559

1586

if value is None: # get

1572

1599

is None):

1573

1600

return

1574

1601

gobject.source_remove(self.disable_initiator_tag)

1575

self.disable_initiator_tag = (

1576

gobject.timeout_add(

1577

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

1578

* 1000), self.disable))

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1579

1605

1580

1606

# ExtendedTimeout - property

1581

@dbus_service_property(_interface, signature="t",

1607

@dbus_service_property(_interface,

1608

signature="t",

1582

1609

access="readwrite")

1583

1610

def ExtendedTimeout_dbus_property(self, value=None):

1584

1611

if value is None: # get

1587

1614

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

1588

1615

1589

1616

# Interval - property

1590

@dbus_service_property(_interface, signature="t",

1617

@dbus_service_property(_interface,

1618

signature="t",

1591

1619

access="readwrite")

1592

1620

def Interval_dbus_property(self, value=None):

1593

1621

if value is None: # get

1598

1626

if self.enabled:

1599

1627

# Reschedule checker run

1600

1628

gobject.source_remove(self.checker_initiator_tag)

1601

self.checker_initiator_tag = (gobject.timeout_add

1602

(value, self.start_checker))

1603

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

1604

1632

1605

1633

# Checker - property

1606

@dbus_service_property(_interface, signature="s",

1634

@dbus_service_property(_interface,

1635

signature="s",

1607

1636

access="readwrite")

1608

1637

def Checker_dbus_property(self, value=None):

1609

1638

if value is None: # get

1611

1640

self.checker_command = str(value)

1612

1641

1613

1642

# CheckerRunning - property

1614

@dbus_service_property(_interface, signature="b",

1643

@dbus_service_property(_interface,

1644

signature="b",

1615

1645

access="readwrite")

1616

1646

def CheckerRunning_dbus_property(self, value=None):

1617

1647

if value is None: # get

1627

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1628

1658

1629

1659

# Secret = property

1630

@dbus_service_property(_interface, signature="ay",

1631

access="write", byte_arrays=True)

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1632

1664

def Secret_dbus_property(self, value):

1633

1665

self.secret = bytes(value)

1634

1666

1640

1672

self._pipe = child_pipe

1641

1673

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

1642

1674

if not self._pipe.recv():

1643

raise KeyError()

1675

raise KeyError(fpr)

1644

1676

1645

1677

def __getattribute__(self, name):

1646

1678

if name == '_pipe':

1650

1682

if data[0] == 'data':

1651

1683

return data[1]

1652

1684

if data[0] == 'function':

1685

1653

1686

def func(*args, **kwargs):

1654

1687

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

1655

1688

return self._pipe.recv()[1]

1689

1656

1690

return func

1657

1691

1658

1692

def __setattr__(self, name, value):

1674

1708

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

1675

1709

self.server.child_pipe.fileno())

1676

1710

1677

session = (gnutls.connection

1678

.ClientSession(self.request,

1679

gnutls.connection

1680

.X509Credentials()))

1711

session = gnutls.connection.ClientSession(

1712

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

1681

1713

1682

1714

# Note: gnutls.connection.X509Credentials is really a

1683

1715

# generic GnuTLS certificate credentials object so long as

1692

1724

priority = self.server.gnutls_priority

1693

1725

if priority is None:

1694

1726

priority = "NORMAL"

1695

(gnutls.library.functions

1696

.gnutls_priority_set_direct(session._c_object,

1697

priority, None))

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1698

1729

1699

1730

# Start communication using the Mandos protocol

1700

1731

# Get protocol number

1720

1751

approval_required = False

1721

1752

try:

1722

1753

try:

1723

fpr = self.fingerprint(self.peer_certificate

1724

(session))

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1725

1756

except (TypeError,

1726

1757

gnutls.errors.GNUTLSError) as error:

1727

1758

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

1742

1773

while True:

1743

1774

if not client.enabled:

1744

1775

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

1745

client.name)

1776

client.name)

1746

1777

if self.server.use_dbus:

1747

1778

# Emit D-Bus signal

1748

1779

client.Rejected("Disabled")

1795

1826

logger.warning("gnutls send failed",

1796

1827

exc_info=error)

1797

1828

return

1798

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

1799

sent, len(client.secret)

1800

- (sent_size + sent))

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1801

1832

sent_size += sent

1802

1833

1803

1834

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

1820

1851

def peer_certificate(session):

1821

1852

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

1822

1853

# If not an OpenPGP certificate...

1823

if (gnutls.library.functions

1824

.gnutls_certificate_type_get(session._c_object)

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1825

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1826

1857

# ...do the normal thing

1827

1858

return session.peer_certificate

1841

1872

def fingerprint(openpgp):

1842

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1843

1874

# New GnuTLS "datum" with the OpenPGP public key

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))))

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)))

1849

1879

# New empty GnuTLS certificate

1850

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1851

(gnutls.library.functions

1852

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1853

1883

# Import the OpenPGP public key into the certificate

1854

(gnutls.library.functions

1855

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

1856

gnutls.library.constants

1857

.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)

1858

1887

# Verify the self signature in the key

1859

1888

crtverify = ctypes.c_uint()

1860

(gnutls.library.functions

1861

.gnutls_openpgp_crt_verify_self(crt, 0,

1862

ctypes.byref(crtverify)))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1863

1891

if crtverify.value != 0:

1864

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1865

raise (gnutls.errors.CertificateSecurityError

1866

("Verify failed"))

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1867

1895

# New buffer for the fingerprint

1868

1896

buf = ctypes.create_string_buffer(20)

1869

1897

buf_len = ctypes.c_size_t()

1870

1898

# Get the fingerprint from the certificate into the buffer

1871

(gnutls.library.functions

1872

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

1873

ctypes.byref(buf_len)))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1874

1901

# Deinit the certificate

1875

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1876

1903

# Convert the buffer to a Python bytestring

1882

1909

1883

1910

class MultiprocessingMixIn(object):

1884

1911

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

1912

1885

1913

def sub_process_main(self, request, address):

1886

1914

try:

1887

1915

self.finish_request(request, address)

1899

1927

1900

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1901

1929

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

1930

1902

1931

def process_request(self, request, client_address):

1903

1932

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

1904

1933

1925

1954

interface: None or a network interface name (string)

1926

1955

use_ipv6: Boolean; to use IPv6 or not

1927

1956

"""

1957

1928

1958

def __init__(self, server_address, RequestHandlerClass,

1929

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

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1930

1962

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

1931

1963

creating a new one with socket.socket().

1932

1964

"""

1973

2005

self.interface)

1974

2006

else:

1975

2007

try:

1976

self.socket.setsockopt(socket.SOL_SOCKET,

1977

SO_BINDTODEVICE,

1978

(self.interface + "\0")

1979

.encode("utf-8"))

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1980

2011

except socket.error as error:

1981

2012

if error.errno == errno.EPERM:

1982

2013

logger.error("No permission to bind to"

2000

2031

self.server_address = (any_address,

2001

2032

self.server_address[1])

2002

2033

elif not self.server_address[1]:

2003

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

2004

0)

2034

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

2005

2035

# if self.interface:

2006

2036

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

2007

2037

# 0, # port

2021

2051

2022

2052

Assumes a gobject.MainLoop event loop.

2023

2053

"""

2054

2024

2055

def __init__(self, server_address, RequestHandlerClass,

2025

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

2026

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):

2027

2062

self.enabled = False

2028

2063

self.clients = clients

2029

2064

if self.clients is None:

2035

2070

interface = interface,

2036

2071

use_ipv6 = use_ipv6,

2037

2072

socketfd = socketfd)

2073

2038

2074

def server_activate(self):

2039

2075

if self.enabled:

2040

2076

return socketserver.TCPServer.server_activate(self)

2044

2080

2045

2081

def add_pipe(self, parent_pipe, proc):

2046

2082

# Call "handle_ipc" for both data and EOF events

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))

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))

2053

2089

2054

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

2055

proc = None, client_object=None):

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2056

2094

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

2057

2095

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

2058

2096

# Wait for other process to exit

2081

2119

parent_pipe.send(False)

2082

2120

return False

2083

2121

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))

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))

2092

2129

parent_pipe.send(True)

2093

2130

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

2094

2131

# same fileno

2100

2137

2101

2138

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

2102

2139

funcname)(*args,

2103

**kwargs)))

2140

**kwargs)))

2104

2141

2105

2142

if command == 'getattr':

2106

2143

attrname = request[1]

2107

2144

if callable(client_object.__getattribute__(attrname)):

2108

parent_pipe.send(('function',))

2145

parent_pipe.send(('function', ))

2109

2146

else:

2110

parent_pipe.send(('data', client_object

2111

.__getattribute__(attrname)))

2147

parent_pipe.send((

2148

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

2112

2149

2113

2150

if command == 'setattr':

2114

2151

attrname = request[1]

2145

2182

# avoid excessive use of external libraries.

2146

2183

2147

2184

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

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

2185

Token = collections.namedtuple("Token", (

2186

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

2187

# a "group" containing digits

2188

"value", # datetime.timedelta or None

2189

"followers")) # Tokens valid after this token

2157

2190

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

2158

2191

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

2159

2192

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

2160

2193

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

2161

2194

datetime.timedelta(seconds=1),

2162

frozenset((token_end,)))

2195

frozenset((token_end, )))

2163

2196

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

2164

2197

datetime.timedelta(minutes=1),

2165

2198

frozenset((token_second, token_end)))

2181

2214

frozenset((token_month, token_end)))

2182

2215

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

2183

2216

datetime.timedelta(weeks=1),

2184

frozenset((token_end,)))

2217

frozenset((token_end, )))

2185

2218

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

2186

2219

frozenset((token_year, token_month,

2187

2220

token_day, token_time,

2189

2222

# Define starting values

2190

2223

value = datetime.timedelta() # Value so far

2191

2224

found_token = None

2192

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

2225

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

2193

2226

s = duration # String left to parse

2194

2227

# Loop until end token is found

2195

2228

while found_token is not token_end:

2212

2245

break

2213

2246

else:

2214

2247

# No currently valid tokens were found

2215

raise ValueError("Invalid RFC 3339 duration")

2248

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

2249

.format(duration))

2216

2250

# End token found

2217

2251

return value

2218

2252

2255

2289

elif suffix == "w":

2256

2290

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

2257

2291

else:

2258

raise ValueError("Unknown suffix {!r}"

2259

.format(suffix))

2292

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

2260

2293

except IndexError as e:

2261

2294

raise ValueError(*(e.args))

2262

2295

timevalue += delta

2278

2311

# Close all standard open file descriptors

2279

2312

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

2280

2313

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

2281

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

2314

raise OSError(errno.ENODEV,

2315

"{} not a character device"

2282

2316

.format(os.devnull))

2283

2317

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

2284

2318

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

2350

2384

"port": "",

2351

2385

"debug": "False",

2352

2386

"priority":

2353

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

2387

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

2388

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

2354

2389

"servicename": "Mandos",

2355

2390

"use_dbus": "True",

2356

2391

"use_ipv6": "True",

2360

2395

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

2361

2396

"foreground": "False",

2362

2397

"zeroconf": "True",

2363

}

2398

}

2364

2399

2365

2400

# Parse config file for server-global settings

2366

2401

server_config = configparser.SafeConfigParser(server_defaults)

2367

2402

del server_defaults

2368

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

2369

"mandos.conf"))

2403

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

2370

2404

# Convert the SafeConfigParser object to a dict

2371

2405

server_settings = server_config.defaults()

2372

2406

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

2390

2424

# Override the settings from the config file with command line

2391

2425

# options, if set.

2392

2426

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

2393

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

2394

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

2395

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

2427

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

2428

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

2429

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

2396

2430

value = getattr(options, option)

2397

2431

if value is not None:

2398

2432

server_settings[option] = value

2413

2447

2414

2448

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

2415

2449

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")

2450

if (not server_settings["zeroconf"]

2451

and not (server_settings["port"]

2452

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

2453

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

2421

2454

2422

2455

# For convenience

2423

2456

debug = server_settings["debug"]

2439

2472

initlogger(debug, level)

2440

2473

2441

2474

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

2442

syslogger.setFormatter(logging.Formatter

2443

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

2444

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

2445

.format(server_settings

2446

["servicename"])))

2475

syslogger.setFormatter(

2476

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

2477

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

2478

server_settings["servicename"])))

2447

2479

2448

2480

# Parse config file with clients

2449

2481

client_config = configparser.SafeConfigParser(Client

2457

2489

socketfd = None

2458

2490

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

2459

2491

socketfd = server_settings["socket"]

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)

2492

tcp_server = MandosServer(

2493

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

2494

ClientHandler,

2495

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

2496

use_ipv6=use_ipv6,

2497

gnutls_priority=server_settings["priority"],

2498

use_dbus=use_dbus,

2499

socketfd=socketfd)

2470

2500

if not foreground:

2471

2501

pidfilename = "/run/mandos.pid"

2472

2502

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

2473

2503

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

2474

2504

pidfile = None

2475

2505

try:

2476

pidfile = open(pidfilename, "w")

2506

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

2477

2507

except IOError as e:

2478

2508

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

2479

2509

exc_info=e)

2506

2536

def debug_gnutls(level, string):

2507

2537

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

2508

2538

2509

(gnutls.library.functions

2510

.gnutls_global_set_log_function(debug_gnutls))

2539

gnutls.library.functions.gnutls_global_set_log_function(

2540

debug_gnutls)

2511

2541

2512

2542

# Redirect stdin so all checkers get /dev/null

2513

2543

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

2533

2563

if use_dbus:

2534

2564

try:

2535

2565

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

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:

2566

bus,

2567

do_not_queue=True)

2568

old_bus_name = dbus.service.BusName(

2569

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

2570

do_not_queue=True)

2571

except dbus.exceptions.DBusException as e:

2541

2572

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

2542

2573

use_dbus = False

2543

2574

server_settings["use_dbus"] = False

2544

2575

tcp_server.use_dbus = False

2545

2576

if zeroconf:

2546

2577

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2547

service = AvahiServiceToSyslog(name =

2548

server_settings["servicename"],

2549

servicetype = "_mandos._tcp",

2550

protocol = protocol, bus = bus)

2578

service = AvahiServiceToSyslog(

2579

name = server_settings["servicename"],

2580

servicetype = "_mandos._tcp",

2581

protocol = protocol,

2582

bus = bus)

2551

2583

if server_settings["interface"]:

2552

service.interface = (if_nametoindex

2553

(server_settings["interface"]

2554

.encode("utf-8")))

2584

service.interface = if_nametoindex(

2585

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

2555

2586

2556

2587

global multiprocessing_manager

2557

2588

multiprocessing_manager = multiprocessing.Manager()

2576

2607

if server_settings["restore"]:

2577

2608

try:

2578

2609

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

2579

clients_data, old_client_settings = (pickle.load

2580

(stored_state))

2610

clients_data, old_client_settings = pickle.load(

2611

stored_state)

2581

2612

os.remove(stored_state_path)

2582

2613

except IOError as e:

2583

2614

if e.errno == errno.ENOENT:

2584

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

2585

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

2615

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

2616

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

2586

2617

else:

2587

2618

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

2588

2619

exc_info=e)

2589

2620

raise

2590

2621

except EOFError as e:

2591

2622

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

2592

"EOFError:", exc_info=e)

2623

"EOFError:",

2624

exc_info=e)

2593

2625

2594

2626

with PGPEngine() as pgp:

2595

2627

for client_name, client in clients_data.items():

2607

2639

# For each value in new config, check if it

2608

2640

# differs from the old config value (Except for

2609

2641

# the "secret" attribute)

2610

if (name != "secret" and

2611

value != old_client_settings[client_name]

2612

[name]):

2642

if (name != "secret"

2643

and (value !=

2644

old_client_settings[client_name][name])):

2613

2645

client[name] = value

2614

2646

except KeyError:

2615

2647

pass

2624

2656

if not client["last_checked_ok"]:

2625

2657

logger.warning(

2626

2658

"disabling client {} - Client never "

2627

"performed a successful checker"

2628

.format(client_name))

2659

"performed a successful checker".format(

2660

client_name))

2629

2661

client["enabled"] = False

2630

2662

elif client["last_checker_status"] != 0:

2631

2663

logger.warning(

2632

2664

"disabling client {} - Client last"

2633

" checker failed with error code {}"

2634

.format(client_name,

2635

client["last_checker_status"]))

2665

" checker failed with error code"

2666

" {}".format(

2667

client_name,

2668

client["last_checker_status"]))

2636

2669

client["enabled"] = False

2637

2670

else:

2638

client["expires"] = (datetime.datetime

2639

.utcnow()

2640

+ client["timeout"])

2671

client["expires"] = (

2672

datetime.datetime.utcnow()

2673

+ client["timeout"])

2641

2674

logger.debug("Last checker succeeded,"

2642

" keeping {} enabled"

2643

.format(client_name))

2675

" keeping {} enabled".format(

2676

client_name))

2644

2677

try:

2645

client["secret"] = (

2646

pgp.decrypt(client["encrypted_secret"],

2647

client_settings[client_name]

2648

["secret"]))

2678

client["secret"] = pgp.decrypt(

2679

client["encrypted_secret"],

2680

client_settings[client_name]["secret"])

2649

2681

except PGPError:

2650

2682

# If decryption fails, we use secret from new settings

2651

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

2652

.format(client_name))

2653

client["secret"] = (

2654

client_settings[client_name]["secret"])

2683

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

2684

client_name))

2685

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

2686

["secret"])

2655

2687

2656

2688

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

2657

2689

for client_name in (set(old_client_settings)

2664

2696

# Create all client objects

2665

2697

for client_name, client in clients_data.items():

2666

2698

tcp_server.clients[client_name] = client_class(

2667

name = client_name, settings = client,

2699

name = client_name,

2700

settings = client,

2668

2701

server_settings = server_settings)

2669

2702

2670

2703

if not tcp_server.clients:

2672

2705

2673

2706

if not foreground:

2674

2707

if pidfile is not None:

2708

pid = os.getpid()

2675

2709

try:

2676

2710

with pidfile:

2677

pid = os.getpid()

2678

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

2711

print(pid, file=pidfile)

2679

2712

except IOError:

2680

2713

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

2681

2714

pidfilename, pid)

2686

2719

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

2687

2720

2688

2721

if use_dbus:

2689

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

2690

"se.bsnet.fukt.Mandos"})

2722

2723

@alternate_dbus_interfaces(

2724

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

2691

2725

class MandosDBusService(DBusObjectWithProperties):

2692

2726

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

2727

2693

2728

def __init__(self):

2694

2729

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

2730

2695

2731

_interface = "se.recompile.Mandos"

2696

2732

2697

2733

@dbus_interface_annotations(_interface)

2698

2734

def _foo(self):

2699

return { "org.freedesktop.DBus.Property"

2700

".EmitsChangedSignal":

2701

"false"}

2735

return {

2736

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

2737

"false" }

2702

2738

2703

2739

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

2704

2740

def ClientAdded(self, objpath):

2718

2754

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

2719

2755

def GetAllClients(self):

2720

2756

"D-Bus method"

2721

return dbus.Array(c.dbus_object_path

2722

for c in

2757

return dbus.Array(c.dbus_object_path for c in

2723

2758

tcp_server.clients.itervalues())

2724

2759

2725

2760

@dbus.service.method(_interface,

2774

2809

# + secret.

2775

2810

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

2776

2811

"checker", "server_settings" }

2777

for name, typ in (inspect.getmembers

2778

(dbus.service.Object)):

2812

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

2813

.Object):

2779

2814

exclude.add(name)

2780

2815

2781

2816

client_dict["encrypted_secret"] = (client

2788

2823

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

2789

2824

2790

2825

try:

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:

2826

with tempfile.NamedTemporaryFile(

2827

mode='wb',

2828

suffix=".pickle",

2829

prefix='clients-',

2830

dir=os.path.dirname(stored_state_path),

2831

delete=False) as stored_state:

2795

2832

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

2796

tempname=stored_state.name

2833

tempname = stored_state.name

2797

2834

os.rename(tempname, stored_state_path)

2798

2835

except (IOError, OSError) as e:

2799

2836

if not debug:

2818

2855

client.disable(quiet=True)

2819

2856

if use_dbus:

2820

2857

# Emit D-Bus signal

2821

mandos_dbus_service.ClientRemoved(client

2822

.dbus_object_path,

2823

client.name)

2858

mandos_dbus_service.ClientRemoved(

2859

client.dbus_object_path, client.name)

2824

2860

client_settings.clear()

2825

2861

2826

2862

atexit.register(cleanup)

2879

2915

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

2880

2916

cleanup()

2881

2917

2918

2882

2919

if __name__ == '__main__':

2883

2920

main()